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[DebugInfo] Add another level to DebugInfoKind called Constructor 

The option will limit debug info by only emitting complete class
type information when its constructor is emitted.
This patch changes comparisons with LimitedDebugInfo to use the new
level instead.

Differential Revision: https://reviews.llvm.org/D72427
This commit is contained in:
Amy Huang 2020-01-13 15:54:54 -08:00
parent c774840492
commit 53539bb032
11 changed files with 43 additions and 37 deletions
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5
clang/include/clang/Basic/CodeGenOptions.h
View File

@ -357,6 +357,11 @@ public:
/// Check if CSIR profile use is on.
bool hasProfileCSIRUse() const { return getProfileUse() == ProfileCSIRInstr; }
/// Check if type and variable info should be emitted.
bool hasReducedDebugInfo() const {
return getDebugInfo() >= codegenoptions::DebugInfoConstructor;
}
};
} // end namespace clang

5
clang/include/clang/Basic/DebugInfoOptions.h
View File

@ -34,6 +34,11 @@ enum DebugInfoKind {
/// (-gline-tables-only).
DebugLineTablesOnly,
/// Limit generated debug info for classes to reduce size. This emits class
/// type info only where the constructor is emitted, if it is a class that
/// has a constructor.
DebugInfoConstructor,
/// Limit generated debug info to reduce size (-fno-standalone-debug). This
/// emits forward decls for types that could be replaced with forward decls in
/// the source code. For dynamic C++ classes type info is only emitted into

6
clang/lib/CodeGen/CGBlocks.cpp
View File

@ -1483,8 +1483,7 @@ void CodeGenFunction::setBlockContextParameter(const ImplicitParamDecl *D,
Address alloc = CreateMemTemp(D->getType(), D->getName() + ".addr");
Builder.CreateStore(arg, alloc);
if (CGDebugInfo *DI = getDebugInfo()) {
if (CGM.getCodeGenOpts().getDebugInfo() >=
codegenoptions::LimitedDebugInfo) {
if (CGM.getCodeGenOpts().hasReducedDebugInfo()) {
DI->setLocation(D->getLocation());
DI->EmitDeclareOfBlockLiteralArgVariable(
*BlockInfo, D->getName(), argNum,
@ -1656,8 +1655,7 @@ CodeGenFunction::GenerateBlockFunction(GlobalDecl GD,
const VarDecl *variable = CI.getVariable();
DI->EmitLocation(Builder, variable->getLocation());
if (CGM.getCodeGenOpts().getDebugInfo() >=
codegenoptions::LimitedDebugInfo) {
if (CGM.getCodeGenOpts().hasReducedDebugInfo()) {
const CGBlockInfo::Capture &capture = blockInfo.getCapture(variable);
if (capture.isConstant()) {
auto addr = LocalDeclMap.find(variable)->second;

