r214752 - Add coverage mapping generation.
David Blaikie
dblaikie at gmail.com
Mon Aug 4 12:11:08 PDT 2014
Ah, sorry - thanks :)
On Mon, Aug 4, 2014 at 12:10 PM, Alex L <arphaman at gmail.com> wrote:
> I actually fixed it in r214757, now there are two :)
> I will revert mine
>
>
> 2014-08-04 12:08 GMT-07:00 David Blaikie <dblaikie at gmail.com>:
>>
>> CMake build fixed in r214758
>>
>> On Mon, Aug 4, 2014 at 11:41 AM, Alex Lorenz <arphaman at gmail.com> wrote:
>> > Author: arphaman
>> > Date: Mon Aug 4 13:41:51 2014
>> > New Revision: 214752
>> >
>> > URL: http://llvm.org/viewvc/llvm-project?rev=214752&view=rev
>> > Log:
>> > Add coverage mapping generation.
>> >
>> > This patch adds the '-fcoverage-mapping' option which
>> > allows clang to generate the coverage mapping information
>> > that can be used to provide code coverage analysis using
>> > the execution counts obtained from the instrumentation
>> > based profiling (-fprofile-instr-generate).
>> >
>> > Added:
>> > cfe/trunk/lib/CodeGen/CoverageMappingGen.cpp
>> > cfe/trunk/lib/CodeGen/CoverageMappingGen.h
>> > Modified:
>> > cfe/trunk/include/clang/CodeGen/CodeGenABITypes.h
>> > cfe/trunk/include/clang/CodeGen/ModuleBuilder.h
>> > cfe/trunk/include/clang/Driver/Options.td
>> > cfe/trunk/include/clang/Frontend/CodeGenOptions.def
>> > cfe/trunk/lib/CodeGen/CodeGenABITypes.cpp
>> > cfe/trunk/lib/CodeGen/CodeGenAction.cpp
>> > cfe/trunk/lib/CodeGen/CodeGenFunction.cpp
>> > cfe/trunk/lib/CodeGen/CodeGenModule.cpp
>> > cfe/trunk/lib/CodeGen/CodeGenModule.h
>> > cfe/trunk/lib/CodeGen/CodeGenPGO.cpp
>> > cfe/trunk/lib/CodeGen/CodeGenPGO.h
>> > cfe/trunk/lib/CodeGen/ModuleBuilder.cpp
>> > cfe/trunk/lib/Driver/Tools.cpp
>> > cfe/trunk/lib/Frontend/CompilerInvocation.cpp
>> >
>> > Modified: cfe/trunk/include/clang/CodeGen/CodeGenABITypes.h
>> > URL:
>> > http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/CodeGen/CodeGenABITypes.h?rev=214752&r1=214751&r2=214752&view=diff
>> >
>> > ==============================================================================
>> > --- cfe/trunk/include/clang/CodeGen/CodeGenABITypes.h (original)
>> > +++ cfe/trunk/include/clang/CodeGen/CodeGenABITypes.h Mon Aug 4
>> > 13:41:51 2014
>> > @@ -39,6 +39,7 @@ class CXXRecordDecl;
>> > class CodeGenOptions;
>> > class DiagnosticsEngine;
>> > class ObjCMethodDecl;
>> > +class CoverageSourceInfo;
>> >
>> > namespace CodeGen {
>> > class CGFunctionInfo;
>> > @@ -47,7 +48,8 @@ class CodeGenModule;
>> > class CodeGenABITypes
>> > {
>> > public:
>> > - CodeGenABITypes(ASTContext &C, llvm::Module &M, const
>> > llvm::DataLayout &TD);
>> > + CodeGenABITypes(ASTContext &C, llvm::Module &M, const
>> > llvm::DataLayout &TD,
>> > + CoverageSourceInfo *CoverageInfo = nullptr);
>> > ~CodeGenABITypes();
>> >
>> > /// These methods all forward to methods in the private
>> > implementation class
>> >
>> > Modified: cfe/trunk/include/clang/CodeGen/ModuleBuilder.h
>> > URL:
>> > http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/CodeGen/ModuleBuilder.h?rev=214752&r1=214751&r2=214752&view=diff
>> >
>> > ==============================================================================
>> > --- cfe/trunk/include/clang/CodeGen/ModuleBuilder.h (original)
>> > +++ cfe/trunk/include/clang/CodeGen/ModuleBuilder.h Mon Aug 4 13:41:51
>> > 2014
>> > @@ -24,6 +24,7 @@ namespace llvm {
>> >
>> > namespace clang {
>> > class DiagnosticsEngine;
>> > + class CoverageSourceInfo;
>> > class LangOptions;
>> > class CodeGenOptions;
>> > class TargetOptions;
>> > @@ -44,7 +45,8 @@ namespace clang {
>> > const std::string &ModuleName,
>> > const CodeGenOptions &CGO,
>> > const TargetOptions &TO,
>> > - llvm::LLVMContext& C);
>> > + llvm::LLVMContext& C,
>> > + CoverageSourceInfo *CoverageInfo =
>> > nullptr);
>> > }
>> >
>> > #endif
>> >
>> > Modified: cfe/trunk/include/clang/Driver/Options.td
>> > URL:
>> > http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/Options.td?rev=214752&r1=214751&r2=214752&view=diff
>> >
>> > ==============================================================================
>> > --- cfe/trunk/include/clang/Driver/Options.td (original)
>> > +++ cfe/trunk/include/clang/Driver/Options.td Mon Aug 4 13:41:51 2014
>> > @@ -408,6 +408,9 @@ def fprofile_instr_use : Flag<["-"], "fp
>> > def fprofile_instr_use_EQ : Joined<["-"], "fprofile-instr-use=">,
>> > Group<f_Group>, Flags<[CC1Option]>,
>> > HelpText<"Use instrumentation data for profile-guided
>> > optimization">;
>> > +def fcoverage_mapping : Flag<["-"], "fcoverage-mapping">,
>> > + Group<f_Group>, Flags<[CC1Option]>,
>> > + HelpText<"Generate coverage mapping to enable code coverage
>> > analysis">;
>> >
>> > def fblocks : Flag<["-"], "fblocks">, Group<f_Group>,
>> > Flags<[CC1Option]>,
>> > HelpText<"Enable the 'blocks' language feature">;
>> >
>> > Modified: cfe/trunk/include/clang/Frontend/CodeGenOptions.def
>> > URL:
>> > http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Frontend/CodeGenOptions.def?rev=214752&r1=214751&r2=214752&view=diff
>> >
>> > ==============================================================================
>> > --- cfe/trunk/include/clang/Frontend/CodeGenOptions.def (original)
>> > +++ cfe/trunk/include/clang/Frontend/CodeGenOptions.def Mon Aug 4
>> > 13:41:51 2014
>> > @@ -88,6 +88,8 @@ VALUE_CODEGENOPT(OptimizeSize, 2, 0) ///
>> >
>> > CODEGENOPT(ProfileInstrGenerate , 1, 0) ///< Instrument code to
>> > generate
>> > ///< execution counts to use
>> > with PGO.
>> > +CODEGENOPT(CoverageMapping , 1, 0) ///< Generate coverage mapping
>> > regions to
>> > + ///< enable code coverage analysis.
>> >
>> > /// If -fpcc-struct-return or -freg-struct-return is specified.
>> > ENUM_CODEGENOPT(StructReturnConvention, StructReturnConventionKind, 2,
>> > SRCK_Default)
>> >
>> > Modified: cfe/trunk/lib/CodeGen/CodeGenABITypes.cpp
>> > URL:
>> > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenABITypes.cpp?rev=214752&r1=214751&r2=214752&view=diff
>> >
>> > ==============================================================================
>> > --- cfe/trunk/lib/CodeGen/CodeGenABITypes.cpp (original)
>> > +++ cfe/trunk/lib/CodeGen/CodeGenABITypes.cpp Mon Aug 4 13:41:51 2014
>> > @@ -26,9 +26,11 @@ using namespace CodeGen;
>> >
>> > CodeGenABITypes::CodeGenABITypes(ASTContext &C,
>> > llvm::Module &M,
>> > - const llvm::DataLayout &TD)
>> > + const llvm::DataLayout &TD,
>> > + CoverageSourceInfo *CoverageInfo)
>> > : CGO(new CodeGenOptions),
>> > - CGM(new CodeGen::CodeGenModule(C, *CGO, M, TD, C.getDiagnostics()))
>> > {
>> > + CGM(new CodeGen::CodeGenModule(C, *CGO, M, TD, C.getDiagnostics(),
>> > + CoverageInfo)) {
>> > }
>> >
>> > CodeGenABITypes::~CodeGenABITypes()
>> >
>> > Modified: cfe/trunk/lib/CodeGen/CodeGenAction.cpp
>> > URL:
>> > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenAction.cpp?rev=214752&r1=214751&r2=214752&view=diff
>> >
>> > ==============================================================================
>> > --- cfe/trunk/lib/CodeGen/CodeGenAction.cpp (original)
>> > +++ cfe/trunk/lib/CodeGen/CodeGenAction.cpp Mon Aug 4 13:41:51 2014
>> > @@ -7,6 +7,7 @@
>> > //
>> >
>> > //===----------------------------------------------------------------------===//
>> >
>> > +#include "CoverageMappingGen.h"
>> > #include "clang/CodeGen/CodeGenAction.h"
>> > #include "clang/AST/ASTConsumer.h"
>> > #include "clang/AST/ASTContext.h"
>> > @@ -15,6 +16,7 @@
>> > #include "clang/Basic/FileManager.h"
>> > #include "clang/Basic/SourceManager.h"
>> > #include "clang/Basic/TargetInfo.h"
>> > +#include "clang/Lex/Preprocessor.h"
>> > #include "clang/CodeGen/BackendUtil.h"
>> > #include "clang/CodeGen/ModuleBuilder.h"
>> > #include "clang/Frontend/CompilerInstance.h"
>> > @@ -59,11 +61,13 @@ namespace clang {
>> > const TargetOptions &targetopts,
>> > const LangOptions &langopts, bool TimePasses,
>> > const std::string &infile, llvm::Module
>> > *LinkModule,
>> > - raw_ostream *OS, LLVMContext &C)
>> > + raw_ostream *OS, LLVMContext &C,
>> > + CoverageSourceInfo *CoverageInfo = nullptr)
>> > : Diags(_Diags), Action(action), CodeGenOpts(compopts),
>> > TargetOpts(targetopts), LangOpts(langopts), AsmOutStream(OS),
>> > Context(), LLVMIRGeneration("LLVM IR Generation Time"),
>> > - Gen(CreateLLVMCodeGen(Diags, infile, compopts, targetopts,
>> > C)),
>> > + Gen(CreateLLVMCodeGen(Diags, infile, compopts,
>> > + targetopts, C, CoverageInfo)),
>> > LinkModule(LinkModule) {
>> > llvm::TimePassesIsEnabled = TimePasses;
>> > }
>> > @@ -636,10 +640,17 @@ ASTConsumer *CodeGenAction::CreateASTCon
>> > LinkModuleToUse = ModuleOrErr.get();
>> > }
>> >
>> > + CoverageSourceInfo *CoverageInfo = nullptr;
>> > + // Add the preprocessor callback only when the coverage mapping is
>> > generated.
>> > + if (CI.getCodeGenOpts().CoverageMapping) {
>> > + CoverageInfo = new CoverageSourceInfo;
>> > + CI.getPreprocessor().addPPCallbacks(CoverageInfo);
>> > + }
>> > BEConsumer = new BackendConsumer(BA, CI.getDiagnostics(),
>> > CI.getCodeGenOpts(),
>> > CI.getTargetOpts(),
>> > CI.getLangOpts(),
>> > CI.getFrontendOpts().ShowTimers,
>> > InFile,
>> > - LinkModuleToUse, OS.release(),
>> > *VMContext);
>> > + LinkModuleToUse, OS.release(),
>> > *VMContext,
>> > + CoverageInfo);
>> > return BEConsumer;
>> > }
>> >
>> >
>> > Modified: cfe/trunk/lib/CodeGen/CodeGenFunction.cpp
>> > URL:
>> > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenFunction.cpp?rev=214752&r1=214751&r2=214752&view=diff
>> >
>> > ==============================================================================
>> > --- cfe/trunk/lib/CodeGen/CodeGenFunction.cpp (original)
>> > +++ cfe/trunk/lib/CodeGen/CodeGenFunction.cpp Mon Aug 4 13:41:51 2014
>> > @@ -829,6 +829,7 @@ void CodeGenFunction::GenerateCode(Globa
>> > StartFunction(GD, ResTy, Fn, FnInfo, Args, Loc,
>> > BodyRange.getBegin());
>> >
>> > // Generate the body of the function.
