| //===----- CGOpenMPRuntime.cpp - Interface to OpenMP Runtimes -------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This provides a class for OpenMP runtime code generation. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "CGOpenMPRuntime.h" |
| #include "CodeGenFunction.h" |
| #include "clang/AST/StmtOpenMP.h" |
| #include "clang/AST/Decl.h" |
| #include "llvm/ADT/ArrayRef.h" |
| #include "llvm/IR/CallSite.h" |
| #include "llvm/IR/DerivedTypes.h" |
| #include "llvm/IR/GlobalValue.h" |
| #include "llvm/IR/Value.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include <cassert> |
| |
| using namespace clang; |
| using namespace CodeGen; |
| |
| namespace { |
| /// \brief API for captured statement code generation in OpenMP constructs. |
| class CGOpenMPRegionInfo : public CodeGenFunction::CGCapturedStmtInfo { |
| public: |
| CGOpenMPRegionInfo(const OMPExecutableDirective &D, const CapturedStmt &CS, |
| const VarDecl *ThreadIDVar) |
| : CGCapturedStmtInfo(CS, CR_OpenMP), ThreadIDVar(ThreadIDVar), |
| Directive(D) { |
| assert(ThreadIDVar != nullptr && "No ThreadID in OpenMP region."); |
| } |
| |
| /// \brief Gets a variable or parameter for storing global thread id |
| /// inside OpenMP construct. |
| const VarDecl *getThreadIDVariable() const { return ThreadIDVar; } |
| |
| /// \brief Gets an LValue for the current ThreadID variable. |
| LValue getThreadIDVariableLValue(CodeGenFunction &CGF); |
| |
| static bool classof(const CGCapturedStmtInfo *Info) { |
| return Info->getKind() == CR_OpenMP; |
| } |
| |
| /// \brief Emit the captured statement body. |
| void EmitBody(CodeGenFunction &CGF, Stmt *S) override; |
| |
| /// \brief Get the name of the capture helper. |
| StringRef getHelperName() const override { return ".omp_outlined."; } |
| |
| private: |
| /// \brief A variable or parameter storing global thread id for OpenMP |
| /// constructs. |
| const VarDecl *ThreadIDVar; |
| /// \brief OpenMP executable directive associated with the region. |
| const OMPExecutableDirective &Directive; |
| }; |
| } // namespace |
| |
| LValue CGOpenMPRegionInfo::getThreadIDVariableLValue(CodeGenFunction &CGF) { |
| return CGF.MakeNaturalAlignAddrLValue( |
| CGF.GetAddrOfLocalVar(ThreadIDVar), |
| CGF.getContext().getPointerType(ThreadIDVar->getType())); |
| } |
| |
| void CGOpenMPRegionInfo::EmitBody(CodeGenFunction &CGF, Stmt *S) { |
| CodeGenFunction::OMPPrivateScope PrivateScope(CGF); |
| CGF.EmitOMPPrivateClause(Directive, PrivateScope); |
| CGF.EmitOMPFirstprivateClause(Directive, PrivateScope); |
| if (PrivateScope.Privatize()) { |
| // Emit implicit barrier to synchronize threads and avoid data races. |
| auto Flags = static_cast<CGOpenMPRuntime::OpenMPLocationFlags>( |
| CGOpenMPRuntime::OMP_IDENT_KMPC | |
| CGOpenMPRuntime::OMP_IDENT_BARRIER_IMPL); |
| CGF.CGM.getOpenMPRuntime().EmitOMPBarrierCall(CGF, Directive.getLocStart(), |
| Flags); |
| } |
| CGCapturedStmtInfo::EmitBody(CGF, S); |
| } |
| |
| CGOpenMPRuntime::CGOpenMPRuntime(CodeGenModule &CGM) |
| : CGM(CGM), DefaultOpenMPPSource(nullptr) { |
| IdentTy = llvm::StructType::create( |
| "ident_t", CGM.Int32Ty /* reserved_1 */, CGM.Int32Ty /* flags */, |
| CGM.Int32Ty /* reserved_2 */, CGM.Int32Ty /* reserved_3 */, |
| CGM.Int8PtrTy /* psource */, nullptr); |
| // Build void (*kmpc_micro)(kmp_int32 *global_tid, kmp_int32 *bound_tid,...) |
| llvm::Type *MicroParams[] = {llvm::PointerType::getUnqual(CGM.Int32Ty), |
| llvm::PointerType::getUnqual(CGM.Int32Ty)}; |
