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llvm-project/llvm/lib/IR/DIBuilder.cpp

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//===--- DIBuilder.cpp - Debug Information Builder ------------------------===//
//
// 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 file implements the DIBuilder.
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/DIBuilder.h"
#include "llvm/IR/IRBuilder.h"
#include "LLVMContextImpl.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/BinaryFormat/Dwarf.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/Debug.h"
using namespace llvm;
using namespace llvm::dwarf;
cl::opt<bool>
UseDbgAddr("use-dbg-addr",
llvm::cl::desc("Use llvm.dbg.addr for all local variables"),
cl::init(false), cl::Hidden);
DIBuilder::DIBuilder(Module &m, bool AllowUnresolvedNodes, DICompileUnit *CU)
: M(m), VMContext(M.getContext()), CUNode(CU),
DeclareFn(nullptr), ValueFn(nullptr), LabelFn(nullptr),
AllowUnresolvedNodes(AllowUnresolvedNodes) {}
void DIBuilder::trackIfUnresolved(MDNode *N) {
if (!N)
return;
if (N->isResolved())
return;
assert(AllowUnresolvedNodes && "Cannot handle unresolved nodes");
UnresolvedNodes.emplace_back(N);
}
void DIBuilder::finalizeSubprogram(DISubprogram *SP) {
MDTuple *Temp = SP->getRetainedNodes().get();
if (!Temp || !Temp->isTemporary())
return;
SmallVector<Metadata *, 16> RetainedNodes;
auto PV = PreservedVariables.find(SP);
if (PV != PreservedVariables.end())
RetainedNodes.append(PV->second.begin(), PV->second.end());
auto PL = PreservedLabels.find(SP);
if (PL != PreservedLabels.end())
RetainedNodes.append(PL->second.begin(), PL->second.end());
DINodeArray Node = getOrCreateArray(RetainedNodes);
TempMDTuple(Temp)->replaceAllUsesWith(Node.get());
}
void DIBuilder::finalize() {
if (!CUNode) {
assert(!AllowUnresolvedNodes &&
"creating type nodes without a CU is not supported");
return;
}
CUNode->replaceEnumTypes(MDTuple::get(VMContext, AllEnumTypes));
SmallVector<Metadata *, 16> RetainValues;
// Declarations and definitions of the same type may be retained. Some
// clients RAUW these pairs, leaving duplicates in the retained types
// list. Use a set to remove the duplicates while we transform the
// TrackingVHs back into Values.
SmallPtrSet<Metadata *, 16> RetainSet;
for (unsigned I = 0, E = AllRetainTypes.size(); I < E; I++)
if (RetainSet.insert(AllRetainTypes[I]).second)
RetainValues.push_back(AllRetainTypes[I]);
if (!RetainValues.empty())
CUNode->replaceRetainedTypes(MDTuple::get(VMContext, RetainValues));
DISubprogramArray SPs = MDTuple::get(VMContext, AllSubprograms);
for (auto *SP : SPs)
finalizeSubprogram(SP);
for (auto *N : RetainValues)
if (auto *SP = dyn_cast<DISubprogram>(N))
finalizeSubprogram(SP);
if (!AllGVs.empty())
CUNode->replaceGlobalVariables(MDTuple::get(VMContext, AllGVs));
if (!AllImportedModules.empty())
CUNode->replaceImportedEntities(MDTuple::get(
VMContext, SmallVector<Metadata *, 16>(AllImportedModules.begin(),
AllImportedModules.end())));
for (const auto &I : AllMacrosPerParent) {
// DIMacroNode's with nullptr parent are DICompileUnit direct children.
if (!I.first) {
CUNode->replaceMacros(MDTuple::get(VMContext, I.second.getArrayRef()));
continue;
}
// Otherwise, it must be a temporary DIMacroFile that need to be resolved.
auto *TMF = cast<DIMacroFile>(I.first);
auto *MF = DIMacroFile::get(VMContext, dwarf::DW_MACINFO_start_file,
TMF->getLine(), TMF->getFile(),
getOrCreateMacroArray(I.second.getArrayRef()));
replaceTemporary(llvm::TempDIMacroNode(TMF), MF);
}
// Now that all temp nodes have been replaced or deleted, resolve remaining
// cycles.
for (const auto &N : UnresolvedNodes)
if (N && !N->isResolved())
N->resolveCycles();
UnresolvedNodes.clear();
// Can't handle unresolved nodes anymore.
AllowUnresolvedNodes = false;
}
/// If N is compile unit return NULL otherwise return N.
static DIScope *getNonCompileUnitScope(DIScope *N) {
if (!N || isa<DICompileUnit>(N))
return nullptr;
return cast<DIScope>(N);
}
DICompileUnit *DIBuilder::createCompileUnit(
unsigned Lang, DIFile *File, StringRef Producer, bool isOptimized,
StringRef Flags, unsigned RunTimeVer, StringRef SplitName,
DICompileUnit::DebugEmissionKind Kind, uint64_t DWOId,
bool SplitDebugInlining, bool DebugInfoForProfiling,
DICompileUnit::DebugNameTableKind NameTableKind, bool RangesBaseAddress) {
assert(((Lang <= dwarf::DW_LANG_Fortran08 && Lang >= dwarf::DW_LANG_C89) ||
(Lang <= dwarf::DW_LANG_hi_user && Lang >= dwarf::DW_LANG_lo_user)) &&
"Invalid Language tag");
assert(!CUNode && "Can only make one compile unit per DIBuilder instance");
CUNode = DICompileUnit::getDistinct(
VMContext, Lang, File, Producer, isOptimized, Flags, RunTimeVer,
SplitName, Kind, nullptr, nullptr, nullptr, nullptr, nullptr, DWOId,
SplitDebugInlining, DebugInfoForProfiling, NameTableKind,
RangesBaseAddress);
// Create a named metadata so that it is easier to find cu in a module.
NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.cu");
NMD->addOperand(CUNode);
trackIfUnresolved(CUNode);
return CUNode;
}
static DIImportedEntity *
createImportedModule(LLVMContext &C, dwarf::Tag Tag, DIScope *Context,
Metadata *NS, DIFile *File, unsigned Line, StringRef Name,
SmallVectorImpl<TrackingMDNodeRef> &AllImportedModules) {
if (Line)
assert(File && "Source location has line number but no file");
unsigned EntitiesCount = C.pImpl->DIImportedEntitys.size();
auto *M = DIImportedEntity::get(C, Tag, Context, cast_or_null<DINode>(NS),
File, Line, Name);
if (EntitiesCount < C.pImpl->DIImportedEntitys.size())
// A new Imported Entity was just added to the context.
// Add it to the Imported Modules list.
AllImportedModules.emplace_back(M);
return M;
}
DIImportedEntity *DIBuilder::createImportedModule(DIScope *Context,
DINamespace *NS, DIFile *File,
unsigned Line) {
return ::createImportedModule(VMContext, dwarf::DW_TAG_imported_module,
Context, NS, File, Line, StringRef(),
AllImportedModules);
}
DIImportedEntity *DIBuilder::createImportedModule(DIScope *Context,
DIImportedEntity *NS,
DIFile *File, unsigned Line) {
return ::createImportedModule(VMContext, dwarf::DW_TAG_imported_module,
Context, NS, File, Line, StringRef(),
AllImportedModules);
}
DIImportedEntity *DIBuilder::createImportedModule(DIScope *Context, DIModule *M,
DIFile *File, unsigned Line) {
return ::createImportedModule(VMContext, dwarf::DW_TAG_imported_module,
Context, M, File, Line, StringRef(),
AllImportedModules);
}
DIImportedEntity *DIBuilder::createImportedDeclaration(DIScope *Context,
DINode *Decl,
DIFile *File,
unsigned Line,
StringRef Name) {
// Make sure to use the unique identifier based metadata reference for
// types that have one.
return ::createImportedModule(VMContext, dwarf::DW_TAG_imported_declaration,
Context, Decl, File, Line, Name,
AllImportedModules);
}
DIFile *DIBuilder::createFile(StringRef Filename, StringRef Directory,
Optional<DIFile::ChecksumInfo<StringRef>> CS,
Optional<StringRef> Source) {
return DIFile::get(VMContext, Filename, Directory, CS, Source);
}
DIMacro *DIBuilder::createMacro(DIMacroFile *Parent, unsigned LineNumber,
unsigned MacroType, StringRef Name,
StringRef Value) {
assert(!Name.empty() && "Unable to create macro without name");
assert((MacroType == dwarf::DW_MACINFO_undef ||
MacroType == dwarf::DW_MACINFO_define) &&
"Unexpected macro type");
auto *M = DIMacro::get(VMContext, MacroType, LineNumber, Name, Value);
AllMacrosPerParent[Parent].insert(M);
return M;
}
DIMacroFile *DIBuilder::createTempMacroFile(DIMacroFile *Parent,
unsigned LineNumber, DIFile *File) {
auto *MF = DIMacroFile::getTemporary(VMContext, dwarf::DW_MACINFO_start_file,
LineNumber, File, DIMacroNodeArray())
.release();
AllMacrosPerParent[Parent].insert(MF);
// Add the new temporary DIMacroFile to the macro per parent map as a parent.
// This is needed to assure DIMacroFile with no children to have an entry in
// the map. Otherwise, it will not be resolved in DIBuilder::finalize().
AllMacrosPerParent.insert({MF, {}});
return MF;
}
DIEnumerator *DIBuilder::createEnumerator(StringRef Name, int64_t Val,
bool IsUnsigned) {
assert(!Name.empty() && "Unable to create enumerator without name");
return DIEnumerator::get(VMContext, Val, IsUnsigned, Name);
}
DIBasicType *DIBuilder::createUnspecifiedType(StringRef Name) {
assert(!Name.empty() && "Unable to create type without name");
return DIBasicType::get(VMContext, dwarf::DW_TAG_unspecified_type, Name);
}
DIBasicType *DIBuilder::createNullPtrType() {
return createUnspecifiedType("decltype(nullptr)");
}
DIBasicType *DIBuilder::createBasicType(StringRef Name, uint64_t SizeInBits,
unsigned Encoding,
DINode::DIFlags Flags) {
assert(!Name.empty() && "Unable to create type without name");
return DIBasicType::get(VMContext, dwarf::DW_TAG_base_type, Name, SizeInBits,
0, Encoding, Flags);
}
DIDerivedType *DIBuilder::createQualifiedType(unsigned Tag, DIType *FromTy) {
return DIDerivedType::get(VMContext, Tag, "", nullptr, 0, nullptr, FromTy, 0,
0, 0, None, DINode::FlagZero);
}
DIDerivedType *DIBuilder::createPointerType(
DIType *PointeeTy,
uint64_t SizeInBits,
uint32_t AlignInBits,
Optional<unsigned> DWARFAddressSpace,
StringRef Name) {
// FIXME: Why is there a name here?