>> > + PGO.checkGlobalDecl(GD);
>> > PGO.assignRegionCounters(GD.getDecl(), CurFn);
>> > if (isa<CXXDestructorDecl>(FD))
>> > EmitDestructorBody(Args);
>> >
>> > Modified: cfe/trunk/lib/CodeGen/CodeGenModule.cpp
>> > URL:
>> > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenModule.cpp?rev=214752&r1=214751&r2=214752&view=diff
>> >
>> > ==============================================================================
>> > --- cfe/trunk/lib/CodeGen/CodeGenModule.cpp (original)
>> > +++ cfe/trunk/lib/CodeGen/CodeGenModule.cpp Mon Aug 4 13:41:51 2014
>> > @@ -21,6 +21,7 @@
>> > #include "CGOpenMPRuntime.h"
>> > #include "CodeGenFunction.h"
>> > #include "CodeGenPGO.h"
>> > +#include "CoverageMappingGen.h"
>> > #include "CodeGenTBAA.h"
>> > #include "TargetInfo.h"
>> > #include "clang/AST/ASTContext.h"
>> > @@ -74,7 +75,8 @@ static CGCXXABI *createCXXABI(CodeGenMod
>> >
>> > CodeGenModule::CodeGenModule(ASTContext &C, const CodeGenOptions &CGO,
>> > llvm::Module &M, const llvm::DataLayout
>> > &TD,
>> > - DiagnosticsEngine &diags)
>> > + DiagnosticsEngine &diags,
>> > + CoverageSourceInfo *CoverageInfo)
>> > : Context(C), LangOpts(C.getLangOpts()), CodeGenOpts(CGO),
>> > TheModule(M),
>> > Diags(diags), TheDataLayout(TD), Target(C.getTargetInfo()),
>> > ABI(createCXXABI(*this)), VMContext(M.getContext()),
>> > TBAA(nullptr),
>> > @@ -146,6 +148,11 @@ CodeGenModule::CodeGenModule(ASTContext
>> > getDiags().Report(DiagID) << EC.message();
>> > }
>> > }
>> > +
>> > + // If coverage mapping generation is enabled, create the
>> > + // CoverageMappingModuleGen object.
>> > + if (CodeGenOpts.CoverageMapping)
>> > + CoverageMapping.reset(new CoverageMappingModuleGen(*this,
>> > *CoverageInfo));
>> > }
>> >
>> > CodeGenModule::~CodeGenModule() {
>> > @@ -344,6 +351,9 @@ void CodeGenModule::Release() {
>> > EmitCtorList(GlobalDtors, "llvm.global_dtors");
>> > EmitGlobalAnnotations();
>> > EmitStaticExternCAliases();
>> > + EmitDeferredUnusedCoverageMappings();
>> > + if (CoverageMapping)
>> > + CoverageMapping->emit();
>> > emitLLVMUsed();
>> >
>> > if (CodeGenOpts.Autolink &&
>> > @@ -2989,6 +2999,9 @@ void CodeGenModule::EmitTopLevelDecl(Dec
>> > return;
>> >
>> > EmitGlobal(cast<FunctionDecl>(D));
>> > + // Always provide some coverage mapping
>> > + // even for the functions that aren't emitted.
>> > + AddDeferredUnusedCoverageMapping(D);
>> > break;
>> >
>> > case Decl::Var:
>> > @@ -3138,6 +3151,80 @@ void CodeGenModule::EmitTopLevelDecl(Dec
>> > }
>> > }
>> >
>> > +void CodeGenModule::AddDeferredUnusedCoverageMapping(Decl *D) {
>> > + // Do we need to generate coverage mapping?
>> > + if (!CodeGenOpts.CoverageMapping)
>> > + return;
>> > + switch (D->getKind()) {
>> > + case Decl::CXXConversion:
>> > + case Decl::CXXMethod:
>> > + case Decl::Function:
>> > + case Decl::ObjCMethod:
>> > + case Decl::CXXConstructor:
>> > + case Decl::CXXDestructor: {
>> > + if (!cast<FunctionDecl>(D)->hasBody())
>> > + return;
>> > + auto I = DeferredEmptyCoverageMappingDecls.find(D);
>> > + if (I == DeferredEmptyCoverageMappingDecls.end())
>> > + DeferredEmptyCoverageMappingDecls[D] = true;
>> > + break;
>> > + }
>> > + default:
>> > + break;
>> > + };
>> > +}
>> > +
>> > +void CodeGenModule::ClearUnusedCoverageMapping(const Decl *D) {
>> > + // Do we need to generate coverage mapping?
>> > + if (!CodeGenOpts.CoverageMapping)
>> > + return;
>> > + if (const auto *Fn = dyn_cast<FunctionDecl>(D)) {
>> > + if (Fn->isTemplateInstantiation())
>> > +
>> > ClearUnusedCoverageMapping(Fn->getTemplateInstantiationPattern());
>> > + }
>> > + auto I = DeferredEmptyCoverageMappingDecls.find(D);
>> > + if (I == DeferredEmptyCoverageMappingDecls.end())
>> > + DeferredEmptyCoverageMappingDecls[D] = false;
>> > + else
>> > + I->second = false;
>> > +}
>> > +
>> > +void CodeGenModule::EmitDeferredUnusedCoverageMappings() {
>> > + for (const auto I : DeferredEmptyCoverageMappingDecls) {
>> > + if (!I.second)
>> > + continue;
>> > + const auto *D = I.first;
>> > + switch (D->getKind()) {
>> > + case Decl::CXXConversion:
>> > + case Decl::CXXMethod:
>> > + case Decl::Function:
>> > + case Decl::ObjCMethod: {
>> > + CodeGenPGO PGO(*this);
>> > + GlobalDecl GD(cast<FunctionDecl>(D));
>> > + PGO.emitEmptyCounterMapping(D, getMangledName(GD),
>> > + getFunctionLinkage(GD));
>> > + break;
>> > + }
>> > + case Decl::CXXConstructor: {
>> > + CodeGenPGO PGO(*this);
>> > + GlobalDecl GD(cast<CXXConstructorDecl>(D), Ctor_Base);
>> > + PGO.emitEmptyCounterMapping(D, getMangledName(GD),
>> > + getFunctionLinkage(GD));
>> > + break;
>> > + }
>> > + case Decl::CXXDestructor: {
>> > + CodeGenPGO PGO(*this);
>> > + GlobalDecl GD(cast<CXXDestructorDecl>(D), Dtor_Base);
>> > + PGO.emitEmptyCounterMapping(D, getMangledName(GD),
>> > + getFunctionLinkage(GD));
>> > + break;
>> > + }
>> > + default:
>> > + break;
>> > + };
>> > + }
>> > +}
>> > +
>> > /// Turns the given pointer into a constant.
>> > static llvm::Constant *GetPointerConstant(llvm::LLVMContext &Context,
>> > const void *Ptr) {
>> >
>> > Modified: cfe/trunk/lib/CodeGen/CodeGenModule.h
>> > URL:
>> > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenModule.h?rev=214752&r1=214751&r2=214752&view=diff
>> >
>> > ==============================================================================
>> > --- cfe/trunk/lib/CodeGen/CodeGenModule.h (original)
>> > +++ cfe/trunk/lib/CodeGen/CodeGenModule.h Mon Aug 4 13:41:51 2014
>> > @@ -73,6 +73,7 @@ class DiagnosticsEngine;
>> > class AnnotateAttr;
>> > class CXXDestructorDecl;
>> > class Module;
>> > +class CoverageSourceInfo;
>> >
>> > namespace CodeGen {
>> >
>> > @@ -87,6 +88,7 @@ class CGOpenMPRuntime;
>> > class CGCUDARuntime;
>> > class BlockFieldFlags;
>> > class FunctionArgList;
>> > +class CoverageMappingModuleGen;
>> >
>> > struct OrderGlobalInits {
>> > unsigned int priority;
>> > @@ -477,10 +479,15 @@ class CodeGenModule : public CodeGenType
>> > std::unique_ptr<SanitizerMetadata> SanitizerMD;
>> >
>> > /// @}
>> > +
>> > + llvm::DenseMap<const Decl *, bool> DeferredEmptyCoverageMappingDecls;
>> > +
>> > + std::unique_ptr<CoverageMappingModuleGen> CoverageMapping;
>> > public:
>> > CodeGenModule(ASTContext &C, const CodeGenOptions &CodeGenOpts,
>> > llvm::Module &M, const llvm::DataLayout &TD,
>> > - DiagnosticsEngine &Diags);
>> > + DiagnosticsEngine &Diags,
>> > + CoverageSourceInfo *CoverageInfo = nullptr);
>> >
>> > ~CodeGenModule();
>> >
>> > @@ -529,6 +536,10 @@ public:
>> > InstrProfStats &getPGOStats() { return PGOStats; }
>> > llvm::IndexedInstrProfReader *getPGOReader() const { return
>> > PGOReader.get(); }
>> >
>> > + CoverageMappingModuleGen *getCoverageMapping() const {
>> > + return CoverageMapping.get();
>> > + }
>> > +
>> > llvm::Constant *getStaticLocalDeclAddress(const VarDecl *D) {
>> > return StaticLocalDeclMap[D];
>> > }
>> > @@ -815,6 +826,18 @@ public:
>> > /// Emit code for a single top level declaration.
>> > void EmitTopLevelDecl(Decl *D);
>> >
>> > + /// \brief Stored a deferred empty coverage mapping for an unused
>> > + /// and thus uninstrumented top level declaration.
>> > + void AddDeferredUnusedCoverageMapping(Decl *D);
>> > +
>> > + /// \brief Remove the deferred empty coverage mapping as this
>> > + /// declaration is actually instrumented.
>> > + void ClearUnusedCoverageMapping(const Decl *D);
>> > +
>> > + /// \brief Emit all the deferred coverage mappings
>> > + /// for the uninstrumented functions.
>> > + void EmitDeferredUnusedCoverageMappings();
>> > +
>> > /// Tell the consumer that this variable has been instantiated.
>> > void HandleCXXStaticMemberVarInstantiation(VarDecl *VD);
>> >
>> >
>> > Modified: cfe/trunk/lib/CodeGen/CodeGenPGO.cpp
>> > URL:
>> > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenPGO.cpp?rev=214752&r1=214751&r2=214752&view=diff
>> >
>> > ==============================================================================
>> > --- cfe/trunk/lib/CodeGen/CodeGenPGO.cpp (original)
>> > +++ cfe/trunk/lib/CodeGen/CodeGenPGO.cpp Mon Aug 4 13:41:51 2014
>> > @@ -13,6 +13,7 @@
>> >
>> > #include "CodeGenPGO.h"
>> > #include "CodeGenFunction.h"
>> > +#include "CoverageMappingGen.h"
>> > #include "clang/AST/RecursiveASTVisitor.h"
>> > #include "clang/AST/StmtVisitor.h"
>> > #include "llvm/IR/MDBuilder.h"
>> > @@ -24,8 +25,9 @@
>> > using namespace clang;
>> > using namespace CodeGen;
>> >
>> > -void CodeGenPGO::setFuncName(llvm::Function *Fn) {
>> > - RawFuncName = Fn->getName();
>> > +void CodeGenPGO::setFuncName(StringRef Name,
>> > + llvm::GlobalValue::LinkageTypes Linkage) {
>> > + RawFuncName = Name;
>> >
>> > // Function names may be prefixed with a binary '1' to indicate
>> > // that the backend should not modify the symbols due to any platform
>> > @@ -33,7 +35,7 @@ void CodeGenPGO::setFuncName(llvm::Funct
>> > if (RawFuncName[0] == '\1')
>> > RawFuncName = RawFuncName.substr(1);
>> >
>> > - if (!Fn->hasLocalLinkage()) {
>> > + if (!llvm::GlobalValue::isLocalLinkage(Linkage)) {
>> > PrefixedFuncName.reset(new std::string(RawFuncName));
>> > return;
>> > }
>> > @@ -49,6 +51,27 @@ void CodeGenPGO::setFuncName(llvm::Funct
>> > PrefixedFuncName->append(RawFuncName);
>> > }
>> >
>> > +void CodeGenPGO::setFuncName(llvm::Function *Fn) {
>> > + setFuncName(Fn->getName(), Fn->getLinkage());
>> > +}
>> > +
>> > +void CodeGenPGO::setVarLinkage(llvm::GlobalValue::LinkageTypes Linkage)
>> > {
>> > + // Set the linkage for variables based on the function linkage.
>> > Usually, we
>> > + // want to match it, but available_externally and extern_weak both
>> > have the
>> > + // wrong semantics.
>> > + VarLinkage = Linkage;
>> > + switch (VarLinkage) {
>> > + case llvm::GlobalValue::ExternalWeakLinkage:
>> > + VarLinkage = llvm::GlobalValue::LinkOnceAnyLinkage;
>> > + break;
>> > + case llvm::GlobalValue::AvailableExternallyLinkage:
>> > + VarLinkage = llvm::GlobalValue::LinkOnceODRLinkage;
>> > + break;
>> > + default:
>> > + break;
>> > + }
>> > +}
>> > +
>> > static llvm::Function *getRegisterFunc(CodeGenModule &CGM) {
>> > return
>> > CGM.getModule().getFunction("__llvm_profile_register_functions");
>> > }
>> > @@ -120,37 +143,48 @@ llvm::GlobalVariable *CodeGenPGO::buildD
>> > auto *Int64Ty = llvm::Type::getInt64Ty(Ctx);
>> > auto *Int8PtrTy = llvm::Type::getInt8PtrTy(Ctx);
>> > auto *Int64PtrTy = llvm::Type::getInt64PtrTy(Ctx);
>> > - llvm::Type *DataTypes[] = {
>> > - Int32Ty, Int32Ty, Int64Ty, Int8PtrTy, Int64PtrTy
>> > - };
>> > - auto *DataTy = llvm::StructType::get(Ctx, makeArrayRef(DataTypes));
>> > - llvm::Constant *DataVals[] = {
>> > - llvm::ConstantInt::get(Int32Ty, getFuncName().size()),
>> > - llvm::ConstantInt::get(Int32Ty, NumRegionCounters),
>> > - llvm::ConstantInt::get(Int64Ty, FunctionHash),
>> > - llvm::ConstantExpr::getBitCast(Name, Int8PtrTy),
>> > - llvm::ConstantExpr::getBitCast(RegionCounters, Int64PtrTy)
>> > - };
>> > - auto *Data =
>> > - new llvm::GlobalVariable(CGM.getModule(), DataTy, true, VarLinkage,
>> > - llvm::ConstantStruct::get(DataTy,
>> > DataVals),
>> > - getFuncVarName("data"));
>> > -
>> > - // All the data should be packed into an array in its own section.
