diff options
Diffstat (limited to 'lib/CodeGen/CGOpenMPRuntime.cpp')
| -rw-r--r-- | lib/CodeGen/CGOpenMPRuntime.cpp | 2202 |
1 files changed, 1871 insertions, 331 deletions
diff --git a/lib/CodeGen/CGOpenMPRuntime.cpp b/lib/CodeGen/CGOpenMPRuntime.cpp index 22ee00f2c7ae..1238accf42d7 100644 --- a/lib/CodeGen/CGOpenMPRuntime.cpp +++ b/lib/CodeGen/CGOpenMPRuntime.cpp @@ -13,6 +13,7 @@ #include "CGOpenMPRuntime.h" #include "CodeGenFunction.h" +#include "CGCleanup.h" #include "clang/AST/Decl.h" #include "clang/AST/StmtOpenMP.h" #include "llvm/ADT/ArrayRef.h" @@ -27,61 +28,236 @@ using namespace clang; using namespace CodeGen; namespace { -/// \brief API for captured statement code generation in OpenMP constructs. +/// \brief Base class for handling code generation inside OpenMP regions. 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 Kinds of OpenMP regions used in codegen. + enum CGOpenMPRegionKind { + /// \brief Region with outlined function for standalone 'parallel' + /// directive. + ParallelOutlinedRegion, + /// \brief Region with outlined function for standalone 'task' directive. + TaskOutlinedRegion, + /// \brief Region for constructs that do not require function outlining, + /// like 'for', 'sections', 'atomic' etc. directives. + InlinedRegion, + }; + + CGOpenMPRegionInfo(const CapturedStmt &CS, + const CGOpenMPRegionKind RegionKind, + const RegionCodeGenTy &CodeGen) + : CGCapturedStmtInfo(CS, CR_OpenMP), RegionKind(RegionKind), + CodeGen(CodeGen) {} + + CGOpenMPRegionInfo(const CGOpenMPRegionKind RegionKind, + const RegionCodeGenTy &CodeGen) + : CGCapturedStmtInfo(CR_OpenMP), RegionKind(RegionKind), + CodeGen(CodeGen) {} - /// \brief Gets a variable or parameter for storing global thread id + /// \brief Get a variable or parameter for storing global thread id /// inside OpenMP construct. - const VarDecl *getThreadIDVariable() const { return ThreadIDVar; } + virtual const VarDecl *getThreadIDVariable() const = 0; - /// \brief Gets an LValue for the current ThreadID variable. - LValue getThreadIDVariableLValue(CodeGenFunction &CGF); + /// \brief Emit the captured statement body. + virtual void EmitBody(CodeGenFunction &CGF, const Stmt *S) override; + + /// \brief Get an LValue for the current ThreadID variable. + /// \return LValue for thread id variable. This LValue always has type int32*. + virtual LValue getThreadIDVariableLValue(CodeGenFunction &CGF); + + CGOpenMPRegionKind getRegionKind() const { return RegionKind; } static bool classof(const CGCapturedStmtInfo *Info) { return Info->getKind() == CR_OpenMP; } - /// \brief Emit the captured statement body. - void EmitBody(CodeGenFunction &CGF, Stmt *S) override; +protected: + CGOpenMPRegionKind RegionKind; + const RegionCodeGenTy &CodeGen; +}; + +/// \brief API for captured statement code generation in OpenMP constructs. +class CGOpenMPOutlinedRegionInfo : public CGOpenMPRegionInfo { +public: + CGOpenMPOutlinedRegionInfo(const CapturedStmt &CS, const VarDecl *ThreadIDVar, + const RegionCodeGenTy &CodeGen) + : CGOpenMPRegionInfo(CS, ParallelOutlinedRegion, CodeGen), + ThreadIDVar(ThreadIDVar) { + assert(ThreadIDVar != nullptr && "No ThreadID in OpenMP region."); + } + /// \brief Get a variable or parameter for storing global thread id + /// inside OpenMP construct. + const VarDecl *getThreadIDVariable() const override { return ThreadIDVar; } /// \brief Get the name of the capture helper. StringRef getHelperName() const override { return ".omp_outlined."; } + static bool classof(const CGCapturedStmtInfo *Info) { + return CGOpenMPRegionInfo::classof(Info) && + cast<CGOpenMPRegionInfo>(Info)->getRegionKind() == + ParallelOutlinedRegion; + } + 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; }; + +/// \brief API for captured statement code generation in OpenMP constructs. +class CGOpenMPTaskOutlinedRegionInfo : public CGOpenMPRegionInfo { +public: + CGOpenMPTaskOutlinedRegionInfo(const CapturedStmt &CS, + const VarDecl *ThreadIDVar, + const RegionCodeGenTy &CodeGen) + : CGOpenMPRegionInfo(CS, TaskOutlinedRegion, CodeGen), + ThreadIDVar(ThreadIDVar) { + assert(ThreadIDVar != nullptr && "No ThreadID in OpenMP region."); + } + /// \brief Get a variable or parameter for storing global thread id + /// inside OpenMP construct. + const VarDecl *getThreadIDVariable() const override { return ThreadIDVar; } + + /// \brief Get an LValue for the current ThreadID variable. + LValue getThreadIDVariableLValue(CodeGenFunction &CGF) override; + + /// \brief Get the name of the capture helper. + StringRef getHelperName() const override { return ".omp_outlined."; } + + static bool classof(const CGCapturedStmtInfo *Info) { + return CGOpenMPRegionInfo::classof(Info) && + cast<CGOpenMPRegionInfo>(Info)->getRegionKind() == + TaskOutlinedRegion; + } + +private: + /// \brief A variable or parameter storing global thread id for OpenMP + /// constructs. + const VarDecl *ThreadIDVar; +}; + +/// \brief API for inlined captured statement code generation in OpenMP +/// constructs. +class CGOpenMPInlinedRegionInfo : public CGOpenMPRegionInfo { +public: + CGOpenMPInlinedRegionInfo(CodeGenFunction::CGCapturedStmtInfo *OldCSI, + const RegionCodeGenTy &CodeGen) + : CGOpenMPRegionInfo(InlinedRegion, CodeGen), OldCSI(OldCSI), + OuterRegionInfo(dyn_cast_or_null<CGOpenMPRegionInfo>(OldCSI)) {} + // \brief Retrieve the value of the context parameter. + llvm::Value *getContextValue() const override { + if (OuterRegionInfo) + return OuterRegionInfo->getContextValue(); + llvm_unreachable("No context value for inlined OpenMP region"); + } + virtual void setContextValue(llvm::Value *V) override { + if (OuterRegionInfo) { + OuterRegionInfo->setContextValue(V); + return; + } + llvm_unreachable("No context value for inlined OpenMP region"); + } + /// \brief Lookup the captured field decl for a variable. + const FieldDecl *lookup(const VarDecl *VD) const override { + if (OuterRegionInfo) + return OuterRegionInfo->lookup(VD); + // If there is no outer outlined region,no need to lookup in a list of + // captured variables, we can use the original one. + return nullptr; + } + FieldDecl *getThisFieldDecl() const override { + if (OuterRegionInfo) + return OuterRegionInfo->getThisFieldDecl(); + return nullptr; + } + /// \brief Get a variable or parameter for storing global thread id + /// inside OpenMP construct. + const VarDecl *getThreadIDVariable() const override { + if (OuterRegionInfo) + return OuterRegionInfo->getThreadIDVariable(); + return nullptr; + } + + /// \brief Get the name of the capture helper. + StringRef getHelperName() const override { + if (auto *OuterRegionInfo = getOldCSI()) + return OuterRegionInfo->getHelperName(); + llvm_unreachable("No helper name for inlined OpenMP construct"); + } + + CodeGenFunction::CGCapturedStmtInfo *getOldCSI() const { return OldCSI; } + + static bool classof(const CGCapturedStmtInfo *Info) { + return CGOpenMPRegionInfo::classof(Info) && + cast<CGOpenMPRegionInfo>(Info)->getRegionKind() == InlinedRegion; + } + +private: + /// \brief CodeGen info about outer OpenMP region. + CodeGenFunction::CGCapturedStmtInfo *OldCSI; + CGOpenMPRegionInfo *OuterRegionInfo; +}; + +/// \brief RAII for emitting code of OpenMP constructs. +class InlinedOpenMPRegionRAII { + CodeGenFunction &CGF; + +public: + /// \brief Constructs region for combined constructs. + /// \param CodeGen Code generation sequence for combined directives. Includes + /// a list of functions used for code generation of implicitly inlined + /// regions. + InlinedOpenMPRegionRAII(CodeGenFunction &CGF, const RegionCodeGenTy &CodeGen) + : CGF(CGF) { + // Start emission for the construct. + CGF.CapturedStmtInfo = + new CGOpenMPInlinedRegionInfo(CGF.CapturedStmtInfo, CodeGen); + } + ~InlinedOpenMPRegionRAII() { + // Restore original CapturedStmtInfo only if we're done with code emission. + auto *OldCSI = + cast<CGOpenMPInlinedRegionInfo>(CGF.CapturedStmtInfo)->getOldCSI(); + delete CGF.CapturedStmtInfo; + CGF.CapturedStmtInfo = OldCSI; + } +}; + } // namespace LValue CGOpenMPRegionInfo::getThreadIDVariableLValue(CodeGenFunction &CGF) { return CGF.MakeNaturalAlignAddrLValue( - CGF.GetAddrOfLocalVar(ThreadIDVar), - CGF.getContext().getPointerType(ThreadIDVar->getType())); + CGF.Builder.CreateAlignedLoad( + CGF.GetAddrOfLocalVar(getThreadIDVariable()), + CGF.PointerAlignInBytes), + getThreadIDVariable() + ->getType() + ->castAs<PointerType>() + ->getPointeeType()); } -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. - CGF.CGM.getOpenMPRuntime().EmitOMPBarrierCall(CGF, Directive.getLocStart(), - /*IsExplicit=*/false); - CGCapturedStmtInfo::EmitBody(CGF, S); +void CGOpenMPRegionInfo::EmitBody(CodeGenFunction &CGF, const Stmt * /*S*/) { + // 1.2.2 OpenMP Language Terminology + // Structured block - An executable statement with a single entry at the + // top and a single exit at the bottom. + // The point of exit cannot be a branch out of the structured block. + // longjmp() and throw() must not violate the entry/exit criteria. + CGF.EHStack.pushTerminate(); + { + CodeGenFunction::RunCleanupsScope Scope(CGF); + CodeGen(CGF); + } + CGF.EHStack.popTerminate(); +} + +LValue CGOpenMPTaskOutlinedRegionInfo::getThreadIDVariableLValue( + CodeGenFunction &CGF) { + return CGF.MakeNaturalAlignAddrLValue( + CGF.GetAddrOfLocalVar(getThreadIDVariable()), + getThreadIDVariable()->getType()); } CGOpenMPRuntime::CGOpenMPRuntime(CodeGenModule &CGM) - : CGM(CGM), DefaultOpenMPPSource(nullptr) { + : CGM(CGM), DefaultOpenMPPSource(nullptr), KmpRoutineEntryPtrTy(nullptr) { IdentTy = llvm::StructType::create( "ident_t", CGM.Int32Ty /* reserved_1 */, CGM.Int32Ty /* flags */, CGM.Int32Ty /* reserved_2 */, CGM.Int32Ty /* reserved_3 */, @@ -93,18 +269,38 @@ CGOpenMPRuntime::CGOpenMPRuntime(CodeGenModule &CGM) KmpCriticalNameTy = llvm::ArrayType::get(CGM.Int32Ty, /*NumElements*/ 8); } +void CGOpenMPRuntime::clear() { + InternalVars.clear(); +} + llvm::Value * -CGOpenMPRuntime::EmitOpenMPOutlinedFunction(const OMPExecutableDirective &D, - const VarDecl *ThreadIDVar) { +CGOpenMPRuntime::emitParallelOutlinedFunction(const OMPExecutableDirective &D, + const VarDecl *ThreadIDVar, + const RegionCodeGenTy &CodeGen) { + assert(ThreadIDVar->getType()->isPointerType() && + "thread id variable must be of type kmp_int32 *"); const CapturedStmt *CS = cast<CapturedStmt>(D.getAssociatedStmt()); CodeGenFunction CGF(CGM, true); - CGOpenMPRegionInfo CGInfo(D, *CS, ThreadIDVar); + CGOpenMPOutlinedRegionInfo CGInfo(*CS, ThreadIDVar, CodeGen); CGF.CapturedStmtInfo = &CGInfo; return CGF.GenerateCapturedStmtFunction(*CS); } llvm::Value * -CGOpenMPRuntime::GetOrCreateDefaultOpenMPLocation(OpenMPLocationFlags Flags) { +CGOpenMPRuntime::emitTaskOutlinedFunction(const OMPExecutableDirective &D, + const VarDecl *ThreadIDVar, + const RegionCodeGenTy &CodeGen) { + assert(!ThreadIDVar->getType()->isPointerType() && + "thread id variable must be of type kmp_int32 for tasks"); + auto *CS = cast<CapturedStmt>(D.getAssociatedStmt()); + CodeGenFunction