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llvm-project/clang/lib/CodeGen/CGStmtOpenMP.cpp

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//===--- CGStmtOpenMP.cpp - Emit LLVM Code from Statements ----------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This contains code to emit OpenMP nodes as LLVM code.
//
//===----------------------------------------------------------------------===//
#include "CGCleanup.h"
#include "CGOpenMPRuntime.h"
#include "CodeGenFunction.h"
#include "CodeGenModule.h"
#include "TargetInfo.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Attr.h"
#include "clang/AST/DeclOpenMP.h"
#include "clang/AST/OpenMPClause.h"
#include "clang/AST/Stmt.h"
#include "clang/AST/StmtOpenMP.h"
#include "clang/AST/StmtVisitor.h"
#include "clang/Basic/OpenMPKinds.h"
#include "clang/Basic/PrettyStackTrace.h"
#include "llvm/Frontend/OpenMP/OMPConstants.h"
#include "llvm/Frontend/OpenMP/OMPIRBuilder.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Instructions.h"
#include "llvm/Support/AtomicOrdering.h"
using namespace clang;
using namespace CodeGen;
using namespace llvm::omp;
static const VarDecl *getBaseDecl(const Expr *Ref);
namespace {
/// Lexical scope for OpenMP executable constructs, that handles correct codegen
/// for captured expressions.
class OMPLexicalScope : public CodeGenFunction::LexicalScope {
void emitPreInitStmt(CodeGenFunction &CGF, const OMPExecutableDirective &S) {
for (const auto *C : S.clauses()) {
if (const auto *CPI = OMPClauseWithPreInit::get(C)) {
if (const auto *PreInit =
cast_or_null<DeclStmt>(CPI->getPreInitStmt())) {
for (const auto *I : PreInit->decls()) {
if (!I->hasAttr<OMPCaptureNoInitAttr>()) {
CGF.EmitVarDecl(cast<VarDecl>(*I));
} else {
CodeGenFunction::AutoVarEmission Emission =
CGF.EmitAutoVarAlloca(cast<VarDecl>(*I));
CGF.EmitAutoVarCleanups(Emission);
}
}
}
}
}
}
CodeGenFunction::OMPPrivateScope InlinedShareds;
static bool isCapturedVar(CodeGenFunction &CGF, const VarDecl *VD) {
return CGF.LambdaCaptureFields.lookup(VD) ||
(CGF.CapturedStmtInfo && CGF.CapturedStmtInfo->lookup(VD)) ||
(CGF.CurCodeDecl && isa<BlockDecl>(CGF.CurCodeDecl) &&
cast<BlockDecl>(CGF.CurCodeDecl)->capturesVariable(VD));
}
public:
OMPLexicalScope(
CodeGenFunction &CGF, const OMPExecutableDirective &S,
const llvm::Optional<OpenMPDirectiveKind> CapturedRegion = llvm::None,
const bool EmitPreInitStmt = true)
: CodeGenFunction::LexicalScope(CGF, S.getSourceRange()),
InlinedShareds(CGF) {
if (EmitPreInitStmt)
emitPreInitStmt(CGF, S);
if (!CapturedRegion.hasValue())
return;
assert(S.hasAssociatedStmt() &&
"Expected associated statement for inlined directive.");
const CapturedStmt *CS = S.getCapturedStmt(*CapturedRegion);
for (const auto &C : CS->captures()) {
if (C.capturesVariable() || C.capturesVariableByCopy()) {
auto *VD = C.getCapturedVar();
assert(VD == VD->getCanonicalDecl() &&
"Canonical decl must be captured.");
DeclRefExpr DRE(
CGF.getContext(), const_cast<VarDecl *>(VD),
isCapturedVar(CGF, VD) || (CGF.CapturedStmtInfo &&
InlinedShareds.isGlobalVarCaptured(VD)),
VD->getType().getNonReferenceType(), VK_LValue, C.getLocation());
InlinedShareds.addPrivate(VD, [&CGF, &DRE]() -> Address {
return CGF.EmitLValue(&DRE).getAddress(CGF);
});
}
}
(void)InlinedShareds.Privatize();
}
};
/// Lexical scope for OpenMP parallel construct, that handles correct codegen
/// for captured expressions.
class OMPParallelScope final : public OMPLexicalScope {
bool EmitPreInitStmt(const OMPExecutableDirective &S) {
OpenMPDirectiveKind Kind = S.getDirectiveKind();
return !(isOpenMPTargetExecutionDirective(Kind) ||
isOpenMPLoopBoundSharingDirective(Kind)) &&
isOpenMPParallelDirective(Kind);
}
public:
OMPParallelScope(CodeGenFunction &CGF, const OMPExecutableDirective &S)
: OMPLexicalScope(CGF, S, /*CapturedRegion=*/llvm::None,
EmitPreInitStmt(S)) {}
};
/// Lexical scope for OpenMP teams construct, that handles correct codegen
/// for captured expressions.
class OMPTeamsScope final : public OMPLexicalScope {
bool EmitPreInitStmt(const OMPExecutableDirective &S) {
OpenMPDirectiveKind Kind = S.getDirectiveKind();
return !isOpenMPTargetExecutionDirective(Kind) &&
isOpenMPTeamsDirective(Kind);
}
public:
OMPTeamsScope(CodeGenFunction &CGF, const OMPExecutableDirective &S)
: OMPLexicalScope(CGF, S, /*CapturedRegion=*/llvm::None,
EmitPreInitStmt(S)) {}
};
/// Private scope for OpenMP loop-based directives, that supports capturing
/// of used expression from loop statement.
class OMPLoopScope : public CodeGenFunction::RunCleanupsScope {
void emitPreInitStmt(CodeGenFunction &CGF, const OMPLoopBasedDirective &S) {
const DeclStmt *PreInits;
CodeGenFunction::OMPMapVars PreCondVars;
if (auto *LD = dyn_cast<OMPLoopDirective>(&S)) {
llvm::DenseSet<const VarDecl *> EmittedAsPrivate;
for (const auto *E : LD->counters()) {
const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl());
EmittedAsPrivate.insert(VD->getCanonicalDecl());
(void)PreCondVars.setVarAddr(
CGF, VD, CGF.CreateMemTemp(VD->getType().getNonReferenceType()));
}
// Mark private vars as undefs.
for (const auto *C : LD->getClausesOfKind<OMPPrivateClause>()) {
for (const Expr *IRef : C->varlists()) {
const auto *OrigVD =
cast<VarDecl>(cast<DeclRefExpr>(IRef)->getDecl());
if (EmittedAsPrivate.insert(OrigVD->getCanonicalDecl()).second) {
(void)PreCondVars.setVarAddr(
CGF, OrigVD,
Address(llvm::UndefValue::get(CGF.ConvertTypeForMem(
CGF.getContext().getPointerType(
OrigVD->getType().getNonReferenceType()))),
CGF.getContext().getDeclAlign(OrigVD)));
}
}
}
(void)PreCondVars.apply(CGF);
// Emit init, __range and __end variables for C++ range loops.
(void)OMPLoopBasedDirective::doForAllLoops(
LD->getInnermostCapturedStmt()->getCapturedStmt(),
/*TryImperfectlyNestedLoops=*/true, LD->getLoopsNumber(),
[&CGF](unsigned Cnt, const Stmt *CurStmt) {
if (const auto *CXXFor = dyn_cast<CXXForRangeStmt>(CurStmt)) {
if (const Stmt *Init = CXXFor->getInit())
CGF.EmitStmt(Init);
CGF.EmitStmt(CXXFor->getRangeStmt());
CGF.EmitStmt(CXXFor->getEndStmt());
}
return false;
});
PreInits = cast_or_null<DeclStmt>(LD->getPreInits());
} else if (const auto *Tile = dyn_cast<OMPTileDirective>(&S)) {
PreInits = cast_or_null<DeclStmt>(Tile->getPreInits());
} else if (const auto *Unroll = dyn_cast<OMPUnrollDirective>(&S)) {
PreInits = cast_or_null<DeclStmt>(Unroll->getPreInits());
} else {
llvm_unreachable("Unknown loop-based directive kind.");
}
if (PreInits) {
for (const auto *I : PreInits->decls())
CGF.EmitVarDecl(cast<VarDecl>(*I));
}
PreCondVars.restore(CGF);
}
public:
OMPLoopScope(CodeGenFunction &CGF, const OMPLoopBasedDirective &S)
: CodeGenFunction::RunCleanupsScope(CGF) {
emitPreInitStmt(CGF, S);
}
};
class OMPSimdLexicalScope : public CodeGenFunction::LexicalScope {
CodeGenFunction::OMPPrivateScope InlinedShareds;
static bool isCapturedVar(CodeGenFunction &CGF, const VarDecl *VD) {
return CGF.LambdaCaptureFields.lookup(VD) ||
(CGF.CapturedStmtInfo && CGF.CapturedStmtInfo->lookup(VD)) ||
(CGF.CurCodeDecl && isa<BlockDecl>(CGF.CurCodeDecl) &&
cast<BlockDecl>(CGF.CurCodeDecl)->capturesVariable(VD));
}
public:
OMPSimdLexicalScope(CodeGenFunction &CGF, const OMPExecutableDirective &S)
: CodeGenFunction::LexicalScope(CGF, S.getSourceRange()),
InlinedShareds(CGF) {
for (const auto *C : S.clauses()) {
if (const auto *CPI = OMPClauseWithPreInit::get(C)) {
if (const auto *PreInit =
cast_or_null<DeclStmt>(CPI->getPreInitStmt())) {
for (const auto *I : PreInit->decls()) {
if (!I->hasAttr<OMPCaptureNoInitAttr>()) {
CGF.EmitVarDecl(cast<VarDecl>(*I));
} else {
CodeGenFunction::AutoVarEmission Emission =
CGF.EmitAutoVarAlloca(cast<VarDecl>(*I));
CGF.EmitAutoVarCleanups(Emission);
}
}
}
} else if (const auto *UDP = dyn_cast<OMPUseDevicePtrClause>(C)) {
for (const Expr *E : UDP->varlists()) {
const Decl *D = cast<DeclRefExpr>(E)->getDecl();
if (const auto *OED = dyn_cast<OMPCapturedExprDecl>(D))
CGF.EmitVarDecl(*OED);
}
} else if (const auto *UDP = dyn_cast<OMPUseDeviceAddrClause>(C)) {
for (const Expr *E : UDP->varlists()) {
const Decl *D = getBaseDecl(E);
if (const auto *OED = dyn_cast<OMPCapturedExprDecl>(D))
CGF.EmitVarDecl(*OED);
}
}
}
if (!isOpenMPSimdDirective(S.getDirectiveKind()))
CGF.EmitOMPPrivateClause(S, InlinedShareds);
if (const auto *TG = dyn_cast<OMPTaskgroupDirective>(&S)) {
if (const Expr *E = TG->getReductionRef())
CGF.EmitVarDecl(*cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl()));
}
// Temp copy arrays for inscan reductions should not be emitted as they are
// not used in simd only mode.
llvm::DenseSet<CanonicalDeclPtr<const Decl>> CopyArrayTemps;
for (const auto *C : S.getClausesOfKind<OMPReductionClause>()) {
if (C->getModifier() != OMPC_REDUCTION_inscan)
continue;
for (const Expr *E : C->copy_array_temps())
CopyArrayTemps.insert(cast<DeclRefExpr>(E)->getDecl());
}
const auto *CS = cast_or_null<CapturedStmt>(S.getAssociatedStmt());
while (CS) {
for (auto &C : CS->captures()) {
if (C.capturesVariable() || C.capturesVariableByCopy()) {
auto *VD = C.getCapturedVar();
if (CopyArrayTemps.contains(VD))
continue;
assert(VD == VD->getCanonicalDecl() &&
"Canonical decl must be captured.");
DeclRefExpr DRE(CGF.getContext(), const_cast<VarDecl *>(VD),
isCapturedVar(CGF, VD) ||
(CGF.CapturedStmtInfo &&
InlinedShareds.isGlobalVarCaptured(VD)),
VD->getType().getNonReferenceType(), VK_LValue,
C.getLocation());
InlinedShareds.addPrivate(VD, [&CGF, &DRE]() -> Address {
return CGF.EmitLValue(&DRE).getAddress(CGF);
});
}
}
CS = dyn_cast<CapturedStmt>(CS->getCapturedStmt());
}
(void)InlinedShareds.Privatize();
}
};
} // namespace
static void emitCommonOMPTargetDirective(CodeGenFunction &CGF,
const OMPExecutableDirective &S,
const RegionCodeGenTy &CodeGen);
LValue CodeGenFunction::EmitOMPSharedLValue(const Expr *E) {
if (const auto *OrigDRE = dyn_cast<DeclRefExpr>(E)) {
if (const auto *OrigVD = dyn_cast<VarDecl>(OrigDRE->getDecl())) {
OrigVD = OrigVD->getCanonicalDecl();
bool IsCaptured =
LambdaCaptureFields.lookup(OrigVD) ||
(CapturedStmtInfo && CapturedStmtInfo->lookup(OrigVD)) ||
(CurCodeDecl && isa<BlockDecl>(CurCodeDecl));
DeclRefExpr DRE(getContext(), const_cast<VarDecl *>(OrigVD), IsCaptured,
OrigDRE->getType(), VK_LValue, OrigDRE->getExprLoc());
return EmitLValue(&DRE);
}
}
return EmitLValue(E);
}
llvm::Value *CodeGenFunction::getTypeSize(QualType Ty) {
ASTContext &C = getContext();
llvm::Value *Size = nullptr;
auto SizeInChars = C.getTypeSizeInChars(Ty);
if (SizeInChars.isZero()) {
// getTypeSizeInChars() returns 0 for a VLA.
while (const VariableArrayType *VAT = C.getAsVariableArrayType(Ty)) {
VlaSizePair VlaSize = getVLASize(VAT);
Ty = VlaSize.Type;
Size = Size ? Builder.CreateNUWMul(Size, VlaSize.NumElts)
: VlaSize.NumElts;
}
SizeInChars = C.getTypeSizeInChars(Ty);
if (SizeInChars.isZero())
return llvm::ConstantInt::get(SizeTy, /*V=*/0);
return Builder.CreateNUWMul(Size, CGM.getSize(SizeInChars));
}
return CGM.getSize(SizeInChars);
}
void CodeGenFunction::GenerateOpenMPCapturedVars(
const CapturedStmt &S, SmallVectorImpl<llvm::Value *> &CapturedVars) {
const RecordDecl *RD = S.getCapturedRecordDecl();
auto CurField = RD->field_begin();
auto CurCap = S.captures().begin();
for (CapturedStmt::const_capture_init_iterator I = S.capture_init_begin(),
E = S.capture_init_end();
I != E; ++I, ++CurField, ++CurCap) {
if (CurField->hasCapturedVLAType()) {
const VariableArrayType *VAT = CurField->getCapturedVLAType();
llvm::Value *Val = VLASizeMap[VAT->getSizeExpr()];
CapturedVars.push_back(Val);
} else if (CurCap->capturesThis()) {
CapturedVars.push_back(CXXThisValue);
} else if (CurCap->capturesVariableByCopy()) {
llvm::Value *CV = EmitLoadOfScalar(EmitLValue(*I), CurCap->getLocation());
// If the field is not a pointer, we need to save the actual value
// and load it as a void pointer.
if (!CurField->getType()->isAnyPointerType()) {
ASTContext &Ctx = getContext();
Address DstAddr = CreateMemTemp(
Ctx.getUIntPtrType(),
Twine(CurCap->getCapturedVar()->getName(), ".casted"));
LValue DstLV = MakeAddrLValue(DstAddr, Ctx.getUIntPtrType());
llvm::Value *SrcAddrVal = EmitScalarConversion(
DstAddr.getPointer(), Ctx.getPointerType(Ctx.getUIntPtrType()),
Ctx.getPointerType(CurField->getType()), CurCap->getLocation());
LValue SrcLV =
MakeNaturalAlignAddrLValue(SrcAddrVal, CurField->getType());
// Store the value using the source type pointer.
EmitStoreThroughLValue(RValue::get(CV), SrcLV);
// Load the value using the destination type pointer.
CV = EmitLoadOfScalar(DstLV, CurCap->getLocation());
}
CapturedVars.push_back(CV);
} else {
assert(CurCap->capturesVariable() && "Expected capture by reference.");
CapturedVars.push_back(EmitLValue(*I).getAddress(*this).getPointer());
}
}
}
static Address castValueFromUintptr(CodeGenFunction &CGF, SourceLocation Loc,
QualType DstType, StringRef Name,
LValue AddrLV) {
ASTContext &Ctx = CGF.getContext();
llvm::Value *CastedPtr = CGF.EmitScalarConversion(
AddrLV.getAddress(CGF).getPointer(), Ctx.getUIntPtrType(),
Ctx.getPointerType(DstType), Loc);
Address TmpAddr =
CGF.MakeNaturalAlignAddrLValue(CastedPtr, Ctx.getPointerType(DstType))
.getAddress(CGF);
return TmpAddr;
}
static QualType getCanonicalParamType(ASTContext &C, QualType T) {
if (T->isLValueReferenceType())
return C.getLValueReferenceType(
getCanonicalParamType(C, T.getNonReferenceType()),
/*SpelledAsLValue=*/false);
if (T->isPointerType())
return C.getPointerType(getCanonicalParamType(C, T->getPointeeType()));
if (const ArrayType *A = T->getAsArrayTypeUnsafe()) {
if (const auto *VLA = dyn_cast<VariableArrayType>(A))
return getCanonicalParamType(C, VLA->getElementType());
if (!A->isVariablyModifiedType())
return C.getCanonicalType(T);
}
return C.getCanonicalParamType(T);
}
namespace {
/// Contains required data for proper outlined function codegen.
struct FunctionOptions {
/// Captured statement for which the function is generated.
const CapturedStmt *S = nullptr;
/// true if cast to/from UIntPtr is required for variables captured by
/// value.
const bool UIntPtrCastRequired = true;
/// true if only casted arguments must be registered as local args or VLA
/// sizes.
const bool RegisterCastedArgsOnly = false;
/// Name of the generated function.
const StringRef FunctionName;
/// Location of the non-debug version of the outlined function.
SourceLocation Loc;
explicit FunctionOptions(const CapturedStmt *S, bool UIntPtrCastRequired,
bool RegisterCastedArgsOnly, StringRef FunctionName,
SourceLocation Loc)
: S(S), UIntPtrCastRequired(UIntPtrCastRequired),
RegisterCastedArgsOnly(UIntPtrCastRequired && RegisterCastedArgsOnly),
FunctionName(FunctionName), Loc(Loc) {}
};
} // namespace
static llvm::Function *emitOutlinedFunctionPrologue(
CodeGenFunction &CGF, FunctionArgList &Args,
llvm::MapVector<const Decl *, std::pair<const VarDecl *, Address>>
&LocalAddrs,
llvm::DenseMap<const Decl *, std::pair<const Expr *, llvm::Value *>>
&VLASizes,
llvm::Value *&CXXThisValue, const FunctionOptions &FO) {
const CapturedDecl *CD = FO.S->getCapturedDecl();
const RecordDecl *RD = FO.S->getCapturedRecordDecl();
assert(CD->hasBody() && "missing CapturedDecl body");
CXXThisValue = nullptr;
// Build the argument list.
CodeGenModule &CGM = CGF.CGM;
ASTContext &Ctx = CGM.getContext();
FunctionArgList TargetArgs;
Args.append(CD->param_begin(),
std::next(CD->param_begin(), CD->getContextParamPosition()));
TargetArgs.append(
CD->param_begin(),
std::next(CD->param_begin(), CD->getContextParamPosition()));
auto I = FO.S->captures().begin();
FunctionDecl *DebugFunctionDecl = nullptr;
if (!FO.UIntPtrCastRequired) {
FunctionProtoType::ExtProtoInfo EPI;
QualType FunctionTy = Ctx.getFunctionType(Ctx.VoidTy, llvm::None, EPI);
DebugFunctionDecl = FunctionDecl::Create(
Ctx, Ctx.getTranslationUnitDecl(), FO.S->getBeginLoc(),
SourceLocation(), DeclarationName(), FunctionTy,
Ctx.getTrivialTypeSourceInfo(FunctionTy), SC_Static,
/*isInlineSpecified=*/false, /*hasWrittenPrototype=*/false);
}
for (const FieldDecl *FD : RD->fields()) {
QualType ArgType = FD->getType();
IdentifierInfo *II = nullptr;
VarDecl *CapVar = nullptr;
// If this is a capture by copy and the type is not a pointer, the outlined
// function argument type should be uintptr and the value properly casted to
// uintptr. This is necessary given that the runtime library is only able to
// deal with pointers. We can pass in the same way the VLA type sizes to the
// outlined function.
if (FO.UIntPtrCastRequired &&
((I->capturesVariableByCopy() && !ArgType->isAnyPointerType()) ||
I->capturesVariableArrayType()))
ArgType = Ctx.getUIntPtrType();
if (I->capturesVariable() || I->capturesVariableByCopy()) {
CapVar = I->getCapturedVar();
II = CapVar->getIdentifier();
} else if (I->capturesThis()) {
II = &Ctx.Idents.get("this");
} else {
assert(I->capturesVariableArrayType());
II = &Ctx.Idents.get("vla");
}
if (ArgType->isVariablyModifiedType())
ArgType = getCanonicalParamType(Ctx, ArgType);
VarDecl *Arg;
if (DebugFunctionDecl && (CapVar || I->capturesThis())) {
Arg = ParmVarDecl::Create(
Ctx, DebugFunctionDecl,
CapVar ? CapVar->getBeginLoc() : FD->getBeginLoc(),
CapVar ? CapVar->getLocation() : FD->getLocation(), II, ArgType,
/*TInfo=*/nullptr, SC_None, /*DefArg=*/nullptr);
} else {
Arg = ImplicitParamDecl::Create(Ctx, /*DC=*/nullptr, FD->getLocation(),
II, ArgType, ImplicitParamDecl::Other);
}
Args.emplace_back(Arg);
// Do not cast arguments if we emit function with non-original types.
TargetArgs.emplace_back(
FO.UIntPtrCastRequired
? Arg
: CGM.getOpenMPRuntime().translateParameter(FD, Arg));
++I;
}
Args.append(
std::next(CD->param_begin(), CD->getContextParamPosition() + 1),
CD->param_end());
TargetArgs.append(
std::next(CD->param_begin(), CD->getContextParamPosition() + 1),
CD->param_end());
// Create the function declaration.
const CGFunctionInfo &FuncInfo =
CGM.getTypes().arrangeBuiltinFunctionDeclaration(Ctx.VoidTy, TargetArgs);
llvm::FunctionType *FuncLLVMTy = CGM.getTypes().GetFunctionType(FuncInfo);
auto *F =
llvm::Function::Create(FuncLLVMTy, llvm::GlobalValue::InternalLinkage,
FO.FunctionName, &CGM.getModule());
CGM.SetInternalFunctionAttributes(CD, F, FuncInfo);
if (CD->isNothrow())
F->setDoesNotThrow();
F->setDoesNotRecurse();
// Generate the function.
CGF.StartFunction(CD, Ctx.VoidTy, F, FuncInfo, TargetArgs,
FO.UIntPtrCastRequired ? FO.Loc : FO.S->getBeginLoc(),
FO.UIntPtrCastRequired ? FO.Loc
: CD->getBody()->getBeginLoc());
unsigned Cnt = CD->getContextParamPosition();
I = FO.S->captures().begin();
for (const FieldDecl *FD : RD->fields()) {
// Do not map arguments if we emit function with non-original types.
Address LocalAddr(Address::invalid());
if (!FO.UIntPtrCastRequired && Args[Cnt] != TargetArgs[Cnt]) {
LocalAddr = CGM.getOpenMPRuntime().getParameterAddress(CGF, Args[Cnt],
TargetArgs[Cnt]);
} else {
LocalAddr = CGF.GetAddrOfLocalVar(Args[Cnt]);
}
// If we are capturing a pointer by copy we don't need to do anything, just
// use the value that we get from the arguments.
if (I->capturesVariableByCopy() && FD->getType()->isAnyPointerType()) {
const VarDecl *CurVD = I->getCapturedVar();
if (!FO.RegisterCastedArgsOnly)
LocalAddrs.insert({Args[Cnt], {CurVD, LocalAddr}});
++Cnt;
++I;
continue;
}
LValue ArgLVal = CGF.MakeAddrLValue(LocalAddr, Args[Cnt]->getType(),
AlignmentSource::Decl);
if (FD->hasCapturedVLAType()) {
if (FO.UIntPtrCastRequired) {
ArgLVal = CGF.MakeAddrLValue(
castValueFromUintptr(CGF, I->getLocation(), FD->getType(),
Args[Cnt]->getName(), ArgLVal),
FD->getType(), AlignmentSource::Decl);
}
llvm::Value *ExprArg = CGF.EmitLoadOfScalar(ArgLVal, I->getLocation());
const VariableArrayType *VAT = FD->getCapturedVLAType();
VLASizes.try_emplace(Args[Cnt], VAT->getSizeExpr(), ExprArg);
} else if (I->capturesVariable()) {
const VarDecl *Var = I->getCapturedVar();
QualType VarTy = Var->getType();
Address ArgAddr = ArgLVal.getAddress(CGF);
if (ArgLVal.getType()->isLValueReferenceType()) {
ArgAddr = CGF.EmitLoadOfReference(ArgLVal);
} else if (!VarTy->isVariablyModifiedType() || !VarTy->isPointerType()) {
assert(ArgLVal.getType()->isPointerType());
ArgAddr = CGF.EmitLoadOfPointer(
ArgAddr, ArgLVal.getType()->castAs<PointerType>());
}
if (!FO.RegisterCastedArgsOnly) {
LocalAddrs.insert(
{Args[Cnt],
{Var, Address(ArgAddr.getPointer(), Ctx.getDeclAlign(Var))}});
}
} else if (I->capturesVariableByCopy()) {
assert(!FD->getType()->isAnyPointerType() &&
"Not expecting a captured pointer.");
const VarDecl *Var = I->getCapturedVar();
LocalAddrs.insert({Args[Cnt],
{Var, FO.UIntPtrCastRequired
? castValueFromUintptr(
CGF, I->getLocation(), FD->getType(),
Args[Cnt]->getName(), ArgLVal)
: ArgLVal.getAddress(CGF)}});
} else {
// If 'this' is captured, load it into CXXThisValue.
assert(I->capturesThis());
CXXThisValue = CGF.EmitLoadOfScalar(ArgLVal, I->getLocation());
LocalAddrs.insert({Args[Cnt], {nullptr, ArgLVal.getAddress(CGF)}});
}
++Cnt;
++I;
}
return F;
}
llvm::Function *
CodeGenFunction::GenerateOpenMPCapturedStmtFunction(const CapturedStmt &S,
SourceLocation Loc) {
assert(
CapturedStmtInfo &&
"CapturedStmtInfo should be set when generating the captured function");
const CapturedDecl *CD = S.getCapturedDecl();
// Build the argument list.
bool NeedWrapperFunction =
getDebugInfo() && CGM.getCodeGenOpts().hasReducedDebugInfo();
FunctionArgList Args;
llvm::MapVector<const Decl *, std::pair<const VarDecl *, Address>> LocalAddrs;
llvm::DenseMap<const Decl *, std::pair<const Expr *, llvm::Value *>> VLASizes;
SmallString<256> Buffer;
llvm::raw_svector_ostream Out(Buffer);
Out << CapturedStmtInfo->getHelperName();
if (NeedWrapperFunction)
Out << "_debug__";
FunctionOptions FO(&S, !NeedWrapperFunction, /*RegisterCastedArgsOnly=*/false,
Out.str(), Loc);
llvm::Function *F = emitOutlinedFunctionPrologue(*this, Args, LocalAddrs,
VLASizes, CXXThisValue, FO);
CodeGenFunction::OMPPrivateScope LocalScope(*this);
for (const auto &LocalAddrPair : LocalAddrs) {
if (LocalAddrPair.second.first) {
LocalScope.addPrivate(LocalAddrPair.second.first, [&LocalAddrPair]() {
return LocalAddrPair.second.second;
});
}
}
(void)LocalScope.Privatize();
for (const auto &VLASizePair : VLASizes)
VLASizeMap[VLASizePair.second.first] = VLASizePair.second.second;
PGO.assignRegionCounters(GlobalDecl(CD), F);
CapturedStmtInfo->EmitBody(*this, CD->getBody());
(void)LocalScope.ForceCleanup();
FinishFunction(CD->getBodyRBrace());
if (!NeedWrapperFunction)
return F;
FunctionOptions WrapperFO(&S, /*UIntPtrCastRequired=*/true,
/*RegisterCastedArgsOnly=*/true,
CapturedStmtInfo->getHelperName(), Loc);
CodeGenFunction WrapperCGF(CGM, /*suppressNewContext=*/true);
WrapperCGF.CapturedStmtInfo = CapturedStmtInfo;
Args.clear();
LocalAddrs.clear();
VLASizes.clear();
llvm::Function *WrapperF =
emitOutlinedFunctionPrologue(WrapperCGF, Args, LocalAddrs, VLASizes,
WrapperCGF.CXXThisValue, WrapperFO);
llvm::SmallVector<llvm::Value *, 4> CallArgs;
auto *PI = F->arg_begin();
for (const auto *Arg : Args) {
llvm::Value *CallArg;
auto I = LocalAddrs.find(Arg);
if (I != LocalAddrs.end()) {
LValue LV = WrapperCGF.MakeAddrLValue(
I->second.second,
I->second.first ? I->second.first->getType() : Arg->getType(),
AlignmentSource::Decl);
if (LV.getType()->isAnyComplexType())
LV.setAddress(WrapperCGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
LV.getAddress(WrapperCGF),
PI->getType()->getPointerTo(
LV.getAddress(WrapperCGF).getAddressSpace())));
CallArg = WrapperCGF.EmitLoadOfScalar(LV, S.getBeginLoc());
} else {
auto EI = VLASizes.find(Arg);
if (EI != VLASizes.end()) {
CallArg = EI->second.second;
} else {
LValue LV = WrapperCGF.MakeAddrLValue(WrapperCGF.GetAddrOfLocalVar(Arg),
Arg->getType(),
AlignmentSource::Decl);
CallArg = WrapperCGF.EmitLoadOfScalar(LV, S.getBeginLoc());
}
}
CallArgs.emplace_back(WrapperCGF.EmitFromMemory(CallArg, Arg->getType()));
++PI;
}
CGM.getOpenMPRuntime().emitOutlinedFunctionCall(WrapperCGF, Loc, F, CallArgs);
WrapperCGF.FinishFunction();
return WrapperF;
}
//===----------------------------------------------------------------------===//
// OpenMP Directive Emission
//===----------------------------------------------------------------------===//
void CodeGenFunction::EmitOMPAggregateAssign(
Address DestAddr, Address SrcAddr, QualType OriginalType,
const llvm::function_ref<void(Address, Address)> CopyGen) {
// Perform element-by-element initialization.
QualType ElementTy;
// Drill down to the base element type on both arrays.
const ArrayType *ArrayTy = OriginalType->getAsArrayTypeUnsafe();
llvm::Value *NumElements = emitArrayLength(ArrayTy, ElementTy, DestAddr);
SrcAddr = Builder.CreateElementBitCast(SrcAddr, DestAddr.getElementType());
llvm::Value *SrcBegin = SrcAddr.getPointer();
llvm::Value *DestBegin = DestAddr.getPointer();
// Cast from pointer to array type to pointer to single element.
llvm::Value *DestEnd = Builder.CreateGEP(DestBegin, NumElements);
// The basic structure here is a while-do loop.
llvm::BasicBlock *BodyBB = createBasicBlock("omp.arraycpy.body");
llvm::BasicBlock *DoneBB = createBasicBlock("omp.arraycpy.done");
llvm::Value *IsEmpty =
Builder.CreateICmpEQ(DestBegin, DestEnd, "omp.arraycpy.isempty");
Builder.CreateCondBr(IsEmpty, DoneBB, BodyBB);
// Enter the loop body, making that address the current address.
llvm::BasicBlock *EntryBB = Builder.GetInsertBlock();
EmitBlock(BodyBB);
CharUnits ElementSize = getContext().getTypeSizeInChars(ElementTy);
llvm::PHINode *SrcElementPHI =
Builder.CreatePHI(SrcBegin->getType(), 2, "omp.arraycpy.srcElementPast");
SrcElementPHI->addIncoming(SrcBegin, EntryBB);
Address SrcElementCurrent =
Address(SrcElementPHI,
SrcAddr.getAlignment().alignmentOfArrayElement(ElementSize));
llvm::PHINode *DestElementPHI =
Builder.CreatePHI(DestBegin->getType(), 2, "omp.arraycpy.destElementPast");
DestElementPHI->addIncoming(DestBegin, EntryBB);
Address DestElementCurrent =
Address(DestElementPHI,
DestAddr.getAlignment().alignmentOfArrayElement(ElementSize));
// Emit copy.
CopyGen(DestElementCurrent, SrcElementCurrent);
// Shift the address forward by one element.
llvm::Value *DestElementNext = Builder.CreateConstGEP1_32(
DestElementPHI, /*Idx0=*/1, "omp.arraycpy.dest.element");
llvm::Value *SrcElementNext = Builder.CreateConstGEP1_32(
SrcElementPHI, /*Idx0=*/1, "omp.arraycpy.src.element");
// Check whether we've reached the end.
llvm::Value *Done =
Builder.CreateICmpEQ(DestElementNext, DestEnd, "omp.arraycpy.done");
Builder.CreateCondBr(Done, DoneBB, BodyBB);
DestElementPHI->addIncoming(DestElementNext, Builder.GetInsertBlock());
SrcElementPHI->addIncoming(SrcElementNext, Builder.GetInsertBlock());
// Done.
EmitBlock(DoneBB, /*IsFinished=*/true);
}
void CodeGenFunction::EmitOMPCopy(QualType OriginalType, Address DestAddr,
Address SrcAddr, const VarDecl *DestVD,
const VarDecl *SrcVD, const Expr *Copy) {
if (OriginalType->isArrayType()) {
const auto *BO = dyn_cast<BinaryOperator>(Copy);
if (BO && BO->getOpcode() == BO_Assign) {
// Perform simple memcpy for simple copying.
LValue Dest = MakeAddrLValue(DestAddr, OriginalType);
LValue Src = MakeAddrLValue(SrcAddr, OriginalType);
EmitAggregateAssign(Dest, Src, OriginalType);
} else {
// For arrays with complex element types perform element by element
// copying.
EmitOMPAggregateAssign(
DestAddr, SrcAddr, OriginalType,
[this, Copy, SrcVD, DestVD](Address DestElement, Address SrcElement) {
// Working with the single array element, so have to remap
// destination and source variables to corresponding array
// elements.
CodeGenFunction::OMPPrivateScope Remap(*this);
Remap.addPrivate(DestVD, [DestElement]() { return DestElement; });
Remap.addPrivate(SrcVD, [SrcElement]() { return SrcElement; });
(void)Remap.Privatize();
EmitIgnoredExpr(Copy);
});
}
} else {
// Remap pseudo source variable to private copy.
CodeGenFunction::OMPPrivateScope Remap(*this);
Remap.addPrivate(SrcVD, [SrcAddr]() { return SrcAddr; });
Remap.addPrivate(DestVD, [DestAddr]() { return DestAddr; });
(void)Remap.Privatize();
// Emit copying of the whole variable.
EmitIgnoredExpr(Copy);
}
}
bool CodeGenFunction::EmitOMPFirstprivateClause(const OMPExecutableDirective &D,
OMPPrivateScope &PrivateScope) {
if (!HaveInsertPoint())
return false;
bool DeviceConstTarget =
getLangOpts().OpenMPIsDevice &&
isOpenMPTargetExecutionDirective(D.getDirectiveKind());
bool FirstprivateIsLastprivate = false;
llvm::DenseMap<const VarDecl *, OpenMPLastprivateModifier> Lastprivates;
for (const auto *C : D.getClausesOfKind<OMPLastprivateClause>()) {
for (const auto *D : C->varlists())
Lastprivates.try_emplace(
cast<VarDecl>(cast<DeclRefExpr>(D)->getDecl())->getCanonicalDecl(),
C->getKind());
}
llvm::DenseSet<const VarDecl *> EmittedAsFirstprivate;
llvm::SmallVector<OpenMPDirectiveKind, 4> CaptureRegions;
getOpenMPCaptureRegions(CaptureRegions, D.getDirectiveKind());
// Force emission of the firstprivate copy if the directive does not emit
// outlined function, like omp for, omp simd, omp distribute etc.
bool MustEmitFirstprivateCopy =
CaptureRegions.size() == 1 && CaptureRegions.back() == OMPD_unknown;
for (const auto *C : D.getClausesOfKind<OMPFirstprivateClause>()) {
const auto *IRef = C->varlist_begin();
const auto *InitsRef = C->inits().begin();
for (const Expr *IInit : C->private_copies()) {
const auto *OrigVD = cast<VarDecl>(cast<DeclRefExpr>(*IRef)->getDecl());
bool ThisFirstprivateIsLastprivate =
Lastprivates.count(OrigVD->getCanonicalDecl()) > 0;
const FieldDecl *FD = CapturedStmtInfo->lookup(OrigVD);
const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(IInit)->getDecl());
if (!MustEmitFirstprivateCopy && !ThisFirstprivateIsLastprivate && FD &&
!FD->getType()->isReferenceType() &&
(!VD || !VD->hasAttr<OMPAllocateDeclAttr>())) {
EmittedAsFirstprivate.insert(OrigVD->getCanonicalDecl());
++IRef;
++InitsRef;
continue;
}
// Do not emit copy for firstprivate constant variables in target regions,
// captured by reference.
if (DeviceConstTarget && OrigVD->getType().isConstant(getContext()) &&
FD && FD->getType()->isReferenceType() &&
(!VD || !VD->hasAttr<OMPAllocateDeclAttr>())) {
(void)CGM.getOpenMPRuntime().registerTargetFirstprivateCopy(*this,
OrigVD);
++IRef;
++InitsRef;
continue;
}
FirstprivateIsLastprivate =
FirstprivateIsLastprivate || ThisFirstprivateIsLastprivate;
if (EmittedAsFirstprivate.insert(OrigVD->getCanonicalDecl()).second) {
const auto *VDInit =
cast<VarDecl>(cast<DeclRefExpr>(*InitsRef)->getDecl());
bool IsRegistered;
DeclRefExpr DRE(getContext(), const_cast<VarDecl *>(OrigVD),
/*RefersToEnclosingVariableOrCapture=*/FD != nullptr,
(*IRef)->getType(), VK_LValue, (*IRef)->getExprLoc());
LValue OriginalLVal;
if (!FD) {
// Check if the firstprivate variable is just a constant value.
ConstantEmission CE = tryEmitAsConstant(&DRE);
if (CE && !CE.isReference()) {
// Constant value, no need to create a copy.
++IRef;
++InitsRef;
continue;
}
if (CE && CE.isReference()) {
OriginalLVal = CE.getReferenceLValue(*this, &DRE);
} else {
assert(!CE && "Expected non-constant firstprivate.");
OriginalLVal = EmitLValue(&DRE);
}
} else {
OriginalLVal = EmitLValue(&DRE);
}
QualType Type = VD->getType();
if (Type->isArrayType()) {
// Emit VarDecl with copy init for arrays.
// Get the address of the original variable captured in current
// captured region.
IsRegistered = PrivateScope.addPrivate(
OrigVD, [this, VD, Type, OriginalLVal, VDInit]() {
AutoVarEmission Emission = EmitAutoVarAlloca(*VD);
const Expr *Init = VD->getInit();
if (!isa<CXXConstructExpr>(Init) ||
isTrivialInitializer(Init)) {
// Perform simple memcpy.
LValue Dest =
MakeAddrLValue(Emission.getAllocatedAddress(), Type);
EmitAggregateAssign(Dest, OriginalLVal, Type);
} else {
EmitOMPAggregateAssign(
Emission.getAllocatedAddress(),
OriginalLVal.getAddress(*this), Type,
[this, VDInit, Init](Address DestElement,
Address SrcElement) {
// Clean up any temporaries needed by the
// initialization.
RunCleanupsScope InitScope(*this);
// Emit initialization for single element.
setAddrOfLocalVar(VDInit, SrcElement);
EmitAnyExprToMem(Init, DestElement,
Init->getType().getQualifiers(),
/*IsInitializer*/ false);
LocalDeclMap.erase(VDInit);
});
}
EmitAutoVarCleanups(Emission);
return Emission.getAllocatedAddress();
});
} else {
Address OriginalAddr = OriginalLVal.getAddress(*this);
IsRegistered =
PrivateScope.addPrivate(OrigVD, [this, VDInit, OriginalAddr, VD,
ThisFirstprivateIsLastprivate,
OrigVD, &Lastprivates, IRef]() {
// Emit private VarDecl with copy init.
// Remap temp VDInit variable to the address of the original
// variable (for proper handling of captured global variables).
setAddrOfLocalVar(VDInit, OriginalAddr);
EmitDecl(*VD);
LocalDeclMap.erase(VDInit);
if (ThisFirstprivateIsLastprivate &&
Lastprivates[OrigVD->getCanonicalDecl()] ==
OMPC_LASTPRIVATE_conditional) {
// Create/init special variable for lastprivate conditionals.