return DIDerivedType::get(VMContext, dwarf::DW_TAG_pointer_type, Name,
nullptr, 0, nullptr, PointeeTy, SizeInBits,
AlignInBits, 0, DWARFAddressSpace,
DINode::FlagZero);
}
DIDerivedType *DIBuilder::createMemberPointerType(DIType *PointeeTy,
DIType *Base,
uint64_t SizeInBits,
uint32_t AlignInBits,
DINode::DIFlags Flags) {
return DIDerivedType::get(VMContext, dwarf::DW_TAG_ptr_to_member_type, "",
nullptr, 0, nullptr, PointeeTy, SizeInBits,
AlignInBits, 0, None, Flags, Base);
}
DIDerivedType *DIBuilder::createReferenceType(
unsigned Tag, DIType *RTy,
uint64_t SizeInBits,
uint32_t AlignInBits,
Optional<unsigned> DWARFAddressSpace) {
assert(RTy && "Unable to create reference type");
return DIDerivedType::get(VMContext, Tag, "", nullptr, 0, nullptr, RTy,
SizeInBits, AlignInBits, 0, DWARFAddressSpace,
DINode::FlagZero);
}
DIDerivedType *DIBuilder::createTypedef(DIType *Ty, StringRef Name,
DIFile *File, unsigned LineNo,
DIScope *Context) {
return DIDerivedType::get(VMContext, dwarf::DW_TAG_typedef, Name, File,
LineNo, getNonCompileUnitScope(Context), Ty, 0, 0,
0, None, DINode::FlagZero);
}
DIDerivedType *DIBuilder::createFriend(DIType *Ty, DIType *FriendTy) {
assert(Ty && "Invalid type!");
assert(FriendTy && "Invalid friend type!");
return DIDerivedType::get(VMContext, dwarf::DW_TAG_friend, "", nullptr, 0, Ty,
FriendTy, 0, 0, 0, None, DINode::FlagZero);
}
DIDerivedType *DIBuilder::createInheritance(DIType *Ty, DIType *BaseTy,
uint64_t BaseOffset,
uint32_t VBPtrOffset,
DINode::DIFlags Flags) {
assert(Ty && "Unable to create inheritance");
Metadata *ExtraData = ConstantAsMetadata::get(
ConstantInt::get(IntegerType::get(VMContext, 32), VBPtrOffset));
return DIDerivedType::get(VMContext, dwarf::DW_TAG_inheritance, "", nullptr,
0, Ty, BaseTy, 0, 0, BaseOffset, None,
Flags, ExtraData);
}
DIDerivedType *DIBuilder::createMemberType(DIScope *Scope, StringRef Name,
DIFile *File, unsigned LineNumber,
uint64_t SizeInBits,
uint32_t AlignInBits,
uint64_t OffsetInBits,
DINode::DIFlags Flags, DIType *Ty) {
return DIDerivedType::get(VMContext, dwarf::DW_TAG_member, Name, File,
LineNumber, getNonCompileUnitScope(Scope), Ty,
SizeInBits, AlignInBits, OffsetInBits, None, Flags);
}
static ConstantAsMetadata *getConstantOrNull(Constant *C) {
if (C)
return ConstantAsMetadata::get(C);
return nullptr;
}
DIDerivedType *DIBuilder::createVariantMemberType(
DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber,
uint64_t SizeInBits, uint32_t AlignInBits, uint64_t OffsetInBits,
Constant *Discriminant, DINode::DIFlags Flags, DIType *Ty) {
return DIDerivedType::get(VMContext, dwarf::DW_TAG_member, Name, File,
LineNumber, getNonCompileUnitScope(Scope), Ty,
SizeInBits, AlignInBits, OffsetInBits, None, Flags,
getConstantOrNull(Discriminant));
}
DIDerivedType *DIBuilder::createBitFieldMemberType(
DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber,
uint64_t SizeInBits, uint64_t OffsetInBits, uint64_t StorageOffsetInBits,
DINode::DIFlags Flags, DIType *Ty) {
Flags |= DINode::FlagBitField;
return DIDerivedType::get(
VMContext, dwarf::DW_TAG_member, Name, File, LineNumber,
getNonCompileUnitScope(Scope), Ty, SizeInBits, /* AlignInBits */ 0,
OffsetInBits, None, Flags,
ConstantAsMetadata::get(ConstantInt::get(IntegerType::get(VMContext, 64),
StorageOffsetInBits)));
}
DIDerivedType *
DIBuilder::createStaticMemberType(DIScope *Scope, StringRef Name, DIFile *File,
unsigned LineNumber, DIType *Ty,
DINode::DIFlags Flags, llvm::Constant *Val,
uint32_t AlignInBits) {
Flags |= DINode::FlagStaticMember;
return DIDerivedType::get(VMContext, dwarf::DW_TAG_member, Name, File,
LineNumber, getNonCompileUnitScope(Scope), Ty, 0,
AlignInBits, 0, None, Flags,
getConstantOrNull(Val));
}
DIDerivedType *
DIBuilder::createObjCIVar(StringRef Name, DIFile *File, unsigned LineNumber,
uint64_t SizeInBits, uint32_t AlignInBits,
uint64_t OffsetInBits, DINode::DIFlags Flags,
DIType *Ty, MDNode *PropertyNode) {
return DIDerivedType::get(VMContext, dwarf::DW_TAG_member, Name, File,
LineNumber, getNonCompileUnitScope(File), Ty,
SizeInBits, AlignInBits, OffsetInBits, None, Flags,
PropertyNode);
}
DIObjCProperty *
DIBuilder::createObjCProperty(StringRef Name, DIFile *File, unsigned LineNumber,