33
clang/lib/CodeGen/CGDebugInfo.cpp
View File

@ -591,6 +591,7 @@ void CGDebugInfo::CreateCompileUnit() {
case codegenoptions::DebugDirectivesOnly:
EmissionKind = llvm::DICompileUnit::DebugDirectivesOnly;
break;
case codegenoptions::DebugInfoConstructor:
case codegenoptions::LimitedDebugInfo:
case codegenoptions::FullDebugInfo:
EmissionKind = llvm::DICompileUnit::FullDebug;
@ -2043,7 +2044,7 @@ void CGDebugInfo::CollectVTableInfo(const CXXRecordDecl *RD, llvm::DIFile *Unit,
llvm::DIType *CGDebugInfo::getOrCreateRecordType(QualType RTy,
SourceLocation Loc) {
assert(DebugKind >= codegenoptions::LimitedDebugInfo);
assert(CGM.getCodeGenOpts().hasReducedDebugInfo());
llvm::DIType *T = getOrCreateType(RTy, getOrCreateFile(Loc));
return T;
}
@ -2055,7 +2056,7 @@ llvm::DIType *CGDebugInfo::getOrCreateInterfaceType(QualType D,
llvm::DIType *CGDebugInfo::getOrCreateStandaloneType(QualType D,
SourceLocation Loc) {
assert(DebugKind >= codegenoptions::LimitedDebugInfo);
assert(CGM.getCodeGenOpts().hasReducedDebugInfo());
assert(!D.isNull() && "null type");
llvm::DIType *T = getOrCreateType(D, getOrCreateFile(Loc));
assert(T && "could not create debug info for type");
@ -3270,7 +3271,7 @@ void CGDebugInfo::collectFunctionDeclProps(GlobalDecl GD, llvm::DIFile *Unit,
DebugKind <= codegenoptions::DebugLineTablesOnly))
LinkageName = StringRef();
if (DebugKind >= codegenoptions::LimitedDebugInfo) {
if (CGM.getCodeGenOpts().hasReducedDebugInfo()) {
if (const NamespaceDecl *NSDecl =
dyn_cast_or_null<NamespaceDecl>(FD->getDeclContext()))
FDContext = getOrCreateNamespace(NSDecl);
@ -3957,7 +3958,7 @@ llvm::DILocalVariable *CGDebugInfo::EmitDeclare(const VarDecl *VD,
llvm::Optional<unsigned> ArgNo,
CGBuilderTy &Builder,
const bool UsePointerValue) {
assert(DebugKind >= codegenoptions::LimitedDebugInfo);
assert(CGM.getCodeGenOpts().hasReducedDebugInfo());
assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!");
if (VD->hasAttr<NoDebugAttr>())
return nullptr;
@ -4091,12 +4092,12 @@ llvm::DILocalVariable *
CGDebugInfo::EmitDeclareOfAutoVariable(const VarDecl *VD, llvm::Value *Storage,
CGBuilderTy &Builder,
const bool UsePointerValue) {
assert(DebugKind >= codegenoptions::LimitedDebugInfo);
assert(CGM.getCodeGenOpts().hasReducedDebugInfo());
return EmitDeclare(VD, Storage, llvm::None, Builder, UsePointerValue);
}
void CGDebugInfo::EmitLabel(const LabelDecl *D, CGBuilderTy &Builder) {
assert(DebugKind >= codegenoptions::LimitedDebugInfo);
assert(CGM.getCodeGenOpts().hasReducedDebugInfo());
assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!");
if (D->hasAttr<NoDebugAttr>())
@ -4132,7 +4133,7 @@ llvm::DIType *CGDebugInfo::CreateSelfType(const QualType &QualTy,
void CGDebugInfo::EmitDeclareOfBlockDeclRefVariable(
const VarDecl *VD, llvm::Value *Storage, CGBuilderTy &Builder,
const CGBlockInfo &blockInfo, llvm::Instruction *InsertPoint) {
assert(DebugKind >= codegenoptions::LimitedDebugInfo);
assert(CGM.getCodeGenOpts().hasReducedDebugInfo());
assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!");
if (Builder.GetInsertBlock() == nullptr)
@ -4203,7 +4204,7 @@ void CGDebugInfo::EmitDeclareOfBlockDeclRefVariable(
void CGDebugInfo::EmitDeclareOfArgVariable(const VarDecl *VD, llvm::Value *AI,
unsigned ArgNo,
CGBuilderTy &Builder) {
assert(DebugKind >= codegenoptions::LimitedDebugInfo);
assert(CGM.getCodeGenOpts().hasReducedDebugInfo());
EmitDeclare(VD, AI, ArgNo, Builder);
}
@ -4260,7 +4261,7 @@ void CGDebugInfo::EmitDeclareOfBlockLiteralArgVariable(const CGBlockInfo &block,
unsigned ArgNo,
llvm::AllocaInst *Alloca,
CGBuilderTy &Builder) {
assert(DebugKind >= codegenoptions::LimitedDebugInfo);
assert(CGM.getCodeGenOpts().hasReducedDebugInfo());
ASTContext &C = CGM.getContext();
const BlockDecl *blockDecl = block.getBlockDecl();
@ -4426,7 +4427,7 @@ llvm::DIGlobalVariableExpression *CGDebugInfo::CollectAnonRecordDecls(
void CGDebugInfo::EmitGlobalVariable(llvm::GlobalVariable *Var,
const VarDecl *D) {
assert(DebugKind >= codegenoptions::LimitedDebugInfo);
assert(CGM.getCodeGenOpts().hasReducedDebugInfo());
if (D->hasAttr<NoDebugAttr>())
return;
@ -4495,7 +4496,7 @@ void CGDebugInfo::EmitGlobalVariable(llvm::GlobalVariable *Var,
}
void CGDebugInfo::EmitGlobalVariable(const ValueDecl *VD, const APValue &Init) {
assert(DebugKind >= codegenoptions::LimitedDebugInfo);
assert(CGM.getCodeGenOpts().hasReducedDebugInfo());
if (VD->hasAttr<NoDebugAttr>())
return;
llvm::TimeTraceScope TimeScope("DebugConstGlobalVariable", [&]() {
@ -4594,7 +4595,7 @@ void CGDebugInfo::EmitGlobalVariable(const ValueDecl *VD, const APValue &Init) {
void CGDebugInfo::EmitExternalVariable(llvm::GlobalVariable *Var,
const VarDecl *D) {
assert(DebugKind >= codegenoptions::LimitedDebugInfo);
assert(CGM.getCodeGenOpts().hasReducedDebugInfo());
if (D->hasAttr<NoDebugAttr>())
return;
@ -4619,7 +4620,7 @@ llvm::DIScope *CGDebugInfo::getCurrentContextDescriptor(const Decl *D) {
}
void CGDebugInfo::EmitUsingDirective(const UsingDirectiveDecl &UD) {
if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo)
if (!CGM.getCodeGenOpts().hasReducedDebugInfo())
return;
const NamespaceDecl *NSDecl = UD.getNominatedNamespace();
if (!NSDecl->isAnonymousNamespace() ||
@ -4632,7 +4633,7 @@ void CGDebugInfo::EmitUsingDirective(const UsingDirectiveDecl &UD) {
}
void CGDebugInfo::EmitUsingDecl(const UsingDecl &UD) {
if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo)
if (!CGM.getCodeGenOpts().hasReducedDebugInfo())
return;
assert(UD.shadow_size() &&
"We shouldn't be codegening an invalid UsingDecl containing no decls");
@ -4673,7 +4674,7 @@ void CGDebugInfo::EmitImportDecl(const ImportDecl &ID) {
llvm::DIImportedEntity *
CGDebugInfo::EmitNamespaceAlias(const NamespaceAliasDecl &NA) {
if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo)
if (!CGM.getCodeGenOpts().hasReducedDebugInfo())
return nullptr;
auto &VH = NamespaceAliasCache[&NA];
if (VH)
@ -4795,7 +4796,7 @@ void CGDebugInfo::finalize() {
}
void CGDebugInfo::EmitExplicitCastType(QualType Ty) {
if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo)
if (!CGM.getCodeGenOpts().hasReducedDebugInfo())
return;
if (auto *DieTy = getOrCreateType(Ty, TheCU->getFile()))