>> > - Data->setSection(getDataSection(CGM));
>> > - Data->setAlignment(8);
>> > + llvm::GlobalVariable *Data = nullptr;
>> > + if (RegionCounters) {
>> > + llvm::Type *DataTypes[] = {
>> > + Int32Ty, Int32Ty, Int64Ty, Int8PtrTy, Int64PtrTy
>> > + };
>> > + auto *DataTy = llvm::StructType::get(Ctx, makeArrayRef(DataTypes));
>> > + llvm::Constant *DataVals[] = {
>> > + llvm::ConstantInt::get(Int32Ty, getFuncName().size()),
>> > + llvm::ConstantInt::get(Int32Ty, NumRegionCounters),
>> > + llvm::ConstantInt::get(Int64Ty, FunctionHash),
>> > + llvm::ConstantExpr::getBitCast(Name, Int8PtrTy),
>> > + llvm::ConstantExpr::getBitCast(RegionCounters, Int64PtrTy)
>> > + };
>> > + Data =
>> > + new llvm::GlobalVariable(CGM.getModule(), DataTy, true,
>> > VarLinkage,
>> > + llvm::ConstantStruct::get(DataTy,
>> > DataVals),
>> > + getFuncVarName("data"));
>> > +
>> > + // All the data should be packed into an array in its own section.
>> > + Data->setSection(getDataSection(CGM));
>> > + Data->setAlignment(8);
>> > + }
>> > +
>> > + // Create coverage mapping data variable.
>> > + if (!CoverageMapping.empty())
>> > + CGM.getCoverageMapping()->addFunctionMappingRecord(Name,
>> > +
>> > getFuncName().size(),
>> > +
>> > CoverageMapping);
>> >
>> > // Hide all these symbols so that we correctly get a copy for each
>> > // executable. The profile format expects names and counters to be
>> > // contiguous, so references into shared objects would be invalid.
>> > if (!llvm::GlobalValue::isLocalLinkage(VarLinkage)) {
>> > Name->setVisibility(llvm::GlobalValue::HiddenVisibility);
>> > - Data->setVisibility(llvm::GlobalValue::HiddenVisibility);
>> > - RegionCounters->setVisibility(llvm::GlobalValue::HiddenVisibility);
>> > + if (Data) {
>> > + Data->setVisibility(llvm::GlobalValue::HiddenVisibility);
>> > +
>> > RegionCounters->setVisibility(llvm::GlobalValue::HiddenVisibility);
>> > + }
>> > }
>> >
>> > // Make sure the data doesn't get deleted.
>> > - CGM.addUsedGlobal(Data);
>> > + if (Data) CGM.addUsedGlobal(Data);
>> > return Data;
>> > }
>> >
>> > @@ -807,6 +841,20 @@ static void emitRuntimeHook(CodeGenModul
>> > CGM.addUsedGlobal(User);
>> > }
>> >
>> > +void CodeGenPGO::checkGlobalDecl(GlobalDecl GD) {
>> > + // Make sure we only emit coverage mapping for one
>> > constructor/destructor.
>> > + // Clang emits several functions for the constructor and the
>> > destructor of
>> > + // a class. Every function is instrumented, but we only want to
>> > provide
>> > + // coverage for one of them. Because of that we only emit the
>> > coverage mapping
>> > + // for the base constructor/destructor.
>> > + if ((isa<CXXConstructorDecl>(GD.getDecl()) &&
>> > + GD.getCtorType() != Ctor_Base) ||
>> > + (isa<CXXDestructorDecl>(GD.getDecl()) &&
>> > + GD.getDtorType() != Dtor_Base)) {
>> > + SkipCoverageMapping = true;
>> > + }
>> > +}
>> > +
>> > void CodeGenPGO::assignRegionCounters(const Decl *D, llvm::Function
>> > *Fn) {
>> > bool InstrumentRegions = CGM.getCodeGenOpts().ProfileInstrGenerate;
>> > llvm::IndexedInstrProfReader *PGOReader = CGM.getPGOReader();
>> > @@ -814,27 +862,16 @@ void CodeGenPGO::assignRegionCounters(co
>> > return;
>> > if (D->isImplicit())
>> > return;
>> > + CGM.ClearUnusedCoverageMapping(D);
>> > setFuncName(Fn);
>> > -
>> > - // Set the linkage for variables based on the function linkage.
>> > Usually, we
>> > - // want to match it, but available_externally and extern_weak both
>> > have the
>> > - // wrong semantics.
>> > - VarLinkage = Fn->getLinkage();
>> > - switch (VarLinkage) {
>> > - case llvm::GlobalValue::ExternalWeakLinkage:
>> > - VarLinkage = llvm::GlobalValue::LinkOnceAnyLinkage;
>> > - break;
>> > - case llvm::GlobalValue::AvailableExternallyLinkage:
>> > - VarLinkage = llvm::GlobalValue::LinkOnceODRLinkage;
>> > - break;
>> > - default:
>> > - break;
>> > - }
>> > + setVarLinkage(Fn->getLinkage());
>> >
>> > mapRegionCounters(D);
>> > if (InstrumentRegions) {
>> > emitRuntimeHook(CGM);
>> > emitCounterVariables();
>> > + if (CGM.getCodeGenOpts().CoverageMapping)
>> > + emitCounterRegionMapping(D);
>> > }
>> > if (PGOReader) {
>> > SourceManager &SM = CGM.getContext().getSourceManager();
>> > @@ -860,6 +897,45 @@ void CodeGenPGO::mapRegionCounters(const
>> > FunctionHash = Walker.Hash.finalize();
>> > }
>> >
>> > +void CodeGenPGO::emitCounterRegionMapping(const Decl *D) {
>> > + if (SkipCoverageMapping)
>> > + return;
>> > + // Don't map the functions inside the system headers
>> > + auto Loc = D->getBody()->getLocStart();
>> > + if (CGM.getContext().getSourceManager().isInSystemHeader(Loc))
>> > + return;
>> > +
>> > + llvm::raw_string_ostream OS(CoverageMapping);
>> > + CoverageMappingGen MappingGen(*CGM.getCoverageMapping(),
>> > + CGM.getContext().getSourceManager(),
>> > + CGM.getLangOpts(),
>> > RegionCounterMap.get(),
>> > + NumRegionCounters);
>> > + MappingGen.emitCounterMapping(D, OS);
>> > + OS.flush();
>> > +}
>> > +
>> > +void
>> > +CodeGenPGO::emitEmptyCounterMapping(const Decl *D, StringRef FuncName,
>> > + llvm::GlobalValue::LinkageTypes
>> > Linkage) {
>> > + if (SkipCoverageMapping)
>> > + return;
>> > + setFuncName(FuncName, Linkage);
>> > + setVarLinkage(Linkage);
>> > +
>> > + // Don't map the functions inside the system headers
>> > + auto Loc = D->getBody()->getLocStart();
>> > + if (CGM.getContext().getSourceManager().isInSystemHeader(Loc))
>> > + return;
>> > +
>> > + llvm::raw_string_ostream OS(CoverageMapping);
>> > + CoverageMappingGen MappingGen(*CGM.getCoverageMapping(),
>> > + CGM.getContext().getSourceManager(),
>> > + CGM.getLangOpts());
>> > + MappingGen.emitEmptyMapping(D, OS);
>> > + OS.flush();
>> > + buildDataVar();
>> > +}
>> > +
>> > void CodeGenPGO::computeRegionCounts(const Decl *D) {
>> > StmtCountMap.reset(new llvm::DenseMap<const Stmt *, uint64_t>);
>> > ComputeRegionCounts Walker(*StmtCountMap, *this);
>> >
>> > Modified: cfe/trunk/lib/CodeGen/CodeGenPGO.h
>> > URL:
>> > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenPGO.h?rev=214752&r1=214751&r2=214752&view=diff
>> >
>> > ==============================================================================
>> > --- cfe/trunk/lib/CodeGen/CodeGenPGO.h (original)
>> > +++ cfe/trunk/lib/CodeGen/CodeGenPGO.h Mon Aug 4 13:41:51 2014
>> > @@ -42,11 +42,16 @@ private:
>> > std::unique_ptr<llvm::DenseMap<const Stmt *, uint64_t>> StmtCountMap;
>> > std::unique_ptr<std::vector<uint64_t>> RegionCounts;
>> > uint64_t CurrentRegionCount;
>> > + std::string CoverageMapping;
>> > + /// \brief A flag that is set to true when this function doesn't need
>> > + /// to have coverage mapping data.
>> > + bool SkipCoverageMapping;
>> >
>> > public:
>> > CodeGenPGO(CodeGenModule &CGM)
>> > : CGM(CGM), NumRegionCounters(0), FunctionHash(0),
>> > - RegionCounters(nullptr), CurrentRegionCount(0) {}
>> > + RegionCounters(nullptr), CurrentRegionCount(0),
>> > + SkipCoverageMapping(false) {}
>> >
>> > /// Whether or not we have PGO region data for the current function.
>> > This is
>> > /// false both when we have no data at all and when our data has been
>> > @@ -99,6 +104,8 @@ public:
>> > llvm::MDNode *createBranchWeights(ArrayRef<uint64_t> Weights);
>> > llvm::MDNode *createLoopWeights(const Stmt *Cond, RegionCounter
>> > &Cnt);
>> >
>> > + /// Check if we need to emit coverage mapping for a given declaration
>> > + void checkGlobalDecl(GlobalDecl GD);
>> > /// Assign counters to regions and configure them for PGO of a given
>> > /// function. Does nothing if instrumentation is not enabled and
>> > either
>> > /// generates global variables or associates PGO data with each of
>> > the
>> > @@ -111,9 +118,14 @@ public:
>> > void destroyRegionCounters();
>> > /// Emit static initialization code, if any.
>> > static llvm::Function *emitInitialization(CodeGenModule &CGM);
>> > -
>> > + /// Emit a coverage mapping range with a counter zero
>> > + /// for an unused declaration.
>> > + void emitEmptyCounterMapping(const Decl *D, StringRef FuncName,
>> > + llvm::GlobalValue::LinkageTypes
>> > Linkage);
>> > private:
>> > void setFuncName(llvm::Function *Fn);
>> > + void setFuncName(StringRef Name, llvm::GlobalValue::LinkageTypes
>> > Linkage);
>> > + void setVarLinkage(llvm::GlobalValue::LinkageTypes Linkage);
>> > void mapRegionCounters(const Decl *D);
>> > void computeRegionCounts(const Decl *D);
>> > void applyFunctionAttributes(llvm::IndexedInstrProfReader *PGOReader,
>> > @@ -122,6 +134,7 @@ private:
>> > bool IsInMainFile);
>> > void emitCounterVariables();
>> > llvm::GlobalVariable *buildDataVar();
>> > + void emitCounterRegionMapping(const Decl *D);
>> >
>> > /// Emit code to increment the counter at the given index
>> > void emitCounterIncrement(CGBuilderTy &Builder, unsigned Counter);
>> >
>> > Added: cfe/trunk/lib/CodeGen/CoverageMappingGen.cpp
>> > URL:
>> > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CoverageMappingGen.cpp?rev=214752&view=auto
>> >
>> > ==============================================================================
>> > --- cfe/trunk/lib/CodeGen/CoverageMappingGen.cpp (added)
>> > +++ cfe/trunk/lib/CodeGen/CoverageMappingGen.cpp Mon Aug 4 13:41:51
>> > 2014
>> > @@ -0,0 +1,1166 @@
>> > +//===--- CoverageMappingGen.cpp - Coverage mapping generation ---*- C++
>> > -*-===//
>> > +//
>> > +// The LLVM Compiler Infrastructure
>> > +//
>> > +// This file is distributed under the University of Illinois Open
>> > Source
>> > +// License. See LICENSE.TXT for details.
>> > +//
>> >
>> > +//===----------------------------------------------------------------------===//
>> > +//
>> > +// Instrumentation-based code coverage mapping generator
>> > +//
>> >
>> > +//===----------------------------------------------------------------------===//
>> > +
>> > +#include "CoverageMappingGen.h"
>> > +#include "CodeGenFunction.h"
>> > +#include "clang/AST/StmtVisitor.h"
>> > +#include "clang/Lex/Lexer.h"
>> > +#include "llvm/ProfileData/InstrProfReader.h"
>> > +#include "llvm/ProfileData/CoverageMapping.h"
>> > +#include "llvm/ProfileData/CoverageMappingWriter.h"
>> > +#include "llvm/Support/FileSystem.h"
>> > +
>> > +using namespace clang;
>> > +using namespace CodeGen;
>> > +using namespace llvm::coverage;
>> > +
>> > +void CoverageSourceInfo::SourceRangeSkipped(SourceRange Range) {
>> > + SkippedRanges.push_back(Range);
>> > +}
>> > +
>> > +namespace {
>> > +
>> > +/// \brief A region of source code that can be mapped to a counter.
>> > +struct SourceMappingRegion {
>> > + enum RegionFlags {
>> > + /// \brief This region won't be emitted if it wasn't extended.