CGF(CGM, true); + CGOpenMPTaskOutlinedRegionInfo CGInfo(*CS, ThreadIDVar, CodeGen); + CGF.CapturedStmtInfo = &CGInfo; + return CGF.GenerateCapturedStmtFunction(*CS); +} + +llvm::Value * +CGOpenMPRuntime::getOrCreateDefaultLocation(OpenMPLocationFlags Flags) { llvm::Value *Entry = OpenMPDefaultLocMap.lookup(Flags); if (!Entry) { if (!DefaultOpenMPPSource) { @@ -134,12 +330,13 @@ CGOpenMPRuntime::GetOrCreateDefaultOpenMPLocation(OpenMPLocationFlags Flags) { return Entry; } -llvm::Value *CGOpenMPRuntime::EmitOpenMPUpdateLocation( - CodeGenFunction &CGF, SourceLocation Loc, OpenMPLocationFlags Flags) { +llvm::Value *CGOpenMPRuntime::emitUpdateLocation(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); + return getOrCreateDefaultLocation(Flags); assert(CGF.CurFn && "No function in current CodeGenFunction."); @@ -159,14 +356,14 @@ llvm::Value *CGOpenMPRuntime::EmitOpenMPUpdateLocation( CGBuilderTy::InsertPointGuard IPG(CGF.Builder); CGF.Builder.SetInsertPoint(CGF.AllocaInsertPt); - CGF.Builder.CreateMemCpy(LocValue, GetOrCreateDefaultOpenMPLocation(Flags), + CGF.Builder.CreateMemCpy(LocValue, getOrCreateDefaultLocation(Flags), llvm::ConstantExpr::getSizeOf(IdentTy), CGM.PointerAlignInBytes); } // char **psource = &.kmpc_loc_<flags>.addr.psource; - auto *PSource = - CGF.Builder.CreateConstInBoundsGEP2_32(LocValue, 0, IdentField_PSource); + auto *PSource = CGF.Builder.CreateConstInBoundsGEP2_32(IdentTy, LocValue, 0, + IdentField_PSource); auto OMPDebugLoc = OpenMPDebugLocMap.lookup(Loc.getRawEncoding()); if (OMPDebugLoc == nullptr) { @@ -189,8 +386,8 @@ llvm::Value *CGOpenMPRuntime::EmitOpenMPUpdateLocation( return LocValue; } -llvm::Value *CGOpenMPRuntime::GetOpenMPThreadID(CodeGenFunction &CGF, - SourceLocation Loc) { +llvm::Value *CGOpenMPRuntime::getThreadID(CodeGenFunction &CGF, + SourceLocation Loc) { assert(CGF.CurFn && "No function in current CodeGenFunction."); llvm::Value *ThreadID = nullptr; @@ -204,36 +401,35 @@ llvm::Value *CGOpenMPRuntime::GetOpenMPThreadID(CodeGenFunction &CGF, } 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; + if (OMPRegionInfo->getThreadIDVariable()) { + // Check if this an outlined function with thread id passed as argument. + auto LVal = OMPRegionInfo->getThreadIDVariableLValue(CGF); + 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; + } + return 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; } + + // 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); + ThreadID = + CGF.EmitRuntimeCall(createRuntimeFunction(OMPRTL__kmpc_global_thread_num), + emitUpdateLocation(CGF, Loc)); + auto &Elem = OpenMPLocThreadIDMap.FindAndConstruct(CGF.CurFn); + Elem.second.ThreadID = ThreadID; return ThreadID; } -void CGOpenMPRuntime::FunctionFinished(CodeGenFunction &CGF) { +void CGOpenMPRuntime::functionFinished(CodeGenFunction &CGF) { assert(CGF.CurFn && "No function in current CodeGenFunction."); if (OpenMPLocThreadIDMap.count(CGF.CurFn)) OpenMPLocThreadIDMap.erase(CGF.CurFn); @@ -248,7 +444,7 @@ llvm::Type *CGOpenMPRuntime::getKmpc_MicroPointerTy() { } llvm::Constant * -CGOpenMPRuntime::CreateRuntimeFunction(OpenMPRTLFunction Function) { +CGOpenMPRuntime::createRuntimeFunction(OpenMPRTLFunction Function) { llvm::Constant *RTLFn = nullptr; switch (Function) { case OMPRTL__kmpc_fork_call: { @@ -334,87 +530,6 @@ CGOpenMPRuntime::CreateRuntimeFunction(OpenMPRTLFunction Function) { RTLFn = CGM.CreateRuntimeFunction(FnTy, /*Name*/ "__kmpc_cancel_barrier"); break; } - // Build __kmpc_for_static_init*( - // ident_t *loc, kmp_int32 tid, kmp_int32 schedtype, - // kmp_int32 *p_lastiter, kmp_int[32|64] *p_lower, - // kmp_int[32|64] *p_upper, kmp_int[32|64] *p_stride, - // kmp_int[32|64] incr, kmp_int[32|64] chunk); - case OMPRTL__kmpc_for_static_init_4: { - auto ITy = CGM.Int32Ty; - auto PtrTy = llvm::PointerType::getUnqual(ITy); - llvm::Type *TypeParams[] = { - getIdentTyPointerTy(), // loc - CGM.Int32Ty, // tid - CGM.Int32Ty, // schedtype - llvm::PointerType::getUnqual(CGM.Int32Ty), // p_lastiter - PtrTy, // p_lower - PtrTy, // p_upper - PtrTy, // p_stride - ITy, // incr - ITy // chunk - }; - llvm::FunctionType *FnTy = - llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ false); - RTLFn = CGM.CreateRuntimeFunction(FnTy, "__kmpc_for_static_init_4"); - break; - } - case OMPRTL__kmpc_for_static_init_4u: { - auto ITy = CGM.Int32Ty; - auto PtrTy = llvm::PointerType::getUnqual(ITy); - llvm::Type *TypeParams[] = { - getIdentTyPointerTy(), // loc - CGM.Int32Ty, // tid - CGM.Int32Ty, // schedtype - llvm::PointerType::getUnqual(CGM.Int32Ty), // p_lastiter - PtrTy, // p_lower - PtrTy, // p_upper - PtrTy, // p_stride - ITy, // incr - ITy // chunk - }; - llvm::FunctionType *FnTy = - llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ false); - RTLFn = CGM.CreateRuntimeFunction(FnTy, "__kmpc_for_static_init_4u"); - break; - } - case OMPRTL__kmpc_for_static_init_8: { - auto ITy = CGM.Int64Ty; - auto PtrTy = llvm::PointerType::getUnqual(ITy); - llvm::Type *TypeParams[] = { - getIdentTyPointerTy(), // loc - CGM.Int32Ty, // tid - CGM.Int32Ty, // schedtype - llvm::PointerType::getUnqual(CGM.Int32Ty), // p_lastiter - PtrTy, // p_lower - PtrTy, // p_upper - PtrTy, // p_stride - ITy, // incr - ITy // chunk - }; - llvm::FunctionType *FnTy = - llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ false); - RTLFn = CGM.CreateRuntimeFunction(FnTy, "__kmpc_for_static_init_8"); - break; - } - case OMPRTL__kmpc_for_static_init_8u: { - auto ITy = CGM.Int64Ty; - auto PtrTy = llvm::PointerType::getUnqual(ITy); - llvm::Type *TypeParams[] = { - getIdentTyPointerTy(), // loc - CGM.Int32Ty, // tid - CGM.Int32Ty, // schedtype - llvm::PointerType::getUnqual(CGM.Int32Ty), // p_lastiter - PtrTy, // p_lower - PtrTy, // p_upper - PtrTy, // p_stride - ITy, // incr - ITy // chunk - }; - llvm::FunctionType *FnTy = - llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ false); - RTLFn = CGM.CreateRuntimeFunction(FnTy, "__kmpc_for_static_init_8u"); - break; - } case OMPRTL__kmpc_for_static_fini: { // Build void __kmpc_for_static_fini(ident_t *loc, kmp_int32 global_tid); llvm::Type *TypeParams[] = {getIdentTyPointerTy(), CGM.Int32Ty}; @@ -452,10 +567,10 @@ CGOpenMPRuntime::CreateRuntimeFunction(OpenMPRTLFunction Function) { break; } case OMPRTL__kmpc_flush: { - // Build void __kmpc_flush(ident_t *loc, ...); + // Build void __kmpc_flush(ident_t *loc); llvm::Type *TypeParams[] = {getIdentTyPointerTy()}; llvm::FunctionType *FnTy = - llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ true); + llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ false); RTLFn = CGM.CreateRuntimeFunction(FnTy, "__kmpc_flush"); break; } @@ -475,38 +590,291 @@ CGOpenMPRuntime::CreateRuntimeFunction(OpenMPRTLFunction Function) { RTLFn = CGM.CreateRuntimeFunction(FnTy, /*Name=*/"__kmpc_end_master"); break; } + case OMPRTL__kmpc_omp_taskyield: { + // Build kmp_int32 __kmpc_omp_taskyield(ident_t *, kmp_int32 global_tid, + // int end_part); + llvm::Type *TypeParams[] = {getIdentTyPointerTy(), CGM.Int32Ty, CGM.IntTy}; + llvm::FunctionType *FnTy = + llvm::FunctionType::get(CGM.Int32Ty, TypeParams, /*isVarArg=*/false); + RTLFn = CGM.CreateRuntimeFunction(FnTy, /*Name=*/"__kmpc_omp_taskyield"); + break; + } + case OMPRTL__kmpc_single: { + // Build kmp_int32 __kmpc_single(ident_t *loc, kmp_int32 global_tid); + llvm::Type *TypeParams[] = {getIdentTyPointerTy(), CGM.Int32Ty}; + llvm::FunctionType *FnTy = + llvm::FunctionType::get(CGM.Int32Ty, TypeParams, /*isVarArg=*/false); + RTLFn = CGM.CreateRuntimeFunction(FnTy, /*Name=*/"__kmpc_single"); + break; + } + case OMPRTL__kmpc_end_single: { + // Build void __kmpc_end_single(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_end_single"); + break; + } + case OMPRTL__kmpc_omp_task_alloc: { + // Build kmp_task_t *__kmpc_omp_task_alloc(ident_t *, kmp_int32 gtid, + // kmp_int32 flags, size_t sizeof_kmp_task_t, size_t sizeof_shareds, + // kmp_routine_entry_t *task_entry); + assert(KmpRoutineEntryPtrTy != nullptr && + "Type kmp_routine_entry_t must be created."); + llvm::Type *TypeParams[] = {getIdentTyPointerTy(), CGM.Int32Ty, CGM.Int32Ty, + CGM.SizeTy, CGM.SizeTy, KmpRoutineEntryPtrTy}; + // Return void * and then cast to particular kmp_task_t type. + llvm::FunctionType *FnTy = + llvm::FunctionType::get(CGM.VoidPtrTy, TypeParams, /*isVarArg=*/false); + RTLFn = CGM.CreateRuntimeFunction(FnTy, /*Name=*/"__kmpc_omp_task_alloc"); + break; + } + case OMPRTL__kmpc_omp_task: { + // Build kmp_int32 __kmpc_omp_task(ident_t *, kmp_int32 gtid, kmp_task_t + // *new_task); + llvm::Type *TypeParams[] = {getIdentTyPointerTy(), CGM.Int32Ty, + CGM.VoidPtrTy}; + llvm::FunctionType *FnTy = + llvm::FunctionType::get(CGM.Int32Ty, TypeParams, /*isVarArg=*/false); + RTLFn = CGM.CreateRuntimeFunction(FnTy, /*Name=*/"__kmpc_omp_task"); + break; + } + case OMPRTL__kmpc_copyprivate: { + // Build void __kmpc_copyprivate(ident_t *loc, kmp_int32 global_tid, + // size_t cpy_size, void *cpy_data, void(*cpy_func)(void *, void *), + // kmp_int32 didit); + llvm::Type *CpyTypeParams[] = {CGM.VoidPtrTy, CGM.VoidPtrTy}; + auto *CpyFnTy = + llvm::FunctionType::get(CGM.VoidTy, CpyTypeParams, /*isVarArg=*/false); + llvm::Type *TypeParams[] = {getIdentTyPointerTy(), CGM.Int32Ty, CGM.SizeTy, + CGM.VoidPtrTy, CpyFnTy->getPointerTo(), + CGM.Int32Ty}; + llvm::FunctionType *FnTy = + llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg=*/false); + RTLFn = CGM.CreateRuntimeFunction(FnTy, /*Name=*/"__kmpc_copyprivate"); + break; + } + case OMPRTL__kmpc_reduce: { + // Build kmp_int32 __kmpc_reduce(ident_t *loc, kmp_int32 global_tid, + // kmp_int32 num_vars, size_t reduce_size, void *reduce_data, void + // (*reduce_func)(void *lhs_data, void *rhs_data), kmp_critical_name *lck); + llvm::Type *ReduceTypeParams[] = {CGM.VoidPtrTy, CGM.VoidPtrTy}; + auto *ReduceFnTy = llvm::FunctionType::get(CGM.VoidTy, ReduceTypeParams, + /*isVarArg=*/false); + llvm::Type *TypeParams[] = { + getIdentTyPointerTy(), CGM.Int32Ty, CGM.Int32Ty, CGM.SizeTy, + CGM.VoidPtrTy, ReduceFnTy->getPointerTo(), + llvm::PointerType::getUnqual(KmpCriticalNameTy)}; + llvm::FunctionType *FnTy = + llvm::FunctionType::get(CGM.Int32Ty, TypeParams, /*isVarArg=*/false); + RTLFn = CGM.CreateRuntimeFunction(FnTy, /*Name=*/"__kmpc_reduce"); + break; + } + case OMPRTL__kmpc_reduce_nowait: { + // Build kmp_int32 __kmpc_reduce_nowait(ident_t *loc, kmp_int32 + // global_tid, kmp_int32 num_vars, size_t reduce_size, void *reduce_data, + // void (*reduce_func)(void *lhs_data, void *rhs_data), kmp_critical_name + // *lck); + llvm::Type *ReduceTypeParams[] = {CGM.VoidPtrTy, CGM.VoidPtrTy}; + auto *ReduceFnTy = llvm::FunctionType::get(CGM.VoidTy, ReduceTypeParams, + /*isVarArg=*/false); + llvm::Type *TypeParams[] = { + getIdentTyPointerTy(), CGM.Int32Ty, CGM.Int32Ty, CGM.SizeTy, + CGM.VoidPtrTy, ReduceFnTy->getPointerTo(), + llvm::PointerType::getUnqual(KmpCriticalNameTy)}; + llvm::FunctionType *FnTy = + llvm::FunctionType::get(CGM.Int32Ty, TypeParams, /*isVarArg=*/false); + RTLFn = CGM.CreateRuntimeFunction(FnTy, /*Name=*/"__kmpc_reduce_nowait"); + break; + } + case OMPRTL__kmpc_end_reduce: { + // Build void __kmpc_end_reduce(ident_t *loc, kmp_int32 global_tid, + // kmp_critical_name *lck); + 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, /*Name=*/"__kmpc_end_reduce"); + break; + } + case OMPRTL__kmpc_end_reduce_nowait: { + // Build __kmpc_end_reduce_nowait(ident_t *loc, kmp_int32 global_tid, + // kmp_critical_name *lck); + 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, /*Name=*/"__kmpc_end_reduce_nowait"); + break; + } + case OMPRTL__kmpc_omp_task_begin_if0: { + // Build void __kmpc_omp_task(ident_t *, kmp_int32 gtid, kmp_task_t + // *new_task); + llvm::Type *TypeParams[] = {getIdentTyPointerTy(), CGM.Int32Ty, + CGM.VoidPtrTy}; + llvm::FunctionType *FnTy = + llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg=*/false); + RTLFn = + CGM.CreateRuntimeFunction(FnTy, /*Name=*/"__kmpc_omp_task_begin_if0"); + break; + } + case OMPRTL__kmpc_omp_task_complete_if0: { + // Build void __kmpc_omp_task(ident_t *, kmp_int32 gtid, kmp_task_t + // *new_task); + llvm::Type *TypeParams[] = {getIdentTyPointerTy(), CGM.Int32Ty, + CGM.VoidPtrTy}; + llvm::FunctionType *FnTy = + llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg=*/false); + RTLFn = CGM.CreateRuntimeFunction(FnTy, + /*Name=*/"__kmpc_omp_task_complete_if0"); + break; + } + case OMPRTL__kmpc_ordered: { + // Build void __kmpc_ordered(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_ordered"); + break; + } + case OMPRTL__kmpc_end_ordered: { + // Build void __kmpc_ordered(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_ordered"); + break; + } + case OMPRTL__kmpc_omp_taskwait: { + // Build kmp_int32 __kmpc_omp_taskwait(ident_t *loc, kmp_int32 global_tid); + llvm::Type *TypeParams[] = {getIdentTyPointerTy(), CGM.Int32Ty}; + llvm::FunctionType *FnTy = + llvm::FunctionType::get(CGM.Int32Ty, TypeParams, /*isVarArg=*/false); + RTLFn = CGM.CreateRuntimeFunction(FnTy, "__kmpc_omp_taskwait"); + break; + } } return RTLFn; } +llvm::Constant *CGOpenMPRuntime::createForStaticInitFunction(unsigned IVSize, + bool IVSigned) { + assert((IVSize == 32 || IVSize == 64) && + "IV size is not compatible with the omp runtime"); + auto Name = IVSize == 32 ? (IVSigned ? "__kmpc_for_static_init_4" + : "__kmpc_for_static_init_4u") + : (IVSigned ? "__kmpc_for_static_init_8" + : "__kmpc_for_static_init_8u"); + auto ITy = IVSize == 32 ? CGM.Int32Ty : CGM.Int64Ty; + auto PtrTy = llvm::PointerType::getUnqual(ITy); + llvm::Type *TypeParams[] = { + getIdentTyPointerTy(), // loc + CGM.Int32Ty, // tid + CGM.Int32Ty, // schedtype + llvm::PointerType::getUnqual(CGM.Int32Ty), // p_lastiter + PtrTy, // p_lower + PtrTy, // p_upper + PtrTy, // p_stride + ITy, // incr + ITy // chunk + }; + llvm::FunctionType *FnTy = + llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ false); + return CGM.CreateRuntimeFunction(FnTy, Name); +} + +llvm::Constant *CGOpenMPRuntime::createDispatchInitFunction(unsigned IVSize, + bool IVSigned) { + assert((IVSize == 32 || IVSize == 64) && + "IV size is not compatible with the omp runtime"); + auto Name = + IVSize == 32 + ? (IVSigned ? "__kmpc_dispatch_init_4" : "__kmpc_dispatch_init_4u") + : (IVSigned ? "__kmpc_dispatch_init_8" : "__kmpc_dispatch_init_8u"); + auto ITy = IVSize == 32 ? CGM.Int32Ty : CGM.Int64Ty; + llvm::Type *TypeParams[] = { getIdentTyPointerTy(), // loc + CGM.Int32Ty, // tid + CGM.Int32Ty, // schedtype + ITy, // lower + ITy, // upper + ITy, // stride + ITy // chunk + }; + llvm::FunctionType *FnTy = + llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ false); + return CGM.CreateRuntimeFunction(FnTy, Name); +} + +llvm::Constant *CGOpenMPRuntime::createDispatchFiniFunction(unsigned IVSize, + bool IVSigned) { + assert((IVSize == 32 || IVSize == 64) && + "IV size is not compatible with the omp runtime"); + auto Name = + IVSize == 32 + ? (IVSigned ? "__kmpc_dispatch_fini_4" : "__kmpc_dispatch_fini_4u") + : (IVSigned ? "__kmpc_dispatch_fini_8" : "__kmpc_dispatch_fini_8u"); + llvm::Type *TypeParams[] = { + getIdentTyPointerTy(), // loc + CGM.Int32Ty, // tid + }; + llvm::FunctionType *FnTy = + llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg=*/false); + return CGM.CreateRuntimeFunction(FnTy, Name); +} + +llvm::Constant *CGOpenMPRuntime::createDispatchNextFunction(unsigned IVSize, + bool IVSigned) { + assert((IVSize == 32 || IVSize == 64) && + "IV size is not compatible with the omp runtime"); + auto Name = + IVSize == 32 + ? (IVSigned ? "__kmpc_dispatch_next_4" : "__kmpc_dispatch_next_4u") + : (IVSigned ? "__kmpc_dispatch_next_8" : "__kmpc_dispatch_next_8u"); + auto ITy = IVSize == 32 ? CGM.Int32Ty : CGM.Int64Ty; + auto PtrTy = llvm::PointerType::getUnqual(ITy); + llvm::Type *TypeParams[] = { + getIdentTyPointerTy(), // loc + CGM.Int32Ty, // tid + llvm::PointerType::getUnqual(CGM.Int32Ty), // p_lastiter + PtrTy, // p_lower + PtrTy, // p_upper + PtrTy // p_stride + }; + llvm::FunctionType *FnTy = + llvm::FunctionType::get(CGM.Int32Ty, TypeParams, /*isVarArg*/ false); + return CGM.CreateRuntimeFunction(FnTy, Name); +} + llvm::Constant * CGOpenMPRuntime::getOrCreateThreadPrivateCache(const VarDecl *VD) { // Lookup the entry, lazily creating it if necessary. - return GetOrCreateInternalVariable(CGM.Int8PtrPtrTy, + return getOrCreateInternalVariable(CGM.Int8PtrPtrTy, Twine(CGM.getMangledName(VD)) + ".cache."); } -llvm::Value *CGOpenMPRuntime::getOMPAddrOfThreadPrivate(CodeGenFunction &CGF, - const VarDecl *VD, - llvm::Value *VDAddr, - SourceLocation Loc) { +llvm::Value *CGOpenMPRuntime::getAddrOfThreadPrivate(CodeGenFunction &CGF, + const VarDecl *VD, + llvm::Value *VDAddr, + SourceLocation Loc) { auto VarTy = VDAddr->getType()->getPointerElementType(); - llvm::Value *Args[] = {EmitOpenMPUpdateLocation(CGF, Loc), - GetOpenMPThreadID(CGF, Loc), + llvm::Value *Args[] = {emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc), CGF.Builder.CreatePointerCast(VDAddr, CGM.Int8PtrTy), CGM.getSize(CGM.GetTargetTypeStoreSize(VarTy)), getOrCreateThreadPrivateCache(VD)}; return CGF.EmitRuntimeCall( - CreateRuntimeFunction(OMPRTL__kmpc_threadprivate_cached), Args); + createRuntimeFunction(OMPRTL__kmpc_threadprivate_cached), Args); } -void CGOpenMPRuntime::EmitOMPThreadPrivateVarInit( +void CGOpenMPRuntime::emitThreadPrivateVarInit( 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), + auto OMPLoc = emitUpdateLocation(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. @@ -514,10 +882,10 @@ void CGOpenMPRuntime::EmitOMPThreadPrivateVarInit( CGF.Builder.CreatePointerCast(VDAddr, CGM.VoidPtrTy), Ctor, CopyCtor, Dtor}; CGF.EmitRuntimeCall( - CreateRuntimeFunction(OMPRTL__kmpc_threadprivate_register), Args); + createRuntimeFunction(OMPRTL__kmpc_threadprivate_register), Args); } -llvm::Function *CGOpenMPRuntime::EmitOMPThreadPrivateVarDefinition( +llvm::Function *CGOpenMPRuntime::emitThreadPrivateVarDefinition( const VarDecl *VD, llvm::Value *VDAddr, SourceLocation Loc, bool PerformInit, CodeGenFunction *CGF) { VD = VD->getDefinition(CGM.getContext()); @@ -620,54 +988,121 @@ llvm::Function *CGOpenMPRuntime::EmitOMPThreadPrivateVarDefinition( InitCGF.StartFunction(GlobalDecl(), CGM.getContext().VoidTy, InitFunction, CGM.getTypes().arrangeNullaryFunction(), ArgList, Loc); - EmitOMPThreadPrivateVarInit(InitCGF, VDAddr, Ctor, CopyCtor, Dtor, Loc); + emitThreadPrivateVarInit(InitCGF, VDAddr, Ctor, CopyCtor, Dtor, Loc); InitCGF.FinishFunction(); return InitFunction; } - EmitOMPThreadPrivateVarInit(*CGF, VDAddr, Ctor, CopyCtor, Dtor, Loc); + emitThreadPrivateVarInit(*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(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(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); +/// \brief Emits code for OpenMP 'if' clause using specified \a CodeGen +/// function. Here is the logic: +/// if (Cond) { +/// ThenGen(); +/// } else { +/// ElseGen(); +/// } +static void emitOMPIfClause(CodeGenFunction &CGF, const Expr *Cond, + const RegionCodeGenTy &ThenGen, + const RegionCodeGenTy &ElseGen) { + CodeGenFunction::LexicalScope ConditionScope(CGF, Cond->getSourceRange()); + + // If the condition constant folds and can be elided, try to avoid emitting + // the condition and the dead arm of the if/else. + bool CondConstant; + if (CGF.ConstantFoldsToSimpleInteger(Cond, CondConstant)) { + CodeGenFunction::RunCleanupsScope Scope(CGF); + if (CondConstant) { + ThenGen(CGF); + } else { + ElseGen(CGF); + } + return; + } + + // Otherwise, the condition did not fold, or we couldn't elide it. Just + // emit the conditional branch. + auto ThenBlock = CGF.createBasicBlock("omp_if.then"); + auto ElseBlock = CGF.createBasicBlock("omp_if.else"); + auto ContBlock = CGF.createBasicBlock("omp_if.end"); + CGF.EmitBranchOnBoolExpr(Cond, ThenBlock, ElseBlock, /*TrueCount=*/0); - // __kmpc_end_serialized_parallel(&Loc, GTid); - llvm::Value *EndSerArgs[] = {EmitOpenMPUpdateLocation(CGF, Loc), ThreadID}; - RTLFn = CreateRuntimeFunction(OMPRTL__kmpc_end_serialized_parallel); - CGF.EmitRuntimeCall(RTLFn, EndSerArgs); + // Emit the 'then' code. + CGF.EmitBlock(ThenBlock); + { + CodeGenFunction::RunCleanupsScope ThenScope(CGF); + ThenGen(CGF); + } + CGF.EmitBranch(ContBlock); + // Emit the 'else' code if present. + { + // There is no need to emit line number for unconditional branch. + auto NL = ApplyDebugLocation::CreateEmpty(CGF); + CGF.EmitBlock(ElseBlock); + } + { + CodeGenFunction::RunCleanupsScope ThenScope(CGF); + ElseGen(CGF); + } + { + // There is no need to emit line number for unconditional branch. + auto NL = ApplyDebugLocation::CreateEmpty(CGF); + CGF.EmitBranch(ContBlock); + } + // Emit the continuation block for code after the if. + CGF.EmitBlock(ContBlock, /*IsFinished=*/true); +} + +void CGOpenMPRuntime::emitParallelCall(CodeGenFunction &CGF, SourceLocation Loc, + llvm::Value *OutlinedFn, + llvm::Value *CapturedStruct, + const Expr *IfCond) { + auto *RTLoc = emitUpdateLocation(CGF, Loc); + auto &&ThenGen = + [this, OutlinedFn, CapturedStruct, RTLoc](CodeGenFunction &CGF) { + // Build call __kmpc_fork_call(loc, 1, microtask, + // captured_struct/*context*/) + llvm::Value *Args[] = { + RTLoc, + 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(OMPRTL__kmpc_fork_call); + CGF.EmitRuntimeCall(RTLFn, Args); + }; + auto &&ElseGen = [this, OutlinedFn, CapturedStruct, RTLoc, Loc]( + CodeGenFunction &CGF) { + auto ThreadID = getThreadID(CGF, Loc); + // Build calls: + // __kmpc_serialized_parallel(&Loc, GTid); + llvm::Value *Args[] = {RTLoc, ThreadID}; + CGF.EmitRuntimeCall(createRuntimeFunction(OMPRTL__kmpc_serialized_parallel), + Args); + + // 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 *EndArgs[] = {emitUpdateLocation(CGF, Loc), ThreadID}; + CGF.EmitRuntimeCall( + createRuntimeFunction(OMPRTL__kmpc_end_serialized_parallel), EndArgs); + }; + if (IfCond) { + emitOMPIfClause(CGF, IfCond, ThenGen, ElseGen); + } else { + CodeGenFunction::RunCleanupsScope Scope(CGF); + ThenGen(CGF); + } } // If we're inside an (outlined) parallel