StringRef GetterName, StringRef SetterName,
unsigned PropertyAttributes, DIType *Ty) {
return DIObjCProperty::get(VMContext, Name, File, LineNumber, GetterName,
SetterName, PropertyAttributes, Ty);
}
DITemplateTypeParameter *
DIBuilder::createTemplateTypeParameter(DIScope *Context, StringRef Name,
DIType *Ty) {
assert((!Context || isa<DICompileUnit>(Context)) && "Expected compile unit");
return DITemplateTypeParameter::get(VMContext, Name, Ty);
}
static DITemplateValueParameter *
createTemplateValueParameterHelper(LLVMContext &VMContext, unsigned Tag,
DIScope *Context, StringRef Name, DIType *Ty,
Metadata *MD) {
assert((!Context || isa<DICompileUnit>(Context)) && "Expected compile unit");
return DITemplateValueParameter::get(VMContext, Tag, Name, Ty, MD);
}
DITemplateValueParameter *
DIBuilder::createTemplateValueParameter(DIScope *Context, StringRef Name,
DIType *Ty, Constant *Val) {
return createTemplateValueParameterHelper(
VMContext, dwarf::DW_TAG_template_value_parameter, Context, Name, Ty,
getConstantOrNull(Val));
}
DITemplateValueParameter *
DIBuilder::createTemplateTemplateParameter(DIScope *Context, StringRef Name,
DIType *Ty, StringRef Val) {
return createTemplateValueParameterHelper(
VMContext, dwarf::DW_TAG_GNU_template_template_param, Context, Name, Ty,
MDString::get(VMContext, Val));
}
DITemplateValueParameter *
DIBuilder::createTemplateParameterPack(DIScope *Context, StringRef Name,
DIType *Ty, DINodeArray Val) {
return createTemplateValueParameterHelper(
VMContext, dwarf::DW_TAG_GNU_template_parameter_pack, Context, Name, Ty,
Val.get());
}
DICompositeType *DIBuilder::createClassType(
DIScope *Context, StringRef Name, DIFile *File, unsigned LineNumber,
uint64_t SizeInBits, uint32_t AlignInBits, uint64_t OffsetInBits,
DINode::DIFlags Flags, DIType *DerivedFrom, DINodeArray Elements,
DIType *VTableHolder, MDNode *TemplateParams, StringRef UniqueIdentifier) {
assert((!Context || isa<DIScope>(Context)) &&
"createClassType should be called with a valid Context");
auto *R = DICompositeType::get(
VMContext, dwarf::DW_TAG_structure_type, Name, File, LineNumber,
getNonCompileUnitScope(Context), DerivedFrom, SizeInBits, AlignInBits,
OffsetInBits, Flags, Elements, 0, VTableHolder,
cast_or_null<MDTuple>(TemplateParams), UniqueIdentifier);
trackIfUnresolved(R);
return R;
}
DICompositeType *DIBuilder::createStructType(
DIScope *Context, StringRef Name, DIFile *File, unsigned LineNumber,
uint64_t SizeInBits, uint32_t AlignInBits, DINode::DIFlags Flags,
DIType *DerivedFrom, DINodeArray Elements, unsigned RunTimeLang,
DIType *VTableHolder, StringRef UniqueIdentifier) {
auto *R = DICompositeType::get(
VMContext, dwarf::DW_TAG_structure_type, Name, File, LineNumber,
getNonCompileUnitScope(Context), DerivedFrom, SizeInBits, AlignInBits, 0,
Flags, Elements, RunTimeLang, VTableHolder, nullptr, UniqueIdentifier);
trackIfUnresolved(R);
return R;
}
DICompositeType *DIBuilder::createUnionType(
DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber,
uint64_t SizeInBits, uint32_t AlignInBits, DINode::DIFlags Flags,
DINodeArray Elements, unsigned RunTimeLang, StringRef UniqueIdentifier) {
auto *R = DICompositeType::get(
VMContext, dwarf::DW_TAG_union_type, Name, File, LineNumber,
getNonCompileUnitScope(Scope), nullptr, SizeInBits, AlignInBits, 0, Flags,
Elements, RunTimeLang, nullptr, nullptr, UniqueIdentifier);
trackIfUnresolved(R);
return R;
}
DICompositeType *DIBuilder::createVariantPart(
DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber,
uint64_t SizeInBits, uint32_t AlignInBits, DINode::DIFlags Flags,
DIDerivedType *Discriminator, DINodeArray Elements, StringRef UniqueIdentifier) {
auto *R = DICompositeType::get(
VMContext, dwarf::DW_TAG_variant_part, Name, File, LineNumber,
getNonCompileUnitScope(Scope), nullptr, SizeInBits, AlignInBits, 0, Flags,
Elements, 0, nullptr, nullptr, UniqueIdentifier, Discriminator);
trackIfUnresolved(R);
return R;
}
DISubroutineType *DIBuilder::createSubroutineType(DITypeRefArray ParameterTypes,
DINode::DIFlags Flags,
unsigned CC) {
return DISubroutineType::get(VMContext, Flags, CC, ParameterTypes);
}