>> > + /// This is useful so that we won't emit source ranges for single
>> > tokens
>> > + /// that we don't really care that much about, like:
>> > + /// the '(' token in #define MACRO (
>> > + IgnoreIfNotExtended = 0x0001,
>> > + };
>> > +
>> > + FileID File, MacroArgumentFile;
>> > +
>> > + Counter Count;
>> > +
>> > + /// \brief A statement that initiated the count of Zero.
>> > + ///
>> > + /// This initiator statement is useful to prevent merging of
>> > unreachable
>> > + /// regions with different statements that caused the counter to
>> > become
>> > + /// unreachable.
>> > + const Stmt *UnreachableInitiator;
>> > +
>> > + /// \brief A statement that separates certain mapping regions into
>> > groups.
>> > + ///
>> > + /// The group statement is sometimes useful when we are emitting the
>> > source
>> > + /// regions not in their correct lexical order, e.g. the regions for
>> > the
>> > + /// incrementation expression in the 'for' construct. By marking the
>> > regions
>> > + /// in the incrementation expression with the group statement, we
>> > avoid the
>> > + /// merging of the regions from the incrementation expression and the
>> > loop's
>> > + /// body.
>> > + const Stmt *Group;
>> > +
>> > + /// \brief The region's starting location.
>> > + SourceLocation LocStart;
>> > +
>> > + /// \brief The region's ending location.
>> > + SourceLocation LocEnd, AlternativeLocEnd;
>> > + unsigned Flags;
>> > + CounterMappingRegion::RegionKind Kind;
>> > +
>> > + SourceMappingRegion(FileID File, FileID MacroArgumentFile, Counter
>> > Count,
>> > + const Stmt *UnreachableInitiator, const Stmt
>> > *Group,
>> > + SourceLocation LocStart, SourceLocation LocEnd,
>> > + unsigned Flags = 0,
>> > + CounterMappingRegion::RegionKind Kind =
>> > + CounterMappingRegion::CodeRegion)
>> > + : File(File), MacroArgumentFile(MacroArgumentFile), Count(Count),
>> > + UnreachableInitiator(UnreachableInitiator), Group(Group),
>> > + LocStart(LocStart), LocEnd(LocEnd),
>> > AlternativeLocEnd(LocStart),
>> > + Flags(Flags), Kind(Kind) {}
>> > +
>> > + bool hasFlag(RegionFlags Flag) const { return (Flags & Flag) != 0; }
>> > +
>> > + void setFlag(RegionFlags Flag) { Flags |= Flag; }
>> > +
>> > + void clearFlag(RegionFlags Flag) { Flags &= ~Flag; }
>> > +
>> > + /// \brief Return true if two regions can be merged together.
>> > + bool isMergeable(SourceMappingRegion &R) {
>> > + return File == R.File && MacroArgumentFile == R.MacroArgumentFile
>> > &&
>> > + Count == R.Count && UnreachableInitiator ==
>> > R.UnreachableInitiator &&
>> > + Group == R.Group && Kind == R.Kind;
>> > + }
>> > +
>> > + /// \brief Merge two regions by extending the 'this' region to cover
>> > the
>> > + /// given region.
>> > + void mergeByExtendingTo(SourceMappingRegion &R) {
>> > + LocEnd = R.LocEnd;
>> > + AlternativeLocEnd = R.LocStart;
>> > + if (hasFlag(IgnoreIfNotExtended))
>> > + clearFlag(IgnoreIfNotExtended);
>> > + }
>> > +};
>> > +
>> > +/// \brief The state of the coverage mapping builder.
>> > +struct SourceMappingState {
>> > + Counter CurrentRegionCount;
>> > + const Stmt *CurrentSourceGroup;
>> > + const Stmt *CurrentUnreachableRegionInitiator;
>> > +
>> > + SourceMappingState(Counter CurrentRegionCount, const Stmt
>> > *CurrentSourceGroup,
>> > + const Stmt *CurrentUnreachableRegionInitiator)
>> > + : CurrentRegionCount(CurrentRegionCount),
>> > + CurrentSourceGroup(CurrentSourceGroup),
>> > +
>> > CurrentUnreachableRegionInitiator(CurrentUnreachableRegionInitiator) {}
>> > +};
>> > +
>> > +/// \brief Provides the common functionality for the different
>> > +/// coverage mapping region builders.
>> > +class CoverageMappingBuilder {
>> > +public:
>> > + CoverageMappingModuleGen &CVM;
>> > + SourceManager &SM;
>> > + const LangOptions &LangOpts;
>> > +
>> > +private:
>> > + struct FileInfo {
>> > + /// \brief The file id that will be used by the coverage mapping
>> > system.
>> > + unsigned CovMappingFileID;
>> > + const FileEntry *Entry;
>> > +
>> > + FileInfo(unsigned CovMappingFileID, const FileEntry *Entry)
>> > + : CovMappingFileID(CovMappingFileID), Entry(Entry) {}
>> > + };
>> > +
>> > + /// \brief This mapping maps clang's FileIDs to file ids used
>> > + /// by the coverage mapping system and clang's file entries.
>> > + llvm::SmallDenseMap<FileID, FileInfo, 8> FileIDMapping;
>> > +
>> > +public:
>> > + /// \brief The statement that corresponds to the current source
>> > group.
>> > + const Stmt *CurrentSourceGroup;
>> > +
>> > + /// \brief The statement the initiated the current unreachable
>> > region.
>> > + const Stmt *CurrentUnreachableRegionInitiator;
>> > +
>> > + /// \brief The coverage mapping regions for this function
>> > + llvm::SmallVector<CounterMappingRegion, 32> MappingRegions;
>> > + /// \brief The source mapping regions for this function.
>> > + llvm::SmallVector<SourceMappingRegion, 32> SourceRegions;
>> > +
>> > + CoverageMappingBuilder(CoverageMappingModuleGen &CVM, SourceManager
>> > &SM,
>> > + const LangOptions &LangOpts)
>> > + : CVM(CVM), SM(SM), LangOpts(LangOpts),
>> > + CurrentSourceGroup(nullptr),
>> > + CurrentUnreachableRegionInitiator(nullptr) {}
>> > +
>> > + /// \brief Return the precise end location for the given token.
>> > + SourceLocation getPreciseTokenLocEnd(SourceLocation Loc) {
>> > + return Lexer::getLocForEndOfToken(SM.getSpellingLoc(Loc), 0, SM,
>> > LangOpts);
>> > + }
>> > +
>> > + /// \brief Create the mapping that maps from the function's file ids
>> > to
>> > + /// the indices for the translation unit's filenames.
>> > + void createFileIDMapping(SmallVectorImpl<unsigned> &Mapping) {
>> > + Mapping.resize(FileIDMapping.size(), 0);
>> > + for (const auto &I : FileIDMapping)
>> > + Mapping[I.second.CovMappingFileID] =
>> > CVM.getFileID(I.second.Entry);
>> > + }
>> > +
>> > + /// \brief Get the coverage mapping file id that corresponds to the
>> > given
>> > + /// clang file id. If such file id doesn't exist, it gets added to
>> > the
>> > + /// mapping that maps from clang's file ids to coverage mapping file
>> > ids.
>> > + /// Return true if there was an error getting the coverage mapping
>> > file id.
>> > + /// An example of an when this function fails is when the region
>> > tries
>> > + /// to get a coverage file id for a location in a built-in macro.
>> > + bool getCoverageFileID(SourceLocation LocStart, FileID File,
>> > + FileID SpellingFile, unsigned &Result) {
>> > + auto Mapping = FileIDMapping.find(File);
>> > + if (Mapping != FileIDMapping.end()) {
>> > + Result = Mapping->second.CovMappingFileID;
>> > + return false;
>> > + }
>> > +
>> > + auto Entry = SM.getFileEntryForID(SpellingFile);
>> > + if (!Entry)
>> > + return true;
>> > +
>> > + Result = FileIDMapping.size();
>> > + FileIDMapping.insert(std::make_pair(File, FileInfo(Result,
>> > Entry)));
>> > + createFileExpansionRegion(LocStart, File);
>> > + return false;
>> > + }
>> > +
>> > + /// \brief Get the coverage mapping file id that corresponds to the
>> > given
>> > + /// clang file id.
>> > + /// Return true if there was an error getting the coverage mapping
>> > file id.
>> > + bool getExistingCoverageFileID(FileID File, unsigned &Result) {
>> > + // Make sure that the file is valid.
>> > + if (File.isInvalid())
>> > + return true;
>> > + auto Mapping = FileIDMapping.find(File);
>> > + if (Mapping != FileIDMapping.end()) {
>> > + Result = Mapping->second.CovMappingFileID;
>> > + return false;
>> > + }
>> > + return true;
>> > + }
>> > +
>> > + /// \brief Return true if the given clang's file id has a
>> > corresponding
>> > + /// coverage file id.
>> > + bool hasExistingCoverageFileID(FileID File) const {
>> > + return FileIDMapping.count(File);
>> > + }
>> > +
>> > + /// \brief Gather all the regions that were skipped by the
>> > preprocessor
>> > + /// using the constructs like #if.
>> > + void gatherSkippedRegions() {
>> > + /// An array of the minimum lineStarts and the maximum lineEnds
>> > + /// for mapping regions from the appropriate source files.
>> > + llvm::SmallVector<std::pair<unsigned, unsigned>, 8> FileLineRanges;
>> > + FileLineRanges.resize(
>> > + FileIDMapping.size(),
>> > + std::make_pair(std::numeric_limits<unsigned>::max(), 0));
>> > + for (const auto &R : MappingRegions) {
>> > + FileLineRanges[R.FileID].first =
>> > + std::min(FileLineRanges[R.FileID].first, R.LineStart);
>> > + FileLineRanges[R.FileID].second =
>> > + std::max(FileLineRanges[R.FileID].second, R.LineEnd);
>> > + }
>> > +
>> > + auto SkippedRanges = CVM.getSourceInfo().getSkippedRanges();
>> > + for (const auto &I : SkippedRanges) {
>> > + auto LocStart = I.getBegin();
>> > + auto LocEnd = I.getEnd();
>> > + auto FileStart = SM.getFileID(LocStart);
>> > + if (!hasExistingCoverageFileID(FileStart))
>> > + continue;
>> > + auto ActualFileStart =
>> > SM.getDecomposedSpellingLoc(LocStart).first;
>> > + if (ActualFileStart != SM.getDecomposedSpellingLoc(LocEnd).first)
>> > + // Ignore regions that span across multiple files.
>> > + continue;
>> > +
>> > + unsigned CovFileID;
>> > + if (getCoverageFileID(LocStart, FileStart, ActualFileStart,
>> > CovFileID))
>> > + continue;
>> > + unsigned LineStart = SM.getSpellingLineNumber(LocStart);
>> > + unsigned ColumnStart = SM.getSpellingColumnNumber(LocStart);
>> > + unsigned LineEnd = SM.getSpellingLineNumber(LocEnd);
>> > + unsigned ColumnEnd = SM.getSpellingColumnNumber(LocEnd);
>> > + CounterMappingRegion Region(Counter(), CovFileID, LineStart,
>> > ColumnStart,
>> > + LineEnd, ColumnEnd, false,
>> > + CounterMappingRegion::SkippedRegion);
>> > + // Make sure that we only collect the regions that are inside
>> > + // the souce code of this function.
>> > + if (Region.LineStart >= FileLineRanges[CovFileID].first &&
>> > + Region.LineEnd <= FileLineRanges[CovFileID].second)
>> > + MappingRegions.push_back(Region);
>> > + }
>> > + }
>> > +
>> > + /// \brief Create a mapping region that correponds to an expansion of
>> > + /// a macro or an embedded include.
>> > + void createFileExpansionRegion(SourceLocation Loc, FileID
>> > ExpandedFile) {
>> > + SourceLocation LocStart;
>> > + if (Loc.isMacroID())
>> > + LocStart = SM.getImmediateExpansionRange(Loc).first;
>> > + else {
>> > + LocStart = SM.getIncludeLoc(ExpandedFile);
>> > + if (LocStart.isInvalid())
>> > + return; // This file has no expansion region.
>> > + }
>> > +
>> > + auto File = SM.getFileID(LocStart);
>> > + auto SpellingFile = SM.getDecomposedSpellingLoc(LocStart).first;
>> > + unsigned CovFileID, ExpandedFileID;
>> > + if (getExistingCoverageFileID(ExpandedFile, ExpandedFileID))
>> > + return;
>> > + if (getCoverageFileID(LocStart, File, SpellingFile, CovFileID))
>> > + return;
>> > + unsigned LineStart = SM.getSpellingLineNumber(LocStart);
>> > + unsigned ColumnStart = SM.getSpellingColumnNumber(LocStart);
>> > + unsigned LineEnd = LineStart;
>> > + // Compute the end column manually as Lexer::getLocForEndOfToken
>> > doesn't
>> > + // give the correct result in all cases.
>> > + unsigned ColumnEnd =
>> > + ColumnStart +
>> > + Lexer::MeasureTokenLength(SM.getSpellingLoc(LocStart), SM,
>> > LangOpts);
>> > +
>> > + MappingRegions.push_back(CounterMappingRegion(
>> > + Counter(), CovFileID, LineStart, ColumnStart, LineEnd,
>> > ColumnEnd,
>> > + false, CounterMappingRegion::ExpansionRegion));
>> > + MappingRegions.back().ExpandedFileID = ExpandedFileID;
>> > + }
>> > +
>> > + /// \brief Enter a source region group that is identified by the
>> > given
>> > + /// statement.
>> > + /// It's not possible to enter a group when there is already
>> > + /// another group present.