region, use the region info's @@ -676,13 +1111,14 @@ void CGOpenMPRuntime::EmitOMPSerialCall(CodeGenFunction &CGF, // 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, +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); + if (OMPRegionInfo->getThreadIDVariable()) + return OMPRegionInfo->getThreadIDVariableLValue(CGF).getAddress(); + + auto ThreadID = getThreadID(CGF, Loc); auto Int32Ty = CGF.getContext().getIntTypeForBitwidth(/*DestWidth*/ 32, /*Signed*/ true); auto ThreadIDTemp = CGF.CreateMemTemp(Int32Ty, /*Name*/ ".threadid_temp."); @@ -693,7 +1129,7 @@ llvm::Value *CGOpenMPRuntime::EmitThreadIDAddress(CodeGenFunction &CGF, } llvm::Constant * -CGOpenMPRuntime::GetOrCreateInternalVariable(llvm::Type *Ty, +CGOpenMPRuntime::getOrCreateInternalVariable(llvm::Type *Ty, const llvm::Twine &Name) { SmallString<256> Buffer; llvm::raw_svector_ostream Out(Buffer); @@ -712,31 +1148,51 @@ CGOpenMPRuntime::GetOrCreateInternalVariable(llvm::Type *Ty, Elem.first()); } -llvm::Value *CGOpenMPRuntime::GetCriticalRegionLock(StringRef CriticalName) { +llvm::Value *CGOpenMPRuntime::getCriticalRegionLock(StringRef CriticalName) { llvm::Twine Name(".gomp_critical_user_", CriticalName); - return GetOrCreateInternalVariable(KmpCriticalNameTy, Name.concat(".var")); + return getOrCreateInternalVariable(KmpCriticalNameTy, Name.concat(".var")); } -void CGOpenMPRuntime::EmitOMPCriticalRegion( - CodeGenFunction &CGF, StringRef CriticalName, - const std::function<void()> &CriticalOpGen, SourceLocation Loc) { - auto RegionLock = GetCriticalRegionLock(CriticalName); +namespace { +template <size_t N> class CallEndCleanup : public EHScopeStack::Cleanup { + llvm::Value *Callee; + llvm::Value *Args[N]; + +public: + CallEndCleanup(llvm::Value *Callee, ArrayRef<llvm::Value *> CleanupArgs) + : Callee(Callee) { + assert(CleanupArgs.size() == N); + std::copy(CleanupArgs.begin(), CleanupArgs.end(), std::begin(Args)); + } + void Emit(CodeGenFunction &CGF, Flags /*flags*/) override { + CGF.EmitRuntimeCall(Callee, Args); + } +}; +} // namespace + +void CGOpenMPRuntime::emitCriticalRegion(CodeGenFunction &CGF, + StringRef CriticalName, + const RegionCodeGenTy &CriticalOpGen, + SourceLocation Loc) { // __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(OMPRTL__kmpc_critical); - CGF.EmitRuntimeCall(RTLFn, Args); - CriticalOpGen(); - // Build a call to __kmpc_end_critical - RTLFn = CreateRuntimeFunction(OMPRTL__kmpc_end_critical); - CGF.EmitRuntimeCall(RTLFn, Args); -} - -static void EmitOMPIfStmt(CodeGenFunction &CGF, llvm::Value *IfCond, - const std::function<void()> &BodyOpGen) { + { + CodeGenFunction::RunCleanupsScope Scope(CGF); + llvm::Value *Args[] = {emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc), + getCriticalRegionLock(CriticalName)}; + CGF.EmitRuntimeCall(createRuntimeFunction(OMPRTL__kmpc_critical), Args); + // Build a call to __kmpc_end_critical + CGF.EHStack.pushCleanup<CallEndCleanup<std::extent<decltype(Args)>::value>>( + NormalAndEHCleanup, createRuntimeFunction(OMPRTL__kmpc_end_critical), + llvm::makeArrayRef(Args)); + emitInlinedDirective(CGF, CriticalOpGen); + } +} + +static void emitIfStmt(CodeGenFunction &CGF, llvm::Value *IfCond, + const RegionCodeGenTy &BodyOpGen) { llvm::Value *CallBool = CGF.EmitScalarConversion( IfCond, CGF.getContext().getIntTypeForBitwidth(/*DestWidth=*/32, /*Signed=*/true), @@ -747,61 +1203,234 @@ static void EmitOMPIfStmt(CodeGenFunction &CGF, llvm::Value *IfCond, // Generate the branch (If-stmt) CGF.Builder.CreateCondBr(CallBool, ThenBlock, ContBlock); CGF.EmitBlock(ThenBlock); - BodyOpGen(); + CGF.CGM.getOpenMPRuntime().emitInlinedDirective(CGF, BodyOpGen); // Emit the rest of bblocks/branches CGF.EmitBranch(ContBlock); CGF.EmitBlock(ContBlock, true); } -void CGOpenMPRuntime::EmitOMPMasterRegion( - CodeGenFunction &CGF, const std::function<void()> &MasterOpGen, - SourceLocation Loc) { +void CGOpenMPRuntime::emitMasterRegion(CodeGenFunction &CGF, + const RegionCodeGenTy &MasterOpGen, + SourceLocation Loc) { // if(__kmpc_master(ident_t *, gtid)) { // MasterOpGen(); // __kmpc_end_master(ident_t *, gtid); // } // Prepare arguments and build a call to __kmpc_master - llvm::Value *Args[] = {EmitOpenMPUpdateLocation(CGF, Loc), - GetOpenMPThreadID(CGF, Loc)}; - auto RTLFn = CreateRuntimeFunction(OMPRTL__kmpc_master); - auto *IsMaster = CGF.EmitRuntimeCall(RTLFn, Args); - EmitOMPIfStmt(CGF, IsMaster, [&]() -> void { - MasterOpGen(); - // Build a call to __kmpc_end_master. - // OpenMP [1.2.2 OpenMP Language Terminology] - // For C/C++, an executable statement, possibly compound, with a single - // entry at the top and a single exit at the bottom, or an OpenMP construct. - // * Access to the structured block must not be the result of a branch. - // * The point of exit cannot be a branch out of the structured block. - // * The point of entry must not be a call to setjmp(). - // * longjmp() and throw() must not violate the entry/exit criteria. - // * An expression statement, iteration statement, selection statement, or - // try block is considered to be a structured block if the corresponding - // compound statement obtained by enclosing it in { and } would be a - // structured block. - // It is analyzed in Sema, so we can just call __kmpc_end_master() on - // fallthrough rather than pushing a normal cleanup for it. - RTLFn = CreateRuntimeFunction(OMPRTL__kmpc_end_master); - CGF.EmitRuntimeCall(RTLFn, Args); + llvm::Value *Args[] = {emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc)}; + auto *IsMaster = + CGF.EmitRuntimeCall(createRuntimeFunction(OMPRTL__kmpc_master), Args); + typedef CallEndCleanup<std::extent<decltype(Args)>::value> + MasterCallEndCleanup; + emitIfStmt(CGF, IsMaster, [&](CodeGenFunction &CGF) -> void { + CodeGenFunction::RunCleanupsScope Scope(CGF); + CGF.EHStack.pushCleanup<MasterCallEndCleanup>( + NormalAndEHCleanup, createRuntimeFunction(OMPRTL__kmpc_end_master), + llvm::makeArrayRef(Args)); + MasterOpGen(CGF); }); } -void CGOpenMPRuntime::EmitOMPBarrierCall(CodeGenFunction &CGF, - SourceLocation Loc, bool IsExplicit) { +void CGOpenMPRuntime::emitTaskyieldCall(CodeGenFunction &CGF, + SourceLocation Loc) { + // Build call __kmpc_omp_taskyield(loc, thread_id, 0); + llvm::Value *Args[] = { + emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc), + llvm::ConstantInt::get(CGM.IntTy, /*V=*/0, /*isSigned=*/true)}; + CGF.EmitRuntimeCall(createRuntimeFunction(OMPRTL__kmpc_omp_taskyield), Args); +} + +static llvm::Value *emitCopyprivateCopyFunction( + CodeGenModule &CGM, llvm::Type *ArgsType, + ArrayRef<const Expr *> CopyprivateVars, ArrayRef<const Expr *> DestExprs, + ArrayRef<const Expr *> SrcExprs, ArrayRef<const Expr *> AssignmentOps) { + auto &C = CGM.getContext(); + // void copy_func(void *LHSArg, void *RHSArg); + FunctionArgList Args; + ImplicitParamDecl LHSArg(C, /*DC=*/nullptr, SourceLocation(), /*Id=*/nullptr, + C.VoidPtrTy); + ImplicitParamDecl RHSArg(C, /*DC=*/nullptr, SourceLocation(), /*Id=*/nullptr, + C.VoidPtrTy); + Args.push_back(&LHSArg); + Args.push_back(&RHSArg); + FunctionType::ExtInfo EI; + auto &CGFI = CGM.getTypes().arrangeFreeFunctionDeclaration( + C.VoidTy, Args, EI, /*isVariadic=*/false); + auto *Fn = llvm::Function::Create( + CGM.getTypes().GetFunctionType(CGFI), llvm::GlobalValue::InternalLinkage, + ".omp.copyprivate.copy_func", &CGM.getModule()); + CGM.SetLLVMFunctionAttributes(/*D=*/nullptr, CGFI, Fn); + CodeGenFunction CGF(CGM); + CGF.StartFunction(GlobalDecl(), C.VoidTy, Fn, CGFI, Args); + // Dest = (void*[n])(LHSArg); + // Src = (void*[n])(RHSArg); + auto *LHS = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( + CGF.Builder.CreateAlignedLoad(CGF.GetAddrOfLocalVar(&LHSArg), + CGF.PointerAlignInBytes), + ArgsType); + auto *RHS = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( + CGF.Builder.CreateAlignedLoad(CGF.GetAddrOfLocalVar(&RHSArg), + CGF.PointerAlignInBytes), + ArgsType); + // *(Type0*)Dst[0] = *(Type0*)Src[0]; + // *(Type1*)Dst[1] = *(Type1*)Src[1]; + // ... + // *(Typen*)Dst[n] = *(Typen*)Src[n]; + for (unsigned I = 0, E = AssignmentOps.size(); I < E; ++I) { + auto *DestAddr = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( + CGF.Builder.CreateAlignedLoad( + CGF.Builder.CreateStructGEP(nullptr, LHS, I), + CGM.PointerAlignInBytes), + CGF.ConvertTypeForMem(C.getPointerType(SrcExprs[I]->getType()))); + auto *SrcAddr = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( + CGF.Builder.CreateAlignedLoad( + CGF.Builder.CreateStructGEP(nullptr, RHS, I), + CGM.PointerAlignInBytes), + CGF.ConvertTypeForMem(C.getPointerType(SrcExprs[I]->getType()))); + auto *VD = cast<DeclRefExpr>(CopyprivateVars[I])->getDecl(); + QualType Type = VD->getType(); + CGF.EmitOMPCopy(CGF, Type, DestAddr, SrcAddr, + cast<VarDecl>(cast<DeclRefExpr>(DestExprs[I])->getDecl()), + cast<VarDecl>(cast<DeclRefExpr>(SrcExprs[I])->getDecl()), + AssignmentOps[I]); + } + CGF.FinishFunction(); + return Fn; +} + +void CGOpenMPRuntime::emitSingleRegion(CodeGenFunction &CGF, + const RegionCodeGenTy &SingleOpGen, + SourceLocation Loc, + ArrayRef<const Expr *> CopyprivateVars, + ArrayRef<const Expr *> SrcExprs, + ArrayRef<const Expr *> DstExprs, + ArrayRef<const Expr *> AssignmentOps) { + assert(CopyprivateVars.size() == SrcExprs.size() && + CopyprivateVars.size() == DstExprs.size() && + CopyprivateVars.size() == AssignmentOps.size()); + auto &C = CGM.getContext(); + // int32 did_it = 0; + // if(__kmpc_single(ident_t *, gtid)) { + // SingleOpGen(); + // __kmpc_end_single(ident_t *, gtid); + // did_it = 1; + // } + // call __kmpc_copyprivate(ident_t *, gtid, <buf_size>, <copyprivate list>, + // <copy_func>, did_it); + + llvm::AllocaInst *DidIt = nullptr; + if (!CopyprivateVars.empty()) { + // int32 did_it = 0; + auto KmpInt32Ty = C.getIntTypeForBitwidth(/*DestWidth=*/32, /*Signed=*/1); + DidIt = CGF.CreateMemTemp(KmpInt32Ty, ".omp.copyprivate.did_it"); + CGF.Builder.CreateAlignedStore(CGF.Builder.getInt32(0), DidIt, + DidIt->getAlignment()); + } + // Prepare arguments and build a call to __kmpc_single + llvm::Value *Args[] = {emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc)}; + auto *IsSingle = + CGF.EmitRuntimeCall(createRuntimeFunction(OMPRTL__kmpc_single), Args); + typedef CallEndCleanup<std::extent<decltype(Args)>::value> + SingleCallEndCleanup; + emitIfStmt(CGF, IsSingle, [&](CodeGenFunction &CGF) -> void { + CodeGenFunction::RunCleanupsScope Scope(CGF); + CGF.EHStack.pushCleanup<SingleCallEndCleanup>( + NormalAndEHCleanup, createRuntimeFunction(OMPRTL__kmpc_end_single), + llvm::makeArrayRef(Args)); + SingleOpGen(CGF); + if (DidIt) { + // did_it = 1; + CGF.Builder.CreateAlignedStore(CGF.Builder.getInt32(1), DidIt, + DidIt->getAlignment()); + } + }); + // call __kmpc_copyprivate(ident_t *, gtid, <buf_size>, <copyprivate list>, + // <copy_func>, did_it); + if (DidIt) { + llvm::APInt ArraySize(/*unsigned int numBits=*/32, CopyprivateVars.size()); + auto CopyprivateArrayTy = + C.getConstantArrayType(C.VoidPtrTy, ArraySize, ArrayType::Normal, + /*IndexTypeQuals=*/0); + // Create