<div dir="ltr"><br><div class="gmail_extra"><br><br><div class="gmail_quote">2014-08-04 12:15 GMT-07:00 Alex L <span dir="ltr"><<a href="mailto:arphaman@gmail.com" target="_blank">arphaman@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">My fix reverted in r214757.<br></div></blockquote><div><br></div><div>That should have said r214759 of course.<br> <br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr"></div><div class="gmail_extra"><br><br><div class="gmail_quote">2014-08-04 12:11 GMT-07:00 David Blaikie <span dir="ltr"><<a href="mailto:dblaikie@gmail.com" target="_blank">dblaikie@gmail.com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Ah, sorry - thanks :)<br>
<div><div><br>
On Mon, Aug 4, 2014 at 12:10 PM, Alex L <<a href="mailto:arphaman@gmail.com" target="_blank">arphaman@gmail.com</a>> wrote:<br>
> I actually fixed it in r214757, now there are two :)<br>
> I will revert mine<br>
><br>
><br>
> 2014-08-04 12:08 GMT-07:00 David Blaikie <<a href="mailto:dblaikie@gmail.com" target="_blank">dblaikie@gmail.com</a>>:<br>
>><br>
>> CMake build fixed in r214758<br>
>><br>
>> On Mon, Aug 4, 2014 at 11:41 AM, Alex Lorenz <<a href="mailto:arphaman@gmail.com" target="_blank">arphaman@gmail.com</a>> wrote:<br>
>> > Author: arphaman<br>
>> > Date: Mon Aug 4 13:41:51 2014<br>
>> > New Revision: 214752<br>
>> ><br>
>> > URL: <a href="http://llvm.org/viewvc/llvm-project?rev=214752&view=rev" target="_blank">http://llvm.org/viewvc/llvm-project?rev=214752&view=rev</a><br>
>> > Log:<br>
>> > Add coverage mapping generation.<br>
>> ><br>
>> > This patch adds the '-fcoverage-mapping' option which<br>
>> > allows clang to generate the coverage mapping information<br>
>> > that can be used to provide code coverage analysis using<br>
>> > the execution counts obtained from the instrumentation<br>
>> > based profiling (-fprofile-instr-generate).<br>
>> ><br>
>> > Added:<br>
>> > cfe/trunk/lib/CodeGen/CoverageMappingGen.cpp<br>
>> > cfe/trunk/lib/CodeGen/CoverageMappingGen.h<br>
>> > Modified:<br>
>> > cfe/trunk/include/clang/CodeGen/CodeGenABITypes.h<br>
>> > cfe/trunk/include/clang/CodeGen/ModuleBuilder.h<br>
>> > cfe/trunk/include/clang/Driver/Options.td<br>
>> > cfe/trunk/include/clang/Frontend/CodeGenOptions.def<br>
>> > cfe/trunk/lib/CodeGen/CodeGenABITypes.cpp<br>
>> > cfe/trunk/lib/CodeGen/CodeGenAction.cpp<br>
>> > cfe/trunk/lib/CodeGen/CodeGenFunction.cpp<br>
>> > cfe/trunk/lib/CodeGen/CodeGenModule.cpp<br>
>> > cfe/trunk/lib/CodeGen/CodeGenModule.h<br>
>> > cfe/trunk/lib/CodeGen/CodeGenPGO.cpp<br>
>> > cfe/trunk/lib/CodeGen/CodeGenPGO.h<br>
>> > cfe/trunk/lib/CodeGen/ModuleBuilder.cpp<br>
>> > cfe/trunk/lib/Driver/Tools.cpp<br>
>> > cfe/trunk/lib/Frontend/CompilerInvocation.cpp<br>
>> ><br>
>> > Modified: cfe/trunk/include/clang/CodeGen/CodeGenABITypes.h<br>
>> > URL:<br>
>> > <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/CodeGen/CodeGenABITypes.h?rev=214752&r1=214751&r2=214752&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/CodeGen/CodeGenABITypes.h?rev=214752&r1=214751&r2=214752&view=diff</a><br>
>> ><br>
>> > ==============================================================================<br>
>> > --- cfe/trunk/include/clang/CodeGen/CodeGenABITypes.h (original)<br>
>> > +++ cfe/trunk/include/clang/CodeGen/CodeGenABITypes.h Mon Aug 4<br>
>> > 13:41:51 2014<br>
>> > @@ -39,6 +39,7 @@ class CXXRecordDecl;<br>
>> > class CodeGenOptions;<br>
>> > class DiagnosticsEngine;<br>
>> > class ObjCMethodDecl;<br>
>> > +class CoverageSourceInfo;<br>
>> ><br>
>> > namespace CodeGen {<br>
>> > class CGFunctionInfo;<br>
>> > @@ -47,7 +48,8 @@ class CodeGenModule;<br>
>> > class CodeGenABITypes<br>
>> > {<br>
>> > public:<br>
>> > - CodeGenABITypes(ASTContext &C, llvm::Module &M, const<br>
>> > llvm::DataLayout &TD);<br>
>> > + CodeGenABITypes(ASTContext &C, llvm::Module &M, const<br>
>> > llvm::DataLayout &TD,<br>
>> > + CoverageSourceInfo *CoverageInfo = nullptr);<br>
>> > ~CodeGenABITypes();<br>
>> ><br>
>> > /// These methods all forward to methods in the private<br>
>> > implementation class<br>
>> ><br>
>> > Modified: cfe/trunk/include/clang/CodeGen/ModuleBuilder.h<br>
>> > URL:<br>
>> > <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/CodeGen/ModuleBuilder.h?rev=214752&r1=214751&r2=214752&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/CodeGen/ModuleBuilder.h?rev=214752&r1=214751&r2=214752&view=diff</a><br>
>> ><br>
>> > ==============================================================================<br>
>> > --- cfe/trunk/include/clang/CodeGen/ModuleBuilder.h (original)<br>
>> > +++ cfe/trunk/include/clang/CodeGen/ModuleBuilder.h Mon Aug 4 13:41:51<br>
>> > 2014<br>
>> > @@ -24,6 +24,7 @@ namespace llvm {<br>
>> ><br>
>> > namespace clang {<br>
>> > class DiagnosticsEngine;<br>
>> > + class CoverageSourceInfo;<br>
>> > class LangOptions;<br>
>> > class CodeGenOptions;<br>
>> > class TargetOptions;<br>
>> > @@ -44,7 +45,8 @@ namespace clang {<br>
>> > const std::string &ModuleName,<br>
>> > const CodeGenOptions &CGO,<br>
>> > const TargetOptions &TO,<br>
>> > - llvm::LLVMContext& C);<br>
>> > + llvm::LLVMContext& C,<br>
>> > + CoverageSourceInfo *CoverageInfo =<br>
>> > nullptr);<br>
>> > }<br>
>> ><br>
>> > #endif<br>
>> ><br>
>> > Modified: cfe/trunk/include/clang/Driver/Options.td<br>
>> > URL:<br>
>> > <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/Options.td?rev=214752&r1=214751&r2=214752&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/Options.td?rev=214752&r1=214751&r2=214752&view=diff</a><br>
>> ><br>
>> > ==============================================================================<br>
>> > --- cfe/trunk/include/clang/Driver/Options.td (original)<br>
>> > +++ cfe/trunk/include/clang/Driver/Options.td Mon Aug 4 13:41:51 2014<br>
>> > @@ -408,6 +408,9 @@ def fprofile_instr_use : Flag<["-"], "fp<br>
>> > def fprofile_instr_use_EQ : Joined<["-"], "fprofile-instr-use=">,<br>
>> > Group<f_Group>, Flags<[CC1Option]>,<br>
>> > HelpText<"Use instrumentation data for profile-guided<br>
>> > optimization">;<br>
>> > +def fcoverage_mapping : Flag<["-"], "fcoverage-mapping">,<br>
>> > + Group<f_Group>, Flags<[CC1Option]>,<br>
>> > + HelpText<"Generate coverage mapping to enable code coverage<br>
>> > analysis">;<br>
>> ><br>
>> > def fblocks : Flag<["-"], "fblocks">, Group<f_Group>,<br>
>> > Flags<[CC1Option]>,<br>
>> > HelpText<"Enable the 'blocks' language feature">;<br>
>> ><br>
>> > Modified: cfe/trunk/include/clang/Frontend/CodeGenOptions.def<br>
>> > URL:<br>
>> > <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Frontend/CodeGenOptions.def?rev=214752&r1=214751&r2=214752&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Frontend/CodeGenOptions.def?rev=214752&r1=214751&r2=214752&view=diff</a><br>
>> ><br>
>> > ==============================================================================<br>
>> > --- cfe/trunk/include/clang/Frontend/CodeGenOptions.def (original)<br>
>> > +++ cfe/trunk/include/clang/Frontend/CodeGenOptions.def Mon Aug 4<br>
>> > 13:41:51 2014<br>
>> > @@ -88,6 +88,8 @@ VALUE_CODEGENOPT(OptimizeSize, 2, 0) ///<br>
>> ><br>
>> > CODEGENOPT(ProfileInstrGenerate , 1, 0) ///< Instrument code to<br>
>> > generate<br>
>> > ///< execution counts to use<br>
>> > with PGO.<br>
>> > +CODEGENOPT(CoverageMapping , 1, 0) ///< Generate coverage mapping<br>
>> > regions to<br>
>> > + ///< enable code coverage analysis.<br>
>> ><br>
>> > /// If -fpcc-struct-return or -freg-struct-return is specified.<br>
>> > ENUM_CODEGENOPT(StructReturnConvention, StructReturnConventionKind, 2,<br>
>> > SRCK_Default)<br>
>> ><br>
>> > Modified: cfe/trunk/lib/CodeGen/CodeGenABITypes.cpp<br>
>> > URL:<br>
>> > <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenABITypes.cpp?rev=214752&r1=214751&r2=214752&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenABITypes.cpp?rev=214752&r1=214751&r2=214752&view=diff</a><br>
>> ><br>
>> > ==============================================================================<br>
>> > --- cfe/trunk/lib/CodeGen/CodeGenABITypes.cpp (original)<br>
>> > +++ cfe/trunk/lib/CodeGen/CodeGenABITypes.cpp Mon Aug 4 13:41:51 2014<br>
>> > @@ -26,9 +26,11 @@ using namespace CodeGen;<br>
>> ><br>
>> > CodeGenABITypes::CodeGenABITypes(ASTContext &C,<br>
>> > llvm::Module &M,<br>
>> > - const llvm::DataLayout &TD)<br>
>> > + const llvm::DataLayout &TD,<br>
>> > + CoverageSourceInfo *CoverageInfo)<br>
>> > : CGO(new CodeGenOptions),<br>
>> > - CGM(new CodeGen::CodeGenModule(C, *CGO, M, TD, C.getDiagnostics()))<br>
>> > {<br>
>> > + CGM(new CodeGen::CodeGenModule(C, *CGO, M, TD, C.getDiagnostics(),<br>
>> > + CoverageInfo)) {<br>
>> > }<br>
>> ><br>
>> > CodeGenABITypes::~CodeGenABITypes()<br>
>> ><br>
>> > Modified: cfe/trunk/lib/CodeGen/CodeGenAction.cpp<br>
>> > URL:<br>
>> > <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenAction.cpp?rev=214752&r1=214751&r2=214752&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenAction.cpp?rev=214752&r1=214751&r2=214752&view=diff</a><br>
>> ><br>
>> > ==============================================================================<br>
>> > --- cfe/trunk/lib/CodeGen/CodeGenAction.cpp (original)<br>
>> > +++ cfe/trunk/lib/CodeGen/CodeGenAction.cpp Mon Aug 4 13:41:51 2014<br>
>> > @@ -7,6 +7,7 @@<br>
>> > //<br>
>> ><br>
>> > //===----------------------------------------------------------------------===//<br>
>> ><br>
>> > +#include "CoverageMappingGen.h"<br>
>> > #include "clang/CodeGen/CodeGenAction.h"<br>
>> > #include "clang/AST/ASTConsumer.h"<br>
>> > #include "clang/AST/ASTContext.h"<br>
>> > @@ -15,6 +16,7 @@<br>
>> > #include "clang/Basic/FileManager.h"<br>
>> > #include "clang/Basic/SourceManager.h"<br>
>> > #include "clang/Basic/TargetInfo.h"<br>
>> > +#include "clang/Lex/Preprocessor.h"<br>
>> > #include "clang/CodeGen/BackendUtil.h"<br>
>> > #include "clang/CodeGen/ModuleBuilder.h"<br>
>> > #include "clang/Frontend/CompilerInstance.h"<br>
>> > @@ -59,11 +61,13 @@ namespace clang {<br>
>> > const TargetOptions &targetopts,<br>
>> > const LangOptions &langopts, bool TimePasses,<br>
>> > const std::string &infile, llvm::Module<br>
>> > *LinkModule,<br>
>> > - raw_ostream *OS, LLVMContext &C)<br>
>> > + raw_ostream *OS, LLVMContext &C,<br>
>> > + CoverageSourceInfo *CoverageInfo = nullptr)<br>
>> > : Diags(_Diags), Action(action), CodeGenOpts(compopts),<br>
>> > TargetOpts(targetopts), LangOpts(langopts), AsmOutStream(OS),<br>
>> > Context(), LLVMIRGeneration("LLVM IR Generation Time"),<br>
>> > - Gen(CreateLLVMCodeGen(Diags, infile, compopts, targetopts,<br>
>> > C)),<br>
>> > + Gen(CreateLLVMCodeGen(Diags, infile, compopts,<br>
>> > + targetopts, C, CoverageInfo)),<br>
>> > LinkModule(LinkModule) {<br>
>> > llvm::TimePassesIsEnabled = TimePasses;<br>
>> > }<br>
>> > @@ -636,10 +640,17 @@ ASTConsumer *CodeGenAction::CreateASTCon<br>
>> > LinkModuleToUse = ModuleOrErr.get();<br>
>> > }<br>
>> ><br>
>> > + CoverageSourceInfo *CoverageInfo = nullptr;<br>
>> > + // Add the preprocessor callback only when the coverage mapping is<br>
>> > generated.<br>
>> > + if (CI.getCodeGenOpts().CoverageMapping) {<br>
>> > + CoverageInfo = new CoverageSourceInfo;<br>
>> > + CI.getPreprocessor().addPPCallbacks(CoverageInfo);<br>
>> > + }<br>
>> > BEConsumer = new BackendConsumer(BA, CI.getDiagnostics(),<br>
>> > CI.getCodeGenOpts(),<br>
>> > CI.getTargetOpts(),<br>
>> > CI.getLangOpts(),<br>
>> > CI.getFrontendOpts().ShowTimers,<br>
>> > InFile,<br>
>> > - LinkModuleToUse, OS.release(),<br>
>> > *VMContext);<br>
>> > + LinkModuleToUse, OS.release(),<br>
>> > *VMContext,<br>
>> > + CoverageInfo);<br>
>> > return BEConsumer;<br>
>> > }<br>
>> ><br>
>> ><br>
>> > Modified: cfe/trunk/lib/CodeGen/CodeGenFunction.cpp<br>
>> > URL:<br>
>> > <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenFunction.cpp?rev=214752&r1=214751&r2=214752&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenFunction.cpp?rev=214752&r1=214751&r2=214752&view=diff</a><br>
>> ><br>
>> > ==============================================================================<br>
>> > --- cfe/trunk/lib/CodeGen/CodeGenFunction.cpp (original)<br>
>> > +++ cfe/trunk/lib/CodeGen/CodeGenFunction.cpp Mon Aug 4 13:41:51 2014<br>
>> > @@ -829,6 +829,7 @@ void CodeGenFunction::GenerateCode(Globa<br>
>> > StartFunction(GD, ResTy, Fn, FnInfo, Args, Loc,<br>
>> > BodyRange.getBegin());<br>
>> ><br>
>> > // Generate the body of the function.<br>