10
clang/lib/CodeGen/CGDecl.cpp
View File

@ -446,8 +446,7 @@ void CodeGenFunction::EmitStaticVarDecl(const VarDecl &D,
// Emit global variable debug descriptor for static vars.
CGDebugInfo *DI = getDebugInfo();
if (DI &&
CGM.getCodeGenOpts().getDebugInfo() >= codegenoptions::LimitedDebugInfo) {
if (DI && CGM.getCodeGenOpts().hasReducedDebugInfo()) {
DI->setLocation(D.getLocation());
DI->EmitGlobalVariable(var, &D);
}
@ -1394,8 +1393,7 @@ CodeGenFunction::EmitAutoVarAlloca(const VarDecl &D) {
EmitVariablyModifiedType(Ty);
auto *DI = getDebugInfo();
bool EmitDebugInfo = DI && CGM.getCodeGenOpts().getDebugInfo() >=
codegenoptions::LimitedDebugInfo;
bool EmitDebugInfo = DI && CGM.getCodeGenOpts().hasReducedDebugInfo();
Address address = Address::invalid();
Address AllocaAddr = Address::invalid();
@ -2496,9 +2494,7 @@ void CodeGenFunction::EmitParmDecl(const VarDecl &D, ParamValue Arg,
// Emit debug info for param declarations in non-thunk functions.
if (CGDebugInfo *DI = getDebugInfo()) {
if (CGM.getCodeGenOpts().getDebugInfo() >=
codegenoptions::LimitedDebugInfo &&
!CurFuncIsThunk) {
if (CGM.getCodeGenOpts().hasReducedDebugInfo() && !CurFuncIsThunk) {
DI->EmitDeclareOfArgVariable(&D, DeclPtr.getPointer(), ArgNo, Builder);
}
}

3
clang/lib/CodeGen/CGStmt.cpp
View File

@ -562,8 +562,7 @@ void CodeGenFunction::EmitLabel(const LabelDecl *D) {
// Emit debug info for labels.
if (CGDebugInfo *DI = getDebugInfo()) {
if (CGM.getCodeGenOpts().getDebugInfo() >=
codegenoptions::LimitedDebugInfo) {
if (CGM.getCodeGenOpts().hasReducedDebugInfo()) {
DI->setLocation(D->getLocation());
DI->EmitLabel(D, Builder);
}