Address VDAddr =
CGM.getOpenMPRuntime().emitLastprivateConditionalInit(
*this, OrigVD);
llvm::Value *V = EmitLoadOfScalar(
MakeAddrLValue(GetAddrOfLocalVar(VD), (*IRef)->getType(),
AlignmentSource::Decl),
(*IRef)->getExprLoc());
EmitStoreOfScalar(V,
MakeAddrLValue(VDAddr, (*IRef)->getType(),
AlignmentSource::Decl));
LocalDeclMap.erase(VD);
setAddrOfLocalVar(VD, VDAddr);
return VDAddr;
}
return GetAddrOfLocalVar(VD);
});
}
assert(IsRegistered &&
"firstprivate var already registered as private");
// Silence the warning about unused variable.
(void)IsRegistered;
}
++IRef;
++InitsRef;
}
}
return FirstprivateIsLastprivate && !EmittedAsFirstprivate.empty();
}
void CodeGenFunction::EmitOMPPrivateClause(
const OMPExecutableDirective &D,
CodeGenFunction::OMPPrivateScope &PrivateScope) {
if (!HaveInsertPoint())
return;
llvm::DenseSet<const VarDecl *> EmittedAsPrivate;
for (const auto *C : D.getClausesOfKind<OMPPrivateClause>()) {
auto IRef = C->varlist_begin();
for (const Expr *IInit : C->private_copies()) {
const auto *OrigVD = cast<VarDecl>(cast<DeclRefExpr>(*IRef)->getDecl());
if (EmittedAsPrivate.insert(OrigVD->getCanonicalDecl()).second) {
const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(IInit)->getDecl());
bool IsRegistered = PrivateScope.addPrivate(OrigVD, [this, VD]() {
// Emit private VarDecl with copy init.
EmitDecl(*VD);
return GetAddrOfLocalVar(VD);
});
assert(IsRegistered && "private var already registered as private");
// Silence the warning about unused variable.
(void)IsRegistered;
}
++IRef;
}
}
}
bool CodeGenFunction::EmitOMPCopyinClause(const OMPExecutableDirective &D) {
if (!HaveInsertPoint())
return false;
// threadprivate_var1 = master_threadprivate_var1;
// operator=(threadprivate_var2, master_threadprivate_var2);
// ...
// __kmpc_barrier(&loc, global_tid);
llvm::DenseSet<const VarDecl *> CopiedVars;
llvm::BasicBlock *CopyBegin = nullptr, *CopyEnd = nullptr;
for (const auto *C : D.getClausesOfKind<OMPCopyinClause>()) {
auto IRef = C->varlist_begin();
auto ISrcRef = C->source_exprs().begin();
auto IDestRef = C->destination_exprs().begin();
for (const Expr *AssignOp : C->assignment_ops()) {
const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(*IRef)->getDecl());
QualType Type = VD->getType();
if (CopiedVars.insert(VD->getCanonicalDecl()).second) {
// Get the address of the master variable. If we are emitting code with
// TLS support, the address is passed from the master as field in the
// captured declaration.
Address MasterAddr = Address::invalid();
if (getLangOpts().OpenMPUseTLS &&
getContext().getTargetInfo().isTLSSupported()) {
assert(CapturedStmtInfo->lookup(VD) &&
"Copyin threadprivates should have been captured!");
DeclRefExpr DRE(getContext(), const_cast<VarDecl *>(VD), true,
(*IRef)->getType(), VK_LValue, (*IRef)->getExprLoc());
MasterAddr = EmitLValue(&DRE).getAddress(*this);
LocalDeclMap.erase(VD);
} else {
MasterAddr =
Address(VD->isStaticLocal() ? CGM.getStaticLocalDeclAddress(VD)
: CGM.GetAddrOfGlobal(VD),
getContext().getDeclAlign(VD));
}
// Get the address of the threadprivate variable.
Address PrivateAddr = EmitLValue(*IRef).getAddress(*this);
if (CopiedVars.size() == 1) {
// At first check if current thread is a master thread. If it is, no
// need to copy data.
CopyBegin = createBasicBlock("copyin.not.master");
CopyEnd = createBasicBlock("copyin.not.master.end");
// TODO: Avoid ptrtoint conversion.
auto *MasterAddrInt =
Builder.CreatePtrToInt(MasterAddr.getPointer(), CGM.IntPtrTy);
auto *PrivateAddrInt =
Builder.CreatePtrToInt(PrivateAddr.getPointer(), CGM.IntPtrTy);
Builder.CreateCondBr(
Builder.CreateICmpNE(MasterAddrInt, PrivateAddrInt), CopyBegin,
CopyEnd);
EmitBlock(CopyBegin);
}
const auto *SrcVD =
cast<VarDecl>(cast<DeclRefExpr>(*ISrcRef)->getDecl());
const auto *DestVD =
cast<VarDecl>(cast<DeclRefExpr>(*IDestRef)->getDecl());
EmitOMPCopy(Type, PrivateAddr, MasterAddr, DestVD, SrcVD, AssignOp);
}
++IRef;
++ISrcRef;
++IDestRef;
}
}
if (CopyEnd) {
// Exit out of copying procedure for non-master thread.
EmitBlock(CopyEnd, /*IsFinished=*/true);
return true;
}
return false;
}
bool CodeGenFunction::EmitOMPLastprivateClauseInit(
const OMPExecutableDirective &D, OMPPrivateScope &PrivateScope) {
if (!HaveInsertPoint())
return false;
bool HasAtLeastOneLastprivate = false;
llvm::DenseSet<const VarDecl *> SIMDLCVs;
if (isOpenMPSimdDirective(D.getDirectiveKind())) {
const auto *LoopDirective = cast<OMPLoopDirective>(&D);
for (const Expr *C : LoopDirective->counters()) {
SIMDLCVs.insert(
cast<VarDecl>(cast<DeclRefExpr>(C)->getDecl())->getCanonicalDecl());
}
}
llvm::DenseSet<const VarDecl *> AlreadyEmittedVars;
for (const auto *C : D.getClausesOfKind<OMPLastprivateClause>()) {
HasAtLeastOneLastprivate = true;
if (isOpenMPTaskLoopDirective(D.getDirectiveKind()) &&
!getLangOpts().OpenMPSimd)
break;
const auto *IRef = C->varlist_begin();
const auto *IDestRef = C->destination_exprs().begin();
for (const Expr *IInit : C->private_copies()) {
// Keep the address of the original variable for future update at the end
// of the loop.
const auto *OrigVD = cast<VarDecl>(cast<DeclRefExpr>(*IRef)->getDecl());
// Taskloops do not require additional initialization, it is done in
// runtime support library.
if (AlreadyEmittedVars.insert(OrigVD->getCanonicalDecl()).second) {
const auto *DestVD =
cast<VarDecl>(cast<DeclRefExpr>(*IDestRef)->getDecl());
PrivateScope.addPrivate(DestVD, [this, OrigVD, IRef]() {
DeclRefExpr DRE(getContext(), const_cast<VarDecl *>(OrigVD),
/*RefersToEnclosingVariableOrCapture=*/
CapturedStmtInfo->lookup(OrigVD) != nullptr,
(*IRef)->getType(), VK_LValue, (*IRef)->getExprLoc());
return EmitLValue(&DRE).getAddress(*this);
});
// Check if the variable is also a firstprivate: in this case IInit is
// not generated. Initialization of this variable will happen in codegen
// for 'firstprivate' clause.
if (IInit && !SIMDLCVs.count(OrigVD->getCanonicalDecl())) {
const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(IInit)->getDecl());
bool IsRegistered = PrivateScope.addPrivate(OrigVD, [this, VD, C,
OrigVD]() {
if (C->getKind() == OMPC_LASTPRIVATE_conditional) {
Address VDAddr =
CGM.getOpenMPRuntime().emitLastprivateConditionalInit(*this,
OrigVD);
setAddrOfLocalVar(VD, VDAddr);
return VDAddr;
}
// Emit private VarDecl with copy init.
EmitDecl(*VD);
return GetAddrOfLocalVar(VD);
});
assert(IsRegistered &&
"lastprivate var already registered as private");
(void)IsRegistered;
}
}
++IRef;
++IDestRef;
}
}
return HasAtLeastOneLastprivate;
}
void CodeGenFunction::EmitOMPLastprivateClauseFinal(
const OMPExecutableDirective &D, bool NoFinals,
llvm::Value *IsLastIterCond) {
if (!HaveInsertPoint())
return;
// Emit following code:
// if (<IsLastIterCond>) {
// orig_var1 = private_orig_var1;
// ...
// orig_varn = private_orig_varn;
// }
llvm::BasicBlock *ThenBB = nullptr;
llvm::BasicBlock *DoneBB = nullptr;
if (IsLastIterCond) {
// Emit implicit barrier if at least one lastprivate conditional is found
// and this is not a simd mode.
if (!getLangOpts().OpenMPSimd &&
llvm::any_of(D.getClausesOfKind<OMPLastprivateClause>(),
[](const OMPLastprivateClause *C) {
return C->getKind() == OMPC_LASTPRIVATE_conditional;
})) {
CGM.getOpenMPRuntime().emitBarrierCall(*this, D.getBeginLoc(),
OMPD_unknown,
/*EmitChecks=*/false,
/*ForceSimpleCall=*/true);
}
ThenBB = createBasicBlock(".omp.lastprivate.then");
DoneBB = createBasicBlock(".omp.lastprivate.done");
Builder.CreateCondBr(IsLastIterCond, ThenBB, DoneBB);
EmitBlock(ThenBB);
}
llvm::DenseSet<const VarDecl *> AlreadyEmittedVars;
llvm::DenseMap<const VarDecl *, const Expr *> LoopCountersAndUpdates;
if (const auto *LoopDirective = dyn_cast<OMPLoopDirective>(&D)) {
auto IC = LoopDirective->counters().begin();
for (const Expr *F : LoopDirective->finals()) {
const auto *D =
cast<VarDecl>(cast<DeclRefExpr>(*IC)->getDecl())->getCanonicalDecl();
if (NoFinals)
AlreadyEmittedVars.insert(D);
else
LoopCountersAndUpdates[D] = F;
++IC;
}
}
for (const auto *C : D.getClausesOfKind<OMPLastprivateClause>()) {
auto IRef = C->varlist_begin();
auto ISrcRef = C->source_exprs().begin();
auto IDestRef = C->destination_exprs().begin();
for (const Expr *AssignOp : C->assignment_ops()) {
const auto *PrivateVD =
cast<VarDecl>(cast<DeclRefExpr>(*IRef)->getDecl());
QualType Type = PrivateVD->getType();
const auto *CanonicalVD = PrivateVD->getCanonicalDecl();
if (AlreadyEmittedVars.insert(CanonicalVD).second) {
// If lastprivate variable is a loop control variable for loop-based
// directive, update its value before copyin back to original
// variable.
if (const Expr *FinalExpr = LoopCountersAndUpdates.lookup(CanonicalVD))
EmitIgnoredExpr(FinalExpr);
const auto *SrcVD =
cast<VarDecl>(cast<DeclRefExpr>(*ISrcRef)->getDecl());
const auto *DestVD =
cast<VarDecl>(cast<DeclRefExpr>(*IDestRef)->getDecl());
// Get the address of the private variable.
Address PrivateAddr = GetAddrOfLocalVar(PrivateVD);
if (const auto *RefTy = PrivateVD->getType()->getAs<ReferenceType>())
PrivateAddr =
Address(Builder.CreateLoad(PrivateAddr),
CGM.getNaturalTypeAlignment(RefTy->getPointeeType()));
// Store the last value to the private copy in the last iteration.
if (C->getKind() == OMPC_LASTPRIVATE_conditional)
CGM.getOpenMPRuntime().emitLastprivateConditionalFinalUpdate(
*this, MakeAddrLValue(PrivateAddr, (*IRef)->getType()), PrivateVD,
(*IRef)->getExprLoc());
// Get the address of the original variable.
Address OriginalAddr = GetAddrOfLocalVar(DestVD);
EmitOMPCopy(Type, OriginalAddr, PrivateAddr, DestVD, SrcVD, AssignOp);
}
++IRef;
++ISrcRef;
++IDestRef;
}
if (const Expr *PostUpdate = C->getPostUpdateExpr())
EmitIgnoredExpr(PostUpdate);
}
if (IsLastIterCond)
EmitBlock(DoneBB, /*IsFinished=*/true);
}
void CodeGenFunction::EmitOMPReductionClauseInit(
const OMPExecutableDirective &D,
CodeGenFunction::OMPPrivateScope &PrivateScope, bool ForInscan) {
if (!HaveInsertPoint())
return;
SmallVector<const Expr *, 4> Shareds;
SmallVector<const Expr *, 4> Privates;
SmallVector<const Expr *, 4> ReductionOps;
SmallVector<const Expr *, 4> LHSs;
SmallVector<const Expr *, 4> RHSs;
OMPTaskDataTy Data;
SmallVector<const Expr *, 4> TaskLHSs;
SmallVector<const Expr *, 4> TaskRHSs;
for (const auto *C : D.getClausesOfKind<OMPReductionClause>()) {
if (ForInscan != (C->getModifier() == OMPC_REDUCTION_inscan))
continue;
Shareds.append(C->varlist_begin(), C->varlist_end());
Privates.append(C->privates().begin(), C->privates().end());
ReductionOps.append(C->reduction_ops().begin(), C->reduction_ops().end());
LHSs.append(C->lhs_exprs().begin(), C->lhs_exprs().end());
RHSs.append(C->rhs_exprs().begin(), C->rhs_exprs().end());
if (C->getModifier() == OMPC_REDUCTION_task) {
Data.ReductionVars.append(C->privates().begin(), C->privates().end());
Data.ReductionOrigs.append(C->varlist_begin(), C->varlist_end());
Data.ReductionCopies.append(C->privates().begin(), C->privates().end());
Data.ReductionOps.append(C->reduction_ops().begin(),
C->reduction_ops().end());
TaskLHSs.append(C->lhs_exprs().begin(), C->lhs_exprs().end());
TaskRHSs.append(C->rhs_exprs().begin(), C->rhs_exprs().end());
}
}
ReductionCodeGen RedCG(Shareds, Shareds, Privates, ReductionOps);
unsigned Count = 0;
auto *ILHS = LHSs.begin();
auto *IRHS = RHSs.begin();
auto *IPriv = Privates.begin();
for (const Expr *IRef : Shareds) {
const auto *PrivateVD = cast<VarDecl>(cast<DeclRefExpr>(*IPriv)->getDecl());
// Emit private VarDecl with reduction init.
RedCG.emitSharedOrigLValue(*this, Count);
RedCG.emitAggregateType(*this, Count);
AutoVarEmission Emission = EmitAutoVarAlloca(*PrivateVD);
RedCG.emitInitialization(*this, Count, Emission.getAllocatedAddress(),
RedCG.getSharedLValue(Count),
[&Emission](CodeGenFunction &CGF) {
CGF.EmitAutoVarInit(Emission);
return true;
});
EmitAutoVarCleanups(Emission);
Address BaseAddr = RedCG.adjustPrivateAddress(
*this, Count, Emission.getAllocatedAddress());
bool IsRegistered = PrivateScope.addPrivate(
RedCG.getBaseDecl(Count), [BaseAddr]() { return BaseAddr; });
assert(IsRegistered && "private var already registered as private");
// Silence the warning about unused variable.
(void)IsRegistered;
const auto *LHSVD = cast<VarDecl>(cast<DeclRefExpr>(*ILHS)->getDecl());
const auto *RHSVD = cast<VarDecl>(cast<DeclRefExpr>(*IRHS)->getDecl());
QualType Type = PrivateVD->getType();
bool isaOMPArraySectionExpr = isa<OMPArraySectionExpr>(IRef);
if (isaOMPArraySectionExpr && Type->isVariablyModifiedType()) {
// Store the address of the original variable associated with the LHS
// implicit variable.
PrivateScope.addPrivate(LHSVD, [&RedCG, Count, this]() {
return RedCG.getSharedLValue(Count).getAddress(*this);
});
PrivateScope.addPrivate(
RHSVD, [this, PrivateVD]() { return GetAddrOfLocalVar(PrivateVD); });
} else if ((isaOMPArraySectionExpr && Type->isScalarType()) ||
isa<ArraySubscriptExpr>(IRef)) {
// Store the address of the original variable associated with the LHS
// implicit variable.
PrivateScope.addPrivate(LHSVD, [&RedCG, Count, this]() {
return RedCG.getSharedLValue(Count).getAddress(*this);
});
PrivateScope.addPrivate(RHSVD, [this, PrivateVD, RHSVD]() {
return Builder.CreateElementBitCast(GetAddrOfLocalVar(PrivateVD),
ConvertTypeForMem(RHSVD->getType()),
"rhs.begin");
});
} else {
QualType Type = PrivateVD->getType();
bool IsArray = getContext().getAsArrayType(Type) != nullptr;
Address OriginalAddr = RedCG.getSharedLValue(Count).getAddress(*this);
// Store the address of the original variable associated with the LHS
// implicit variable.
if (IsArray) {
OriginalAddr = Builder.CreateElementBitCast(
OriginalAddr, ConvertTypeForMem(LHSVD->getType()), "lhs.begin");
}
PrivateScope.addPrivate(LHSVD, [OriginalAddr]() { return OriginalAddr; });
PrivateScope.addPrivate(
RHSVD, [this, PrivateVD, RHSVD, IsArray]() {
return IsArray
? Builder.CreateElementBitCast(
GetAddrOfLocalVar(PrivateVD),
ConvertTypeForMem(RHSVD->getType()), "rhs.begin")
: GetAddrOfLocalVar(PrivateVD);
});
}
++ILHS;
++IRHS;
++IPriv;
++Count;
}
if (!Data.ReductionVars.empty()) {
Data.IsReductionWithTaskMod = true;
Data.IsWorksharingReduction =
isOpenMPWorksharingDirective(D.getDirectiveKind());
llvm::Value *ReductionDesc = CGM.getOpenMPRuntime().emitTaskReductionInit(
*this, D.getBeginLoc(), TaskLHSs, TaskRHSs, Data);
const Expr *TaskRedRef = nullptr;
switch (D.getDirectiveKind()) {
case OMPD_parallel:
TaskRedRef = cast<OMPParallelDirective>(D).getTaskReductionRefExpr();
break;
case OMPD_for:
TaskRedRef = cast<OMPForDirective>(D).getTaskReductionRefExpr();
break;
case OMPD_sections:
TaskRedRef = cast<OMPSectionsDirective>(D).getTaskReductionRefExpr();
break;
case OMPD_parallel_for:
TaskRedRef = cast<OMPParallelForDirective>(D).getTaskReductionRefExpr();
break;
case OMPD_parallel_master:
TaskRedRef =
cast<OMPParallelMasterDirective>(D).getTaskReductionRefExpr();
break;
case OMPD_parallel_sections:
TaskRedRef =
cast<OMPParallelSectionsDirective>(D).getTaskReductionRefExpr();
break;
case OMPD_target_parallel:
TaskRedRef =
cast<OMPTargetParallelDirective>(D).getTaskReductionRefExpr();
break;
case OMPD_target_parallel_for:
TaskRedRef =
cast<OMPTargetParallelForDirective>(D).getTaskReductionRefExpr();
break;
case OMPD_distribute_parallel_for:
TaskRedRef =
cast<OMPDistributeParallelForDirective>(D).getTaskReductionRefExpr();
break;
case OMPD_teams_distribute_parallel_for:
TaskRedRef = cast<OMPTeamsDistributeParallelForDirective>(D)
.getTaskReductionRefExpr();
break;
case OMPD_target_teams_distribute_parallel_for:
TaskRedRef = cast<OMPTargetTeamsDistributeParallelForDirective>(D)
.getTaskReductionRefExpr();
break;
case OMPD_simd:
case OMPD_for_simd:
case OMPD_section:
case OMPD_single:
case OMPD_master:
case OMPD_critical:
case OMPD_parallel_for_simd:
case OMPD_task:
case OMPD_taskyield:
case OMPD_barrier:
case OMPD_taskwait:
case OMPD_taskgroup:
case OMPD_flush:
case OMPD_depobj:
case OMPD_scan:
case OMPD_ordered:
case OMPD_atomic:
case OMPD_teams:
case OMPD_target:
case OMPD_cancellation_point:
case OMPD_cancel:
case OMPD_target_data:
case OMPD_target_enter_data:
case OMPD_target_exit_data:
case OMPD_taskloop:
case OMPD_taskloop_simd:
case OMPD_master_taskloop:
case OMPD_master_taskloop_simd:
case OMPD_parallel_master_taskloop:
case OMPD_parallel_master_taskloop_simd:
case OMPD_distribute:
case OMPD_target_update:
case OMPD_distribute_parallel_for_simd:
case OMPD_distribute_simd:
case OMPD_target_parallel_for_simd:
case OMPD_target_simd:
case OMPD_teams_distribute:
case OMPD_teams_distribute_simd:
case OMPD_teams_distribute_parallel_for_simd:
case OMPD_target_teams:
case OMPD_target_teams_distribute:
case OMPD_target_teams_distribute_parallel_for_simd:
case OMPD_target_teams_distribute_simd:
case OMPD_declare_target:
case OMPD_end_declare_target:
case OMPD_threadprivate:
case OMPD_allocate:
case OMPD_declare_reduction:
case OMPD_declare_mapper:
case OMPD_declare_simd:
case OMPD_requires:
case OMPD_declare_variant:
case OMPD_begin_declare_variant:
case OMPD_end_declare_variant:
case OMPD_unknown:
default:
llvm_unreachable("Enexpected directive with task reductions.");
}
const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(TaskRedRef)->getDecl());
EmitVarDecl(*VD);
EmitStoreOfScalar(ReductionDesc, GetAddrOfLocalVar(VD),
/*Volatile=*/false, TaskRedRef->getType());
}
}
void CodeGenFunction::EmitOMPReductionClauseFinal(
const OMPExecutableDirective &D, const OpenMPDirectiveKind ReductionKind) {
if (!HaveInsertPoint())
return;
llvm::SmallVector<const Expr *, 8> Privates;
llvm::SmallVector<const Expr *, 8> LHSExprs;
llvm::SmallVector<const Expr *, 8> RHSExprs;
llvm::SmallVector<const Expr *, 8> ReductionOps;
bool HasAtLeastOneReduction = false;
bool IsReductionWithTaskMod = false;
for (const auto *C : D.getClausesOfKind<OMPReductionClause>()) {
// Do not emit for inscan reductions.
if (C->getModifier() == OMPC_REDUCTION_inscan)
continue;
HasAtLeastOneReduction = true;
Privates.append(C->privates().begin(), C->privates().end());
LHSExprs.append(C->lhs_exprs().begin(), C->lhs_exprs().end());
RHSExprs.append(C->rhs_exprs().begin(), C->rhs_exprs().end());
ReductionOps.append(C->reduction_ops().begin(), C->reduction_ops().end());
IsReductionWithTaskMod =
IsReductionWithTaskMod || C->getModifier() == OMPC_REDUCTION_task;
}
if (HasAtLeastOneReduction) {
if (IsReductionWithTaskMod) {
CGM.getOpenMPRuntime().emitTaskReductionFini(
*this, D.getBeginLoc(),
isOpenMPWorksharingDirective(D.getDirectiveKind()));
}
bool WithNowait = D.getSingleClause<OMPNowaitClause>() ||
isOpenMPParallelDirective(D.getDirectiveKind()) ||
ReductionKind == OMPD_simd;
bool SimpleReduction = ReductionKind == OMPD_simd;
// Emit nowait reduction if nowait clause is present or directive is a
// parallel directive (it always has implicit barrier).
CGM.getOpenMPRuntime().emitReduction(
*this, D.getEndLoc(), Privates, LHSExprs, RHSExprs, ReductionOps,
{WithNowait, SimpleReduction, ReductionKind});
}
}
static void emitPostUpdateForReductionClause(
CodeGenFunction &CGF, const OMPExecutableDirective &D,
const llvm::function_ref<llvm::Value *(CodeGenFunction &)> CondGen) {
if (!CGF.HaveInsertPoint())
return;
llvm::BasicBlock *DoneBB = nullptr;
for (const auto *C : D.getClausesOfKind<OMPReductionClause>()) {
if (const Expr *PostUpdate = C->getPostUpdateExpr()) {
if (!DoneBB) {
if (llvm::Value *Cond = CondGen(CGF)) {
// If the first post-update expression is found, emit conditional
// block if it was requested.
llvm::BasicBlock *ThenBB = CGF.createBasicBlock(".omp.reduction.pu");
DoneBB = CGF.createBasicBlock(".omp.reduction.pu.done");
CGF.Builder.CreateCondBr(Cond, ThenBB, DoneBB);
CGF.EmitBlock(ThenBB);
}
}
CGF.EmitIgnoredExpr(PostUpdate);
}
}
if (DoneBB)
CGF.EmitBlock(DoneBB, /*IsFinished=*/true);
}
namespace {
/// Codegen lambda for appending distribute lower and upper bounds to outlined
/// parallel function. This is necessary for combined constructs such as
/// 'distribute parallel for'
typedef llvm::function_ref<void(CodeGenFunction &,
const OMPExecutableDirective &,
llvm::SmallVectorImpl<llvm::Value *> &)>
CodeGenBoundParametersTy;
} // anonymous namespace
static void
checkForLastprivateConditionalUpdate(CodeGenFunction &CGF,
const OMPExecutableDirective &S) {
if (CGF.getLangOpts().OpenMP < 50)
return;
llvm::DenseSet<CanonicalDeclPtr<const VarDecl>> PrivateDecls;
for (const auto *C : S.getClausesOfKind<OMPReductionClause>()) {
for (const Expr *Ref : C->varlists()) {
if (!Ref->getType()->isScalarType())
continue;
const auto *DRE = dyn_cast<DeclRefExpr>(Ref->IgnoreParenImpCasts());
if (!DRE)
continue;
PrivateDecls.insert(cast<VarDecl>(DRE->getDecl()));
CGF.CGM.getOpenMPRuntime().checkAndEmitLastprivateConditional(CGF, Ref);
}
}
for (const auto *C : S.getClausesOfKind<OMPLastprivateClause>()) {
for (const Expr *Ref : C->varlists()) {
if (!Ref->getType()->isScalarType())
continue;
const auto *DRE = dyn_cast<DeclRefExpr>(Ref->IgnoreParenImpCasts());
if (!DRE)
continue;
PrivateDecls.insert(cast<VarDecl>(DRE->getDecl()));
CGF.CGM.getOpenMPRuntime().checkAndEmitLastprivateConditional(CGF, Ref);
}
}
for (const auto *C : S.getClausesOfKind<OMPLinearClause>()) {
for (const Expr *Ref : C->varlists()) {
if (!Ref->getType()->isScalarType())
continue;
const auto *DRE = dyn_cast<DeclRefExpr>(Ref->IgnoreParenImpCasts());
if (!DRE)
continue;
PrivateDecls.insert(cast<VarDecl>(DRE->getDecl()));
CGF.CGM.getOpenMPRuntime().checkAndEmitLastprivateConditional(CGF, Ref);
}
}
// Privates should ne analyzed since they are not captured at all.
// Task reductions may be skipped - tasks are ignored.
// Firstprivates do not return value but may be passed by reference - no need
// to check for updated lastprivate conditional.
for (const auto *C : S.getClausesOfKind<OMPFirstprivateClause>()) {
for (const Expr *Ref : C->varlists()) {
if (!Ref->getType()->isScalarType())
continue;
const auto *DRE = dyn_cast<DeclRefExpr>(Ref->IgnoreParenImpCasts());
if (!DRE)
continue;
PrivateDecls.insert(cast<VarDecl>(DRE->getDecl()));
}
}
CGF.CGM.getOpenMPRuntime().checkAndEmitSharedLastprivateConditional(
CGF, S, PrivateDecls);
}
static void emitCommonOMPParallelDirective(
CodeGenFunction &CGF, const OMPExecutableDirective &S,
OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen,
const CodeGenBoundParametersTy &CodeGenBoundParameters) {
const CapturedStmt *CS = S.getCapturedStmt(OMPD_parallel);
llvm::Function *OutlinedFn =
CGF.CGM.getOpenMPRuntime().emitParallelOutlinedFunction(
S, *CS->getCapturedDecl()->param_begin(), InnermostKind, CodeGen);
if (const auto *NumThreadsClause = S.getSingleClause<OMPNumThreadsClause>()) {
CodeGenFunction::RunCleanupsScope NumThreadsScope(CGF);
llvm::Value *NumThreads =
CGF.EmitScalarExpr(NumThreadsClause->getNumThreads(),
/*IgnoreResultAssign=*/true);
CGF.CGM.getOpenMPRuntime().emitNumThreadsClause(
CGF, NumThreads, NumThreadsClause->getBeginLoc());
}
if (const auto *ProcBindClause = S.getSingleClause<OMPProcBindClause>()) {
CodeGenFunction::RunCleanupsScope ProcBindScope(CGF);
CGF.CGM.getOpenMPRuntime().emitProcBindClause(
CGF, ProcBindClause->getProcBindKind(), ProcBindClause->getBeginLoc());
}
const Expr *IfCond = nullptr;
for (const auto *C : S.getClausesOfKind<OMPIfClause>()) {
if (C->getNameModifier() == OMPD_unknown ||
C->getNameModifier() == OMPD_parallel) {
IfCond = C->getCondition();
break;
}
}
OMPParallelScope Scope(CGF, S);
llvm::SmallVector<llvm::Value *, 16> CapturedVars;
// Combining 'distribute' with 'for' requires sharing each 'distribute' chunk
// lower and upper bounds with the pragma 'for' chunking mechanism.
// The following lambda takes care of appending the lower and upper bound
// parameters when necessary
CodeGenBoundParameters(CGF, S, CapturedVars);
CGF.GenerateOpenMPCapturedVars(*CS, CapturedVars);
CGF.CGM.getOpenMPRuntime().emitParallelCall(CGF, S.getBeginLoc(), OutlinedFn,
CapturedVars, IfCond);
}
static bool isAllocatableDecl(const VarDecl *VD) {
const VarDecl *CVD = VD->getCanonicalDecl();
if (!CVD->hasAttr<OMPAllocateDeclAttr>())
return false;
const auto *AA = CVD->getAttr<OMPAllocateDeclAttr>();
// Use the default allocation.
return !((AA->getAllocatorType() == OMPAllocateDeclAttr::OMPDefaultMemAlloc ||
AA->getAllocatorType() == OMPAllocateDeclAttr::OMPNullMemAlloc) &&
!AA->getAllocator());
}
static void emitEmptyBoundParameters(CodeGenFunction &,
const OMPExecutableDirective &,
llvm::SmallVectorImpl<llvm::Value *> &) {}
Address CodeGenFunction::OMPBuilderCBHelpers::getAddressOfLocalVariable(
CodeGenFunction &CGF, const VarDecl *VD) {
CodeGenModule &CGM = CGF.CGM;
auto &OMPBuilder = CGM.getOpenMPRuntime().getOMPBuilder();
if (!VD)
return Address::invalid();
const VarDecl *CVD = VD->getCanonicalDecl();
if (!isAllocatableDecl(CVD))
return Address::invalid();
llvm::Value *Size;
CharUnits Align = CGM.getContext().getDeclAlign(CVD);
if (CVD->getType()->isVariablyModifiedType()) {
Size = CGF.getTypeSize(CVD->getType());
// Align the size: ((size + align - 1) / align) * align
Size = CGF.Builder.CreateNUWAdd(
Size, CGM.getSize(Align - CharUnits::fromQuantity(1)));
Size = CGF.Builder.CreateUDiv(Size, CGM.getSize(Align));
Size = CGF.Builder.CreateNUWMul(Size, CGM.getSize(Align));
} else {
CharUnits Sz = CGM.getContext().getTypeSizeInChars(CVD->getType());
Size = CGM.getSize(Sz.alignTo(Align));
}
const auto *AA = CVD->getAttr<OMPAllocateDeclAttr>();
assert(AA->getAllocator() &&
"Expected allocator expression for non-default allocator.");
llvm::Value *Allocator = CGF.EmitScalarExpr(AA->getAllocator());
// According to the standard, the original allocator type is a enum (integer).
// Convert to pointer type, if required.
if (Allocator->getType()->isIntegerTy())
Allocator = CGF.Builder.CreateIntToPtr(Allocator, CGM.VoidPtrTy);
else if (Allocator->getType()->isPointerTy())
Allocator = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(Allocator,
CGM.VoidPtrTy);
llvm::Value *Addr = OMPBuilder.createOMPAlloc(
CGF.Builder, Size, Allocator,
getNameWithSeparators({CVD->getName(), ".void.addr"}, ".", "."));
llvm::CallInst *FreeCI =
OMPBuilder.createOMPFree(CGF.Builder, Addr, Allocator);
CGF.EHStack.pushCleanup<OMPAllocateCleanupTy>(NormalAndEHCleanup, FreeCI);
Addr = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
Addr,
CGF.ConvertTypeForMem(CGM.getContext().getPointerType(CVD->getType())),
getNameWithSeparators({CVD->getName(), ".addr"}, ".", "."));
return Address(Addr, Align);
}
Address CodeGenFunction::OMPBuilderCBHelpers::getAddrOfThreadPrivate(
CodeGenFunction &CGF, const VarDecl *VD, Address VDAddr,
SourceLocation Loc) {
CodeGenModule &CGM = CGF.CGM;
if (CGM.getLangOpts().OpenMPUseTLS &&
CGM.getContext().getTargetInfo().isTLSSupported())
return VDAddr;
llvm::OpenMPIRBuilder &OMPBuilder = CGM.getOpenMPRuntime().getOMPBuilder();
llvm::Type *VarTy = VDAddr.getElementType();
llvm::Value *Data =
CGF.Builder.CreatePointerCast(VDAddr.getPointer(), CGM.Int8PtrTy);
llvm::ConstantInt *Size = CGM.getSize(CGM.GetTargetTypeStoreSize(VarTy));
std::string Suffix = getNameWithSeparators({"cache", ""});
llvm::Twine CacheName = Twine(CGM.getMangledName(VD)).concat(Suffix);
llvm::CallInst *ThreadPrivateCacheCall =
OMPBuilder.createCachedThreadPrivate(CGF.Builder, Data, Size, CacheName);
return Address(ThreadPrivateCacheCall, VDAddr.getAlignment());
}
std::string CodeGenFunction::OMPBuilderCBHelpers::getNameWithSeparators(
ArrayRef<StringRef> Parts, StringRef FirstSeparator, StringRef Separator) {
SmallString<128> Buffer;
llvm::raw_svector_ostream OS(Buffer);
StringRef Sep = FirstSeparator;
for (StringRef Part : Parts) {
OS << Sep << Part;
Sep = Separator;
}
return OS.str().str();
}
void CodeGenFunction::EmitOMPParallelDirective(const OMPParallelDirective &S) {
if (CGM.getLangOpts().OpenMPIRBuilder) {
llvm::OpenMPIRBuilder &OMPBuilder = CGM.getOpenMPRuntime().getOMPBuilder();
// Check if we have any if clause associated with the directive.
llvm::Value *IfCond = nullptr;
if (const auto *C = S.getSingleClause<OMPIfClause>())
IfCond = EmitScalarExpr(C->getCondition(),
/*IgnoreResultAssign=*/true);
llvm::Value *NumThreads = nullptr;
if (const auto *NumThreadsClause = S.getSingleClause<OMPNumThreadsClause>())
NumThreads = EmitScalarExpr(NumThreadsClause->getNumThreads(),
/*IgnoreResultAssign=*/true);
ProcBindKind ProcBind = OMP_PROC_BIND_default;
if (const auto *ProcBindClause = S.getSingleClause<OMPProcBindClause>())
ProcBind = ProcBindClause->getProcBindKind();
using InsertPointTy = llvm::OpenMPIRBuilder::InsertPointTy;
// The cleanup callback that finalizes all variabels at the given location,
// thus calls destructors etc.
auto FiniCB = [this](InsertPointTy IP) {
OMPBuilderCBHelpers::FinalizeOMPRegion(*this, IP);
};
// Privatization callback that performs appropriate action for
// shared/private/firstprivate/lastprivate/copyin/... variables.
//
// TODO: This defaults to shared right now.
auto PrivCB = [](InsertPointTy AllocaIP, InsertPointTy CodeGenIP,
llvm::Value &, llvm::Value &Val, llvm::Value *&ReplVal) {
// The next line is appropriate only for variables (Val) with the
// data-sharing attribute "shared".
ReplVal = &Val;
return CodeGenIP;
};
const CapturedStmt *CS = S.getCapturedStmt(OMPD_parallel);
const Stmt *ParallelRegionBodyStmt = CS->getCapturedStmt();
auto BodyGenCB = [ParallelRegionBodyStmt,
this](InsertPointTy AllocaIP, InsertPointTy CodeGenIP,
llvm::BasicBlock &ContinuationBB) {
OMPBuilderCBHelpers::OutlinedRegionBodyRAII ORB(*this, AllocaIP,
ContinuationBB);
OMPBuilderCBHelpers::EmitOMPRegionBody(*this, ParallelRegionBodyStmt,
CodeGenIP, ContinuationBB);
};
CGCapturedStmtInfo CGSI(*CS, CR_OpenMP);
CodeGenFunction::CGCapturedStmtRAII CapInfoRAII(*this, &CGSI);
llvm::OpenMPIRBuilder::InsertPointTy AllocaIP(
AllocaInsertPt->getParent(), AllocaInsertPt->getIterator());
Builder.restoreIP(
OMPBuilder.createParallel(Builder, AllocaIP, BodyGenCB, PrivCB, FiniCB,
IfCond, NumThreads, ProcBind, S.hasCancel()));
return;
}
// Emit parallel region as a standalone region.
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
Action.Enter(CGF);
OMPPrivateScope PrivateScope(CGF);
bool Copyins = CGF.EmitOMPCopyinClause(S);
(void)CGF.EmitOMPFirstprivateClause(S, PrivateScope);
if (Copyins) {
// Emit implicit barrier to synchronize threads and avoid data races on
// propagation master's thread values of threadprivate variables to local
// instances of that variables of all other implicit threads.
CGF.CGM.getOpenMPRuntime().emitBarrierCall(
CGF, S.getBeginLoc(), OMPD_unknown, /*EmitChecks=*/false,
/*ForceSimpleCall=*/true);
}
CGF.EmitOMPPrivateClause(S, PrivateScope);
CGF.EmitOMPReductionClauseInit(S, PrivateScope);
(void)PrivateScope.Privatize();
CGF.EmitStmt(S.getCapturedStmt(OMPD_parallel)->getCapturedStmt());
CGF.EmitOMPReductionClauseFinal(S, /*ReductionKind=*/OMPD_parallel);
};
{
auto LPCRegion =
CGOpenMPRuntime::LastprivateConditionalRAII::disable(*this, S);
emitCommonOMPParallelDirective(*this, S, OMPD_parallel, CodeGen,
emitEmptyBoundParameters);
emitPostUpdateForReductionClause(*this, S,
[](CodeGenFunction &) { return nullptr; });
}
// Check for outer lastprivate conditional update.
checkForLastprivateConditionalUpdate(*this, S);
}
namespace {
/// RAII to handle scopes for loop transformation directives.
class OMPTransformDirectiveScopeRAII {
OMPLoopScope *Scope = nullptr;
CodeGenFunction::CGCapturedStmtInfo *CGSI = nullptr;
CodeGenFunction::CGCapturedStmtRAII *CapInfoRAII = nullptr;
public:
OMPTransformDirectiveScopeRAII(CodeGenFunction &CGF, const Stmt *S) {
if (const auto *Dir = dyn_cast<OMPLoopBasedDirective>(S)) {
Scope = new OMPLoopScope(CGF, *Dir);
CGSI = new CodeGenFunction::CGCapturedStmtInfo(CR_OpenMP);
CapInfoRAII = new CodeGenFunction::CGCapturedStmtRAII(CGF, CGSI);
}
}
~OMPTransformDirectiveScopeRAII() {
if (!Scope)
return;
delete CapInfoRAII;
delete CGSI;
delete Scope;
}
};
} // namespace
static void emitBody(CodeGenFunction &CGF, const Stmt *S, const Stmt *NextLoop,
int MaxLevel, int Level = 0) {
assert(Level < MaxLevel && "Too deep lookup during loop body codegen.");
const Stmt *SimplifiedS = S->IgnoreContainers();
if (const auto *CS = dyn_cast<CompoundStmt>(SimplifiedS)) {
PrettyStackTraceLoc CrashInfo(
CGF.getContext().getSourceManager(), CS->getLBracLoc(),
"LLVM IR generation of compound statement ('{}')");
// Keep track of the current cleanup stack depth, including debug scopes.
CodeGenFunction::LexicalScope Scope(CGF, S->getSourceRange());
for (const Stmt *CurStmt : CS->body())
emitBody(CGF, CurStmt, NextLoop, MaxLevel, Level);
return;
}
if (SimplifiedS == NextLoop) {
if (auto *Dir = dyn_cast<OMPTileDirective>(SimplifiedS))
SimplifiedS = Dir->getTransformedStmt();
if (auto *Dir = dyn_cast<OMPUnrollDirective>(SimplifiedS))
SimplifiedS = Dir->getTransformedStmt();
if (const auto *CanonLoop = dyn_cast<OMPCanonicalLoop>(SimplifiedS))
SimplifiedS = CanonLoop->getLoopStmt();
if (const auto *For = dyn_cast<ForStmt>(SimplifiedS)) {
S = For->getBody();
} else {
assert(isa<CXXForRangeStmt>(SimplifiedS) &&
"Expected canonical for loop or range-based for loop.");
const auto *CXXFor = cast<CXXForRangeStmt>(SimplifiedS);
CGF.EmitStmt(CXXFor->getLoopVarStmt());
S = CXXFor->getBody();
}
if (Level + 1 < MaxLevel) {
NextLoop = OMPLoopDirective::tryToFindNextInnerLoop(
S, /*TryImperfectlyNestedLoops=*/true);
emitBody(CGF, S, NextLoop, MaxLevel, Level + 1);
return;
}
}
CGF.EmitStmt(S);
}
void CodeGenFunction::EmitOMPLoopBody(const OMPLoopDirective &D,
JumpDest LoopExit) {
RunCleanupsScope BodyScope(*this);
// Update counters values on current iteration.
for (const Expr *UE : D.updates())
EmitIgnoredExpr(UE);
// Update the linear variables.