>> > + void beginSourceRegionGroup(const Stmt *Group) {
>> > + assert(!CurrentSourceGroup);
>> > + CurrentSourceGroup = Group;
>> > + }
>> > +
>> > + /// \brief Exit the current source region group.
>> > + void endSourceRegionGroup() { CurrentSourceGroup = nullptr; }
>> > +
>> > + /// \brief Brings a region that has the same counter and file to the
>> > back
>> > + /// of the source regions array.
>> > + void bringSimilarRegionBack(Counter Count, FileID File,
>> > + FileID MacroArgumentFile,
>> > + const Stmt *UnreachableInitiator,
>> > + const Stmt *SourceGroup) {
>> > + for (size_t I = SourceRegions.size(); I != 0;) {
>> > + --I;
>> > + if (SourceRegions[I].Count == Count && SourceRegions[I].File ==
>> > File &&
>> > + SourceRegions[I].MacroArgumentFile == MacroArgumentFile &&
>> > + SourceRegions[I].UnreachableInitiator == UnreachableInitiator
>> > &&
>> > + SourceRegions[I].Group == SourceGroup) {
>> > + if (I != SourceRegions.size() - 1)
>> > + std::swap(SourceRegions[I], SourceRegions.back());
>> > + return;
>> > + }
>> > + }
>> > + }
>> > +
>> > + /// \brief Associate a counter with a given source code range.
>> > + void mapSourceCodeRange(SourceLocation LocStart, SourceLocation
>> > LocEnd,
>> > + Counter Count, const Stmt
>> > *UnreachableInitiator,
>> > + const Stmt *SourceGroup, unsigned Flags = 0,
>> > + FileID MacroArgumentFile = FileID()) {
>> > + if (SM.isMacroArgExpansion(LocStart)) {
>> > + // Map the code range with the macro argument's value.
>> > + mapSourceCodeRange(SM.getImmediateSpellingLoc(LocStart),
>> > + SM.getImmediateSpellingLoc(LocEnd), Count,
>> > + UnreachableInitiator, SourceGroup, Flags,
>> > + SM.getFileID(LocStart));
>> > + // Map the code range where the macro argument is referenced.
>> > + SourceLocation
>> > RefLocStart(SM.getImmediateExpansionRange(LocStart).first);
>> > + SourceLocation RefLocEnd(RefLocStart);
>> > + if (SM.isMacroArgExpansion(RefLocStart))
>> > + mapSourceCodeRange(RefLocStart, RefLocEnd, Count,
>> > UnreachableInitiator,
>> > + SourceGroup, 0, SM.getFileID(RefLocStart));
>> > + else
>> > + mapSourceCodeRange(RefLocStart, RefLocEnd, Count,
>> > UnreachableInitiator,
>> > + SourceGroup);
>> > + return;
>> > + }
>> > + auto File = SM.getFileID(LocStart);
>> > + // Make sure that the file id is valid.
>> > + if (File.isInvalid())
>> > + return;
>> > + bringSimilarRegionBack(Count, File, MacroArgumentFile,
>> > UnreachableInitiator,
>> > + SourceGroup);
>> > + SourceMappingRegion R(File, MacroArgumentFile, Count,
>> > UnreachableInitiator,
>> > + SourceGroup, LocStart, LocEnd, Flags);
>> > + if (SourceRegions.empty() || !SourceRegions.back().isMergeable(R))
>> > {
>> > + SourceRegions.push_back(R);
>> > + return;
>> > + }
>> > + SourceRegions.back().mergeByExtendingTo(R);
>> > + }
>> > +
>> > + void mapSourceCodeRange(SourceLocation LocStart, SourceLocation
>> > LocEnd,
>> > + Counter Count, unsigned Flags = 0) {
>> > + mapSourceCodeRange(LocStart, LocEnd, Count,
>> > + CurrentUnreachableRegionInitiator,
>> > CurrentSourceGroup,
>> > + Flags);
>> > + }
>> > +
>> > + void mapSourceCodeRange(const SourceMappingState &State,
>> > + SourceLocation LocStart, SourceLocation
>> > LocEnd,
>> > + unsigned Flags = 0) {
>> > + mapSourceCodeRange(LocStart, LocEnd, State.CurrentRegionCount,
>> > + State.CurrentUnreachableRegionInitiator,
>> > + State.CurrentSourceGroup, Flags);
>> > + }
>> > +
>> > + /// \brief Generate the coverage counter mapping regions from
>> > collected
>> > + /// source regions.
>> > + void emitSourceRegions() {
>> > + for (const auto &R : SourceRegions) {
>> > + SourceLocation LocStart = R.LocStart;
>> > + SourceLocation LocEnd = R.LocEnd;
>> > + if (SM.getFileID(LocEnd) != R.File)
>> > + LocEnd = R.AlternativeLocEnd;
>> > +
>> > + if (R.hasFlag(SourceMappingRegion::IgnoreIfNotExtended) &&
>> > + LocStart == LocEnd)
>> > + continue;
>> > +
>> > + LocEnd = getPreciseTokenLocEnd(LocEnd);
>> > + unsigned LineStart = SM.getSpellingLineNumber(LocStart);
>> > + unsigned ColumnStart = SM.getSpellingColumnNumber(LocStart);
>> > + unsigned LineEnd = SM.getSpellingLineNumber(LocEnd);
>> > + unsigned ColumnEnd = SM.getSpellingColumnNumber(LocEnd);
>> > +
>> > + auto SpellingFile =
>> > SM.getDecomposedSpellingLoc(R.LocStart).first;
>> > + unsigned CovFileID;
>> > + if (getCoverageFileID(R.LocStart, R.File, SpellingFile,
>> > CovFileID))
>> > + continue;
>> > +
>> > + assert(LineStart <= LineEnd);
>> > + MappingRegions.push_back(CounterMappingRegion(
>> > + R.Count, CovFileID, LineStart, ColumnStart, LineEnd,
>> > ColumnEnd,
>> > + false, CounterMappingRegion::CodeRegion));
>> > + }
>> > + }
>> > +};
>> > +
>> > +/// \brief Creates unreachable coverage regions for the functions that
>> > +/// are not emitted.
>> > +struct EmptyCoverageMappingBuilder : public CoverageMappingBuilder {
>> > + EmptyCoverageMappingBuilder(CoverageMappingModuleGen &CVM,
>> > SourceManager &SM,
>> > + const LangOptions &LangOpts)
>> > + : CoverageMappingBuilder(CVM, SM, LangOpts) {}
>> > +
>> > + void VisitDecl(const Decl *D) {
>> > + if (!D->hasBody())
>> > + return;
>> > + auto Body = D->getBody();
>> > + mapSourceCodeRange(Body->getLocStart(), Body->getLocEnd(),
>> > Counter());
>> > + }
>> > +
>> > + /// \brief Write the mapping data to the output stream
>> > + void write(llvm::raw_ostream &OS) {
>> > + emitSourceRegions();
>> > + SmallVector<unsigned, 16> FileIDMapping;
>> > + createFileIDMapping(FileIDMapping);
>> > +
>> > + CoverageMappingWriter Writer(
>> > + FileIDMapping, ArrayRef<CounterExpression>(), MappingRegions);
>> > + Writer.write(OS);
>> > + }
>> > +};
>> > +
>> > +/// \brief A StmtVisitor that creates coverage mapping regions which
>> > map
>> > +/// from the source code locations to the PGO counters.
>> > +struct CounterCoverageMappingBuilder
>> > + : public CoverageMappingBuilder,
>> > + public ConstStmtVisitor<CounterCoverageMappingBuilder> {
>> > + /// \brief The map of statements to count values.
>> > + llvm::DenseMap<const Stmt *, unsigned> &CounterMap;
>> > +
>> > + Counter CurrentRegionCount;
>> > +
>> > + CounterExpressionBuilder Builder;
>> > +
>> > + /// \brief Return a counter that represents the
>> > + /// expression that subracts rhs from lhs.
>> > + Counter subtractCounters(Counter LHS, Counter RHS) {
>> > + return Builder.subtract(LHS, RHS);
>> > + }
>> > +
>> > + /// \brief Return a counter that represents the
>> > + /// the exression that adds lhs and rhs.
>> > + Counter addCounters(Counter LHS, Counter RHS) {
>> > + return Builder.add(LHS, RHS);
>> > + }
>> > +
>> > + /// \brief Return the region counter for the given statement.
>> > + /// This should only be called on statements that have a dedicated
>> > counter.
>> > + unsigned getRegionCounter(const Stmt *S) { return CounterMap[S]; }
>> > +
>> > + /// \brief Return the region count for the counter at the given
>> > index.
>> > + Counter getRegionCount(unsigned CounterId) {
>> > + return Counter::getCounter(CounterId);
>> > + }
>> > +
>> > + /// \brief Return the counter value of the current region.
>> > + Counter getCurrentRegionCount() { return CurrentRegionCount; }
>> > +
>> > + /// \brief Set the counter value for the current region.
>> > + /// This is used to keep track of changes to the most recent counter
>> > + /// from control flow and non-local exits.
>> > + void setCurrentRegionCount(Counter Count) {
>> > + CurrentRegionCount = Count;
>> > + CurrentUnreachableRegionInitiator = nullptr;
>> > + }
>> > +
>> > + /// \brief Indicate that the current region is never reached,
>> > + /// and thus should have a counter value of zero.
>> > + /// This is important so that subsequent regions can correctly track
>> > + /// their parent counts.
>> > + void setCurrentRegionUnreachable(const Stmt *Initiator) {
>> > + CurrentRegionCount = Counter::getZero();
>> > + CurrentUnreachableRegionInitiator = Initiator;
>> > + }
>> > +
>> > + /// \brief A counter for a particular region.
>> > + /// This is the primary interface through
>> > + /// which the coverage mapping builder manages counters and their
>> > values.
>> > + class RegionMapper {
>> > + CounterCoverageMappingBuilder &Mapping;
>> > + Counter Count;
>> > + Counter ParentCount;
>> > + Counter RegionCount;
>> > + Counter Adjust;
>> > +
>> > + public:
>> > + RegionMapper(CounterCoverageMappingBuilder *Mapper, const Stmt *S)
>> > + : Mapping(*Mapper),
>> > + Count(Mapper->getRegionCount(Mapper->getRegionCounter(S))),
>> > + ParentCount(Mapper->getCurrentRegionCount()) {}
>> > +
>> > + /// Get the value of the counter. In most cases this is the number
>> > of times
>> > + /// the region of the counter was entered, but for switch labels
>> > it's the
>> > + /// number of direct jumps to that label.
>> > + Counter getCount() const { return Count; }
>> > +
>> > + /// Get the value of the counter with adjustments applied.
>> > Adjustments occur
>> > + /// when control enters or leaves the region abnormally; i.e., if
>> > there is a
>> > + /// jump to a label within the region, or if the function can
>> > return from
>> > + /// within the region. The adjusted count, then, is the value of
>> > the counter
>> > + /// at the end of the region.
>> > + Counter getAdjustedCount() const {
>> > + return Mapping.addCounters(Count, Adjust);
>> > + }
>> > +
>> > + /// Get the value of the counter in this region's parent, i.e., the
>> > region
>> > + /// that was active when this region began. This is useful for
>> > deriving
>> > + /// counts in implicitly counted regions, like the false case of a
>> > condition
>> > + /// or the normal exits of a loop.
>> > + Counter getParentCount() const { return ParentCount; }
>> > +
>> > + /// Activate the counter by emitting an increment and starting to
>> > track
>> > + /// adjustments. If AddIncomingFallThrough is true, the current
>> > region count
>> > + /// will be added to the counter for the purposes of tracking the
>> > region.
>> > + void beginRegion(bool AddIncomingFallThrough = false) {
>> > + RegionCount = Count;
>> > + if (AddIncomingFallThrough)
>> > + RegionCount =
>> > + Mapping.addCounters(RegionCount,
>> > Mapping.getCurrentRegionCount());
>> > + Mapping.setCurrentRegionCount(RegionCount);
>> > + }
>> > +
>> > + /// For counters on boolean branches, begins tracking adjustments
>> > for the
>> > + /// uncounted path.
>> > + void beginElseRegion() {
>> > + RegionCount = Mapping.subtractCounters(ParentCount, Count);
>> > + Mapping.setCurrentRegionCount(RegionCount);
>> > + }
>> > +
>> > + /// Reset the current region count.
>> > + void setCurrentRegionCount(Counter CurrentCount) {
>> > + RegionCount = CurrentCount;
>> > + Mapping.setCurrentRegionCount(RegionCount);
>> > + }
>> > +
>> > + /// Adjust for non-local control flow after emitting a
>> > subexpression or
>> > + /// substatement. This must be called to account for constructs
>> > such as
>> > + /// gotos,
>> > + /// labels, and returns, so that we can ensure that our region's
>> > count is
>> > + /// correct in the code that follows.
>> > + void adjustForControlFlow() {
>> > + Adjust = Mapping.addCounters(
>> > + Adjust,
>> > Mapping.subtractCounters(Mapping.getCurrentRegionCount(),
>> > + RegionCount));
>> > + // Reset the region count in case this is called again later.
>> > + RegionCount = Mapping.getCurrentRegionCount();
>> > + }
>> > +
>> > + /// Commit all adjustments to the current region. If the region is
>> > a loop,
>> > + /// the LoopAdjust value should be the count of all the breaks and
>> > continues
>> > + /// from the loop, to compensate for those counts being deducted
>> > from the
>> > + /// adjustments for the body of the loop.