a list of all private variables for copyprivate. + auto *CopyprivateList = + CGF.CreateMemTemp(CopyprivateArrayTy, ".omp.copyprivate.cpr_list"); + for (unsigned I = 0, E = CopyprivateVars.size(); I < E; ++I) { + auto *Elem = CGF.Builder.CreateStructGEP( + CopyprivateList->getAllocatedType(), CopyprivateList, I); + CGF.Builder.CreateAlignedStore( + CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( + CGF.EmitLValue(CopyprivateVars[I]).getAddress(), CGF.VoidPtrTy), + Elem, CGM.PointerAlignInBytes); + } + // Build function that copies private values from single region to all other + // threads in the corresponding parallel region. + auto *CpyFn = emitCopyprivateCopyFunction( + CGM, CGF.ConvertTypeForMem(CopyprivateArrayTy)->getPointerTo(), + CopyprivateVars, SrcExprs, DstExprs, AssignmentOps); + auto *BufSize = llvm::ConstantInt::get( + CGM.SizeTy, C.getTypeSizeInChars(CopyprivateArrayTy).getQuantity()); + auto *CL = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(CopyprivateList, + CGF.VoidPtrTy); + auto *DidItVal = + CGF.Builder.CreateAlignedLoad(DidIt, CGF.PointerAlignInBytes); + llvm::Value *Args[] = { + emitUpdateLocation(CGF, Loc), // ident_t *<loc> + getThreadID(CGF, Loc), // i32 <gtid> + BufSize, // size_t <buf_size> + CL, // void *<copyprivate list> + CpyFn, // void (*) (void *, void *) <copy_func> + DidItVal // i32 did_it + }; + CGF.EmitRuntimeCall(createRuntimeFunction(OMPRTL__kmpc_copyprivate), Args); + } +} + +void CGOpenMPRuntime::emitOrderedRegion(CodeGenFunction &CGF, + const RegionCodeGenTy &OrderedOpGen, + SourceLocation Loc) { + // __kmpc_ordered(ident_t *, gtid); + // OrderedOpGen(); + // __kmpc_end_ordered(ident_t *, gtid); + // Prepare arguments and build a call to __kmpc_ordered + { + CodeGenFunction::RunCleanupsScope Scope(CGF); + llvm::Value *Args[] = {emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc)}; + CGF.EmitRuntimeCall(createRuntimeFunction(OMPRTL__kmpc_ordered), Args); + // Build a call to __kmpc_end_ordered + CGF.EHStack.pushCleanup<CallEndCleanup<std::extent<decltype(Args)>::value>>( + NormalAndEHCleanup, createRuntimeFunction(OMPRTL__kmpc_end_ordered), + llvm::makeArrayRef(Args)); + emitInlinedDirective(CGF, OrderedOpGen); + } +} + +void CGOpenMPRuntime::emitBarrierCall(CodeGenFunction &CGF, SourceLocation Loc, + OpenMPDirectiveKind Kind) { // Build call __kmpc_cancel_barrier(loc, thread_id); - auto Flags = static_cast<OpenMPLocationFlags>( - OMP_IDENT_KMPC | - (IsExplicit ? OMP_IDENT_BARRIER_EXPL : OMP_IDENT_BARRIER_IMPL)); + OpenMPLocationFlags Flags = OMP_IDENT_KMPC; + if (Kind == OMPD_for) { + Flags = + static_cast<OpenMPLocationFlags>(Flags | OMP_IDENT_BARRIER_IMPL_FOR); + } else if (Kind == OMPD_sections) { + Flags = static_cast<OpenMPLocationFlags>(Flags | + OMP_IDENT_BARRIER_IMPL_SECTIONS); + } else if (Kind == OMPD_single) { + Flags = + static_cast<OpenMPLocationFlags>(Flags | OMP_IDENT_BARRIER_IMPL_SINGLE); + } else if (Kind == OMPD_barrier) { + Flags = static_cast<OpenMPLocationFlags>(Flags | OMP_IDENT_BARRIER_EXPL); + } else { + Flags = static_cast<OpenMPLocationFlags>(Flags | OMP_IDENT_BARRIER_IMPL); + } // Build call __kmpc_cancel_barrier(loc, thread_id); // Replace __kmpc_barrier() function by __kmpc_cancel_barrier() because this // one provides the same functionality and adds initial support for // cancellation constructs introduced in OpenMP 4.0. __kmpc_cancel_barrier() // is provided default by the runtime library so it safe to make such // replacement. - llvm::Value *Args[] = {EmitOpenMPUpdateLocation(CGF, Loc, Flags), - GetOpenMPThreadID(CGF, Loc)}; - auto RTLFn = CreateRuntimeFunction(OMPRTL__kmpc_cancel_barrier); - CGF.EmitRuntimeCall(RTLFn, Args); + llvm::Value *Args[] = {emitUpdateLocation(CGF, Loc, Flags), + getThreadID(CGF, Loc)}; + CGF.EmitRuntimeCall(createRuntimeFunction(OMPRTL__kmpc_cancel_barrier), Args); } /// \brief Schedule types for 'omp for' loops (these enumerators are taken from @@ -817,106 +1446,1017 @@ enum OpenMPSchedType { OMP_sch_auto = 38, /// \brief Lower bound for 'ordered' versions. OMP_ord_lower = 64, - /// \brief Lower bound for 'nomerge' versions. - OMP_nm_lower = 160, + OMP_ord_static_chunked = 65, + OMP_ord_static = 66, + OMP_ord_dynamic_chunked = 67, + OMP_ord_guided_chunked = 68, + OMP_ord_runtime = 69, + OMP_ord_auto = 70, + OMP_sch_default = OMP_sch_static, }; /// \brief Map the OpenMP loop schedule to the runtime enumeration. static OpenMPSchedType getRuntimeSchedule(OpenMPScheduleClauseKind ScheduleKind, - bool Chunked) { + bool Chunked, bool Ordered) { switch (ScheduleKind) { case OMPC_SCHEDULE_static: - return Chunked ? OMP_sch_static_chunked : OMP_sch_static; + return Chunked ? (Ordered ? OMP_ord_static_chunked : OMP_sch_static_chunked) + : (Ordered ? OMP_ord_static : OMP_sch_static); case OMPC_SCHEDULE_dynamic: - return OMP_sch_dynamic_chunked; + return Ordered ? OMP_ord_dynamic_chunked : OMP_sch_dynamic_chunked; case OMPC_SCHEDULE_guided: - return OMP_sch_guided_chunked; - case OMPC_SCHEDULE_auto: - return OMP_sch_auto; + return Ordered ? OMP_ord_guided_chunked : OMP_sch_guided_chunked; case OMPC_SCHEDULE_runtime: - return OMP_sch_runtime; + return Ordered ? OMP_ord_runtime : OMP_sch_runtime; + case OMPC_SCHEDULE_auto: + return Ordered ? OMP_ord_auto : OMP_sch_auto; case OMPC_SCHEDULE_unknown: assert(!Chunked && "chunk was specified but schedule kind not known"); - return OMP_sch_static; + return Ordered ? OMP_ord_static : OMP_sch_static; } llvm_unreachable("Unexpected runtime schedule"); } bool CGOpenMPRuntime::isStaticNonchunked(OpenMPScheduleClauseKind ScheduleKind, bool Chunked) const { - auto Schedule = getRuntimeSchedule(ScheduleKind, Chunked); + auto Schedule = getRuntimeSchedule(ScheduleKind, Chunked, /*Ordered=*/false); return Schedule == OMP_sch_static; } -void CGOpenMPRuntime::EmitOMPForInit(CodeGenFunction &CGF, SourceLocation Loc, - OpenMPScheduleClauseKind ScheduleKind, - unsigned IVSize, bool IVSigned, - llvm::Value *IL, llvm::Value *LB, - llvm::Value *UB, llvm::Value *ST, - llvm::Value *Chunk) { - OpenMPSchedType Schedule = getRuntimeSchedule(ScheduleKind, Chunk != nullptr); - // Call __kmpc_for_static_init( - // ident_t *loc, kmp_int32 tid, kmp_int32 schedtype, - // kmp_int32 *p_lastiter, kmp_int[32|64] *p_lower, - // kmp_int[32|64] *p_upper, kmp_int[32|64] *p_stride, - // kmp_int[32|64] incr, kmp_int[32|64] chunk); - // TODO: Implement dynamic schedule. - - // If the Chunk was not specified in the clause - use default value 1. - if (Chunk == nullptr) - Chunk = CGF.Builder.getIntN(IVSize, /*C*/ 1); +bool CGOpenMPRuntime::isDynamic(OpenMPScheduleClauseKind ScheduleKind) const { + auto Schedule = + getRuntimeSchedule(ScheduleKind, /*Chunked=*/false, /*Ordered=*/false); + assert(Schedule != OMP_sch_static_chunked && "cannot be chunked here"); + return Schedule != OMP_sch_static; +} + +void CGOpenMPRuntime::emitForInit(CodeGenFunction &CGF, SourceLocation Loc, + OpenMPScheduleClauseKind ScheduleKind, + unsigned IVSize, bool IVSigned, bool Ordered, + llvm::Value *IL, llvm::Value *LB, + llvm::Value *UB, llvm::Value *ST, + llvm::Value *Chunk) { + OpenMPSchedType Schedule = + getRuntimeSchedule(ScheduleKind, Chunk != nullptr, Ordered); + if (Ordered || + (Schedule != OMP_sch_static && Schedule != OMP_sch_static_chunked && + Schedule != OMP_ord_static && Schedule != OMP_ord_static_chunked)) { + // Call __kmpc_dispatch_init( + // ident_t *loc, kmp_int32 tid, kmp_int32 schedule, + // kmp_int[32|64] lower, kmp_int[32|64] upper, + // kmp_int[32|64] stride, kmp_int[32|64] chunk); + + // If the Chunk was not specified in the clause - use default value 1. + if (Chunk == nullptr) + Chunk = CGF.Builder.getIntN(IVSize, 1); + llvm::Value *Args[] = { emitUpdateLocation(CGF, Loc, OMP_IDENT_KMPC), + getThreadID(CGF, Loc), + CGF.Builder.getInt32(Schedule), // Schedule type + CGF.Builder.getIntN(IVSize, 0), // Lower + UB, // Upper + CGF.Builder.getIntN(IVSize, 1), // Stride + Chunk // Chunk + }; + CGF.EmitRuntimeCall(createDispatchInitFunction(IVSize, IVSigned), Args); + } else { + // Call __kmpc_for_static_init( + // ident_t *loc, kmp_int32 tid, kmp_int32 schedtype, + // kmp_int32 *p_lastiter, kmp_int[32|64] *p_lower, + // kmp_int[32|64] *p_upper, kmp_int[32|64] *p_stride, + // kmp_int[32|64] incr, kmp_int[32|64] chunk); + if (Chunk == nullptr) { + assert((Schedule == OMP_sch_static || Schedule == OMP_ord_static) && + "expected static non-chunked schedule"); + // If the Chunk was not specified in the clause - use default value 1. + Chunk = CGF.Builder.getIntN(IVSize, 1); + } else + assert((Schedule == OMP_sch_static_chunked || + Schedule == OMP_ord_static_chunked) && + "expected static chunked schedule"); + llvm::Value *Args[] = { emitUpdateLocation(CGF, Loc, OMP_IDENT_KMPC), + getThreadID(CGF, Loc), + CGF.Builder.getInt32(Schedule), // Schedule type + IL, // &isLastIter + LB, // &LB + UB, // &UB + ST, // &Stride + CGF.Builder.getIntN(IVSize, 1), // Incr + Chunk // Chunk + }; + CGF.EmitRuntimeCall(createForStaticInitFunction(IVSize, IVSigned), Args); + } +} +void CGOpenMPRuntime::emitForStaticFinish(CodeGenFunction &CGF, + SourceLocation Loc) { + // Call __kmpc_for_static_fini(ident_t *loc, kmp_int32 tid); + llvm::Value *Args[] = {emitUpdateLocation(CGF, Loc, OMP_IDENT_KMPC), + getThreadID(CGF, Loc)}; + CGF.EmitRuntimeCall(createRuntimeFunction(OMPRTL__kmpc_for_static_fini), + Args); +} + +void CGOpenMPRuntime::emitForOrderedIterationEnd(CodeGenFunction &CGF, + SourceLocation Loc, + unsigned IVSize, + bool IVSigned) { + // Call __kmpc_for_dynamic_fini_(4|8)[u](ident_t *loc, kmp_int32 tid); + llvm::Value *Args[] = {emitUpdateLocation(CGF, Loc, OMP_IDENT_KMPC), + getThreadID(CGF, Loc)}; + CGF.EmitRuntimeCall(createDispatchFiniFunction(IVSize, IVSigned), Args); +} + +llvm::Value *CGOpenMPRuntime::emitForNext(CodeGenFunction &CGF, + SourceLocation Loc, unsigned IVSize, + bool IVSigned, llvm::Value *IL, + llvm::Value *LB, llvm::Value *UB, + llvm::Value *ST) { + // Call __kmpc_dispatch_next( + // ident_t *loc, kmp_int32 tid, kmp_int32 *p_lastiter, + // kmp_int[32|64] *p_lower, kmp_int[32|64] *p_upper, + // kmp_int[32|64] *p_stride); llvm::Value *Args[] = { - EmitOpenMPUpdateLocation(CGF, Loc, OMP_IDENT_KMPC), - GetOpenMPThreadID(CGF, Loc), - CGF.Builder.getInt32(Schedule), // Schedule type - IL, // &isLastIter - LB, // &LB - UB, // &UB - ST, // &Stride - CGF.Builder.getIntN(IVSize, 1), // Incr - Chunk // Chunk + emitUpdateLocation(CGF, Loc, OMP_IDENT_KMPC), getThreadID(CGF, Loc), + IL, // &isLastIter + LB, // &Lower + UB, // &Upper + ST // &Stride }; - assert((IVSize == 32 || IVSize == 64) && - "Index size is not compatible with the omp runtime"); - auto F = IVSize == 32 ? (IVSigned ? OMPRTL__kmpc_for_static_init_4 - : OMPRTL__kmpc_for_static_init_4u) - : (IVSigned ? OMPRTL__kmpc_for_static_init_8 - : OMPRTL__kmpc_for_static_init_8u); - auto RTLFn = CreateRuntimeFunction(F); - CGF.EmitRuntimeCall(RTLFn, Args); -} - -void CGOpenMPRuntime::EmitOMPForFinish(CodeGenFunction &CGF, SourceLocation