// In distribute directives only loop counters may be marked as linear, no
// need to generate the code for them.
if (!isOpenMPDistributeDirective(D.getDirectiveKind())) {
for (const auto *C : D.getClausesOfKind<OMPLinearClause>()) {
for (const Expr *UE : C->updates())
EmitIgnoredExpr(UE);
}
}
// On a continue in the body, jump to the end.
JumpDest Continue = getJumpDestInCurrentScope("omp.body.continue");
BreakContinueStack.push_back(BreakContinue(LoopExit, Continue));
for (const Expr *E : D.finals_conditions()) {
if (!E)
continue;
// Check that loop counter in non-rectangular nest fits into the iteration
// space.
llvm::BasicBlock *NextBB = createBasicBlock("omp.body.next");
EmitBranchOnBoolExpr(E, NextBB, Continue.getBlock(),
getProfileCount(D.getBody()));
EmitBlock(NextBB);
}
OMPPrivateScope InscanScope(*this);
EmitOMPReductionClauseInit(D, InscanScope, /*ForInscan=*/true);
bool IsInscanRegion = InscanScope.Privatize();
if (IsInscanRegion) {
// Need to remember the block before and after scan directive
// to dispatch them correctly depending on the clause used in
// this directive, inclusive or exclusive. For inclusive scan the natural
// order of the blocks is used, for exclusive clause the blocks must be
// executed in reverse order.
OMPBeforeScanBlock = createBasicBlock("omp.before.scan.bb");
OMPAfterScanBlock = createBasicBlock("omp.after.scan.bb");
// No need to allocate inscan exit block, in simd mode it is selected in the
// codegen for the scan directive.
if (D.getDirectiveKind() != OMPD_simd && !getLangOpts().OpenMPSimd)
OMPScanExitBlock = createBasicBlock("omp.exit.inscan.bb");
OMPScanDispatch = createBasicBlock("omp.inscan.dispatch");
EmitBranch(OMPScanDispatch);
EmitBlock(OMPBeforeScanBlock);
}
// Emit loop variables for C++ range loops.
const Stmt *Body =
D.getInnermostCapturedStmt()->getCapturedStmt()->IgnoreContainers();
// Emit loop body.
emitBody(*this, Body,
OMPLoopBasedDirective::tryToFindNextInnerLoop(
Body, /*TryImperfectlyNestedLoops=*/true),
D.getLoopsNumber());
// Jump to the dispatcher at the end of the loop body.
if (IsInscanRegion)
EmitBranch(OMPScanExitBlock);
// The end (updates/cleanups).
EmitBlock(Continue.getBlock());
BreakContinueStack.pop_back();
}
using EmittedClosureTy = std::pair<llvm::Function *, llvm::Value *>;
/// Emit a captured statement and return the function as well as its captured
/// closure context.
static EmittedClosureTy emitCapturedStmtFunc(CodeGenFunction &ParentCGF,
const CapturedStmt *S) {
LValue CapStruct = ParentCGF.InitCapturedStruct(*S);
CodeGenFunction CGF(ParentCGF.CGM, /*suppressNewContext=*/true);
std::unique_ptr<CodeGenFunction::CGCapturedStmtInfo> CSI =
std::make_unique<CodeGenFunction::CGCapturedStmtInfo>(*S);
CodeGenFunction::CGCapturedStmtRAII CapInfoRAII(CGF, CSI.get());
llvm::Function *F = CGF.GenerateCapturedStmtFunction(*S);
return {F, CapStruct.getPointer(ParentCGF)};
}
/// Emit a call to a previously captured closure.
static llvm::CallInst *
emitCapturedStmtCall(CodeGenFunction &ParentCGF, EmittedClosureTy Cap,
llvm::ArrayRef<llvm::Value *> Args) {
// Append the closure context to the argument.
SmallVector<llvm::Value *> EffectiveArgs;
EffectiveArgs.reserve(Args.size() + 1);
llvm::append_range(EffectiveArgs, Args);
EffectiveArgs.push_back(Cap.second);
return ParentCGF.Builder.CreateCall(Cap.first, EffectiveArgs);
}
llvm::CanonicalLoopInfo *
CodeGenFunction::EmitOMPCollapsedCanonicalLoopNest(const Stmt *S, int Depth) {
assert(Depth == 1 && "Nested loops with OpenMPIRBuilder not yet implemented");
EmitStmt(S);
assert(OMPLoopNestStack.size() >= (size_t)Depth && "Found too few loops");
// The last added loop is the outermost one.
return OMPLoopNestStack.back();
}
void CodeGenFunction::EmitOMPCanonicalLoop(const OMPCanonicalLoop *S) {
const Stmt *SyntacticalLoop = S->getLoopStmt();
if (!getLangOpts().OpenMPIRBuilder) {
// Ignore if OpenMPIRBuilder is not enabled.
EmitStmt(SyntacticalLoop);
return;
}
LexicalScope ForScope(*this, S->getSourceRange());
// Emit init statements. The Distance/LoopVar funcs may reference variable
// declarations they contain.
const Stmt *BodyStmt;
if (const auto *For = dyn_cast<ForStmt>(SyntacticalLoop)) {
if (const Stmt *InitStmt = For->getInit())
EmitStmt(InitStmt);
BodyStmt = For->getBody();
} else if (const auto *RangeFor =
dyn_cast<CXXForRangeStmt>(SyntacticalLoop)) {
if (const DeclStmt *RangeStmt = RangeFor->getRangeStmt())
EmitStmt(RangeStmt);
if (const DeclStmt *BeginStmt = RangeFor->getBeginStmt())
EmitStmt(BeginStmt);
if (const DeclStmt *EndStmt = RangeFor->getEndStmt())
EmitStmt(EndStmt);
if (const DeclStmt *LoopVarStmt = RangeFor->getLoopVarStmt())
EmitStmt(LoopVarStmt);
BodyStmt = RangeFor->getBody();
} else
llvm_unreachable("Expected for-stmt or range-based for-stmt");
// Emit closure for later use. By-value captures will be captured here.
const CapturedStmt *DistanceFunc = S->getDistanceFunc();
EmittedClosureTy DistanceClosure = emitCapturedStmtFunc(*this, DistanceFunc);
const CapturedStmt *LoopVarFunc = S->getLoopVarFunc();
EmittedClosureTy LoopVarClosure = emitCapturedStmtFunc(*this, LoopVarFunc);
// Call the distance function to get the number of iterations of the loop to
// come.
QualType LogicalTy = DistanceFunc->getCapturedDecl()
->getParam(0)
->getType()
.getNonReferenceType();
Address CountAddr = CreateMemTemp(LogicalTy, ".count.addr");
emitCapturedStmtCall(*this, DistanceClosure, {CountAddr.getPointer()});
llvm::Value *DistVal = Builder.CreateLoad(CountAddr, ".count");
// Emit the loop structure.
llvm::OpenMPIRBuilder &OMPBuilder = CGM.getOpenMPRuntime().getOMPBuilder();
auto BodyGen = [&, this](llvm::OpenMPIRBuilder::InsertPointTy CodeGenIP,
llvm::Value *IndVar) {
Builder.restoreIP(CodeGenIP);
// Emit the loop body: Convert the logical iteration number to the loop
// variable and emit the body.
const DeclRefExpr *LoopVarRef = S->getLoopVarRef();
LValue LCVal = EmitLValue(LoopVarRef);
Address LoopVarAddress = LCVal.getAddress(*this);
emitCapturedStmtCall(*this, LoopVarClosure,
{LoopVarAddress.getPointer(), IndVar});
RunCleanupsScope BodyScope(*this);
EmitStmt(BodyStmt);
};
llvm::CanonicalLoopInfo *CL =
OMPBuilder.createCanonicalLoop(Builder, BodyGen, DistVal);
// Finish up the loop.
Builder.restoreIP(CL->getAfterIP());
ForScope.ForceCleanup();
// Remember the CanonicalLoopInfo for parent AST nodes consuming it.
OMPLoopNestStack.push_back(CL);
}
void CodeGenFunction::EmitOMPInnerLoop(
const OMPExecutableDirective &S, bool RequiresCleanup, const Expr *LoopCond,
const Expr *IncExpr,
const llvm::function_ref<void(CodeGenFunction &)> BodyGen,
const llvm::function_ref<void(CodeGenFunction &)> PostIncGen) {
auto LoopExit = getJumpDestInCurrentScope("omp.inner.for.end");
// Start the loop with a block that tests the condition.
auto CondBlock = createBasicBlock("omp.inner.for.cond");
EmitBlock(CondBlock);
const SourceRange R = S.getSourceRange();
// If attributes are attached, push to the basic block with them.
const auto &OMPED = cast<OMPExecutableDirective>(S);
const CapturedStmt *ICS = OMPED.getInnermostCapturedStmt();
const Stmt *SS = ICS->getCapturedStmt();
const AttributedStmt *AS = dyn_cast_or_null<AttributedStmt>(SS);
OMPLoopNestStack.clear();
if (AS)
LoopStack.push(CondBlock, CGM.getContext(), CGM.getCodeGenOpts(),
AS->getAttrs(), SourceLocToDebugLoc(R.getBegin()),
SourceLocToDebugLoc(R.getEnd()));
else
LoopStack.push(CondBlock, SourceLocToDebugLoc(R.getBegin()),
SourceLocToDebugLoc(R.getEnd()));
// If there are any cleanups between here and the loop-exit scope,
// create a block to stage a loop exit along.
llvm::BasicBlock *ExitBlock = LoopExit.getBlock();
if (RequiresCleanup)
ExitBlock = createBasicBlock("omp.inner.for.cond.cleanup");
llvm::BasicBlock *LoopBody = createBasicBlock("omp.inner.for.body");
// Emit condition.
EmitBranchOnBoolExpr(LoopCond, LoopBody, ExitBlock, getProfileCount(&S));
if (ExitBlock != LoopExit.getBlock()) {
EmitBlock(ExitBlock);
EmitBranchThroughCleanup(LoopExit);
}
EmitBlock(LoopBody);
incrementProfileCounter(&S);
// Create a block for the increment.
JumpDest Continue = getJumpDestInCurrentScope("omp.inner.for.inc");
BreakContinueStack.push_back(BreakContinue(LoopExit, Continue));
BodyGen(*this);
// Emit "IV = IV + 1" and a back-edge to the condition block.
EmitBlock(Continue.getBlock());
EmitIgnoredExpr(IncExpr);
PostIncGen(*this);
BreakContinueStack.pop_back();
EmitBranch(CondBlock);
LoopStack.pop();
// Emit the fall-through block.
EmitBlock(LoopExit.getBlock());
}
bool CodeGenFunction::EmitOMPLinearClauseInit(const OMPLoopDirective &D) {
if (!HaveInsertPoint())
return false;
// Emit inits for the linear variables.
bool HasLinears = false;
for (const auto *C : D.getClausesOfKind<OMPLinearClause>()) {
for (const Expr *Init : C->inits()) {
HasLinears = true;
const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(Init)->getDecl());
if (const auto *Ref =
dyn_cast<DeclRefExpr>(VD->getInit()->IgnoreImpCasts())) {
AutoVarEmission Emission = EmitAutoVarAlloca(*VD);
const auto *OrigVD = cast<VarDecl>(Ref->getDecl());
DeclRefExpr DRE(getContext(), const_cast<VarDecl *>(OrigVD),
CapturedStmtInfo->lookup(OrigVD) != nullptr,
VD->getInit()->getType(), VK_LValue,
VD->getInit()->getExprLoc());
EmitExprAsInit(&DRE, VD, MakeAddrLValue(Emission.getAllocatedAddress(),
VD->getType()),
/*capturedByInit=*/false);
EmitAutoVarCleanups(Emission);
} else {
EmitVarDecl(*VD);
}
}
// Emit the linear steps for the linear clauses.
// If a step is not constant, it is pre-calculated before the loop.
if (const auto *CS = cast_or_null<BinaryOperator>(C->getCalcStep()))
if (const auto *SaveRef = cast<DeclRefExpr>(CS->getLHS())) {
EmitVarDecl(*cast<VarDecl>(SaveRef->getDecl()));
// Emit calculation of the linear step.
EmitIgnoredExpr(CS);
}
}
return HasLinears;
}
void CodeGenFunction::EmitOMPLinearClauseFinal(
const OMPLoopDirective &D,
const llvm::function_ref<llvm::Value *(CodeGenFunction &)> CondGen) {
if (!HaveInsertPoint())
return;
llvm::BasicBlock *DoneBB = nullptr;
// Emit the final values of the linear variables.
for (const auto *C : D.getClausesOfKind<OMPLinearClause>()) {
auto IC = C->varlist_begin();
for (const Expr *F : C->finals()) {
if (!DoneBB) {
if (llvm::Value *Cond = CondGen(*this)) {
// If the first post-update expression is found, emit conditional
// block if it was requested.
llvm::BasicBlock *ThenBB = createBasicBlock(".omp.linear.pu");
DoneBB = createBasicBlock(".omp.linear.pu.done");
Builder.CreateCondBr(Cond, ThenBB, DoneBB);
EmitBlock(ThenBB);
}
}
const auto *OrigVD = cast<VarDecl>(cast<DeclRefExpr>(*IC)->getDecl());
DeclRefExpr DRE(getContext(), const_cast<VarDecl *>(OrigVD),
CapturedStmtInfo->lookup(OrigVD) != nullptr,
(*IC)->getType(), VK_LValue, (*IC)->getExprLoc());
Address OrigAddr = EmitLValue(&DRE).getAddress(*this);
CodeGenFunction::OMPPrivateScope VarScope(*this);
VarScope.addPrivate(OrigVD, [OrigAddr]() { return OrigAddr; });
(void)VarScope.Privatize();
EmitIgnoredExpr(F);
++IC;
}
if (const Expr *PostUpdate = C->getPostUpdateExpr())
EmitIgnoredExpr(PostUpdate);
}
if (DoneBB)
EmitBlock(DoneBB, /*IsFinished=*/true);
}
static void emitAlignedClause(CodeGenFunction &CGF,
const OMPExecutableDirective &D) {
if (!CGF.HaveInsertPoint())
return;
for (const auto *Clause : D.getClausesOfKind<OMPAlignedClause>()) {
llvm::APInt ClauseAlignment(64, 0);
if (const Expr *AlignmentExpr = Clause->getAlignment()) {
auto *AlignmentCI =
cast<llvm::ConstantInt>(CGF.EmitScalarExpr(AlignmentExpr));
ClauseAlignment = AlignmentCI->getValue();
}
for (const Expr *E : Clause->varlists()) {
llvm::APInt Alignment(ClauseAlignment);
if (Alignment == 0) {
// OpenMP [2.8.1, Description]
// If no optional parameter is specified, implementation-defined default
// alignments for SIMD instructions on the target platforms are assumed.
Alignment =
CGF.getContext()
.toCharUnitsFromBits(CGF.getContext().getOpenMPDefaultSimdAlign(
E->getType()->getPointeeType()))
.getQuantity();
}
assert((Alignment == 0 || Alignment.isPowerOf2()) &&
"alignment is not power of 2");
if (Alignment != 0) {
llvm::Value *PtrValue = CGF.EmitScalarExpr(E);
CGF.emitAlignmentAssumption(
PtrValue, E, /*No second loc needed*/ SourceLocation(),
llvm::ConstantInt::get(CGF.getLLVMContext(), Alignment));
}
}
}
}
void CodeGenFunction::EmitOMPPrivateLoopCounters(
const OMPLoopDirective &S, CodeGenFunction::OMPPrivateScope &LoopScope) {
if (!HaveInsertPoint())
return;
auto I = S.private_counters().begin();
for (const Expr *E : S.counters()) {
const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl());
const auto *PrivateVD = cast<VarDecl>(cast<DeclRefExpr>(*I)->getDecl());
// Emit var without initialization.
AutoVarEmission VarEmission = EmitAutoVarAlloca(*PrivateVD);
EmitAutoVarCleanups(VarEmission);
LocalDeclMap.erase(PrivateVD);
(void)LoopScope.addPrivate(VD, [&VarEmission]() {
return VarEmission.getAllocatedAddress();
});
if (LocalDeclMap.count(VD) || CapturedStmtInfo->lookup(VD) ||
VD->hasGlobalStorage()) {
(void)LoopScope.addPrivate(PrivateVD, [this, VD, E]() {
DeclRefExpr DRE(getContext(), const_cast<VarDecl *>(VD),
LocalDeclMap.count(VD) || CapturedStmtInfo->lookup(VD),
E->getType(), VK_LValue, E->getExprLoc());
return EmitLValue(&DRE).getAddress(*this);
});
} else {
(void)LoopScope.addPrivate(PrivateVD, [&VarEmission]() {
return VarEmission.getAllocatedAddress();
});
}
++I;
}
// Privatize extra loop counters used in loops for ordered(n) clauses.
for (const auto *C : S.getClausesOfKind<OMPOrderedClause>()) {
if (!C->getNumForLoops())
continue;
for (unsigned I = S.getLoopsNumber(), E = C->getLoopNumIterations().size();
I < E; ++I) {
const auto *DRE = cast<DeclRefExpr>(C->getLoopCounter(I));
const auto *VD = cast<VarDecl>(DRE->getDecl());
// Override only those variables that can be captured to avoid re-emission
// of the variables declared within the loops.
if (DRE->refersToEnclosingVariableOrCapture()) {
(void)LoopScope.addPrivate(VD, [this, DRE, VD]() {
return CreateMemTemp(DRE->getType(), VD->getName());
});
}
}
}
}
static void emitPreCond(CodeGenFunction &CGF, const OMPLoopDirective &S,
const Expr *Cond, llvm::BasicBlock *TrueBlock,
llvm::BasicBlock *FalseBlock, uint64_t TrueCount) {
if (!CGF.HaveInsertPoint())
return;
{
CodeGenFunction::OMPPrivateScope PreCondScope(CGF);
CGF.EmitOMPPrivateLoopCounters(S, PreCondScope);
(void)PreCondScope.Privatize();
// Get initial values of real counters.
for (const Expr *I : S.inits()) {
CGF.EmitIgnoredExpr(I);
}
}
// Create temp loop control variables with their init values to support
// non-rectangular loops.
CodeGenFunction::OMPMapVars PreCondVars;
for (const Expr * E: S.dependent_counters()) {
if (!E)
continue;
assert(!E->getType().getNonReferenceType()->isRecordType() &&
"dependent counter must not be an iterator.");
const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl());
Address CounterAddr =
CGF.CreateMemTemp(VD->getType().getNonReferenceType());
(void)PreCondVars.setVarAddr(CGF, VD, CounterAddr);
}
(void)PreCondVars.apply(CGF);
for (const Expr *E : S.dependent_inits()) {
if (!E)
continue;
CGF.EmitIgnoredExpr(E);
}
// Check that loop is executed at least one time.
CGF.EmitBranchOnBoolExpr(Cond, TrueBlock, FalseBlock, TrueCount);
PreCondVars.restore(CGF);
}
void CodeGenFunction::EmitOMPLinearClause(
const OMPLoopDirective &D, CodeGenFunction::OMPPrivateScope &PrivateScope) {
if (!HaveInsertPoint())
return;
llvm::DenseSet<const VarDecl *> SIMDLCVs;
if (isOpenMPSimdDirective(D.getDirectiveKind())) {
const auto *LoopDirective = cast<OMPLoopDirective>(&D);
for (const Expr *C : LoopDirective->counters()) {
SIMDLCVs.insert(
cast<VarDecl>(cast<DeclRefExpr>(C)->getDecl())->getCanonicalDecl());
}
}
for (const auto *C : D.getClausesOfKind<OMPLinearClause>()) {
auto CurPrivate = C->privates().begin();
for (const Expr *E : C->varlists()) {
const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl());
const auto *PrivateVD =
cast<VarDecl>(cast<DeclRefExpr>(*CurPrivate)->getDecl());
if (!SIMDLCVs.count(VD->getCanonicalDecl())) {
bool IsRegistered = PrivateScope.addPrivate(VD, [this, PrivateVD]() {
// Emit private VarDecl with copy init.
EmitVarDecl(*PrivateVD);
return GetAddrOfLocalVar(PrivateVD);
});
assert(IsRegistered && "linear var already registered as private");
// Silence the warning about unused variable.
(void)IsRegistered;
} else {
EmitVarDecl(*PrivateVD);
}
++CurPrivate;
}
}
}
static void emitSimdlenSafelenClause(CodeGenFunction &CGF,
const OMPExecutableDirective &D) {
if (!CGF.HaveInsertPoint())
return;
if (const auto *C = D.getSingleClause<OMPSimdlenClause>()) {
RValue Len = CGF.EmitAnyExpr(C->getSimdlen(), AggValueSlot::ignored(),
/*ignoreResult=*/true);
auto *Val = cast<llvm::ConstantInt>(Len.getScalarVal());
CGF.LoopStack.setVectorizeWidth(Val->getZExtValue());
// In presence of finite 'safelen', it may be unsafe to mark all
// the memory instructions parallel, because loop-carried
// dependences of 'safelen' iterations are possible.
CGF.LoopStack.setParallel(!D.getSingleClause<OMPSafelenClause>());
} else if (const auto *C = D.getSingleClause<OMPSafelenClause>()) {
RValue Len = CGF.EmitAnyExpr(C->getSafelen(), AggValueSlot::ignored(),
/*ignoreResult=*/true);
auto *Val = cast<llvm::ConstantInt>(Len.getScalarVal());
CGF.LoopStack.setVectorizeWidth(Val->getZExtValue());
// In presence of finite 'safelen', it may be unsafe to mark all
// the memory instructions parallel, because loop-carried
// dependences of 'safelen' iterations are possible.
CGF.LoopStack.setParallel(/*Enable=*/false);
}
}
void CodeGenFunction::EmitOMPSimdInit(const OMPLoopDirective &D) {
// Walk clauses and process safelen/lastprivate.
LoopStack.setParallel(/*Enable=*/true);
LoopStack.setVectorizeEnable();
emitSimdlenSafelenClause(*this, D);
if (const auto *C = D.getSingleClause<OMPOrderClause>())
if (C->getKind() == OMPC_ORDER_concurrent)
LoopStack.setParallel(/*Enable=*/true);
if ((D.getDirectiveKind() == OMPD_simd ||
(getLangOpts().OpenMPSimd &&
isOpenMPSimdDirective(D.getDirectiveKind()))) &&
llvm::any_of(D.getClausesOfKind<OMPReductionClause>(),
[](const OMPReductionClause *C) {
return C->getModifier() == OMPC_REDUCTION_inscan;
}))
// Disable parallel access in case of prefix sum.
LoopStack.setParallel(/*Enable=*/false);
}
void CodeGenFunction::EmitOMPSimdFinal(
const OMPLoopDirective &D,
const llvm::function_ref<llvm::Value *(CodeGenFunction &)> CondGen) {
if (!HaveInsertPoint())
return;
llvm::BasicBlock *DoneBB = nullptr;
auto IC = D.counters().begin();
auto IPC = D.private_counters().begin();
for (const Expr *F : D.finals()) {
const auto *OrigVD = cast<VarDecl>(cast<DeclRefExpr>((*IC))->getDecl());
const auto *PrivateVD = cast<VarDecl>(cast<DeclRefExpr>((*IPC))->getDecl());
const auto *CED = dyn_cast<OMPCapturedExprDecl>(OrigVD);
if (LocalDeclMap.count(OrigVD) || CapturedStmtInfo->lookup(OrigVD) ||
OrigVD->hasGlobalStorage() || CED) {
if (!DoneBB) {
if (llvm::Value *Cond = CondGen(*this)) {
// If the first post-update expression is found, emit conditional
// block if it was requested.
llvm::BasicBlock *ThenBB = createBasicBlock(".omp.final.then");
DoneBB = createBasicBlock(".omp.final.done");
Builder.CreateCondBr(Cond, ThenBB, DoneBB);
EmitBlock(ThenBB);
}
}
Address OrigAddr = Address::invalid();
if (CED) {
OrigAddr =
EmitLValue(CED->getInit()->IgnoreImpCasts()).getAddress(*this);
} else {
DeclRefExpr DRE(getContext(), const_cast<VarDecl *>(PrivateVD),
/*RefersToEnclosingVariableOrCapture=*/false,
(*IPC)->getType(), VK_LValue, (*IPC)->getExprLoc());
OrigAddr = EmitLValue(&DRE).getAddress(*this);
}
OMPPrivateScope VarScope(*this);
VarScope.addPrivate(OrigVD, [OrigAddr]() { return OrigAddr; });
(void)VarScope.Privatize();
EmitIgnoredExpr(F);
}
++IC;
++IPC;
}
if (DoneBB)
EmitBlock(DoneBB, /*IsFinished=*/true);
}
static void emitOMPLoopBodyWithStopPoint(CodeGenFunction &CGF,
const OMPLoopDirective &S,
CodeGenFunction::JumpDest LoopExit) {
CGF.EmitOMPLoopBody(S, LoopExit);
CGF.EmitStopPoint(&S);
}
/// Emit a helper variable and return corresponding lvalue.
static LValue EmitOMPHelperVar(CodeGenFunction &CGF,
const DeclRefExpr *Helper) {
auto VDecl = cast<VarDecl>(Helper->getDecl());
CGF.EmitVarDecl(*VDecl);
return CGF.EmitLValue(Helper);
}
static void emitCommonSimdLoop(CodeGenFunction &CGF, const OMPLoopDirective &S,
const RegionCodeGenTy &SimdInitGen,
const RegionCodeGenTy &BodyCodeGen) {
auto &&ThenGen = [&S, &SimdInitGen, &BodyCodeGen](CodeGenFunction &CGF,
PrePostActionTy &) {
CGOpenMPRuntime::NontemporalDeclsRAII NontemporalsRegion(CGF.CGM, S);
CodeGenFunction::OMPLocalDeclMapRAII Scope(CGF);
SimdInitGen(CGF);
BodyCodeGen(CGF);
};
auto &&ElseGen = [&BodyCodeGen](CodeGenFunction &CGF, PrePostActionTy &) {
CodeGenFunction::OMPLocalDeclMapRAII Scope(CGF);
CGF.LoopStack.setVectorizeEnable(/*Enable=*/false);
BodyCodeGen(CGF);
};
const Expr *IfCond = nullptr;
if (isOpenMPSimdDirective(S.getDirectiveKind())) {
for (const auto *C : S.getClausesOfKind<OMPIfClause>()) {
if (CGF.getLangOpts().OpenMP >= 50 &&
(C->getNameModifier() == OMPD_unknown ||
C->getNameModifier() == OMPD_simd)) {
IfCond = C->getCondition();
break;
}
}
}
if (IfCond) {
CGF.CGM.getOpenMPRuntime().emitIfClause(CGF, IfCond, ThenGen, ElseGen);
} else {
RegionCodeGenTy ThenRCG(ThenGen);
ThenRCG(CGF);
}
}
static void emitOMPSimdRegion(CodeGenFunction &CGF, const OMPLoopDirective &S,
PrePostActionTy &Action) {
Action.Enter(CGF);
assert(isOpenMPSimdDirective(S.getDirectiveKind()) &&
"Expected simd directive");
OMPLoopScope PreInitScope(CGF, S);
// if (PreCond) {
// for (IV in 0..LastIteration) BODY;
// <Final counter/linear vars updates>;
// }
//
if (isOpenMPDistributeDirective(S.getDirectiveKind()) ||
isOpenMPWorksharingDirective(S.getDirectiveKind()) ||
isOpenMPTaskLoopDirective(S.getDirectiveKind())) {
(void)EmitOMPHelperVar(CGF, cast<DeclRefExpr>(S.getLowerBoundVariable()));
(void)EmitOMPHelperVar(CGF, cast<DeclRefExpr>(S.getUpperBoundVariable()));
}
// Emit: if (PreCond) - begin.
// If the condition constant folds and can be elided, avoid emitting the
// whole loop.
bool CondConstant;
llvm::BasicBlock *ContBlock = nullptr;
if (CGF.ConstantFoldsToSimpleInteger(S.getPreCond(), CondConstant)) {
if (!CondConstant)
return;
} else {
llvm::BasicBlock *ThenBlock = CGF.createBasicBlock("simd.if.then");
ContBlock = CGF.createBasicBlock("simd.if.end");
emitPreCond(CGF, S, S.getPreCond(), ThenBlock, ContBlock,
CGF.getProfileCount(&S));
CGF.EmitBlock(ThenBlock);
CGF.incrementProfileCounter(&S);
}
// Emit the loop iteration variable.
const Expr *IVExpr = S.getIterationVariable();
const auto *IVDecl = cast<VarDecl>(cast<DeclRefExpr>(IVExpr)->getDecl());
CGF.EmitVarDecl(*IVDecl);
CGF.EmitIgnoredExpr(S.getInit());
// Emit the iterations count variable.
// If it is not a variable, Sema decided to calculate iterations count on
// each iteration (e.g., it is foldable into a constant).
if (const auto *LIExpr = dyn_cast<DeclRefExpr>(S.getLastIteration())) {
CGF.EmitVarDecl(*cast<VarDecl>(LIExpr->getDecl()));
// Emit calculation of the iterations count.
CGF.EmitIgnoredExpr(S.getCalcLastIteration());
}
emitAlignedClause(CGF, S);
(void)CGF.EmitOMPLinearClauseInit(S);
{
CodeGenFunction::OMPPrivateScope LoopScope(CGF);
CGF.EmitOMPPrivateLoopCounters(S, LoopScope);
CGF.EmitOMPLinearClause(S, LoopScope);
CGF.EmitOMPPrivateClause(S, LoopScope);
CGF.EmitOMPReductionClauseInit(S, LoopScope);
CGOpenMPRuntime::LastprivateConditionalRAII LPCRegion(
CGF, S, CGF.EmitLValue(S.getIterationVariable()));
bool HasLastprivateClause = CGF.EmitOMPLastprivateClauseInit(S, LoopScope);
(void)LoopScope.Privatize();
if (isOpenMPTargetExecutionDirective(S.getDirectiveKind()))
CGF.CGM.getOpenMPRuntime().adjustTargetSpecificDataForLambdas(CGF, S);
emitCommonSimdLoop(
CGF, S,
[&S](CodeGenFunction &CGF, PrePostActionTy &) {
CGF.EmitOMPSimdInit(S);
},
[&S, &LoopScope](CodeGenFunction &CGF, PrePostActionTy &) {
CGF.EmitOMPInnerLoop(
S, LoopScope.requiresCleanups(), S.getCond(), S.getInc(),
[&S](CodeGenFunction &CGF) {
emitOMPLoopBodyWithStopPoint(CGF, S,
CodeGenFunction::JumpDest());
},
[](CodeGenFunction &) {});
});
CGF.EmitOMPSimdFinal(S, [](CodeGenFunction &) { return nullptr; });
// Emit final copy of the lastprivate variables at the end of loops.
if (HasLastprivateClause)
CGF.EmitOMPLastprivateClauseFinal(S, /*NoFinals=*/true);
CGF.EmitOMPReductionClauseFinal(S, /*ReductionKind=*/OMPD_simd);
emitPostUpdateForReductionClause(CGF, S,
[](CodeGenFunction &) { return nullptr; });
}
CGF.EmitOMPLinearClauseFinal(S, [](CodeGenFunction &) { return nullptr; });
// Emit: if (PreCond) - end.
if (ContBlock) {
CGF.EmitBranch(ContBlock);
CGF.EmitBlock(ContBlock, true);
}
}
void CodeGenFunction::EmitOMPSimdDirective(const OMPSimdDirective &S) {
ParentLoopDirectiveForScanRegion ScanRegion(*this, S);
OMPFirstScanLoop = true;
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitOMPSimdRegion(CGF, S, Action);
};
{
auto LPCRegion =
CGOpenMPRuntime::LastprivateConditionalRAII::disable(*this, S);
OMPLexicalScope Scope(*this, S, OMPD_unknown);
CGM.getOpenMPRuntime().emitInlinedDirective(*this, OMPD_simd, CodeGen);
}
// Check for outer lastprivate conditional update.
checkForLastprivateConditionalUpdate(*this, S);
}
void CodeGenFunction::EmitOMPTileDirective(const OMPTileDirective &S) {
// Emit the de-sugared statement.
OMPTransformDirectiveScopeRAII TileScope(*this, &S);
EmitStmt(S.getTransformedStmt());
}
void CodeGenFunction::EmitOMPUnrollDirective(const OMPUnrollDirective &S) {
// This function is only called if the unrolled loop is not consumed by any
// other loop-associated construct. Such a loop-associated construct will have
// used the transformed AST.
// Set the unroll metadata for the next emitted loop.
LoopStack.setUnrollState(LoopAttributes::Enable);
if (S.hasClausesOfKind<OMPFullClause>()) {
LoopStack.setUnrollState(LoopAttributes::Full);
} else if (auto *PartialClause = S.getSingleClause<OMPPartialClause>()) {
if (Expr *FactorExpr = PartialClause->getFactor()) {
uint64_t Factor =
FactorExpr->EvaluateKnownConstInt(getContext()).getZExtValue();
assert(Factor >= 1 && "Only positive factors are valid");
LoopStack.setUnrollCount(Factor);
}
}
EmitStmt(S.getAssociatedStmt());
}
void CodeGenFunction::EmitOMPOuterLoop(
bool DynamicOrOrdered, bool IsMonotonic, const OMPLoopDirective &S,
CodeGenFunction::OMPPrivateScope &LoopScope,
const CodeGenFunction::OMPLoopArguments &LoopArgs,
const CodeGenFunction::CodeGenLoopTy &CodeGenLoop,
const CodeGenFunction::CodeGenOrderedTy &CodeGenOrdered) {
CGOpenMPRuntime &RT = CGM.getOpenMPRuntime();
const Expr *IVExpr = S.getIterationVariable();
const unsigned IVSize = getContext().getTypeSize(IVExpr->getType());
const bool IVSigned = IVExpr->getType()->hasSignedIntegerRepresentation();
JumpDest LoopExit = getJumpDestInCurrentScope("omp.dispatch.end");
// Start the loop with a block that tests the condition.
llvm::BasicBlock *CondBlock = createBasicBlock("omp.dispatch.cond");
EmitBlock(CondBlock);
const SourceRange R = S.getSourceRange();
OMPLoopNestStack.clear();
LoopStack.push(CondBlock, SourceLocToDebugLoc(R.getBegin()),
SourceLocToDebugLoc(R.getEnd()));
llvm::Value *BoolCondVal = nullptr;
if (!DynamicOrOrdered) {
// UB = min(UB, GlobalUB) or
// UB = min(UB, PrevUB) for combined loop sharing constructs (e.g.
// 'distribute parallel for')
EmitIgnoredExpr(LoopArgs.EUB);
// IV = LB
EmitIgnoredExpr(LoopArgs.Init);
// IV < UB
BoolCondVal = EvaluateExprAsBool(LoopArgs.Cond);
} else {
BoolCondVal =
RT.emitForNext(*this, S.getBeginLoc(), IVSize, IVSigned, LoopArgs.IL,
LoopArgs.LB, LoopArgs.UB, LoopArgs.ST);
}
// If there are any cleanups between here and the loop-exit scope,
// create a block to stage a loop exit along.
llvm::BasicBlock *ExitBlock = LoopExit.getBlock();
if (LoopScope.requiresCleanups())
ExitBlock = createBasicBlock("omp.dispatch.cleanup");
llvm::BasicBlock *LoopBody = createBasicBlock("omp.dispatch.body");
Builder.CreateCondBr(BoolCondVal, LoopBody, ExitBlock);
if (ExitBlock != LoopExit.getBlock()) {
EmitBlock(ExitBlock);
EmitBranchThroughCleanup(LoopExit);
}
EmitBlock(LoopBody);
// Emit "IV = LB" (in case of static schedule, we have already calculated new
// LB for loop condition and emitted it above).
if (DynamicOrOrdered)
EmitIgnoredExpr(LoopArgs.Init);
// Create a block for the increment.
JumpDest Continue = getJumpDestInCurrentScope("omp.dispatch.inc");
BreakContinueStack.push_back(BreakContinue(LoopExit, Continue));
emitCommonSimdLoop(
*this, S,
[&S, IsMonotonic](CodeGenFunction &CGF, PrePostActionTy &) {
// Generate !llvm.loop.parallel metadata for loads and stores for loops
// with dynamic/guided scheduling and without ordered clause.
if (!isOpenMPSimdDirective(S.getDirectiveKind())) {
CGF.LoopStack.setParallel(!IsMonotonic);
if (const auto *C = S.getSingleClause<OMPOrderClause>())
if (C->getKind() == OMPC_ORDER_concurrent)
CGF.LoopStack.setParallel(/*Enable=*/true);
} else {
CGF.EmitOMPSimdInit(S);
}
},
[&S, &LoopArgs, LoopExit, &CodeGenLoop, IVSize, IVSigned, &CodeGenOrdered,
&LoopScope](CodeGenFunction &CGF, PrePostActionTy &) {
SourceLocation Loc = S.getBeginLoc();
// when 'distribute' is not combined with a 'for':
// while (idx <= UB) { BODY; ++idx; }
// when 'distribute' is combined with a 'for'
// (e.g. 'distribute parallel for')
// while (idx <= UB) { <CodeGen rest of pragma>; idx += ST; }
CGF.EmitOMPInnerLoop(
S, LoopScope.requiresCleanups(), LoopArgs.Cond, LoopArgs.IncExpr,
[&S, LoopExit, &CodeGenLoop](CodeGenFunction &CGF) {
CodeGenLoop(CGF, S, LoopExit);
},
[IVSize, IVSigned, Loc, &CodeGenOrdered](CodeGenFunction &CGF) {
CodeGenOrdered(CGF, Loc, IVSize, IVSigned);
});
});
EmitBlock(Continue.getBlock());
BreakContinueStack.pop_back();
if (!DynamicOrOrdered) {
// Emit "LB = LB + Stride", "UB = UB + Stride".
EmitIgnoredExpr(LoopArgs.NextLB);
EmitIgnoredExpr(LoopArgs.NextUB);
}
EmitBranch(CondBlock);
OMPLoopNestStack.clear();
LoopStack.pop();
// Emit the fall-through block.
EmitBlock(LoopExit.getBlock());
// Tell the runtime we are done.
auto &&CodeGen = [DynamicOrOrdered, &S](CodeGenFunction &CGF) {
if (!DynamicOrOrdered)
CGF.CGM.getOpenMPRuntime().emitForStaticFinish(CGF, S.getEndLoc(),
S.getDirectiveKind());
};
OMPCancelStack.emitExit(*this, S.getDirectiveKind(), CodeGen);
}
void CodeGenFunction::EmitOMPForOuterLoop(
const OpenMPScheduleTy &ScheduleKind, bool IsMonotonic,
const OMPLoopDirective &S, OMPPrivateScope &LoopScope, bool Ordered,
const OMPLoopArguments &LoopArgs,
const CodeGenDispatchBoundsTy &CGDispatchBounds) {
CGOpenMPRuntime &RT = CGM.getOpenMPRuntime();
// Dynamic scheduling of the outer loop (dynamic, guided, auto, runtime).
const bool DynamicOrOrdered =
Ordered || RT.isDynamic(ScheduleKind.Schedule);
assert((Ordered ||
!RT.isStaticNonchunked(ScheduleKind.Schedule,
LoopArgs.Chunk != nullptr)) &&
"static non-chunked schedule does not need outer loop");
// Emit outer loop.
//
// OpenMP [2.7.1, Loop Construct, Description, table 2-1]
// When schedule(dynamic,chunk_size) is specified, the iterations are
// distributed to threads in the team in chunks as the threads request them.
// Each thread executes a chunk of iterations, then requests another chunk,
// until no chunks remain to be distributed. Each chunk contains chunk_size
// iterations, except for the last chunk to be distributed, which may have
// fewer iterations. When no chunk_size is specified, it defaults to 1.
//
// When schedule(guided,chunk_size) is specified, the iterations are assigned
// to threads in the team in chunks as the executing threads request them.
// Each thread executes a chunk of iterations, then requests another chunk,
// until no chunks remain to be assigned. For a chunk_size of 1, the size of
// each chunk is proportional to the number of unassigned iterations divided
// by the number of threads in the team, decreasing to 1. For a chunk_size
// with value k (greater than 1), the size of each chunk is determined in the
// same way, with the restriction that the chunks do not contain fewer than k
// iterations (except for the last chunk to be assigned, which may have fewer
// than k iterations).
//
// When schedule(auto) is specified, the decision regarding scheduling is
// delegated to the compiler and/or runtime system. The programmer gives the
// implementation the freedom to choose any possible mapping of iterations to
// threads in the team.
//
// When schedule(runtime) is specified, the decision regarding scheduling is
// deferred until run time, and the schedule and chunk size are taken from the
// run-sched-var ICV. If the ICV is set to auto, the schedule is
// implementation defined
//
// while(__kmpc_dispatch_next(&LB, &UB)) {
// idx = LB;
// while (idx <= UB) { BODY; ++idx;
// __kmpc_dispatch_fini_(4|8)[u](); // For ordered loops only.