>> > + void applyAdjustmentsToRegion() {
>> > + Mapping.setCurrentRegionCount(Mapping.addCounters(ParentCount,
>> > Adjust));
>> > + }
>> > + void applyAdjustmentsToRegion(Counter LoopAdjust) {
>> > + Mapping.setCurrentRegionCount(Mapping.addCounters(
>> > + Mapping.addCounters(ParentCount, Adjust), LoopAdjust));
>> > + }
>> > + };
>> > +
>> > + /// \brief Keep counts of breaks and continues inside loops.
>> > + struct BreakContinue {
>> > + Counter BreakCount;
>> > + Counter ContinueCount;
>> > + };
>> > + SmallVector<BreakContinue, 8> BreakContinueStack;
>> > +
>> > + CounterCoverageMappingBuilder(
>> > + CoverageMappingModuleGen &CVM,
>> > + llvm::DenseMap<const Stmt *, unsigned> &CounterMap,
>> > + unsigned NumRegionCounters, SourceManager &SM,
>> > + const LangOptions &LangOpts)
>> > + : CoverageMappingBuilder(CVM, SM, LangOpts),
>> > CounterMap(CounterMap),
>> > + Builder(NumRegionCounters) {}
>> > +
>> > + /// \brief Write the mapping data to the output stream
>> > + void write(llvm::raw_ostream &OS) {
>> > + emitSourceRegions();
>> > + llvm::SmallVector<unsigned, 8> VirtualFileMapping;
>> > + createFileIDMapping(VirtualFileMapping);
>> > + gatherSkippedRegions();
>> > +
>> > + CoverageMappingWriter Writer(
>> > + VirtualFileMapping, Builder.getExpressions(), MappingRegions);
>> > + Writer.write(OS);
>> > + }
>> > +
>> > + /// \brief Return the current source mapping state.
>> > + SourceMappingState getCurrentState() const {
>> > + return SourceMappingState(CurrentRegionCount, CurrentSourceGroup,
>> > + CurrentUnreachableRegionInitiator);
>> > + }
>> > +
>> > + /// \brief Associate the source code range with the current region
>> > count.
>> > + void mapSourceCodeRange(SourceLocation LocStart, SourceLocation
>> > LocEnd,
>> > + unsigned Flags = 0) {
>> > + CoverageMappingBuilder::mapSourceCodeRange(LocStart, LocEnd,
>> > + CurrentRegionCount,
>> > Flags);
>> > + }
>> > +
>> > + void mapSourceCodeRange(SourceLocation LocStart) {
>> > + CoverageMappingBuilder::mapSourceCodeRange(LocStart, LocStart,
>> > + CurrentRegionCount);
>> > + }
>> > +
>> > + /// \brief Associate the source range of a token with the current
>> > region
>> > + /// count.
>> > + /// Ignore the source range for this token if it produces a distinct
>> > + /// mapping region with no other source ranges.
>> > + void mapToken(SourceLocation LocStart) {
>> > + CoverageMappingBuilder::mapSourceCodeRange(
>> > + LocStart, LocStart, CurrentRegionCount,
>> > + SourceMappingRegion::IgnoreIfNotExtended);
>> > + }
>> > +
>> > + void mapToken(const SourceMappingState &State, SourceLocation
>> > LocStart) {
>> > + CoverageMappingBuilder::mapSourceCodeRange(
>> > + State, LocStart, LocStart,
>> > SourceMappingRegion::IgnoreIfNotExtended);
>> > + }
>> > +
>> > + void VisitStmt(const Stmt *S) {
>> > + mapSourceCodeRange(S->getLocStart());
>> > + for (Stmt::const_child_range I = S->children(); I; ++I) {
>> > + if (*I)
>> > + this->Visit(*I);
>> > + }
>> > + }
>> > +
>> > + /// \brief If the given statement is a compound statement,
>> > + /// map '}' with the same count as '{'.
>> > + void VisitSubStmtRBraceState(const Stmt *S) {
>> > + if (!isa<CompoundStmt>(S))
>> > + return Visit(S);
>> > + const auto *CS = cast<CompoundStmt>(S);
>> > + auto State = getCurrentState();
>> > + mapSourceCodeRange(CS->getLBracLoc());
>> > + for (Stmt::const_child_range I = S->children(); I; ++I) {
>> > + if (*I)
>> > + this->Visit(*I);
>> > + }
>> > + CoverageMappingBuilder::mapSourceCodeRange(State,
>> > CS->getRBracLoc(),
>> > + CS->getRBracLoc());
>> > + }
>> > +
>> > + void VisitDecl(const Decl *D) {
>> > + if (!D->hasBody())
>> > + return;
>> > + // Counter tracks entry to the function body.
>> > + auto Body = D->getBody();
>> > + RegionMapper Cnt(this, Body);
>> > + Cnt.beginRegion();
>> > + VisitSubStmtRBraceState(Body);
>> > + }
>> > +
>> > + void VisitDeclStmt(const DeclStmt *S) {
>> > + mapSourceCodeRange(S->getLocStart());
>> > + for (Stmt::const_child_range I = static_cast<const Stmt
>> > *>(S)->children();
>> > + I; ++I) {
>> > + if (*I)
>> > + this->Visit(*I);
>> > + }
>> > + }
>> > +
>> > + void VisitCompoundStmt(const CompoundStmt *S) {
>> > + mapSourceCodeRange(S->getLBracLoc());
>> > + for (Stmt::const_child_range I = S->children(); I; ++I) {
>> > + if (*I)
>> > + this->Visit(*I);
>> > + }
>> > + mapSourceCodeRange(S->getRBracLoc(), S->getRBracLoc());
>> > + }
>> > +
>> > + void VisitReturnStmt(const ReturnStmt *S) {
>> > + mapSourceCodeRange(S->getLocStart());
>> > + if (S->getRetValue())
>> > + Visit(S->getRetValue());
>> > + setCurrentRegionUnreachable(S);
>> > + }
>> > +
>> > + void VisitGotoStmt(const GotoStmt *S) {
>> > + mapSourceCodeRange(S->getLocStart());
>> > + mapToken(S->getLabelLoc());
>> > + setCurrentRegionUnreachable(S);
>> > + }
>> > +
>> > + void VisitLabelStmt(const LabelStmt *S) {
>> > + // Counter tracks the block following the label.
>> > + RegionMapper Cnt(this, S);
>> > + Cnt.beginRegion();
>> > + mapSourceCodeRange(S->getLocStart());
>> > + // Can't map the ':' token as its location isn't known.
>> > + Visit(S->getSubStmt());
>> > + }
>> > +
>> > + void VisitBreakStmt(const BreakStmt *S) {
>> > + mapSourceCodeRange(S->getLocStart());
>> > + assert(!BreakContinueStack.empty() && "break not in a loop or
>> > switch!");
>> > + BreakContinueStack.back().BreakCount = addCounters(
>> > + BreakContinueStack.back().BreakCount, getCurrentRegionCount());
>> > + setCurrentRegionUnreachable(S);
>> > + }
>> > +
>> > + void VisitContinueStmt(const ContinueStmt *S) {
>> > + mapSourceCodeRange(S->getLocStart());
>> > + assert(!BreakContinueStack.empty() && "continue stmt not in a
>> > loop!");
>> > + BreakContinueStack.back().ContinueCount = addCounters(
>> > + BreakContinueStack.back().ContinueCount,
>> > getCurrentRegionCount());
>> > + setCurrentRegionUnreachable(S);
>> > + }
>> > +
>> > + void VisitWhileStmt(const WhileStmt *S) {
>> > + mapSourceCodeRange(S->getLocStart());
>> > + // Counter tracks the body of the loop.
>> > + RegionMapper Cnt(this, S);
>> > + BreakContinueStack.push_back(BreakContinue());
>> > + // Visit the body region first so the break/continue adjustments
>> > can be
>> > + // included when visiting the condition.
>> > + Cnt.beginRegion();
>> > + VisitSubStmtRBraceState(S->getBody());
>> > + Cnt.adjustForControlFlow();
>> > +
>> > + // ...then go back and propagate counts through the condition. The
>> > count
>> > + // at the start of the condition is the sum of the incoming edges,
>> > + // the backedge from the end of the loop body, and the edges from
>> > + // continue statements.
>> > + BreakContinue BC = BreakContinueStack.pop_back_val();
>> > + Cnt.setCurrentRegionCount(
>> > + addCounters(Cnt.getParentCount(),
>> > + addCounters(Cnt.getAdjustedCount(),
>> > BC.ContinueCount)));
>> > + beginSourceRegionGroup(S->getCond());
>> > + Visit(S->getCond());
>> > + endSourceRegionGroup();
>> > + Cnt.adjustForControlFlow();
>> > + Cnt.applyAdjustmentsToRegion(addCounters(BC.BreakCount,
>> > BC.ContinueCount));
>> > + }
>> > +
>> > + void VisitDoStmt(const DoStmt *S) {
>> > + mapSourceCodeRange(S->getLocStart());
>> > + // Counter tracks the body of the loop.
>> > + RegionMapper Cnt(this, S);
>> > + BreakContinueStack.push_back(BreakContinue());
>> > + Cnt.beginRegion(/*AddIncomingFallThrough=*/true);
>> > + VisitSubStmtRBraceState(S->getBody());
>> > + Cnt.adjustForControlFlow();
>> > +
>> > + BreakContinue BC = BreakContinueStack.pop_back_val();
>> > + // The count at the start of the condition is equal to the count at
>> > the
>> > + // end of the body. The adjusted count does not include either the
>> > + // fall-through count coming into the loop or the continue count,
>> > so add
>> > + // both of those separately. This is coincidentally the same
>> > equation as
>> > + // with while loops but for different reasons.
>> > + Cnt.setCurrentRegionCount(
>> > + addCounters(Cnt.getParentCount(),
>> > + addCounters(Cnt.getAdjustedCount(),
>> > BC.ContinueCount)));
>> > + Visit(S->getCond());
>> > + Cnt.adjustForControlFlow();
>> > + Cnt.applyAdjustmentsToRegion(addCounters(BC.BreakCount,
>> > BC.ContinueCount));
>> > + }
>> > +
>> > + void VisitForStmt(const ForStmt *S) {
>> > + mapSourceCodeRange(S->getLocStart());
>> > + if (S->getInit())
>> > + Visit(S->getInit());
>> > +
>> > + // Counter tracks the body of the loop.
>> > + RegionMapper Cnt(this, S);
>> > + BreakContinueStack.push_back(BreakContinue());
>> > + // Visit the body region first. (This is basically the same as a
>> > while
>> > + // loop; see further comments in VisitWhileStmt.)
>> > + Cnt.beginRegion();
>> > + VisitSubStmtRBraceState(S->getBody());
>> > + Cnt.adjustForControlFlow();
>> > +
>> > + // The increment is essentially part of the body but it needs to
>> > include
>> > + // the count for all the continue statements.
>> > + if (S->getInc()) {
>> > + Cnt.setCurrentRegionCount(addCounters(
>> > + getCurrentRegionCount(),
>> > BreakContinueStack.back().ContinueCount));
>> > + beginSourceRegionGroup(S->getInc());
>> > + Visit(S->getInc());
>> > + endSourceRegionGroup();
>> > + Cnt.adjustForControlFlow();
>> > + }
>> > +
>> > + BreakContinue BC = BreakContinueStack.pop_back_val();
>> > +
>> > + // ...then go back and propagate counts through the condition.
>> > + if (S->getCond()) {
>> > + Cnt.setCurrentRegionCount(
>> > + addCounters(addCounters(Cnt.getParentCount(),
>> > Cnt.getAdjustedCount()),
>> > + BC.ContinueCount));
>> > + beginSourceRegionGroup(S->getCond());
>> > + Visit(S->getCond());
>> > + endSourceRegionGroup();
>> > + Cnt.adjustForControlFlow();
>> > + }
>> > + Cnt.applyAdjustmentsToRegion(addCounters(BC.BreakCount,
>> > BC.ContinueCount));
>> > + }
>> > +
>> > + void VisitCXXForRangeStmt(const CXXForRangeStmt *S) {
>> > + mapSourceCodeRange(S->getLocStart());
>> > + Visit(S->getRangeStmt());
>> > + Visit(S->getBeginEndStmt());
>> > + // Counter tracks the body of the loop.
>> > + RegionMapper Cnt(this, S);
>> > + BreakContinueStack.push_back(BreakContinue());
>> > + // Visit the body region first. (This is basically the same as a
>> > while
>> > + // loop; see further comments in VisitWhileStmt.)
>> > + Cnt.beginRegion();
>> > + VisitSubStmtRBraceState(S->getBody());
>> > + Cnt.adjustForControlFlow();
>> > + BreakContinue BC = BreakContinueStack.pop_back_val();
>> > + Cnt.applyAdjustmentsToRegion(addCounters(BC.BreakCount,
>> > BC.ContinueCount));
>> > + }
>> > +
>> > + void VisitObjCForCollectionStmt(const ObjCForCollectionStmt *S) {
>> > + mapSourceCodeRange(S->getLocStart());
>> > + Visit(S->getElement());
>> > + // Counter tracks the body of the loop.
>> > + RegionMapper Cnt(this, S);
>> > + BreakContinueStack.push_back(BreakContinue());
>> > + VisitSubStmtRBraceState(S->getBody());
>> > + BreakContinue BC = BreakContinueStack.pop_back_val();
>> > + Cnt.adjustForControlFlow();
>> > + Cnt.applyAdjustmentsToRegion(addCounters(BC.BreakCount,
>> > BC.ContinueCount));
>> > + }
>> > +
>> > + void VisitSwitchStmt(const SwitchStmt *S) {
>> > + mapSourceCodeRange(S->getLocStart());
>> > + Visit(S->getCond());
>> > + BreakContinueStack.push_back(BreakContinue());
>> > + // Map the '}' for the body to have the same count as the regions
>> > after
>> > + // the switch.