>> > + PGO.checkGlobalDecl(GD);<br>
>> > PGO.assignRegionCounters(GD.getDecl(), CurFn);<br>
>> > if (isa<CXXDestructorDecl>(FD))<br>
>> > EmitDestructorBody(Args);<br>
>> ><br>
>> > Modified: cfe/trunk/lib/CodeGen/CodeGenModule.cpp<br>
>> > URL:<br>
>> > <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenModule.cpp?rev=214752&r1=214751&r2=214752&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenModule.cpp?rev=214752&r1=214751&r2=214752&view=diff</a><br>
>> ><br>
>> > ==============================================================================<br>
>> > --- cfe/trunk/lib/CodeGen/CodeGenModule.cpp (original)<br>
>> > +++ cfe/trunk/lib/CodeGen/CodeGenModule.cpp Mon Aug 4 13:41:51 2014<br>
>> > @@ -21,6 +21,7 @@<br>
>> > #include "CGOpenMPRuntime.h"<br>
>> > #include "CodeGenFunction.h"<br>
>> > #include "CodeGenPGO.h"<br>
>> > +#include "CoverageMappingGen.h"<br>
>> > #include "CodeGenTBAA.h"<br>
>> > #include "TargetInfo.h"<br>
>> > #include "clang/AST/ASTContext.h"<br>
>> > @@ -74,7 +75,8 @@ static CGCXXABI *createCXXABI(CodeGenMod<br>
>> ><br>
>> > CodeGenModule::CodeGenModule(ASTContext &C, const CodeGenOptions &CGO,<br>
>> > llvm::Module &M, const llvm::DataLayout<br>
>> > &TD,<br>
>> > - DiagnosticsEngine &diags)<br>
>> > + DiagnosticsEngine &diags,<br>
>> > + CoverageSourceInfo *CoverageInfo)<br>
>> > : Context(C), LangOpts(C.getLangOpts()), CodeGenOpts(CGO),<br>
>> > TheModule(M),<br>
>> > Diags(diags), TheDataLayout(TD), Target(C.getTargetInfo()),<br>
>> > ABI(createCXXABI(*this)), VMContext(M.getContext()),<br>
>> > TBAA(nullptr),<br>
>> > @@ -146,6 +148,11 @@ CodeGenModule::CodeGenModule(ASTContext<br>
>> > getDiags().Report(DiagID) << EC.message();<br>
>> > }<br>
>> > }<br>
>> > +<br>
>> > + // If coverage mapping generation is enabled, create the<br>
>> > + // CoverageMappingModuleGen object.<br>
>> > + if (CodeGenOpts.CoverageMapping)<br>
>> > + CoverageMapping.reset(new CoverageMappingModuleGen(*this,<br>
>> > *CoverageInfo));<br>
>> > }<br>
>> ><br>
>> > CodeGenModule::~CodeGenModule() {<br>
>> > @@ -344,6 +351,9 @@ void CodeGenModule::Release() {<br>
>> > EmitCtorList(GlobalDtors, "llvm.global_dtors");<br>
>> > EmitGlobalAnnotations();<br>
>> > EmitStaticExternCAliases();<br>
>> > + EmitDeferredUnusedCoverageMappings();<br>
>> > + if (CoverageMapping)<br>
>> > + CoverageMapping->emit();<br>
>> > emitLLVMUsed();<br>
>> ><br>
>> > if (CodeGenOpts.Autolink &&<br>
>> > @@ -2989,6 +2999,9 @@ void CodeGenModule::EmitTopLevelDecl(Dec<br>
>> > return;<br>
>> ><br>
>> > EmitGlobal(cast<FunctionDecl>(D));<br>
>> > + // Always provide some coverage mapping<br>
>> > + // even for the functions that aren't emitted.<br>
>> > + AddDeferredUnusedCoverageMapping(D);<br>
>> > break;<br>
>> ><br>
>> > case Decl::Var:<br>
>> > @@ -3138,6 +3151,80 @@ void CodeGenModule::EmitTopLevelDecl(Dec<br>
>> > }<br>
>> > }<br>
>> ><br>
>> > +void CodeGenModule::AddDeferredUnusedCoverageMapping(Decl *D) {<br>
>> > + // Do we need to generate coverage mapping?<br>
>> > + if (!CodeGenOpts.CoverageMapping)<br>
>> > + return;<br>
>> > + switch (D->getKind()) {<br>
>> > + case Decl::CXXConversion:<br>
>> > + case Decl::CXXMethod:<br>
>> > + case Decl::Function:<br>
>> > + case Decl::ObjCMethod:<br>
>> > + case Decl::CXXConstructor:<br>
>> > + case Decl::CXXDestructor: {<br>
>> > + if (!cast<FunctionDecl>(D)->hasBody())<br>
>> > + return;<br>
>> > + auto I = DeferredEmptyCoverageMappingDecls.find(D);<br>
>> > + if (I == DeferredEmptyCoverageMappingDecls.end())<br>
>> > + DeferredEmptyCoverageMappingDecls[D] = true;<br>
>> > + break;<br>
>> > + }<br>
>> > + default:<br>
>> > + break;<br>
>> > + };<br>
>> > +}<br>
>> > +<br>
>> > +void CodeGenModule::ClearUnusedCoverageMapping(const Decl *D) {<br>
>> > + // Do we need to generate coverage mapping?<br>
>> > + if (!CodeGenOpts.CoverageMapping)<br>
>> > + return;<br>
>> > + if (const auto *Fn = dyn_cast<FunctionDecl>(D)) {<br>
>> > + if (Fn->isTemplateInstantiation())<br>
>> > +<br>
>> > ClearUnusedCoverageMapping(Fn->getTemplateInstantiationPattern());<br>
>> > + }<br>
>> > + auto I = DeferredEmptyCoverageMappingDecls.find(D);<br>
>> > + if (I == DeferredEmptyCoverageMappingDecls.end())<br>
>> > + DeferredEmptyCoverageMappingDecls[D] = false;<br>
>> > + else<br>
>> > + I->second = false;<br>
>> > +}<br>
>> > +<br>
>> > +void CodeGenModule::EmitDeferredUnusedCoverageMappings() {<br>
>> > + for (const auto I : DeferredEmptyCoverageMappingDecls) {<br>
>> > + if (!I.second)<br>
>> > + continue;<br>
>> > + const auto *D = I.first;<br>
>> > + switch (D->getKind()) {<br>
>> > + case Decl::CXXConversion:<br>
>> > + case Decl::CXXMethod:<br>
>> > + case Decl::Function:<br>
>> > + case Decl::ObjCMethod: {<br>
>> > + CodeGenPGO PGO(*this);<br>
>> > + GlobalDecl GD(cast<FunctionDecl>(D));<br>
>> > + PGO.emitEmptyCounterMapping(D, getMangledName(GD),<br>
>> > + getFunctionLinkage(GD));<br>
>> > + break;<br>
>> > + }<br>
>> > + case Decl::CXXConstructor: {<br>
>> > + CodeGenPGO PGO(*this);<br>
>> > + GlobalDecl GD(cast<CXXConstructorDecl>(D), Ctor_Base);<br>
>> > + PGO.emitEmptyCounterMapping(D, getMangledName(GD),<br>
>> > + getFunctionLinkage(GD));<br>
>> > + break;<br>
>> > + }<br>
>> > + case Decl::CXXDestructor: {<br>
>> > + CodeGenPGO PGO(*this);<br>
>> > + GlobalDecl GD(cast<CXXDestructorDecl>(D), Dtor_Base);<br>
>> > + PGO.emitEmptyCounterMapping(D, getMangledName(GD),<br>
>> > + getFunctionLinkage(GD));<br>
>> > + break;<br>
>> > + }<br>
>> > + default:<br>
>> > + break;<br>
>> > + };<br>
>> > + }<br>
>> > +}<br>
>> > +<br>
>> > /// Turns the given pointer into a constant.<br>
>> > static llvm::Constant *GetPointerConstant(llvm::LLVMContext &Context,<br>
>> > const void *Ptr) {<br>
>> ><br>
>> > Modified: cfe/trunk/lib/CodeGen/CodeGenModule.h<br>
>> > URL:<br>
>> > <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenModule.h?rev=214752&r1=214751&r2=214752&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenModule.h?rev=214752&r1=214751&r2=214752&view=diff</a><br>
>> ><br>
>> > ==============================================================================<br>
>> > --- cfe/trunk/lib/CodeGen/CodeGenModule.h (original)<br>
>> > +++ cfe/trunk/lib/CodeGen/CodeGenModule.h Mon Aug 4 13:41:51 2014<br>
>> > @@ -73,6 +73,7 @@ class DiagnosticsEngine;<br>
>> > class AnnotateAttr;<br>
>> > class CXXDestructorDecl;<br>
>> > class Module;<br>
>> > +class CoverageSourceInfo;<br>
>> ><br>
>> > namespace CodeGen {<br>
>> ><br>
>> > @@ -87,6 +88,7 @@ class CGOpenMPRuntime;<br>
>> > class CGCUDARuntime;<br>
>> > class BlockFieldFlags;<br>
>> > class FunctionArgList;<br>
>> > +class CoverageMappingModuleGen;<br>
>> ><br>
>> > struct OrderGlobalInits {<br>
>> > unsigned int priority;<br>
>> > @@ -477,10 +479,15 @@ class CodeGenModule : public CodeGenType<br>
>> > std::unique_ptr<SanitizerMetadata> SanitizerMD;<br>
>> ><br>
>> > /// @}<br>
>> > +<br>
>> > + llvm::DenseMap<const Decl *, bool> DeferredEmptyCoverageMappingDecls;<br>
>> > +<br>
>> > + std::unique_ptr<CoverageMappingModuleGen> CoverageMapping;<br>
>> > public:<br>
>> > CodeGenModule(ASTContext &C, const CodeGenOptions &CodeGenOpts,<br>
>> > llvm::Module &M, const llvm::DataLayout &TD,<br>
>> > - DiagnosticsEngine &Diags);<br>
>> > + DiagnosticsEngine &Diags,<br>
>> > + CoverageSourceInfo *CoverageInfo = nullptr);<br>
>> ><br>
>> > ~CodeGenModule();<br>
>> ><br>
>> > @@ -529,6 +536,10 @@ public:<br>
>> > InstrProfStats &getPGOStats() { return PGOStats; }<br>
>> > llvm::IndexedInstrProfReader *getPGOReader() const { return<br>
>> > PGOReader.get(); }<br>
>> ><br>
>> > + CoverageMappingModuleGen *getCoverageMapping() const {<br>
>> > + return CoverageMapping.get();<br>
>> > + }<br>
>> > +<br>
>> > llvm::Constant *getStaticLocalDeclAddress(const VarDecl *D) {<br>
>> > return StaticLocalDeclMap[D];<br>
>> > }<br>
>> > @@ -815,6 +826,18 @@ public:<br>
>> > /// Emit code for a single top level declaration.<br>
>> > void EmitTopLevelDecl(Decl *D);<br>
>> ><br>
>> > + /// \brief Stored a deferred empty coverage mapping for an unused<br>
>> > + /// and thus uninstrumented top level declaration.<br>
>> > + void AddDeferredUnusedCoverageMapping(Decl *D);<br>
>> > +<br>
>> > + /// \brief Remove the deferred empty coverage mapping as this<br>
>> > + /// declaration is actually instrumented.<br>
>> > + void ClearUnusedCoverageMapping(const Decl *D);<br>
>> > +<br>
>> > + /// \brief Emit all the deferred coverage mappings<br>
>> > + /// for the uninstrumented functions.<br>
>> > + void EmitDeferredUnusedCoverageMappings();<br>
>> > +<br>
>> > /// Tell the consumer that this variable has been instantiated.<br>
>> > void HandleCXXStaticMemberVarInstantiation(VarDecl *VD);<br>
>> ><br>
>> ><br>
>> > Modified: cfe/trunk/lib/CodeGen/CodeGenPGO.cpp<br>
>> > URL:<br>
>> > <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenPGO.cpp?rev=214752&r1=214751&r2=214752&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenPGO.cpp?rev=214752&r1=214751&r2=214752&view=diff</a><br>
>> ><br>
>> > ==============================================================================<br>
>> > --- cfe/trunk/lib/CodeGen/CodeGenPGO.cpp (original)<br>
>> > +++ cfe/trunk/lib/CodeGen/CodeGenPGO.cpp Mon Aug 4 13:41:51 2014<br>
>> > @@ -13,6 +13,7 @@<br>
>> ><br>
>> > #include "CodeGenPGO.h"<br>
>> > #include "CodeGenFunction.h"<br>
>> > +#include "CoverageMappingGen.h"<br>
>> > #include "clang/AST/RecursiveASTVisitor.h"<br>
>> > #include "clang/AST/StmtVisitor.h"<br>
>> > #include "llvm/IR/MDBuilder.h"<br>
>> > @@ -24,8 +25,9 @@<br>
>> > using namespace clang;<br>
>> > using namespace CodeGen;<br>
>> ><br>
>> > -void CodeGenPGO::setFuncName(llvm::Function *Fn) {<br>
>> > - RawFuncName = Fn->getName();<br>
>> > +void CodeGenPGO::setFuncName(StringRef Name,<br>
>> > + llvm::GlobalValue::LinkageTypes Linkage) {<br>
>> > + RawFuncName = Name;<br>
>> ><br>
>> > // Function names may be prefixed with a binary '1' to indicate<br>
>> > // that the backend should not modify the symbols due to any platform<br>
>> > @@ -33,7 +35,7 @@ void CodeGenPGO::setFuncName(llvm::Funct<br>
>> > if (RawFuncName[0] == '\1')<br>
>> > RawFuncName = RawFuncName.substr(1);<br>
>> ><br>
>> > - if (!Fn->hasLocalLinkage()) {<br>
>> > + if (!llvm::GlobalValue::isLocalLinkage(Linkage)) {<br>
>> > PrefixedFuncName.reset(new std::string(RawFuncName));<br>
>> > return;<br>
>> > }<br>
>> > @@ -49,6 +51,27 @@ void CodeGenPGO::setFuncName(llvm::Funct<br>
>> > PrefixedFuncName->append(RawFuncName);<br>
>> > }<br>
>> ><br>
>> > +void CodeGenPGO::setFuncName(llvm::Function *Fn) {<br>
>> > + setFuncName(Fn->getName(), Fn->getLinkage());<br>
>> > +}<br>
>> > +<br>
>> > +void CodeGenPGO::setVarLinkage(llvm::GlobalValue::LinkageTypes Linkage)<br>
>> > {<br>
>> > + // Set the linkage for variables based on the function linkage.<br>
>> > Usually, we<br>
>> > + // want to match it, but available_externally and extern_weak both<br>
>> > have the<br>
>> > + // wrong semantics.<br>
>> > + VarLinkage = Linkage;<br>
>> > + switch (VarLinkage) {<br>
>> > + case llvm::GlobalValue::ExternalWeakLinkage:<br>
>> > + VarLinkage = llvm::GlobalValue::LinkOnceAnyLinkage;<br>
>> > + break;<br>
>> > + case llvm::GlobalValue::AvailableExternallyLinkage:<br>
>> > + VarLinkage = llvm::GlobalValue::LinkOnceODRLinkage;<br>
>> > + break;<br>
>> > + default:<br>
>> > + break;<br>
>> > + }<br>
>> > +}<br>
>> > +<br>
>> > static llvm::Function *getRegisterFunc(CodeGenModule &CGM) {<br>
>> > return<br>
>> > CGM.getModule().getFunction("__llvm_profile_register_functions");<br>
>> > }<br>
>> > @@ -120,37 +143,48 @@ llvm::GlobalVariable *CodeGenPGO::buildD<br>
>> > auto *Int64Ty = llvm::Type::getInt64Ty(Ctx);<br>
>> > auto *Int8PtrTy = llvm::Type::getInt8PtrTy(Ctx);<br>
>> > auto *Int64PtrTy = llvm::Type::getInt64PtrTy(Ctx);<br>
>> > - llvm::Type *DataTypes[] = {<br>
>> > - Int32Ty, Int32Ty, Int64Ty, Int8PtrTy, Int64PtrTy<br>
>> > - };<br>
>> > - auto *DataTy = llvm::StructType::get(Ctx, makeArrayRef(DataTypes));<br>
>> > - llvm::Constant *DataVals[] = {<br>
>> > - llvm::ConstantInt::get(Int32Ty, getFuncName().size()),<br>
>> > - llvm::ConstantInt::get(Int32Ty, NumRegionCounters),<br>
>> > - llvm::ConstantInt::get(Int64Ty, FunctionHash),<br>
>> > - llvm::ConstantExpr::getBitCast(Name, Int8PtrTy),<br>
>> > - llvm::ConstantExpr::getBitCast(RegionCounters, Int64PtrTy)<br>
>> > - };<br>
>> > - auto *Data =<br>