// } // inner loop
// }
//
// OpenMP [2.7.1, Loop Construct, Description, table 2-1]
// When schedule(static, chunk_size) is specified, iterations are divided into
// chunks of size chunk_size, and the chunks are assigned to the threads in
// the team in a round-robin fashion in the order of the thread number.
//
// while(UB = min(UB, GlobalUB), idx = LB, idx < UB) {
// while (idx <= UB) { BODY; ++idx; } // inner loop
// LB = LB + ST;
// UB = UB + ST;
// }
//
const Expr *IVExpr = S.getIterationVariable();
const unsigned IVSize = getContext().getTypeSize(IVExpr->getType());
const bool IVSigned = IVExpr->getType()->hasSignedIntegerRepresentation();
if (DynamicOrOrdered) {
const std::pair<llvm::Value *, llvm::Value *> DispatchBounds =
CGDispatchBounds(*this, S, LoopArgs.LB, LoopArgs.UB);
llvm::Value *LBVal = DispatchBounds.first;
llvm::Value *UBVal = DispatchBounds.second;
CGOpenMPRuntime::DispatchRTInput DipatchRTInputValues = {LBVal, UBVal,
LoopArgs.Chunk};
RT.emitForDispatchInit(*this, S.getBeginLoc(), ScheduleKind, IVSize,
IVSigned, Ordered, DipatchRTInputValues);
} else {
CGOpenMPRuntime::StaticRTInput StaticInit(
IVSize, IVSigned, Ordered, LoopArgs.IL, LoopArgs.LB, LoopArgs.UB,
LoopArgs.ST, LoopArgs.Chunk);
RT.emitForStaticInit(*this, S.getBeginLoc(), S.getDirectiveKind(),
ScheduleKind, StaticInit);
}
auto &&CodeGenOrdered = [Ordered](CodeGenFunction &CGF, SourceLocation Loc,
const unsigned IVSize,
const bool IVSigned) {
if (Ordered) {
CGF.CGM.getOpenMPRuntime().emitForOrderedIterationEnd(CGF, Loc, IVSize,
IVSigned);
}
};
OMPLoopArguments OuterLoopArgs(LoopArgs.LB, LoopArgs.UB, LoopArgs.ST,
LoopArgs.IL, LoopArgs.Chunk, LoopArgs.EUB);
OuterLoopArgs.IncExpr = S.getInc();
OuterLoopArgs.Init = S.getInit();
OuterLoopArgs.Cond = S.getCond();
OuterLoopArgs.NextLB = S.getNextLowerBound();
OuterLoopArgs.NextUB = S.getNextUpperBound();
EmitOMPOuterLoop(DynamicOrOrdered, IsMonotonic, S, LoopScope, OuterLoopArgs,
emitOMPLoopBodyWithStopPoint, CodeGenOrdered);
}
static void emitEmptyOrdered(CodeGenFunction &, SourceLocation Loc,
const unsigned IVSize, const bool IVSigned) {}
void CodeGenFunction::EmitOMPDistributeOuterLoop(
OpenMPDistScheduleClauseKind ScheduleKind, const OMPLoopDirective &S,
OMPPrivateScope &LoopScope, const OMPLoopArguments &LoopArgs,
const CodeGenLoopTy &CodeGenLoopContent) {
CGOpenMPRuntime &RT = CGM.getOpenMPRuntime();
// Emit outer loop.
// Same behavior as a OMPForOuterLoop, except that schedule cannot be
// dynamic
//
const Expr *IVExpr = S.getIterationVariable();
const unsigned IVSize = getContext().getTypeSize(IVExpr->getType());
const bool IVSigned = IVExpr->getType()->hasSignedIntegerRepresentation();
CGOpenMPRuntime::StaticRTInput StaticInit(
IVSize, IVSigned, /* Ordered = */ false, LoopArgs.IL, LoopArgs.LB,
LoopArgs.UB, LoopArgs.ST, LoopArgs.Chunk);
RT.emitDistributeStaticInit(*this, S.getBeginLoc(), ScheduleKind, StaticInit);
// for combined 'distribute' and 'for' the increment expression of distribute
// is stored in DistInc. For 'distribute' alone, it is in Inc.
Expr *IncExpr;
if (isOpenMPLoopBoundSharingDirective(S.getDirectiveKind()))
IncExpr = S.getDistInc();
else
IncExpr = S.getInc();
// this routine is shared by 'omp distribute parallel for' and
// 'omp distribute': select the right EUB expression depending on the
// directive
OMPLoopArguments OuterLoopArgs;
OuterLoopArgs.LB = LoopArgs.LB;
OuterLoopArgs.UB = LoopArgs.UB;
OuterLoopArgs.ST = LoopArgs.ST;
OuterLoopArgs.IL = LoopArgs.IL;
OuterLoopArgs.Chunk = LoopArgs.Chunk;
OuterLoopArgs.EUB = isOpenMPLoopBoundSharingDirective(S.getDirectiveKind())
? S.getCombinedEnsureUpperBound()
: S.getEnsureUpperBound();
OuterLoopArgs.IncExpr = IncExpr;
OuterLoopArgs.Init = isOpenMPLoopBoundSharingDirective(S.getDirectiveKind())
? S.getCombinedInit()
: S.getInit();
OuterLoopArgs.Cond = isOpenMPLoopBoundSharingDirective(S.getDirectiveKind())
? S.getCombinedCond()
: S.getCond();
OuterLoopArgs.NextLB = isOpenMPLoopBoundSharingDirective(S.getDirectiveKind())
? S.getCombinedNextLowerBound()
: S.getNextLowerBound();
OuterLoopArgs.NextUB = isOpenMPLoopBoundSharingDirective(S.getDirectiveKind())
? S.getCombinedNextUpperBound()
: S.getNextUpperBound();
EmitOMPOuterLoop(/* DynamicOrOrdered = */ false, /* IsMonotonic = */ false, S,
LoopScope, OuterLoopArgs, CodeGenLoopContent,
emitEmptyOrdered);
}
static std::pair<LValue, LValue>
emitDistributeParallelForInnerBounds(CodeGenFunction &CGF,
const OMPExecutableDirective &S) {
const OMPLoopDirective &LS = cast<OMPLoopDirective>(S);
LValue LB =
EmitOMPHelperVar(CGF, cast<DeclRefExpr>(LS.getLowerBoundVariable()));
LValue UB =
EmitOMPHelperVar(CGF, cast<DeclRefExpr>(LS.getUpperBoundVariable()));
// When composing 'distribute' with 'for' (e.g. as in 'distribute
// parallel for') we need to use the 'distribute'
// chunk lower and upper bounds rather than the whole loop iteration
// space. These are parameters to the outlined function for 'parallel'
// and we copy the bounds of the previous schedule into the
// the current ones.
LValue PrevLB = CGF.EmitLValue(LS.getPrevLowerBoundVariable());
LValue PrevUB = CGF.EmitLValue(LS.getPrevUpperBoundVariable());
llvm::Value *PrevLBVal = CGF.EmitLoadOfScalar(
PrevLB, LS.getPrevLowerBoundVariable()->getExprLoc());
PrevLBVal = CGF.EmitScalarConversion(
PrevLBVal, LS.getPrevLowerBoundVariable()->getType(),
LS.getIterationVariable()->getType(),
LS.getPrevLowerBoundVariable()->getExprLoc());
llvm::Value *PrevUBVal = CGF.EmitLoadOfScalar(
PrevUB, LS.getPrevUpperBoundVariable()->getExprLoc());
PrevUBVal = CGF.EmitScalarConversion(
PrevUBVal, LS.getPrevUpperBoundVariable()->getType(),
LS.getIterationVariable()->getType(),
LS.getPrevUpperBoundVariable()->getExprLoc());
CGF.EmitStoreOfScalar(PrevLBVal, LB);
CGF.EmitStoreOfScalar(PrevUBVal, UB);
return {LB, UB};
}
/// if the 'for' loop has a dispatch schedule (e.g. dynamic, guided) then
/// we need to use the LB and UB expressions generated by the worksharing
/// code generation support, whereas in non combined situations we would
/// just emit 0 and the LastIteration expression
/// This function is necessary due to the difference of the LB and UB
/// types for the RT emission routines for 'for_static_init' and
/// 'for_dispatch_init'
static std::pair<llvm::Value *, llvm::Value *>
emitDistributeParallelForDispatchBounds(CodeGenFunction &CGF,
const OMPExecutableDirective &S,
Address LB, Address UB) {
const OMPLoopDirective &LS = cast<OMPLoopDirective>(S);
const Expr *IVExpr = LS.getIterationVariable();
// when implementing a dynamic schedule for a 'for' combined with a
// 'distribute' (e.g. 'distribute parallel for'), the 'for' loop
// is not normalized as each team only executes its own assigned
// distribute chunk
QualType IteratorTy = IVExpr->getType();
llvm::Value *LBVal =
CGF.EmitLoadOfScalar(LB, /*Volatile=*/false, IteratorTy, S.getBeginLoc());
llvm::Value *UBVal =
CGF.EmitLoadOfScalar(UB, /*Volatile=*/false, IteratorTy, S.getBeginLoc());
return {LBVal, UBVal};
}
static void emitDistributeParallelForDistributeInnerBoundParams(
CodeGenFunction &CGF, const OMPExecutableDirective &S,
llvm::SmallVectorImpl<llvm::Value *> &CapturedVars) {
const auto &Dir = cast<OMPLoopDirective>(S);
LValue LB =
CGF.EmitLValue(cast<DeclRefExpr>(Dir.getCombinedLowerBoundVariable()));
llvm::Value *LBCast =
CGF.Builder.CreateIntCast(CGF.Builder.CreateLoad(LB.getAddress(CGF)),
CGF.SizeTy, /*isSigned=*/false);
CapturedVars.push_back(LBCast);
LValue UB =
CGF.EmitLValue(cast<DeclRefExpr>(Dir.getCombinedUpperBoundVariable()));
llvm::Value *UBCast =
CGF.Builder.CreateIntCast(CGF.Builder.CreateLoad(UB.getAddress(CGF)),
CGF.SizeTy, /*isSigned=*/false);
CapturedVars.push_back(UBCast);
}
static void
emitInnerParallelForWhenCombined(CodeGenFunction &CGF,
const OMPLoopDirective &S,
CodeGenFunction::JumpDest LoopExit) {
auto &&CGInlinedWorksharingLoop = [&S](CodeGenFunction &CGF,
PrePostActionTy &Action) {
Action.Enter(CGF);
bool HasCancel = false;
if (!isOpenMPSimdDirective(S.getDirectiveKind())) {
if (const auto *D = dyn_cast<OMPTeamsDistributeParallelForDirective>(&S))
HasCancel = D->hasCancel();
else if (const auto *D = dyn_cast<OMPDistributeParallelForDirective>(&S))
HasCancel = D->hasCancel();
else if (const auto *D =
dyn_cast<OMPTargetTeamsDistributeParallelForDirective>(&S))
HasCancel = D->hasCancel();
}
CodeGenFunction::OMPCancelStackRAII CancelRegion(CGF, S.getDirectiveKind(),
HasCancel);
CGF.EmitOMPWorksharingLoop(S, S.getPrevEnsureUpperBound(),
emitDistributeParallelForInnerBounds,
emitDistributeParallelForDispatchBounds);
};
emitCommonOMPParallelDirective(
CGF, S,
isOpenMPSimdDirective(S.getDirectiveKind()) ? OMPD_for_simd : OMPD_for,
CGInlinedWorksharingLoop,
emitDistributeParallelForDistributeInnerBoundParams);
}
void CodeGenFunction::EmitOMPDistributeParallelForDirective(
const OMPDistributeParallelForDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &) {
CGF.EmitOMPDistributeLoop(S, emitInnerParallelForWhenCombined,
S.getDistInc());
};
OMPLexicalScope Scope(*this, S, OMPD_parallel);
CGM.getOpenMPRuntime().emitInlinedDirective(*this, OMPD_distribute, CodeGen);
}
void CodeGenFunction::EmitOMPDistributeParallelForSimdDirective(
const OMPDistributeParallelForSimdDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &) {
CGF.EmitOMPDistributeLoop(S, emitInnerParallelForWhenCombined,
S.getDistInc());
};
OMPLexicalScope Scope(*this, S, OMPD_parallel);
CGM.getOpenMPRuntime().emitInlinedDirective(*this, OMPD_distribute, CodeGen);
}
void CodeGenFunction::EmitOMPDistributeSimdDirective(
const OMPDistributeSimdDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &) {
CGF.EmitOMPDistributeLoop(S, emitOMPLoopBodyWithStopPoint, S.getInc());
};
OMPLexicalScope Scope(*this, S, OMPD_unknown);
CGM.getOpenMPRuntime().emitInlinedDirective(*this, OMPD_simd, CodeGen);
}
void CodeGenFunction::EmitOMPTargetSimdDeviceFunction(
CodeGenModule &CGM, StringRef ParentName, const OMPTargetSimdDirective &S) {
// Emit SPMD target parallel for region as a standalone region.
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitOMPSimdRegion(CGF, S, Action);
};
llvm::Function *Fn;
llvm::Constant *Addr;
// Emit target region as a standalone region.
CGM.getOpenMPRuntime().emitTargetOutlinedFunction(
S, ParentName, Fn, Addr, /*IsOffloadEntry=*/true, CodeGen);
assert(Fn && Addr && "Target device function emission failed.");
}
void CodeGenFunction::EmitOMPTargetSimdDirective(
const OMPTargetSimdDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitOMPSimdRegion(CGF, S, Action);
};
emitCommonOMPTargetDirective(*this, S, CodeGen);
}
namespace {
struct ScheduleKindModifiersTy {
OpenMPScheduleClauseKind Kind;
OpenMPScheduleClauseModifier M1;
OpenMPScheduleClauseModifier M2;
ScheduleKindModifiersTy(OpenMPScheduleClauseKind Kind,
OpenMPScheduleClauseModifier M1,
OpenMPScheduleClauseModifier M2)
: Kind(Kind), M1(M1), M2(M2) {}
};
} // namespace
bool CodeGenFunction::EmitOMPWorksharingLoop(
const OMPLoopDirective &S, Expr *EUB,
const CodeGenLoopBoundsTy &CodeGenLoopBounds,
const CodeGenDispatchBoundsTy &CGDispatchBounds) {
// Emit the loop iteration variable.
const auto *IVExpr = cast<DeclRefExpr>(S.getIterationVariable());
const auto *IVDecl = cast<VarDecl>(IVExpr->getDecl());
EmitVarDecl(*IVDecl);
// Emit the iterations count variable.
// If it is not a variable, Sema decided to calculate iterations count on each
// iteration (e.g., it is foldable into a constant).
if (const auto *LIExpr = dyn_cast<DeclRefExpr>(S.getLastIteration())) {
EmitVarDecl(*cast<VarDecl>(LIExpr->getDecl()));
// Emit calculation of the iterations count.
EmitIgnoredExpr(S.getCalcLastIteration());
}
CGOpenMPRuntime &RT = CGM.getOpenMPRuntime();
bool HasLastprivateClause;
// Check pre-condition.
{
OMPLoopScope PreInitScope(*this, S);
// Skip the entire loop if we don't meet the precondition.
// If the condition constant folds and can be elided, avoid emitting the
// whole loop.
bool CondConstant;
llvm::BasicBlock *ContBlock = nullptr;
if (ConstantFoldsToSimpleInteger(S.getPreCond(), CondConstant)) {
if (!CondConstant)
return false;
} else {
llvm::BasicBlock *ThenBlock = createBasicBlock("omp.precond.then");
ContBlock = createBasicBlock("omp.precond.end");
emitPreCond(*this, S, S.getPreCond(), ThenBlock, ContBlock,
getProfileCount(&S));
EmitBlock(ThenBlock);
incrementProfileCounter(&S);
}
RunCleanupsScope DoacrossCleanupScope(*this);
bool Ordered = false;
if (const auto *OrderedClause = S.getSingleClause<OMPOrderedClause>()) {
if (OrderedClause->getNumForLoops())
RT.emitDoacrossInit(*this, S, OrderedClause->getLoopNumIterations());
else
Ordered = true;
}
llvm::DenseSet<const Expr *> EmittedFinals;
emitAlignedClause(*this, S);
bool HasLinears = EmitOMPLinearClauseInit(S);
// Emit helper vars inits.
std::pair<LValue, LValue> Bounds = CodeGenLoopBounds(*this, S);
LValue LB = Bounds.first;
LValue UB = Bounds.second;
LValue ST =
EmitOMPHelperVar(*this, cast<DeclRefExpr>(S.getStrideVariable()));
LValue IL =
EmitOMPHelperVar(*this, cast<DeclRefExpr>(S.getIsLastIterVariable()));
// Emit 'then' code.
{
OMPPrivateScope LoopScope(*this);
if (EmitOMPFirstprivateClause(S, LoopScope) || HasLinears) {
// Emit implicit barrier to synchronize threads and avoid data races on
// initialization of firstprivate variables and post-update of
// lastprivate variables.
CGM.getOpenMPRuntime().emitBarrierCall(
*this, S.getBeginLoc(), OMPD_unknown, /*EmitChecks=*/false,
/*ForceSimpleCall=*/true);
}
EmitOMPPrivateClause(S, LoopScope);
CGOpenMPRuntime::LastprivateConditionalRAII LPCRegion(
*this, S, EmitLValue(S.getIterationVariable()));
HasLastprivateClause = EmitOMPLastprivateClauseInit(S, LoopScope);
EmitOMPReductionClauseInit(S, LoopScope);
EmitOMPPrivateLoopCounters(S, LoopScope);
EmitOMPLinearClause(S, LoopScope);
(void)LoopScope.Privatize();
if (isOpenMPTargetExecutionDirective(S.getDirectiveKind()))
CGM.getOpenMPRuntime().adjustTargetSpecificDataForLambdas(*this, S);
// Detect the loop schedule kind and chunk.
const Expr *ChunkExpr = nullptr;
OpenMPScheduleTy ScheduleKind;
if (const auto *C = S.getSingleClause<OMPScheduleClause>()) {
ScheduleKind.Schedule = C->getScheduleKind();
ScheduleKind.M1 = C->getFirstScheduleModifier();
ScheduleKind.M2 = C->getSecondScheduleModifier();
ChunkExpr = C->getChunkSize();
} else {
// Default behaviour for schedule clause.
CGM.getOpenMPRuntime().getDefaultScheduleAndChunk(
*this, S, ScheduleKind.Schedule, ChunkExpr);
}
bool HasChunkSizeOne = false;
llvm::Value *Chunk = nullptr;
if (ChunkExpr) {
Chunk = EmitScalarExpr(ChunkExpr);
Chunk = EmitScalarConversion(Chunk, ChunkExpr->getType(),
S.getIterationVariable()->getType(),
S.getBeginLoc());
Expr::EvalResult Result;
if (ChunkExpr->EvaluateAsInt(Result, getContext())) {
llvm::APSInt EvaluatedChunk = Result.Val.getInt();
HasChunkSizeOne = (EvaluatedChunk.getLimitedValue() == 1);
}
}
const unsigned IVSize = getContext().getTypeSize(IVExpr->getType());
const bool IVSigned = IVExpr->getType()->hasSignedIntegerRepresentation();
// OpenMP 4.5, 2.7.1 Loop Construct, Description.
// If the static schedule kind is specified or if the ordered clause is
// specified, and if no monotonic modifier is specified, the effect will
// be as if the monotonic modifier was specified.
bool StaticChunkedOne = RT.isStaticChunked(ScheduleKind.Schedule,
/* Chunked */ Chunk != nullptr) && HasChunkSizeOne &&
isOpenMPLoopBoundSharingDirective(S.getDirectiveKind());
bool IsMonotonic =
Ordered ||
(ScheduleKind.Schedule == OMPC_SCHEDULE_static &&
!(ScheduleKind.M1 == OMPC_SCHEDULE_MODIFIER_nonmonotonic ||
ScheduleKind.M2 == OMPC_SCHEDULE_MODIFIER_nonmonotonic)) ||
ScheduleKind.M1 == OMPC_SCHEDULE_MODIFIER_monotonic ||
ScheduleKind.M2 == OMPC_SCHEDULE_MODIFIER_monotonic;
if ((RT.isStaticNonchunked(ScheduleKind.Schedule,
/* Chunked */ Chunk != nullptr) ||
StaticChunkedOne) &&
!Ordered) {
JumpDest LoopExit =
getJumpDestInCurrentScope(createBasicBlock("omp.loop.exit"));
emitCommonSimdLoop(
*this, S,
[&S](CodeGenFunction &CGF, PrePostActionTy &) {
if (isOpenMPSimdDirective(S.getDirectiveKind())) {
CGF.EmitOMPSimdInit(S);
} else if (const auto *C = S.getSingleClause<OMPOrderClause>()) {
if (C->getKind() == OMPC_ORDER_concurrent)
CGF.LoopStack.setParallel(/*Enable=*/true);
}
},
[IVSize, IVSigned, Ordered, IL, LB, UB, ST, StaticChunkedOne, Chunk,
&S, ScheduleKind, LoopExit,
&LoopScope](CodeGenFunction &CGF, PrePostActionTy &) {
// OpenMP [2.7.1, Loop Construct, Description, table 2-1]
// When no chunk_size is specified, the iteration space is divided
// into chunks that are approximately equal in size, and at most
// one chunk is distributed to each thread. Note that the size of
// the chunks is unspecified in this case.
CGOpenMPRuntime::StaticRTInput StaticInit(
IVSize, IVSigned, Ordered, IL.getAddress(CGF),
LB.getAddress(CGF), UB.getAddress(CGF), ST.getAddress(CGF),
StaticChunkedOne ? Chunk : nullptr);
CGF.CGM.getOpenMPRuntime().emitForStaticInit(
CGF, S.getBeginLoc(), S.getDirectiveKind(), ScheduleKind,
StaticInit);
// UB = min(UB, GlobalUB);
if (!StaticChunkedOne)
CGF.EmitIgnoredExpr(S.getEnsureUpperBound());
// IV = LB;
CGF.EmitIgnoredExpr(S.getInit());
// For unchunked static schedule generate:
//
// while (idx <= UB) {
// BODY;
// ++idx;
// }
//
// For static schedule with chunk one:
//
// while (IV <= PrevUB) {
// BODY;
// IV += ST;
// }
CGF.EmitOMPInnerLoop(
S, LoopScope.requiresCleanups(),
StaticChunkedOne ? S.getCombinedParForInDistCond()
: S.getCond(),
StaticChunkedOne ? S.getDistInc() : S.getInc(),
[&S, LoopExit](CodeGenFunction &CGF) {
emitOMPLoopBodyWithStopPoint(CGF, S, LoopExit);
},
[](CodeGenFunction &) {});
});
EmitBlock(LoopExit.getBlock());
// Tell the runtime we are done.
auto &&CodeGen = [&S](CodeGenFunction &CGF) {
CGF.CGM.getOpenMPRuntime().emitForStaticFinish(CGF, S.getEndLoc(),
S.getDirectiveKind());
};
OMPCancelStack.emitExit(*this, S.getDirectiveKind(), CodeGen);
} else {
// Emit the outer loop, which requests its work chunk [LB..UB] from
// runtime and runs the inner loop to process it.
const OMPLoopArguments LoopArguments(
LB.getAddress(*this), UB.getAddress(*this), ST.getAddress(*this),
IL.getAddress(*this), Chunk, EUB);
EmitOMPForOuterLoop(ScheduleKind, IsMonotonic, S, LoopScope, Ordered,
LoopArguments, CGDispatchBounds);
}
if (isOpenMPSimdDirective(S.getDirectiveKind())) {
EmitOMPSimdFinal(S, [IL, &S](CodeGenFunction &CGF) {
return CGF.Builder.CreateIsNotNull(
CGF.EmitLoadOfScalar(IL, S.getBeginLoc()));
});
}
EmitOMPReductionClauseFinal(
S, /*ReductionKind=*/isOpenMPSimdDirective(S.getDirectiveKind())
? /*Parallel and Simd*/ OMPD_parallel_for_simd
: /*Parallel only*/ OMPD_parallel);
// Emit post-update of the reduction variables if IsLastIter != 0.
emitPostUpdateForReductionClause(
*this, S, [IL, &S](CodeGenFunction &CGF) {
return CGF.Builder.CreateIsNotNull(
CGF.EmitLoadOfScalar(IL, S.getBeginLoc()));
});
// Emit final copy of the lastprivate variables if IsLastIter != 0.
if (HasLastprivateClause)
EmitOMPLastprivateClauseFinal(
S, isOpenMPSimdDirective(S.getDirectiveKind()),
Builder.CreateIsNotNull(EmitLoadOfScalar(IL, S.getBeginLoc())));
}
EmitOMPLinearClauseFinal(S, [IL, &S](CodeGenFunction &CGF) {
return CGF.Builder.CreateIsNotNull(
CGF.EmitLoadOfScalar(IL, S.getBeginLoc()));
});
DoacrossCleanupScope.ForceCleanup();
// We're now done with the loop, so jump to the continuation block.
if (ContBlock) {
EmitBranch(ContBlock);
EmitBlock(ContBlock, /*IsFinished=*/true);
}
}
return HasLastprivateClause;
}
/// The following two functions generate expressions for the loop lower
/// and upper bounds in case of static and dynamic (dispatch) schedule
/// of the associated 'for' or 'distribute' loop.
static std::pair<LValue, LValue>
emitForLoopBounds(CodeGenFunction &CGF, const OMPExecutableDirective &S) {
const auto &LS = cast<OMPLoopDirective>(S);
LValue LB =
EmitOMPHelperVar(CGF, cast<DeclRefExpr>(LS.getLowerBoundVariable()));
LValue UB =
EmitOMPHelperVar(CGF, cast<DeclRefExpr>(LS.getUpperBoundVariable()));
return {LB, UB};
}
/// When dealing with dispatch schedules (e.g. dynamic, guided) we do not
/// consider the lower and upper bound expressions generated by the
/// worksharing loop support, but we use 0 and the iteration space size as
/// constants
static std::pair<llvm::Value *, llvm::Value *>
emitDispatchForLoopBounds(CodeGenFunction &CGF, const OMPExecutableDirective &S,
Address LB, Address UB) {
const auto &LS = cast<OMPLoopDirective>(S);
const Expr *IVExpr = LS.getIterationVariable();
const unsigned IVSize = CGF.getContext().getTypeSize(IVExpr->getType());
llvm::Value *LBVal = CGF.Builder.getIntN(IVSize, 0);
llvm::Value *UBVal = CGF.EmitScalarExpr(LS.getLastIteration());
return {LBVal, UBVal};
}
/// Emits internal temp array declarations for the directive with inscan
/// reductions.
/// The code is the following:
/// \code
/// size num_iters = <num_iters>;
/// <type> buffer[num_iters];
/// \endcode
static void emitScanBasedDirectiveDecls(
CodeGenFunction &CGF, const OMPLoopDirective &S,
llvm::function_ref<llvm::Value *(CodeGenFunction &)> NumIteratorsGen) {
llvm::Value *OMPScanNumIterations = CGF.Builder.CreateIntCast(
NumIteratorsGen(CGF), CGF.SizeTy, /*isSigned=*/false);
SmallVector<const Expr *, 4> Shareds;
SmallVector<const Expr *, 4> Privates;
SmallVector<const Expr *, 4> ReductionOps;
SmallVector<const Expr *, 4> CopyArrayTemps;
for (const auto *C : S.getClausesOfKind<OMPReductionClause>()) {
assert(C->getModifier() == OMPC_REDUCTION_inscan &&
"Only inscan reductions are expected.");
Shareds.append(C->varlist_begin(), C->varlist_end());
Privates.append(C->privates().begin(), C->privates().end());
ReductionOps.append(C->reduction_ops().begin(), C->reduction_ops().end());
CopyArrayTemps.append(C->copy_array_temps().begin(),
C->copy_array_temps().end());
}
{
// Emit buffers for each reduction variables.
// ReductionCodeGen is required to emit correctly the code for array
// reductions.
ReductionCodeGen RedCG(Shareds, Shareds, Privates, ReductionOps);
unsigned Count = 0;
auto *ITA = CopyArrayTemps.begin();
for (const Expr *IRef : Privates) {
const auto *PrivateVD = cast<VarDecl>(cast<DeclRefExpr>(IRef)->getDecl());
// Emit variably modified arrays, used for arrays/array sections
// reductions.
if (PrivateVD->getType()->isVariablyModifiedType()) {
RedCG.emitSharedOrigLValue(CGF, Count);
RedCG.emitAggregateType(CGF, Count);
}
CodeGenFunction::OpaqueValueMapping DimMapping(
CGF,
cast<OpaqueValueExpr>(
cast<VariableArrayType>((*ITA)->getType()->getAsArrayTypeUnsafe())
->getSizeExpr()),
RValue::get(OMPScanNumIterations));
// Emit temp buffer.
CGF.EmitVarDecl(*cast<VarDecl>(cast<DeclRefExpr>(*ITA)->getDecl()));
++ITA;
++Count;
}
}
}
/// Emits the code for the directive with inscan reductions.
/// The code is the following:
/// \code
/// #pragma omp ...
/// for (i: 0..<num_iters>) {
/// <input phase>;
/// buffer[i] = red;
/// }
/// #pragma omp master // in parallel region
/// for (int k = 0; k != ceil(log2(num_iters)); ++k)
/// for (size cnt = last_iter; cnt >= pow(2, k); --k)
/// buffer[i] op= buffer[i-pow(2,k)];
/// #pragma omp barrier // in parallel region
/// #pragma omp ...
/// for (0..<num_iters>) {
/// red = InclusiveScan ? buffer[i] : buffer[i-1];
/// <scan phase>;
/// }
/// \endcode
static void emitScanBasedDirective(
CodeGenFunction &CGF, const OMPLoopDirective &S,
llvm::function_ref<llvm::Value *(CodeGenFunction &)> NumIteratorsGen,
llvm::function_ref<void(CodeGenFunction &)> FirstGen,
llvm::function_ref<void(CodeGenFunction &)> SecondGen) {
llvm::Value *OMPScanNumIterations = CGF.Builder.CreateIntCast(
NumIteratorsGen(CGF), CGF.SizeTy, /*isSigned=*/false);
SmallVector<const Expr *, 4> Privates;
SmallVector<const Expr *, 4> ReductionOps;
SmallVector<const Expr *, 4> LHSs;
SmallVector<const Expr *, 4> RHSs;
SmallVector<const Expr *, 4> CopyArrayElems;
for (const auto *C : S.getClausesOfKind<OMPReductionClause>()) {
assert(C->getModifier() == OMPC_REDUCTION_inscan &&
"Only inscan reductions are expected.");
Privates.append(C->privates().begin(), C->privates().end());
ReductionOps.append(C->reduction_ops().begin(), C->reduction_ops().end());
LHSs.append(C->lhs_exprs().begin(), C->lhs_exprs().end());
RHSs.append(C->rhs_exprs().begin(), C->rhs_exprs().end());
CopyArrayElems.append(C->copy_array_elems().begin(),
C->copy_array_elems().end());
}
CodeGenFunction::ParentLoopDirectiveForScanRegion ScanRegion(CGF, S);
{
// Emit loop with input phase:
// #pragma omp ...
// for (i: 0..<num_iters>) {
// <input phase>;
// buffer[i] = red;
// }
CGF.OMPFirstScanLoop = true;
CodeGenFunction::OMPLocalDeclMapRAII Scope(CGF);
FirstGen(CGF);
}
// #pragma omp barrier // in parallel region
auto &&CodeGen = [&S, OMPScanNumIterations, &LHSs, &RHSs, &CopyArrayElems,
&ReductionOps,
&Privates](CodeGenFunction &CGF, PrePostActionTy &Action) {
Action.Enter(CGF);
// Emit prefix reduction:
// #pragma omp master // in parallel region
// for (int k = 0; k <= ceil(log2(n)); ++k)
llvm::BasicBlock *InputBB = CGF.Builder.GetInsertBlock();
llvm::BasicBlock *LoopBB = CGF.createBasicBlock("omp.outer.log.scan.body");
llvm::BasicBlock *ExitBB = CGF.createBasicBlock("omp.outer.log.scan.exit");
llvm::Function *F =
CGF.CGM.getIntrinsic(llvm::Intrinsic::log2, CGF.DoubleTy);
llvm::Value *Arg =
CGF.Builder.CreateUIToFP(OMPScanNumIterations, CGF.DoubleTy);
llvm::Value *LogVal = CGF.EmitNounwindRuntimeCall(F, Arg);
F = CGF.CGM.getIntrinsic(llvm::Intrinsic::ceil, CGF.DoubleTy);
LogVal = CGF.EmitNounwindRuntimeCall(F, LogVal);
LogVal = CGF.Builder.CreateFPToUI(LogVal, CGF.IntTy);
llvm::Value *NMin1 = CGF.Builder.CreateNUWSub(
OMPScanNumIterations, llvm::ConstantInt::get(CGF.SizeTy, 1));
auto DL = ApplyDebugLocation::CreateDefaultArtificial(CGF, S.getBeginLoc());
CGF.EmitBlock(LoopBB);
auto *Counter = CGF.Builder.CreatePHI(CGF.IntTy, 2);
// size pow2k = 1;
auto *Pow2K = CGF.Builder.CreatePHI(CGF.SizeTy, 2);
Counter->addIncoming(llvm::ConstantInt::get(CGF.IntTy, 0), InputBB);
Pow2K->addIncoming(llvm::ConstantInt::get(CGF.SizeTy, 1), InputBB);
// for (size i = n - 1; i >= 2 ^ k; --i)
// tmp[i] op= tmp[i-pow2k];
llvm::BasicBlock *InnerLoopBB =
CGF.createBasicBlock("omp.inner.log.scan.body");
llvm::BasicBlock *InnerExitBB =
CGF.createBasicBlock("omp.inner.log.scan.exit");
llvm::Value *CmpI = CGF.Builder.CreateICmpUGE(NMin1, Pow2K);
CGF.Builder.CreateCondBr(CmpI, InnerLoopBB, InnerExitBB);
CGF.EmitBlock(InnerLoopBB);
auto *IVal = CGF.Builder.CreatePHI(CGF.SizeTy, 2);
IVal->addIncoming(NMin1, LoopBB);
{
CodeGenFunction::OMPPrivateScope PrivScope(CGF);
auto *ILHS = LHSs.begin();
auto *IRHS = RHSs.begin();
for (const Expr *CopyArrayElem : CopyArrayElems) {
const auto *LHSVD = cast<VarDecl>(cast<DeclRefExpr>(*ILHS)->getDecl());
const auto *RHSVD = cast<VarDecl>(cast<DeclRefExpr>(*IRHS)->getDecl());
Address LHSAddr = Address::invalid();
{
CodeGenFunction::OpaqueValueMapping IdxMapping(
CGF,
cast<OpaqueValueExpr>(
cast<ArraySubscriptExpr>(CopyArrayElem)->getIdx()),
RValue::get(IVal));
LHSAddr = CGF.EmitLValue(CopyArrayElem).getAddress(CGF);
}
PrivScope.addPrivate(LHSVD, [LHSAddr]() { return LHSAddr; });
Address RHSAddr = Address::invalid();
{
llvm::Value *OffsetIVal = CGF.Builder.CreateNUWSub(IVal, Pow2K);
CodeGenFunction::OpaqueValueMapping IdxMapping(
CGF,
cast<OpaqueValueExpr>(
cast<ArraySubscriptExpr>(CopyArrayElem)->getIdx()),
RValue::get(OffsetIVal));
RHSAddr = CGF.EmitLValue(CopyArrayElem).getAddress(CGF);
}
PrivScope.addPrivate(RHSVD, [RHSAddr]() { return RHSAddr; });
++ILHS;
++IRHS;
}
PrivScope.Privatize();
CGF.CGM.getOpenMPRuntime().emitReduction(
CGF, S.getEndLoc(), Privates, LHSs, RHSs, ReductionOps,
{/*WithNowait=*/true, /*SimpleReduction=*/true, OMPD_unknown});
}
llvm::Value *NextIVal =
CGF.Builder.CreateNUWSub(IVal, llvm::ConstantInt::get(CGF.SizeTy, 1));
IVal->addIncoming(NextIVal, CGF.Builder.GetInsertBlock());
CmpI = CGF.Builder.CreateICmpUGE(NextIVal, Pow2K);
CGF.Builder.CreateCondBr(CmpI, InnerLoopBB, InnerExitBB);
CGF.EmitBlock(InnerExitBB);
llvm::Value *Next =
CGF.Builder.CreateNUWAdd(Counter, llvm::ConstantInt::get(CGF.IntTy, 1));
Counter->addIncoming(Next, CGF.Builder.GetInsertBlock());
// pow2k <<= 1;
llvm::Value *NextPow2K =
CGF.Builder.CreateShl(Pow2K, 1, "", /*HasNUW=*/true);
Pow2K->addIncoming(NextPow2K, CGF.Builder.GetInsertBlock());
llvm::Value *Cmp = CGF.Builder.CreateICmpNE(Next, LogVal);
CGF.Builder.CreateCondBr(Cmp, LoopBB, ExitBB);
auto DL1 = ApplyDebugLocation::CreateDefaultArtificial(CGF, S.getEndLoc());
CGF.EmitBlock(ExitBB);
};
if (isOpenMPParallelDirective(S.getDirectiveKind())) {
CGF.CGM.getOpenMPRuntime().emitMasterRegion(CGF, CodeGen, S.getBeginLoc());
CGF.CGM.getOpenMPRuntime().emitBarrierCall(
CGF, S.getBeginLoc(), OMPD_unknown, /*EmitChecks=*/false,
/*ForceSimpleCall=*/true);
} else {
RegionCodeGenTy RCG(CodeGen);
RCG(CGF);
}
CGF.OMPFirstScanLoop = false;
SecondGen(CGF);
}
static bool emitWorksharingDirective(CodeGenFunction &CGF,
const OMPLoopDirective &S,
bool HasCancel) {
bool HasLastprivates;
if (llvm::any_of(S.getClausesOfKind<OMPReductionClause>(),
[](const OMPReductionClause *C) {
return C->getModifier() == OMPC_REDUCTION_inscan;
})) {
const auto &&NumIteratorsGen = [&S](CodeGenFunction &CGF) {
CodeGenFunction::OMPLocalDeclMapRAII Scope(CGF);
OMPLoopScope LoopScope(CGF, S);
return CGF.EmitScalarExpr(S.getNumIterations());
};
const auto &&FirstGen = [&S, HasCancel](CodeGenFunction &CGF) {
CodeGenFunction::OMPCancelStackRAII CancelRegion(
CGF, S.getDirectiveKind(), HasCancel);
(void)CGF.EmitOMPWorksharingLoop(S, S.getEnsureUpperBound(),
emitForLoopBounds,
emitDispatchForLoopBounds);
// Emit an implicit barrier at the end.