| Kmpc_MicroTy = llvm::FunctionType::get(CGM.VoidTy, MicroParams, true); |
| KmpCriticalNameTy = llvm::ArrayType::get(CGM.Int32Ty, /*NumElements*/ 8); |
| } |
| |
| llvm::Value * |
| CGOpenMPRuntime::EmitOpenMPOutlinedFunction(const OMPExecutableDirective &D, |
| const VarDecl *ThreadIDVar) { |
| const CapturedStmt *CS = cast<CapturedStmt>(D.getAssociatedStmt()); |
| CodeGenFunction CGF(CGM, true); |
| CGOpenMPRegionInfo CGInfo(D, *CS, ThreadIDVar); |
| CGF.CapturedStmtInfo = &CGInfo; |
| return CGF.GenerateCapturedStmtFunction(*CS); |
| } |
| |
| llvm::Value * |
| CGOpenMPRuntime::GetOrCreateDefaultOpenMPLocation(OpenMPLocationFlags Flags) { |
| llvm::Value *Entry = OpenMPDefaultLocMap.lookup(Flags); |
| if (!Entry) { |
| if (!DefaultOpenMPPSource) { |
| // Initialize default location for psource field of ident_t structure of |
| // all ident_t objects. Format is ";file;function;line;column;;". |
| // Taken from |
| // http://llvm.org/svn/llvm-project/openmp/trunk/runtime/src/kmp_str.c |
| DefaultOpenMPPSource = |
| CGM.GetAddrOfConstantCString(";unknown;unknown;0;0;;"); |
| DefaultOpenMPPSource = |
| llvm::ConstantExpr::getBitCast(DefaultOpenMPPSource, CGM.Int8PtrTy); |
| } |
| auto DefaultOpenMPLocation = new llvm::GlobalVariable( |
| CGM.getModule(), IdentTy, /*isConstant*/ true, |
| llvm::GlobalValue::PrivateLinkage, /*Initializer*/ nullptr); |
| DefaultOpenMPLocation->setUnnamedAddr(true); |
| |
| llvm::Constant *Zero = llvm::ConstantInt::get(CGM.Int32Ty, 0, true); |
| llvm::Constant *Values[] = {Zero, |
| llvm::ConstantInt::get(CGM.Int32Ty, Flags), |
| Zero, Zero, DefaultOpenMPPSource}; |
| llvm::Constant *Init = llvm::ConstantStruct::get(IdentTy, Values); |
| DefaultOpenMPLocation->setInitializer(Init); |
| OpenMPDefaultLocMap[Flags] = DefaultOpenMPLocation; |
| return DefaultOpenMPLocation; |
| } |
| return Entry; |
| } |
| |
| llvm::Value *CGOpenMPRuntime::EmitOpenMPUpdateLocation( |
| CodeGenFunction &CGF, SourceLocation Loc, OpenMPLocationFlags Flags) { |
| // If no debug info is generated - return global default location. |
| if (CGM.getCodeGenOpts().getDebugInfo() == CodeGenOptions::NoDebugInfo || |
| Loc.isInvalid()) |
| return GetOrCreateDefaultOpenMPLocation(Flags); |
| |
| assert(CGF.CurFn && "No function in current CodeGenFunction."); |
| |
| llvm::Value *LocValue = nullptr; |
| OpenMPLocThreadIDMapTy::iterator I = OpenMPLocThreadIDMap.find(CGF.CurFn); |
| if (I != OpenMPLocThreadIDMap.end()) { |
| LocValue = I->second.DebugLoc; |
| } else { |
| // Generate "ident_t .kmpc_loc.addr;" |
| llvm::AllocaInst *AI = CGF.CreateTempAlloca(IdentTy, ".kmpc_loc.addr"); |
| AI->setAlignment(CGM.getDataLayout().getPrefTypeAlignment(IdentTy)); |
| auto &Elem = OpenMPLocThreadIDMap.FindAndConstruct(CGF.CurFn); |
| Elem.second.DebugLoc = AI; |
| LocValue = AI; |
| |
| CGBuilderTy::InsertPointGuard IPG(CGF.Builder); |
| CGF.Builder.SetInsertPoint(CGF.AllocaInsertPt); |
| CGF.Builder.CreateMemCpy(LocValue, GetOrCreateDefaultOpenMPLocation(Flags), |
| llvm::ConstantExpr::getSizeOf(IdentTy), |
| CGM.PointerAlignInBytes); |
| } |
| |
| // char **psource = &.kmpc_loc_<flags>.addr.psource; |
| llvm::Value *PSource = |
| CGF.Builder.CreateConstInBoundsGEP2_32(LocValue, 0, IdentField_PSource); |
| |
| auto OMPDebugLoc = OpenMPDebugLocMap.lookup(Loc.getRawEncoding()); |
| if (OMPDebugLoc == nullptr) { |
| SmallString<128> Buffer2; |
| llvm::raw_svector_ostream OS2(Buffer2); |
| // Build debug location |
| PresumedLoc PLoc = CGF.getContext().getSourceManager().getPresumedLoc(Loc); |