>> > - new llvm::GlobalVariable(CGM.getModule(), DataTy, true, VarLinkage,<br>
>> > - llvm::ConstantStruct::get(DataTy,<br>
>> > DataVals),<br>
>> > - getFuncVarName("data"));<br>
>> > -<br>
>> > - // All the data should be packed into an array in its own section.<br>
>> > - Data->setSection(getDataSection(CGM));<br>
>> > - Data->setAlignment(8);<br>
>> > + llvm::GlobalVariable *Data = nullptr;<br>
>> > + if (RegionCounters) {<br>
>> > + llvm::Type *DataTypes[] = {<br>
>> > + Int32Ty, Int32Ty, Int64Ty, Int8PtrTy, Int64PtrTy<br>
>> > + };<br>
>> > + auto *DataTy = llvm::StructType::get(Ctx, makeArrayRef(DataTypes));<br>
>> > + llvm::Constant *DataVals[] = {<br>
>> > + llvm::ConstantInt::get(Int32Ty, getFuncName().size()),<br>
>> > + llvm::ConstantInt::get(Int32Ty, NumRegionCounters),<br>
>> > + llvm::ConstantInt::get(Int64Ty, FunctionHash),<br>
>> > + llvm::ConstantExpr::getBitCast(Name, Int8PtrTy),<br>
>> > + llvm::ConstantExpr::getBitCast(RegionCounters, Int64PtrTy)<br>
>> > + };<br>
>> > + Data =<br>
>> > + new llvm::GlobalVariable(CGM.getModule(), DataTy, true,<br>
>> > VarLinkage,<br>
>> > + llvm::ConstantStruct::get(DataTy,<br>
>> > DataVals),<br>
>> > + getFuncVarName("data"));<br>
>> > +<br>
>> > + // All the data should be packed into an array in its own section.<br>
>> > + Data->setSection(getDataSection(CGM));<br>
>> > + Data->setAlignment(8);<br>
>> > + }<br>
>> > +<br>
>> > + // Create coverage mapping data variable.<br>
>> > + if (!CoverageMapping.empty())<br>
>> > + CGM.getCoverageMapping()->addFunctionMappingRecord(Name,<br>
>> > +<br>
>> > getFuncName().size(),<br>
>> > +<br>
>> > CoverageMapping);<br>
>> ><br>
>> > // Hide all these symbols so that we correctly get a copy for each<br>
>> > // executable. The profile format expects names and counters to be<br>
>> > // contiguous, so references into shared objects would be invalid.<br>
>> > if (!llvm::GlobalValue::isLocalLinkage(VarLinkage)) {<br>
>> > Name->setVisibility(llvm::GlobalValue::HiddenVisibility);<br>
>> > - Data->setVisibility(llvm::GlobalValue::HiddenVisibility);<br>
>> > - RegionCounters->setVisibility(llvm::GlobalValue::HiddenVisibility);<br>
>> > + if (Data) {<br>
>> > + Data->setVisibility(llvm::GlobalValue::HiddenVisibility);<br>
>> > +<br>
>> > RegionCounters->setVisibility(llvm::GlobalValue::HiddenVisibility);<br>
>> > + }<br>
>> > }<br>
>> ><br>
>> > // Make sure the data doesn't get deleted.<br>
>> > - CGM.addUsedGlobal(Data);<br>
>> > + if (Data) CGM.addUsedGlobal(Data);<br>
>> > return Data;<br>
>> > }<br>
>> ><br>
>> > @@ -807,6 +841,20 @@ static void emitRuntimeHook(CodeGenModul<br>
>> > CGM.addUsedGlobal(User);<br>
>> > }<br>
>> ><br>
>> > +void CodeGenPGO::checkGlobalDecl(GlobalDecl GD) {<br>
>> > + // Make sure we only emit coverage mapping for one<br>
>> > constructor/destructor.<br>
>> > + // Clang emits several functions for the constructor and the<br>
>> > destructor of<br>
>> > + // a class. Every function is instrumented, but we only want to<br>
>> > provide<br>
>> > + // coverage for one of them. Because of that we only emit the<br>
>> > coverage mapping<br>
>> > + // for the base constructor/destructor.<br>
>> > + if ((isa<CXXConstructorDecl>(GD.getDecl()) &&<br>
>> > + GD.getCtorType() != Ctor_Base) ||<br>
>> > + (isa<CXXDestructorDecl>(GD.getDecl()) &&<br>
>> > + GD.getDtorType() != Dtor_Base)) {<br>
>> > + SkipCoverageMapping = true;<br>
>> > + }<br>
>> > +}<br>
>> > +<br>
>> > void CodeGenPGO::assignRegionCounters(const Decl *D, llvm::Function<br>
>> > *Fn) {<br>
>> > bool InstrumentRegions = CGM.getCodeGenOpts().ProfileInstrGenerate;<br>
>> > llvm::IndexedInstrProfReader *PGOReader = CGM.getPGOReader();<br>
>> > @@ -814,27 +862,16 @@ void CodeGenPGO::assignRegionCounters(co<br>
>> > return;<br>
>> > if (D->isImplicit())<br>
>> > return;<br>
>> > + CGM.ClearUnusedCoverageMapping(D);<br>
>> > setFuncName(Fn);<br>
>> > -<br>
>> > - // Set the linkage for variables based on the function linkage.<br>
>> > Usually, we<br>
>> > - // want to match it, but available_externally and extern_weak both<br>
>> > have the<br>
>> > - // wrong semantics.<br>
>> > - VarLinkage = Fn->getLinkage();<br>
>> > - switch (VarLinkage) {<br>
>> > - case llvm::GlobalValue::ExternalWeakLinkage:<br>
>> > - VarLinkage = llvm::GlobalValue::LinkOnceAnyLinkage;<br>
>> > - break;<br>
>> > - case llvm::GlobalValue::AvailableExternallyLinkage:<br>
>> > - VarLinkage = llvm::GlobalValue::LinkOnceODRLinkage;<br>
>> > - break;<br>
>> > - default:<br>
>> > - break;<br>
>> > - }<br>
>> > + setVarLinkage(Fn->getLinkage());<br>
>> ><br>
>> > mapRegionCounters(D);<br>
>> > if (InstrumentRegions) {<br>
>> > emitRuntimeHook(CGM);<br>
>> > emitCounterVariables();<br>
>> > + if (CGM.getCodeGenOpts().CoverageMapping)<br>
>> > + emitCounterRegionMapping(D);<br>
>> > }<br>
>> > if (PGOReader) {<br>
>> > SourceManager &SM = CGM.getContext().getSourceManager();<br>
>> > @@ -860,6 +897,45 @@ void CodeGenPGO::mapRegionCounters(const<br>
>> > FunctionHash = Walker.Hash.finalize();<br>
>> > }<br>
>> ><br>
>> > +void CodeGenPGO::emitCounterRegionMapping(const Decl *D) {<br>
>> > + if (SkipCoverageMapping)<br>
>> > + return;<br>
>> > + // Don't map the functions inside the system headers<br>
>> > + auto Loc = D->getBody()->getLocStart();<br>
>> > + if (CGM.getContext().getSourceManager().isInSystemHeader(Loc))<br>
>> > + return;<br>
>> > +<br>
>> > + llvm::raw_string_ostream OS(CoverageMapping);<br>
>> > + CoverageMappingGen MappingGen(*CGM.getCoverageMapping(),<br>
>> > + CGM.getContext().getSourceManager(),<br>
>> > + CGM.getLangOpts(),<br>
>> > RegionCounterMap.get(),<br>
>> > + NumRegionCounters);<br>
>> > + MappingGen.emitCounterMapping(D, OS);<br>
>> > + OS.flush();<br>
>> > +}<br>
>> > +<br>
>> > +void<br>
>> > +CodeGenPGO::emitEmptyCounterMapping(const Decl *D, StringRef FuncName,<br>
>> > + llvm::GlobalValue::LinkageTypes<br>
>> > Linkage) {<br>
>> > + if (SkipCoverageMapping)<br>
>> > + return;<br>
>> > + setFuncName(FuncName, Linkage);<br>
>> > + setVarLinkage(Linkage);<br>
>> > +<br>
>> > + // Don't map the functions inside the system headers<br>
>> > + auto Loc = D->getBody()->getLocStart();<br>
>> > + if (CGM.getContext().getSourceManager().isInSystemHeader(Loc))<br>
>> > + return;<br>
>> > +<br>
>> > + llvm::raw_string_ostream OS(CoverageMapping);<br>
>> > + CoverageMappingGen MappingGen(*CGM.getCoverageMapping(),<br>
>> > + CGM.getContext().getSourceManager(),<br>
>> > + CGM.getLangOpts());<br>
>> > + MappingGen.emitEmptyMapping(D, OS);<br>
>> > + OS.flush();<br>
>> > + buildDataVar();<br>
>> > +}<br>
>> > +<br>
>> > void CodeGenPGO::computeRegionCounts(const Decl *D) {<br>
>> > StmtCountMap.reset(new llvm::DenseMap<const Stmt *, uint64_t>);<br>
>> > ComputeRegionCounts Walker(*StmtCountMap, *this);<br>
>> ><br>
>> > Modified: cfe/trunk/lib/CodeGen/CodeGenPGO.h<br>
>> > URL:<br>
>> > <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenPGO.h?rev=214752&r1=214751&r2=214752&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenPGO.h?rev=214752&r1=214751&r2=214752&view=diff</a><br>
>> ><br>
>> > ==============================================================================<br>
>> > --- cfe/trunk/lib/CodeGen/CodeGenPGO.h (original)<br>
>> > +++ cfe/trunk/lib/CodeGen/CodeGenPGO.h Mon Aug 4 13:41:51 2014<br>
>> > @@ -42,11 +42,16 @@ private:<br>
>> > std::unique_ptr<llvm::DenseMap<const Stmt *, uint64_t>> StmtCountMap;<br>
>> > std::unique_ptr<std::vector<uint64_t>> RegionCounts;<br>
>> > uint64_t CurrentRegionCount;<br>
>> > + std::string CoverageMapping;<br>
>> > + /// \brief A flag that is set to true when this function doesn't need<br>
>> > + /// to have coverage mapping data.<br>
>> > + bool SkipCoverageMapping;<br>
>> ><br>
>> > public:<br>
>> > CodeGenPGO(CodeGenModule &CGM)<br>
>> > : CGM(CGM), NumRegionCounters(0), FunctionHash(0),<br>
>> > - RegionCounters(nullptr), CurrentRegionCount(0) {}<br>
>> > + RegionCounters(nullptr), CurrentRegionCount(0),<br>
>> > + SkipCoverageMapping(false) {}<br>
>> ><br>
>> > /// Whether or not we have PGO region data for the current function.<br>
>> > This is<br>
>> > /// false both when we have no data at all and when our data has been<br>
>> > @@ -99,6 +104,8 @@ public:<br>
>> > llvm::MDNode *createBranchWeights(ArrayRef<uint64_t> Weights);<br>
>> > llvm::MDNode *createLoopWeights(const Stmt *Cond, RegionCounter<br>
>> > &Cnt);<br>
>> ><br>
>> > + /// Check if we need to emit coverage mapping for a given declaration<br>
>> > + void checkGlobalDecl(GlobalDecl GD);<br>
>> > /// Assign counters to regions and configure them for PGO of a given<br>
>> > /// function. Does nothing if instrumentation is not enabled and<br>
>> > either<br>
>> > /// generates global variables or associates PGO data with each of<br>
>> > the<br>
>> > @@ -111,9 +118,14 @@ public:<br>
>> > void destroyRegionCounters();<br>
>> > /// Emit static initialization code, if any.<br>
>> > static llvm::Function *emitInitialization(CodeGenModule &CGM);<br>
>> > -<br>
>> > + /// Emit a coverage mapping range with a counter zero<br>
>> > + /// for an unused declaration.<br>
>> > + void emitEmptyCounterMapping(const Decl *D, StringRef FuncName,<br>
>> > + llvm::GlobalValue::LinkageTypes<br>
>> > Linkage);<br>
>> > private:<br>
>> > void setFuncName(llvm::Function *Fn);<br>
>> > + void setFuncName(StringRef Name, llvm::GlobalValue::LinkageTypes<br>
>> > Linkage);<br>
>> > + void setVarLinkage(llvm::GlobalValue::LinkageTypes Linkage);<br>
>> > void mapRegionCounters(const Decl *D);<br>
>> > void computeRegionCounts(const Decl *D);<br>
>> > void applyFunctionAttributes(llvm::IndexedInstrProfReader *PGOReader,<br>
>> > @@ -122,6 +134,7 @@ private:<br>
>> > bool IsInMainFile);<br>
>> > void emitCounterVariables();<br>
>> > llvm::GlobalVariable *buildDataVar();<br>
>> > + void emitCounterRegionMapping(const Decl *D);<br>
>> ><br>
>> > /// Emit code to increment the counter at the given index<br>
>> > void emitCounterIncrement(CGBuilderTy &Builder, unsigned Counter);<br>
>> ><br>
>> > Added: cfe/trunk/lib/CodeGen/CoverageMappingGen.cpp<br>
>> > URL:<br>
>> > <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CoverageMappingGen.cpp?rev=214752&view=auto" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CoverageMappingGen.cpp?rev=214752&view=auto</a><br>
>> ><br>
>> > ==============================================================================<br>
>> > --- cfe/trunk/lib/CodeGen/CoverageMappingGen.cpp (added)<br>
>> > +++ cfe/trunk/lib/CodeGen/CoverageMappingGen.cpp Mon Aug 4 13:41:51<br>
>> > 2014<br>
>> > @@ -0,0 +1,1166 @@<br>
>> > +//===--- CoverageMappingGen.cpp - Coverage mapping generation ---*- C++<br>
>> > -*-===//<br>
>> > +//<br>
>> > +// The LLVM Compiler Infrastructure<br>
>> > +//<br>
>> > +// This file is distributed under the University of Illinois Open<br>
>> > Source<br>
>> > +// License. See LICENSE.TXT for details.<br>
>> > +//<br>
>> ><br>
>> > +//===----------------------------------------------------------------------===//<br>
>> > +//<br>
>> > +// Instrumentation-based code coverage mapping generator<br>
>> > +//<br>
>> ><br>
>> > +//===----------------------------------------------------------------------===//<br>
>> > +<br>
>> > +#include "CoverageMappingGen.h"<br>
>> > +#include "CodeGenFunction.h"<br>
>> > +#include "clang/AST/StmtVisitor.h"<br>
>> > +#include "clang/Lex/Lexer.h"<br>
>> > +#include "llvm/ProfileData/InstrProfReader.h"<br>
>> > +#include "llvm/ProfileData/CoverageMapping.h"<br>
>> > +#include "llvm/ProfileData/CoverageMappingWriter.h"<br>
>> > +#include "llvm/Support/FileSystem.h"<br>
>> > +<br>
>> > +using namespace clang;<br>
>> > +using namespace CodeGen;<br>
>> > +using namespace llvm::coverage;<br>
>> > +<br>
>> > +void CoverageSourceInfo::SourceRangeSkipped(SourceRange Range) {<br>
>> > + SkippedRanges.push_back(Range);<br>
>> > +}<br>
>> > +<br>
>> > +namespace {<br>
>> > +<br>
>> > +/// \brief A region of source code that can be mapped to a counter.<br>
>> > +struct SourceMappingRegion {<br>
>> > + enum RegionFlags {<br>
>> > + /// \brief This region won't be emitted if it wasn't extended.<br>
>> > + /// This is useful so that we won't emit source ranges for single<br>
>> > tokens<br>
>> > + /// that we don't really care that much about, like:<br>
>> > + /// the '(' token in #define MACRO (<br>
>> > + IgnoreIfNotExtended = 0x0001,<br>
>> > + };<br>
>> > +<br>
>> > + FileID File, MacroArgumentFile;<br>