Loc, - OpenMPScheduleClauseKind ScheduleKind) { - assert((ScheduleKind == OMPC_SCHEDULE_static || - ScheduleKind == OMPC_SCHEDULE_unknown) && - "Non-static schedule kinds are not yet implemented"); - // Call __kmpc_for_static_fini(ident_t *loc, kmp_int32 tid); - llvm::Value *Args[] = {EmitOpenMPUpdateLocation(CGF, Loc, OMP_IDENT_KMPC), - GetOpenMPThreadID(CGF, Loc)}; - auto RTLFn = CreateRuntimeFunction(OMPRTL__kmpc_for_static_fini); - CGF.EmitRuntimeCall(RTLFn, Args); + llvm::Value *Call = + CGF.EmitRuntimeCall(createDispatchNextFunction(IVSize, IVSigned), Args); + return CGF.EmitScalarConversion( + Call, CGF.getContext().getIntTypeForBitwidth(32, /* Signed */ true), + CGF.getContext().BoolTy); } -void CGOpenMPRuntime::EmitOMPNumThreadsClause(CodeGenFunction &CGF, - llvm::Value *NumThreads, - SourceLocation Loc) { +void CGOpenMPRuntime::emitNumThreadsClause(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), + emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc), CGF.Builder.CreateIntCast(NumThreads, CGF.Int32Ty, /*isSigned*/ true)}; - llvm::Constant *RTLFn = CreateRuntimeFunction(OMPRTL__kmpc_push_num_threads); - CGF.EmitRuntimeCall(RTLFn, Args); + CGF.EmitRuntimeCall(createRuntimeFunction(OMPRTL__kmpc_push_num_threads), + Args); +} + +void CGOpenMPRuntime::emitFlush(CodeGenFunction &CGF, ArrayRef<const Expr *>, + SourceLocation Loc) { + // Build call void __kmpc_flush(ident_t *loc) + CGF.EmitRuntimeCall(createRuntimeFunction(OMPRTL__kmpc_flush), + emitUpdateLocation(CGF, Loc)); +} + +namespace { +/// \brief Indexes of fields for type kmp_task_t. +enum KmpTaskTFields { + /// \brief List of shared variables. + KmpTaskTShareds, + /// \brief Task routine. + KmpTaskTRoutine, + /// \brief Partition id for the untied tasks. + KmpTaskTPartId, + /// \brief Function with call of destructors for private variables. + KmpTaskTDestructors, +}; +} // namespace + +void CGOpenMPRuntime::emitKmpRoutineEntryT(QualType KmpInt32Ty) { + if (!KmpRoutineEntryPtrTy) { + // Build typedef kmp_int32 (* kmp_routine_entry_t)(kmp_int32, void *); type. + auto &C = CGM.getContext(); + QualType KmpRoutineEntryTyArgs[] = {KmpInt32Ty, C.VoidPtrTy}; + FunctionProtoType::ExtProtoInfo EPI; + KmpRoutineEntryPtrQTy = C.getPointerType( + C.getFunctionType(KmpInt32Ty, KmpRoutineEntryTyArgs, EPI)); + KmpRoutineEntryPtrTy = CGM.getTypes().ConvertType(KmpRoutineEntryPtrQTy); + } +} + +static void addFieldToRecordDecl(ASTContext &C, DeclContext *DC, + QualType FieldTy) { + auto *Field = FieldDecl::Create( + C, DC, SourceLocation(), SourceLocation(), /*Id=*/nullptr, FieldTy, + C.getTrivialTypeSourceInfo(FieldTy, SourceLocation()), + /*BW=*/nullptr, /*Mutable=*/false, /*InitStyle=*/ICIS_NoInit); + Field->setAccess(AS_public); + DC->addDecl(Field); +} + +namespace { +struct PrivateHelpersTy { + PrivateHelpersTy(const VarDecl *Original, const VarDecl *PrivateCopy, + const VarDecl *PrivateElemInit) + : Original(Original), PrivateCopy(PrivateCopy), + PrivateElemInit(PrivateElemInit) {} + const VarDecl *Original; + const VarDecl *PrivateCopy; + const VarDecl *PrivateElemInit; +}; +typedef std::pair<CharUnits /*Align*/, PrivateHelpersTy> PrivateDataTy; +} // namespace + +static RecordDecl * +createPrivatesRecordDecl(CodeGenModule &CGM, + const ArrayRef<PrivateDataTy> Privates) { + if (!Privates.empty()) { + auto &C = CGM.getContext(); + // Build struct .kmp_privates_t. { + // /* private vars */ + // }; + auto *RD = C.buildImplicitRecord(".kmp_privates.t"); + RD->startDefinition(); + for (auto &&Pair : Privates) { + auto Type = Pair.second.Original->getType(); + Type = Type.getNonReferenceType(); + addFieldToRecordDecl(C, RD, Type); + } + RD->completeDefinition(); + return RD; + } + return nullptr; } -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 = CreateRuntimeFunction(OMPRTL__kmpc_flush); - CGF.EmitRuntimeCall(RTLFn, Args); +static RecordDecl * +createKmpTaskTRecordDecl(CodeGenModule &CGM, QualType KmpInt32Ty, + QualType KmpRoutineEntryPointerQTy) { + auto &C = CGM.getContext(); + // Build struct kmp_task_t { + // void * shareds; + // kmp_routine_entry_t routine; + // kmp_int32 part_id; + // kmp_routine_entry_t destructors; + // }; + auto *RD = C.buildImplicitRecord("kmp_task_t"); + RD->startDefinition(); + addFieldToRecordDecl(C, RD, C.VoidPtrTy); + addFieldToRecordDecl(C, RD, KmpRoutineEntryPointerQTy); + addFieldToRecordDecl(C, RD, KmpInt32Ty); + addFieldToRecordDecl(C, RD, KmpRoutineEntryPointerQTy); + RD->completeDefinition(); + return RD; +} + +static RecordDecl * +createKmpTaskTWithPrivatesRecordDecl(CodeGenModule &CGM, QualType KmpTaskTQTy, + const ArrayRef<PrivateDataTy> Privates) { + auto &C = CGM.getContext(); + // Build struct kmp_task_t_with_privates { + // kmp_task_t task_data; + // .kmp_privates_t. privates; + // }; + auto *RD = C.buildImplicitRecord("kmp_task_t_with_privates"); + RD->startDefinition(); + addFieldToRecordDecl(C, RD, KmpTaskTQTy); + if (auto *PrivateRD = createPrivatesRecordDecl(CGM, Privates)) { + addFieldToRecordDecl(C, RD, C.getRecordType(PrivateRD)); + } + RD->completeDefinition(); + return RD; } + +/// \brief Emit a proxy function which accepts kmp_task_t as the second +/// argument. +/// \code +/// kmp_int32 .omp_task_entry.(kmp_int32 gtid, kmp_task_t *tt) { +/// TaskFunction(gtid, tt->part_id, &tt->privates, task_privates_map, +/// tt->shareds); +/// return 0; +/// } +/// \endcode +static llvm::Value * +emitProxyTaskFunction(CodeGenModule &CGM, SourceLocation Loc, + QualType KmpInt32Ty, QualType KmpTaskTWithPrivatesPtrQTy, + QualType KmpTaskTWithPrivatesQTy, QualType KmpTaskTQTy, + QualType SharedsPtrTy, llvm::Value *TaskFunction, + llvm::Value *TaskPrivatesMap) { + auto &C = CGM.getContext(); + FunctionArgList Args; + ImplicitParamDecl GtidArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, KmpInt32Ty); + ImplicitParamDecl TaskTypeArg(C, /*DC=*/nullptr, Loc, + /*Id=*/nullptr, KmpTaskTWithPrivatesPtrQTy); + Args.push_back(&GtidArg); + Args.push_back(&TaskTypeArg); + FunctionType::ExtInfo Info; + auto &TaskEntryFnInfo = + CGM.getTypes().arrangeFreeFunctionDeclaration(KmpInt32Ty, Args, Info, + /*isVariadic=*/false); + auto *TaskEntryTy = CGM.getTypes().GetFunctionType(TaskEntryFnInfo); + auto *TaskEntry = + llvm::Function::Create(TaskEntryTy, llvm::GlobalValue::InternalLinkage, + ".omp_task_entry.", &CGM.getModule()); + CGM.SetLLVMFunctionAttributes(/*D=*/nullptr, TaskEntryFnInfo, TaskEntry); + CodeGenFunction CGF(CGM); + CGF.disableDebugInfo(); + CGF.StartFunction(GlobalDecl(), KmpInt32Ty, TaskEntry, TaskEntryFnInfo, Args); + + // TaskFunction(gtid, tt->task_data.part_id, &tt->privates, task_privates_map, + // tt->task_data.shareds); + auto *GtidParam = CGF.EmitLoadOfScalar( + CGF.GetAddrOfLocalVar(&GtidArg), /*Volatile=*/false, + C.getTypeAlignInChars(KmpInt32Ty).getQuantity(), KmpInt32Ty, Loc); + auto *TaskTypeArgAddr = CGF.Builder.CreateAlignedLoad( + CGF.GetAddrOfLocalVar(&TaskTypeArg), CGM.PointerAlignInBytes); + LValue TDBase = + CGF.MakeNaturalAlignAddrLValue(TaskTypeArgAddr, KmpTaskTWithPrivatesQTy); + auto *KmpTaskTWithPrivatesQTyRD = + cast<RecordDecl>(KmpTaskTWithPrivatesQTy->getAsTagDecl()); + LValue Base = + CGF.EmitLValueForField(TDBase, *KmpTaskTWithPrivatesQTyRD->field_begin()); + auto *KmpTaskTQTyRD = cast<RecordDecl>(KmpTaskTQTy->getAsTagDecl()); + auto PartIdFI = std::next(KmpTaskTQTyRD->field_begin(), KmpTaskTPartId); + auto PartIdLVal = CGF.EmitLValueForField(Base, *PartIdFI); + auto *PartidParam = CGF.EmitLoadOfLValue(PartIdLVal, Loc).getScalarVal(); + + auto SharedsFI = std::next(KmpTaskTQTyRD->field_begin(), KmpTaskTShareds); + auto SharedsLVal = CGF.EmitLValueForField(Base, *SharedsFI); + auto *SharedsParam = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( + CGF.EmitLoadOfLValue(SharedsLVal, Loc).getScalarVal(), + CGF.ConvertTypeForMem(SharedsPtrTy)); + + auto PrivatesFI = std::next(KmpTaskTWithPrivatesQTyRD->field_begin(), 1); + llvm::Value *PrivatesParam; + if (PrivatesFI != KmpTaskTWithPrivatesQTyRD->field_end()) { + auto PrivatesLVal = CGF.EmitLValueForField(TDBase, *PrivatesFI); + PrivatesParam = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( + PrivatesLVal.getAddress(), CGF.VoidPtrTy); + } else { + PrivatesParam = llvm::ConstantPointerNull::get(CGF.VoidPtrTy); + } + + llvm::Value *CallArgs[] = {GtidParam, PartidParam, PrivatesParam, + TaskPrivatesMap, SharedsParam}; + CGF.EmitCallOrInvoke(TaskFunction, CallArgs); + CGF.EmitStoreThroughLValue( + RValue::get(CGF.Builder.getInt32(/*C=*/0)), + CGF.MakeNaturalAlignAddrLValue(CGF.ReturnValue, KmpInt32Ty)); + CGF.FinishFunction(); + return TaskEntry; +} + +static llvm::Value *emitDestructorsFunction(CodeGenModule &CGM, + SourceLocation Loc, + QualType KmpInt32Ty, + QualType KmpTaskTWithPrivatesPtrQTy, + QualType KmpTaskTWithPrivatesQTy) { + auto &C = CGM.getContext(); + FunctionArgList Args; + ImplicitParamDecl GtidArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, KmpInt32Ty); + ImplicitParamDecl TaskTypeArg(C, /*DC=*/nullptr, Loc, + /*Id=*/nullptr, KmpTaskTWithPrivatesPtrQTy); + Args.push_back(&GtidArg); + Args.push_back(&TaskTypeArg); + FunctionType::ExtInfo Info; + auto &DestructorFnInfo = + CGM.getTypes().arrangeFreeFunctionDeclaration(KmpInt32Ty, Args, Info, + /*isVariadic=*/false); + auto *DestructorFnTy = CGM.getTypes().GetFunctionType(DestructorFnInfo); + auto *DestructorFn = + llvm::Function::Create(DestructorFnTy, llvm::GlobalValue::InternalLinkage, + ".omp_task_destructor.", &CGM.getModule()); + CGM.SetLLVMFunctionAttributes(/*D=*/nullptr, DestructorFnInfo, DestructorFn); + CodeGenFunction CGF(CGM); + CGF.disableDebugInfo(); + CGF.StartFunction(GlobalDecl(), KmpInt32Ty, DestructorFn, DestructorFnInfo, + Args); + + auto *TaskTypeArgAddr = CGF.Builder.CreateAlignedLoad( + CGF.GetAddrOfLocalVar(&TaskTypeArg), CGM.PointerAlignInBytes); + LValue Base = + CGF.MakeNaturalAlignAddrLValue(TaskTypeArgAddr, KmpTaskTWithPrivatesQTy); + auto *KmpTaskTWithPrivatesQTyRD = + cast<RecordDecl>(KmpTaskTWithPrivatesQTy->getAsTagDecl()); + auto FI = std::next(KmpTaskTWithPrivatesQTyRD->field_begin()); + Base = CGF.EmitLValueForField(Base, *FI); + for (auto *Field : + cast<RecordDecl>(FI->getType()->getAsTagDecl())->fields()) { + if (auto DtorKind = Field->getType().isDestructedType()) { + auto FieldLValue = CGF.EmitLValueForField(Base, Field); + CGF.pushDestroy(DtorKind, FieldLValue.getAddress(), Field->getType()); + } + } + CGF.FinishFunction(); + return DestructorFn; +} + +/// \brief Emit a privates mapping function for correct handling of private and +/// firstprivate variables. +/// \code +/// void .omp_task_privates_map.