| OS2 << ";" << PLoc.getFilename() << ";"; |
| if (const FunctionDecl *FD = |
| dyn_cast_or_null<FunctionDecl>(CGF.CurFuncDecl)) { |
| OS2 << FD->getQualifiedNameAsString(); |
| } |
| OS2 << ";" << PLoc.getLine() << ";" << PLoc.getColumn() << ";;"; |
| OMPDebugLoc = CGF.Builder.CreateGlobalStringPtr(OS2.str()); |
| OpenMPDebugLocMap[Loc.getRawEncoding()] = OMPDebugLoc; |
| } |
| // *psource = ";<File>;<Function>;<Line>;<Column>;;"; |
| CGF.Builder.CreateStore(OMPDebugLoc, PSource); |
| |
| return LocValue; |
| } |
| |
| llvm::Value *CGOpenMPRuntime::GetOpenMPThreadID(CodeGenFunction &CGF, |
| SourceLocation Loc) { |
| assert(CGF.CurFn && "No function in current CodeGenFunction."); |
| |
| llvm::Value *ThreadID = nullptr; |
| // Check whether we've already cached a load of the thread id in this |
| // function. |
| OpenMPLocThreadIDMapTy::iterator I = OpenMPLocThreadIDMap.find(CGF.CurFn); |
| if (I != OpenMPLocThreadIDMap.end()) { |
| ThreadID = I->second.ThreadID; |
| if (ThreadID != nullptr) |
| return ThreadID; |
| } |
| if (auto OMPRegionInfo = |
| dyn_cast_or_null<CGOpenMPRegionInfo>(CGF.CapturedStmtInfo)) { |
| // Check if this an outlined function with thread id passed as argument. |
| auto ThreadIDVar = OMPRegionInfo->getThreadIDVariable(); |
| auto LVal = OMPRegionInfo->getThreadIDVariableLValue(CGF); |
| auto RVal = CGF.EmitLoadOfLValue(LVal, Loc); |
| LVal = CGF.MakeNaturalAlignAddrLValue(RVal.getScalarVal(), |
| ThreadIDVar->getType()); |
| ThreadID = CGF.EmitLoadOfLValue(LVal, Loc).getScalarVal(); |
| // If value loaded in entry block, cache it and use it everywhere in |
| // function. |
| if (CGF.Builder.GetInsertBlock() == CGF.AllocaInsertPt->getParent()) { |
| auto &Elem = OpenMPLocThreadIDMap.FindAndConstruct(CGF.CurFn); |
| Elem.second.ThreadID = ThreadID; |
| } |
| } else { |
| // This is not an outlined function region - need to call __kmpc_int32 |
| // kmpc_global_thread_num(ident_t *loc). |
| // Generate thread id value and cache this value for use across the |
| // function. |
| CGBuilderTy::InsertPointGuard IPG(CGF.Builder); |
| CGF.Builder.SetInsertPoint(CGF.AllocaInsertPt); |
| llvm::Value *Args[] = {EmitOpenMPUpdateLocation(CGF, Loc)}; |
| ThreadID = CGF.EmitRuntimeCall( |
| CreateRuntimeFunction(OMPRTL__kmpc_global_thread_num), Args); |
| auto &Elem = OpenMPLocThreadIDMap.FindAndConstruct(CGF.CurFn); |
| Elem.second.ThreadID = ThreadID; |
| } |
| return ThreadID; |
| } |
| |
| void CGOpenMPRuntime::FunctionFinished(CodeGenFunction &CGF) { |
| assert(CGF.CurFn && "No function in current CodeGenFunction."); |
| if (OpenMPLocThreadIDMap.count(CGF.CurFn)) |
| OpenMPLocThreadIDMap.erase(CGF.CurFn); |
| } |
| |
| llvm::Type *CGOpenMPRuntime::getIdentTyPointerTy() { |
| return llvm::PointerType::getUnqual(IdentTy); |
| } |
| |
| llvm::Type *CGOpenMPRuntime::getKmpc_MicroPointerTy() { |
| return llvm::PointerType::getUnqual(Kmpc_MicroTy); |
| } |
| |
| llvm::Constant * |
| CGOpenMPRuntime::CreateRuntimeFunction(OpenMPRTLFunction Function) { |
| llvm::Constant *RTLFn = nullptr; |
| switch (Function) { |
| case OMPRTL__kmpc_fork_call: { |
| // Build void __kmpc_fork_call(ident_t *loc, kmp_int32 argc, kmpc_micro |
| // microtask, ...); |
| llvm::Type *TypeParams[] = {getIdentTyPointerTy(), CGM.Int32Ty, |
| getKmpc_MicroPointerTy()}; |
| llvm::FunctionType *FnTy = |
| llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ true); |
| RTLFn = CGM.CreateRuntimeFunction(FnTy, "__kmpc_fork_call"); |