>> > + SourceLocation RBracLoc;
>> > + if (const auto *CS = dyn_cast<CompoundStmt>(S->getBody())) {
>> > + mapSourceCodeRange(CS->getLBracLoc());
>> > + setCurrentRegionUnreachable(S);
>> > + for (Stmt::const_child_range I = CS->children(); I; ++I) {
>> > + if (*I)
>> > + this->Visit(*I);
>> > + }
>> > + RBracLoc = CS->getRBracLoc();
>> > + } else {
>> > + setCurrentRegionUnreachable(S);
>> > + Visit(S->getBody());
>> > + }
>> > + // If the switch is inside a loop, add the continue counts.
>> > + BreakContinue BC = BreakContinueStack.pop_back_val();
>> > + if (!BreakContinueStack.empty())
>> > + BreakContinueStack.back().ContinueCount = addCounters(
>> > + BreakContinueStack.back().ContinueCount, BC.ContinueCount);
>> > + // Counter tracks the exit block of the switch.
>> > + RegionMapper ExitCnt(this, S);
>> > + ExitCnt.beginRegion();
>> > + if (RBracLoc.isValid())
>> > + mapSourceCodeRange(RBracLoc);
>> > + }
>> > +
>> > + void VisitCaseStmt(const CaseStmt *S) {
>> > + // Counter for this particular case. This counts only jumps from
>> > the
>> > + // switch header and does not include fallthrough from the case
>> > before
>> > + // this one.
>> > + RegionMapper Cnt(this, S);
>> > + Cnt.beginRegion(/*AddIncomingFallThrough=*/true);
>> > + mapSourceCodeRange(S->getLocStart());
>> > + mapToken(S->getColonLoc());
>> > + Visit(S->getSubStmt());
>> > + }
>> > +
>> > + void VisitDefaultStmt(const DefaultStmt *S) {
>> > + // Counter for this default case. This does not include fallthrough
>> > from
>> > + // the previous case.
>> > + RegionMapper Cnt(this, S);
>> > + Cnt.beginRegion(/*AddIncomingFallThrough=*/true);
>> > + mapSourceCodeRange(S->getLocStart());
>> > + mapToken(S->getColonLoc());
>> > + Visit(S->getSubStmt());
>> > + }
>> > +
>> > + void VisitIfStmt(const IfStmt *S) {
>> > + mapSourceCodeRange(S->getLocStart());
>> > + Visit(S->getCond());
>> > + mapToken(S->getElseLoc());
>> > +
>> > + // Counter tracks the "then" part of an if statement. The count for
>> > + // the "else" part, if it exists, will be calculated from this
>> > counter.
>> > + RegionMapper Cnt(this, S);
>> > + Cnt.beginRegion();
>> > + VisitSubStmtRBraceState(S->getThen());
>> > + Cnt.adjustForControlFlow();
>> > +
>> > + if (S->getElse()) {
>> > + Cnt.beginElseRegion();
>> > + VisitSubStmtRBraceState(S->getElse());
>> > + Cnt.adjustForControlFlow();
>> > + }
>> > + Cnt.applyAdjustmentsToRegion();
>> > + }
>> > +
>> > + void VisitCXXTryStmt(const CXXTryStmt *S) {
>> > + mapSourceCodeRange(S->getLocStart());
>> > + Visit(S->getTryBlock());
>> > + for (unsigned I = 0, E = S->getNumHandlers(); I < E; ++I)
>> > + Visit(S->getHandler(I));
>> > + // Counter tracks the continuation block of the try statement.
>> > + RegionMapper Cnt(this, S);
>> > + Cnt.beginRegion();
>> > + }
>> > +
>> > + void VisitCXXCatchStmt(const CXXCatchStmt *S) {
>> > + mapSourceCodeRange(S->getLocStart());
>> > + // Counter tracks the catch statement's handler block.
>> > + RegionMapper Cnt(this, S);
>> > + Cnt.beginRegion();
>> > + VisitSubStmtRBraceState(S->getHandlerBlock());
>> > + }
>> > +
>> > + void VisitAbstractConditionalOperator(const
>> > AbstractConditionalOperator *E) {
>> > + Visit(E->getCond());
>> > + mapToken(E->getQuestionLoc());
>> > + auto State = getCurrentState();
>> > +
>> > + // Counter tracks the "true" part of a conditional operator. The
>> > + // count in the "false" part will be calculated from this counter.
>> > + RegionMapper Cnt(this, E);
>> > + Cnt.beginRegion();
>> > + Visit(E->getTrueExpr());
>> > + Cnt.adjustForControlFlow();
>> > +
>> > + mapToken(State, E->getColonLoc());
>> > +
>> > + Cnt.beginElseRegion();
>> > + Visit(E->getFalseExpr());
>> > + Cnt.adjustForControlFlow();
>> > +
>> > + Cnt.applyAdjustmentsToRegion();
>> > + }
>> > +
>> > + void VisitBinLAnd(const BinaryOperator *E) {
>> > + Visit(E->getLHS());
>> > + mapToken(E->getOperatorLoc());
>> > + // Counter tracks the right hand side of a logical and operator.
>> > + RegionMapper Cnt(this, E);
>> > + Cnt.beginRegion();
>> > + Visit(E->getRHS());
>> > + Cnt.adjustForControlFlow();
>> > + Cnt.applyAdjustmentsToRegion();
>> > + }
>> > +
>> > + void VisitBinLOr(const BinaryOperator *E) {
>> > + Visit(E->getLHS());
>> > + mapToken(E->getOperatorLoc());
>> > + // Counter tracks the right hand side of a logical or operator.
>> > + RegionMapper Cnt(this, E);
>> > + Cnt.beginRegion();
>> > + Visit(E->getRHS());
>> > + Cnt.adjustForControlFlow();
>> > + Cnt.applyAdjustmentsToRegion();
>> > + }
>> > +
>> > + void VisitParenExpr(const ParenExpr *E) {
>> > + mapToken(E->getLParen());
>> > + Visit(E->getSubExpr());
>> > + mapToken(E->getRParen());
>> > + }
>> > +
>> > + void VisitBinaryOperator(const BinaryOperator *E) {
>> > + Visit(E->getLHS());
>> > + mapToken(E->getOperatorLoc());
>> > + Visit(E->getRHS());
>> > + }
>> > +
>> > + void VisitUnaryOperator(const UnaryOperator *E) {
>> > + bool Postfix = E->isPostfix();
>> > + if (!Postfix)
>> > + mapToken(E->getOperatorLoc());
>> > + Visit(E->getSubExpr());
>> > + if (Postfix)
>> > + mapToken(E->getOperatorLoc());
>> > + }
>> > +
>> > + void VisitMemberExpr(const MemberExpr *E) {
>> > + Visit(E->getBase());
>> > + mapToken(E->getMemberLoc());
>> > + }
>> > +
>> > + void VisitCallExpr(const CallExpr *E) {
>> > + Visit(E->getCallee());
>> > + for (const auto &Arg : E->arguments())
>> > + Visit(Arg);
>> > + mapToken(E->getRParenLoc());
>> > + }
>> > +
>> > + void VisitArraySubscriptExpr(const ArraySubscriptExpr *E) {
>> > + Visit(E->getLHS());
>> > + Visit(E->getRHS());
>> > + mapToken(E->getRBracketLoc());
>> > + }
>> > +
>> > + void VisitCStyleCastExpr(const CStyleCastExpr *E) {
>> > + mapToken(E->getLParenLoc());
>> > + mapToken(E->getRParenLoc());
>> > + Visit(E->getSubExpr());
>> > + }
>> > +
>> > + // Map literals as tokens so that the macros like #define PI 3.14
>> > + // won't generate coverage mapping regions.
>> > +
>> > + void VisitIntegerLiteral(const IntegerLiteral *E) {
>> > + mapToken(E->getLocStart());
>> > + }
>> > +
>> > + void VisitFloatingLiteral(const FloatingLiteral *E) {
>> > + mapToken(E->getLocStart());
>> > + }
>> > +
>> > + void VisitCharacterLiteral(const CharacterLiteral *E) {
>> > + mapToken(E->getLocStart());
>> > + }
>> > +
>> > + void VisitStringLiteral(const StringLiteral *E) {
>> > + mapToken(E->getLocStart());
>> > + }
>> > +
>> > + void VisitImaginaryLiteral(const ImaginaryLiteral *E) {
>> > + mapToken(E->getLocStart());
>> > + }
>> > +};
>> > +}
>> > +
>> > +static bool isMachO(const CodeGenModule &CGM) {
>> > + return CGM.getTarget().getTriple().isOSBinFormatMachO();
>> > +}
>> > +
>> > +static StringRef getCoverageSection(const CodeGenModule &CGM) {
>> > + return isMachO(CGM) ? "__DATA,__llvm_covmap" : "__llvm_covmap";
>> > +}
>> > +
>> > +void CoverageMappingModuleGen::addFunctionMappingRecord(
>> > + llvm::GlobalVariable *FunctionName, unsigned FunctionNameSize,
>> > + const std::string &CoverageMapping) {
>> > + llvm::LLVMContext &Ctx = CGM.getLLVMContext();
>> > + auto *Int32Ty = llvm::Type::getInt32Ty(Ctx);
>> > + auto *Int8PtrTy = llvm::Type::getInt8PtrTy(Ctx);
>> > + if (!FunctionRecordTy) {
>> > + llvm::Type *FunctionRecordTypes[] = {Int8PtrTy, Int32Ty, Int32Ty};
>> > + FunctionRecordTy =
>> > + llvm::StructType::get(Ctx, makeArrayRef(FunctionRecordTypes));
>> > + }
>> > +
>> > + llvm::Constant *FunctionRecordVals[] = {
>> > + llvm::ConstantExpr::getBitCast(FunctionName, Int8PtrTy),
>> > + llvm::ConstantInt::get(Int32Ty, FunctionNameSize),
>> > + llvm::ConstantInt::get(Int32Ty, CoverageMapping.size())};
>> > + FunctionRecords.push_back(llvm::ConstantStruct::get(
>> > + FunctionRecordTy, makeArrayRef(FunctionRecordVals)));
>> > + CoverageMappings += CoverageMapping;
>> > +}
>> > +
>> > +void CoverageMappingModuleGen::emit() {
>> > + if (FunctionRecords.empty())
>> > + return;
>> > + llvm::LLVMContext &Ctx = CGM.getLLVMContext();
>> > + auto *Int32Ty = llvm::Type::getInt32Ty(Ctx);
>> > +
>> > + // Create the filenames and merge them with coverage mappings
>> > + llvm::SmallVector<std::string, 16> FilenameStrs;
>> > + llvm::SmallVector<StringRef, 16> FilenameRefs;
>> > + FilenameStrs.resize(FileEntries.size());
>> > + FilenameRefs.resize(FileEntries.size());
>> > + for (const auto &Entry : FileEntries) {
>> > + llvm::SmallString<256> Path(Entry.first->getName());
>> > + llvm::sys::fs::make_absolute(Path);
>> > +
>> > + auto I = Entry.second;
>> > + FilenameStrs[I] = std::move(std::string(Path.begin(), Path.end()));
>> > + FilenameRefs[I] = FilenameStrs[I];
>> > + }
>> > +
>> > + std::string FilenamesAndCoverageMappings;
>> > + llvm::raw_string_ostream OS(FilenamesAndCoverageMappings);
>> > + CoverageFilenamesSectionWriter(FilenameRefs).write(OS);
>> > + OS << CoverageMappings;
>> > + size_t CoverageMappingSize = CoverageMappings.size();
>> > + size_t FilenamesSize = OS.str().size() - CoverageMappingSize;
>> > + // Append extra zeroes if necessary to ensure that the size of the
>> > filenames
>> > + // and coverage mappings is a multiple of 8.
>> > + if (size_t Rem = OS.str().size() % 8) {
>> > + CoverageMappingSize += 8 - Rem;
>> > + for (size_t I = 0, S = 8 - Rem; I < S; ++I)
>> > + OS << '\0';
>> > + }
>> > + auto *FilenamesAndMappingsVal =
>> > + llvm::ConstantDataArray::getString(Ctx, OS.str(), false);
>> > +
>> > + // Create the deferred function records array
>> > + auto RecordsTy =
>> > + llvm::ArrayType::get(FunctionRecordTy, FunctionRecords.size());
>> > + auto RecordsVal = llvm::ConstantArray::get(RecordsTy,
>> > FunctionRecords);
>> > +
>> > + // Create the coverage data record
>> > + llvm::Type *CovDataTypes[] = {Int32Ty, Int32Ty,
>> > + Int32Ty, Int32Ty,
>> > + RecordsTy,
>> > FilenamesAndMappingsVal->getType()};
>> > + auto CovDataTy = llvm::StructType::get(Ctx,
>> > makeArrayRef(CovDataTypes));
>> > + llvm::Constant *TUDataVals[] = {
>> > + llvm::ConstantInt::get(Int32Ty, FunctionRecords.size()),
>> > + llvm::ConstantInt::get(Int32Ty, FilenamesSize),
>> > + llvm::ConstantInt::get(Int32Ty, CoverageMappingSize),
>> > + llvm::ConstantInt::get(Int32Ty,
>> > + /*Version=*/CoverageMappingVersion1),
>> > + RecordsVal, FilenamesAndMappingsVal};
>> > + auto CovDataVal =
>> > + llvm::ConstantStruct::get(CovDataTy, makeArrayRef(TUDataVals));
>> > + auto CovData = new llvm::GlobalVariable(CGM.getModule(), CovDataTy,
>> > true,
>> > +
>> > llvm::GlobalValue::InternalLinkage,
>> > + CovDataVal,
>> > + "__llvm_coverage_mapping");
>> > +
>> > + CovData->setSection(getCoverageSection(CGM));
>> > + CovData->setAlignment(8);
>> > +
>> > + // Make sure the data doesn't get deleted.