>> > +<br>
>> > + Counter Count;<br>
>> > +<br>
>> > + /// \brief A statement that initiated the count of Zero.<br>
>> > + ///<br>
>> > + /// This initiator statement is useful to prevent merging of<br>
>> > unreachable<br>
>> > + /// regions with different statements that caused the counter to<br>
>> > become<br>
>> > + /// unreachable.<br>
>> > + const Stmt *UnreachableInitiator;<br>
>> > +<br>
>> > + /// \brief A statement that separates certain mapping regions into<br>
>> > groups.<br>
>> > + ///<br>
>> > + /// The group statement is sometimes useful when we are emitting the<br>
>> > source<br>
>> > + /// regions not in their correct lexical order, e.g. the regions for<br>
>> > the<br>
>> > + /// incrementation expression in the 'for' construct. By marking the<br>
>> > regions<br>
>> > + /// in the incrementation expression with the group statement, we<br>
>> > avoid the<br>
>> > + /// merging of the regions from the incrementation expression and the<br>
>> > loop's<br>
>> > + /// body.<br>
>> > + const Stmt *Group;<br>
>> > +<br>
>> > + /// \brief The region's starting location.<br>
>> > + SourceLocation LocStart;<br>
>> > +<br>
>> > + /// \brief The region's ending location.<br>
>> > + SourceLocation LocEnd, AlternativeLocEnd;<br>
>> > + unsigned Flags;<br>
>> > + CounterMappingRegion::RegionKind Kind;<br>
>> > +<br>
>> > + SourceMappingRegion(FileID File, FileID MacroArgumentFile, Counter<br>
>> > Count,<br>
>> > + const Stmt *UnreachableInitiator, const Stmt<br>
>> > *Group,<br>
>> > + SourceLocation LocStart, SourceLocation LocEnd,<br>
>> > + unsigned Flags = 0,<br>
>> > + CounterMappingRegion::RegionKind Kind =<br>
>> > + CounterMappingRegion::CodeRegion)<br>
>> > + : File(File), MacroArgumentFile(MacroArgumentFile), Count(Count),<br>
>> > + UnreachableInitiator(UnreachableInitiator), Group(Group),<br>
>> > + LocStart(LocStart), LocEnd(LocEnd),<br>
>> > AlternativeLocEnd(LocStart),<br>
>> > + Flags(Flags), Kind(Kind) {}<br>
>> > +<br>
>> > + bool hasFlag(RegionFlags Flag) const { return (Flags & Flag) != 0; }<br>
>> > +<br>
>> > + void setFlag(RegionFlags Flag) { Flags |= Flag; }<br>
>> > +<br>
>> > + void clearFlag(RegionFlags Flag) { Flags &= ~Flag; }<br>
>> > +<br>
>> > + /// \brief Return true if two regions can be merged together.<br>
>> > + bool isMergeable(SourceMappingRegion &R) {<br>
>> > + return File == R.File && MacroArgumentFile == R.MacroArgumentFile<br>
>> > &&<br>
>> > + Count == R.Count && UnreachableInitiator ==<br>
>> > R.UnreachableInitiator &&<br>
>> > + Group == R.Group && Kind == R.Kind;<br>
>> > + }<br>
>> > +<br>
>> > + /// \brief Merge two regions by extending the 'this' region to cover<br>
>> > the<br>
>> > + /// given region.<br>
>> > + void mergeByExtendingTo(SourceMappingRegion &R) {<br>
>> > + LocEnd = R.LocEnd;<br>
>> > + AlternativeLocEnd = R.LocStart;<br>
>> > + if (hasFlag(IgnoreIfNotExtended))<br>
>> > + clearFlag(IgnoreIfNotExtended);<br>
>> > + }<br>
>> > +};<br>
>> > +<br>
>> > +/// \brief The state of the coverage mapping builder.<br>
>> > +struct SourceMappingState {<br>
>> > + Counter CurrentRegionCount;<br>
>> > + const Stmt *CurrentSourceGroup;<br>
>> > + const Stmt *CurrentUnreachableRegionInitiator;<br>
>> > +<br>
>> > + SourceMappingState(Counter CurrentRegionCount, const Stmt<br>
>> > *CurrentSourceGroup,<br>
>> > + const Stmt *CurrentUnreachableRegionInitiator)<br>
>> > + : CurrentRegionCount(CurrentRegionCount),<br>
>> > + CurrentSourceGroup(CurrentSourceGroup),<br>
>> > +<br>
>> > CurrentUnreachableRegionInitiator(CurrentUnreachableRegionInitiator) {}<br>
>> > +};<br>
>> > +<br>
>> > +/// \brief Provides the common functionality for the different<br>
>> > +/// coverage mapping region builders.<br>
>> > +class CoverageMappingBuilder {<br>
>> > +public:<br>
>> > + CoverageMappingModuleGen &CVM;<br>
>> > + SourceManager &SM;<br>
>> > + const LangOptions &LangOpts;<br>
>> > +<br>
>> > +private:<br>
>> > + struct FileInfo {<br>
>> > + /// \brief The file id that will be used by the coverage mapping<br>
>> > system.<br>
>> > + unsigned CovMappingFileID;<br>
>> > + const FileEntry *Entry;<br>
>> > +<br>
>> > + FileInfo(unsigned CovMappingFileID, const FileEntry *Entry)<br>
>> > + : CovMappingFileID(CovMappingFileID), Entry(Entry) {}<br>
>> > + };<br>
>> > +<br>
>> > + /// \brief This mapping maps clang's FileIDs to file ids used<br>
>> > + /// by the coverage mapping system and clang's file entries.<br>
>> > + llvm::SmallDenseMap<FileID, FileInfo, 8> FileIDMapping;<br>
>> > +<br>
>> > +public:<br>
>> > + /// \brief The statement that corresponds to the current source<br>
>> > group.<br>
>> > + const Stmt *CurrentSourceGroup;<br>
>> > +<br>
>> > + /// \brief The statement the initiated the current unreachable<br>
>> > region.<br>
>> > + const Stmt *CurrentUnreachableRegionInitiator;<br>
>> > +<br>
>> > + /// \brief The coverage mapping regions for this function<br>
>> > + llvm::SmallVector<CounterMappingRegion, 32> MappingRegions;<br>
>> > + /// \brief The source mapping regions for this function.<br>
>> > + llvm::SmallVector<SourceMappingRegion, 32> SourceRegions;<br>
>> > +<br>
>> > + CoverageMappingBuilder(CoverageMappingModuleGen &CVM, SourceManager<br>
>> > &SM,<br>
>> > + const LangOptions &LangOpts)<br>
>> > + : CVM(CVM), SM(SM), LangOpts(LangOpts),<br>
>> > + CurrentSourceGroup(nullptr),<br>
>> > + CurrentUnreachableRegionInitiator(nullptr) {}<br>
>> > +<br>
>> > + /// \brief Return the precise end location for the given token.<br>
>> > + SourceLocation getPreciseTokenLocEnd(SourceLocation Loc) {<br>
>> > + return Lexer::getLocForEndOfToken(SM.getSpellingLoc(Loc), 0, SM,<br>
>> > LangOpts);<br>
>> > + }<br>
>> > +<br>
>> > + /// \brief Create the mapping that maps from the function's file ids<br>
>> > to<br>
>> > + /// the indices for the translation unit's filenames.<br>
>> > + void createFileIDMapping(SmallVectorImpl<unsigned> &Mapping) {<br>
>> > + Mapping.resize(FileIDMapping.size(), 0);<br>
>> > + for (const auto &I : FileIDMapping)<br>
>> > + Mapping[I.second.CovMappingFileID] =<br>
>> > CVM.getFileID(I.second.Entry);<br>
>> > + }<br>
>> > +<br>
>> > + /// \brief Get the coverage mapping file id that corresponds to the<br>
>> > given<br>
>> > + /// clang file id. If such file id doesn't exist, it gets added to<br>
>> > the<br>
>> > + /// mapping that maps from clang's file ids to coverage mapping file<br>
>> > ids.<br>
>> > + /// Return true if there was an error getting the coverage mapping<br>
>> > file id.<br>
>> > + /// An example of an when this function fails is when the region<br>
>> > tries<br>
>> > + /// to get a coverage file id for a location in a built-in macro.<br>
>> > + bool getCoverageFileID(SourceLocation LocStart, FileID File,<br>
>> > + FileID SpellingFile, unsigned &Result) {<br>
>> > + auto Mapping = FileIDMapping.find(File);<br>
>> > + if (Mapping != FileIDMapping.end()) {<br>
>> > + Result = Mapping->second.CovMappingFileID;<br>
>> > + return false;<br>
>> > + }<br>
>> > +<br>
>> > + auto Entry = SM.getFileEntryForID(SpellingFile);<br>
>> > + if (!Entry)<br>
>> > + return true;<br>
>> > +<br>
>> > + Result = FileIDMapping.size();<br>
>> > + FileIDMapping.insert(std::make_pair(File, FileInfo(Result,<br>
>> > Entry)));<br>
>> > + createFileExpansionRegion(LocStart, File);<br>
>> > + return false;<br>
>> > + }<br>
>> > +<br>
>> > + /// \brief Get the coverage mapping file id that corresponds to the<br>
>> > given<br>
>> > + /// clang file id.<br>
>> > + /// Return true if there was an error getting the coverage mapping<br>
>> > file id.<br>
>> > + bool getExistingCoverageFileID(FileID File, unsigned &Result) {<br>
>> > + // Make sure that the file is valid.<br>
>> > + if (File.isInvalid())<br>
>> > + return true;<br>
>> > + auto Mapping = FileIDMapping.find(File);<br>
>> > + if (Mapping != FileIDMapping.end()) {<br>
>> > + Result = Mapping->second.CovMappingFileID;<br>
>> > + return false;<br>
>> > + }<br>
>> > + return true;<br>
>> > + }<br>
>> > +<br>
>> > + /// \brief Return true if the given clang's file id has a<br>
>> > corresponding<br>
>> > + /// coverage file id.<br>
>> > + bool hasExistingCoverageFileID(FileID File) const {<br>
>> > + return FileIDMapping.count(File);<br>
>> > + }<br>
>> > +<br>
>> > + /// \brief Gather all the regions that were skipped by the<br>
>> > preprocessor<br>
>> > + /// using the constructs like #if.<br>
>> > + void gatherSkippedRegions() {<br>
>> > + /// An array of the minimum lineStarts and the maximum lineEnds<br>
>> > + /// for mapping regions from the appropriate source files.<br>
>> > + llvm::SmallVector<std::pair<unsigned, unsigned>, 8> FileLineRanges;<br>
>> > + FileLineRanges.resize(<br>
>> > + FileIDMapping.size(),<br>
>> > + std::make_pair(std::numeric_limits<unsigned>::max(), 0));<br>
>> > + for (const auto &R : MappingRegions) {<br>
>> > + FileLineRanges[R.FileID].first =<br>
>> > + std::min(FileLineRanges[R.FileID].first, R.LineStart);<br>
>> > + FileLineRanges[R.FileID].second =<br>
>> > + std::max(FileLineRanges[R.FileID].second, R.LineEnd);<br>
>> > + }<br>
>> > +<br>
>> > + auto SkippedRanges = CVM.getSourceInfo().getSkippedRanges();<br>
>> > + for (const auto &I : SkippedRanges) {<br>
>> > + auto LocStart = I.getBegin();<br>
>> > + auto LocEnd = I.getEnd();<br>
>> > + auto FileStart = SM.getFileID(LocStart);<br>
>> > + if (!hasExistingCoverageFileID(FileStart))<br>
>> > + continue;<br>
>> > + auto ActualFileStart =<br>
>> > SM.getDecomposedSpellingLoc(LocStart).first;<br>
>> > + if (ActualFileStart != SM.getDecomposedSpellingLoc(LocEnd).first)<br>
>> > + // Ignore regions that span across multiple files.<br>
>> > + continue;<br>
>> > +<br>
>> > + unsigned CovFileID;<br>
>> > + if (getCoverageFileID(LocStart, FileStart, ActualFileStart,<br>
>> > CovFileID))<br>
>> > + continue;<br>
>> > + unsigned LineStart = SM.getSpellingLineNumber(LocStart);<br>
>> > + unsigned ColumnStart = SM.getSpellingColumnNumber(LocStart);<br>
>> > + unsigned LineEnd = SM.getSpellingLineNumber(LocEnd);<br>
>> > + unsigned ColumnEnd = SM.getSpellingColumnNumber(LocEnd);<br>
>> > + CounterMappingRegion Region(Counter(), CovFileID, LineStart,<br>
>> > ColumnStart,<br>
>> > + LineEnd, ColumnEnd, false,<br>
>> > + CounterMappingRegion::SkippedRegion);<br>
>> > + // Make sure that we only collect the regions that are inside<br>
>> > + // the souce code of this function.<br>
>> > + if (Region.LineStart >= FileLineRanges[CovFileID].first &&<br>
>> > + Region.LineEnd <= FileLineRanges[CovFileID].second)<br>
>> > + MappingRegions.push_back(Region);<br>
>> > + }<br>
>> > + }<br>
>> > +<br>
>> > + /// \brief Create a mapping region that correponds to an expansion of<br>
>> > + /// a macro or an embedded include.<br>
>> > + void createFileExpansionRegion(SourceLocation Loc, FileID<br>
>> > ExpandedFile) {<br>
>> > + SourceLocation LocStart;<br>
>> > + if (Loc.isMacroID())<br>
>> > + LocStart = SM.getImmediateExpansionRange(Loc).first;<br>
>> > + else {<br>
>> > + LocStart = SM.getIncludeLoc(ExpandedFile);<br>
>> > + if (LocStart.isInvalid())<br>
>> > + return; // This file has no expansion region.<br>
>> > + }<br>
>> > +<br>
>> > + auto File = SM.getFileID(LocStart);<br>
>> > + auto SpellingFile = SM.getDecomposedSpellingLoc(LocStart).first;<br>
>> > + unsigned CovFileID, ExpandedFileID;<br>
>> > + if (getExistingCoverageFileID(ExpandedFile, ExpandedFileID))<br>
>> > + return;<br>
>> > + if (getCoverageFileID(LocStart, File, SpellingFile, CovFileID))<br>
>> > + return;<br>
>> > + unsigned LineStart = SM.getSpellingLineNumber(LocStart);<br>
>> > + unsigned ColumnStart = SM.getSpellingColumnNumber(LocStart);<br>
>> > + unsigned LineEnd = LineStart;<br>
>> > + // Compute the end column manually as Lexer::getLocForEndOfToken<br>
>> > doesn't<br>
>> > + // give the correct result in all cases.<br>
>> > + unsigned ColumnEnd =<br>
>> > + ColumnStart +<br>
>> > + Lexer::MeasureTokenLength(SM.getSpellingLoc(LocStart), SM,<br>
>> > LangOpts);<br>
>> > +<br>
>> > + MappingRegions.push_back(CounterMappingRegion(<br>
>> > + Counter(), CovFileID, LineStart, ColumnStart, LineEnd,<br>
>> > ColumnEnd,<br>
>> > + false, CounterMappingRegion::ExpansionRegion));<br>
>> > + MappingRegions.back().ExpandedFileID = ExpandedFileID;<br>
>> > + }<br>
>> > +<br>
>> > + /// \brief Enter a source region group that is identified by the<br>
>> > given<br>
>> > + /// statement.<br>