CGF.CGM.getOpenMPRuntime().emitBarrierCall(CGF, S.getBeginLoc(),
OMPD_for);
};
const auto &&SecondGen = [&S, HasCancel,
&HasLastprivates](CodeGenFunction &CGF) {
CodeGenFunction::OMPCancelStackRAII CancelRegion(
CGF, S.getDirectiveKind(), HasCancel);
HasLastprivates = CGF.EmitOMPWorksharingLoop(S, S.getEnsureUpperBound(),
emitForLoopBounds,
emitDispatchForLoopBounds);
};
if (!isOpenMPParallelDirective(S.getDirectiveKind()))
emitScanBasedDirectiveDecls(CGF, S, NumIteratorsGen);
emitScanBasedDirective(CGF, S, NumIteratorsGen, FirstGen, SecondGen);
} else {
CodeGenFunction::OMPCancelStackRAII CancelRegion(CGF, S.getDirectiveKind(),
HasCancel);
HasLastprivates = CGF.EmitOMPWorksharingLoop(S, S.getEnsureUpperBound(),
emitForLoopBounds,
emitDispatchForLoopBounds);
}
return HasLastprivates;
}
static bool isSupportedByOpenMPIRBuilder(const OMPForDirective &S) {
if (S.hasCancel())
return false;
for (OMPClause *C : S.clauses())
if (!isa<OMPNowaitClause>(C))
return false;
return true;
}
void CodeGenFunction::EmitOMPForDirective(const OMPForDirective &S) {
bool HasLastprivates = false;
bool UseOMPIRBuilder =
CGM.getLangOpts().OpenMPIRBuilder && isSupportedByOpenMPIRBuilder(S);
auto &&CodeGen = [this, &S, &HasLastprivates,
UseOMPIRBuilder](CodeGenFunction &CGF, PrePostActionTy &) {
// Use the OpenMPIRBuilder if enabled.
if (UseOMPIRBuilder) {
// Emit the associated statement and get its loop representation.
const Stmt *Inner = S.getRawStmt();
llvm::CanonicalLoopInfo *CLI =
EmitOMPCollapsedCanonicalLoopNest(Inner, 1);
bool NeedsBarrier = !S.getSingleClause<OMPNowaitClause>();
llvm::OpenMPIRBuilder &OMPBuilder =
CGM.getOpenMPRuntime().getOMPBuilder();
llvm::OpenMPIRBuilder::InsertPointTy AllocaIP(
AllocaInsertPt->getParent(), AllocaInsertPt->getIterator());
OMPBuilder.createWorkshareLoop(Builder, CLI, AllocaIP, NeedsBarrier);
return;
}
HasLastprivates = emitWorksharingDirective(CGF, S, S.hasCancel());
};
{
auto LPCRegion =
CGOpenMPRuntime::LastprivateConditionalRAII::disable(*this, S);
OMPLexicalScope Scope(*this, S, OMPD_unknown);
CGM.getOpenMPRuntime().emitInlinedDirective(*this, OMPD_for, CodeGen,
S.hasCancel());
}
if (!UseOMPIRBuilder) {
// Emit an implicit barrier at the end.
if (!S.getSingleClause<OMPNowaitClause>() || HasLastprivates)
CGM.getOpenMPRuntime().emitBarrierCall(*this, S.getBeginLoc(), OMPD_for);
}
// Check for outer lastprivate conditional update.
checkForLastprivateConditionalUpdate(*this, S);
}
void CodeGenFunction::EmitOMPForSimdDirective(const OMPForSimdDirective &S) {
bool HasLastprivates = false;
auto &&CodeGen = [&S, &HasLastprivates](CodeGenFunction &CGF,
PrePostActionTy &) {
HasLastprivates = emitWorksharingDirective(CGF, S, /*HasCancel=*/false);
};
{
auto LPCRegion =
CGOpenMPRuntime::LastprivateConditionalRAII::disable(*this, S);
OMPLexicalScope Scope(*this, S, OMPD_unknown);
CGM.getOpenMPRuntime().emitInlinedDirective(*this, OMPD_simd, CodeGen);
}
// Emit an implicit barrier at the end.
if (!S.getSingleClause<OMPNowaitClause>() || HasLastprivates)
CGM.getOpenMPRuntime().emitBarrierCall(*this, S.getBeginLoc(), OMPD_for);
// Check for outer lastprivate conditional update.
checkForLastprivateConditionalUpdate(*this, S);
}
static LValue createSectionLVal(CodeGenFunction &CGF, QualType Ty,
const Twine &Name,
llvm::Value *Init = nullptr) {
LValue LVal = CGF.MakeAddrLValue(CGF.CreateMemTemp(Ty, Name), Ty);
if (Init)
CGF.EmitStoreThroughLValue(RValue::get(Init), LVal, /*isInit*/ true);
return LVal;
}
void CodeGenFunction::EmitSections(const OMPExecutableDirective &S) {
const Stmt *CapturedStmt = S.getInnermostCapturedStmt()->getCapturedStmt();
const auto *CS = dyn_cast<CompoundStmt>(CapturedStmt);
bool HasLastprivates = false;
auto &&CodeGen = [&S, CapturedStmt, CS,
&HasLastprivates](CodeGenFunction &CGF, PrePostActionTy &) {
const ASTContext &C = CGF.getContext();
QualType KmpInt32Ty =
C.getIntTypeForBitwidth(/*DestWidth=*/32, /*Signed=*/1);
// Emit helper vars inits.
LValue LB = createSectionLVal(CGF, KmpInt32Ty, ".omp.sections.lb.",
CGF.Builder.getInt32(0));
llvm::ConstantInt *GlobalUBVal = CS != nullptr
? CGF.Builder.getInt32(CS->size() - 1)
: CGF.Builder.getInt32(0);
LValue UB =
createSectionLVal(CGF, KmpInt32Ty, ".omp.sections.ub.", GlobalUBVal);
LValue ST = createSectionLVal(CGF, KmpInt32Ty, ".omp.sections.st.",
CGF.Builder.getInt32(1));
LValue IL = createSectionLVal(CGF, KmpInt32Ty, ".omp.sections.il.",
CGF.Builder.getInt32(0));
// Loop counter.
LValue IV = createSectionLVal(CGF, KmpInt32Ty, ".omp.sections.iv.");
OpaqueValueExpr IVRefExpr(S.getBeginLoc(), KmpInt32Ty, VK_LValue);
CodeGenFunction::OpaqueValueMapping OpaqueIV(CGF, &IVRefExpr, IV);
OpaqueValueExpr UBRefExpr(S.getBeginLoc(), KmpInt32Ty, VK_LValue);
CodeGenFunction::OpaqueValueMapping OpaqueUB(CGF, &UBRefExpr, UB);
// Generate condition for loop.
BinaryOperator *Cond = BinaryOperator::Create(
C, &IVRefExpr, &UBRefExpr, BO_LE, C.BoolTy, VK_PRValue, OK_Ordinary,
S.getBeginLoc(), FPOptionsOverride());
// Increment for loop counter.
UnaryOperator *Inc = UnaryOperator::Create(
C, &IVRefExpr, UO_PreInc, KmpInt32Ty, VK_PRValue, OK_Ordinary,
S.getBeginLoc(), true, FPOptionsOverride());
auto &&BodyGen = [CapturedStmt, CS, &S, &IV](CodeGenFunction &CGF) {
// Iterate through all sections and emit a switch construct:
// switch (IV) {
// case 0:
// <SectionStmt[0]>;
// break;
// ...
// case <NumSection> - 1:
// <SectionStmt[<NumSection> - 1]>;
// break;
// }
// .omp.sections.exit:
llvm::BasicBlock *ExitBB = CGF.createBasicBlock(".omp.sections.exit");
llvm::SwitchInst *SwitchStmt =
CGF.Builder.CreateSwitch(CGF.EmitLoadOfScalar(IV, S.getBeginLoc()),
ExitBB, CS == nullptr ? 1 : CS->size());
if (CS) {
unsigned CaseNumber = 0;
for (const Stmt *SubStmt : CS->children()) {
auto CaseBB = CGF.createBasicBlock(".omp.sections.case");
CGF.EmitBlock(CaseBB);
SwitchStmt->addCase(CGF.Builder.getInt32(CaseNumber), CaseBB);
CGF.EmitStmt(SubStmt);
CGF.EmitBranch(ExitBB);
++CaseNumber;
}
} else {
llvm::BasicBlock *CaseBB = CGF.createBasicBlock(".omp.sections.case");
CGF.EmitBlock(CaseBB);
SwitchStmt->addCase(CGF.Builder.getInt32(0), CaseBB);
CGF.EmitStmt(CapturedStmt);
CGF.EmitBranch(ExitBB);
}
CGF.EmitBlock(ExitBB, /*IsFinished=*/true);
};
CodeGenFunction::OMPPrivateScope LoopScope(CGF);
if (CGF.EmitOMPFirstprivateClause(S, LoopScope)) {
// Emit implicit barrier to synchronize threads and avoid data races on
// initialization of firstprivate variables and post-update of lastprivate
// variables.
CGF.CGM.getOpenMPRuntime().emitBarrierCall(
CGF, S.getBeginLoc(), OMPD_unknown, /*EmitChecks=*/false,
/*ForceSimpleCall=*/true);
}
CGF.EmitOMPPrivateClause(S, LoopScope);
CGOpenMPRuntime::LastprivateConditionalRAII LPCRegion(CGF, S, IV);
HasLastprivates = CGF.EmitOMPLastprivateClauseInit(S, LoopScope);
CGF.EmitOMPReductionClauseInit(S, LoopScope);
(void)LoopScope.Privatize();
if (isOpenMPTargetExecutionDirective(S.getDirectiveKind()))
CGF.CGM.getOpenMPRuntime().adjustTargetSpecificDataForLambdas(CGF, S);
// Emit static non-chunked loop.
OpenMPScheduleTy ScheduleKind;
ScheduleKind.Schedule = OMPC_SCHEDULE_static;
CGOpenMPRuntime::StaticRTInput StaticInit(
/*IVSize=*/32, /*IVSigned=*/true, /*Ordered=*/false, IL.getAddress(CGF),
LB.getAddress(CGF), UB.getAddress(CGF), ST.getAddress(CGF));
CGF.CGM.getOpenMPRuntime().emitForStaticInit(
CGF, S.getBeginLoc(), S.getDirectiveKind(), ScheduleKind, StaticInit);
// UB = min(UB, GlobalUB);
llvm::Value *UBVal = CGF.EmitLoadOfScalar(UB, S.getBeginLoc());
llvm::Value *MinUBGlobalUB = CGF.Builder.CreateSelect(
CGF.Builder.CreateICmpSLT(UBVal, GlobalUBVal), UBVal, GlobalUBVal);
CGF.EmitStoreOfScalar(MinUBGlobalUB, UB);
// IV = LB;
CGF.EmitStoreOfScalar(CGF.EmitLoadOfScalar(LB, S.getBeginLoc()), IV);
// while (idx <= UB) { BODY; ++idx; }
CGF.EmitOMPInnerLoop(S, /*RequiresCleanup=*/false, Cond, Inc, BodyGen,
[](CodeGenFunction &) {});
// Tell the runtime we are done.
auto &&CodeGen = [&S](CodeGenFunction &CGF) {
CGF.CGM.getOpenMPRuntime().emitForStaticFinish(CGF, S.getEndLoc(),
S.getDirectiveKind());
};
CGF.OMPCancelStack.emitExit(CGF, S.getDirectiveKind(), CodeGen);
CGF.EmitOMPReductionClauseFinal(S, /*ReductionKind=*/OMPD_parallel);
// Emit post-update of the reduction variables if IsLastIter != 0.
emitPostUpdateForReductionClause(CGF, S, [IL, &S](CodeGenFunction &CGF) {
return CGF.Builder.CreateIsNotNull(
CGF.EmitLoadOfScalar(IL, S.getBeginLoc()));
});
// Emit final copy of the lastprivate variables if IsLastIter != 0.
if (HasLastprivates)
CGF.EmitOMPLastprivateClauseFinal(
S, /*NoFinals=*/false,
CGF.Builder.CreateIsNotNull(
CGF.EmitLoadOfScalar(IL, S.getBeginLoc())));
};
bool HasCancel = false;
if (auto *OSD = dyn_cast<OMPSectionsDirective>(&S))
HasCancel = OSD->hasCancel();
else if (auto *OPSD = dyn_cast<OMPParallelSectionsDirective>(&S))
HasCancel = OPSD->hasCancel();
OMPCancelStackRAII CancelRegion(*this, S.getDirectiveKind(), HasCancel);
CGM.getOpenMPRuntime().emitInlinedDirective(*this, OMPD_sections, CodeGen,
HasCancel);
// Emit barrier for lastprivates only if 'sections' directive has 'nowait'
// clause. Otherwise the barrier will be generated by the codegen for the
// directive.
if (HasLastprivates && S.getSingleClause<OMPNowaitClause>()) {
// Emit implicit barrier to synchronize threads and avoid data races on
// initialization of firstprivate variables.
CGM.getOpenMPRuntime().emitBarrierCall(*this, S.getBeginLoc(),
OMPD_unknown);
}
}
void CodeGenFunction::EmitOMPSectionsDirective(const OMPSectionsDirective &S) {
if (CGM.getLangOpts().OpenMPIRBuilder) {
llvm::OpenMPIRBuilder &OMPBuilder = CGM.getOpenMPRuntime().getOMPBuilder();
using InsertPointTy = llvm::OpenMPIRBuilder::InsertPointTy;
using BodyGenCallbackTy = llvm::OpenMPIRBuilder::StorableBodyGenCallbackTy;
auto FiniCB = [this](InsertPointTy IP) {
OMPBuilderCBHelpers::FinalizeOMPRegion(*this, IP);
};
const CapturedStmt *ICS = S.getInnermostCapturedStmt();
const Stmt *CapturedStmt = S.getInnermostCapturedStmt()->getCapturedStmt();
const auto *CS = dyn_cast<CompoundStmt>(CapturedStmt);
llvm::SmallVector<BodyGenCallbackTy, 4> SectionCBVector;
if (CS) {
for (const Stmt *SubStmt : CS->children()) {
auto SectionCB = [this, SubStmt](InsertPointTy AllocaIP,
InsertPointTy CodeGenIP,
llvm::BasicBlock &FiniBB) {
OMPBuilderCBHelpers::InlinedRegionBodyRAII IRB(*this, AllocaIP,
FiniBB);
OMPBuilderCBHelpers::EmitOMPRegionBody(*this, SubStmt, CodeGenIP,
FiniBB);
};
SectionCBVector.push_back(SectionCB);
}
} else {
auto SectionCB = [this, CapturedStmt](InsertPointTy AllocaIP,
InsertPointTy CodeGenIP,
llvm::BasicBlock &FiniBB) {
OMPBuilderCBHelpers::InlinedRegionBodyRAII IRB(*this, AllocaIP, FiniBB);
OMPBuilderCBHelpers::EmitOMPRegionBody(*this, CapturedStmt, CodeGenIP,
FiniBB);
};
SectionCBVector.push_back(SectionCB);
}
// Privatization callback that performs appropriate action for
// shared/private/firstprivate/lastprivate/copyin/... variables.
//
// TODO: This defaults to shared right now.
auto PrivCB = [](InsertPointTy AllocaIP, InsertPointTy CodeGenIP,
llvm::Value &, llvm::Value &Val, llvm::Value *&ReplVal) {
// The next line is appropriate only for variables (Val) with the
// data-sharing attribute "shared".
ReplVal = &Val;
return CodeGenIP;
};
CGCapturedStmtInfo CGSI(*ICS, CR_OpenMP);
CodeGenFunction::CGCapturedStmtRAII CapInfoRAII(*this, &CGSI);
llvm::OpenMPIRBuilder::InsertPointTy AllocaIP(
AllocaInsertPt->getParent(), AllocaInsertPt->getIterator());
Builder.restoreIP(OMPBuilder.createSections(
Builder, AllocaIP, SectionCBVector, PrivCB, FiniCB, S.hasCancel(),
S.getSingleClause<OMPNowaitClause>()));
return;
}
{
auto LPCRegion =
CGOpenMPRuntime::LastprivateConditionalRAII::disable(*this, S);
OMPLexicalScope Scope(*this, S, OMPD_unknown);
EmitSections(S);
}
// Emit an implicit barrier at the end.
if (!S.getSingleClause<OMPNowaitClause>()) {
CGM.getOpenMPRuntime().emitBarrierCall(*this, S.getBeginLoc(),
OMPD_sections);
}
// Check for outer lastprivate conditional update.
checkForLastprivateConditionalUpdate(*this, S);
}
void CodeGenFunction::EmitOMPSectionDirective(const OMPSectionDirective &S) {
if (CGM.getLangOpts().OpenMPIRBuilder) {
llvm::OpenMPIRBuilder &OMPBuilder = CGM.getOpenMPRuntime().getOMPBuilder();
using InsertPointTy = llvm::OpenMPIRBuilder::InsertPointTy;
const Stmt *SectionRegionBodyStmt = S.getAssociatedStmt();
auto FiniCB = [this](InsertPointTy IP) {
OMPBuilderCBHelpers::FinalizeOMPRegion(*this, IP);
};
auto BodyGenCB = [SectionRegionBodyStmt, this](InsertPointTy AllocaIP,
InsertPointTy CodeGenIP,
llvm::BasicBlock &FiniBB) {
OMPBuilderCBHelpers::InlinedRegionBodyRAII IRB(*this, AllocaIP, FiniBB);
OMPBuilderCBHelpers::EmitOMPRegionBody(*this, SectionRegionBodyStmt,
CodeGenIP, FiniBB);
};
LexicalScope Scope(*this, S.getSourceRange());
EmitStopPoint(&S);
Builder.restoreIP(OMPBuilder.createSection(Builder, BodyGenCB, FiniCB));
return;
}
LexicalScope Scope(*this, S.getSourceRange());
EmitStopPoint(&S);
EmitStmt(S.getAssociatedStmt());
}
void CodeGenFunction::EmitOMPSingleDirective(const OMPSingleDirective &S) {
llvm::SmallVector<const Expr *, 8> CopyprivateVars;
llvm::SmallVector<const Expr *, 8> DestExprs;
llvm::SmallVector<const Expr *, 8> SrcExprs;
llvm::SmallVector<const Expr *, 8> AssignmentOps;
// Check if there are any 'copyprivate' clauses associated with this
// 'single' construct.
// Build a list of copyprivate variables along with helper expressions
// (<source>, <destination>, <destination>=<source> expressions)
for (const auto *C : S.getClausesOfKind<OMPCopyprivateClause>()) {
CopyprivateVars.append(C->varlists().begin(), C->varlists().end());
DestExprs.append(C->destination_exprs().begin(),
C->destination_exprs().end());
SrcExprs.append(C->source_exprs().begin(), C->source_exprs().end());
AssignmentOps.append(C->assignment_ops().begin(),
C->assignment_ops().end());
}
// Emit code for 'single' region along with 'copyprivate' clauses
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
Action.Enter(CGF);
OMPPrivateScope SingleScope(CGF);
(void)CGF.EmitOMPFirstprivateClause(S, SingleScope);
CGF.EmitOMPPrivateClause(S, SingleScope);
(void)SingleScope.Privatize();
CGF.EmitStmt(S.getInnermostCapturedStmt()->getCapturedStmt());
};
{
auto LPCRegion =
CGOpenMPRuntime::LastprivateConditionalRAII::disable(*this, S);
OMPLexicalScope Scope(*this, S, OMPD_unknown);
CGM.getOpenMPRuntime().emitSingleRegion(*this, CodeGen, S.getBeginLoc(),
CopyprivateVars, DestExprs,
SrcExprs, AssignmentOps);
}
// Emit an implicit barrier at the end (to avoid data race on firstprivate
// init or if no 'nowait' clause was specified and no 'copyprivate' clause).
if (!S.getSingleClause<OMPNowaitClause>() && CopyprivateVars.empty()) {
CGM.getOpenMPRuntime().emitBarrierCall(
*this, S.getBeginLoc(),
S.getSingleClause<OMPNowaitClause>() ? OMPD_unknown : OMPD_single);
}
// Check for outer lastprivate conditional update.
checkForLastprivateConditionalUpdate(*this, S);
}
static void emitMaster(CodeGenFunction &CGF, const OMPExecutableDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
Action.Enter(CGF);
CGF.EmitStmt(S.getRawStmt());
};
CGF.CGM.getOpenMPRuntime().emitMasterRegion(CGF, CodeGen, S.getBeginLoc());
}
void CodeGenFunction::EmitOMPMasterDirective(const OMPMasterDirective &S) {
if (CGM.getLangOpts().OpenMPIRBuilder) {
llvm::OpenMPIRBuilder &OMPBuilder = CGM.getOpenMPRuntime().getOMPBuilder();
using InsertPointTy = llvm::OpenMPIRBuilder::InsertPointTy;
const Stmt *MasterRegionBodyStmt = S.getAssociatedStmt();
auto FiniCB = [this](InsertPointTy IP) {
OMPBuilderCBHelpers::FinalizeOMPRegion(*this, IP);
};
auto BodyGenCB = [MasterRegionBodyStmt, this](InsertPointTy AllocaIP,
InsertPointTy CodeGenIP,
llvm::BasicBlock &FiniBB) {
OMPBuilderCBHelpers::InlinedRegionBodyRAII IRB(*this, AllocaIP, FiniBB);
OMPBuilderCBHelpers::EmitOMPRegionBody(*this, MasterRegionBodyStmt,
CodeGenIP, FiniBB);
};
LexicalScope Scope(*this, S.getSourceRange());
EmitStopPoint(&S);
Builder.restoreIP(OMPBuilder.createMaster(Builder, BodyGenCB, FiniCB));
return;
}
LexicalScope Scope(*this, S.getSourceRange());
EmitStopPoint(&S);
emitMaster(*this, S);
}
static void emitMasked(CodeGenFunction &CGF, const OMPExecutableDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
Action.Enter(CGF);
CGF.EmitStmt(S.getRawStmt());
};
Expr *Filter = nullptr;
if (const auto *FilterClause = S.getSingleClause<OMPFilterClause>())
Filter = FilterClause->getThreadID();
CGF.CGM.getOpenMPRuntime().emitMaskedRegion(CGF, CodeGen, S.getBeginLoc(),
Filter);
}
void CodeGenFunction::EmitOMPMaskedDirective(const OMPMaskedDirective &S) {
if (CGM.getLangOpts().OpenMPIRBuilder) {
llvm::OpenMPIRBuilder &OMPBuilder = CGM.getOpenMPRuntime().getOMPBuilder();
using InsertPointTy = llvm::OpenMPIRBuilder::InsertPointTy;
const Stmt *MaskedRegionBodyStmt = S.getAssociatedStmt();
const Expr *Filter = nullptr;
if (const auto *FilterClause = S.getSingleClause<OMPFilterClause>())
Filter = FilterClause->getThreadID();
llvm::Value *FilterVal = Filter
? EmitScalarExpr(Filter, CGM.Int32Ty)
: llvm::ConstantInt::get(CGM.Int32Ty, /*V=*/0);
auto FiniCB = [this](InsertPointTy IP) {
OMPBuilderCBHelpers::FinalizeOMPRegion(*this, IP);
};
auto BodyGenCB = [MaskedRegionBodyStmt, this](InsertPointTy AllocaIP,
InsertPointTy CodeGenIP,
llvm::BasicBlock &FiniBB) {
OMPBuilderCBHelpers::InlinedRegionBodyRAII IRB(*this, AllocaIP, FiniBB);
OMPBuilderCBHelpers::EmitOMPRegionBody(*this, MaskedRegionBodyStmt,
CodeGenIP, FiniBB);
};
LexicalScope Scope(*this, S.getSourceRange());
EmitStopPoint(&S);
Builder.restoreIP(
OMPBuilder.createMasked(Builder, BodyGenCB, FiniCB, FilterVal));
return;
}
LexicalScope Scope(*this, S.getSourceRange());
EmitStopPoint(&S);
emitMasked(*this, S);
}
void CodeGenFunction::EmitOMPCriticalDirective(const OMPCriticalDirective &S) {
if (CGM.getLangOpts().OpenMPIRBuilder) {
llvm::OpenMPIRBuilder &OMPBuilder = CGM.getOpenMPRuntime().getOMPBuilder();
using InsertPointTy = llvm::OpenMPIRBuilder::InsertPointTy;
const Stmt *CriticalRegionBodyStmt = S.getAssociatedStmt();
const Expr *Hint = nullptr;
if (const auto *HintClause = S.getSingleClause<OMPHintClause>())
Hint = HintClause->getHint();
// TODO: This is slightly different from what's currently being done in
// clang. Fix the Int32Ty to IntPtrTy (pointer width size) when everything
// about typing is final.
llvm::Value *HintInst = nullptr;
if (Hint)
HintInst =
Builder.CreateIntCast(EmitScalarExpr(Hint), CGM.Int32Ty, false);
auto FiniCB = [this](InsertPointTy IP) {
OMPBuilderCBHelpers::FinalizeOMPRegion(*this, IP);
};
auto BodyGenCB = [CriticalRegionBodyStmt, this](InsertPointTy AllocaIP,
InsertPointTy CodeGenIP,
llvm::BasicBlock &FiniBB) {
OMPBuilderCBHelpers::InlinedRegionBodyRAII IRB(*this, AllocaIP, FiniBB);
OMPBuilderCBHelpers::EmitOMPRegionBody(*this, CriticalRegionBodyStmt,
CodeGenIP, FiniBB);
};
LexicalScope Scope(*this, S.getSourceRange());
EmitStopPoint(&S);
Builder.restoreIP(OMPBuilder.createCritical(
Builder, BodyGenCB, FiniCB, S.getDirectiveName().getAsString(),
HintInst));
return;
}
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
Action.Enter(CGF);
CGF.EmitStmt(S.getAssociatedStmt());
};
const Expr *Hint = nullptr;
if (const auto *HintClause = S.getSingleClause<OMPHintClause>())
Hint = HintClause->getHint();
LexicalScope Scope(*this, S.getSourceRange());
EmitStopPoint(&S);
CGM.getOpenMPRuntime().emitCriticalRegion(*this,
S.getDirectiveName().getAsString(),
CodeGen, S.getBeginLoc(), Hint);
}
void CodeGenFunction::EmitOMPParallelForDirective(
const OMPParallelForDirective &S) {
// Emit directive as a combined directive that consists of two implicit
// directives: 'parallel' with 'for' directive.
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
Action.Enter(CGF);
(void)emitWorksharingDirective(CGF, S, S.hasCancel());
};
{
if (llvm::any_of(S.getClausesOfKind<OMPReductionClause>(),
[](const OMPReductionClause *C) {
return C->getModifier() == OMPC_REDUCTION_inscan;
})) {
const auto &&NumIteratorsGen = [&S](CodeGenFunction &CGF) {
CodeGenFunction::OMPLocalDeclMapRAII Scope(CGF);
CGCapturedStmtInfo CGSI(CR_OpenMP);
CodeGenFunction::CGCapturedStmtRAII CapInfoRAII(CGF, &CGSI);
OMPLoopScope LoopScope(CGF, S);
return CGF.EmitScalarExpr(S.getNumIterations());
};
emitScanBasedDirectiveDecls(*this, S, NumIteratorsGen);
}
auto LPCRegion =
CGOpenMPRuntime::LastprivateConditionalRAII::disable(*this, S);
emitCommonOMPParallelDirective(*this, S, OMPD_for, CodeGen,
emitEmptyBoundParameters);
}
// Check for outer lastprivate conditional update.
checkForLastprivateConditionalUpdate(*this, S);
}
void CodeGenFunction::EmitOMPParallelForSimdDirective(
const OMPParallelForSimdDirective &S) {
// Emit directive as a combined directive that consists of two implicit
// directives: 'parallel' with 'for' directive.
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
Action.Enter(CGF);
(void)emitWorksharingDirective(CGF, S, /*HasCancel=*/false);
};
{
if (llvm::any_of(S.getClausesOfKind<OMPReductionClause>(),
[](const OMPReductionClause *C) {
return C->getModifier() == OMPC_REDUCTION_inscan;
})) {
const auto &&NumIteratorsGen = [&S](CodeGenFunction &CGF) {
CodeGenFunction::OMPLocalDeclMapRAII Scope(CGF);
CGCapturedStmtInfo CGSI(CR_OpenMP);
CodeGenFunction::CGCapturedStmtRAII CapInfoRAII(CGF, &CGSI);
OMPLoopScope LoopScope(CGF, S);
return CGF.EmitScalarExpr(S.getNumIterations());
};
emitScanBasedDirectiveDecls(*this, S, NumIteratorsGen);
}
auto LPCRegion =
CGOpenMPRuntime::LastprivateConditionalRAII::disable(*this, S);
emitCommonOMPParallelDirective(*this, S, OMPD_for_simd, CodeGen,
emitEmptyBoundParameters);
}
// Check for outer lastprivate conditional update.
checkForLastprivateConditionalUpdate(*this, S);
}
void CodeGenFunction::EmitOMPParallelMasterDirective(
const OMPParallelMasterDirective &S) {
// Emit directive as a combined directive that consists of two implicit
// directives: 'parallel' with 'master' directive.
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
Action.Enter(CGF);
OMPPrivateScope PrivateScope(CGF);
bool Copyins = CGF.EmitOMPCopyinClause(S);
(void)CGF.EmitOMPFirstprivateClause(S, PrivateScope);
if (Copyins) {
// Emit implicit barrier to synchronize threads and avoid data races on
// propagation master's thread values of threadprivate variables to local
// instances of that variables of all other implicit threads.
CGF.CGM.getOpenMPRuntime().emitBarrierCall(
CGF, S.getBeginLoc(), OMPD_unknown, /*EmitChecks=*/false,
/*ForceSimpleCall=*/true);
}
CGF.EmitOMPPrivateClause(S, PrivateScope);
CGF.EmitOMPReductionClauseInit(S, PrivateScope);
(void)PrivateScope.Privatize();
emitMaster(CGF, S);
CGF.EmitOMPReductionClauseFinal(S, /*ReductionKind=*/OMPD_parallel);
};
{
auto LPCRegion =
CGOpenMPRuntime::LastprivateConditionalRAII::disable(*this, S);
emitCommonOMPParallelDirective(*this, S, OMPD_master, CodeGen,
emitEmptyBoundParameters);
emitPostUpdateForReductionClause(*this, S,
[](CodeGenFunction &) { return nullptr; });
}
// Check for outer lastprivate conditional update.
checkForLastprivateConditionalUpdate(*this, S);
}
void CodeGenFunction::EmitOMPParallelSectionsDirective(
const OMPParallelSectionsDirective &S) {
// Emit directive as a combined directive that consists of two implicit
// directives: 'parallel' with 'sections' directive.
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
Action.Enter(CGF);
CGF.EmitSections(S);
};
{
auto LPCRegion =
CGOpenMPRuntime::LastprivateConditionalRAII::disable(*this, S);
emitCommonOMPParallelDirective(*this, S, OMPD_sections, CodeGen,
emitEmptyBoundParameters);
}
// Check for outer lastprivate conditional update.
checkForLastprivateConditionalUpdate(*this, S);
}
namespace {
/// Get the list of variables declared in the context of the untied tasks.
class CheckVarsEscapingUntiedTaskDeclContext final
: public ConstStmtVisitor<CheckVarsEscapingUntiedTaskDeclContext> {
llvm::SmallVector<const VarDecl *, 4> PrivateDecls;
public:
explicit CheckVarsEscapingUntiedTaskDeclContext() = default;
virtual ~CheckVarsEscapingUntiedTaskDeclContext() = default;
void VisitDeclStmt(const DeclStmt *S) {
if (!S)
return;
// Need to privatize only local vars, static locals can be processed as is.
for (const Decl *D : S->decls()) {
if (const auto *VD = dyn_cast_or_null<VarDecl>(D))
if (VD->hasLocalStorage())
PrivateDecls.push_back(VD);
}
}
void VisitOMPExecutableDirective(const OMPExecutableDirective *) { return; }
void VisitCapturedStmt(const CapturedStmt *) { return; }
void VisitLambdaExpr(const LambdaExpr *) { return; }
void VisitBlockExpr(const BlockExpr *) { return; }
void VisitStmt(const Stmt *S) {
if (!S)
return;
for (const Stmt *Child : S->children())
if (Child)
Visit(Child);
}
/// Swaps list of vars with the provided one.
ArrayRef<const VarDecl *> getPrivateDecls() const { return PrivateDecls; }
};
} // anonymous namespace
void CodeGenFunction::EmitOMPTaskBasedDirective(
const OMPExecutableDirective &S, const OpenMPDirectiveKind CapturedRegion,
const RegionCodeGenTy &BodyGen, const TaskGenTy &TaskGen,
OMPTaskDataTy &Data) {
// Emit outlined function for task construct.
const CapturedStmt *CS = S.getCapturedStmt(CapturedRegion);
auto I = CS->getCapturedDecl()->param_begin();
auto PartId = std::next(I);
auto TaskT = std::next(I, 4);
// Check if the task is final
if (const auto *Clause = S.getSingleClause<OMPFinalClause>()) {
// If the condition constant folds and can be elided, try to avoid emitting
// the condition and the dead arm of the if/else.
const Expr *Cond = Clause->getCondition();
bool CondConstant;
if (ConstantFoldsToSimpleInteger(Cond, CondConstant))
Data.Final.setInt(CondConstant);
else
Data.Final.setPointer(EvaluateExprAsBool(Cond));
} else {
// By default the task is not final.
Data.Final.setInt(/*IntVal=*/false);
}
// Check if the task has 'priority' clause.
if (const auto *Clause = S.getSingleClause<OMPPriorityClause>()) {
const Expr *Prio = Clause->getPriority();
Data.Priority.setInt(/*IntVal=*/true);
Data.Priority.setPointer(EmitScalarConversion(
EmitScalarExpr(Prio), Prio->getType(),
getContext().getIntTypeForBitwidth(/*DestWidth=*/32, /*Signed=*/1),
Prio->getExprLoc()));
}
// The first function argument for tasks is a thread id, the second one is a
// part id (0 for tied tasks, >=0 for untied task).
llvm::DenseSet<const VarDecl *> EmittedAsPrivate;
// Get list of private variables.
for (const auto *C : S.getClausesOfKind<OMPPrivateClause>()) {
auto IRef = C->varlist_begin();
for (const Expr *IInit : C->private_copies()) {
const auto *OrigVD = cast<VarDecl>(cast<DeclRefExpr>(*IRef)->getDecl());
if (EmittedAsPrivate.insert(OrigVD->getCanonicalDecl()).second) {
Data.PrivateVars.push_back(*IRef);
Data.PrivateCopies.push_back(IInit);
}
++IRef;
}
}
EmittedAsPrivate.clear();
// Get list of firstprivate variables.
for (const auto *C : S.getClausesOfKind<OMPFirstprivateClause>()) {
auto IRef = C->varlist_begin();
auto IElemInitRef = C->inits().begin();
for (const Expr *IInit : C->private_copies()) {
const auto *OrigVD = cast<VarDecl>(cast<DeclRefExpr>(*IRef)->getDecl());
if (EmittedAsPrivate.insert(OrigVD->getCanonicalDecl()).second) {
Data.FirstprivateVars.push_back(*IRef);
Data.FirstprivateCopies.push_back(IInit);
Data.FirstprivateInits.push_back(*IElemInitRef);
}
++IRef;
++IElemInitRef;
}
}
// Get list of lastprivate variables (for taskloops).
llvm::MapVector<const VarDecl *, const DeclRefExpr *> LastprivateDstsOrigs;
for (const auto *C : S.getClausesOfKind<OMPLastprivateClause>()) {
auto IRef = C->varlist_begin();
auto ID = C->destination_exprs().begin();
for (const Expr *IInit : C->private_copies()) {
const auto *OrigVD = cast<VarDecl>(cast<DeclRefExpr>(*IRef)->getDecl());
if (EmittedAsPrivate.insert(OrigVD->getCanonicalDecl()).second) {
Data.LastprivateVars.push_back(*IRef);
Data.LastprivateCopies.push_back(IInit);
}
LastprivateDstsOrigs.insert(
std::make_pair(cast<VarDecl>(cast<DeclRefExpr>(*ID)->getDecl()),
cast<DeclRefExpr>(*IRef)));
++IRef;
++ID;
}
}
SmallVector<const Expr *, 4> LHSs;
SmallVector<const Expr *, 4> RHSs;
for (const auto *C : S.getClausesOfKind<OMPReductionClause>()) {
Data.ReductionVars.append(C->varlist_begin(), C->varlist_end());
Data.ReductionOrigs.append(C->varlist_begin(), C->varlist_end());
Data.ReductionCopies.append(C->privates().begin(), C->privates().end());
Data.ReductionOps.append(C->reduction_ops().begin(),
C->reduction_ops().end());
LHSs.append(C->lhs_exprs().begin(), C->lhs_exprs().end());
RHSs.append(C->rhs_exprs().begin(), C->rhs_exprs().end());
}
Data.Reductions = CGM.getOpenMPRuntime().emitTaskReductionInit(
*this, S.getBeginLoc(), LHSs, RHSs, Data);
// Build list of dependences.
for (const auto *C : S.getClausesOfKind<OMPDependClause>()) {
OMPTaskDataTy::DependData &DD =
Data.Dependences.emplace_back(C->getDependencyKind(), C->getModifier());
DD.DepExprs.append(C->varlist_begin(), C->varlist_end());
}
// Get list of local vars for untied tasks.
if (!Data.Tied) {
CheckVarsEscapingUntiedTaskDeclContext Checker;
Checker.Visit(S.getInnermostCapturedStmt()->getCapturedStmt());
Data.PrivateLocals.append(Checker.getPrivateDecls().begin(),
Checker.getPrivateDecls().end());
}
auto &&CodeGen = [&Data, &S, CS, &BodyGen, &LastprivateDstsOrigs,
CapturedRegion](CodeGenFunction &CGF,
PrePostActionTy &Action) {
llvm::MapVector<CanonicalDeclPtr<const VarDecl>,
std::pair<Address, Address>>
UntiedLocalVars;
// Set proper addresses for generated private copies.
OMPPrivateScope Scope(CGF);
llvm::SmallVector<std::pair<const VarDecl *, Address>, 16> FirstprivatePtrs;
if (!Data.PrivateVars.empty() || !Data.FirstprivateVars.empty() ||
!Data.LastprivateVars.empty() || !Data.PrivateLocals.empty()) {
enum { PrivatesParam = 2, CopyFnParam = 3 };
llvm::Value *CopyFn = CGF.Builder.CreateLoad(
CGF.GetAddrOfLocalVar(CS->getCapturedDecl()->getParam(CopyFnParam)));
llvm::Value *PrivatesPtr = CGF.Builder.CreateLoad(CGF.GetAddrOfLocalVar(
CS->getCapturedDecl()->getParam(PrivatesParam)));
// Map privates.
llvm::SmallVector<std::pair<const VarDecl *, Address>, 16> PrivatePtrs;
llvm::SmallVector<llvm::Value *, 16> CallArgs;
llvm::SmallVector<llvm::Type *, 4> ParamTypes;
CallArgs.push_back(PrivatesPtr);
ParamTypes.push_back(PrivatesPtr->getType());
for (const Expr *E : Data.PrivateVars) {
const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl());
Address PrivatePtr = CGF.CreateMemTemp(
CGF.getContext().getPointerType(E->getType()), ".priv.ptr.addr");
PrivatePtrs.emplace_back(VD, PrivatePtr);
CallArgs.push_back(PrivatePtr.getPointer());
ParamTypes.push_back(PrivatePtr.getType());
}
for (const Expr *E : Data.FirstprivateVars) {
const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl());
Address PrivatePtr =
CGF.CreateMemTemp(CGF.getContext().getPointerType(E->getType()),
".firstpriv.ptr.addr");
PrivatePtrs.emplace_back(VD, PrivatePtr);
FirstprivatePtrs.emplace_back(VD, PrivatePtr);
CallArgs.push_back(PrivatePtr.getPointer());
ParamTypes.push_back(PrivatePtr.getType());
}
for (const Expr *E : Data.LastprivateVars) {
const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl());
Address PrivatePtr =
CGF.CreateMemTemp(CGF.getContext().getPointerType(E->getType()),
".lastpriv.ptr.addr");
PrivatePtrs.emplace_back(VD, PrivatePtr);
CallArgs.push_back(PrivatePtr.getPointer());
ParamTypes.push_back(PrivatePtr.getType());
}
for (const VarDecl *VD : Data.PrivateLocals) {
QualType Ty = VD->getType().getNonReferenceType();
if (VD->getType()->isLValueReferenceType())
Ty = CGF.getContext().getPointerType(Ty);
if (isAllocatableDecl(VD))
Ty = CGF.getContext().getPointerType(Ty);
Address PrivatePtr = CGF.CreateMemTemp(
CGF.getContext().getPointerType(Ty), ".local.ptr.addr");
auto Result = UntiedLocalVars.insert(
std::make_pair(VD, std::make_pair(PrivatePtr, Address::invalid())));
// If key exists update in place.
if (Result.second == false)
*Result.first = std::make_pair(
VD, std::make_pair(PrivatePtr, Address::invalid()));
CallArgs.push_back(PrivatePtr.getPointer());
ParamTypes.push_back(PrivatePtr.getType());
}
auto *CopyFnTy = llvm::FunctionType::get(CGF.Builder.getVoidTy(),
ParamTypes, /*isVarArg=*/false);
CopyFn = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
CopyFn, CopyFnTy->getPointerTo());
CGF.CGM.getOpenMPRuntime().emitOutlinedFunctionCall(
CGF, S.getBeginLoc(), {CopyFnTy, CopyFn}, CallArgs);
for (const auto &Pair : LastprivateDstsOrigs) {
const auto *OrigVD = cast<VarDecl>(Pair.second->getDecl());
DeclRefExpr DRE(CGF.getContext(), const_cast<VarDecl *>(OrigVD),
/*RefersToEnclosingVariableOrCapture=*/
CGF.CapturedStmtInfo->lookup(OrigVD) != nullptr,
Pair.second->getType(), VK_LValue,
Pair.second->getExprLoc());
Scope.addPrivate(Pair.first, [&CGF, &DRE]() {
return CGF.EmitLValue(&DRE).getAddress(CGF);
});
}
for (const auto &Pair : PrivatePtrs) {
Address Replacement(CGF.Builder.CreateLoad(Pair.second),
CGF.getContext().getDeclAlign(Pair.first));
Scope.addPrivate(Pair.first, [Replacement]() { return Replacement; });
}
// Adjust mapping for internal locals by mapping actual memory instead of
// a pointer to this memory.
for (auto &Pair : UntiedLocalVars) {
if (isAllocatableDecl(Pair.first)) {
llvm::Value *Ptr = CGF.Builder.CreateLoad(Pair.second.first);
Address Replacement(Ptr, CGF.getPointerAlign());
Pair.second.first = Replacement;
Ptr = CGF.Builder.CreateLoad(Replacement);
Replacement = Address(Ptr, CGF.getContext().getDeclAlign(Pair.first));
Pair.second.second = Replacement;
} else {
llvm::Value *Ptr = CGF.Builder.CreateLoad(Pair.second.first);
Address Replacement(Ptr, CGF.getContext().getDeclAlign(Pair.first));
Pair.second.first = Replacement;
}
}
}
if (Data.Reductions) {
OMPPrivateScope FirstprivateScope(CGF);
for (const auto &Pair : FirstprivatePtrs) {
Address Replacement(CGF.Builder.CreateLoad(Pair.second),
CGF.getContext().getDeclAlign(Pair.first));
FirstprivateScope.addPrivate(Pair.first,
[Replacement]() { return Replacement; });
}
(void)FirstprivateScope.Privatize();
OMPLexicalScope LexScope(CGF, S, CapturedRegion);
ReductionCodeGen RedCG(Data.ReductionVars, Data.ReductionVars,
Data.ReductionCopies, Data.ReductionOps);
llvm::Value *ReductionsPtr = CGF.Builder.CreateLoad(
CGF.GetAddrOfLocalVar(CS->getCapturedDecl()->getParam(9)));
for (unsigned Cnt = 0, E = Data.ReductionVars.size(); Cnt < E; ++Cnt) {
RedCG.emitSharedOrigLValue(CGF, Cnt);
RedCG.emitAggregateType(CGF, Cnt);
// FIXME: This must removed once the runtime library is fixed.