| break; |
| } |
| case OMPRTL__kmpc_global_thread_num: { |
| // Build kmp_int32 __kmpc_global_thread_num(ident_t *loc); |
| llvm::Type *TypeParams[] = {getIdentTyPointerTy()}; |
| llvm::FunctionType *FnTy = |
| llvm::FunctionType::get(CGM.Int32Ty, TypeParams, /*isVarArg*/ false); |
| RTLFn = CGM.CreateRuntimeFunction(FnTy, "__kmpc_global_thread_num"); |
| break; |
| } |
| case OMPRTL__kmpc_threadprivate_cached: { |
| // Build void *__kmpc_threadprivate_cached(ident_t *loc, |
| // kmp_int32 global_tid, void *data, size_t size, void ***cache); |
| llvm::Type *TypeParams[] = {getIdentTyPointerTy(), CGM.Int32Ty, |
| CGM.VoidPtrTy, CGM.SizeTy, |
| CGM.VoidPtrTy->getPointerTo()->getPointerTo()}; |
| llvm::FunctionType *FnTy = |
| llvm::FunctionType::get(CGM.VoidPtrTy, TypeParams, /*isVarArg*/ false); |
| RTLFn = CGM.CreateRuntimeFunction(FnTy, "__kmpc_threadprivate_cached"); |
| break; |
| } |
| case OMPRTL__kmpc_critical: { |
| // Build void __kmpc_critical(ident_t *loc, kmp_int32 global_tid, |
| // kmp_critical_name *crit); |
| llvm::Type *TypeParams[] = { |
| getIdentTyPointerTy(), CGM.Int32Ty, |
| llvm::PointerType::getUnqual(KmpCriticalNameTy)}; |
| llvm::FunctionType *FnTy = |
| llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ false); |
| RTLFn = CGM.CreateRuntimeFunction(FnTy, "__kmpc_critical"); |
| break; |
| } |
| case OMPRTL__kmpc_threadprivate_register: { |
| // Build void __kmpc_threadprivate_register(ident_t *, void *data, |
| // kmpc_ctor ctor, kmpc_cctor cctor, kmpc_dtor dtor); |
| // typedef void *(*kmpc_ctor)(void *); |
| auto KmpcCtorTy = |
| llvm::FunctionType::get(CGM.VoidPtrTy, CGM.VoidPtrTy, |
| /*isVarArg*/ false)->getPointerTo(); |
| // typedef void *(*kmpc_cctor)(void *, void *); |
| llvm::Type *KmpcCopyCtorTyArgs[] = {CGM.VoidPtrTy, CGM.VoidPtrTy}; |
| auto KmpcCopyCtorTy = |
| llvm::FunctionType::get(CGM.VoidPtrTy, KmpcCopyCtorTyArgs, |
| /*isVarArg*/ false)->getPointerTo(); |
| // typedef void (*kmpc_dtor)(void *); |
| auto KmpcDtorTy = |
| llvm::FunctionType::get(CGM.VoidTy, CGM.VoidPtrTy, /*isVarArg*/ false) |
| ->getPointerTo(); |
| llvm::Type *FnTyArgs[] = {getIdentTyPointerTy(), CGM.VoidPtrTy, KmpcCtorTy, |
| KmpcCopyCtorTy, KmpcDtorTy}; |
| auto FnTy = llvm::FunctionType::get(CGM.VoidTy, FnTyArgs, |
| /*isVarArg*/ false); |
| RTLFn = CGM.CreateRuntimeFunction(FnTy, "__kmpc_threadprivate_register"); |
| break; |
| } |
| case OMPRTL__kmpc_end_critical: { |
| // Build void __kmpc_end_critical(ident_t *loc, kmp_int32 global_tid, |
| // kmp_critical_name *crit); |
| llvm::Type *TypeParams[] = { |
| getIdentTyPointerTy(), CGM.Int32Ty, |
| llvm::PointerType::getUnqual(KmpCriticalNameTy)}; |
| llvm::FunctionType *FnTy = |
| llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ false); |
| RTLFn = CGM.CreateRuntimeFunction(FnTy, "__kmpc_end_critical"); |
| break; |
| } |
| case OMPRTL__kmpc_barrier: { |
| // Build void __kmpc_barrier(ident_t *loc, kmp_int32 global_tid); |
| llvm::Type *TypeParams[] = {getIdentTyPointerTy(), CGM.Int32Ty}; |
| llvm::FunctionType *FnTy = |
| llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ false); |
| RTLFn = CGM.CreateRuntimeFunction(FnTy, /*Name*/ "__kmpc_barrier"); |
| break; |
| } |
| case OMPRTL__kmpc_push_num_threads: { |
| // Build void __kmpc_push_num_threads(ident_t *loc, kmp_int32 global_tid, |
| // kmp_int32 num_threads) |
| llvm::Type *TypeParams[] = {getIdentTyPointerTy(), CGM.Int32Ty, |
| CGM.Int32Ty}; |
| llvm::FunctionType *FnTy = |
| llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ false); |
| RTLFn = CGM.CreateRuntimeFunction(FnTy, "__kmpc_push_num_threads"); |
| break; |
| } |
| case OMPRTL__kmpc_serialized_parallel: { |
| // Build void __kmpc_serialized_parallel(ident_t *loc, kmp_int32 |
| // global_tid); |
| llvm::Type *TypeParams[] = {getIdentTyPointerTy(), CGM.Int32Ty}; |
| llvm::FunctionType *FnTy = |
| llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ false); |
| RTLFn = CGM.CreateRuntimeFunction(FnTy, "__kmpc_serialized_parallel"); |
| break; |
| } |
| case OMPRTL__kmpc_end_serialized_parallel: { |
| // Build void __kmpc_end_serialized_parallel(ident_t *loc, kmp_int32 |
| // global_tid); |
| llvm::Type *TypeParams[] = {getIdentTyPointerTy(), CGM.Int32Ty}; |
| llvm::FunctionType *FnTy = |
| llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ false); |
| RTLFn = CGM.CreateRuntimeFunction(FnTy, "__kmpc_end_serialized_parallel"); |
| break; |
| } |
| case OMPRTL__kmpc_flush: { |
| // Build void __kmpc_flush(ident_t *loc, ...); |
| llvm::Type *TypeParams[] = {getIdentTyPointerTy()}; |
| llvm::FunctionType *FnTy = |
| llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ true); |
| RTLFn = CGM.CreateRuntimeFunction(FnTy, "__kmpc_flush"); |
| break; |
| } |
| } |
| return RTLFn; |
| } |
| |
| llvm::Constant * |
| CGOpenMPRuntime::getOrCreateThreadPrivateCache(const VarDecl *VD) { |
| // Lookup the entry, lazily creating it if necessary. |
| return GetOrCreateInternalVariable(CGM.Int8PtrPtrTy, |
| Twine(CGM.getMangledName(VD)) + ".cache."); |
| } |
| |
| llvm::Value *CGOpenMPRuntime::getOMPAddrOfThreadPrivate(CodeGenFunction &CGF, |
| const VarDecl *VD, |
| llvm::Value *VDAddr, |
| SourceLocation Loc) { |
| auto VarTy = VDAddr->getType()->getPointerElementType(); |
| llvm::Value *Args[] = {EmitOpenMPUpdateLocation(CGF, Loc), |
| GetOpenMPThreadID(CGF, Loc), |
| CGF.Builder.CreatePointerCast(VDAddr, CGM.Int8PtrTy), |
| CGM.getSize(CGM.GetTargetTypeStoreSize(VarTy)), |
| getOrCreateThreadPrivateCache(VD)}; |
| return CGF.EmitRuntimeCall( |
| CreateRuntimeFunction(OMPRTL__kmpc_threadprivate_cached), Args); |
| } |
| |
| void CGOpenMPRuntime::EmitOMPThreadPrivateVarInit( |
| CodeGenFunction &CGF, llvm::Value *VDAddr, llvm::Value *Ctor, |
| llvm::Value *CopyCtor, llvm::Value *Dtor, SourceLocation Loc) { |
| // Call kmp_int32 __kmpc_global_thread_num(&loc) to init OpenMP runtime |
| // library. |
| auto OMPLoc = EmitOpenMPUpdateLocation(CGF, Loc); |
| CGF.EmitRuntimeCall(CreateRuntimeFunction(OMPRTL__kmpc_global_thread_num), |
| OMPLoc); |
| // Call __kmpc_threadprivate_register(&loc, &var, ctor, cctor/*NULL*/, dtor) |
| // to register constructor/destructor for variable. |
| llvm::Value *Args[] = {OMPLoc, |
| CGF.Builder.CreatePointerCast(VDAddr, CGM.VoidPtrTy), |
| Ctor, CopyCtor, Dtor}; |
| CGF.EmitRuntimeCall(CreateRuntimeFunction( |
| CGOpenMPRuntime::OMPRTL__kmpc_threadprivate_register), |
| Args); |
| } |
| |
| llvm::Function *CGOpenMPRuntime::EmitOMPThreadPrivateVarDefinition( |
| const VarDecl *VD, llvm::Value *VDAddr, SourceLocation Loc, |
| bool PerformInit, CodeGenFunction *CGF) { |
| VD = VD->getDefinition(CGM.getContext()); |
| if (VD && ThreadPrivateWithDefinition.count(VD) == 0) { |
| ThreadPrivateWithDefinition.insert(VD); |
| QualType ASTTy = VD->getType(); |
| |
| llvm::Value *Ctor = nullptr, *CopyCtor = nullptr, *Dtor = nullptr; |
| auto Init = VD->getAnyInitializer(); |
| if (CGM.getLangOpts().CPlusPlus && PerformInit) { |