DICompositeType *DIBuilder::createEnumerationType(
DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber,
uint64_t SizeInBits, uint32_t AlignInBits, DINodeArray Elements,
DIType *UnderlyingType, StringRef UniqueIdentifier, bool IsScoped) {
auto *CTy = DICompositeType::get(
VMContext, dwarf::DW_TAG_enumeration_type, Name, File, LineNumber,
getNonCompileUnitScope(Scope), UnderlyingType, SizeInBits, AlignInBits, 0,
IsScoped ? DINode::FlagEnumClass : DINode::FlagZero, Elements, 0, nullptr,
nullptr, UniqueIdentifier);
AllEnumTypes.push_back(CTy);
trackIfUnresolved(CTy);
return CTy;
}
DICompositeType *DIBuilder::createArrayType(uint64_t Size,
uint32_t AlignInBits, DIType *Ty,
DINodeArray Subscripts) {
auto *R = DICompositeType::get(VMContext, dwarf::DW_TAG_array_type, "",
nullptr, 0, nullptr, Ty, Size, AlignInBits, 0,
DINode::FlagZero, Subscripts, 0, nullptr);
trackIfUnresolved(R);
return R;
}
DICompositeType *DIBuilder::createVectorType(uint64_t Size,
uint32_t AlignInBits, DIType *Ty,
DINodeArray Subscripts) {
auto *R = DICompositeType::get(VMContext, dwarf::DW_TAG_array_type, "",
nullptr, 0, nullptr, Ty, Size, AlignInBits, 0,
DINode::FlagVector, Subscripts, 0, nullptr);
trackIfUnresolved(R);
return R;
}
DISubprogram *DIBuilder::createArtificialSubprogram(DISubprogram *SP) {
auto NewSP = SP->cloneWithFlags(SP->getFlags() | DINode::FlagArtificial);
return MDNode::replaceWithDistinct(std::move(NewSP));
}
static DIType *createTypeWithFlags(const DIType *Ty,
DINode::DIFlags FlagsToSet) {
auto NewTy = Ty->cloneWithFlags(Ty->getFlags() | FlagsToSet);
return MDNode::replaceWithUniqued(std::move(NewTy));
}
DIType *DIBuilder::createArtificialType(DIType *Ty) {
// FIXME: Restrict this to the nodes where it's valid.
if (Ty->isArtificial())
return Ty;
return createTypeWithFlags(Ty, DINode::FlagArtificial);
}
DIType *DIBuilder::createObjectPointerType(DIType *Ty) {
// FIXME: Restrict this to the nodes where it's valid.
if (Ty->isObjectPointer())
return Ty;
DINode::DIFlags Flags = DINode::FlagObjectPointer | DINode::FlagArtificial;
return createTypeWithFlags(Ty, Flags);
}
void DIBuilder::retainType(DIScope *T) {
assert(T && "Expected non-null type");
assert((isa<DIType>(T) || (isa<DISubprogram>(T) &&
cast<DISubprogram>(T)->isDefinition() == false)) &&
"Expected type or subprogram declaration");
AllRetainTypes.emplace_back(T);
}
DIBasicType *DIBuilder::createUnspecifiedParameter() { return nullptr; }
DICompositeType *
DIBuilder::createForwardDecl(unsigned Tag, StringRef Name, DIScope *Scope,
DIFile *F, unsigned Line, unsigned RuntimeLang,
uint64_t SizeInBits, uint32_t AlignInBits,
StringRef UniqueIdentifier) {
// FIXME: Define in terms of createReplaceableForwardDecl() by calling
// replaceWithUniqued().
auto *RetTy = DICompositeType::get(
VMContext, Tag, Name, F, Line, getNonCompileUnitScope(Scope), nullptr,
SizeInBits, AlignInBits, 0, DINode::FlagFwdDecl, nullptr, RuntimeLang,
nullptr, nullptr, UniqueIdentifier);
trackIfUnresolved(RetTy);
return RetTy;
}
DICompositeType *DIBuilder::createReplaceableCompositeType(
unsigned Tag, StringRef Name, DIScope *Scope, DIFile *F, unsigned Line,
unsigned RuntimeLang, uint64_t SizeInBits, uint32_t AlignInBits,
DINode::DIFlags Flags, StringRef UniqueIdentifier) {
auto *RetTy =
DICompositeType::getTemporary(
VMContext, Tag, Name, F, Line, getNonCompileUnitScope(Scope), nullptr,
SizeInBits, AlignInBits, 0, Flags, nullptr, RuntimeLang, nullptr,
nullptr, UniqueIdentifier)
.release();
trackIfUnresolved(RetTy);
return RetTy;
}
DINodeArray DIBuilder::getOrCreateArray(ArrayRef<Metadata *> Elements) {
return MDTuple::get(VMContext, Elements);
}
DIMacroNodeArray
DIBuilder::getOrCreateMacroArray(ArrayRef<Metadata *> Elements) {
return MDTuple::get(VMContext, Elements);
}
DITypeRefArray DIBuilder::getOrCreateTypeArray(ArrayRef<Metadata *> Elements) {
SmallVector<llvm::Metadata *, 16> Elts;
for (unsigned i = 0, e = Elements.size(); i != e; ++i) {
if (Elements[i] && isa<MDNode>(Elements[i]))
Elts.push_back(cast<DIType>(Elements[i]));
else
Elts.push_back(Elements[i]);
}
return DITypeRefArray(MDNode::get(VMContext, Elts));
}
DISubrange *DIBuilder::getOrCreateSubrange(int64_t Lo, int64_t Count) {