// Emit required threadprivate variables for
// initializer/combiner/finalizer.
CGF.CGM.getOpenMPRuntime().emitTaskReductionFixups(CGF, S.getBeginLoc(),
RedCG, Cnt);
Address Replacement = CGF.CGM.getOpenMPRuntime().getTaskReductionItem(
CGF, S.getBeginLoc(), ReductionsPtr, RedCG.getSharedLValue(Cnt));
Replacement =
Address(CGF.EmitScalarConversion(
Replacement.getPointer(), CGF.getContext().VoidPtrTy,
CGF.getContext().getPointerType(
Data.ReductionCopies[Cnt]->getType()),
Data.ReductionCopies[Cnt]->getExprLoc()),
Replacement.getAlignment());
Replacement = RedCG.adjustPrivateAddress(CGF, Cnt, Replacement);
Scope.addPrivate(RedCG.getBaseDecl(Cnt),
[Replacement]() { return Replacement; });
}
}
// Privatize all private variables except for in_reduction items.
(void)Scope.Privatize();
SmallVector<const Expr *, 4> InRedVars;
SmallVector<const Expr *, 4> InRedPrivs;
SmallVector<const Expr *, 4> InRedOps;
SmallVector<const Expr *, 4> TaskgroupDescriptors;
for (const auto *C : S.getClausesOfKind<OMPInReductionClause>()) {
auto IPriv = C->privates().begin();
auto IRed = C->reduction_ops().begin();
auto ITD = C->taskgroup_descriptors().begin();
for (const Expr *Ref : C->varlists()) {
InRedVars.emplace_back(Ref);
InRedPrivs.emplace_back(*IPriv);
InRedOps.emplace_back(*IRed);
TaskgroupDescriptors.emplace_back(*ITD);
std::advance(IPriv, 1);
std::advance(IRed, 1);
std::advance(ITD, 1);
}
}
// Privatize in_reduction items here, because taskgroup descriptors must be
// privatized earlier.
OMPPrivateScope InRedScope(CGF);
if (!InRedVars.empty()) {
ReductionCodeGen RedCG(InRedVars, InRedVars, InRedPrivs, InRedOps);
for (unsigned Cnt = 0, E = InRedVars.size(); Cnt < E; ++Cnt) {
RedCG.emitSharedOrigLValue(CGF, Cnt);
RedCG.emitAggregateType(CGF, Cnt);
// The taskgroup descriptor variable is always implicit firstprivate and
// privatized already during processing of the firstprivates.
// FIXME: This must removed once the runtime library is fixed.
// Emit required threadprivate variables for
// initializer/combiner/finalizer.
CGF.CGM.getOpenMPRuntime().emitTaskReductionFixups(CGF, S.getBeginLoc(),
RedCG, Cnt);
llvm::Value *ReductionsPtr;
if (const Expr *TRExpr = TaskgroupDescriptors[Cnt]) {
ReductionsPtr = CGF.EmitLoadOfScalar(CGF.EmitLValue(TRExpr),
TRExpr->getExprLoc());
} else {
ReductionsPtr = llvm::ConstantPointerNull::get(CGF.VoidPtrTy);
}
Address Replacement = CGF.CGM.getOpenMPRuntime().getTaskReductionItem(
CGF, S.getBeginLoc(), ReductionsPtr, RedCG.getSharedLValue(Cnt));
Replacement = Address(
CGF.EmitScalarConversion(
Replacement.getPointer(), CGF.getContext().VoidPtrTy,
CGF.getContext().getPointerType(InRedPrivs[Cnt]->getType()),
InRedPrivs[Cnt]->getExprLoc()),
Replacement.getAlignment());
Replacement = RedCG.adjustPrivateAddress(CGF, Cnt, Replacement);
InRedScope.addPrivate(RedCG.getBaseDecl(Cnt),
[Replacement]() { return Replacement; });
}
}
(void)InRedScope.Privatize();
CGOpenMPRuntime::UntiedTaskLocalDeclsRAII LocalVarsScope(CGF,
UntiedLocalVars);
Action.Enter(CGF);
BodyGen(CGF);
};
llvm::Function *OutlinedFn = CGM.getOpenMPRuntime().emitTaskOutlinedFunction(
S, *I, *PartId, *TaskT, S.getDirectiveKind(), CodeGen, Data.Tied,
Data.NumberOfParts);
OMPLexicalScope Scope(*this, S, llvm::None,
!isOpenMPParallelDirective(S.getDirectiveKind()) &&
!isOpenMPSimdDirective(S.getDirectiveKind()));
TaskGen(*this, OutlinedFn, Data);
}
static ImplicitParamDecl *
createImplicitFirstprivateForType(ASTContext &C, OMPTaskDataTy &Data,
QualType Ty, CapturedDecl *CD,
SourceLocation Loc) {
auto *OrigVD = ImplicitParamDecl::Create(C, CD, Loc, /*Id=*/nullptr, Ty,
ImplicitParamDecl::Other);
auto *OrigRef = DeclRefExpr::Create(
C, NestedNameSpecifierLoc(), SourceLocation(), OrigVD,
/*RefersToEnclosingVariableOrCapture=*/false, Loc, Ty, VK_LValue);
auto *PrivateVD = ImplicitParamDecl::Create(C, CD, Loc, /*Id=*/nullptr, Ty,
ImplicitParamDecl::Other);
auto *PrivateRef = DeclRefExpr::Create(
C, NestedNameSpecifierLoc(), SourceLocation(), PrivateVD,
/*RefersToEnclosingVariableOrCapture=*/false, Loc, Ty, VK_LValue);
QualType ElemType = C.getBaseElementType(Ty);
auto *InitVD = ImplicitParamDecl::Create(C, CD, Loc, /*Id=*/nullptr, ElemType,
ImplicitParamDecl::Other);
auto *InitRef = DeclRefExpr::Create(
C, NestedNameSpecifierLoc(), SourceLocation(), InitVD,
/*RefersToEnclosingVariableOrCapture=*/false, Loc, ElemType, VK_LValue);
PrivateVD->setInitStyle(VarDecl::CInit);
PrivateVD->setInit(ImplicitCastExpr::Create(C, ElemType, CK_LValueToRValue,
InitRef, /*BasePath=*/nullptr,
VK_PRValue, FPOptionsOverride()));
Data.FirstprivateVars.emplace_back(OrigRef);
Data.FirstprivateCopies.emplace_back(PrivateRef);
Data.FirstprivateInits.emplace_back(InitRef);
return OrigVD;
}
void CodeGenFunction::EmitOMPTargetTaskBasedDirective(
const OMPExecutableDirective &S, const RegionCodeGenTy &BodyGen,
OMPTargetDataInfo &InputInfo) {
// Emit outlined function for task construct.
const CapturedStmt *CS = S.getCapturedStmt(OMPD_task);
Address CapturedStruct = GenerateCapturedStmtArgument(*CS);
QualType SharedsTy = getContext().getRecordType(CS->getCapturedRecordDecl());
auto I = CS->getCapturedDecl()->param_begin();
auto PartId = std::next(I);
auto TaskT = std::next(I, 4);
OMPTaskDataTy Data;
// The task is not final.
Data.Final.setInt(/*IntVal=*/false);
// Get list of firstprivate variables.
for (const auto *C : S.getClausesOfKind<OMPFirstprivateClause>()) {
auto IRef = C->varlist_begin();
auto IElemInitRef = C->inits().begin();
for (auto *IInit : C->private_copies()) {
Data.FirstprivateVars.push_back(*IRef);
Data.FirstprivateCopies.push_back(IInit);
Data.FirstprivateInits.push_back(*IElemInitRef);
++IRef;
++IElemInitRef;
}
}
OMPPrivateScope TargetScope(*this);
VarDecl *BPVD = nullptr;
VarDecl *PVD = nullptr;
VarDecl *SVD = nullptr;
VarDecl *MVD = nullptr;
if (InputInfo.NumberOfTargetItems > 0) {
auto *CD = CapturedDecl::Create(
getContext(), getContext().getTranslationUnitDecl(), /*NumParams=*/0);
llvm::APInt ArrSize(/*numBits=*/32, InputInfo.NumberOfTargetItems);
QualType BaseAndPointerAndMapperType = getContext().getConstantArrayType(
getContext().VoidPtrTy, ArrSize, nullptr, ArrayType::Normal,
/*IndexTypeQuals=*/0);
BPVD = createImplicitFirstprivateForType(
getContext(), Data, BaseAndPointerAndMapperType, CD, S.getBeginLoc());
PVD = createImplicitFirstprivateForType(
getContext(), Data, BaseAndPointerAndMapperType, CD, S.getBeginLoc());
QualType SizesType = getContext().getConstantArrayType(
getContext().getIntTypeForBitwidth(/*DestWidth=*/64, /*Signed=*/1),
ArrSize, nullptr, ArrayType::Normal,
/*IndexTypeQuals=*/0);
SVD = createImplicitFirstprivateForType(getContext(), Data, SizesType, CD,
S.getBeginLoc());
TargetScope.addPrivate(
BPVD, [&InputInfo]() { return InputInfo.BasePointersArray; });
TargetScope.addPrivate(PVD,
[&InputInfo]() { return InputInfo.PointersArray; });
TargetScope.addPrivate(SVD,
[&InputInfo]() { return InputInfo.SizesArray; });
// If there is no user-defined mapper, the mapper array will be nullptr. In
// this case, we don't need to privatize it.
if (!dyn_cast_or_null<llvm::ConstantPointerNull>(
InputInfo.MappersArray.getPointer())) {
MVD = createImplicitFirstprivateForType(
getContext(), Data, BaseAndPointerAndMapperType, CD, S.getBeginLoc());
TargetScope.addPrivate(MVD,
[&InputInfo]() { return InputInfo.MappersArray; });
}
}
(void)TargetScope.Privatize();
// Build list of dependences.
for (const auto *C : S.getClausesOfKind<OMPDependClause>()) {
OMPTaskDataTy::DependData &DD =
Data.Dependences.emplace_back(C->getDependencyKind(), C->getModifier());
DD.DepExprs.append(C->varlist_begin(), C->varlist_end());
}
auto &&CodeGen = [&Data, &S, CS, &BodyGen, BPVD, PVD, SVD, MVD,
&InputInfo](CodeGenFunction &CGF, PrePostActionTy &Action) {
// Set proper addresses for generated private copies.
OMPPrivateScope Scope(CGF);
if (!Data.FirstprivateVars.empty()) {
enum { PrivatesParam = 2, CopyFnParam = 3 };
llvm::Value *CopyFn = CGF.Builder.CreateLoad(
CGF.GetAddrOfLocalVar(CS->getCapturedDecl()->getParam(CopyFnParam)));
llvm::Value *PrivatesPtr = CGF.Builder.CreateLoad(CGF.GetAddrOfLocalVar(
CS->getCapturedDecl()->getParam(PrivatesParam)));
// Map privates.
llvm::SmallVector<std::pair<const VarDecl *, Address>, 16> PrivatePtrs;
llvm::SmallVector<llvm::Value *, 16> CallArgs;
llvm::SmallVector<llvm::Type *, 4> ParamTypes;
CallArgs.push_back(PrivatesPtr);
ParamTypes.push_back(PrivatesPtr->getType());
for (const Expr *E : Data.FirstprivateVars) {
const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl());
Address PrivatePtr =
CGF.CreateMemTemp(CGF.getContext().getPointerType(E->getType()),
".firstpriv.ptr.addr");
PrivatePtrs.emplace_back(VD, PrivatePtr);
CallArgs.push_back(PrivatePtr.getPointer());
ParamTypes.push_back(PrivatePtr.getType());
}
auto *CopyFnTy = llvm::FunctionType::get(CGF.Builder.getVoidTy(),
ParamTypes, /*isVarArg=*/false);
CopyFn = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
CopyFn, CopyFnTy->getPointerTo());
CGF.CGM.getOpenMPRuntime().emitOutlinedFunctionCall(
CGF, S.getBeginLoc(), {CopyFnTy, CopyFn}, CallArgs);
for (const auto &Pair : PrivatePtrs) {
Address Replacement(CGF.Builder.CreateLoad(Pair.second),
CGF.getContext().getDeclAlign(Pair.first));
Scope.addPrivate(Pair.first, [Replacement]() { return Replacement; });
}
}
// Privatize all private variables except for in_reduction items.
(void)Scope.Privatize();
if (InputInfo.NumberOfTargetItems > 0) {
InputInfo.BasePointersArray = CGF.Builder.CreateConstArrayGEP(
CGF.GetAddrOfLocalVar(BPVD), /*Index=*/0);
InputInfo.PointersArray = CGF.Builder.CreateConstArrayGEP(
CGF.GetAddrOfLocalVar(PVD), /*Index=*/0);
InputInfo.SizesArray = CGF.Builder.CreateConstArrayGEP(
CGF.GetAddrOfLocalVar(SVD), /*Index=*/0);
// If MVD is nullptr, the mapper array is not privatized
if (MVD)
InputInfo.MappersArray = CGF.Builder.CreateConstArrayGEP(
CGF.GetAddrOfLocalVar(MVD), /*Index=*/0);
}
Action.Enter(CGF);
OMPLexicalScope LexScope(CGF, S, OMPD_task, /*EmitPreInitStmt=*/false);
BodyGen(CGF);
};
llvm::Function *OutlinedFn = CGM.getOpenMPRuntime().emitTaskOutlinedFunction(
S, *I, *PartId, *TaskT, S.getDirectiveKind(), CodeGen, /*Tied=*/true,
Data.NumberOfParts);
llvm::APInt TrueOrFalse(32, S.hasClausesOfKind<OMPNowaitClause>() ? 1 : 0);
IntegerLiteral IfCond(getContext(), TrueOrFalse,
getContext().getIntTypeForBitwidth(32, /*Signed=*/0),
SourceLocation());
CGM.getOpenMPRuntime().emitTaskCall(*this, S.getBeginLoc(), S, OutlinedFn,
SharedsTy, CapturedStruct, &IfCond, Data);
}
void CodeGenFunction::EmitOMPTaskDirective(const OMPTaskDirective &S) {
// Emit outlined function for task construct.
const CapturedStmt *CS = S.getCapturedStmt(OMPD_task);
Address CapturedStruct = GenerateCapturedStmtArgument(*CS);
QualType SharedsTy = getContext().getRecordType(CS->getCapturedRecordDecl());
const Expr *IfCond = nullptr;
for (const auto *C : S.getClausesOfKind<OMPIfClause>()) {
if (C->getNameModifier() == OMPD_unknown ||
C->getNameModifier() == OMPD_task) {
IfCond = C->getCondition();
break;
}
}
OMPTaskDataTy Data;
// Check if we should emit tied or untied task.
Data.Tied = !S.getSingleClause<OMPUntiedClause>();
auto &&BodyGen = [CS](CodeGenFunction &CGF, PrePostActionTy &) {
CGF.EmitStmt(CS->getCapturedStmt());
};
auto &&TaskGen = [&S, SharedsTy, CapturedStruct,
IfCond](CodeGenFunction &CGF, llvm::Function *OutlinedFn,
const OMPTaskDataTy &Data) {
CGF.CGM.getOpenMPRuntime().emitTaskCall(CGF, S.getBeginLoc(), S, OutlinedFn,
SharedsTy, CapturedStruct, IfCond,
Data);
};
auto LPCRegion =
CGOpenMPRuntime::LastprivateConditionalRAII::disable(*this, S);
EmitOMPTaskBasedDirective(S, OMPD_task, BodyGen, TaskGen, Data);
}
void CodeGenFunction::EmitOMPTaskyieldDirective(
const OMPTaskyieldDirective &S) {
CGM.getOpenMPRuntime().emitTaskyieldCall(*this, S.getBeginLoc());
}
void CodeGenFunction::EmitOMPBarrierDirective(const OMPBarrierDirective &S) {
CGM.getOpenMPRuntime().emitBarrierCall(*this, S.getBeginLoc(), OMPD_barrier);
}
void CodeGenFunction::EmitOMPTaskwaitDirective(const OMPTaskwaitDirective &S) {
CGM.getOpenMPRuntime().emitTaskwaitCall(*this, S.getBeginLoc());
}
void CodeGenFunction::EmitOMPTaskgroupDirective(
const OMPTaskgroupDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
Action.Enter(CGF);
if (const Expr *E = S.getReductionRef()) {
SmallVector<const Expr *, 4> LHSs;
SmallVector<const Expr *, 4> RHSs;
OMPTaskDataTy Data;
for (const auto *C : S.getClausesOfKind<OMPTaskReductionClause>()) {
Data.ReductionVars.append(C->varlist_begin(), C->varlist_end());
Data.ReductionOrigs.append(C->varlist_begin(), C->varlist_end());
Data.ReductionCopies.append(C->privates().begin(), C->privates().end());
Data.ReductionOps.append(C->reduction_ops().begin(),
C->reduction_ops().end());
LHSs.append(C->lhs_exprs().begin(), C->lhs_exprs().end());
RHSs.append(C->rhs_exprs().begin(), C->rhs_exprs().end());
}
llvm::Value *ReductionDesc =
CGF.CGM.getOpenMPRuntime().emitTaskReductionInit(CGF, S.getBeginLoc(),
LHSs, RHSs, Data);
const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl());
CGF.EmitVarDecl(*VD);
CGF.EmitStoreOfScalar(ReductionDesc, CGF.GetAddrOfLocalVar(VD),
/*Volatile=*/false, E->getType());
}
CGF.EmitStmt(S.getInnermostCapturedStmt()->getCapturedStmt());
};
OMPLexicalScope Scope(*this, S, OMPD_unknown);
CGM.getOpenMPRuntime().emitTaskgroupRegion(*this, CodeGen, S.getBeginLoc());
}
void CodeGenFunction::EmitOMPFlushDirective(const OMPFlushDirective &S) {
llvm::AtomicOrdering AO = S.getSingleClause<OMPFlushClause>()
? llvm::AtomicOrdering::NotAtomic
: llvm::AtomicOrdering::AcquireRelease;
CGM.getOpenMPRuntime().emitFlush(
*this,
[&S]() -> ArrayRef<const Expr *> {
if (const auto *FlushClause = S.getSingleClause<OMPFlushClause>())
return llvm::makeArrayRef(FlushClause->varlist_begin(),
FlushClause->varlist_end());
return llvm::None;
}(),
S.getBeginLoc(), AO);
}
void CodeGenFunction::EmitOMPDepobjDirective(const OMPDepobjDirective &S) {
const auto *DO = S.getSingleClause<OMPDepobjClause>();
LValue DOLVal = EmitLValue(DO->getDepobj());
if (const auto *DC = S.getSingleClause<OMPDependClause>()) {
OMPTaskDataTy::DependData Dependencies(DC->getDependencyKind(),
DC->getModifier());
Dependencies.DepExprs.append(DC->varlist_begin(), DC->varlist_end());
Address DepAddr = CGM.getOpenMPRuntime().emitDepobjDependClause(
*this, Dependencies, DC->getBeginLoc());
EmitStoreOfScalar(DepAddr.getPointer(), DOLVal);
return;
}
if (const auto *DC = S.getSingleClause<OMPDestroyClause>()) {
CGM.getOpenMPRuntime().emitDestroyClause(*this, DOLVal, DC->getBeginLoc());
return;
}
if (const auto *UC = S.getSingleClause<OMPUpdateClause>()) {
CGM.getOpenMPRuntime().emitUpdateClause(
*this, DOLVal, UC->getDependencyKind(), UC->getBeginLoc());
return;
}
}
void CodeGenFunction::EmitOMPScanDirective(const OMPScanDirective &S) {
if (!OMPParentLoopDirectiveForScan)
return;
const OMPExecutableDirective &ParentDir = *OMPParentLoopDirectiveForScan;
bool IsInclusive = S.hasClausesOfKind<OMPInclusiveClause>();
SmallVector<const Expr *, 4> Shareds;
SmallVector<const Expr *, 4> Privates;
SmallVector<const Expr *, 4> LHSs;
SmallVector<const Expr *, 4> RHSs;
SmallVector<const Expr *, 4> ReductionOps;
SmallVector<const Expr *, 4> CopyOps;
SmallVector<const Expr *, 4> CopyArrayTemps;
SmallVector<const Expr *, 4> CopyArrayElems;
for (const auto *C : ParentDir.getClausesOfKind<OMPReductionClause>()) {
if (C->getModifier() != OMPC_REDUCTION_inscan)
continue;
Shareds.append(C->varlist_begin(), C->varlist_end());
Privates.append(C->privates().begin(), C->privates().end());
LHSs.append(C->lhs_exprs().begin(), C->lhs_exprs().end());
RHSs.append(C->rhs_exprs().begin(), C->rhs_exprs().end());
ReductionOps.append(C->reduction_ops().begin(), C->reduction_ops().end());
CopyOps.append(C->copy_ops().begin(), C->copy_ops().end());
CopyArrayTemps.append(C->copy_array_temps().begin(),
C->copy_array_temps().end());
CopyArrayElems.append(C->copy_array_elems().begin(),
C->copy_array_elems().end());
}
if (ParentDir.getDirectiveKind() == OMPD_simd ||
(getLangOpts().OpenMPSimd &&
isOpenMPSimdDirective(ParentDir.getDirectiveKind()))) {
// For simd directive and simd-based directives in simd only mode, use the
// following codegen:
// int x = 0;
// #pragma omp simd reduction(inscan, +: x)
// for (..) {
// <first part>
// #pragma omp scan inclusive(x)
// <second part>
// }
// is transformed to:
// int x = 0;
// for (..) {
// int x_priv = 0;
// <first part>
// x = x_priv + x;
// x_priv = x;
// <second part>
// }
// and
// int x = 0;
// #pragma omp simd reduction(inscan, +: x)
// for (..) {
// <first part>
// #pragma omp scan exclusive(x)
// <second part>
// }
// to
// int x = 0;
// for (..) {
// int x_priv = 0;
// <second part>
// int temp = x;
// x = x_priv + x;
// x_priv = temp;
// <first part>
// }
llvm::BasicBlock *OMPScanReduce = createBasicBlock("omp.inscan.reduce");
EmitBranch(IsInclusive
? OMPScanReduce
: BreakContinueStack.back().ContinueBlock.getBlock());
EmitBlock(OMPScanDispatch);
{
// New scope for correct construction/destruction of temp variables for
// exclusive scan.
LexicalScope Scope(*this, S.getSourceRange());
EmitBranch(IsInclusive ? OMPBeforeScanBlock : OMPAfterScanBlock);
EmitBlock(OMPScanReduce);
if (!IsInclusive) {
// Create temp var and copy LHS value to this temp value.
// TMP = LHS;
for (unsigned I = 0, E = CopyArrayElems.size(); I < E; ++I) {
const Expr *PrivateExpr = Privates[I];
const Expr *TempExpr = CopyArrayTemps[I];
EmitAutoVarDecl(
*cast<VarDecl>(cast<DeclRefExpr>(TempExpr)->getDecl()));
LValue DestLVal = EmitLValue(TempExpr);
LValue SrcLVal = EmitLValue(LHSs[I]);
EmitOMPCopy(PrivateExpr->getType(), DestLVal.getAddress(*this),
SrcLVal.getAddress(*this),
cast<VarDecl>(cast<DeclRefExpr>(LHSs[I])->getDecl()),
cast<VarDecl>(cast<DeclRefExpr>(RHSs[I])->getDecl()),
CopyOps[I]);
}
}
CGM.getOpenMPRuntime().emitReduction(
*this, ParentDir.getEndLoc(), Privates, LHSs, RHSs, ReductionOps,
{/*WithNowait=*/true, /*SimpleReduction=*/true, OMPD_simd});
for (unsigned I = 0, E = CopyArrayElems.size(); I < E; ++I) {
const Expr *PrivateExpr = Privates[I];
LValue DestLVal;
LValue SrcLVal;
if (IsInclusive) {
DestLVal = EmitLValue(RHSs[I]);
SrcLVal = EmitLValue(LHSs[I]);
} else {
const Expr *TempExpr = CopyArrayTemps[I];
DestLVal = EmitLValue(RHSs[I]);
SrcLVal = EmitLValue(TempExpr);
}
EmitOMPCopy(PrivateExpr->getType(), DestLVal.getAddress(*this),
SrcLVal.getAddress(*this),
cast<VarDecl>(cast<DeclRefExpr>(LHSs[I])->getDecl()),
cast<VarDecl>(cast<DeclRefExpr>(RHSs[I])->getDecl()),
CopyOps[I]);
}
}
EmitBranch(IsInclusive ? OMPAfterScanBlock : OMPBeforeScanBlock);
OMPScanExitBlock = IsInclusive
? BreakContinueStack.back().ContinueBlock.getBlock()
: OMPScanReduce;
EmitBlock(OMPAfterScanBlock);
return;
}
if (!IsInclusive) {
EmitBranch(BreakContinueStack.back().ContinueBlock.getBlock());
EmitBlock(OMPScanExitBlock);
}
if (OMPFirstScanLoop) {
// Emit buffer[i] = red; at the end of the input phase.
const auto *IVExpr = cast<OMPLoopDirective>(ParentDir)
.getIterationVariable()
->IgnoreParenImpCasts();
LValue IdxLVal = EmitLValue(IVExpr);
llvm::Value *IdxVal = EmitLoadOfScalar(IdxLVal, IVExpr->getExprLoc());
IdxVal = Builder.CreateIntCast(IdxVal, SizeTy, /*isSigned=*/false);
for (unsigned I = 0, E = CopyArrayElems.size(); I < E; ++I) {
const Expr *PrivateExpr = Privates[I];
const Expr *OrigExpr = Shareds[I];
const Expr *CopyArrayElem = CopyArrayElems[I];
OpaqueValueMapping IdxMapping(
*this,
cast<OpaqueValueExpr>(
cast<ArraySubscriptExpr>(CopyArrayElem)->getIdx()),
RValue::get(IdxVal));
LValue DestLVal = EmitLValue(CopyArrayElem);
LValue SrcLVal = EmitLValue(OrigExpr);
EmitOMPCopy(PrivateExpr->getType(), DestLVal.getAddress(*this),
SrcLVal.getAddress(*this),
cast<VarDecl>(cast<DeclRefExpr>(LHSs[I])->getDecl()),
cast<VarDecl>(cast<DeclRefExpr>(RHSs[I])->getDecl()),
CopyOps[I]);
}
}
EmitBranch(BreakContinueStack.back().ContinueBlock.getBlock());
if (IsInclusive) {
EmitBlock(OMPScanExitBlock);
EmitBranch(BreakContinueStack.back().ContinueBlock.getBlock());
}
EmitBlock(OMPScanDispatch);
if (!OMPFirstScanLoop) {
// Emit red = buffer[i]; at the entrance to the scan phase.
const auto *IVExpr = cast<OMPLoopDirective>(ParentDir)
.getIterationVariable()
->IgnoreParenImpCasts();
LValue IdxLVal = EmitLValue(IVExpr);
llvm::Value *IdxVal = EmitLoadOfScalar(IdxLVal, IVExpr->getExprLoc());
IdxVal = Builder.CreateIntCast(IdxVal, SizeTy, /*isSigned=*/false);
llvm::BasicBlock *ExclusiveExitBB = nullptr;
if (!IsInclusive) {
llvm::BasicBlock *ContBB = createBasicBlock("omp.exclusive.dec");
ExclusiveExitBB = createBasicBlock("omp.exclusive.copy.exit");
llvm::Value *Cmp = Builder.CreateIsNull(IdxVal);
Builder.CreateCondBr(Cmp, ExclusiveExitBB, ContBB);
EmitBlock(ContBB);
// Use idx - 1 iteration for exclusive scan.
IdxVal = Builder.CreateNUWSub(IdxVal, llvm::ConstantInt::get(SizeTy, 1));
}
for (unsigned I = 0, E = CopyArrayElems.size(); I < E; ++I) {
const Expr *PrivateExpr = Privates[I];
const Expr *OrigExpr = Shareds[I];
const Expr *CopyArrayElem = CopyArrayElems[I];
OpaqueValueMapping IdxMapping(
*this,
cast<OpaqueValueExpr>(
cast<ArraySubscriptExpr>(CopyArrayElem)->getIdx()),
RValue::get(IdxVal));
LValue SrcLVal = EmitLValue(CopyArrayElem);
LValue DestLVal = EmitLValue(OrigExpr);
EmitOMPCopy(PrivateExpr->getType(), DestLVal.getAddress(*this),
SrcLVal.getAddress(*this),
cast<VarDecl>(cast<DeclRefExpr>(LHSs[I])->getDecl()),
cast<VarDecl>(cast<DeclRefExpr>(RHSs[I])->getDecl()),
CopyOps[I]);
}
if (!IsInclusive) {
EmitBlock(ExclusiveExitBB);
}
}
EmitBranch((OMPFirstScanLoop == IsInclusive) ? OMPBeforeScanBlock
: OMPAfterScanBlock);
EmitBlock(OMPAfterScanBlock);
}
void CodeGenFunction::EmitOMPDistributeLoop(const OMPLoopDirective &S,
const CodeGenLoopTy &CodeGenLoop,
Expr *IncExpr) {
// Emit the loop iteration variable.
const auto *IVExpr = cast<DeclRefExpr>(S.getIterationVariable());
const auto *IVDecl = cast<VarDecl>(IVExpr->getDecl());
EmitVarDecl(*IVDecl);
// Emit the iterations count variable.
// If it is not a variable, Sema decided to calculate iterations count on each
// iteration (e.g., it is foldable into a constant).
if (const auto *LIExpr = dyn_cast<DeclRefExpr>(S.getLastIteration())) {
EmitVarDecl(*cast<VarDecl>(LIExpr->getDecl()));
// Emit calculation of the iterations count.
EmitIgnoredExpr(S.getCalcLastIteration());
}
CGOpenMPRuntime &RT = CGM.getOpenMPRuntime();
bool HasLastprivateClause = false;
// Check pre-condition.
{
OMPLoopScope PreInitScope(*this, S);
// Skip the entire loop if we don't meet the precondition.
// If the condition constant folds and can be elided, avoid emitting the
// whole loop.
bool CondConstant;
llvm::BasicBlock *ContBlock = nullptr;
if (ConstantFoldsToSimpleInteger(S.getPreCond(), CondConstant)) {
if (!CondConstant)
return;
} else {
llvm::BasicBlock *ThenBlock = createBasicBlock("omp.precond.then");
ContBlock = createBasicBlock("omp.precond.end");
emitPreCond(*this, S, S.getPreCond(), ThenBlock, ContBlock,
getProfileCount(&S));
EmitBlock(ThenBlock);
incrementProfileCounter(&S);
}
emitAlignedClause(*this, S);
// Emit 'then' code.
{
// Emit helper vars inits.
LValue LB = EmitOMPHelperVar(
*this, cast<DeclRefExpr>(
(isOpenMPLoopBoundSharingDirective(S.getDirectiveKind())
? S.getCombinedLowerBoundVariable()
: S.getLowerBoundVariable())));
LValue UB = EmitOMPHelperVar(
*this, cast<DeclRefExpr>(
(isOpenMPLoopBoundSharingDirective(S.getDirectiveKind())
? S.getCombinedUpperBoundVariable()
: S.getUpperBoundVariable())));
LValue ST =
EmitOMPHelperVar(*this, cast<DeclRefExpr>(S.getStrideVariable()));
LValue IL =
EmitOMPHelperVar(*this, cast<DeclRefExpr>(S.getIsLastIterVariable()));
OMPPrivateScope LoopScope(*this);
if (EmitOMPFirstprivateClause(S, LoopScope)) {
// Emit implicit barrier to synchronize threads and avoid data races
// on initialization of firstprivate variables and post-update of
// lastprivate variables.
CGM.getOpenMPRuntime().emitBarrierCall(
*this, S.getBeginLoc(), OMPD_unknown, /*EmitChecks=*/false,
/*ForceSimpleCall=*/true);
}
EmitOMPPrivateClause(S, LoopScope);
if (isOpenMPSimdDirective(S.getDirectiveKind()) &&
!isOpenMPParallelDirective(S.getDirectiveKind()) &&
!isOpenMPTeamsDirective(S.getDirectiveKind()))
EmitOMPReductionClauseInit(S, LoopScope);
HasLastprivateClause = EmitOMPLastprivateClauseInit(S, LoopScope);
EmitOMPPrivateLoopCounters(S, LoopScope);
(void)LoopScope.Privatize();
if (isOpenMPTargetExecutionDirective(S.getDirectiveKind()))
CGM.getOpenMPRuntime().adjustTargetSpecificDataForLambdas(*this, S);
// Detect the distribute schedule kind and chunk.
llvm::Value *Chunk = nullptr;
OpenMPDistScheduleClauseKind ScheduleKind = OMPC_DIST_SCHEDULE_unknown;
if (const auto *C = S.getSingleClause<OMPDistScheduleClause>()) {
ScheduleKind = C->getDistScheduleKind();
if (const Expr *Ch = C->getChunkSize()) {
Chunk = EmitScalarExpr(Ch);
Chunk = EmitScalarConversion(Chunk, Ch->getType(),
S.getIterationVariable()->getType(),
S.getBeginLoc());
}
} else {
// Default behaviour for dist_schedule clause.
CGM.getOpenMPRuntime().getDefaultDistScheduleAndChunk(
*this, S, ScheduleKind, Chunk);
}
const unsigned IVSize = getContext().getTypeSize(IVExpr->getType());
const bool IVSigned = IVExpr->getType()->hasSignedIntegerRepresentation();
// OpenMP [2.10.8, distribute Construct, Description]
// If dist_schedule is specified, kind must be static. If specified,
// iterations are divided into chunks of size chunk_size, chunks are
// assigned to the teams of the league in a round-robin fashion in the
// order of the team number. When no chunk_size is specified, the
// iteration space is divided into chunks that are approximately equal
// in size, and at most one chunk is distributed to each team of the
// league. The size of the chunks is unspecified in this case.
bool StaticChunked = RT.isStaticChunked(
ScheduleKind, /* Chunked */ Chunk != nullptr) &&
isOpenMPLoopBoundSharingDirective(S.getDirectiveKind());
if (RT.isStaticNonchunked(ScheduleKind,
/* Chunked */ Chunk != nullptr) ||
StaticChunked) {
CGOpenMPRuntime::StaticRTInput StaticInit(
IVSize, IVSigned, /* Ordered = */ false, IL.getAddress(*this),
LB.getAddress(*this), UB.getAddress(*this), ST.getAddress(*this),
StaticChunked ? Chunk : nullptr);
RT.emitDistributeStaticInit(*this, S.getBeginLoc(), ScheduleKind,
StaticInit);
JumpDest LoopExit =
getJumpDestInCurrentScope(createBasicBlock("omp.loop.exit"));
// UB = min(UB, GlobalUB);
EmitIgnoredExpr(isOpenMPLoopBoundSharingDirective(S.getDirectiveKind())
? S.getCombinedEnsureUpperBound()
: S.getEnsureUpperBound());
// IV = LB;
EmitIgnoredExpr(isOpenMPLoopBoundSharingDirective(S.getDirectiveKind())
? S.getCombinedInit()
: S.getInit());
const Expr *Cond =
isOpenMPLoopBoundSharingDirective(S.getDirectiveKind())
? S.getCombinedCond()
: S.getCond();
if (StaticChunked)
Cond = S.getCombinedDistCond();
// For static unchunked schedules generate:
//
// 1. For distribute alone, codegen
// while (idx <= UB) {
// BODY;
// ++idx;
// }
//
// 2. When combined with 'for' (e.g. as in 'distribute parallel for')
// while (idx <= UB) {
// <CodeGen rest of pragma>(LB, UB);
// idx += ST;
// }
//
// For static chunk one schedule generate:
//
// while (IV <= GlobalUB) {
// <CodeGen rest of pragma>(LB, UB);
// LB += ST;
// UB += ST;
// UB = min(UB, GlobalUB);
// IV = LB;
// }
//
emitCommonSimdLoop(
*this, S,
[&S](CodeGenFunction &CGF, PrePostActionTy &) {
if (isOpenMPSimdDirective(S.getDirectiveKind()))
CGF.EmitOMPSimdInit(S);
},
[&S, &LoopScope, Cond, IncExpr, LoopExit, &CodeGenLoop,
StaticChunked](CodeGenFunction &CGF, PrePostActionTy &) {
CGF.EmitOMPInnerLoop(
S, LoopScope.requiresCleanups(), Cond, IncExpr,
[&S, LoopExit, &CodeGenLoop](CodeGenFunction &CGF) {
CodeGenLoop(CGF, S, LoopExit);
},
[&S, StaticChunked](CodeGenFunction &CGF) {
if (StaticChunked) {
CGF.EmitIgnoredExpr(S.getCombinedNextLowerBound());
CGF.EmitIgnoredExpr(S.getCombinedNextUpperBound());
CGF.EmitIgnoredExpr(S.getCombinedEnsureUpperBound());
CGF.EmitIgnoredExpr(S.getCombinedInit());
}
});
});
EmitBlock(LoopExit.getBlock());
// Tell the runtime we are done.
RT.emitForStaticFinish(*this, S.getEndLoc(), S.getDirectiveKind());
} else {
// Emit the outer loop, which requests its work chunk [LB..UB] from
// runtime and runs the inner loop to process it.
const OMPLoopArguments LoopArguments = {
LB.getAddress(*this), UB.getAddress(*this), ST.getAddress(*this),
IL.getAddress(*this), Chunk};
EmitOMPDistributeOuterLoop(ScheduleKind, S, LoopScope, LoopArguments,
CodeGenLoop);
}
if (isOpenMPSimdDirective(S.getDirectiveKind())) {
EmitOMPSimdFinal(S, [IL, &S](CodeGenFunction &CGF) {
return CGF.Builder.CreateIsNotNull(
CGF.EmitLoadOfScalar(IL, S.getBeginLoc()));
});
}
if (isOpenMPSimdDirective(S.getDirectiveKind()) &&
!isOpenMPParallelDirective(S.getDirectiveKind()) &&
!isOpenMPTeamsDirective(S.getDirectiveKind())) {
EmitOMPReductionClauseFinal(S, OMPD_simd);
// Emit post-update of the reduction variables if IsLastIter != 0.
emitPostUpdateForReductionClause(
*this, S, [IL, &S](CodeGenFunction &CGF) {
return CGF.Builder.CreateIsNotNull(
CGF.EmitLoadOfScalar(IL, S.getBeginLoc()));
});
}
// Emit final copy of the lastprivate variables if IsLastIter != 0.
if (HasLastprivateClause) {
EmitOMPLastprivateClauseFinal(
S, /*NoFinals=*/false,
Builder.CreateIsNotNull(EmitLoadOfScalar(IL, S.getBeginLoc())));
}
}
// We're now done with the loop, so jump to the continuation block.
if (ContBlock) {
EmitBranch(ContBlock);
EmitBlock(ContBlock, true);
}
}
}
void CodeGenFunction::EmitOMPDistributeDirective(
const OMPDistributeDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &) {
CGF.EmitOMPDistributeLoop(S, emitOMPLoopBodyWithStopPoint, S.getInc());
};
OMPLexicalScope Scope(*this, S, OMPD_unknown);
CGM.getOpenMPRuntime().emitInlinedDirective(*this, OMPD_distribute, CodeGen);
}
static llvm::Function *emitOutlinedOrderedFunction(CodeGenModule &CGM,
const CapturedStmt *S,
SourceLocation Loc) {
CodeGenFunction CGF(CGM, /*suppressNewContext=*/true);
CodeGenFunction::CGCapturedStmtInfo CapStmtInfo;
CGF.CapturedStmtInfo = &CapStmtInfo;
llvm::Function *Fn = CGF.GenerateOpenMPCapturedStmtFunction(*S, Loc);
Fn->setDoesNotRecurse();
return Fn;
}
void CodeGenFunction::EmitOMPOrderedDirective(const OMPOrderedDirective &S) {
if (S.hasClausesOfKind<OMPDependClause>()) {
assert(!S.hasAssociatedStmt() &&
"No associated statement must be in ordered depend construct.");
for (const auto *DC : S.getClausesOfKind<OMPDependClause>())
CGM.getOpenMPRuntime().emitDoacrossOrdered(*this, DC);
return;
}
const auto *C = S.getSingleClause<OMPSIMDClause>();
auto &&CodeGen = [&S, C, this](CodeGenFunction &CGF,
PrePostActionTy &Action) {
const CapturedStmt *CS = S.getInnermostCapturedStmt();
if (C) {
llvm::SmallVector<llvm::Value *, 16> CapturedVars;
CGF.GenerateOpenMPCapturedVars(*CS, CapturedVars);
llvm::Function *OutlinedFn =
emitOutlinedOrderedFunction(CGM, CS, S.getBeginLoc());
CGM.getOpenMPRuntime().emitOutlinedFunctionCall(CGF, S.getBeginLoc(),
OutlinedFn, CapturedVars);
} else {
Action.Enter(CGF);
CGF.EmitStmt(CS->getCapturedStmt());
}
};
OMPLexicalScope Scope(*this, S, OMPD_unknown);
CGM.getOpenMPRuntime().emitOrderedRegion(*this, CodeGen, S.getBeginLoc(), !C);
}
static llvm::Value *convertToScalarValue(CodeGenFunction &CGF, RValue Val,
QualType SrcType, QualType DestType,
SourceLocation Loc) {
assert(CGF.hasScalarEvaluationKind(DestType) &&
"DestType must have scalar evaluation kind.");
assert(!Val.isAggregate() && "Must be a scalar or complex.");
return Val.isScalar() ? CGF.EmitScalarConversion(Val.getScalarVal(), SrcType,
DestType, Loc)
: CGF.EmitComplexToScalarConversion(
Val.getComplexVal(), SrcType, DestType, Loc);
}
static CodeGenFunction::ComplexPairTy
convertToComplexValue(CodeGenFunction &CGF, RValue Val, QualType SrcType,
QualType DestType, SourceLocation Loc) {
assert(CGF.getEvaluationKind(DestType) == TEK_Complex &&
"DestType must have complex evaluation kind.");
CodeGenFunction::ComplexPairTy ComplexVal;
if (Val.isScalar()) {
// Convert the input element to the element type of the complex.