| // Generate function that re-emits the declaration's initializer into the |
| // threadprivate copy of the variable VD |
| CodeGenFunction CtorCGF(CGM); |
| FunctionArgList Args; |
| ImplicitParamDecl Dst(CGM.getContext(), /*DC=*/nullptr, SourceLocation(), |
| /*Id=*/nullptr, CGM.getContext().VoidPtrTy); |
| Args.push_back(&Dst); |
| |
| auto &FI = CGM.getTypes().arrangeFreeFunctionDeclaration( |
| CGM.getContext().VoidPtrTy, Args, FunctionType::ExtInfo(), |
| /*isVariadic=*/false); |
| auto FTy = CGM.getTypes().GetFunctionType(FI); |
| auto Fn = CGM.CreateGlobalInitOrDestructFunction( |
| FTy, ".__kmpc_global_ctor_.", Loc); |
| CtorCGF.StartFunction(GlobalDecl(), CGM.getContext().VoidPtrTy, Fn, FI, |
| Args, SourceLocation()); |
| auto ArgVal = CtorCGF.EmitLoadOfScalar( |
| CtorCGF.GetAddrOfLocalVar(&Dst), |
| /*Volatile=*/false, CGM.PointerAlignInBytes, |
| CGM.getContext().VoidPtrTy, Dst.getLocation()); |
| auto Arg = CtorCGF.Builder.CreatePointerCast( |
| ArgVal, |
| CtorCGF.ConvertTypeForMem(CGM.getContext().getPointerType(ASTTy))); |
| CtorCGF.EmitAnyExprToMem(Init, Arg, Init->getType().getQualifiers(), |
| /*IsInitializer=*/true); |
| ArgVal = CtorCGF.EmitLoadOfScalar( |
| CtorCGF.GetAddrOfLocalVar(&Dst), |
| /*Volatile=*/false, CGM.PointerAlignInBytes, |
| CGM.getContext().VoidPtrTy, Dst.getLocation()); |
| CtorCGF.Builder.CreateStore(ArgVal, CtorCGF.ReturnValue); |
| CtorCGF.FinishFunction(); |
| Ctor = Fn; |
| } |
| if (VD->getType().isDestructedType() != QualType::DK_none) { |
| // Generate function that emits destructor call for the threadprivate copy |
| // of the variable VD |
| CodeGenFunction DtorCGF(CGM); |
| FunctionArgList Args; |
| ImplicitParamDecl Dst(CGM.getContext(), /*DC=*/nullptr, SourceLocation(), |
| /*Id=*/nullptr, CGM.getContext().VoidPtrTy); |
| Args.push_back(&Dst); |
| |
| auto &FI = CGM.getTypes().arrangeFreeFunctionDeclaration( |
| CGM.getContext().VoidTy, Args, FunctionType::ExtInfo(), |
| /*isVariadic=*/false); |
| auto FTy = CGM.getTypes().GetFunctionType(FI); |
| auto Fn = CGM.CreateGlobalInitOrDestructFunction( |
| FTy, ".__kmpc_global_dtor_.", Loc); |
| DtorCGF.StartFunction(GlobalDecl(), CGM.getContext().VoidTy, Fn, FI, Args, |
| SourceLocation()); |
| auto ArgVal = DtorCGF.EmitLoadOfScalar( |
| DtorCGF.GetAddrOfLocalVar(&Dst), |
| /*Volatile=*/false, CGM.PointerAlignInBytes, |
| CGM.getContext().VoidPtrTy, Dst.getLocation()); |
| DtorCGF.emitDestroy(ArgVal, ASTTy, |
| DtorCGF.getDestroyer(ASTTy.isDestructedType()), |
| DtorCGF.needsEHCleanup(ASTTy.isDestructedType())); |
| DtorCGF.FinishFunction(); |
| Dtor = Fn; |
| } |
| // Do not emit init function if it is not required. |
| if (!Ctor && !Dtor) |
| return nullptr; |
| |
| llvm::Type *CopyCtorTyArgs[] = {CGM.VoidPtrTy, CGM.VoidPtrTy}; |
| auto CopyCtorTy = |
| llvm::FunctionType::get(CGM.VoidPtrTy, CopyCtorTyArgs, |
| /*isVarArg=*/false)->getPointerTo(); |
| // Copying constructor for the threadprivate variable. |
| // Must be NULL - reserved by runtime, but currently it requires that this |
| // parameter is always NULL. Otherwise it fires assertion. |
| CopyCtor = llvm::Constant::getNullValue(CopyCtorTy); |
| if (Ctor == nullptr) { |
| auto CtorTy = llvm::FunctionType::get(CGM.VoidPtrTy, CGM.VoidPtrTy, |
| /*isVarArg=*/false)->getPointerTo(); |
| Ctor = llvm::Constant::getNullValue(CtorTy); |
| } |
| if (Dtor == nullptr) { |
| auto DtorTy = llvm::FunctionType::get(CGM.VoidTy, CGM.VoidPtrTy, |
| /*isVarArg=*/false)->getPointerTo(); |
| Dtor = llvm::Constant::getNullValue(DtorTy); |