>> > + CGM.addUsedGlobal(CovData);
>> > +}
>> > +
>> > +unsigned CoverageMappingModuleGen::getFileID(const FileEntry *File) {
>> > + auto It = FileEntries.find(File);
>> > + if (It != FileEntries.end())
>> > + return It->second;
>> > + unsigned FileID = FileEntries.size();
>> > + FileEntries.insert(std::make_pair(File, FileID));
>> > + return FileID;
>> > +}
>> > +
>> > +void CoverageMappingGen::emitCounterMapping(const Decl *D,
>> > + llvm::raw_ostream &OS) {
>> > + assert(CounterMap);
>> > + CounterCoverageMappingBuilder Walker(CVM, *CounterMap,
>> > NumRegionCounters, SM,
>> > + LangOpts);
>> > + Walker.VisitDecl(D);
>> > + Walker.write(OS);
>> > +}
>> > +
>> > +void CoverageMappingGen::emitEmptyMapping(const Decl *D,
>> > + llvm::raw_ostream &OS) {
>> > + EmptyCoverageMappingBuilder Walker(CVM, SM, LangOpts);
>> > + Walker.VisitDecl(D);
>> > + Walker.write(OS);
>> > +}
>> >
>> > Added: cfe/trunk/lib/CodeGen/CoverageMappingGen.h
>> > URL:
>> > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CoverageMappingGen.h?rev=214752&view=auto
>> >
>> > ==============================================================================
>> > --- cfe/trunk/lib/CodeGen/CoverageMappingGen.h (added)
>> > +++ cfe/trunk/lib/CodeGen/CoverageMappingGen.h Mon Aug 4 13:41:51 2014
>> > @@ -0,0 +1,117 @@
>> > +//===---- CoverageMappingGen.h - Coverage mapping generation ----*- C++
>> > -*-===//
>> > +//
>> > +// The LLVM Compiler Infrastructure
>> > +//
>> > +// This file is distributed under the University of Illinois Open
>> > Source
>> > +// License. See LICENSE.TXT for details.
>> > +//
>> >
>> > +//===----------------------------------------------------------------------===//
>> > +//
>> > +// Instrumentation-based code coverage mapping generator
>> > +//
>> >
>> > +//===----------------------------------------------------------------------===//
>> > +
>> > +#ifndef CLANG_CODEGEN_COVERAGEMAPPINGGEN_H
>> > +#define CLANG_CODEGEN_COVERAGEMAPPINGGEN_H
>> > +
>> > +#include "clang/Basic/LLVM.h"
>> > +#include "clang/Basic/SourceLocation.h"
>> > +#include "clang/Lex/PPCallbacks.h"
>> > +#include "clang/Frontend/CodeGenOptions.h"
>> > +#include "llvm/ADT/StringMap.h"
>> > +#include "llvm/ADT/DenseMap.h"
>> > +#include "llvm/IR/GlobalValue.h"
>> > +#include "llvm/Support/raw_ostream.h"
>> > +
>> > +namespace clang {
>> > +
>> > +class LangOptions;
>> > +class SourceManager;
>> > +class FileEntry;
>> > +class Preprocessor;
>> > +class Decl;
>> > +class Stmt;
>> > +
>> > +/// \brief Stores additional source code information like skipped
>> > ranges which
>> > +/// is required by the coverage mapping generator and is obtained from
>> > +/// the preprocessor.
>> > +class CoverageSourceInfo : public PPCallbacks {
>> > + std::vector<SourceRange> SkippedRanges;
>> > +public:
>> > + ArrayRef<SourceRange> getSkippedRanges() const { return
>> > SkippedRanges; }
>> > +
>> > + void SourceRangeSkipped(SourceRange Range) override;
>> > +};
>> > +
>> > +namespace CodeGen {
>> > +
>> > +class CodeGenModule;
>> > +
>> > +/// \brief Organizes the cross-function state that is used while
>> > generating
>> > +/// code coverage mapping data.
>> > +class CoverageMappingModuleGen {
>> > + CodeGenModule &CGM;
>> > + CoverageSourceInfo &SourceInfo;
>> > + llvm::SmallDenseMap<const FileEntry *, unsigned, 8> FileEntries;
>> > + std::vector<llvm::Constant *> FunctionRecords;
>> > + llvm::StructType *FunctionRecordTy;
>> > + std::string CoverageMappings;
>> > +
>> > +public:
>> > + CoverageMappingModuleGen(CodeGenModule &CGM, CoverageSourceInfo
>> > &SourceInfo)
>> > + : CGM(CGM), SourceInfo(SourceInfo), FunctionRecordTy(nullptr) {}
>> > +
>> > + CoverageSourceInfo &getSourceInfo() const {
>> > + return SourceInfo;
>> > + }
>> > +
>> > + /// \brief Add a function's coverage mapping record to the collection
>> > of the
>> > + /// function mapping records.
>> > + void addFunctionMappingRecord(llvm::GlobalVariable *FunctionName,
>> > + unsigned FunctionNameSize,
>> > + const std::string &CoverageMapping);
>> > +
>> > + /// \brief Emit the coverage mapping data for a translation unit.
>> > + void emit();
>> > +
>> > + /// \brief Return the coverage mapping translation unit file id
>> > + /// for the given file.
>> > + unsigned getFileID(const FileEntry *File);
>> > +};
>> > +
>> > +/// \brief Organizes the per-function state that is used while
>> > generating
>> > +/// code coverage mapping data.
>> > +class CoverageMappingGen {
>> > + CoverageMappingModuleGen &CVM;
>> > + SourceManager &SM;
>> > + const LangOptions &LangOpts;
>> > + llvm::DenseMap<const Stmt *, unsigned> *CounterMap;
>> > + unsigned NumRegionCounters;
>> > +
>> > +public:
>> > + CoverageMappingGen(CoverageMappingModuleGen &CVM, SourceManager &SM,
>> > + const LangOptions &LangOpts)
>> > + : CVM(CVM), SM(SM), LangOpts(LangOpts), CounterMap(nullptr),
>> > + NumRegionCounters(0) {}
>> > +
>> > + CoverageMappingGen(CoverageMappingModuleGen &CVM, SourceManager &SM,
>> > + const LangOptions &LangOpts,
>> > + llvm::DenseMap<const Stmt *, unsigned>
>> > *CounterMap,
>> > + unsigned NumRegionCounters)
>> > + : CVM(CVM), SM(SM), LangOpts(LangOpts), CounterMap(CounterMap),
>> > + NumRegionCounters(NumRegionCounters) {}
>> > +
>> > + /// \brief Emit the coverage mapping data which maps the regions of
>> > + /// code to counters that will be used to find the execution
>> > + /// counts for those regions.
>> > + void emitCounterMapping(const Decl *D, llvm::raw_ostream &OS);
>> > +
>> > + /// \brief Emit the coverage mapping data for an unused function.
>> > + /// It creates mapping regions with the counter of zero.
>> > + void emitEmptyMapping(const Decl *D, llvm::raw_ostream &OS);
>> > +};
>> > +
>> > +} // end namespace CodeGen
>> > +} // end namespace clang
>> > +
>> > +#endif
>> >
>> > Modified: cfe/trunk/lib/CodeGen/ModuleBuilder.cpp
>> > URL:
>> > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/ModuleBuilder.cpp?rev=214752&r1=214751&r2=214752&view=diff
>> >
>> > ==============================================================================
>> > --- cfe/trunk/lib/CodeGen/ModuleBuilder.cpp (original)
>> > +++ cfe/trunk/lib/CodeGen/ModuleBuilder.cpp Mon Aug 4 13:41:51 2014
>> > @@ -46,14 +46,18 @@ namespace {
>> > }
>> > };
>> >
>> > + CoverageSourceInfo *CoverageInfo;
>> > +
>> > protected:
>> > std::unique_ptr<llvm::Module> M;
>> > std::unique_ptr<CodeGen::CodeGenModule> Builder;
>> >
>> > public:
>> > CodeGeneratorImpl(DiagnosticsEngine &diags, const std::string&
>> > ModuleName,
>> > - const CodeGenOptions &CGO, llvm::LLVMContext& C)
>> > + const CodeGenOptions &CGO, llvm::LLVMContext& C,
>> > + CoverageSourceInfo *CoverageInfo = nullptr)
>> > : Diags(diags), CodeGenOpts(CGO), HandlingTopLevelDecls(0),
>> > + CoverageInfo(CoverageInfo),
>> > M(new llvm::Module(ModuleName, C)) {}
>> >
>> > virtual ~CodeGeneratorImpl() {}
>> > @@ -86,7 +90,7 @@ namespace {
>> > M->setDataLayout(Ctx->getTargetInfo().getTargetDescription());
>> > TD.reset(new
>> > llvm::DataLayout(Ctx->getTargetInfo().getTargetDescription()));
>> > Builder.reset(new CodeGen::CodeGenModule(Context, CodeGenOpts,
>> > *M, *TD,
>> > - Diags));
>> > + Diags, CoverageInfo));
>> >
>> > for (size_t i = 0, e = CodeGenOpts.DependentLibraries.size(); i <
>> > e; ++i)
>> > HandleDependentLibrary(CodeGenOpts.DependentLibraries[i]);
>> > @@ -136,6 +140,10 @@ namespace {
>> > // void foo() { bar(); }
>> > // } A;
>> > DeferredInlineMethodDefinitions.push_back(D);
>> > +
>> > + // Always provide some coverage mapping
>> > + // even for the methods that aren't emitted.
>> > + Builder->AddDeferredUnusedCoverageMapping(D);
>> > }
>> >
>> > /// HandleTagDeclDefinition - This callback is invoked each time a
>> > TagDecl
>> > @@ -221,6 +229,7 @@ CodeGenerator *clang::CreateLLVMCodeGen(
>> > const std::string& ModuleName,
>> > const CodeGenOptions &CGO,
>> > const TargetOptions &/*TO*/,
>> > - llvm::LLVMContext& C) {
>> > - return new CodeGeneratorImpl(Diags, ModuleName, CGO, C);
>> > + llvm::LLVMContext& C,
>> > + CoverageSourceInfo
>> > *CoverageInfo) {
>> > + return new CodeGeneratorImpl(Diags, ModuleName, CGO, C,
>> > CoverageInfo);
>> > }
>> >
>> > Modified: cfe/trunk/lib/Driver/Tools.cpp
>> > URL:
>> > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Tools.cpp?rev=214752&r1=214751&r2=214752&view=diff
>> >
>> > ==============================================================================
>> > --- cfe/trunk/lib/Driver/Tools.cpp (original)
>> > +++ cfe/trunk/lib/Driver/Tools.cpp Mon Aug 4 13:41:51 2014
>> > @@ -3230,6 +3230,14 @@ void Clang::ConstructJob(Compilation &C,
>> > Args.hasArg(options::OPT_coverage))
>> > CmdArgs.push_back("-femit-coverage-data");
>> >
>> > + if (Args.hasArg(options::OPT_fcoverage_mapping) &&
>> > + !Args.hasArg(options::OPT_fprofile_instr_generate))
>> > + D.Diag(diag::err_drv_argument_only_allowed_with)
>> > + << "-fcoverage-mapping" << "-fprofile-instr-generate";
>> > +
>> > + if (Args.hasArg(options::OPT_fcoverage_mapping))
>> > + CmdArgs.push_back("-fcoverage-mapping");
>> > +
>> > if (C.getArgs().hasArg(options::OPT_c) ||
>> > C.getArgs().hasArg(options::OPT_S)) {
>> > if (Output.isFilename()) {
>> >
>> > Modified: cfe/trunk/lib/Frontend/CompilerInvocation.cpp
>> > URL:
>> > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/CompilerInvocation.cpp?rev=214752&r1=214751&r2=214752&view=diff
>> >
>> > ==============================================================================
>> > --- cfe/trunk/lib/Frontend/CompilerInvocation.cpp (original)
>> > +++ cfe/trunk/lib/Frontend/CompilerInvocation.cpp Mon Aug 4 13:41:51
>> > 2014
>> > @@ -403,6 +403,7 @@ static bool ParseCodeGenArgs(CodeGenOpti
>> > Opts.SampleProfileFile =
>> > Args.getLastArgValue(OPT_fprofile_sample_use_EQ);
>> > Opts.ProfileInstrGenerate = Args.hasArg(OPT_fprofile_instr_generate);
>> > Opts.InstrProfileInput =
>> > Args.getLastArgValue(OPT_fprofile_instr_use_EQ);
>> > + Opts.CoverageMapping = Args.hasArg(OPT_fcoverage_mapping);
>> > Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
>> > Opts.ObjCAutoRefCountExceptions =
>> > Args.hasArg(OPT_fobjc_arc_exceptions);
>> > Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
>> >
>> >
>> > _______________________________________________
>> > cfe-commits mailing list
>> > cfe-commits at cs.uiuc.edu
>> > http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits
>
>
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