>> > + /// It's not possible to enter a group when there is already<br>
>> > + /// another group present.<br>
>> > + void beginSourceRegionGroup(const Stmt *Group) {<br>
>> > + assert(!CurrentSourceGroup);<br>
>> > + CurrentSourceGroup = Group;<br>
>> > + }<br>
>> > +<br>
>> > + /// \brief Exit the current source region group.<br>
>> > + void endSourceRegionGroup() { CurrentSourceGroup = nullptr; }<br>
>> > +<br>
>> > + /// \brief Brings a region that has the same counter and file to the<br>
>> > back<br>
>> > + /// of the source regions array.<br>
>> > + void bringSimilarRegionBack(Counter Count, FileID File,<br>
>> > + FileID MacroArgumentFile,<br>
>> > + const Stmt *UnreachableInitiator,<br>
>> > + const Stmt *SourceGroup) {<br>
>> > + for (size_t I = SourceRegions.size(); I != 0;) {<br>
>> > + --I;<br>
>> > + if (SourceRegions[I].Count == Count && SourceRegions[I].File ==<br>
>> > File &&<br>
>> > + SourceRegions[I].MacroArgumentFile == MacroArgumentFile &&<br>
>> > + SourceRegions[I].UnreachableInitiator == UnreachableInitiator<br>
>> > &&<br>
>> > + SourceRegions[I].Group == SourceGroup) {<br>
>> > + if (I != SourceRegions.size() - 1)<br>
>> > + std::swap(SourceRegions[I], SourceRegions.back());<br>
>> > + return;<br>
>> > + }<br>
>> > + }<br>
>> > + }<br>
>> > +<br>
>> > + /// \brief Associate a counter with a given source code range.<br>
>> > + void mapSourceCodeRange(SourceLocation LocStart, SourceLocation<br>
>> > LocEnd,<br>
>> > + Counter Count, const Stmt<br>
>> > *UnreachableInitiator,<br>
>> > + const Stmt *SourceGroup, unsigned Flags = 0,<br>
>> > + FileID MacroArgumentFile = FileID()) {<br>
>> > + if (SM.isMacroArgExpansion(LocStart)) {<br>
>> > + // Map the code range with the macro argument's value.<br>
>> > + mapSourceCodeRange(SM.getImmediateSpellingLoc(LocStart),<br>
>> > + SM.getImmediateSpellingLoc(LocEnd), Count,<br>
>> > + UnreachableInitiator, SourceGroup, Flags,<br>
>> > + SM.getFileID(LocStart));<br>
>> > + // Map the code range where the macro argument is referenced.<br>
>> > + SourceLocation<br>
>> > RefLocStart(SM.getImmediateExpansionRange(LocStart).first);<br>
>> > + SourceLocation RefLocEnd(RefLocStart);<br>
>> > + if (SM.isMacroArgExpansion(RefLocStart))<br>
>> > + mapSourceCodeRange(RefLocStart, RefLocEnd, Count,<br>
>> > UnreachableInitiator,<br>
>> > + SourceGroup, 0, SM.getFileID(RefLocStart));<br>
>> > + else<br>
>> > + mapSourceCodeRange(RefLocStart, RefLocEnd, Count,<br>
>> > UnreachableInitiator,<br>
>> > + SourceGroup);<br>
>> > + return;<br>
>> > + }<br>
>> > + auto File = SM.getFileID(LocStart);<br>
>> > + // Make sure that the file id is valid.<br>
>> > + if (File.isInvalid())<br>
>> > + return;<br>
>> > + bringSimilarRegionBack(Count, File, MacroArgumentFile,<br>
>> > UnreachableInitiator,<br>
>> > + SourceGroup);<br>
>> > + SourceMappingRegion R(File, MacroArgumentFile, Count,<br>
>> > UnreachableInitiator,<br>
>> > + SourceGroup, LocStart, LocEnd, Flags);<br>
>> > + if (SourceRegions.empty() || !SourceRegions.back().isMergeable(R))<br>
>> > {<br>
>> > + SourceRegions.push_back(R);<br>
>> > + return;<br>
>> > + }<br>
>> > + SourceRegions.back().mergeByExtendingTo(R);<br>
>> > + }<br>
>> > +<br>
>> > + void mapSourceCodeRange(SourceLocation LocStart, SourceLocation<br>
>> > LocEnd,<br>
>> > + Counter Count, unsigned Flags = 0) {<br>
>> > + mapSourceCodeRange(LocStart, LocEnd, Count,<br>
>> > + CurrentUnreachableRegionInitiator,<br>
>> > CurrentSourceGroup,<br>
>> > + Flags);<br>
>> > + }<br>
>> > +<br>
>> > + void mapSourceCodeRange(const SourceMappingState &State,<br>
>> > + SourceLocation LocStart, SourceLocation<br>
>> > LocEnd,<br>
>> > + unsigned Flags = 0) {<br>
>> > + mapSourceCodeRange(LocStart, LocEnd, State.CurrentRegionCount,<br>
>> > + State.CurrentUnreachableRegionInitiator,<br>
>> > + State.CurrentSourceGroup, Flags);<br>
>> > + }<br>
>> > +<br>
>> > + /// \brief Generate the coverage counter mapping regions from<br>
>> > collected<br>
>> > + /// source regions.<br>
>> > + void emitSourceRegions() {<br>
>> > + for (const auto &R : SourceRegions) {<br>
>> > + SourceLocation LocStart = R.LocStart;<br>
>> > + SourceLocation LocEnd = R.LocEnd;<br>
>> > + if (SM.getFileID(LocEnd) != R.File)<br>
>> > + LocEnd = R.AlternativeLocEnd;<br>
>> > +<br>
>> > + if (R.hasFlag(SourceMappingRegion::IgnoreIfNotExtended) &&<br>
>> > + LocStart == LocEnd)<br>
>> > + continue;<br>
>> > +<br>
>> > + LocEnd = getPreciseTokenLocEnd(LocEnd);<br>
>> > + unsigned LineStart = SM.getSpellingLineNumber(LocStart);<br>
>> > + unsigned ColumnStart = SM.getSpellingColumnNumber(LocStart);<br>
>> > + unsigned LineEnd = SM.getSpellingLineNumber(LocEnd);<br>
>> > + unsigned ColumnEnd = SM.getSpellingColumnNumber(LocEnd);<br>
>> > +<br>
>> > + auto SpellingFile =<br>
>> > SM.getDecomposedSpellingLoc(R.LocStart).first;<br>
>> > + unsigned CovFileID;<br>
>> > + if (getCoverageFileID(R.LocStart, R.File, SpellingFile,<br>
>> > CovFileID))<br>
>> > + continue;<br>
>> > +<br>
>> > + assert(LineStart <= LineEnd);<br>
>> > + MappingRegions.push_back(CounterMappingRegion(<br>
>> > + R.Count, CovFileID, LineStart, ColumnStart, LineEnd,<br>
>> > ColumnEnd,<br>
>> > + false, CounterMappingRegion::CodeRegion));<br>
>> > + }<br>
>> > + }<br>
>> > +};<br>
>> > +<br>
>> > +/// \brief Creates unreachable coverage regions for the functions that<br>
>> > +/// are not emitted.<br>
>> > +struct EmptyCoverageMappingBuilder : public CoverageMappingBuilder {<br>
>> > + EmptyCoverageMappingBuilder(CoverageMappingModuleGen &CVM,<br>
>> > SourceManager &SM,<br>
>> > + const LangOptions &LangOpts)<br>
>> > + : CoverageMappingBuilder(CVM, SM, LangOpts) {}<br>
>> > +<br>
>> > + void VisitDecl(const Decl *D) {<br>
>> > + if (!D->hasBody())<br>
>> > + return;<br>
>> > + auto Body = D->getBody();<br>
>> > + mapSourceCodeRange(Body->getLocStart(), Body->getLocEnd(),<br>
>> > Counter());<br>
>> > + }<br>
>> > +<br>
>> > + /// \brief Write the mapping data to the output stream<br>
>> > + void write(llvm::raw_ostream &OS) {<br>
>> > + emitSourceRegions();<br>
>> > + SmallVector<unsigned, 16> FileIDMapping;<br>
>> > + createFileIDMapping(FileIDMapping);<br>
>> > +<br>
>> > + CoverageMappingWriter Writer(<br>
>> > + FileIDMapping, ArrayRef<CounterExpression>(), MappingRegions);<br>
>> > + Writer.write(OS);<br>
>> > + }<br>
>> > +};<br>
>> > +<br>
>> > +/// \brief A StmtVisitor that creates coverage mapping regions which<br>
>> > map<br>
>> > +/// from the source code locations to the PGO counters.<br>
>> > +struct CounterCoverageMappingBuilder<br>
>> > + : public CoverageMappingBuilder,<br>
>> > + public ConstStmtVisitor<CounterCoverageMappingBuilder> {<br>
>> > + /// \brief The map of statements to count values.<br>
>> > + llvm::DenseMap<const Stmt *, unsigned> &CounterMap;<br>
>> > +<br>
>> > + Counter CurrentRegionCount;<br>
>> > +<br>
>> > + CounterExpressionBuilder Builder;<br>
>> > +<br>
>> > + /// \brief Return a counter that represents the<br>
>> > + /// expression that subracts rhs from lhs.<br>
>> > + Counter subtractCounters(Counter LHS, Counter RHS) {<br>
>> > + return Builder.subtract(LHS, RHS);<br>
>> > + }<br>
>> > +<br>
>> > + /// \brief Return a counter that represents the<br>
>> > + /// the exression that adds lhs and rhs.<br>
>> > + Counter addCounters(Counter LHS, Counter RHS) {<br>
>> > + return Builder.add(LHS, RHS);<br>
>> > + }<br>
>> > +<br>
>> > + /// \brief Return the region counter for the given statement.<br>
>> > + /// This should only be called on statements that have a dedicated<br>
>> > counter.<br>
>> > + unsigned getRegionCounter(const Stmt *S) { return CounterMap[S]; }<br>
>> > +<br>
>> > + /// \brief Return the region count for the counter at the given<br>
>> > index.<br>
>> > + Counter getRegionCount(unsigned CounterId) {<br>
>> > + return Counter::getCounter(CounterId);<br>
>> > + }<br>
>> > +<br>
>> > + /// \brief Return the counter value of the current region.<br>
>> > + Counter getCurrentRegionCount() { return CurrentRegionCount; }<br>
>> > +<br>
>> > + /// \brief Set the counter value for the current region.<br>
>> > + /// This is used to keep track of changes to the most recent counter<br>
>> > + /// from control flow and non-local exits.<br>
>> > + void setCurrentRegionCount(Counter Count) {<br>
>> > + CurrentRegionCount = Count;<br>
>> > + CurrentUnreachableRegionInitiator = nullptr;<br>
>> > + }<br>
>> > +<br>
>> > + /// \brief Indicate that the current region is never reached,<br>
>> > + /// and thus should have a counter value of zero.<br>
>> > + /// This is important so that subsequent regions can correctly track<br>
>> > + /// their parent counts.<br>
>> > + void setCurrentRegionUnreachable(const Stmt *Initiator) {<br>
>> > + CurrentRegionCount = Counter::getZero();<br>
>> > + CurrentUnreachableRegionInitiator = Initiator;<br>
>> > + }<br>
>> > +<br>
>> > + /// \brief A counter for a particular region.<br>
>> > + /// This is the primary interface through<br>
>> > + /// which the coverage mapping builder manages counters and their<br>
>> > values.<br>
>> > + class RegionMapper {<br>
>> > + CounterCoverageMappingBuilder &Mapping;<br>
>> > + Counter Count;<br>
>> > + Counter ParentCount;<br>
>> > + Counter RegionCount;<br>
>> > + Counter Adjust;<br>
>> > +<br>
>> > + public:<br>
>> > + RegionMapper(CounterCoverageMappingBuilder *Mapper, const Stmt *S)<br>
>> > + : Mapping(*Mapper),<br>
>> > + Count(Mapper->getRegionCount(Mapper->getRegionCounter(S))),<br>
>> > + ParentCount(Mapper->getCurrentRegionCount()) {}<br>
>> > +<br>
>> > + /// Get the value of the counter. In most cases this is the number<br>
>> > of times<br>
>> > + /// the region of the counter was entered, but for switch labels<br>
>> > it's the<br>
>> > + /// number of direct jumps to that label.<br>
>> > + Counter getCount() const { return Count; }<br>
>> > +<br>
>> > + /// Get the value of the counter with adjustments applied.<br>
>> > Adjustments occur<br>
>> > + /// when control enters or leaves the region abnormally; i.e., if<br>
>> > there is a<br>
>> > + /// jump to a label within the region, or if the function can<br>
>> > return from<br>
>> > + /// within the region. The adjusted count, then, is the value of<br>
>> > the counter<br>
>> > + /// at the end of the region.<br>
>> > + Counter getAdjustedCount() const {<br>
>> > + return Mapping.addCounters(Count, Adjust);<br>
>> > + }<br>
>> > +<br>
>> > + /// Get the value of the counter in this region's parent, i.e., the<br>
>> > region<br>
>> > + /// that was active when this region began. This is useful for<br>
>> > deriving<br>
>> > + /// counts in implicitly counted regions, like the false case of a<br>
>> > condition<br>
>> > + /// or the normal exits of a loop.<br>
>> > + Counter getParentCount() const { return ParentCount; }<br>
>> > +<br>
>> > + /// Activate the counter by emitting an increment and starting to<br>
>> > track<br>
>> > + /// adjustments. If AddIncomingFallThrough is true, the current<br>
>> > region count<br>
>> > + /// will be added to the counter for the purposes of tracking the<br>
>> > region.<br>
>> > + void beginRegion(bool AddIncomingFallThrough = false) {<br>
>> > + RegionCount = Count;<br>
>> > + if (AddIncomingFallThrough)<br>
>> > + RegionCount =<br>
>> > + Mapping.addCounters(RegionCount,<br>
>> > Mapping.getCurrentRegionCount());<br>
>> > + Mapping.setCurrentRegionCount(RegionCount);<br>
>> > + }<br>
>> > +<br>
>> > + /// For counters on boolean branches, begins tracking adjustments<br>
>> > for the<br>
>> > + /// uncounted path.<br>
>> > + void beginElseRegion() {<br>
>> > + RegionCount = Mapping.subtractCounters(ParentCount, Count);<br>
>> > + Mapping.setCurrentRegionCount(RegionCount);<br>
>> > + }<br>
>> > +<br>
>> > + /// Reset the current region count.<br>
>> > + void setCurrentRegionCount(Counter CurrentCount) {<br>
>> > + RegionCount = CurrentCount;<br>
>> > + Mapping.setCurrentRegionCount(RegionCount);<br>
>> > + }<br>
>> > +<br>
>> > + /// Adjust for non-local control flow after emitting a<br>
>> > subexpression or<br>
>> > + /// substatement. This must be called to account for constructs<br>
>> > such as<br>
>> > + /// gotos,<br>
>> > + /// labels, and returns, so that we can ensure that our region's<br>
>> > count is<br>
>> > + /// correct in the code that follows.<br>
>> > + void adjustForControlFlow() {<br>
>> > + Adjust = Mapping.addCounters(<br>
>> > + Adjust,<br>
>> > Mapping.subtractCounters(Mapping.getCurrentRegionCount(),<br>