| } |
| if (!CGF) { |
| auto InitFunctionTy = |
| llvm::FunctionType::get(CGM.VoidTy, /*isVarArg*/ false); |
| auto InitFunction = CGM.CreateGlobalInitOrDestructFunction( |
| InitFunctionTy, ".__omp_threadprivate_init_."); |
| CodeGenFunction InitCGF(CGM); |
| FunctionArgList ArgList; |
| InitCGF.StartFunction(GlobalDecl(), CGM.getContext().VoidTy, InitFunction, |
| CGM.getTypes().arrangeNullaryFunction(), ArgList, |
| Loc); |
| EmitOMPThreadPrivateVarInit(InitCGF, VDAddr, Ctor, CopyCtor, Dtor, Loc); |
| InitCGF.FinishFunction(); |
| return InitFunction; |
| } |
| EmitOMPThreadPrivateVarInit(*CGF, VDAddr, Ctor, CopyCtor, Dtor, Loc); |
| } |
| return nullptr; |
| } |
| |
| void CGOpenMPRuntime::EmitOMPParallelCall(CodeGenFunction &CGF, |
| SourceLocation Loc, |
| llvm::Value *OutlinedFn, |
| llvm::Value *CapturedStruct) { |
| // Build call __kmpc_fork_call(loc, 1, microtask, captured_struct/*context*/) |
| llvm::Value *Args[] = { |
| EmitOpenMPUpdateLocation(CGF, Loc), |
| CGF.Builder.getInt32(1), // Number of arguments after 'microtask' argument |
| // (there is only one additional argument - 'context') |
| CGF.Builder.CreateBitCast(OutlinedFn, getKmpc_MicroPointerTy()), |
| CGF.EmitCastToVoidPtr(CapturedStruct)}; |
| auto RTLFn = CreateRuntimeFunction(CGOpenMPRuntime::OMPRTL__kmpc_fork_call); |
| CGF.EmitRuntimeCall(RTLFn, Args); |
| } |
| |
| void CGOpenMPRuntime::EmitOMPSerialCall(CodeGenFunction &CGF, |
| SourceLocation Loc, |
| llvm::Value *OutlinedFn, |
| llvm::Value *CapturedStruct) { |
| auto ThreadID = GetOpenMPThreadID(CGF, Loc); |
| // Build calls: |
| // __kmpc_serialized_parallel(&Loc, GTid); |
| llvm::Value *SerArgs[] = {EmitOpenMPUpdateLocation(CGF, Loc), ThreadID}; |
| auto RTLFn = |
| CreateRuntimeFunction(CGOpenMPRuntime::OMPRTL__kmpc_serialized_parallel); |
| CGF.EmitRuntimeCall(RTLFn, SerArgs); |
| |
| // OutlinedFn(>id, &zero, CapturedStruct); |
| auto ThreadIDAddr = EmitThreadIDAddress(CGF, Loc); |
| auto Int32Ty = |
| CGF.getContext().getIntTypeForBitwidth(/*DestWidth*/ 32, /*Signed*/ true); |
| auto ZeroAddr = CGF.CreateMemTemp(Int32Ty, /*Name*/ ".zero.addr"); |
| CGF.InitTempAlloca(ZeroAddr, CGF.Builder.getInt32(/*C*/ 0)); |
| llvm::Value *OutlinedFnArgs[] = {ThreadIDAddr, ZeroAddr, CapturedStruct}; |
| CGF.EmitCallOrInvoke(OutlinedFn, OutlinedFnArgs); |
| |
| // __kmpc_end_serialized_parallel(&Loc, GTid); |
| llvm::Value *EndSerArgs[] = {EmitOpenMPUpdateLocation(CGF, Loc), ThreadID}; |
| RTLFn = CreateRuntimeFunction( |
| CGOpenMPRuntime::OMPRTL__kmpc_end_serialized_parallel); |
| CGF.EmitRuntimeCall(RTLFn, EndSerArgs); |
| } |
| |
| // If we're inside an (outlined) parallel region, use the region info's |
| // thread-ID variable (it is passed in a first argument of the outlined function |
| // as "kmp_int32 *gtid"). Otherwise, if we're not inside parallel region, but in |
| // regular serial code region, get thread ID by calling kmp_int32 |
| // kmpc_global_thread_num(ident_t *loc), stash this thread ID in a temporary and |
| // return the address of that temp. |
| llvm::Value *CGOpenMPRuntime::EmitThreadIDAddress(CodeGenFunction &CGF, |
| SourceLocation Loc) { |
| if (auto OMPRegionInfo = |
| dyn_cast_or_null<CGOpenMPRegionInfo>(CGF.CapturedStmtInfo)) |
| return CGF.EmitLoadOfLValue(OMPRegionInfo->getThreadIDVariableLValue(CGF), |
| SourceLocation()).getScalarVal(); |
| auto ThreadID = GetOpenMPThreadID(CGF, Loc); |
| auto Int32Ty = |
| CGF.getContext().getIntTypeForBitwidth(/*DestWidth*/ 32, /*Signed*/ true); |