QualType DestElementType =
DestType->castAs<ComplexType>()->getElementType();
llvm::Value *ScalarVal = CGF.EmitScalarConversion(
Val.getScalarVal(), SrcType, DestElementType, Loc);
ComplexVal = CodeGenFunction::ComplexPairTy(
ScalarVal, llvm::Constant::getNullValue(ScalarVal->getType()));
} else {
assert(Val.isComplex() && "Must be a scalar or complex.");
QualType SrcElementType = SrcType->castAs<ComplexType>()->getElementType();
QualType DestElementType =
DestType->castAs<ComplexType>()->getElementType();
ComplexVal.first = CGF.EmitScalarConversion(
Val.getComplexVal().first, SrcElementType, DestElementType, Loc);
ComplexVal.second = CGF.EmitScalarConversion(
Val.getComplexVal().second, SrcElementType, DestElementType, Loc);
}
return ComplexVal;
}
static void emitSimpleAtomicStore(CodeGenFunction &CGF, llvm::AtomicOrdering AO,
LValue LVal, RValue RVal) {
if (LVal.isGlobalReg())
CGF.EmitStoreThroughGlobalRegLValue(RVal, LVal);
else
CGF.EmitAtomicStore(RVal, LVal, AO, LVal.isVolatile(), /*isInit=*/false);
}
static RValue emitSimpleAtomicLoad(CodeGenFunction &CGF,
llvm::AtomicOrdering AO, LValue LVal,
SourceLocation Loc) {
if (LVal.isGlobalReg())
return CGF.EmitLoadOfLValue(LVal, Loc);
return CGF.EmitAtomicLoad(
LVal, Loc, llvm::AtomicCmpXchgInst::getStrongestFailureOrdering(AO),
LVal.isVolatile());
}
void CodeGenFunction::emitOMPSimpleStore(LValue LVal, RValue RVal,
QualType RValTy, SourceLocation Loc) {
switch (getEvaluationKind(LVal.getType())) {
case TEK_Scalar:
EmitStoreThroughLValue(RValue::get(convertToScalarValue(
*this, RVal, RValTy, LVal.getType(), Loc)),
LVal);
break;
case TEK_Complex:
EmitStoreOfComplex(
convertToComplexValue(*this, RVal, RValTy, LVal.getType(), Loc), LVal,
/*isInit=*/false);
break;
case TEK_Aggregate:
llvm_unreachable("Must be a scalar or complex.");
}
}
static void emitOMPAtomicReadExpr(CodeGenFunction &CGF, llvm::AtomicOrdering AO,
const Expr *X, const Expr *V,
SourceLocation Loc) {
// v = x;
assert(V->isLValue() && "V of 'omp atomic read' is not lvalue");
assert(X->isLValue() && "X of 'omp atomic read' is not lvalue");
LValue XLValue = CGF.EmitLValue(X);
LValue VLValue = CGF.EmitLValue(V);
RValue Res = emitSimpleAtomicLoad(CGF, AO, XLValue, Loc);
// OpenMP, 2.17.7, atomic Construct
// If the read or capture clause is specified and the acquire, acq_rel, or
// seq_cst clause is specified then the strong flush on exit from the atomic
// operation is also an acquire flush.
switch (AO) {
case llvm::AtomicOrdering::Acquire:
case llvm::AtomicOrdering::AcquireRelease:
case llvm::AtomicOrdering::SequentiallyConsistent:
CGF.CGM.getOpenMPRuntime().emitFlush(CGF, llvm::None, Loc,
llvm::AtomicOrdering::Acquire);
break;
case llvm::AtomicOrdering::Monotonic:
case llvm::AtomicOrdering::Release:
break;
case llvm::AtomicOrdering::NotAtomic:
case llvm::AtomicOrdering::Unordered:
llvm_unreachable("Unexpected ordering.");
}
CGF.emitOMPSimpleStore(VLValue, Res, X->getType().getNonReferenceType(), Loc);
CGF.CGM.getOpenMPRuntime().checkAndEmitLastprivateConditional(CGF, V);
}
static void emitOMPAtomicWriteExpr(CodeGenFunction &CGF,
llvm::AtomicOrdering AO, const Expr *X,
const Expr *E, SourceLocation Loc) {
// x = expr;
assert(X->isLValue() && "X of 'omp atomic write' is not lvalue");
emitSimpleAtomicStore(CGF, AO, CGF.EmitLValue(X), CGF.EmitAnyExpr(E));
CGF.CGM.getOpenMPRuntime().checkAndEmitLastprivateConditional(CGF, X);
// OpenMP, 2.17.7, atomic Construct
// If the write, update, or capture clause is specified and the release,
// acq_rel, or seq_cst clause is specified then the strong flush on entry to
// the atomic operation is also a release flush.
switch (AO) {
case llvm::AtomicOrdering::Release:
case llvm::AtomicOrdering::AcquireRelease:
case llvm::AtomicOrdering::SequentiallyConsistent:
CGF.CGM.getOpenMPRuntime().emitFlush(CGF, llvm::None, Loc,
llvm::AtomicOrdering::Release);
break;
case llvm::AtomicOrdering::Acquire:
case llvm::AtomicOrdering::Monotonic:
break;
case llvm::AtomicOrdering::NotAtomic:
case llvm::AtomicOrdering::Unordered:
llvm_unreachable("Unexpected ordering.");
}
}
static std::pair<bool, RValue> emitOMPAtomicRMW(CodeGenFunction &CGF, LValue X,
RValue Update,
BinaryOperatorKind BO,
llvm::AtomicOrdering AO,
bool IsXLHSInRHSPart) {
ASTContext &Context = CGF.getContext();
// Allow atomicrmw only if 'x' and 'update' are integer values, lvalue for 'x'
// expression is simple and atomic is allowed for the given type for the
// target platform.
if (BO == BO_Comma || !Update.isScalar() ||
!Update.getScalarVal()->getType()->isIntegerTy() || !X.isSimple() ||
(!isa<llvm::ConstantInt>(Update.getScalarVal()) &&
(Update.getScalarVal()->getType() !=
X.getAddress(CGF).getElementType())) ||
!X.getAddress(CGF).getElementType()->isIntegerTy() ||
!Context.getTargetInfo().hasBuiltinAtomic(
Context.getTypeSize(X.getType()), Context.toBits(X.getAlignment())))
return std::make_pair(false, RValue::get(nullptr));
llvm::AtomicRMWInst::BinOp RMWOp;
switch (BO) {
case BO_Add:
RMWOp = llvm::AtomicRMWInst::Add;
break;
case BO_Sub:
if (!IsXLHSInRHSPart)
return std::make_pair(false, RValue::get(nullptr));
RMWOp = llvm::AtomicRMWInst::Sub;
break;
case BO_And:
RMWOp = llvm::AtomicRMWInst::And;
break;
case BO_Or:
RMWOp = llvm::AtomicRMWInst::Or;
break;
case BO_Xor:
RMWOp = llvm::AtomicRMWInst::Xor;
break;
case BO_LT:
RMWOp = X.getType()->hasSignedIntegerRepresentation()
? (IsXLHSInRHSPart ? llvm::AtomicRMWInst::Min
: llvm::AtomicRMWInst::Max)
: (IsXLHSInRHSPart ? llvm::AtomicRMWInst::UMin
: llvm::AtomicRMWInst::UMax);
break;
case BO_GT:
RMWOp = X.getType()->hasSignedIntegerRepresentation()
? (IsXLHSInRHSPart ? llvm::AtomicRMWInst::Max
: llvm::AtomicRMWInst::Min)
: (IsXLHSInRHSPart ? llvm::AtomicRMWInst::UMax
: llvm::AtomicRMWInst::UMin);
break;
case BO_Assign:
RMWOp = llvm::AtomicRMWInst::Xchg;
break;
case BO_Mul:
case BO_Div:
case BO_Rem:
case BO_Shl:
case BO_Shr:
case BO_LAnd:
case BO_LOr:
return std::make_pair(false, RValue::get(nullptr));
case BO_PtrMemD:
case BO_PtrMemI:
case BO_LE:
case BO_GE:
case BO_EQ:
case BO_NE:
case BO_Cmp:
case BO_AddAssign:
case BO_SubAssign:
case BO_AndAssign:
case BO_OrAssign:
case BO_XorAssign:
case BO_MulAssign:
case BO_DivAssign:
case BO_RemAssign:
case BO_ShlAssign:
case BO_ShrAssign:
case BO_Comma:
llvm_unreachable("Unsupported atomic update operation");
}
llvm::Value *UpdateVal = Update.getScalarVal();
if (auto *IC = dyn_cast<llvm::ConstantInt>(UpdateVal)) {
UpdateVal = CGF.Builder.CreateIntCast(
IC, X.getAddress(CGF).getElementType(),
X.getType()->hasSignedIntegerRepresentation());
}
llvm::Value *Res =
CGF.Builder.CreateAtomicRMW(RMWOp, X.getPointer(CGF), UpdateVal, AO);
return std::make_pair(true, RValue::get(Res));
}
std::pair<bool, RValue> CodeGenFunction::EmitOMPAtomicSimpleUpdateExpr(
LValue X, RValue E, BinaryOperatorKind BO, bool IsXLHSInRHSPart,
llvm::AtomicOrdering AO, SourceLocation Loc,
const llvm::function_ref<RValue(RValue)> CommonGen) {
// Update expressions are allowed to have the following forms:
// x binop= expr; -> xrval + expr;
// x++, ++x -> xrval + 1;
// x--, --x -> xrval - 1;
// x = x binop expr; -> xrval binop expr
// x = expr Op x; - > expr binop xrval;
auto Res = emitOMPAtomicRMW(*this, X, E, BO, AO, IsXLHSInRHSPart);
if (!Res.first) {
if (X.isGlobalReg()) {
// Emit an update expression: 'xrval' binop 'expr' or 'expr' binop
// 'xrval'.
EmitStoreThroughLValue(CommonGen(EmitLoadOfLValue(X, Loc)), X);
} else {
// Perform compare-and-swap procedure.
EmitAtomicUpdate(X, AO, CommonGen, X.getType().isVolatileQualified());
}
}
return Res;
}
static void emitOMPAtomicUpdateExpr(CodeGenFunction &CGF,
llvm::AtomicOrdering AO, const Expr *X,
const Expr *E, const Expr *UE,
bool IsXLHSInRHSPart, SourceLocation Loc) {
assert(isa<BinaryOperator>(UE->IgnoreImpCasts()) &&
"Update expr in 'atomic update' must be a binary operator.");
const auto *BOUE = cast<BinaryOperator>(UE->IgnoreImpCasts());
// Update expressions are allowed to have the following forms:
// x binop= expr; -> xrval + expr;
// x++, ++x -> xrval + 1;
// x--, --x -> xrval - 1;
// x = x binop expr; -> xrval binop expr
// x = expr Op x; - > expr binop xrval;
assert(X->isLValue() && "X of 'omp atomic update' is not lvalue");
LValue XLValue = CGF.EmitLValue(X);
RValue ExprRValue = CGF.EmitAnyExpr(E);
const auto *LHS = cast<OpaqueValueExpr>(BOUE->getLHS()->IgnoreImpCasts());
const auto *RHS = cast<OpaqueValueExpr>(BOUE->getRHS()->IgnoreImpCasts());
const OpaqueValueExpr *XRValExpr = IsXLHSInRHSPart ? LHS : RHS;
const OpaqueValueExpr *ERValExpr = IsXLHSInRHSPart ? RHS : LHS;
auto &&Gen = [&CGF, UE, ExprRValue, XRValExpr, ERValExpr](RValue XRValue) {
CodeGenFunction::OpaqueValueMapping MapExpr(CGF, ERValExpr, ExprRValue);
CodeGenFunction::OpaqueValueMapping MapX(CGF, XRValExpr, XRValue);
return CGF.EmitAnyExpr(UE);
};
(void)CGF.EmitOMPAtomicSimpleUpdateExpr(
XLValue, ExprRValue, BOUE->getOpcode(), IsXLHSInRHSPart, AO, Loc, Gen);
CGF.CGM.getOpenMPRuntime().checkAndEmitLastprivateConditional(CGF, X);
// OpenMP, 2.17.7, atomic Construct
// If the write, update, or capture clause is specified and the release,
// acq_rel, or seq_cst clause is specified then the strong flush on entry to
// the atomic operation is also a release flush.
switch (AO) {
case llvm::AtomicOrdering::Release:
case llvm::AtomicOrdering::AcquireRelease:
case llvm::AtomicOrdering::SequentiallyConsistent:
CGF.CGM.getOpenMPRuntime().emitFlush(CGF, llvm::None, Loc,
llvm::AtomicOrdering::Release);
break;
case llvm::AtomicOrdering::Acquire:
case llvm::AtomicOrdering::Monotonic:
break;
case llvm::AtomicOrdering::NotAtomic:
case llvm::AtomicOrdering::Unordered:
llvm_unreachable("Unexpected ordering.");
}
}
static RValue convertToType(CodeGenFunction &CGF, RValue Value,
QualType SourceType, QualType ResType,
SourceLocation Loc) {
switch (CGF.getEvaluationKind(ResType)) {
case TEK_Scalar:
return RValue::get(
convertToScalarValue(CGF, Value, SourceType, ResType, Loc));
case TEK_Complex: {
auto Res = convertToComplexValue(CGF, Value, SourceType, ResType, Loc);
return RValue::getComplex(Res.first, Res.second);
}
case TEK_Aggregate:
break;
}
llvm_unreachable("Must be a scalar or complex.");
}
static void emitOMPAtomicCaptureExpr(CodeGenFunction &CGF,
llvm::AtomicOrdering AO,
bool IsPostfixUpdate, const Expr *V,
const Expr *X, const Expr *E,
const Expr *UE, bool IsXLHSInRHSPart,
SourceLocation Loc) {
assert(X->isLValue() && "X of 'omp atomic capture' is not lvalue");
assert(V->isLValue() && "V of 'omp atomic capture' is not lvalue");
RValue NewVVal;
LValue VLValue = CGF.EmitLValue(V);
LValue XLValue = CGF.EmitLValue(X);
RValue ExprRValue = CGF.EmitAnyExpr(E);
QualType NewVValType;
if (UE) {
// 'x' is updated with some additional value.
assert(isa<BinaryOperator>(UE->IgnoreImpCasts()) &&
"Update expr in 'atomic capture' must be a binary operator.");
const auto *BOUE = cast<BinaryOperator>(UE->IgnoreImpCasts());
// Update expressions are allowed to have the following forms:
// x binop= expr; -> xrval + expr;
// x++, ++x -> xrval + 1;
// x--, --x -> xrval - 1;
// x = x binop expr; -> xrval binop expr
// x = expr Op x; - > expr binop xrval;
const auto *LHS = cast<OpaqueValueExpr>(BOUE->getLHS()->IgnoreImpCasts());
const auto *RHS = cast<OpaqueValueExpr>(BOUE->getRHS()->IgnoreImpCasts());
const OpaqueValueExpr *XRValExpr = IsXLHSInRHSPart ? LHS : RHS;
NewVValType = XRValExpr->getType();
const OpaqueValueExpr *ERValExpr = IsXLHSInRHSPart ? RHS : LHS;
auto &&Gen = [&CGF, &NewVVal, UE, ExprRValue, XRValExpr, ERValExpr,
IsPostfixUpdate](RValue XRValue) {
CodeGenFunction::OpaqueValueMapping MapExpr(CGF, ERValExpr, ExprRValue);
CodeGenFunction::OpaqueValueMapping MapX(CGF, XRValExpr, XRValue);
RValue Res = CGF.EmitAnyExpr(UE);
NewVVal = IsPostfixUpdate ? XRValue : Res;
return Res;
};
auto Res = CGF.EmitOMPAtomicSimpleUpdateExpr(
XLValue, ExprRValue, BOUE->getOpcode(), IsXLHSInRHSPart, AO, Loc, Gen);
CGF.CGM.getOpenMPRuntime().checkAndEmitLastprivateConditional(CGF, X);
if (Res.first) {
// 'atomicrmw' instruction was generated.
if (IsPostfixUpdate) {
// Use old value from 'atomicrmw'.
NewVVal = Res.second;
} else {
// 'atomicrmw' does not provide new value, so evaluate it using old
// value of 'x'.
CodeGenFunction::OpaqueValueMapping MapExpr(CGF, ERValExpr, ExprRValue);
CodeGenFunction::OpaqueValueMapping MapX(CGF, XRValExpr, Res.second);
NewVVal = CGF.EmitAnyExpr(UE);
}
}
} else {
// 'x' is simply rewritten with some 'expr'.
NewVValType = X->getType().getNonReferenceType();
ExprRValue = convertToType(CGF, ExprRValue, E->getType(),
X->getType().getNonReferenceType(), Loc);
auto &&Gen = [&NewVVal, ExprRValue](RValue XRValue) {
NewVVal = XRValue;
return ExprRValue;
};
// Try to perform atomicrmw xchg, otherwise simple exchange.
auto Res = CGF.EmitOMPAtomicSimpleUpdateExpr(
XLValue, ExprRValue, /*BO=*/BO_Assign, /*IsXLHSInRHSPart=*/false, AO,
Loc, Gen);
CGF.CGM.getOpenMPRuntime().checkAndEmitLastprivateConditional(CGF, X);
if (Res.first) {
// 'atomicrmw' instruction was generated.
NewVVal = IsPostfixUpdate ? Res.second : ExprRValue;
}
}
// Emit post-update store to 'v' of old/new 'x' value.
CGF.emitOMPSimpleStore(VLValue, NewVVal, NewVValType, Loc);
CGF.CGM.getOpenMPRuntime().checkAndEmitLastprivateConditional(CGF, V);
// OpenMP, 2.17.7, atomic Construct
// If the write, update, or capture clause is specified and the release,
// acq_rel, or seq_cst clause is specified then the strong flush on entry to
// the atomic operation is also a release flush.
// If the read or capture clause is specified and the acquire, acq_rel, or
// seq_cst clause is specified then the strong flush on exit from the atomic
// operation is also an acquire flush.
switch (AO) {
case llvm::AtomicOrdering::Release:
CGF.CGM.getOpenMPRuntime().emitFlush(CGF, llvm::None, Loc,
llvm::AtomicOrdering::Release);
break;
case llvm::AtomicOrdering::Acquire:
CGF.CGM.getOpenMPRuntime().emitFlush(CGF, llvm::None, Loc,
llvm::AtomicOrdering::Acquire);
break;
case llvm::AtomicOrdering::AcquireRelease:
case llvm::AtomicOrdering::SequentiallyConsistent:
CGF.CGM.getOpenMPRuntime().emitFlush(CGF, llvm::None, Loc,
llvm::AtomicOrdering::AcquireRelease);
break;
case llvm::AtomicOrdering::Monotonic:
break;
case llvm::AtomicOrdering::NotAtomic:
case llvm::AtomicOrdering::Unordered:
llvm_unreachable("Unexpected ordering.");
}
}
static void emitOMPAtomicExpr(CodeGenFunction &CGF, OpenMPClauseKind Kind,
llvm::AtomicOrdering AO, bool IsPostfixUpdate,
const Expr *X, const Expr *V, const Expr *E,
const Expr *UE, bool IsXLHSInRHSPart,
SourceLocation Loc) {
switch (Kind) {
case OMPC_read:
emitOMPAtomicReadExpr(CGF, AO, X, V, Loc);
break;
case OMPC_write:
emitOMPAtomicWriteExpr(CGF, AO, X, E, Loc);
break;
case OMPC_unknown:
case OMPC_update:
emitOMPAtomicUpdateExpr(CGF, AO, X, E, UE, IsXLHSInRHSPart, Loc);
break;
case OMPC_capture:
emitOMPAtomicCaptureExpr(CGF, AO, IsPostfixUpdate, V, X, E, UE,
IsXLHSInRHSPart, Loc);
break;
case OMPC_if:
case OMPC_final:
case OMPC_num_threads:
case OMPC_private:
case OMPC_firstprivate:
case OMPC_lastprivate:
case OMPC_reduction:
case OMPC_task_reduction:
case OMPC_in_reduction:
case OMPC_safelen:
case OMPC_simdlen:
case OMPC_sizes:
case OMPC_full:
case OMPC_partial:
case OMPC_allocator:
case OMPC_allocate:
case OMPC_collapse:
case OMPC_default:
case OMPC_seq_cst:
case OMPC_acq_rel:
case OMPC_acquire:
case OMPC_release:
case OMPC_relaxed:
case OMPC_shared:
case OMPC_linear:
case OMPC_aligned:
case OMPC_copyin:
case OMPC_copyprivate:
case OMPC_flush:
case OMPC_depobj:
case OMPC_proc_bind:
case OMPC_schedule:
case OMPC_ordered:
case OMPC_nowait:
case OMPC_untied:
case OMPC_threadprivate:
case OMPC_depend:
case OMPC_mergeable:
case OMPC_device:
case OMPC_threads:
case OMPC_simd:
case OMPC_map:
case OMPC_num_teams:
case OMPC_thread_limit:
case OMPC_priority:
case OMPC_grainsize:
case OMPC_nogroup:
case OMPC_num_tasks:
case OMPC_hint:
case OMPC_dist_schedule:
case OMPC_defaultmap:
case OMPC_uniform:
case OMPC_to:
case OMPC_from:
case OMPC_use_device_ptr:
case OMPC_use_device_addr:
case OMPC_is_device_ptr:
case OMPC_unified_address:
case OMPC_unified_shared_memory:
case OMPC_reverse_offload:
case OMPC_dynamic_allocators:
case OMPC_atomic_default_mem_order:
case OMPC_device_type:
case OMPC_match:
case OMPC_nontemporal:
case OMPC_order:
case OMPC_destroy:
case OMPC_detach:
case OMPC_inclusive:
case OMPC_exclusive:
case OMPC_uses_allocators:
case OMPC_affinity:
case OMPC_init:
case OMPC_inbranch:
case OMPC_notinbranch:
case OMPC_link:
case OMPC_use:
case OMPC_novariants:
case OMPC_nocontext:
case OMPC_filter:
llvm_unreachable("Clause is not allowed in 'omp atomic'.");
}
}
void CodeGenFunction::EmitOMPAtomicDirective(const OMPAtomicDirective &S) {
llvm::AtomicOrdering AO = llvm::AtomicOrdering::Monotonic;
bool MemOrderingSpecified = false;
if (S.getSingleClause<OMPSeqCstClause>()) {
AO = llvm::AtomicOrdering::SequentiallyConsistent;
MemOrderingSpecified = true;
} else if (S.getSingleClause<OMPAcqRelClause>()) {
AO = llvm::AtomicOrdering::AcquireRelease;
MemOrderingSpecified = true;
} else if (S.getSingleClause<OMPAcquireClause>()) {
AO = llvm::AtomicOrdering::Acquire;
MemOrderingSpecified = true;
} else if (S.getSingleClause<OMPReleaseClause>()) {
AO = llvm::AtomicOrdering::Release;
MemOrderingSpecified = true;
} else if (S.getSingleClause<OMPRelaxedClause>()) {
AO = llvm::AtomicOrdering::Monotonic;
MemOrderingSpecified = true;
}
OpenMPClauseKind Kind = OMPC_unknown;
for (const OMPClause *C : S.clauses()) {
// Find first clause (skip seq_cst|acq_rel|aqcuire|release|relaxed clause,
// if it is first).
if (C->getClauseKind() != OMPC_seq_cst &&
C->getClauseKind() != OMPC_acq_rel &&
C->getClauseKind() != OMPC_acquire &&
C->getClauseKind() != OMPC_release &&
C->getClauseKind() != OMPC_relaxed && C->getClauseKind() != OMPC_hint) {
Kind = C->getClauseKind();
break;
}
}
if (!MemOrderingSpecified) {
llvm::AtomicOrdering DefaultOrder =
CGM.getOpenMPRuntime().getDefaultMemoryOrdering();
if (DefaultOrder == llvm::AtomicOrdering::Monotonic ||
DefaultOrder == llvm::AtomicOrdering::SequentiallyConsistent ||
(DefaultOrder == llvm::AtomicOrdering::AcquireRelease &&
Kind == OMPC_capture)) {
AO = DefaultOrder;
} else if (DefaultOrder == llvm::AtomicOrdering::AcquireRelease) {
if (Kind == OMPC_unknown || Kind == OMPC_update || Kind == OMPC_write) {
AO = llvm::AtomicOrdering::Release;
} else if (Kind == OMPC_read) {
assert(Kind == OMPC_read && "Unexpected atomic kind.");
AO = llvm::AtomicOrdering::Acquire;
}
}
}
LexicalScope Scope(*this, S.getSourceRange());
EmitStopPoint(S.getAssociatedStmt());
emitOMPAtomicExpr(*this, Kind, AO, S.isPostfixUpdate(), S.getX(), S.getV(),
S.getExpr(), S.getUpdateExpr(), S.isXLHSInRHSPart(),
S.getBeginLoc());
}
static void emitCommonOMPTargetDirective(CodeGenFunction &CGF,
const OMPExecutableDirective &S,
const RegionCodeGenTy &CodeGen) {
assert(isOpenMPTargetExecutionDirective(S.getDirectiveKind()));
CodeGenModule &CGM = CGF.CGM;
// On device emit this construct as inlined code.
if (CGM.getLangOpts().OpenMPIsDevice) {
OMPLexicalScope Scope(CGF, S, OMPD_target);
CGM.getOpenMPRuntime().emitInlinedDirective(
CGF, OMPD_target, [&S](CodeGenFunction &CGF, PrePostActionTy &) {
CGF.EmitStmt(S.getInnermostCapturedStmt()->getCapturedStmt());
});
return;
}
auto LPCRegion =
CGOpenMPRuntime::LastprivateConditionalRAII::disable(CGF, S);
llvm::Function *Fn = nullptr;
llvm::Constant *FnID = nullptr;
const Expr *IfCond = nullptr;
// Check for the at most one if clause associated with the target region.
for (const auto *C : S.getClausesOfKind<OMPIfClause>()) {
if (C->getNameModifier() == OMPD_unknown ||
C->getNameModifier() == OMPD_target) {
IfCond = C->getCondition();
break;
}
}
// Check if we have any device clause associated with the directive.
llvm::PointerIntPair<const Expr *, 2, OpenMPDeviceClauseModifier> Device(
nullptr, OMPC_DEVICE_unknown);
if (auto *C = S.getSingleClause<OMPDeviceClause>())
Device.setPointerAndInt(C->getDevice(), C->getModifier());
// Check if we have an if clause whose conditional always evaluates to false
// or if we do not have any targets specified. If so the target region is not
// an offload entry point.
bool IsOffloadEntry = true;
if (IfCond) {
bool Val;
if (CGF.ConstantFoldsToSimpleInteger(IfCond, Val) && !Val)
IsOffloadEntry = false;
}
if (CGM.getLangOpts().OMPTargetTriples.empty())
IsOffloadEntry = false;
assert(CGF.CurFuncDecl && "No parent declaration for target region!");
StringRef ParentName;
// In case we have Ctors/Dtors we use the complete type variant to produce
// the mangling of the device outlined kernel.
if (const auto *D = dyn_cast<CXXConstructorDecl>(CGF.CurFuncDecl))
ParentName = CGM.getMangledName(GlobalDecl(D, Ctor_Complete));
else if (const auto *D = dyn_cast<CXXDestructorDecl>(CGF.CurFuncDecl))
ParentName = CGM.getMangledName(GlobalDecl(D, Dtor_Complete));
else
ParentName =
CGM.getMangledName(GlobalDecl(cast<FunctionDecl>(CGF.CurFuncDecl)));
// Emit target region as a standalone region.
CGM.getOpenMPRuntime().emitTargetOutlinedFunction(S, ParentName, Fn, FnID,
IsOffloadEntry, CodeGen);
OMPLexicalScope Scope(CGF, S, OMPD_task);
auto &&SizeEmitter =
[IsOffloadEntry](CodeGenFunction &CGF,
const OMPLoopDirective &D) -> llvm::Value * {
if (IsOffloadEntry) {
OMPLoopScope(CGF, D);
// Emit calculation of the iterations count.
llvm::Value *NumIterations = CGF.EmitScalarExpr(D.getNumIterations());
NumIterations = CGF.Builder.CreateIntCast(NumIterations, CGF.Int64Ty,
/*isSigned=*/false);
return NumIterations;
}
return nullptr;
};
CGM.getOpenMPRuntime().emitTargetCall(CGF, S, Fn, FnID, IfCond, Device,
SizeEmitter);
}
static void emitTargetRegion(CodeGenFunction &CGF, const OMPTargetDirective &S,
PrePostActionTy &Action) {
Action.Enter(CGF);
CodeGenFunction::OMPPrivateScope PrivateScope(CGF);
(void)CGF.EmitOMPFirstprivateClause(S, PrivateScope);
CGF.EmitOMPPrivateClause(S, PrivateScope);
(void)PrivateScope.Privatize();
if (isOpenMPTargetExecutionDirective(S.getDirectiveKind()))
CGF.CGM.getOpenMPRuntime().adjustTargetSpecificDataForLambdas(CGF, S);
CGF.EmitStmt(S.getCapturedStmt(OMPD_target)->getCapturedStmt());
CGF.EnsureInsertPoint();
}
void CodeGenFunction::EmitOMPTargetDeviceFunction(CodeGenModule &CGM,
StringRef ParentName,
const OMPTargetDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitTargetRegion(CGF, S, Action);
};
llvm::Function *Fn;
llvm::Constant *Addr;
// Emit target region as a standalone region.
CGM.getOpenMPRuntime().emitTargetOutlinedFunction(
S, ParentName, Fn, Addr, /*IsOffloadEntry=*/true, CodeGen);
assert(Fn && Addr && "Target device function emission failed.");
}
void CodeGenFunction::EmitOMPTargetDirective(const OMPTargetDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitTargetRegion(CGF, S, Action);
};
emitCommonOMPTargetDirective(*this, S, CodeGen);
}
static void emitCommonOMPTeamsDirective(CodeGenFunction &CGF,
const OMPExecutableDirective &S,
OpenMPDirectiveKind InnermostKind,
const RegionCodeGenTy &CodeGen) {
const CapturedStmt *CS = S.getCapturedStmt(OMPD_teams);
llvm::Function *OutlinedFn =
CGF.CGM.getOpenMPRuntime().emitTeamsOutlinedFunction(
S, *CS->getCapturedDecl()->param_begin(), InnermostKind, CodeGen);
const auto *NT = S.getSingleClause<OMPNumTeamsClause>();
const auto *TL = S.getSingleClause<OMPThreadLimitClause>();
if (NT || TL) {
const Expr *NumTeams = NT ? NT->getNumTeams() : nullptr;
const Expr *ThreadLimit = TL ? TL->getThreadLimit() : nullptr;
CGF.CGM.getOpenMPRuntime().emitNumTeamsClause(CGF, NumTeams, ThreadLimit,
S.getBeginLoc());
}
OMPTeamsScope Scope(CGF, S);
llvm::SmallVector<llvm::Value *, 16> CapturedVars;
CGF.GenerateOpenMPCapturedVars(*CS, CapturedVars);
CGF.CGM.getOpenMPRuntime().emitTeamsCall(CGF, S, S.getBeginLoc(), OutlinedFn,
CapturedVars);
}
void CodeGenFunction::EmitOMPTeamsDirective(const OMPTeamsDirective &S) {
// Emit teams region as a standalone region.
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
Action.Enter(CGF);
OMPPrivateScope PrivateScope(CGF);
(void)CGF.EmitOMPFirstprivateClause(S, PrivateScope);
CGF.EmitOMPPrivateClause(S, PrivateScope);
CGF.EmitOMPReductionClauseInit(S, PrivateScope);
(void)PrivateScope.Privatize();
CGF.EmitStmt(S.getCapturedStmt(OMPD_teams)->getCapturedStmt());
CGF.EmitOMPReductionClauseFinal(S, /*ReductionKind=*/OMPD_teams);
};
emitCommonOMPTeamsDirective(*this, S, OMPD_distribute, CodeGen);
emitPostUpdateForReductionClause(*this, S,
[](CodeGenFunction &) { return nullptr; });
}
static void emitTargetTeamsRegion(CodeGenFunction &CGF, PrePostActionTy &Action,
const OMPTargetTeamsDirective &S) {
auto *CS = S.getCapturedStmt(OMPD_teams);
Action.Enter(CGF);
// Emit teams region as a standalone region.
auto &&CodeGen = [&S, CS](CodeGenFunction &CGF, PrePostActionTy &Action) {
Action.Enter(CGF);
CodeGenFunction::OMPPrivateScope PrivateScope(CGF);
(void)CGF.EmitOMPFirstprivateClause(S, PrivateScope);
CGF.EmitOMPPrivateClause(S, PrivateScope);
CGF.EmitOMPReductionClauseInit(S, PrivateScope);
(void)PrivateScope.Privatize();
if (isOpenMPTargetExecutionDirective(S.getDirectiveKind()))
CGF.CGM.getOpenMPRuntime().adjustTargetSpecificDataForLambdas(CGF, S);
CGF.EmitStmt(CS->getCapturedStmt());
CGF.EmitOMPReductionClauseFinal(S, /*ReductionKind=*/OMPD_teams);
};
emitCommonOMPTeamsDirective(CGF, S, OMPD_teams, CodeGen);
emitPostUpdateForReductionClause(CGF, S,
[](CodeGenFunction &) { return nullptr; });
}
void CodeGenFunction::EmitOMPTargetTeamsDeviceFunction(
CodeGenModule &CGM, StringRef ParentName,
const OMPTargetTeamsDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitTargetTeamsRegion(CGF, Action, S);
};
llvm::Function *Fn;
llvm::Constant *Addr;
// Emit target region as a standalone region.
CGM.getOpenMPRuntime().emitTargetOutlinedFunction(
S, ParentName, Fn, Addr, /*IsOffloadEntry=*/true, CodeGen);
assert(Fn && Addr && "Target device function emission failed.");
}
void CodeGenFunction::EmitOMPTargetTeamsDirective(
const OMPTargetTeamsDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitTargetTeamsRegion(CGF, Action, S);
};
emitCommonOMPTargetDirective(*this, S, CodeGen);
}
static void
emitTargetTeamsDistributeRegion(CodeGenFunction &CGF, PrePostActionTy &Action,
const OMPTargetTeamsDistributeDirective &S) {
Action.Enter(CGF);
auto &&CodeGenDistribute = [&S](CodeGenFunction &CGF, PrePostActionTy &) {
CGF.EmitOMPDistributeLoop(S, emitOMPLoopBodyWithStopPoint, S.getInc());
};
// Emit teams region as a standalone region.
auto &&CodeGen = [&S, &CodeGenDistribute](CodeGenFunction &CGF,
PrePostActionTy &Action) {
Action.Enter(CGF);
CodeGenFunction::OMPPrivateScope PrivateScope(CGF);
CGF.EmitOMPReductionClauseInit(S, PrivateScope);
(void)PrivateScope.Privatize();
CGF.CGM.getOpenMPRuntime().emitInlinedDirective(CGF, OMPD_distribute,
CodeGenDistribute);
CGF.EmitOMPReductionClauseFinal(S, /*ReductionKind=*/OMPD_teams);
};
emitCommonOMPTeamsDirective(CGF, S, OMPD_distribute, CodeGen);
emitPostUpdateForReductionClause(CGF, S,
[](CodeGenFunction &) { return nullptr; });
}
void CodeGenFunction::EmitOMPTargetTeamsDistributeDeviceFunction(
CodeGenModule &CGM, StringRef ParentName,
const OMPTargetTeamsDistributeDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitTargetTeamsDistributeRegion(CGF, Action, S);
};
llvm::Function *Fn;
llvm::Constant *Addr;
// Emit target region as a standalone region.
CGM.getOpenMPRuntime().emitTargetOutlinedFunction(
S, ParentName, Fn, Addr, /*IsOffloadEntry=*/true, CodeGen);
assert(Fn && Addr && "Target device function emission failed.");
}
void CodeGenFunction::EmitOMPTargetTeamsDistributeDirective(
const OMPTargetTeamsDistributeDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitTargetTeamsDistributeRegion(CGF, Action, S);
};
emitCommonOMPTargetDirective(*this, S, CodeGen);
}
static void emitTargetTeamsDistributeSimdRegion(
CodeGenFunction &CGF, PrePostActionTy &Action,
const OMPTargetTeamsDistributeSimdDirective &S) {
Action.Enter(CGF);
auto &&CodeGenDistribute = [&S](CodeGenFunction &CGF, PrePostActionTy &) {
CGF.EmitOMPDistributeLoop(S, emitOMPLoopBodyWithStopPoint, S.getInc());
};
// Emit teams region as a standalone region.
auto &&CodeGen = [&S, &CodeGenDistribute](CodeGenFunction &CGF,
PrePostActionTy &Action) {
Action.Enter(CGF);
CodeGenFunction::OMPPrivateScope PrivateScope(CGF);
CGF.EmitOMPReductionClauseInit(S, PrivateScope);
(void)PrivateScope.Privatize();
CGF.CGM.getOpenMPRuntime().emitInlinedDirective(CGF, OMPD_distribute,
CodeGenDistribute);
CGF.EmitOMPReductionClauseFinal(S, /*ReductionKind=*/OMPD_teams);
};
emitCommonOMPTeamsDirective(CGF, S, OMPD_distribute_simd, CodeGen);
emitPostUpdateForReductionClause(CGF, S,
[](CodeGenFunction &) { return nullptr; });
}
void CodeGenFunction::EmitOMPTargetTeamsDistributeSimdDeviceFunction(
CodeGenModule &CGM, StringRef ParentName,
const OMPTargetTeamsDistributeSimdDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitTargetTeamsDistributeSimdRegion(CGF, Action, S);
};
llvm::Function *Fn;
llvm::Constant *Addr;
// Emit target region as a standalone region.