return DISubrange::get(VMContext, Count, Lo);
}
DISubrange *DIBuilder::getOrCreateSubrange(int64_t Lo, Metadata *CountNode) {
return DISubrange::get(VMContext, CountNode, Lo);
}
static void checkGlobalVariableScope(DIScope *Context) {
#ifndef NDEBUG
if (auto *CT =
dyn_cast_or_null<DICompositeType>(getNonCompileUnitScope(Context)))
assert(CT->getIdentifier().empty() &&
"Context of a global variable should not be a type with identifier");
#endif
}
DIGlobalVariableExpression *DIBuilder::createGlobalVariableExpression(
DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *F,
unsigned LineNumber, DIType *Ty, bool isLocalToUnit, DIExpression *Expr,
MDNode *Decl, MDTuple *templateParams, uint32_t AlignInBits) {
checkGlobalVariableScope(Context);
auto *GV = DIGlobalVariable::getDistinct(
VMContext, cast_or_null<DIScope>(Context), Name, LinkageName, F,
LineNumber, Ty, isLocalToUnit, true, cast_or_null<DIDerivedType>(Decl),
templateParams, AlignInBits);
if (!Expr)
Expr = createExpression();
auto *N = DIGlobalVariableExpression::get(VMContext, GV, Expr);
AllGVs.push_back(N);
return N;
}
DIGlobalVariable *DIBuilder::createTempGlobalVariableFwdDecl(
DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *F,
unsigned LineNumber, DIType *Ty, bool isLocalToUnit, MDNode *Decl,
MDTuple *templateParams, uint32_t AlignInBits) {
checkGlobalVariableScope(Context);
return DIGlobalVariable::getTemporary(
VMContext, cast_or_null<DIScope>(Context), Name, LinkageName, F,
LineNumber, Ty, isLocalToUnit, false,
cast_or_null<DIDerivedType>(Decl), templateParams, AlignInBits)
.release();
}
static DILocalVariable *createLocalVariable(
LLVMContext &VMContext,
DenseMap<MDNode *, SmallVector<TrackingMDNodeRef, 1>> &PreservedVariables,
DIScope *Scope, StringRef Name, unsigned ArgNo, DIFile *File,
unsigned LineNo, DIType *Ty, bool AlwaysPreserve, DINode::DIFlags Flags,
uint32_t AlignInBits) {
// FIXME: Why getNonCompileUnitScope()?
// FIXME: Why is "!Context" okay here?
// FIXME: Why doesn't this check for a subprogram or lexical block (AFAICT
// the only valid scopes)?
DIScope *Context = getNonCompileUnitScope(Scope);
auto *Node =
DILocalVariable::get(VMContext, cast_or_null<DILocalScope>(Context), Name,
File, LineNo, Ty, ArgNo, Flags, AlignInBits);
if (AlwaysPreserve) {
// The optimizer may remove local variables. If there is an interest
// to preserve variable info in such situation then stash it in a
// named mdnode.
DISubprogram *Fn = getDISubprogram(Scope);
assert(Fn && "Missing subprogram for local variable");
PreservedVariables[Fn].emplace_back(Node);
}
return Node;
}
DILocalVariable *DIBuilder::createAutoVariable(DIScope *Scope, StringRef Name,
DIFile *File, unsigned LineNo,
DIType *Ty, bool AlwaysPreserve,
DINode::DIFlags Flags,
uint32_t AlignInBits) {
return createLocalVariable(VMContext, PreservedVariables, Scope, Name,
/* ArgNo */ 0, File, LineNo, Ty, AlwaysPreserve,
Flags, AlignInBits);
}
DILocalVariable *DIBuilder::createParameterVariable(
DIScope *Scope, StringRef Name, unsigned ArgNo, DIFile *File,
unsigned LineNo, DIType *Ty, bool AlwaysPreserve, DINode::DIFlags Flags) {
assert(ArgNo && "Expected non-zero argument number for parameter");
return createLocalVariable(VMContext, PreservedVariables, Scope, Name, ArgNo,
File, LineNo, Ty, AlwaysPreserve, Flags,
/* AlignInBits */0);
}
DILabel *DIBuilder::createLabel(
DIScope *Scope, StringRef Name, DIFile *File,
unsigned LineNo, bool AlwaysPreserve) {
DIScope *Context = getNonCompileUnitScope(Scope);
auto *Node =
DILabel::get(VMContext, cast_or_null<DILocalScope>(Context), Name,
File, LineNo);
if (AlwaysPreserve) {
/// The optimizer may remove labels. If there is an interest
/// to preserve label info in such situation then append it to
/// the list of retained nodes of the DISubprogram.
DISubprogram *Fn = getDISubprogram(Scope);
assert(Fn && "Missing subprogram for label");
PreservedLabels[Fn].emplace_back(Node);
}
return Node;
}
DIExpression *DIBuilder::createExpression(ArrayRef<uint64_t> Addr) {
return DIExpression::get(VMContext, Addr);
}
DIExpression *DIBuilder::createExpression(ArrayRef<int64_t> Signed) {
// TODO: Remove the callers of this signed version and delete.