3
clang/lib/CodeGen/CGStmtOpenMP.cpp
View File

@ -567,8 +567,7 @@ CodeGenFunction::GenerateOpenMPCapturedStmtFunction(const CapturedStmt &S) {
const CapturedDecl *CD = S.getCapturedDecl();
// Build the argument list.
bool NeedWrapperFunction =
getDebugInfo() &&
CGM.getCodeGenOpts().getDebugInfo() >= codegenoptions::LimitedDebugInfo;
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;

2
clang/lib/CodeGen/CodeGenFunction.cpp
View File

@ -2110,7 +2110,7 @@ void CodeGenFunction::EmitDeclRefExprDbgValue(const DeclRefExpr *E,
const APValue &Init) {
assert(Init.hasValue() && "Invalid DeclRefExpr initializer!");
if (CGDebugInfo *Dbg = getDebugInfo())
if (CGM.getCodeGenOpts().getDebugInfo() >= codegenoptions::LimitedDebugInfo)
if (CGM.getCodeGenOpts().hasReducedDebugInfo())
Dbg->EmitGlobalVariable(E->getDecl(), Init);
}

6
clang/lib/CodeGen/CodeGenModule.cpp
View File

@ -4118,13 +4118,13 @@ void CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D,
// Emit global variable debug information.
if (CGDebugInfo *DI = getModuleDebugInfo())
if (getCodeGenOpts().getDebugInfo() >= codegenoptions::LimitedDebugInfo)
if (getCodeGenOpts().hasReducedDebugInfo())
DI->EmitGlobalVariable(GV, D);
}
void CodeGenModule::EmitExternalVarDeclaration(const VarDecl *D) {
if (CGDebugInfo *DI = getModuleDebugInfo())
if (getCodeGenOpts().getDebugInfo() >= codegenoptions::LimitedDebugInfo) {
if (getCodeGenOpts().hasReducedDebugInfo()) {
QualType ASTTy = D->getType();
llvm::Type *Ty = getTypes().ConvertTypeForMem(D->getType());
llvm::PointerType *PTy =
@ -5371,7 +5371,7 @@ void CodeGenModule::EmitTopLevelDecl(Decl *D) {
ObjCRuntime->GenerateClass(OMD);
// Emit global variable debug information.
if (CGDebugInfo *DI = getModuleDebugInfo())
if (getCodeGenOpts().getDebugInfo() >= codegenoptions::LimitedDebugInfo)
if (getCodeGenOpts().hasReducedDebugInfo())
DI->getOrCreateInterfaceType(getContext().getObjCInterfaceType(
OMD->getClassInterface()), OMD->getLocation());
break;

3
clang/lib/Driver/ToolChains/Clang.cpp
View File

@ -999,6 +999,9 @@ static void RenderDebugEnablingArgs(const ArgList &Args, ArgStringList &CmdArgs,
case codegenoptions::DebugLineTablesOnly:
CmdArgs.push_back("-debug-info-kind=line-tables-only");
break;
case codegenoptions::DebugInfoConstructor:
CmdArgs.push_back("-debug-info-kind=constructor");
break;
case codegenoptions::LimitedDebugInfo:
CmdArgs.push_back("-debug-info-kind=limited");
break;

4
clang/lib/Frontend/CompilerInvocation.cpp
View File

@ -731,6 +731,7 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
llvm::StringSwitch<unsigned>(A->getValue())
.Case("line-tables-only", codegenoptions::DebugLineTablesOnly)
.Case("line-directives-only", codegenoptions::DebugDirectivesOnly)
.Case("constructor", codegenoptions::DebugInfoConstructor)
.Case("limited", codegenoptions::LimitedDebugInfo)
.Case("standalone", codegenoptions::FullDebugInfo)
.Default(~0U);
@ -787,8 +788,7 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
llvm::Triple::arm, llvm::Triple::armeb};
llvm::Triple T(TargetOpts.Triple);
if (Opts.OptimizationLevel > 0 &&
Opts.getDebugInfo() >= codegenoptions::LimitedDebugInfo &&
if (Opts.OptimizationLevel > 0 && Opts.hasReducedDebugInfo() &&
llvm::is_contained(DebugEntryValueArchs, T.getArch()))
Opts.EnableDebugEntryValues = Args.hasArg(OPT_femit_debug_entry_values);