>> > + RegionCount));<br>
>> > + // Reset the region count in case this is called again later.<br>
>> > + RegionCount = Mapping.getCurrentRegionCount();<br>
>> > + }<br>
>> > +<br>
>> > + /// Commit all adjustments to the current region. If the region is<br>
>> > a loop,<br>
>> > + /// the LoopAdjust value should be the count of all the breaks and<br>
>> > continues<br>
>> > + /// from the loop, to compensate for those counts being deducted<br>
>> > from the<br>
>> > + /// adjustments for the body of the loop.<br>
>> > + void applyAdjustmentsToRegion() {<br>
>> > + Mapping.setCurrentRegionCount(Mapping.addCounters(ParentCount,<br>
>> > Adjust));<br>
>> > + }<br>
>> > + void applyAdjustmentsToRegion(Counter LoopAdjust) {<br>
>> > + Mapping.setCurrentRegionCount(Mapping.addCounters(<br>
>> > + Mapping.addCounters(ParentCount, Adjust), LoopAdjust));<br>
>> > + }<br>
>> > + };<br>
>> > +<br>
>> > + /// \brief Keep counts of breaks and continues inside loops.<br>
>> > + struct BreakContinue {<br>
>> > + Counter BreakCount;<br>
>> > + Counter ContinueCount;<br>
>> > + };<br>
>> > + SmallVector<BreakContinue, 8> BreakContinueStack;<br>
>> > +<br>
>> > + CounterCoverageMappingBuilder(<br>
>> > + CoverageMappingModuleGen &CVM,<br>
>> > + llvm::DenseMap<const Stmt *, unsigned> &CounterMap,<br>
>> > + unsigned NumRegionCounters, SourceManager &SM,<br>
>> > + const LangOptions &LangOpts)<br>
>> > + : CoverageMappingBuilder(CVM, SM, LangOpts),<br>
>> > CounterMap(CounterMap),<br>
>> > + Builder(NumRegionCounters) {}<br>
>> > +<br>
>> > + /// \brief Write the mapping data to the output stream<br>
>> > + void write(llvm::raw_ostream &OS) {<br>
>> > + emitSourceRegions();<br>
>> > + llvm::SmallVector<unsigned, 8> VirtualFileMapping;<br>
>> > + createFileIDMapping(VirtualFileMapping);<br>
>> > + gatherSkippedRegions();<br>
>> > +<br>
>> > + CoverageMappingWriter Writer(<br>
>> > + VirtualFileMapping, Builder.getExpressions(), MappingRegions);<br>
>> > + Writer.write(OS);<br>
>> > + }<br>
>> > +<br>
>> > + /// \brief Return the current source mapping state.<br>
>> > + SourceMappingState getCurrentState() const {<br>
>> > + return SourceMappingState(CurrentRegionCount, CurrentSourceGroup,<br>
>> > + CurrentUnreachableRegionInitiator);<br>
>> > + }<br>
>> > +<br>
>> > + /// \brief Associate the source code range with the current region<br>
>> > count.<br>
>> > + void mapSourceCodeRange(SourceLocation LocStart, SourceLocation<br>
>> > LocEnd,<br>
>> > + unsigned Flags = 0) {<br>
>> > + CoverageMappingBuilder::mapSourceCodeRange(LocStart, LocEnd,<br>
>> > + CurrentRegionCount,<br>
>> > Flags);<br>
>> > + }<br>
>> > +<br>
>> > + void mapSourceCodeRange(SourceLocation LocStart) {<br>
>> > + CoverageMappingBuilder::mapSourceCodeRange(LocStart, LocStart,<br>
>> > + CurrentRegionCount);<br>
>> > + }<br>
>> > +<br>
>> > + /// \brief Associate the source range of a token with the current<br>
>> > region<br>
>> > + /// count.<br>
>> > + /// Ignore the source range for this token if it produces a distinct<br>
>> > + /// mapping region with no other source ranges.<br>
>> > + void mapToken(SourceLocation LocStart) {<br>
>> > + CoverageMappingBuilder::mapSourceCodeRange(<br>
>> > + LocStart, LocStart, CurrentRegionCount,<br>
>> > + SourceMappingRegion::IgnoreIfNotExtended);<br>
>> > + }<br>
>> > +<br>
>> > + void mapToken(const SourceMappingState &State, SourceLocation<br>
>> > LocStart) {<br>
>> > + CoverageMappingBuilder::mapSourceCodeRange(<br>
>> > + State, LocStart, LocStart,<br>
>> > SourceMappingRegion::IgnoreIfNotExtended);<br>
>> > + }<br>
>> > +<br>
>> > + void VisitStmt(const Stmt *S) {<br>
>> > + mapSourceCodeRange(S->getLocStart());<br>
>> > + for (Stmt::const_child_range I = S->children(); I; ++I) {<br>
>> > + if (*I)<br>
>> > + this->Visit(*I);<br>
>> > + }<br>
>> > + }<br>
>> > +<br>
>> > + /// \brief If the given statement is a compound statement,<br>
>> > + /// map '}' with the same count as '{'.<br>
>> > + void VisitSubStmtRBraceState(const Stmt *S) {<br>
>> > + if (!isa<CompoundStmt>(S))<br>
>> > + return Visit(S);<br>
>> > + const auto *CS = cast<CompoundStmt>(S);<br>
>> > + auto State = getCurrentState();<br>
>> > + mapSourceCodeRange(CS->getLBracLoc());<br>
>> > + for (Stmt::const_child_range I = S->children(); I; ++I) {<br>
>> > + if (*I)<br>
>> > + this->Visit(*I);<br>
>> > + }<br>
>> > + CoverageMappingBuilder::mapSourceCodeRange(State,<br>
>> > CS->getRBracLoc(),<br>
>> > + CS->getRBracLoc());<br>
>> > + }<br>
>> > +<br>
>> > + void VisitDecl(const Decl *D) {<br>
>> > + if (!D->hasBody())<br>
>> > + return;<br>
>> > + // Counter tracks entry to the function body.<br>
>> > + auto Body = D->getBody();<br>
>> > + RegionMapper Cnt(this, Body);<br>
>> > + Cnt.beginRegion();<br>
>> > + VisitSubStmtRBraceState(Body);<br>
>> > + }<br>
>> > +<br>
>> > + void VisitDeclStmt(const DeclStmt *S) {<br>
>> > + mapSourceCodeRange(S->getLocStart());<br>
>> > + for (Stmt::const_child_range I = static_cast<const Stmt<br>
>> > *>(S)->children();<br>
>> > + I; ++I) {<br>
>> > + if (*I)<br>
>> > + this->Visit(*I);<br>
>> > + }<br>
>> > + }<br>
>> > +<br>
>> > + void VisitCompoundStmt(const CompoundStmt *S) {<br>
>> > + mapSourceCodeRange(S->getLBracLoc());<br>
>> > + for (Stmt::const_child_range I = S->children(); I; ++I) {<br>
>> > + if (*I)<br>
>> > + this->Visit(*I);<br>
>> > + }<br>
>> > + mapSourceCodeRange(S->getRBracLoc(), S->getRBracLoc());<br>
>> > + }<br>
>> > +<br>
>> > + void VisitReturnStmt(const ReturnStmt *S) {<br>
>> > + mapSourceCodeRange(S->getLocStart());<br>
>> > + if (S->getRetValue())<br>
>> > + Visit(S->getRetValue());<br>
>> > + setCurrentRegionUnreachable(S);<br>
>> > + }<br>
>> > +<br>
>> > + void VisitGotoStmt(const GotoStmt *S) {<br>
>> > + mapSourceCodeRange(S->getLocStart());<br>
>> > + mapToken(S->getLabelLoc());<br>
>> > + setCurrentRegionUnreachable(S);<br>
>> > + }<br>
>> > +<br>
>> > + void VisitLabelStmt(const LabelStmt *S) {<br>
>> > + // Counter tracks the block following the label.<br>
>> > + RegionMapper Cnt(this, S);<br>
>> > + Cnt.beginRegion();<br>
>> > + mapSourceCodeRange(S->getLocStart());<br>
>> > + // Can't map the ':' token as its location isn't known.<br>
>> > + Visit(S->getSubStmt());<br>
>> > + }<br>
>> > +<br>
>> > + void VisitBreakStmt(const BreakStmt *S) {<br>
>> > + mapSourceCodeRange(S->getLocStart());<br>
>> > + assert(!BreakContinueStack.empty() && "break not in a loop or<br>
>> > switch!");<br>
>> > + BreakContinueStack.back().BreakCount = addCounters(<br>
>> > + BreakContinueStack.back().BreakCount, getCurrentRegionCount());<br>
>> > + setCurrentRegionUnreachable(S);<br>
>> > + }<br>
>> > +<br>
>> > + void VisitContinueStmt(const ContinueStmt *S) {<br>
>> > + mapSourceCodeRange(S->getLocStart());<br>
>> > + assert(!BreakContinueStack.empty() && "continue stmt not in a<br>
>> > loop!");<br>
>> > + BreakContinueStack.back().ContinueCount = addCounters(<br>
>> > + BreakContinueStack.back().ContinueCount,<br>
>> > getCurrentRegionCount());<br>
>> > + setCurrentRegionUnreachable(S);<br>
>> > + }<br>
>> > +<br>
>> > + void VisitWhileStmt(const WhileStmt *S) {<br>
>> > + mapSourceCodeRange(S->getLocStart());<br>
>> > + // Counter tracks the body of the loop.<br>
>> > + RegionMapper Cnt(this, S);<br>
>> > + BreakContinueStack.push_back(BreakContinue());<br>
>> > + // Visit the body region first so the break/continue adjustments<br>
>> > can be<br>
>> > + // included when visiting the condition.<br>
>> > + Cnt.beginRegion();<br>
>> > + VisitSubStmtRBraceState(S->getBody());<br>
>> > + Cnt.adjustForControlFlow();<br>
>> > +<br>
>> > + // ...then go back and propagate counts through the condition. The<br>
>> > count<br>
>> > + // at the start of the condition is the sum of the incoming edges,<br>
>> > + // the backedge from the end of the loop body, and the edges from<br>
>> > + // continue statements.<br>
>> > + BreakContinue BC = BreakContinueStack.pop_back_val();<br>
>> > + Cnt.setCurrentRegionCount(<br>
>> > + addCounters(Cnt.getParentCount(),<br>
>> > + addCounters(Cnt.getAdjustedCount(),<br>
>> > BC.ContinueCount)));<br>
>> > + beginSourceRegionGroup(S->getCond());<br>
>> > + Visit(S->getCond());<br>
>> > + endSourceRegionGroup();<br>
>> > + Cnt.adjustForControlFlow();<br>
>> > + Cnt.applyAdjustmentsToRegion(addCounters(BC.BreakCount,<br>
>> > BC.ContinueCount));<br>
>> > + }<br>
>> > +<br>
>> > + void VisitDoStmt(const DoStmt *S) {<br>
>> > + mapSourceCodeRange(S->getLocStart());<br>
>> > + // Counter tracks the body of the loop.<br>
>> > + RegionMapper Cnt(this, S);<br>
>> > + BreakContinueStack.push_back(BreakContinue());<br>
>> > + Cnt.beginRegion(/*AddIncomingFallThrough=*/true);<br>
>> > + VisitSubStmtRBraceState(S->getBody());<br>
>> > + Cnt.adjustForControlFlow();<br>
>> > +<br>
>> > + BreakContinue BC = BreakContinueStack.pop_back_val();<br>
>> > + // The count at the start of the condition is equal to the count at<br>
>> > the<br>
>> > + // end of the body. The adjusted count does not include either the<br>
>> > + // fall-through count coming into the loop or the continue count,<br>
>> > so add<br>
>> > + // both of those separately. This is coincidentally the same<br>
>> > equation as<br>
>> > + // with while loops but for different reasons.<br>
>> > + Cnt.setCurrentRegionCount(<br>
>> > + addCounters(Cnt.getParentCount(),<br>
>> > + addCounters(Cnt.getAdjustedCount(),<br>
>> > BC.ContinueCount)));<br>
>> > + Visit(S->getCond());<br>
>> > + Cnt.adjustForControlFlow();<br>
>> > + Cnt.applyAdjustmentsToRegion(addCounters(BC.BreakCount,<br>
>> > BC.ContinueCount));<br>
>> > + }<br>
>> > +<br>
>> > + void VisitForStmt(const ForStmt *S) {<br>
>> > + mapSourceCodeRange(S->getLocStart());<br>
>> > + if (S->getInit())<br>
>> > + Visit(S->getInit());<br>
>> > +<br>
>> > + // Counter tracks the body of the loop.<br>
>> > + RegionMapper Cnt(this, S);<br>
>> > + BreakContinueStack.push_back(BreakContinue());<br>
>> > + // Visit the body region first. (This is basically the same as a<br>
>> > while<br>
>> > + // loop; see further comments in VisitWhileStmt.)<br>
>> > + Cnt.beginRegion();<br>
>> > + VisitSubStmtRBraceState(S->getBody());<br>
>> > + Cnt.adjustForControlFlow();<br>
>> > +<br>
>> > + // The increment is essentially part of the body but it needs to<br>
>> > include<br>
>> > + // the count for all the continue statements.<br>
>> > + if (S->getInc()) {<br>
>> > + Cnt.setCurrentRegionCount(addCounters(<br>
>> > + getCurrentRegionCount(),<br>
>> > BreakContinueStack.back().ContinueCount));<br>
>> > + beginSourceRegionGroup(S->getInc());<br>
>> > + Visit(S->getInc());<br>
>> > + endSourceRegionGroup();<br>
>> > + Cnt.adjustForControlFlow();<br>
>> > + }<br>
>> > +<br>
>> > + BreakContinue BC = BreakContinueStack.pop_back_val();<br>
>> > +<br>
>> > + // ...then go back and propagate counts through the condition.<br>
>> > + if (S->getCond()) {<br>
>> > + Cnt.setCurrentRegionCount(<br>
>> > + addCounters(addCounters(Cnt.getParentCount(),<br>
>> > Cnt.getAdjustedCount()),<br>
>> > + BC.ContinueCount));<br>
>> > + beginSourceRegionGroup(S->getCond());<br>
>> > + Visit(S->getCond());<br>
>> > + endSourceRegionGroup();<br>
>> > + Cnt.adjustForControlFlow();<br>
>> > + }<br>
>> > + Cnt.applyAdjustmentsToRegion(addCounters(BC.BreakCount,<br>
>> > BC.ContinueCount));<br>
>> > + }<br>
>> > +<br>
>> > + void VisitCXXForRangeStmt(const CXXForRangeStmt *S) {<br>
>> > + mapSourceCodeRange(S->getLocStart());<br>
>> > + Visit(S->getRangeStmt());<br>
>> > + Visit(S->getBeginEndStmt());<br>
>> > + // Counter tracks the body of the loop.<br>
>> > + RegionMapper Cnt(this, S);<br>
>> > + BreakContinueStack.push_back(BreakContinue());<br>
>> > + // Visit the body region first. (This is basically the same as a<br>
>> > while<br>
>> > + // loop; see further comments in VisitWhileStmt.)<br>
>> > + Cnt.beginRegion();<br>
>> > + VisitSubStmtRBraceState(S->getBody());<br>
>> > + Cnt.adjustForControlFlow();<br>
>> > + BreakContinue BC = BreakContinueStack.pop_back_val();<br>
>> > + Cnt.applyAdjustmentsToRegion(addCounters(BC.BreakCount,<br>
>> > BC.ContinueCount));<br>
>> > + }<br>
>> > +<br>
>> > + void VisitObjCForCollectionStmt(const ObjCForCollectionStmt *S) {<br>
>> > + mapSourceCodeRange(S->getLocStart());<br>
>> > + Visit(S->getElement());<br>
>> > + // Counter tracks the body of the loop.<br>
>> > + RegionMapper Cnt(this, S);<br>