CGM.getOpenMPRuntime().emitTargetOutlinedFunction(
S, ParentName, Fn, Addr, /*IsOffloadEntry=*/true, CodeGen);
assert(Fn && Addr && "Target device function emission failed.");
}
void CodeGenFunction::EmitOMPTargetTeamsDistributeSimdDirective(
const OMPTargetTeamsDistributeSimdDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitTargetTeamsDistributeSimdRegion(CGF, Action, S);
};
emitCommonOMPTargetDirective(*this, S, CodeGen);
}
void CodeGenFunction::EmitOMPTeamsDistributeDirective(
const OMPTeamsDistributeDirective &S) {
auto &&CodeGenDistribute = [&S](CodeGenFunction &CGF, PrePostActionTy &) {
CGF.EmitOMPDistributeLoop(S, emitOMPLoopBodyWithStopPoint, S.getInc());
};
// Emit teams region as a standalone region.
auto &&CodeGen = [&S, &CodeGenDistribute](CodeGenFunction &CGF,
PrePostActionTy &Action) {
Action.Enter(CGF);
OMPPrivateScope PrivateScope(CGF);
CGF.EmitOMPReductionClauseInit(S, PrivateScope);
(void)PrivateScope.Privatize();
CGF.CGM.getOpenMPRuntime().emitInlinedDirective(CGF, OMPD_distribute,
CodeGenDistribute);
CGF.EmitOMPReductionClauseFinal(S, /*ReductionKind=*/OMPD_teams);
};
emitCommonOMPTeamsDirective(*this, S, OMPD_distribute, CodeGen);
emitPostUpdateForReductionClause(*this, S,
[](CodeGenFunction &) { return nullptr; });
}
void CodeGenFunction::EmitOMPTeamsDistributeSimdDirective(
const OMPTeamsDistributeSimdDirective &S) {
auto &&CodeGenDistribute = [&S](CodeGenFunction &CGF, PrePostActionTy &) {
CGF.EmitOMPDistributeLoop(S, emitOMPLoopBodyWithStopPoint, S.getInc());
};
// Emit teams region as a standalone region.
auto &&CodeGen = [&S, &CodeGenDistribute](CodeGenFunction &CGF,
PrePostActionTy &Action) {
Action.Enter(CGF);
OMPPrivateScope PrivateScope(CGF);
CGF.EmitOMPReductionClauseInit(S, PrivateScope);
(void)PrivateScope.Privatize();
CGF.CGM.getOpenMPRuntime().emitInlinedDirective(CGF, OMPD_simd,
CodeGenDistribute);
CGF.EmitOMPReductionClauseFinal(S, /*ReductionKind=*/OMPD_teams);
};
emitCommonOMPTeamsDirective(*this, S, OMPD_distribute_simd, CodeGen);
emitPostUpdateForReductionClause(*this, S,
[](CodeGenFunction &) { return nullptr; });
}
void CodeGenFunction::EmitOMPTeamsDistributeParallelForDirective(
const OMPTeamsDistributeParallelForDirective &S) {
auto &&CodeGenDistribute = [&S](CodeGenFunction &CGF, PrePostActionTy &) {
CGF.EmitOMPDistributeLoop(S, emitInnerParallelForWhenCombined,
S.getDistInc());
};
// Emit teams region as a standalone region.
auto &&CodeGen = [&S, &CodeGenDistribute](CodeGenFunction &CGF,
PrePostActionTy &Action) {
Action.Enter(CGF);
OMPPrivateScope PrivateScope(CGF);
CGF.EmitOMPReductionClauseInit(S, PrivateScope);
(void)PrivateScope.Privatize();
CGF.CGM.getOpenMPRuntime().emitInlinedDirective(CGF, OMPD_distribute,
CodeGenDistribute);
CGF.EmitOMPReductionClauseFinal(S, /*ReductionKind=*/OMPD_teams);
};
emitCommonOMPTeamsDirective(*this, S, OMPD_distribute_parallel_for, CodeGen);
emitPostUpdateForReductionClause(*this, S,
[](CodeGenFunction &) { return nullptr; });
}
void CodeGenFunction::EmitOMPTeamsDistributeParallelForSimdDirective(
const OMPTeamsDistributeParallelForSimdDirective &S) {
auto &&CodeGenDistribute = [&S](CodeGenFunction &CGF, PrePostActionTy &) {
CGF.EmitOMPDistributeLoop(S, emitInnerParallelForWhenCombined,
S.getDistInc());
};
// Emit teams region as a standalone region.
auto &&CodeGen = [&S, &CodeGenDistribute](CodeGenFunction &CGF,
PrePostActionTy &Action) {
Action.Enter(CGF);
OMPPrivateScope PrivateScope(CGF);
CGF.EmitOMPReductionClauseInit(S, PrivateScope);
(void)PrivateScope.Privatize();
CGF.CGM.getOpenMPRuntime().emitInlinedDirective(
CGF, OMPD_distribute, CodeGenDistribute, /*HasCancel=*/false);
CGF.EmitOMPReductionClauseFinal(S, /*ReductionKind=*/OMPD_teams);
};
emitCommonOMPTeamsDirective(*this, S, OMPD_distribute_parallel_for_simd,
CodeGen);
emitPostUpdateForReductionClause(*this, S,
[](CodeGenFunction &) { return nullptr; });
}
static void emitTargetTeamsDistributeParallelForRegion(
CodeGenFunction &CGF, const OMPTargetTeamsDistributeParallelForDirective &S,
PrePostActionTy &Action) {
Action.Enter(CGF);
auto &&CodeGenDistribute = [&S](CodeGenFunction &CGF, PrePostActionTy &) {
CGF.EmitOMPDistributeLoop(S, emitInnerParallelForWhenCombined,
S.getDistInc());
};
// Emit teams region as a standalone region.
auto &&CodeGenTeams = [&S, &CodeGenDistribute](CodeGenFunction &CGF,
PrePostActionTy &Action) {
Action.Enter(CGF);
CodeGenFunction::OMPPrivateScope PrivateScope(CGF);
CGF.EmitOMPReductionClauseInit(S, PrivateScope);
(void)PrivateScope.Privatize();
CGF.CGM.getOpenMPRuntime().emitInlinedDirective(
CGF, OMPD_distribute, CodeGenDistribute, /*HasCancel=*/false);
CGF.EmitOMPReductionClauseFinal(S, /*ReductionKind=*/OMPD_teams);
};
emitCommonOMPTeamsDirective(CGF, S, OMPD_distribute_parallel_for,
CodeGenTeams);
emitPostUpdateForReductionClause(CGF, S,
[](CodeGenFunction &) { return nullptr; });
}
void CodeGenFunction::EmitOMPTargetTeamsDistributeParallelForDeviceFunction(
CodeGenModule &CGM, StringRef ParentName,
const OMPTargetTeamsDistributeParallelForDirective &S) {
// Emit SPMD target teams distribute parallel for region as a standalone
// region.
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitTargetTeamsDistributeParallelForRegion(CGF, S, Action);
};
llvm::Function *Fn;
llvm::Constant *Addr;
// Emit target region as a standalone region.
CGM.getOpenMPRuntime().emitTargetOutlinedFunction(
S, ParentName, Fn, Addr, /*IsOffloadEntry=*/true, CodeGen);
assert(Fn && Addr && "Target device function emission failed.");
}
void CodeGenFunction::EmitOMPTargetTeamsDistributeParallelForDirective(
const OMPTargetTeamsDistributeParallelForDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitTargetTeamsDistributeParallelForRegion(CGF, S, Action);
};
emitCommonOMPTargetDirective(*this, S, CodeGen);
}
static void emitTargetTeamsDistributeParallelForSimdRegion(
CodeGenFunction &CGF,
const OMPTargetTeamsDistributeParallelForSimdDirective &S,
PrePostActionTy &Action) {
Action.Enter(CGF);
auto &&CodeGenDistribute = [&S](CodeGenFunction &CGF, PrePostActionTy &) {
CGF.EmitOMPDistributeLoop(S, emitInnerParallelForWhenCombined,
S.getDistInc());
};
// Emit teams region as a standalone region.
auto &&CodeGenTeams = [&S, &CodeGenDistribute](CodeGenFunction &CGF,
PrePostActionTy &Action) {
Action.Enter(CGF);
CodeGenFunction::OMPPrivateScope PrivateScope(CGF);
CGF.EmitOMPReductionClauseInit(S, PrivateScope);
(void)PrivateScope.Privatize();
CGF.CGM.getOpenMPRuntime().emitInlinedDirective(
CGF, OMPD_distribute, CodeGenDistribute, /*HasCancel=*/false);
CGF.EmitOMPReductionClauseFinal(S, /*ReductionKind=*/OMPD_teams);
};
emitCommonOMPTeamsDirective(CGF, S, OMPD_distribute_parallel_for_simd,
CodeGenTeams);
emitPostUpdateForReductionClause(CGF, S,
[](CodeGenFunction &) { return nullptr; });
}
void CodeGenFunction::EmitOMPTargetTeamsDistributeParallelForSimdDeviceFunction(
CodeGenModule &CGM, StringRef ParentName,
const OMPTargetTeamsDistributeParallelForSimdDirective &S) {
// Emit SPMD target teams distribute parallel for simd region as a standalone
// region.
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitTargetTeamsDistributeParallelForSimdRegion(CGF, S, Action);
};
llvm::Function *Fn;
llvm::Constant *Addr;
// Emit target region as a standalone region.
CGM.getOpenMPRuntime().emitTargetOutlinedFunction(
S, ParentName, Fn, Addr, /*IsOffloadEntry=*/true, CodeGen);
assert(Fn && Addr && "Target device function emission failed.");
}
void CodeGenFunction::EmitOMPTargetTeamsDistributeParallelForSimdDirective(
const OMPTargetTeamsDistributeParallelForSimdDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitTargetTeamsDistributeParallelForSimdRegion(CGF, S, Action);
};
emitCommonOMPTargetDirective(*this, S, CodeGen);
}
void CodeGenFunction::EmitOMPCancellationPointDirective(
const OMPCancellationPointDirective &S) {
CGM.getOpenMPRuntime().emitCancellationPointCall(*this, S.getBeginLoc(),
S.getCancelRegion());
}
void CodeGenFunction::EmitOMPCancelDirective(const OMPCancelDirective &S) {
const Expr *IfCond = nullptr;
for (const auto *C : S.getClausesOfKind<OMPIfClause>()) {
if (C->getNameModifier() == OMPD_unknown ||
C->getNameModifier() == OMPD_cancel) {
IfCond = C->getCondition();
break;
}
}
if (CGM.getLangOpts().OpenMPIRBuilder) {
llvm::OpenMPIRBuilder &OMPBuilder = CGM.getOpenMPRuntime().getOMPBuilder();
// TODO: This check is necessary as we only generate `omp parallel` through
// the OpenMPIRBuilder for now.
if (S.getCancelRegion() == OMPD_parallel ||
S.getCancelRegion() == OMPD_sections ||
S.getCancelRegion() == OMPD_section) {
llvm::Value *IfCondition = nullptr;
if (IfCond)
IfCondition = EmitScalarExpr(IfCond,
/*IgnoreResultAssign=*/true);
return Builder.restoreIP(
OMPBuilder.createCancel(Builder, IfCondition, S.getCancelRegion()));
}
}
CGM.getOpenMPRuntime().emitCancelCall(*this, S.getBeginLoc(), IfCond,
S.getCancelRegion());
}
CodeGenFunction::JumpDest
CodeGenFunction::getOMPCancelDestination(OpenMPDirectiveKind Kind) {
if (Kind == OMPD_parallel || Kind == OMPD_task ||
Kind == OMPD_target_parallel || Kind == OMPD_taskloop ||
Kind == OMPD_master_taskloop || Kind == OMPD_parallel_master_taskloop)
return ReturnBlock;
assert(Kind == OMPD_for || Kind == OMPD_section || Kind == OMPD_sections ||
Kind == OMPD_parallel_sections || Kind == OMPD_parallel_for ||
Kind == OMPD_distribute_parallel_for ||
Kind == OMPD_target_parallel_for ||
Kind == OMPD_teams_distribute_parallel_for ||
Kind == OMPD_target_teams_distribute_parallel_for);
return OMPCancelStack.getExitBlock();
}
void CodeGenFunction::EmitOMPUseDevicePtrClause(
const OMPUseDevicePtrClause &C, OMPPrivateScope &PrivateScope,
const llvm::DenseMap<const ValueDecl *, Address> &CaptureDeviceAddrMap) {
auto OrigVarIt = C.varlist_begin();
auto InitIt = C.inits().begin();
for (const Expr *PvtVarIt : C.private_copies()) {
const auto *OrigVD = cast<VarDecl>(cast<DeclRefExpr>(*OrigVarIt)->getDecl());
const auto *InitVD = cast<VarDecl>(cast<DeclRefExpr>(*InitIt)->getDecl());
const auto *PvtVD = cast<VarDecl>(cast<DeclRefExpr>(PvtVarIt)->getDecl());
// In order to identify the right initializer we need to match the
// declaration used by the mapping logic. In some cases we may get
// OMPCapturedExprDecl that refers to the original declaration.
const ValueDecl *MatchingVD = OrigVD;
if (const auto *OED = dyn_cast<OMPCapturedExprDecl>(MatchingVD)) {
// OMPCapturedExprDecl are used to privative fields of the current
// structure.
const auto *ME = cast<MemberExpr>(OED->getInit());
assert(isa<CXXThisExpr>(ME->getBase()) &&
"Base should be the current struct!");
MatchingVD = ME->getMemberDecl();
}
// If we don't have information about the current list item, move on to
// the next one.
auto InitAddrIt = CaptureDeviceAddrMap.find(MatchingVD);
if (InitAddrIt == CaptureDeviceAddrMap.end())
continue;
bool IsRegistered = PrivateScope.addPrivate(OrigVD, [this, OrigVD,
InitAddrIt, InitVD,
PvtVD]() {
// Initialize the temporary initialization variable with the address we
// get from the runtime library. We have to cast the source address
// because it is always a void *. References are materialized in the
// privatization scope, so the initialization here disregards the fact
// the original variable is a reference.
QualType AddrQTy =
getContext().getPointerType(OrigVD->getType().getNonReferenceType());
llvm::Type *AddrTy = ConvertTypeForMem(AddrQTy);
Address InitAddr = Builder.CreateBitCast(InitAddrIt->second, AddrTy);
setAddrOfLocalVar(InitVD, InitAddr);
// Emit private declaration, it will be initialized by the value we
// declaration we just added to the local declarations map.
EmitDecl(*PvtVD);
// The initialization variables reached its purpose in the emission
// of the previous declaration, so we don't need it anymore.
LocalDeclMap.erase(InitVD);
// Return the address of the private variable.
return GetAddrOfLocalVar(PvtVD);
});
assert(IsRegistered && "firstprivate var already registered as private");
// Silence the warning about unused variable.
(void)IsRegistered;
++OrigVarIt;
++InitIt;
}
}
static const VarDecl *getBaseDecl(const Expr *Ref) {
const Expr *Base = Ref->IgnoreParenImpCasts();
while (const auto *OASE = dyn_cast<OMPArraySectionExpr>(Base))
Base = OASE->getBase()->IgnoreParenImpCasts();
while (const auto *ASE = dyn_cast<ArraySubscriptExpr>(Base))
Base = ASE->getBase()->IgnoreParenImpCasts();
return cast<VarDecl>(cast<DeclRefExpr>(Base)->getDecl());
}
void CodeGenFunction::EmitOMPUseDeviceAddrClause(
const OMPUseDeviceAddrClause &C, OMPPrivateScope &PrivateScope,
const llvm::DenseMap<const ValueDecl *, Address> &CaptureDeviceAddrMap) {
llvm::SmallDenseSet<CanonicalDeclPtr<const Decl>, 4> Processed;
for (const Expr *Ref : C.varlists()) {
const VarDecl *OrigVD = getBaseDecl(Ref);
if (!Processed.insert(OrigVD).second)
continue;
// In order to identify the right initializer we need to match the
// declaration used by the mapping logic. In some cases we may get
// OMPCapturedExprDecl that refers to the original declaration.
const ValueDecl *MatchingVD = OrigVD;
if (const auto *OED = dyn_cast<OMPCapturedExprDecl>(MatchingVD)) {
// OMPCapturedExprDecl are used to privative fields of the current
// structure.
const auto *ME = cast<MemberExpr>(OED->getInit());
assert(isa<CXXThisExpr>(ME->getBase()) &&
"Base should be the current struct!");
MatchingVD = ME->getMemberDecl();
}
// If we don't have information about the current list item, move on to
// the next one.
auto InitAddrIt = CaptureDeviceAddrMap.find(MatchingVD);
if (InitAddrIt == CaptureDeviceAddrMap.end())
continue;
Address PrivAddr = InitAddrIt->getSecond();
// For declrefs and variable length array need to load the pointer for
// correct mapping, since the pointer to the data was passed to the runtime.
if (isa<DeclRefExpr>(Ref->IgnoreParenImpCasts()) ||
MatchingVD->getType()->isArrayType())
PrivAddr =
EmitLoadOfPointer(PrivAddr, getContext()
.getPointerType(OrigVD->getType())
->castAs<PointerType>());
llvm::Type *RealTy =
ConvertTypeForMem(OrigVD->getType().getNonReferenceType())
->getPointerTo();
PrivAddr = Builder.CreatePointerBitCastOrAddrSpaceCast(PrivAddr, RealTy);
(void)PrivateScope.addPrivate(OrigVD, [PrivAddr]() { return PrivAddr; });
}
}
// Generate the instructions for '#pragma omp target data' directive.
void CodeGenFunction::EmitOMPTargetDataDirective(
const OMPTargetDataDirective &S) {
CGOpenMPRuntime::TargetDataInfo Info(/*RequiresDevicePointerInfo=*/true,
/*SeparateBeginEndCalls=*/true);
// Create a pre/post action to signal the privatization of the device pointer.
// This action can be replaced by the OpenMP runtime code generation to
// deactivate privatization.
bool PrivatizeDevicePointers = false;
class DevicePointerPrivActionTy : public PrePostActionTy {
bool &PrivatizeDevicePointers;
public:
explicit DevicePointerPrivActionTy(bool &PrivatizeDevicePointers)
: PrePostActionTy(), PrivatizeDevicePointers(PrivatizeDevicePointers) {}
void Enter(CodeGenFunction &CGF) override {
PrivatizeDevicePointers = true;
}
};
DevicePointerPrivActionTy PrivAction(PrivatizeDevicePointers);
auto &&CodeGen = [&S, &Info, &PrivatizeDevicePointers](
CodeGenFunction &CGF, PrePostActionTy &Action) {
auto &&InnermostCodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &) {
CGF.EmitStmt(S.getInnermostCapturedStmt()->getCapturedStmt());
};
// Codegen that selects whether to generate the privatization code or not.
auto &&PrivCodeGen = [&S, &Info, &PrivatizeDevicePointers,
&InnermostCodeGen](CodeGenFunction &CGF,
PrePostActionTy &Action) {
RegionCodeGenTy RCG(InnermostCodeGen);
PrivatizeDevicePointers = false;
// Call the pre-action to change the status of PrivatizeDevicePointers if
// needed.
Action.Enter(CGF);
if (PrivatizeDevicePointers) {
OMPPrivateScope PrivateScope(CGF);
// Emit all instances of the use_device_ptr clause.
for (const auto *C : S.getClausesOfKind<OMPUseDevicePtrClause>())
CGF.EmitOMPUseDevicePtrClause(*C, PrivateScope,
Info.CaptureDeviceAddrMap);
for (const auto *C : S.getClausesOfKind<OMPUseDeviceAddrClause>())
CGF.EmitOMPUseDeviceAddrClause(*C, PrivateScope,
Info.CaptureDeviceAddrMap);
(void)PrivateScope.Privatize();
RCG(CGF);
} else {
OMPLexicalScope Scope(CGF, S, OMPD_unknown);
RCG(CGF);
}
};
// Forward the provided action to the privatization codegen.
RegionCodeGenTy PrivRCG(PrivCodeGen);
PrivRCG.setAction(Action);
// Notwithstanding the body of the region is emitted as inlined directive,
// we don't use an inline scope as changes in the references inside the
// region are expected to be visible outside, so we do not privative them.
OMPLexicalScope Scope(CGF, S);
CGF.CGM.getOpenMPRuntime().emitInlinedDirective(CGF, OMPD_target_data,
PrivRCG);
};
RegionCodeGenTy RCG(CodeGen);
// If we don't have target devices, don't bother emitting the data mapping
// code.
if (CGM.getLangOpts().OMPTargetTriples.empty()) {
RCG(*this);
return;
}
// Check if we have any if clause associated with the directive.
const Expr *IfCond = nullptr;
if (const auto *C = S.getSingleClause<OMPIfClause>())
IfCond = C->getCondition();
// Check if we have any device clause associated with the directive.
const Expr *Device = nullptr;
if (const auto *C = S.getSingleClause<OMPDeviceClause>())
Device = C->getDevice();
// Set the action to signal privatization of device pointers.
RCG.setAction(PrivAction);
// Emit region code.
CGM.getOpenMPRuntime().emitTargetDataCalls(*this, S, IfCond, Device, RCG,
Info);
}
void CodeGenFunction::EmitOMPTargetEnterDataDirective(
const OMPTargetEnterDataDirective &S) {
// If we don't have target devices, don't bother emitting the data mapping
// code.
if (CGM.getLangOpts().OMPTargetTriples.empty())
return;
// Check if we have any if clause associated with the directive.
const Expr *IfCond = nullptr;
if (const auto *C = S.getSingleClause<OMPIfClause>())
IfCond = C->getCondition();
// Check if we have any device clause associated with the directive.
const Expr *Device = nullptr;
if (const auto *C = S.getSingleClause<OMPDeviceClause>())
Device = C->getDevice();
OMPLexicalScope Scope(*this, S, OMPD_task);
CGM.getOpenMPRuntime().emitTargetDataStandAloneCall(*this, S, IfCond, Device);
}
void CodeGenFunction::EmitOMPTargetExitDataDirective(
const OMPTargetExitDataDirective &S) {
// If we don't have target devices, don't bother emitting the data mapping
// code.
if (CGM.getLangOpts().OMPTargetTriples.empty())
return;
// Check if we have any if clause associated with the directive.
const Expr *IfCond = nullptr;
if (const auto *C = S.getSingleClause<OMPIfClause>())
IfCond = C->getCondition();
// Check if we have any device clause associated with the directive.
const Expr *Device = nullptr;
if (const auto *C = S.getSingleClause<OMPDeviceClause>())
Device = C->getDevice();
OMPLexicalScope Scope(*this, S, OMPD_task);
CGM.getOpenMPRuntime().emitTargetDataStandAloneCall(*this, S, IfCond, Device);
}
static void emitTargetParallelRegion(CodeGenFunction &CGF,
const OMPTargetParallelDirective &S,
PrePostActionTy &Action) {
// Get the captured statement associated with the 'parallel' region.
const CapturedStmt *CS = S.getCapturedStmt(OMPD_parallel);
Action.Enter(CGF);
auto &&CodeGen = [&S, CS](CodeGenFunction &CGF, PrePostActionTy &Action) {
Action.Enter(CGF);
CodeGenFunction::OMPPrivateScope PrivateScope(CGF);
(void)CGF.EmitOMPFirstprivateClause(S, PrivateScope);
CGF.EmitOMPPrivateClause(S, PrivateScope);
CGF.EmitOMPReductionClauseInit(S, PrivateScope);
(void)PrivateScope.Privatize();
if (isOpenMPTargetExecutionDirective(S.getDirectiveKind()))
CGF.CGM.getOpenMPRuntime().adjustTargetSpecificDataForLambdas(CGF, S);
// TODO: Add support for clauses.
CGF.EmitStmt(CS->getCapturedStmt());
CGF.EmitOMPReductionClauseFinal(S, /*ReductionKind=*/OMPD_parallel);
};
emitCommonOMPParallelDirective(CGF, S, OMPD_parallel, CodeGen,
emitEmptyBoundParameters);
emitPostUpdateForReductionClause(CGF, S,
[](CodeGenFunction &) { return nullptr; });
}
void CodeGenFunction::EmitOMPTargetParallelDeviceFunction(
CodeGenModule &CGM, StringRef ParentName,
const OMPTargetParallelDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitTargetParallelRegion(CGF, S, Action);
};
llvm::Function *Fn;
llvm::Constant *Addr;
// Emit target region as a standalone region.
CGM.getOpenMPRuntime().emitTargetOutlinedFunction(
S, ParentName, Fn, Addr, /*IsOffloadEntry=*/true, CodeGen);
assert(Fn && Addr && "Target device function emission failed.");
}
void CodeGenFunction::EmitOMPTargetParallelDirective(
const OMPTargetParallelDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitTargetParallelRegion(CGF, S, Action);
};
emitCommonOMPTargetDirective(*this, S, CodeGen);
}
static void emitTargetParallelForRegion(CodeGenFunction &CGF,
const OMPTargetParallelForDirective &S,
PrePostActionTy &Action) {
Action.Enter(CGF);
// Emit directive as a combined directive that consists of two implicit
// directives: 'parallel' with 'for' directive.
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
Action.Enter(CGF);
CodeGenFunction::OMPCancelStackRAII CancelRegion(
CGF, OMPD_target_parallel_for, S.hasCancel());
CGF.EmitOMPWorksharingLoop(S, S.getEnsureUpperBound(), emitForLoopBounds,
emitDispatchForLoopBounds);
};
emitCommonOMPParallelDirective(CGF, S, OMPD_for, CodeGen,
emitEmptyBoundParameters);
}
void CodeGenFunction::EmitOMPTargetParallelForDeviceFunction(
CodeGenModule &CGM, StringRef ParentName,
const OMPTargetParallelForDirective &S) {
// Emit SPMD target parallel for region as a standalone region.
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitTargetParallelForRegion(CGF, S, Action);
};
llvm::Function *Fn;
llvm::Constant *Addr;
// Emit target region as a standalone region.
CGM.getOpenMPRuntime().emitTargetOutlinedFunction(
S, ParentName, Fn, Addr, /*IsOffloadEntry=*/true, CodeGen);
assert(Fn && Addr && "Target device function emission failed.");
}
void CodeGenFunction::EmitOMPTargetParallelForDirective(
const OMPTargetParallelForDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitTargetParallelForRegion(CGF, S, Action);
};
emitCommonOMPTargetDirective(*this, S, CodeGen);
}
static void
emitTargetParallelForSimdRegion(CodeGenFunction &CGF,
const OMPTargetParallelForSimdDirective &S,
PrePostActionTy &Action) {
Action.Enter(CGF);
// Emit directive as a combined directive that consists of two implicit
// directives: 'parallel' with 'for' directive.
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
Action.Enter(CGF);
CGF.EmitOMPWorksharingLoop(S, S.getEnsureUpperBound(), emitForLoopBounds,
emitDispatchForLoopBounds);
};
emitCommonOMPParallelDirective(CGF, S, OMPD_simd, CodeGen,
emitEmptyBoundParameters);
}
void CodeGenFunction::EmitOMPTargetParallelForSimdDeviceFunction(
CodeGenModule &CGM, StringRef ParentName,
const OMPTargetParallelForSimdDirective &S) {
// Emit SPMD target parallel for region as a standalone region.
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitTargetParallelForSimdRegion(CGF, S, Action);
};
llvm::Function *Fn;
llvm::Constant *Addr;
// Emit target region as a standalone region.
CGM.getOpenMPRuntime().emitTargetOutlinedFunction(
S, ParentName, Fn, Addr, /*IsOffloadEntry=*/true, CodeGen);
assert(Fn && Addr && "Target device function emission failed.");
}
void CodeGenFunction::EmitOMPTargetParallelForSimdDirective(
const OMPTargetParallelForSimdDirective &S) {
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitTargetParallelForSimdRegion(CGF, S, Action);
};
emitCommonOMPTargetDirective(*this, S, CodeGen);
}
/// Emit a helper variable and return corresponding lvalue.
static void mapParam(CodeGenFunction &CGF, const DeclRefExpr *Helper,
const ImplicitParamDecl *PVD,
CodeGenFunction::OMPPrivateScope &Privates) {
const auto *VDecl = cast<VarDecl>(Helper->getDecl());
Privates.addPrivate(VDecl,
[&CGF, PVD]() { return CGF.GetAddrOfLocalVar(PVD); });
}
void CodeGenFunction::EmitOMPTaskLoopBasedDirective(const OMPLoopDirective &S) {
assert(isOpenMPTaskLoopDirective(S.getDirectiveKind()));
// Emit outlined function for task construct.
const CapturedStmt *CS = S.getCapturedStmt(OMPD_taskloop);
Address CapturedStruct = Address::invalid();
{
OMPLexicalScope Scope(*this, S, OMPD_taskloop, /*EmitPreInitStmt=*/false);
CapturedStruct = GenerateCapturedStmtArgument(*CS);
}
QualType SharedsTy = getContext().getRecordType(CS->getCapturedRecordDecl());
const Expr *IfCond = nullptr;
for (const auto *C : S.getClausesOfKind<OMPIfClause>()) {
if (C->getNameModifier() == OMPD_unknown ||
C->getNameModifier() == OMPD_taskloop) {
IfCond = C->getCondition();
break;
}
}
OMPTaskDataTy Data;
// Check if taskloop must be emitted without taskgroup.
Data.Nogroup = S.getSingleClause<OMPNogroupClause>();
// TODO: Check if we should emit tied or untied task.
Data.Tied = true;
// Set scheduling for taskloop
if (const auto* Clause = S.getSingleClause<OMPGrainsizeClause>()) {
// grainsize clause
Data.Schedule.setInt(/*IntVal=*/false);
Data.Schedule.setPointer(EmitScalarExpr(Clause->getGrainsize()));
} else if (const auto* Clause = S.getSingleClause<OMPNumTasksClause>()) {
// num_tasks clause
Data.Schedule.setInt(/*IntVal=*/true);
Data.Schedule.setPointer(EmitScalarExpr(Clause->getNumTasks()));
}
auto &&BodyGen = [CS, &S](CodeGenFunction &CGF, PrePostActionTy &) {
// if (PreCond) {
// for (IV in 0..LastIteration) BODY;
// <Final counter/linear vars updates>;
// }
//
// Emit: if (PreCond) - begin.
// If the condition constant folds and can be elided, avoid emitting the
// whole loop.
bool CondConstant;
llvm::BasicBlock *ContBlock = nullptr;
OMPLoopScope PreInitScope(CGF, S);
if (CGF.ConstantFoldsToSimpleInteger(S.getPreCond(), CondConstant)) {
if (!CondConstant)
return;
} else {
llvm::BasicBlock *ThenBlock = CGF.createBasicBlock("taskloop.if.then");
ContBlock = CGF.createBasicBlock("taskloop.if.end");
emitPreCond(CGF, S, S.getPreCond(), ThenBlock, ContBlock,
CGF.getProfileCount(&S));
CGF.EmitBlock(ThenBlock);
CGF.incrementProfileCounter(&S);
}
(void)CGF.EmitOMPLinearClauseInit(S);
OMPPrivateScope LoopScope(CGF);
// Emit helper vars inits.
enum { LowerBound = 5, UpperBound, Stride, LastIter };
auto *I = CS->getCapturedDecl()->param_begin();
auto *LBP = std::next(I, LowerBound);
auto *UBP = std::next(I, UpperBound);
auto *STP = std::next(I, Stride);
auto *LIP = std::next(I, LastIter);
mapParam(CGF, cast<DeclRefExpr>(S.getLowerBoundVariable()), *LBP,
LoopScope);
mapParam(CGF, cast<DeclRefExpr>(S.getUpperBoundVariable()), *UBP,
LoopScope);
mapParam(CGF, cast<DeclRefExpr>(S.getStrideVariable()), *STP, LoopScope);
mapParam(CGF, cast<DeclRefExpr>(S.getIsLastIterVariable()), *LIP,
LoopScope);
CGF.EmitOMPPrivateLoopCounters(S, LoopScope);
CGF.EmitOMPLinearClause(S, LoopScope);
bool HasLastprivateClause = CGF.EmitOMPLastprivateClauseInit(S, LoopScope);
(void)LoopScope.Privatize();
// Emit the loop iteration variable.
const Expr *IVExpr = S.getIterationVariable();
const auto *IVDecl = cast<VarDecl>(cast<DeclRefExpr>(IVExpr)->getDecl());
CGF.EmitVarDecl(*IVDecl);
CGF.EmitIgnoredExpr(S.getInit());
// Emit the iterations count variable.
// If it is not a variable, Sema decided to calculate iterations count on
// each iteration (e.g., it is foldable into a constant).
if (const auto *LIExpr = dyn_cast<DeclRefExpr>(S.getLastIteration())) {
CGF.EmitVarDecl(*cast<VarDecl>(LIExpr->getDecl()));
// Emit calculation of the iterations count.
CGF.EmitIgnoredExpr(S.getCalcLastIteration());
}
{
OMPLexicalScope Scope(CGF, S, OMPD_taskloop, /*EmitPreInitStmt=*/false);
emitCommonSimdLoop(
CGF, S,
[&S](CodeGenFunction &CGF, PrePostActionTy &) {
if (isOpenMPSimdDirective(S.getDirectiveKind()))
CGF.EmitOMPSimdInit(S);
},
[&S, &LoopScope](CodeGenFunction &CGF, PrePostActionTy &) {
CGF.EmitOMPInnerLoop(
S, LoopScope.requiresCleanups(), S.getCond(), S.getInc(),
[&S](CodeGenFunction &CGF) {
emitOMPLoopBodyWithStopPoint(CGF, S,
CodeGenFunction::JumpDest());
},
[](CodeGenFunction &) {});
});
}
// Emit: if (PreCond) - end.
if (ContBlock) {
CGF.EmitBranch(ContBlock);
CGF.EmitBlock(ContBlock, true);
}
// Emit final copy of the lastprivate variables if IsLastIter != 0.
if (HasLastprivateClause) {
CGF.EmitOMPLastprivateClauseFinal(
S, isOpenMPSimdDirective(S.getDirectiveKind()),
CGF.Builder.CreateIsNotNull(CGF.EmitLoadOfScalar(
CGF.GetAddrOfLocalVar(*LIP), /*Volatile=*/false,
(*LIP)->getType(), S.getBeginLoc())));
}
CGF.EmitOMPLinearClauseFinal(S, [LIP, &S](CodeGenFunction &CGF) {
return CGF.Builder.CreateIsNotNull(
CGF.EmitLoadOfScalar(CGF.GetAddrOfLocalVar(*LIP), /*Volatile=*/false,
(*LIP)->getType(), S.getBeginLoc()));
});
};
auto &&TaskGen = [&S, SharedsTy, CapturedStruct,
IfCond](CodeGenFunction &CGF, llvm::Function *OutlinedFn,
const OMPTaskDataTy &Data) {
auto &&CodeGen = [&S, OutlinedFn, SharedsTy, CapturedStruct, IfCond,
&Data](CodeGenFunction &CGF, PrePostActionTy &) {
OMPLoopScope PreInitScope(CGF, S);
CGF.CGM.getOpenMPRuntime().emitTaskLoopCall(CGF, S.getBeginLoc(), S,
OutlinedFn, SharedsTy,
CapturedStruct, IfCond, Data);
};
CGF.CGM.getOpenMPRuntime().emitInlinedDirective(CGF, OMPD_taskloop,
CodeGen);
};
if (Data.Nogroup) {
EmitOMPTaskBasedDirective(S, OMPD_taskloop, BodyGen, TaskGen, Data);
} else {
CGM.getOpenMPRuntime().emitTaskgroupRegion(
*this,
[&S, &BodyGen, &TaskGen, &Data](CodeGenFunction &CGF,
PrePostActionTy &Action) {
Action.Enter(CGF);
CGF.EmitOMPTaskBasedDirective(S, OMPD_taskloop, BodyGen, TaskGen,
Data);
},
S.getBeginLoc());
}
}
void CodeGenFunction::EmitOMPTaskLoopDirective(const OMPTaskLoopDirective &S) {
auto LPCRegion =
CGOpenMPRuntime::LastprivateConditionalRAII::disable(*this, S);
EmitOMPTaskLoopBasedDirective(S);
}
void CodeGenFunction::EmitOMPTaskLoopSimdDirective(
const OMPTaskLoopSimdDirective &S) {
auto LPCRegion =
CGOpenMPRuntime::LastprivateConditionalRAII::disable(*this, S);
OMPLexicalScope Scope(*this, S);
EmitOMPTaskLoopBasedDirective(S);
}
void CodeGenFunction::EmitOMPMasterTaskLoopDirective(
const OMPMasterTaskLoopDirective &S) {
auto &&CodeGen = [this, &S](CodeGenFunction &CGF, PrePostActionTy &Action) {
Action.Enter(CGF);
EmitOMPTaskLoopBasedDirective(S);
};
auto LPCRegion =
CGOpenMPRuntime::LastprivateConditionalRAII::disable(*this, S);
OMPLexicalScope Scope(*this, S, llvm::None, /*EmitPreInitStmt=*/false);
CGM.getOpenMPRuntime().emitMasterRegion(*this, CodeGen, S.getBeginLoc());
}
void CodeGenFunction::EmitOMPMasterTaskLoopSimdDirective(
const OMPMasterTaskLoopSimdDirective &S) {
auto &&CodeGen = [this, &S](CodeGenFunction &CGF, PrePostActionTy &Action) {
Action.Enter(CGF);
EmitOMPTaskLoopBasedDirective(S);
};
auto LPCRegion =
CGOpenMPRuntime::LastprivateConditionalRAII::disable(*this, S);
OMPLexicalScope Scope(*this, S);
CGM.getOpenMPRuntime().emitMasterRegion(*this, CodeGen, S.getBeginLoc());
}
void CodeGenFunction::EmitOMPParallelMasterTaskLoopDirective(
const OMPParallelMasterTaskLoopDirective &S) {
auto &&CodeGen = [this, &S](CodeGenFunction &CGF, PrePostActionTy &Action) {
auto &&TaskLoopCodeGen = [&S](CodeGenFunction &CGF,
PrePostActionTy &Action) {
Action.Enter(CGF);
CGF.EmitOMPTaskLoopBasedDirective(S);
};
OMPLexicalScope Scope(CGF, S, OMPD_parallel, /*EmitPreInitStmt=*/false);
CGM.getOpenMPRuntime().emitMasterRegion(CGF, TaskLoopCodeGen,
S.getBeginLoc());
};
auto LPCRegion =
CGOpenMPRuntime::LastprivateConditionalRAII::disable(*this, S);
emitCommonOMPParallelDirective(*this, S, OMPD_master_taskloop, CodeGen,
emitEmptyBoundParameters);
}
void CodeGenFunction::EmitOMPParallelMasterTaskLoopSimdDirective(
const OMPParallelMasterTaskLoopSimdDirective &S) {
auto &&CodeGen = [this, &S](CodeGenFunction &CGF, PrePostActionTy &Action) {
auto &&TaskLoopCodeGen = [&S](CodeGenFunction &CGF,
PrePostActionTy &Action) {
Action.Enter(CGF);
CGF.EmitOMPTaskLoopBasedDirective(S);
};
OMPLexicalScope Scope(CGF, S, OMPD_parallel, /*EmitPreInitStmt=*/false);
CGM.getOpenMPRuntime().emitMasterRegion(CGF, TaskLoopCodeGen,
S.getBeginLoc());
};
auto LPCRegion =
CGOpenMPRuntime::LastprivateConditionalRAII::disable(*this, S);
emitCommonOMPParallelDirective(*this, S, OMPD_master_taskloop_simd, CodeGen,
emitEmptyBoundParameters);
}
// Generate the instructions for '#pragma omp target update' directive.
void CodeGenFunction::EmitOMPTargetUpdateDirective(
const OMPTargetUpdateDirective &S) {
// If we don't have target devices, don't bother emitting the data mapping
// code.
if (CGM.getLangOpts().OMPTargetTriples.empty())
return;
// Check if we have any if clause associated with the directive.
const Expr *IfCond = nullptr;
if (const auto *C = S.getSingleClause<OMPIfClause>())
IfCond = C->getCondition();
// Check if we have any device clause associated with the directive.
const Expr *Device = nullptr;
if (const auto *C = S.getSingleClause<OMPDeviceClause>())
Device = C->getDevice();
OMPLexicalScope Scope(*this, S, OMPD_task);
CGM.getOpenMPRuntime().emitTargetDataStandAloneCall(*this, S, IfCond, Device);
}
void CodeGenFunction::EmitSimpleOMPExecutableDirective(
const OMPExecutableDirective &D) {
if (const auto *SD = dyn_cast<OMPScanDirective>(&D)) {
EmitOMPScanDirective(*SD);
return;
}
if (!D.hasAssociatedStmt() || !D.getAssociatedStmt())
return;
auto &&CodeGen = [&D](CodeGenFunction &CGF, PrePostActionTy &Action) {
OMPPrivateScope GlobalsScope(CGF);
if (isOpenMPTaskingDirective(D.getDirectiveKind())) {
// Capture global firstprivates to avoid crash.
for (const auto *C : D.getClausesOfKind<OMPFirstprivateClause>()) {
for (const Expr *Ref : C->varlists()) {
const auto *DRE = cast<DeclRefExpr>(Ref->IgnoreParenImpCasts());
if (!DRE)
continue;
const auto *VD = dyn_cast<VarDecl>(DRE->getDecl());
if (!VD || VD->hasLocalStorage())
continue;
if (!CGF.LocalDeclMap.count(VD)) {
LValue GlobLVal = CGF.EmitLValue(Ref);
GlobalsScope.addPrivate(
VD, [&GlobLVal, &CGF]() { return GlobLVal.getAddress(CGF); });
}
}
}
}
if (isOpenMPSimdDirective(D.getDirectiveKind())) {
(void)GlobalsScope.Privatize();
ParentLoopDirectiveForScanRegion ScanRegion(CGF, D);
emitOMPSimdRegion(CGF, cast<OMPLoopDirective>(D), Action);
} else {
if (const auto *LD = dyn_cast<OMPLoopDirective>(&D)) {
for (const Expr *E : LD->counters()) {
const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl());
if (!VD->hasLocalStorage() && !CGF.LocalDeclMap.count(VD)) {
LValue GlobLVal = CGF.EmitLValue(E);
GlobalsScope.addPrivate(
VD, [&GlobLVal, &CGF]() { return GlobLVal.getAddress(CGF); });
}
if (isa<OMPCapturedExprDecl>(VD)) {
// Emit only those that were not explicitly referenced in clauses.
if (!CGF.LocalDeclMap.count(VD))
CGF.EmitVarDecl(*VD);
}
}
for (const auto *C : D.getClausesOfKind<OMPOrderedClause>()) {
if (!C->getNumForLoops())
continue;
for (unsigned I = LD->getLoopsNumber(),
E = C->getLoopNumIterations().size();
I < E; ++I) {
if (const auto *VD = dyn_cast<OMPCapturedExprDecl>(
cast<DeclRefExpr>(C->getLoopCounter(I))->getDecl())) {
// Emit only those that were not explicitly referenced in clauses.
if (!CGF.LocalDeclMap.count(VD))
CGF.EmitVarDecl(*VD);
}
}
}
}
(void)GlobalsScope.Privatize();
CGF.EmitStmt(D.getInnermostCapturedStmt()->getCapturedStmt());
}
};
if (D.getDirectiveKind() == OMPD_atomic ||
D.getDirectiveKind() == OMPD_critical ||
D.getDirectiveKind() == OMPD_section ||
D.getDirectiveKind() == OMPD_master ||
D.getDirectiveKind() == OMPD_masked) {
EmitStmt(D.getAssociatedStmt());
} else {
auto LPCRegion =
CGOpenMPRuntime::LastprivateConditionalRAII::disable(*this, D);
OMPSimdLexicalScope Scope(*this, D);
CGM.getOpenMPRuntime().emitInlinedDirective(
*this,
isOpenMPSimdDirective(D.getDirectiveKind()) ? OMPD_simd
: D.getDirectiveKind(),
CodeGen);
}
// Check for outer lastprivate conditional update.
checkForLastprivateConditionalUpdate(*this, D);
}
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