SmallVector<uint64_t, 8> Addr(Signed.begin(), Signed.end());
return createExpression(Addr);
}
template <class... Ts>
static DISubprogram *getSubprogram(bool IsDistinct, Ts &&... Args) {
if (IsDistinct)
return DISubprogram::getDistinct(std::forward<Ts>(Args)...);
return DISubprogram::get(std::forward<Ts>(Args)...);
}
DISubprogram *DIBuilder::createFunction(
DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *File,
unsigned LineNo, DISubroutineType *Ty, unsigned ScopeLine,
DINode::DIFlags Flags, DISubprogram::DISPFlags SPFlags,
DITemplateParameterArray TParams, DISubprogram *Decl,
DITypeArray ThrownTypes) {
bool IsDefinition = SPFlags & DISubprogram::SPFlagDefinition;
auto *Node = getSubprogram(
/*IsDistinct=*/IsDefinition, VMContext, getNonCompileUnitScope(Context),
Name, LinkageName, File, LineNo, Ty, ScopeLine, nullptr, 0, 0, Flags,
SPFlags, IsDefinition ? CUNode : nullptr, TParams, Decl,
MDTuple::getTemporary(VMContext, None).release(), ThrownTypes);
if (IsDefinition)
AllSubprograms.push_back(Node);
trackIfUnresolved(Node);
return Node;
}
DISubprogram *DIBuilder::createTempFunctionFwdDecl(
DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *File,
unsigned LineNo, DISubroutineType *Ty, unsigned ScopeLine,
DINode::DIFlags Flags, DISubprogram::DISPFlags SPFlags,
DITemplateParameterArray TParams, DISubprogram *Decl,
DITypeArray ThrownTypes) {
bool IsDefinition = SPFlags & DISubprogram::SPFlagDefinition;
return DISubprogram::getTemporary(VMContext, getNonCompileUnitScope(Context),
Name, LinkageName, File, LineNo, Ty,
ScopeLine, nullptr, 0, 0, Flags, SPFlags,
IsDefinition ? CUNode : nullptr, TParams,
Decl, nullptr, ThrownTypes)
.release();
}
DISubprogram *DIBuilder::createMethod(
DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *F,
unsigned LineNo, DISubroutineType *Ty, unsigned VIndex, int ThisAdjustment,
DIType *VTableHolder, DINode::DIFlags Flags,
DISubprogram::DISPFlags SPFlags, DITemplateParameterArray TParams,
DITypeArray ThrownTypes) {
assert(getNonCompileUnitScope(Context) &&
"Methods should have both a Context and a context that isn't "
"the compile unit.");
// FIXME: Do we want to use different scope/lines?
bool IsDefinition = SPFlags & DISubprogram::SPFlagDefinition;
auto *SP = getSubprogram(
/*IsDistinct=*/IsDefinition, VMContext, cast<DIScope>(Context), Name,
LinkageName, F, LineNo, Ty, LineNo, VTableHolder, VIndex, ThisAdjustment,
Flags, SPFlags, IsDefinition ? CUNode : nullptr, TParams, nullptr,
nullptr, ThrownTypes);
if (IsDefinition)
AllSubprograms.push_back(SP);
trackIfUnresolved(SP);
return SP;
}
DICommonBlock *DIBuilder::createCommonBlock(
DIScope *Scope, DIGlobalVariable *Decl, StringRef Name, DIFile *File,
unsigned LineNo) {
return DICommonBlock::get(
VMContext, Scope, Decl, Name, File, LineNo);
}
DINamespace *DIBuilder::createNameSpace(DIScope *Scope, StringRef Name,
bool ExportSymbols) {
// It is okay to *not* make anonymous top-level namespaces distinct, because
// all nodes that have an anonymous namespace as their parent scope are
// guaranteed to be unique and/or are linked to their containing
// DICompileUnit. This decision is an explicit tradeoff of link time versus
// memory usage versus code simplicity and may get revisited in the future.
return DINamespace::get(VMContext, getNonCompileUnitScope(Scope), Name,
ExportSymbols);
}
DIModule *DIBuilder::createModule(DIScope *Scope, StringRef Name,
StringRef ConfigurationMacros,
StringRef IncludePath,
StringRef ISysRoot) {
return DIModule::get(VMContext, getNonCompileUnitScope(Scope), Name,
ConfigurationMacros, IncludePath, ISysRoot);
}
DILexicalBlockFile *DIBuilder::createLexicalBlockFile(DIScope *Scope,
DIFile *File,
unsigned Discriminator) {
return DILexicalBlockFile::get(VMContext, Scope, File, Discriminator);
}
DILexicalBlock *DIBuilder::createLexicalBlock(DIScope *Scope, DIFile *File,
unsigned Line, unsigned Col) {
// Make these distinct, to avoid merging two lexical blocks on the same
// file/line/column.
return DILexicalBlock::getDistinct(VMContext, getNonCompileUnitScope(Scope),
File, Line, Col);
}
Instruction *DIBuilder::insertDeclare(Value *Storage, DILocalVariable *VarInfo,
DIExpression *Expr, const DILocation *DL,
Instruction *InsertBefore) {
return insertDeclare(Storage, VarInfo, Expr, DL, InsertBefore->getParent(),
InsertBefore);
}
Instruction *DIBuilder::insertDeclare(Value *Storage, DILocalVariable *VarInfo,
DIExpression *Expr, const DILocation *DL,
BasicBlock *InsertAtEnd) {
// If this block already has a terminator then insert this intrinsic before
// the terminator. Otherwise, put it at the end of the block.
Instruction *InsertBefore = InsertAtEnd->getTerminator();
return insertDeclare(Storage, VarInfo, Expr, DL, InsertAtEnd, InsertBefore);
}
Instruction *DIBuilder::insertLabel(DILabel *LabelInfo, const DILocation *DL,
Instruction *InsertBefore) {
return insertLabel(
LabelInfo, DL, InsertBefore ? InsertBefore->getParent() : nullptr,
InsertBefore);
}
Instruction *DIBuilder::insertLabel(DILabel *LabelInfo, const DILocation *DL,
BasicBlock *InsertAtEnd) {
return insertLabel(LabelInfo, DL, InsertAtEnd, nullptr);
}
Instruction *DIBuilder::insertDbgValueIntrinsic(Value *V,
DILocalVariable *VarInfo,
DIExpression *Expr,
const DILocation *DL,
Instruction *InsertBefore) {
return insertDbgValueIntrinsic(
V, VarInfo, Expr, DL, InsertBefore ? InsertBefore->getParent() : nullptr,
InsertBefore);
}
Instruction *DIBuilder::insertDbgValueIntrinsic(Value *V,
DILocalVariable *VarInfo,
DIExpression *Expr,
const DILocation *DL,
BasicBlock *InsertAtEnd) {
return insertDbgValueIntrinsic(V, VarInfo, Expr, DL, InsertAtEnd, nullptr);
}
/// Return an IRBuilder for inserting dbg.declare and dbg.value intrinsics. This
/// abstracts over the various ways to specify an insert position.