| auto ThreadIDTemp = CGF.CreateMemTemp(Int32Ty, /*Name*/ ".threadid_temp."); |
| CGF.EmitStoreOfScalar(ThreadID, |
| CGF.MakeNaturalAlignAddrLValue(ThreadIDTemp, Int32Ty)); |
| |
| return ThreadIDTemp; |
| } |
| |
| llvm::Constant * |
| CGOpenMPRuntime::GetOrCreateInternalVariable(llvm::Type *Ty, |
| const llvm::Twine &Name) { |
| SmallString<256> Buffer; |
| llvm::raw_svector_ostream Out(Buffer); |
| Out << Name; |
| auto RuntimeName = Out.str(); |
| auto &Elem = *InternalVars.insert(std::make_pair(RuntimeName, nullptr)).first; |
| if (Elem.second) { |
| assert(Elem.second->getType()->getPointerElementType() == Ty && |
| "OMP internal variable has different type than requested"); |
| return &*Elem.second; |
| } |
| |
| return Elem.second = new llvm::GlobalVariable( |
| CGM.getModule(), Ty, /*IsConstant*/ false, |
| llvm::GlobalValue::CommonLinkage, llvm::Constant::getNullValue(Ty), |
| Elem.first()); |
| } |
| |
| llvm::Value *CGOpenMPRuntime::GetCriticalRegionLock(StringRef CriticalName) { |
| llvm::Twine Name(".gomp_critical_user_", CriticalName); |
| return GetOrCreateInternalVariable(KmpCriticalNameTy, Name.concat(".var")); |
| } |
| |
| void CGOpenMPRuntime::EmitOMPCriticalRegion( |
| CodeGenFunction &CGF, StringRef CriticalName, |
| const std::function<void()> &CriticalOpGen, SourceLocation Loc) { |
| auto RegionLock = GetCriticalRegionLock(CriticalName); |
| // __kmpc_critical(ident_t *, gtid, Lock); |
| // CriticalOpGen(); |
| // __kmpc_end_critical(ident_t *, gtid, Lock); |
| // Prepare arguments and build a call to __kmpc_critical |
| llvm::Value *Args[] = {EmitOpenMPUpdateLocation(CGF, Loc), |
| GetOpenMPThreadID(CGF, Loc), RegionLock}; |
| auto RTLFn = CreateRuntimeFunction(CGOpenMPRuntime::OMPRTL__kmpc_critical); |
| CGF.EmitRuntimeCall(RTLFn, Args); |
| CriticalOpGen(); |
| // Build a call to __kmpc_end_critical |
| RTLFn = CreateRuntimeFunction(CGOpenMPRuntime::OMPRTL__kmpc_end_critical); |
| CGF.EmitRuntimeCall(RTLFn, Args); |
| } |
| |
| void CGOpenMPRuntime::EmitOMPBarrierCall(CodeGenFunction &CGF, |
| SourceLocation Loc, |
| OpenMPLocationFlags Flags) { |
| // Build call __kmpc_barrier(loc, thread_id) |
| llvm::Value *Args[] = {EmitOpenMPUpdateLocation(CGF, Loc, Flags), |
| GetOpenMPThreadID(CGF, Loc)}; |
| auto RTLFn = CreateRuntimeFunction(CGOpenMPRuntime::OMPRTL__kmpc_barrier); |
| CGF.EmitRuntimeCall(RTLFn, Args); |
| } |
| |
| void CGOpenMPRuntime::EmitOMPNumThreadsClause(CodeGenFunction &CGF, |
| llvm::Value *NumThreads, |
| SourceLocation Loc) { |
| // Build call __kmpc_push_num_threads(&loc, global_tid, num_threads) |
| llvm::Value *Args[] = { |
| EmitOpenMPUpdateLocation(CGF, Loc), GetOpenMPThreadID(CGF, Loc), |
| CGF.Builder.CreateIntCast(NumThreads, CGF.Int32Ty, /*isSigned*/ true)}; |
| llvm::Constant *RTLFn = CGF.CGM.getOpenMPRuntime().CreateRuntimeFunction( |
| CGOpenMPRuntime::OMPRTL__kmpc_push_num_threads); |
| CGF.EmitRuntimeCall(RTLFn, Args); |
| } |
| |
| void CGOpenMPRuntime::EmitOMPFlush(CodeGenFunction &CGF, ArrayRef<const Expr *>, |
| SourceLocation Loc) { |
| // Build call void __kmpc_flush(ident_t *loc, ...) |
| // FIXME: List of variables is ignored by libiomp5 runtime, no need to |
| // generate it, just request full memory fence. |
| llvm::Value *Args[] = {EmitOpenMPUpdateLocation(CGF, Loc), |
| llvm::ConstantInt::get(CGM.Int32Ty, 0)}; |
| auto *RTLFn = CGF.CGM.getOpenMPRuntime().CreateRuntimeFunction( |
| CGOpenMPRuntime::OMPRTL__kmpc_flush); |
| CGF.EmitRuntimeCall(RTLFn, Args); |
| } |