>> > + BreakContinueStack.push_back(BreakContinue());<br>
>> > + VisitSubStmtRBraceState(S->getBody());<br>
>> > + BreakContinue BC = BreakContinueStack.pop_back_val();<br>
>> > + Cnt.adjustForControlFlow();<br>
>> > + Cnt.applyAdjustmentsToRegion(addCounters(BC.BreakCount,<br>
>> > BC.ContinueCount));<br>
>> > + }<br>
>> > +<br>
>> > + void VisitSwitchStmt(const SwitchStmt *S) {<br>
>> > + mapSourceCodeRange(S->getLocStart());<br>
>> > + Visit(S->getCond());<br>
>> > + BreakContinueStack.push_back(BreakContinue());<br>
>> > + // Map the '}' for the body to have the same count as the regions<br>
>> > after<br>
>> > + // the switch.<br>
>> > + SourceLocation RBracLoc;<br>
>> > + if (const auto *CS = dyn_cast<CompoundStmt>(S->getBody())) {<br>
>> > + mapSourceCodeRange(CS->getLBracLoc());<br>
>> > + setCurrentRegionUnreachable(S);<br>
>> > + for (Stmt::const_child_range I = CS->children(); I; ++I) {<br>
>> > + if (*I)<br>
>> > + this->Visit(*I);<br>
>> > + }<br>
>> > + RBracLoc = CS->getRBracLoc();<br>
>> > + } else {<br>
>> > + setCurrentRegionUnreachable(S);<br>
>> > + Visit(S->getBody());<br>
>> > + }<br>
>> > + // If the switch is inside a loop, add the continue counts.<br>
>> > + BreakContinue BC = BreakContinueStack.pop_back_val();<br>
>> > + if (!BreakContinueStack.empty())<br>
>> > + BreakContinueStack.back().ContinueCount = addCounters(<br>
>> > + BreakContinueStack.back().ContinueCount, BC.ContinueCount);<br>
>> > + // Counter tracks the exit block of the switch.<br>
>> > + RegionMapper ExitCnt(this, S);<br>
>> > + ExitCnt.beginRegion();<br>
>> > + if (RBracLoc.isValid())<br>
>> > + mapSourceCodeRange(RBracLoc);<br>
>> > + }<br>
>> > +<br>
>> > + void VisitCaseStmt(const CaseStmt *S) {<br>
>> > + // Counter for this particular case. This counts only jumps from<br>
>> > the<br>
>> > + // switch header and does not include fallthrough from the case<br>
>> > before<br>
>> > + // this one.<br>
>> > + RegionMapper Cnt(this, S);<br>
>> > + Cnt.beginRegion(/*AddIncomingFallThrough=*/true);<br>
>> > + mapSourceCodeRange(S->getLocStart());<br>
>> > + mapToken(S->getColonLoc());<br>
>> > + Visit(S->getSubStmt());<br>
>> > + }<br>
>> > +<br>
>> > + void VisitDefaultStmt(const DefaultStmt *S) {<br>
>> > + // Counter for this default case. This does not include fallthrough<br>
>> > from<br>
>> > + // the previous case.<br>
>> > + RegionMapper Cnt(this, S);<br>
>> > + Cnt.beginRegion(/*AddIncomingFallThrough=*/true);<br>
>> > + mapSourceCodeRange(S->getLocStart());<br>
>> > + mapToken(S->getColonLoc());<br>
>> > + Visit(S->getSubStmt());<br>
>> > + }<br>
>> > +<br>
>> > + void VisitIfStmt(const IfStmt *S) {<br>
>> > + mapSourceCodeRange(S->getLocStart());<br>
>> > + Visit(S->getCond());<br>
>> > + mapToken(S->getElseLoc());<br>
>> > +<br>
>> > + // Counter tracks the "then" part of an if statement. The count for<br>
>> > + // the "else" part, if it exists, will be calculated from this<br>
>> > counter.<br>
>> > + RegionMapper Cnt(this, S);<br>
>> > + Cnt.beginRegion();<br>
>> > + VisitSubStmtRBraceState(S->getThen());<br>
>> > + Cnt.adjustForControlFlow();<br>
>> > +<br>
>> > + if (S->getElse()) {<br>
>> > + Cnt.beginElseRegion();<br>
>> > + VisitSubStmtRBraceState(S->getElse());<br>
>> > + Cnt.adjustForControlFlow();<br>
>> > + }<br>
>> > + Cnt.applyAdjustmentsToRegion();<br>
>> > + }<br>
>> > +<br>
>> > + void VisitCXXTryStmt(const CXXTryStmt *S) {<br>
>> > + mapSourceCodeRange(S->getLocStart());<br>
>> > + Visit(S->getTryBlock());<br>
>> > + for (unsigned I = 0, E = S->getNumHandlers(); I < E; ++I)<br>
>> > + Visit(S->getHandler(I));<br>
>> > + // Counter tracks the continuation block of the try statement.<br>
>> > + RegionMapper Cnt(this, S);<br>
>> > + Cnt.beginRegion();<br>
>> > + }<br>
>> > +<br>
>> > + void VisitCXXCatchStmt(const CXXCatchStmt *S) {<br>
>> > + mapSourceCodeRange(S->getLocStart());<br>
>> > + // Counter tracks the catch statement's handler block.<br>
>> > + RegionMapper Cnt(this, S);<br>
>> > + Cnt.beginRegion();<br>
>> > + VisitSubStmtRBraceState(S->getHandlerBlock());<br>
>> > + }<br>
>> > +<br>
>> > + void VisitAbstractConditionalOperator(const<br>
>> > AbstractConditionalOperator *E) {<br>
>> > + Visit(E->getCond());<br>
>> > + mapToken(E->getQuestionLoc());<br>
>> > + auto State = getCurrentState();<br>
>> > +<br>
>> > + // Counter tracks the "true" part of a conditional operator. The<br>
>> > + // count in the "false" part will be calculated from this counter.<br>
>> > + RegionMapper Cnt(this, E);<br>
>> > + Cnt.beginRegion();<br>
>> > + Visit(E->getTrueExpr());<br>
>> > + Cnt.adjustForControlFlow();<br>
>> > +<br>
>> > + mapToken(State, E->getColonLoc());<br>
>> > +<br>
>> > + Cnt.beginElseRegion();<br>
>> > + Visit(E->getFalseExpr());<br>
>> > + Cnt.adjustForControlFlow();<br>
>> > +<br>
>> > + Cnt.applyAdjustmentsToRegion();<br>
>> > + }<br>
>> > +<br>
>> > + void VisitBinLAnd(const BinaryOperator *E) {<br>
>> > + Visit(E->getLHS());<br>
>> > + mapToken(E->getOperatorLoc());<br>
>> > + // Counter tracks the right hand side of a logical and operator.<br>
>> > + RegionMapper Cnt(this, E);<br>
>> > + Cnt.beginRegion();<br>
>> > + Visit(E->getRHS());<br>
>> > + Cnt.adjustForControlFlow();<br>
>> > + Cnt.applyAdjustmentsToRegion();<br>
>> > + }<br>
>> > +<br>
>> > + void VisitBinLOr(const BinaryOperator *E) {<br>
>> > + Visit(E->getLHS());<br>
>> > + mapToken(E->getOperatorLoc());<br>
>> > + // Counter tracks the right hand side of a logical or operator.<br>
>> > + RegionMapper Cnt(this, E);<br>
>> > + Cnt.beginRegion();<br>
>> > + Visit(E->getRHS());<br>
>> > + Cnt.adjustForControlFlow();<br>
>> > + Cnt.applyAdjustmentsToRegion();<br>
>> > + }<br>
>> > +<br>
>> > + void VisitParenExpr(const ParenExpr *E) {<br>
>> > + mapToken(E->getLParen());<br>
>> > + Visit(E->getSubExpr());<br>
>> > + mapToken(E->getRParen());<br>
>> > + }<br>
>> > +<br>
>> > + void VisitBinaryOperator(const BinaryOperator *E) {<br>
>> > + Visit(E->getLHS());<br>
>> > + mapToken(E->getOperatorLoc());<br>
>> > + Visit(E->getRHS());<br>
>> > + }<br>
>> > +<br>
>> > + void VisitUnaryOperator(const UnaryOperator *E) {<br>
>> > + bool Postfix = E->isPostfix();<br>
>> > + if (!Postfix)<br>
>> > + mapToken(E->getOperatorLoc());<br>
>> > + Visit(E->getSubExpr());<br>
>> > + if (Postfix)<br>
>> > + mapToken(E->getOperatorLoc());<br>
>> > + }<br>
>> > +<br>
>> > + void VisitMemberExpr(const MemberExpr *E) {<br>
>> > + Visit(E->getBase());<br>
>> > + mapToken(E->getMemberLoc());<br>
>> > + }<br>
>> > +<br>
>> > + void VisitCallExpr(const CallExpr *E) {<br>
>> > + Visit(E->getCallee());<br>
>> > + for (const auto &Arg : E->arguments())<br>
>> > + Visit(Arg);<br>
>> > + mapToken(E->getRParenLoc());<br>
>> > + }<br>
>> > +<br>
>> > + void VisitArraySubscriptExpr(const ArraySubscriptExpr *E) {<br>
>> > + Visit(E->getLHS());<br>
>> > + Visit(E->getRHS());<br>
>> > + mapToken(E->getRBracketLoc());<br>
>> > + }<br>
>> > +<br>
>> > + void VisitCStyleCastExpr(const CStyleCastExpr *E) {<br>
>> > + mapToken(E->getLParenLoc());<br>
>> > + mapToken(E->getRParenLoc());<br>
>> > + Visit(E->getSubExpr());<br>
>> > + }<br>
>> > +<br>
>> > + // Map literals as tokens so that the macros like #define PI 3.14<br>
>> > + // won't generate coverage mapping regions.<br>
>> > +<br>
>> > + void VisitIntegerLiteral(const IntegerLiteral *E) {<br>
>> > + mapToken(E->getLocStart());<br>
>> > + }<br>
>> > +<br>
>> > + void VisitFloatingLiteral(const FloatingLiteral *E) {<br>
>> > + mapToken(E->getLocStart());<br>
>> > + }<br>
>> > +<br>
>> > + void VisitCharacterLiteral(const CharacterLiteral *E) {<br>
>> > + mapToken(E->getLocStart());<br>
>> > + }<br>
>> > +<br>
>> > + void VisitStringLiteral(const StringLiteral *E) {<br>
>> > + mapToken(E->getLocStart());<br>
>> > + }<br>
>> > +<br>
>> > + void VisitImaginaryLiteral(const ImaginaryLiteral *E) {<br>
>> > + mapToken(E->getLocStart());<br>
>> > + }<br>
>> > +};<br>
>> > +}<br>
>> > +<br>
>> > +static bool isMachO(const CodeGenModule &CGM) {<br>
>> > + return CGM.getTarget().getTriple().isOSBinFormatMachO();<br>
>> > +}<br>
>> > +<br>
>> > +static StringRef getCoverageSection(const CodeGenModule &CGM) {<br>
>> > + return isMachO(CGM) ? "__DATA,__llvm_covmap" : "__llvm_covmap";<br>
>> > +}<br>
>> > +<br>
>> > +void CoverageMappingModuleGen::addFunctionMappingRecord(<br>
>> > + llvm::GlobalVariable *FunctionName, unsigned FunctionNameSize,<br>
>> > + const std::string &CoverageMapping) {<br>
>> > + llvm::LLVMContext &Ctx = CGM.getLLVMContext();<br>
>> > + auto *Int32Ty = llvm::Type::getInt32Ty(Ctx);<br>
>> > + auto *Int8PtrTy = llvm::Type::getInt8PtrTy(Ctx);<br>
>> > + if (!FunctionRecordTy) {<br>
>> > + llvm::Type *FunctionRecordTypes[] = {Int8PtrTy, Int32Ty, Int32Ty};<br>
>> > + FunctionRecordTy =<br>
>> > + llvm::StructType::get(Ctx, makeArrayRef(FunctionRecordTypes));<br>
>> > + }<br>
>> > +<br>
>> > + llvm::Constant *FunctionRecordVals[] = {<br>
>> > + llvm::ConstantExpr::getBitCast(FunctionName, Int8PtrTy),<br>
>> > + llvm::ConstantInt::get(Int32Ty, FunctionNameSize),<br>
>> > + llvm::ConstantInt::get(Int32Ty, CoverageMapping.size())};<br>
>> > + FunctionRecords.push_back(llvm::ConstantStruct::get(<br>
>> > + FunctionRecordTy, makeArrayRef(FunctionRecordVals)));<br>
>> > + CoverageMappings += CoverageMapping;<br>
>> > +}<br>
>> > +<br>
>> > +void CoverageMappingModuleGen::emit() {<br>
>> > + if (FunctionRecords.empty())<br>
>> > + return;<br>
>> > + llvm::LLVMContext &Ctx = CGM.getLLVMContext();<br>
>> > + auto *Int32Ty = llvm::Type::getInt32Ty(Ctx);<br>
>> > +<br>
>> > + // Create the filenames and merge them with coverage mappings<br>
>> > + llvm::SmallVector<std::string, 16> FilenameStrs;<br>
>> > + llvm::SmallVector<StringRef, 16> FilenameRefs;<br>
>> > + FilenameStrs.resize(FileEntries.size());<br>
>> > + FilenameRefs.resize(FileEntries.size());<br>
>> > + for (const auto &Entry : FileEntries) {<br>
>> > + llvm::SmallString<256> Path(Entry.first->getName());<br>
>> > + llvm::sys::fs::make_absolute(Path);<br>
>> > +<br>
>> > + auto I = Entry.second;<br>
>> > + FilenameStrs[I] = std::move(std::string(Path.begin(), Path.end()));<br>
>> > + FilenameRefs[I] = FilenameStrs[I];<br>
>> > + }<br>
>> > +<br>
>> > + std::string FilenamesAndCoverageMappings;<br>
>> > + llvm::raw_string_ostream OS(FilenamesAndCoverageMappings);<br>
>> > + CoverageFilenamesSectionWriter(FilenameRefs).write(OS);<br>
>> > + OS << CoverageMappings;<br>
>> > + size_t CoverageMappingSize = CoverageMappings.size();<br>
>> > + size_t FilenamesSize = OS.str().size() - CoverageMappingSize;<br>
>> > + // Append extra zeroes if necessary to ensure that the size of the<br>
>> > filenames<br>
>> > + // and coverage mappings is a multiple of 8.<br>
>> > + if (size_t Rem = OS.str().size() % 8) {<br>
>> > + CoverageMappingSize += 8 - Rem;<br>
>> > + for (size_t I = 0, S = 8 - Rem; I < S; ++I)<br>
>> > + OS << '\0';<br>
>> > + }<br>
>> > + auto *FilenamesAndMappingsVal =<br>
>> > + llvm::ConstantDataArray::getString(Ctx, OS.str(), false);<br>
>> > +<br>
>> > + // Create the deferred function records array<br>
>> > + auto RecordsTy =<br>
>> > + llvm::ArrayType::get(FunctionRecordTy, FunctionRecords.size());<br>
>> > + auto RecordsVal = llvm::ConstantArray::get(RecordsTy,<br>
>> > FunctionRecords);<br>
>> > +<br>
>> > + // Create the coverage data record<br>
>> > + llvm::Type *CovDataTypes[] = {Int32Ty, Int32Ty,<br>
>> > + Int32Ty, Int32Ty,<br>
>> > + RecordsTy,<br>
>> > FilenamesAndMappingsVal->getType()};<br>
>> > + auto CovDataTy = llvm::StructType::get(Ctx,<br>
>> > makeArrayRef(CovDataTypes));<br>
>> > + llvm::Constant *TUDataVals[] = {<br>
>> > + llvm::ConstantInt::get(Int32Ty, FunctionRecords.size()),<br>
>> > + llvm::ConstantInt::get(Int32Ty, FilenamesSize),<br>
>> > + llvm::ConstantInt::get(Int32Ty, CoverageMappingSize),<br>
>> > + llvm::ConstantInt::get(Int32Ty,<br>
>> > + /*Version=*/CoverageMappingVersion1),<br>
>> > + RecordsVal, FilenamesAndMappingsVal};<br>
>> > + auto CovDataVal =<br>
>> > + llvm::ConstantStruct::get(CovDataTy, makeArrayRef(TUDataVals));<br>
>> > + auto CovData = new llvm::GlobalVariable(CGM.getModule(), CovDataTy,<br>
>> > true,<br>
>> > +<br>
>> > llvm::GlobalValue::InternalLinkage,<br>
>> > + CovDataVal,<br>
>> > + "__llvm_coverage_mapping");<br>
>> > +<br>
>> > + CovData->setSection(getCoverageSection(CGM));<br>
>> > + CovData->setAlignment(8);<br>
>> > +<br>
>> > + // Make sure the data doesn't get deleted.<br>