static IRBuilder<> getIRBForDbgInsertion(const DILocation *DL,
BasicBlock *InsertBB,
Instruction *InsertBefore) {
IRBuilder<> B(DL->getContext());
if (InsertBefore)
B.SetInsertPoint(InsertBefore);
else if (InsertBB)
B.SetInsertPoint(InsertBB);
B.SetCurrentDebugLocation(DL);
return B;
}
static Value *getDbgIntrinsicValueImpl(LLVMContext &VMContext, Value *V) {
assert(V && "no value passed to dbg intrinsic");
return MetadataAsValue::get(VMContext, ValueAsMetadata::get(V));
}
static Function *getDeclareIntrin(Module &M) {
return Intrinsic::getDeclaration(&M, UseDbgAddr ? Intrinsic::dbg_addr
: Intrinsic::dbg_declare);
}
Instruction *DIBuilder::insertDeclare(Value *Storage, DILocalVariable *VarInfo,
DIExpression *Expr, const DILocation *DL,
BasicBlock *InsertBB, Instruction *InsertBefore) {
assert(VarInfo && "empty or invalid DILocalVariable* passed to dbg.declare");
assert(DL && "Expected debug loc");
assert(DL->getScope()->getSubprogram() ==
VarInfo->getScope()->getSubprogram() &&
"Expected matching subprograms");
if (!DeclareFn)
DeclareFn = getDeclareIntrin(M);
trackIfUnresolved(VarInfo);
trackIfUnresolved(Expr);
Value *Args[] = {getDbgIntrinsicValueImpl(VMContext, Storage),
MetadataAsValue::get(VMContext, VarInfo),
MetadataAsValue::get(VMContext, Expr)};
IRBuilder<> B = getIRBForDbgInsertion(DL, InsertBB, InsertBefore);
return B.CreateCall(DeclareFn, Args);
}
Instruction *DIBuilder::insertDbgValueIntrinsic(
Value *V, DILocalVariable *VarInfo, DIExpression *Expr,
const DILocation *DL, BasicBlock *InsertBB, Instruction *InsertBefore) {
assert(V && "no value passed to dbg.value");
assert(VarInfo && "empty or invalid DILocalVariable* passed to dbg.value");
assert(DL && "Expected debug loc");
assert(DL->getScope()->getSubprogram() ==
VarInfo->getScope()->getSubprogram() &&
"Expected matching subprograms");
if (!ValueFn)
ValueFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_value);
trackIfUnresolved(VarInfo);
trackIfUnresolved(Expr);
Value *Args[] = {getDbgIntrinsicValueImpl(VMContext, V),
MetadataAsValue::get(VMContext, VarInfo),
MetadataAsValue::get(VMContext, Expr)};
IRBuilder<> B = getIRBForDbgInsertion(DL, InsertBB, InsertBefore);
return B.CreateCall(ValueFn, Args);
}
Instruction *DIBuilder::insertLabel(
DILabel *LabelInfo, const DILocation *DL,
BasicBlock *InsertBB, Instruction *InsertBefore) {
assert(LabelInfo && "empty or invalid DILabel* passed to dbg.label");
assert(DL && "Expected debug loc");
assert(DL->getScope()->getSubprogram() ==
LabelInfo->getScope()->getSubprogram() &&
"Expected matching subprograms");
if (!LabelFn)
LabelFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_label);
trackIfUnresolved(LabelInfo);
Value *Args[] = {MetadataAsValue::get(VMContext, LabelInfo)};
IRBuilder<> B = getIRBForDbgInsertion(DL, InsertBB, InsertBefore);
return B.CreateCall(LabelFn, Args);
}
void DIBuilder::replaceVTableHolder(DICompositeType *&T,
DIType *VTableHolder) {
{
TypedTrackingMDRef<DICompositeType> N(T);
N->replaceVTableHolder(VTableHolder);
T = N.get();
}
// If this didn't create a self-reference, just return.
if (T != VTableHolder)
return;
// Look for unresolved operands. T will drop RAUW support, orphaning any
// cycles underneath it.
if (T->isResolved())
for (const MDOperand &O : T->operands())
if (auto *N = dyn_cast_or_null<MDNode>(O))
trackIfUnresolved(N);
}
void DIBuilder::replaceArrays(DICompositeType *&T, DINodeArray Elements,
DINodeArray TParams) {
{
TypedTrackingMDRef<DICompositeType> N(T);
if (Elements)
N->replaceElements(Elements);
if (TParams)
N->replaceTemplateParams(DITemplateParameterArray(TParams));
T = N.get();
}
// If T isn't resolved, there's no problem.
if (!T->isResolved())
return;
// If T is resolved, it may be due to a self-reference cycle. Track the
// arrays explicitly if they're unresolved, or else the cycles will be
// orphaned.
if (Elements)
trackIfUnresolved(Elements.get());
if (TParams)
trackIfUnresolved(TParams.get());
}
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