>> > + CGM.addUsedGlobal(CovData);<br>
>> > +}<br>
>> > +<br>
>> > +unsigned CoverageMappingModuleGen::getFileID(const FileEntry *File) {<br>
>> > + auto It = FileEntries.find(File);<br>
>> > + if (It != FileEntries.end())<br>
>> > + return It->second;<br>
>> > + unsigned FileID = FileEntries.size();<br>
>> > + FileEntries.insert(std::make_pair(File, FileID));<br>
>> > + return FileID;<br>
>> > +}<br>
>> > +<br>
>> > +void CoverageMappingGen::emitCounterMapping(const Decl *D,<br>
>> > + llvm::raw_ostream &OS) {<br>
>> > + assert(CounterMap);<br>
>> > + CounterCoverageMappingBuilder Walker(CVM, *CounterMap,<br>
>> > NumRegionCounters, SM,<br>
>> > + LangOpts);<br>
>> > + Walker.VisitDecl(D);<br>
>> > + Walker.write(OS);<br>
>> > +}<br>
>> > +<br>
>> > +void CoverageMappingGen::emitEmptyMapping(const Decl *D,<br>
>> > + llvm::raw_ostream &OS) {<br>
>> > + EmptyCoverageMappingBuilder Walker(CVM, SM, LangOpts);<br>
>> > + Walker.VisitDecl(D);<br>
>> > + Walker.write(OS);<br>
>> > +}<br>
>> ><br>
>> > Added: cfe/trunk/lib/CodeGen/CoverageMappingGen.h<br>
>> > URL:<br>
>> > <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CoverageMappingGen.h?rev=214752&view=auto" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CoverageMappingGen.h?rev=214752&view=auto</a><br>
>> ><br>
>> > ==============================================================================<br>
>> > --- cfe/trunk/lib/CodeGen/CoverageMappingGen.h (added)<br>
>> > +++ cfe/trunk/lib/CodeGen/CoverageMappingGen.h Mon Aug 4 13:41:51 2014<br>
>> > @@ -0,0 +1,117 @@<br>
>> > +//===---- CoverageMappingGen.h - Coverage mapping generation ----*- C++<br>
>> > -*-===//<br>
>> > +//<br>
>> > +// The LLVM Compiler Infrastructure<br>
>> > +//<br>
>> > +// This file is distributed under the University of Illinois Open<br>
>> > Source<br>
>> > +// License. See LICENSE.TXT for details.<br>
>> > +//<br>
>> ><br>
>> > +//===----------------------------------------------------------------------===//<br>
>> > +//<br>
>> > +// Instrumentation-based code coverage mapping generator<br>
>> > +//<br>
>> ><br>
>> > +//===----------------------------------------------------------------------===//<br>
>> > +<br>
>> > +#ifndef CLANG_CODEGEN_COVERAGEMAPPINGGEN_H<br>
>> > +#define CLANG_CODEGEN_COVERAGEMAPPINGGEN_H<br>
>> > +<br>
>> > +#include "clang/Basic/LLVM.h"<br>
>> > +#include "clang/Basic/SourceLocation.h"<br>
>> > +#include "clang/Lex/PPCallbacks.h"<br>
>> > +#include "clang/Frontend/CodeGenOptions.h"<br>
>> > +#include "llvm/ADT/StringMap.h"<br>
>> > +#include "llvm/ADT/DenseMap.h"<br>
>> > +#include "llvm/IR/GlobalValue.h"<br>
>> > +#include "llvm/Support/raw_ostream.h"<br>
>> > +<br>
>> > +namespace clang {<br>
>> > +<br>
>> > +class LangOptions;<br>
>> > +class SourceManager;<br>
>> > +class FileEntry;<br>
>> > +class Preprocessor;<br>
>> > +class Decl;<br>
>> > +class Stmt;<br>
>> > +<br>
>> > +/// \brief Stores additional source code information like skipped<br>
>> > ranges which<br>
>> > +/// is required by the coverage mapping generator and is obtained from<br>
</div></div><div><div>>> > +/// the preprocessor.<br>
>> > +class CoverageSourceInfo : public PPCallbacks {<br>
>> > + std::vector<SourceRange> SkippedRanges;<br>
>> > +public:<br>
>> > + ArrayRef<SourceRange> getSkippedRanges() const { return<br>
>> > SkippedRanges; }<br>
>> > +<br>
>> > + void SourceRangeSkipped(SourceRange Range) override;<br>
>> > +};<br>
>> > +<br>
>> > +namespace CodeGen {<br>
>> > +<br>
>> > +class CodeGenModule;<br>
>> > +<br>
>> > +/// \brief Organizes the cross-function state that is used while<br>
>> > generating<br>
>> > +/// code coverage mapping data.<br>
>> > +class CoverageMappingModuleGen {<br>
>> > + CodeGenModule &CGM;<br>
>> > + CoverageSourceInfo &SourceInfo;<br>
>> > + llvm::SmallDenseMap<const FileEntry *, unsigned, 8> FileEntries;<br>
>> > + std::vector<llvm::Constant *> FunctionRecords;<br>
>> > + llvm::StructType *FunctionRecordTy;<br>
>> > + std::string CoverageMappings;<br>
>> > +<br>
>> > +public:<br>
>> > + CoverageMappingModuleGen(CodeGenModule &CGM, CoverageSourceInfo<br>
>> > &SourceInfo)<br>
>> > + : CGM(CGM), SourceInfo(SourceInfo), FunctionRecordTy(nullptr) {}<br>
>> > +<br>
>> > + CoverageSourceInfo &getSourceInfo() const {<br>
>> > + return SourceInfo;<br>
</div></div>>> > + }<br>
>> > +<br>
<div>>> > + /// \brief Add a function's coverage mapping record to the collection<br>
>> > of the<br>
>> > + /// function mapping records.<br>
>> > + void addFunctionMappingRecord(llvm::GlobalVariable *FunctionName,<br>
</div><div>>> > + unsigned FunctionNameSize,<br>
>> > + const std::string &CoverageMapping);<br>
>> > +<br>
</div><div>>> > + /// \brief Emit the coverage mapping data for a translation unit.<br>
>> > + void emit();<br>
</div>>> > +<br>
<div>>> > + /// \brief Return the coverage mapping translation unit file id<br>
>> > + /// for the given file.<br>
>> > + unsigned getFileID(const FileEntry *File);<br>
>> > +};<br>
>> > +<br>
>> > +/// \brief Organizes the per-function state that is used while<br>
>> > generating<br>
>> > +/// code coverage mapping data.<br>
>> > +class CoverageMappingGen {<br>
</div><div>>> > + CoverageMappingModuleGen &CVM;<br>
>> > + SourceManager &SM;<br>
>> > + const LangOptions &LangOpts;<br>
</div><div>>> > + llvm::DenseMap<const Stmt *, unsigned> *CounterMap;<br>
>> > + unsigned NumRegionCounters;<br>
>> > +<br>
>> > +public:<br>
</div>>> > + CoverageMappingGen(CoverageMappingModuleGen &CVM, SourceManager &SM,<br>
>> > + const LangOptions &LangOpts)<br>
<div>>> > + : CVM(CVM), SM(SM), LangOpts(LangOpts), CounterMap(nullptr),<br>
>> > + NumRegionCounters(0) {}<br>
>> > +<br>
</div>>> > + CoverageMappingGen(CoverageMappingModuleGen &CVM, SourceManager &SM,<br>
>> > + const LangOptions &LangOpts,<br>
<div>>> > + llvm::DenseMap<const Stmt *, unsigned><br>
</div><div>>> > *CounterMap,<br>
>> > + unsigned NumRegionCounters)<br>
>> > + : CVM(CVM), SM(SM), LangOpts(LangOpts), CounterMap(CounterMap),<br>
>> > + NumRegionCounters(NumRegionCounters) {}<br>
</div>>> > +<br>
<div>>> > + /// \brief Emit the coverage mapping data which maps the regions of<br>
>> > + /// code to counters that will be used to find the execution<br>
>> > + /// counts for those regions.<br>
>> > + void emitCounterMapping(const Decl *D, llvm::raw_ostream &OS);<br>
</div>>> > +<br>
<div><div>>> > + /// \brief Emit the coverage mapping data for an unused function.<br>
>> > + /// It creates mapping regions with the counter of zero.<br>
>> > + void emitEmptyMapping(const Decl *D, llvm::raw_ostream &OS);<br>
>> > +};<br>
>> > +<br>
>> > +} // end namespace CodeGen<br>
>> > +} // end namespace clang<br>
>> > +<br>
>> > +#endif<br>
>> ><br>
>> > Modified: cfe/trunk/lib/CodeGen/ModuleBuilder.cpp<br>
>> > URL:<br>
>> > <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/ModuleBuilder.cpp?rev=214752&r1=214751&r2=214752&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/ModuleBuilder.cpp?rev=214752&r1=214751&r2=214752&view=diff</a><br>
>> ><br>
>> > ==============================================================================<br>
>> > --- cfe/trunk/lib/CodeGen/ModuleBuilder.cpp (original)<br>
>> > +++ cfe/trunk/lib/CodeGen/ModuleBuilder.cpp Mon Aug 4 13:41:51 2014<br>
>> > @@ -46,14 +46,18 @@ namespace {<br>
>> > }<br>
>> > };<br>
>> ><br>
>> > + CoverageSourceInfo *CoverageInfo;<br>
>> > +<br>
>> > protected:<br>
>> > std::unique_ptr<llvm::Module> M;<br>
>> > std::unique_ptr<CodeGen::CodeGenModule> Builder;<br>
>> ><br>
>> > public:<br>
>> > CodeGeneratorImpl(DiagnosticsEngine &diags, const std::string&<br>
>> > ModuleName,<br>
>> > - const CodeGenOptions &CGO, llvm::LLVMContext& C)<br>
</div></div>>> > + const CodeGenOptions &CGO, llvm::LLVMContext& C,<br>
<div>>> > + CoverageSourceInfo *CoverageInfo = nullptr)<br>
</div><div>>> > : Diags(diags), CodeGenOpts(CGO), HandlingTopLevelDecls(0),<br>
>> > + CoverageInfo(CoverageInfo),<br>
>> > M(new llvm::Module(ModuleName, C)) {}<br>
>> ><br>
>> > virtual ~CodeGeneratorImpl() {}<br>
>> > @@ -86,7 +90,7 @@ namespace {<br>
>> > M->setDataLayout(Ctx->getTargetInfo().getTargetDescription());<br>
>> > TD.reset(new<br>
>> > llvm::DataLayout(Ctx->getTargetInfo().getTargetDescription()));<br>
>> > Builder.reset(new CodeGen::CodeGenModule(Context, CodeGenOpts,<br>
>> > *M, *TD,<br>
>> > - Diags));<br>
>> > + Diags, CoverageInfo));<br>
>> ><br>
>> > for (size_t i = 0, e = CodeGenOpts.DependentLibraries.size(); i <<br>
>> > e; ++i)<br>
>> > HandleDependentLibrary(CodeGenOpts.DependentLibraries[i]);<br>
>> > @@ -136,6 +140,10 @@ namespace {<br>
>> > // void foo() { bar(); }<br>
>> > // } A;<br>
>> > DeferredInlineMethodDefinitions.push_back(D);<br>
>> > +<br>
</div><div>>> > + // Always provide some coverage mapping<br>
</div><div>>> > + // even for the methods that aren't emitted.<br>
>> > + Builder->AddDeferredUnusedCoverageMapping(D);<br>
>> > }<br>
>> ><br>
>> > /// HandleTagDeclDefinition - This callback is invoked each time a<br>
>> > TagDecl<br>
>> > @@ -221,6 +229,7 @@ CodeGenerator *clang::CreateLLVMCodeGen(<br>
</div><div>>> > const std::string& ModuleName,<br>
>> > const CodeGenOptions &CGO,<br>
</div><div>>> > const TargetOptions &/*TO*/,<br>
>> > - llvm::LLVMContext& C) {<br>
</div>>> > - return new CodeGeneratorImpl(Diags, ModuleName, CGO, C);<br>
<div>>> > + llvm::LLVMContext& C,<br>
>> > + CoverageSourceInfo<br>
</div><div><div>>> > *CoverageInfo) {<br>
>> > + return new CodeGeneratorImpl(Diags, ModuleName, CGO, C,<br>
>> > CoverageInfo);<br>
>> > }<br>
>> ><br>
>> > Modified: cfe/trunk/lib/Driver/Tools.cpp<br>
>> > URL:<br>
>> > <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Tools.cpp?rev=214752&r1=214751&r2=214752&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Tools.cpp?rev=214752&r1=214751&r2=214752&view=diff</a><br>
>> ><br>
>> > ==============================================================================<br>
>> > --- cfe/trunk/lib/Driver/Tools.cpp (original)<br>
>> > +++ cfe/trunk/lib/Driver/Tools.cpp Mon Aug 4 13:41:51 2014<br>
>> > @@ -3230,6 +3230,14 @@ void Clang::ConstructJob(Compilation &C,<br>
>> > Args.hasArg(options::OPT_coverage))<br>
>> > CmdArgs.push_back("-femit-coverage-data");<br>
>> ><br>
>> > + if (Args.hasArg(options::OPT_fcoverage_mapping) &&<br>
>> > + !Args.hasArg(options::OPT_fprofile_instr_generate))<br>
>> > + D.Diag(diag::err_drv_argument_only_allowed_with)<br>
>> > + << "-fcoverage-mapping" << "-fprofile-instr-generate";<br>
>> > +<br>
>> > + if (Args.hasArg(options::OPT_fcoverage_mapping))<br>
>> > + CmdArgs.push_back("-fcoverage-mapping");<br>
>> > +<br>
>> > if (C.getArgs().hasArg(options::OPT_c) ||<br>
>> > C.getArgs().hasArg(options::OPT_S)) {<br>
>> > if (Output.isFilename()) {<br>
>> ><br>
>> > Modified: cfe/trunk/lib/Frontend/CompilerInvocation.cpp<br>
>> > URL:<br>
>> > <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/CompilerInvocation.cpp?rev=214752&r1=214751&r2=214752&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/CompilerInvocation.cpp?rev=214752&r1=214751&r2=214752&view=diff</a><br>
>> ><br>
>> > ==============================================================================<br>
>> > --- cfe/trunk/lib/Frontend/CompilerInvocation.cpp (original)<br>
</div></div>>> > +++ cfe/trunk/lib/Frontend/CompilerInvocation.cpp Mon Aug 4 13:41:51<br>
>> > 2014<br>
<div><div>>> > @@ -403,6 +403,7 @@ static bool ParseCodeGenArgs(CodeGenOpti<br>
>> > Opts.SampleProfileFile =<br>
>> > Args.getLastArgValue(OPT_fprofile_sample_use_EQ);<br>
>> > Opts.ProfileInstrGenerate = Args.hasArg(OPT_fprofile_instr_generate);<br>
>> > Opts.InstrProfileInput =<br>
>> > Args.getLastArgValue(OPT_fprofile_instr_use_EQ);<br>
>> > + Opts.CoverageMapping = Args.hasArg(OPT_fcoverage_mapping);<br>
>> > Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);<br>
>> > Opts.ObjCAutoRefCountExceptions =<br>
>> > Args.hasArg(OPT_fobjc_arc_exceptions);<br>
>> > Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);<br>
>> ><br>
>> ><br>
>> > _______________________________________________<br>
>> > cfe-commits mailing list<br>
>> > <a href="mailto:cfe-commits@cs.uiuc.edu" target="_blank">cfe-commits@cs.uiuc.edu</a><br>
>> > <a href="http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits" target="_blank">http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits</a><br>
><br>
><br>
</div></div></blockquote></div><br></div>
</blockquote></div><br></div></div>