(const .privates. *noalias privs, <ty1> +/// **noalias priv1,..., <tyn> **noalias privn) { +/// *priv1 = &.privates.priv1; +/// ...; +/// *privn = &.privates.privn; +/// } +/// \endcode +static llvm::Value * +emitTaskPrivateMappingFunction(CodeGenModule &CGM, SourceLocation Loc, + const ArrayRef<const Expr *> PrivateVars, + const ArrayRef<const Expr *> FirstprivateVars, + QualType PrivatesQTy, + const ArrayRef<PrivateDataTy> Privates) { + auto &C = CGM.getContext(); + FunctionArgList Args; + ImplicitParamDecl TaskPrivatesArg( + C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, + C.getPointerType(PrivatesQTy).withConst().withRestrict()); + Args.push_back(&TaskPrivatesArg); + llvm::DenseMap<const VarDecl *, unsigned> PrivateVarsPos; + unsigned Counter = 1; + for (auto *E: PrivateVars) { + Args.push_back(ImplicitParamDecl::Create( + C, /*DC=*/nullptr, Loc, + /*Id=*/nullptr, C.getPointerType(C.getPointerType(E->getType())) + .withConst() + .withRestrict())); + auto *VD = cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl()); + PrivateVarsPos[VD] = Counter; + ++Counter; + } + for (auto *E : FirstprivateVars) { + Args.push_back(ImplicitParamDecl::Create( + C, /*DC=*/nullptr, Loc, + /*Id=*/nullptr, C.getPointerType(C.getPointerType(E->getType())) + .withConst() + .withRestrict())); + auto *VD = cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl()); + PrivateVarsPos[VD] = Counter; + ++Counter; + } + FunctionType::ExtInfo Info; + auto &TaskPrivatesMapFnInfo = + CGM.getTypes().arrangeFreeFunctionDeclaration(C.VoidTy, Args, Info, + /*isVariadic=*/false); + auto *TaskPrivatesMapTy = + CGM.getTypes().GetFunctionType(TaskPrivatesMapFnInfo); + auto *TaskPrivatesMap = llvm::Function::Create( + TaskPrivatesMapTy, llvm::GlobalValue::InternalLinkage, + ".omp_task_privates_map.", &CGM.getModule()); + CGM.SetLLVMFunctionAttributes(/*D=*/nullptr, TaskPrivatesMapFnInfo, + TaskPrivatesMap); + TaskPrivatesMap->addFnAttr(llvm::Attribute::AlwaysInline); + CodeGenFunction CGF(CGM); + CGF.disableDebugInfo(); + CGF.StartFunction(GlobalDecl(), C.VoidTy, TaskPrivatesMap, + TaskPrivatesMapFnInfo, Args); + + // *privi = &.privates.privi; + auto *TaskPrivatesArgAddr = CGF.Builder.CreateAlignedLoad( + CGF.GetAddrOfLocalVar(&TaskPrivatesArg), CGM.PointerAlignInBytes); + LValue Base = + CGF.MakeNaturalAlignAddrLValue(TaskPrivatesArgAddr, PrivatesQTy); + auto *PrivatesQTyRD = cast<RecordDecl>(PrivatesQTy->getAsTagDecl()); + Counter = 0; + for (auto *Field : PrivatesQTyRD->fields()) { + auto FieldLVal = CGF.EmitLValueForField(Base, Field); + auto *VD = Args[PrivateVarsPos[Privates[Counter].second.Original]]; + auto RefLVal = CGF.MakeNaturalAlignAddrLValue(CGF.GetAddrOfLocalVar(VD), + VD->getType()); + auto RefLoadRVal = CGF.EmitLoadOfLValue(RefLVal, Loc); + CGF.EmitStoreOfScalar( + FieldLVal.getAddress(), + CGF.MakeNaturalAlignAddrLValue(RefLoadRVal.getScalarVal(), + RefLVal.getType()->getPointeeType())); + ++Counter; + } + CGF.FinishFunction(); + return TaskPrivatesMap; +} + +static int array_pod_sort_comparator(const PrivateDataTy *P1, + const PrivateDataTy *P2) { + return P1->first < P2->first ? 1 : (P2->first < P1->first ? -1 : 0); +} + +void CGOpenMPRuntime::emitTaskCall( + CodeGenFunction &CGF, SourceLocation Loc, const OMPExecutableDirective &D, + bool Tied, llvm::PointerIntPair<llvm::Value *, 1, bool> Final, + llvm::Value *TaskFunction, QualType SharedsTy, llvm::Value *Shareds, + const Expr *IfCond, const ArrayRef<const Expr *> PrivateVars, + const ArrayRef<const Expr *> PrivateCopies, + const ArrayRef<const Expr *> FirstprivateVars, + const ArrayRef<const Expr *> FirstprivateCopies, + const ArrayRef<const Expr *> FirstprivateInits) { + auto &C = CGM.getContext(); + llvm::SmallVector<PrivateDataTy, 8> Privates; + // Aggregate privates and sort them by the alignment. + auto I = PrivateCopies.begin(); + for (auto *E : PrivateVars) { + auto *VD = cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl()); + Privates.push_back(std::make_pair( + C.getTypeAlignInChars(VD->getType()), + PrivateHelpersTy(VD, cast<VarDecl>(cast<DeclRefExpr>(*I)->getDecl()), + /*PrivateElemInit=*/nullptr))); + ++I; + } + I = FirstprivateCopies.begin(); + auto IElemInitRef = FirstprivateInits.begin(); + for (auto *E : FirstprivateVars) { + auto *VD = cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl()); + Privates.push_back(std::make_pair( + C.getTypeAlignInChars(VD->getType()), + PrivateHelpersTy( + VD, cast<VarDecl>(cast<DeclRefExpr>(*I)->getDecl()), + cast<VarDecl>(cast<DeclRefExpr>(*IElemInitRef)->getDecl())))); + ++I, ++IElemInitRef; + } + llvm::array_pod_sort(Privates.begin(), Privates.end(), + array_pod_sort_comparator); + auto KmpInt32Ty = C.getIntTypeForBitwidth(/*DestWidth=*/32, /*Signed=*/1); + // Build type kmp_routine_entry_t (if not built yet). + emitKmpRoutineEntryT(KmpInt32Ty); + // Build type kmp_task_t (if not built yet). + if (KmpTaskTQTy.isNull()) { + KmpTaskTQTy = C.getRecordType( + createKmpTaskTRecordDecl(CGM, KmpInt32Ty, KmpRoutineEntryPtrQTy)); + } + auto *KmpTaskTQTyRD = cast<RecordDecl>(KmpTaskTQTy->getAsTagDecl()); + // Build particular struct kmp_task_t for the given task. + auto *KmpTaskTWithPrivatesQTyRD = + createKmpTaskTWithPrivatesRecordDecl(CGM, KmpTaskTQTy, Privates); + auto KmpTaskTWithPrivatesQTy = C.getRecordType(KmpTaskTWithPrivatesQTyRD); + QualType KmpTaskTWithPrivatesPtrQTy = + C.getPointerType(KmpTaskTWithPrivatesQTy); + auto *KmpTaskTWithPrivatesTy = CGF.ConvertType(KmpTaskTWithPrivatesQTy); + auto *KmpTaskTWithPrivatesPtrTy = KmpTaskTWithPrivatesTy->getPointerTo(); + auto KmpTaskTWithPrivatesTySize = + CGM.getSize(C.getTypeSizeInChars(KmpTaskTWithPrivatesQTy)); + QualType SharedsPtrTy = C.getPointerType(SharedsTy); + + // Emit initial values for private copies (if any). + llvm::Value *TaskPrivatesMap = nullptr; + auto *TaskPrivatesMapTy = + std::next(cast<llvm::Function>(TaskFunction)->getArgumentList().begin(), + 3) + ->getType(); + if (!Privates.empty()) { + auto FI = std::next(KmpTaskTWithPrivatesQTyRD->field_begin()); + TaskPrivatesMap = emitTaskPrivateMappingFunction( + CGM, Loc, PrivateVars, FirstprivateVars, FI->getType(), Privates); + TaskPrivatesMap = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( + TaskPrivatesMap, TaskPrivatesMapTy); + } else { + TaskPrivatesMap = llvm::ConstantPointerNull::get( + cast<llvm::PointerType>(TaskPrivatesMapTy)); + } + // Build a proxy function kmp_int32 .omp_task_entry.(kmp_int32 gtid, + // kmp_task_t *tt); + auto *TaskEntry = emitProxyTaskFunction( + CGM, Loc, KmpInt32Ty, KmpTaskTWithPrivatesPtrQTy, KmpTaskTWithPrivatesQTy, + KmpTaskTQTy, SharedsPtrTy, TaskFunction, TaskPrivatesMap); + + // Build call kmp_task_t * __kmpc_omp_task_alloc(ident_t *, kmp_int32 gtid, + // kmp_int32 flags, size_t sizeof_kmp_task_t, size_t sizeof_shareds, + // kmp_routine_entry_t *task_entry); + // Task flags. Format is taken from + // http://llvm.org/svn/llvm-project/openmp/trunk/runtime/src/kmp.h, + // description of kmp_tasking_flags struct. + const unsigned TiedFlag = 0x1; + const unsigned FinalFlag = 0x2; + unsigned Flags = Tied ? TiedFlag : 0; + auto *TaskFlags = + Final.getPointer() + ? CGF.Builder.CreateSelect(Final.getPointer(), + CGF.Builder.getInt32(FinalFlag), + CGF.Builder.getInt32(/*C=*/0)) + : CGF.Builder.getInt32(Final.getInt() ? FinalFlag : 0); + TaskFlags = CGF.Builder.CreateOr(TaskFlags, CGF.Builder.getInt32(Flags)); + auto SharedsSize = C.getTypeSizeInChars(SharedsTy); + llvm::Value *AllocArgs[] = { + emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc), TaskFlags, + KmpTaskTWithPrivatesTySize, CGM.getSize(SharedsSize), + CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(TaskEntry, + KmpRoutineEntryPtrTy)}; + auto *NewTask = CGF.EmitRuntimeCall( + createRuntimeFunction(OMPRTL__kmpc_omp_task_alloc), AllocArgs); + auto *NewTaskNewTaskTTy = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( + NewTask, KmpTaskTWithPrivatesPtrTy); + LValue Base = CGF.MakeNaturalAlignAddrLValue(NewTaskNewTaskTTy, + KmpTaskTWithPrivatesQTy); + LValue TDBase = + CGF.EmitLValueForField(Base, *KmpTaskTWithPrivatesQTyRD->field_begin()); + // Fill the data in the resulting kmp_task_t record. + // Copy shareds if there are any. + llvm::Value *KmpTaskSharedsPtr = nullptr; + if (!SharedsTy->getAsStructureType()->getDecl()->field_empty()) { + KmpTaskSharedsPtr = CGF.EmitLoadOfScalar( + CGF.EmitLValueForField( + TDBase, *std::next(KmpTaskTQTyRD->field_begin(), KmpTaskTShareds)), + Loc); + CGF.EmitAggregateCopy(KmpTaskSharedsPtr, Shareds, SharedsTy); + } + // Emit initial values for private copies (if any). + bool NeedsCleanup = false; + if (!Privates.empty()) { + auto FI = std::next(KmpTaskTWithPrivatesQTyRD->field_begin()); + auto PrivatesBase = CGF.EmitLValueForField(Base, *FI); + FI = cast<RecordDecl>(FI->getType()->getAsTagDecl())->field_begin(); + LValue SharedsBase; + if (!FirstprivateVars.empty()) { + SharedsBase = CGF.MakeNaturalAlignAddrLValue( + CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( + KmpTaskSharedsPtr, CGF.ConvertTypeForMem(SharedsPtrTy)), + SharedsTy); + } + CodeGenFunction::CGCapturedStmtInfo CapturesInfo( + cast<CapturedStmt>(*D.getAssociatedStmt())); + for (auto &&Pair : Privates) { + auto *VD = Pair.second.PrivateCopy; + auto *Init = VD->getAnyInitializer(); + LValue PrivateLValue = CGF.EmitLValueForField(PrivatesBase, *FI); + if (Init) { + if (auto *Elem = Pair.second.PrivateElemInit) { + auto *OriginalVD = Pair.second.Original; + auto *SharedField = CapturesInfo.lookup(OriginalVD); + auto SharedRefLValue = + CGF.EmitLValueForField(SharedsBase, SharedField); + QualType Type = OriginalVD->getType(); + if (Type->isArrayType()) { + // Initialize firstprivate array. + if (!isa<CXXConstructExpr>(Init) || + CGF.isTrivialInitializer(Init)) { + // Perform simple memcpy. + CGF.EmitAggregateAssign(PrivateLValue.getAddress(), + SharedRefLValue.getAddress(), Type); + } else { + // Initialize firstprivate array using element-by-element + // intialization. + CGF.EmitOMPAggregateAssign( + PrivateLValue.getAddress(), SharedRefLValue.getAddress(), + Type, [&CGF, Elem, Init, &CapturesInfo]( + llvm::Value *DestElement, llvm::Value *SrcElement) { + // Clean up any temporaries needed by the initialization. + CodeGenFunction::OMPPrivateScope InitScope(CGF); + InitScope.addPrivate(Elem, [SrcElement]() -> llvm::Value *{ + return SrcElement; + }); + (void)InitScope.Privatize(); + // Emit initialization for single element. + auto *OldCapturedStmtInfo = CGF.CapturedStmtInfo; + CGF.CapturedStmtInfo = &CapturesInfo; + CGF.EmitAnyExprToMem(Init, DestElement, + Init->getType().getQualifiers(), + /*IsInitializer=*/false); + CGF.CapturedStmtInfo = OldCapturedStmtInfo; + }); + } + } else { + CodeGenFunction::OMPPrivateScope InitScope(CGF); + InitScope.addPrivate(Elem, [SharedRefLValue]() -> llvm::Value *{ + return SharedRefLValue.getAddress(); + }); + (void)InitScope.Privatize(); + auto *OldCapturedStmtInfo = CGF.CapturedStmtInfo; + CGF.CapturedStmtInfo = &CapturesInfo; + CGF.EmitExprAsInit(Init, VD, PrivateLValue, + /*capturedByInit=*/false); + CGF.CapturedStmtInfo = OldCapturedStmtInfo; + } + } else { + CGF.EmitExprAsInit(Init, VD, PrivateLValue, /*capturedByInit=*/false); + } + } + NeedsCleanup = NeedsCleanup || FI->getType().isDestructedType(); + ++FI; + } + } + // Provide pointer to function with destructors for privates. + llvm::Value *DestructorFn = + NeedsCleanup ? emitDestructorsFunction(CGM, Loc, KmpInt32Ty, + KmpTaskTWithPrivatesPtrQTy, + KmpTaskTWithPrivatesQTy) + : llvm::ConstantPointerNull::get( + cast<llvm::PointerType>(KmpRoutineEntryPtrTy)); + LValue Destructor = CGF.EmitLValueForField( + TDBase, *std::next(KmpTaskTQTyRD->field_begin(), KmpTaskTDestructors)); + CGF.EmitStoreOfScalar(CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( + DestructorFn, KmpRoutineEntryPtrTy), + Destructor); + // NOTE: routine and part_id fields are intialized by __kmpc_omp_task_alloc() + // libcall. + // Build kmp_int32 __kmpc_omp_task(ident_t *, kmp_int32 gtid, kmp_task_t + // *new_task); + auto *ThreadID = getThreadID(CGF, Loc); + llvm::Value *TaskArgs[] = {emitUpdateLocation(CGF, Loc), ThreadID, NewTask}; + auto &&ThenCodeGen = [this, &TaskArgs](CodeGenFunction &CGF) { + // TODO: add check for untied tasks. + CGF.EmitRuntimeCall(createRuntimeFunction(OMPRTL__kmpc_omp_task), TaskArgs); + }; + typedef CallEndCleanup<std::extent<decltype(TaskArgs)>::value> + IfCallEndCleanup; + auto &&ElseCodeGen = + [this, &TaskArgs, ThreadID, NewTaskNewTaskTTy, TaskEntry]( + CodeGenFunction &CGF) { + CodeGenFunction::RunCleanupsScope LocalScope(CGF); + CGF.EmitRuntimeCall( + createRuntimeFunction(OMPRTL__kmpc_omp_task_begin_if0), TaskArgs); + // Build void __kmpc_omp_task_complete_if0(ident_t *, kmp_int32 gtid, + // kmp_task_t *new_task); + CGF.EHStack.pushCleanup<IfCallEndCleanup>( + NormalAndEHCleanup, + createRuntimeFunction(OMPRTL__kmpc_omp_task_complete_if0), + llvm::makeArrayRef(TaskArgs)); + + // Call proxy_task_entry(gtid, new_task); + llvm::Value *OutlinedFnArgs[] = {ThreadID, NewTaskNewTaskTTy}; + CGF.EmitCallOrInvoke(TaskEntry, OutlinedFnArgs); + }; + if (IfCond) { + emitOMPIfClause(CGF, IfCond, ThenCodeGen, ElseCodeGen); + } else { + CodeGenFunction::RunCleanupsScope Scope(CGF); + ThenCodeGen(CGF); + } +} + +static llvm::Value *emitReductionFunction(CodeGenModule &CGM, + llvm::Type *ArgsType, + ArrayRef<const Expr *> LHSExprs, + ArrayRef<const Expr *> RHSExprs, + ArrayRef<const Expr *> ReductionOps) { + auto &C = CGM.getContext(); + + // void reduction_func(void *LHSArg, void *RHSArg); + FunctionArgList Args; + ImplicitParamDecl LHSArg(C, /*DC=*/nullptr, SourceLocation(), /*Id=*/nullptr, + C.VoidPtrTy); + ImplicitParamDecl RHSArg(C, /*DC=*/nullptr, SourceLocation(), /*Id=*/nullptr, + C.VoidPtrTy); + Args.push_back(&LHSArg); + Args.push_back(&RHSArg); + FunctionType::ExtInfo EI; + auto &CGFI = CGM.getTypes().arrangeFreeFunctionDeclaration( + C.VoidTy, Args, EI, /*isVariadic=*/false); + auto *Fn = llvm::Function::Create( + CGM.getTypes().GetFunctionType(CGFI), llvm::GlobalValue::InternalLinkage, + ".omp.reduction.reduction_func", &CGM.getModule()); + CGM.SetLLVMFunctionAttributes(/*D=*/nullptr, CGFI, Fn); + CodeGenFunction CGF(CGM); + CGF.StartFunction(GlobalDecl(), C.VoidTy, Fn, CGFI, Args); + + // Dst = (void*[n])(LHSArg); + // Src = (void*[n])(RHSArg); + auto *LHS = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( + CGF.Builder.CreateAlignedLoad(CGF.GetAddrOfLocalVar(&LHSArg), + CGF.PointerAlignInBytes), + ArgsType); + auto *RHS = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( + CGF.Builder.CreateAlignedLoad(CGF.GetAddrOfLocalVar(&RHSArg), + CGF.PointerAlignInBytes), + ArgsType); + + // ... + // *(Type<i>*)lhs[i] = RedOp<i>(*(Type<i>*)lhs[i], *(Type<i>*)rhs[i]); + // ... + CodeGenFunction::OMPPrivateScope Scope(CGF); + for (unsigned I = 0, E = ReductionOps.size(); I < E; ++I) { + Scope.addPrivate( + cast<VarDecl>(cast<DeclRefExpr>(RHSExprs[I])->getDecl()), + [&]() -> llvm::Value *{ + return CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( + CGF.Builder.CreateAlignedLoad( + CGF.Builder.CreateStructGEP(/*Ty=*/nullptr, RHS, I), + CGM.PointerAlignInBytes), + CGF.ConvertTypeForMem(C.getPointerType(RHSExprs[I]->getType()))); + }); + Scope.addPrivate( + cast<VarDecl>(cast<DeclRefExpr>(LHSExprs[I])->getDecl()), + [&]() -> llvm::Value *{ + return CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( + CGF.Builder.CreateAlignedLoad( + CGF.Builder.CreateStructGEP(/*Ty=*/nullptr, LHS, I), + CGM.PointerAlignInBytes), + CGF.ConvertTypeForMem(C.getPointerType(LHSExprs[I]->getType()))); + }); + } + Scope.Privatize(); + for (auto *E : ReductionOps) { + CGF.EmitIgnoredExpr(E); + } + Scope.ForceCleanup(); + CGF.FinishFunction(); + return Fn; +} + +void CGOpenMPRuntime::emitReduction(CodeGenFunction &CGF, SourceLocation Loc, + ArrayRef<const Expr *> LHSExprs, + ArrayRef<const Expr *> RHSExprs, + ArrayRef<const Expr *> ReductionOps, + bool WithNowait) { + // Next code should be emitted for reduction: + // + // static kmp_critical_name lock = { 0 }; + // + // void reduce_func(void *lhs[<n>], void *rhs[<n>]) { + // *(Type0*)lhs[0] = ReductionOperation0(*(Type0*)lhs[0], *(Type0*)rhs[0]); + // ... + // *(Type<n>-1*)lhs[<n>-1] = ReductionOperation<n>-1(*(Type<n>-1*)lhs[<n>-1], + // *(Type<n>-1*)rhs[<n>-1]); + // } + // + // ... + // void *RedList[<n>] = {&<RHSExprs>[0], ..., &<RHSExprs>[<n>-1]}; + // switch (__kmpc_reduce{_nowait}(<loc>, <gtid>, <n>, sizeof(RedList), + // RedList, reduce_func, &<lock>)) { + // case 1: + // ... + // <LHSExprs>[i] = RedOp<i>(*<LHSExprs>[i], *<RHSExprs>[i]); + // ... + // __kmpc_end_reduce{_nowait}(<loc>, <gtid>, &<lock>); + // break; + // case 2: + // ... + // Atomic(<LHSExprs>[i] = RedOp<i>(*<LHSExprs>[i], *<RHSExprs>[i])); + // ... + // [__kmpc_end_reduce(<loc>, <gtid>, &<lock>);] + // break; + // default:; + // } + + auto &C = CGM.getContext(); + + // 1. Build a list of reduction variables. + // void *RedList[<n>] = {<ReductionVars>[0], ..., <ReductionVars>[<n>-1]}; + llvm::APInt ArraySize(/*unsigned int numBits=*/32, RHSExprs.size()); + QualType ReductionArrayTy = + C.getConstantArrayType(C.VoidPtrTy, ArraySize, ArrayType::Normal, + /*IndexTypeQuals=*/0); + auto *ReductionList = + CGF.CreateMemTemp(ReductionArrayTy, ".omp.reduction.red_list"); + for (unsigned I = 0, E = RHSExprs.size(); I < E; ++I) { + auto *Elem = CGF.Builder.CreateStructGEP(/*Ty=*/nullptr, ReductionList, I); + CGF.Builder.CreateAlignedStore( + CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( + CGF.EmitLValue(RHSExprs[I]).getAddress(), CGF.VoidPtrTy), + Elem, CGM.PointerAlignInBytes); + } + + // 2. Emit reduce_func(). + auto *ReductionFn = emitReductionFunction( + CGM, CGF.ConvertTypeForMem(ReductionArrayTy)->getPointerTo(), LHSExprs, + RHSExprs, ReductionOps); + + // 3. Create static kmp_critical_name lock = { 0 }; + auto *Lock = getCriticalRegionLock(".reduction"); + + // 4. Build res = __kmpc_reduce{_nowait}(<loc>, <gtid>, <n>, sizeof(RedList), + // RedList, reduce_func, &<lock>); + auto *IdentTLoc = emitUpdateLocation( + CGF, Loc, + static_cast<OpenMPLocationFlags>(OMP_IDENT_KMPC | OMP_ATOMIC_REDUCE)); + auto *ThreadId = getThreadID(CGF, Loc); + auto *ReductionArrayTySize = llvm::ConstantInt::get( + CGM.SizeTy, C.getTypeSizeInChars(ReductionArrayTy).getQuantity()); + auto *RL = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(ReductionList, + CGF.VoidPtrTy); + llvm::Value *Args[] = { + IdentTLoc, // ident_t *<loc> + ThreadId, // i32 <gtid> + CGF.Builder.getInt32(RHSExprs.size()), // i32 <n> + ReductionArrayTySize, // size_type sizeof(RedList) + RL, // void *RedList + ReductionFn, // void (*) (void *, void *) <reduce_func> + Lock // kmp_critical_name *&<lock> + }; + auto Res = CGF.EmitRuntimeCall( + createRuntimeFunction(WithNowait ? OMPRTL__kmpc_reduce_nowait + : OMPRTL__kmpc_reduce), + Args); + + // 5. Build switch(res) + auto *DefaultBB = CGF.createBasicBlock(".omp.reduction.default"); + auto *SwInst = CGF.Builder.CreateSwitch(Res, DefaultBB, /*NumCases=*/2); + + // 6. Build case 1: + // ... + // <LHSExprs>[i] = RedOp<i>(*<LHSExprs>[i], *<RHSExprs>[i]); + // ... + // __kmpc_end_reduce{_nowait}(<loc>, <gtid>, &<lock>); + // break; + auto *Case1BB = CGF.createBasicBlock(".omp.reduction.case1"); + SwInst->addCase(CGF.Builder.getInt32(1), Case1BB); + CGF.EmitBlock(Case1BB); + + { + CodeGenFunction::RunCleanupsScope Scope(CGF); + // Add emission of __kmpc_end_reduce{_nowait}(<loc>, <gtid>, &<lock>); + llvm::Value *EndArgs[] = { + IdentTLoc, // ident_t *<loc> + ThreadId, // i32 <gtid> + Lock // kmp_critical_name *&<lock> + }; + CGF.EHStack + .pushCleanup<CallEndCleanup<std::extent<decltype(EndArgs)>::value>>( + NormalAndEHCleanup, + createRuntimeFunction(WithNowait ? OMPRTL__kmpc_end_reduce_nowait + : OMPRTL__kmpc_end_reduce), + llvm::makeArrayRef(EndArgs)); + for (auto *E : ReductionOps) { + CGF.EmitIgnoredExpr(E); + } + } + + CGF.EmitBranch(DefaultBB); + + // 7. Build case 2: + // ... + // Atomic(<LHSExprs>[i] = RedOp<i>(*<LHSExprs>[i], *<RHSExprs>[i])); + // ... + // break; + auto *Case2BB = CGF.createBasicBlock(".omp.reduction.case2"); + SwInst->addCase(CGF.Builder.getInt32(2), Case2BB); + CGF.EmitBlock(Case2BB); + + { + CodeGenFunction::RunCleanupsScope Scope(CGF); + if (!WithNowait) { + // Add emission of __kmpc_end_reduce(<loc>, <gtid>, &<lock>); + llvm::Value *EndArgs[] = { + IdentTLoc, // ident_t *<loc> + ThreadId, // i32 <gtid> + Lock // kmp_critical_name *&<lock> + }; + CGF.EHStack + .pushCleanup<CallEndCleanup<std::extent<decltype(EndArgs)>::value>>( + NormalAndEHCleanup, + createRuntimeFunction(OMPRTL__kmpc_end_reduce), + llvm::makeArrayRef(EndArgs)); + } + auto I = LHSExprs.begin(); + for (auto *E : ReductionOps) { + const Expr *XExpr = nullptr; + const Expr *EExpr = nullptr; + const Expr *UpExpr = nullptr; + BinaryOperatorKind BO = BO_Comma; + if (auto *BO = dyn_cast<BinaryOperator>(E)) { + if (BO->getOpcode() == BO_Assign) { + XExpr = BO->getLHS(); + UpExpr = BO->getRHS(); + } + } + // Try to emit update expression as a simple atomic. + auto *RHSExpr = UpExpr; + if (RHSExpr) { + // Analyze RHS part of the whole expression. + if (auto *ACO = dyn_cast<AbstractConditionalOperator>( + RHSExpr->IgnoreParenImpCasts())) { + // If this is a conditional operator, analyze its condition for + // min/max reduction operator. + RHSExpr = ACO->getCond(); + } + if (auto *BORHS = + dyn_cast<BinaryOperator>(RHSExpr->IgnoreParenImpCasts())) { + EExpr = BORHS->getRHS(); + BO = BORHS->getOpcode(); + } + } + if (XExpr) { + auto *VD = cast<VarDecl>(cast<DeclRefExpr>(*I)->getDecl()); + LValue X = CGF.EmitLValue(XExpr); + RValue E; + if (EExpr) + E = CGF.EmitAnyExpr(EExpr); + CGF.EmitOMPAtomicSimpleUpdateExpr( + X, E, BO, /*IsXLHSInRHSPart=*/true, llvm::Monotonic, Loc, + [&CGF, UpExpr, VD](RValue XRValue) { + CodeGenFunction::OMPPrivateScope PrivateScope(CGF); + PrivateScope.addPrivate( + VD, [&CGF, VD, XRValue]() -> llvm::Value *{ + auto *LHSTemp = CGF.CreateMemTemp(VD->getType()); + CGF.EmitStoreThroughLValue( + XRValue, + CGF.MakeNaturalAlignAddrLValue(LHSTemp, VD->getType())); + return LHSTemp; + }); + (void)PrivateScope.Privatize(); + return CGF.EmitAnyExpr(UpExpr); + }); + } else { + // Emit as a critical region. + emitCriticalRegion(CGF, ".atomic_reduction", [E](CodeGenFunction &CGF) { + CGF.EmitIgnoredExpr(E); + }, Loc); + } + ++I; + } + } + + CGF.EmitBranch(DefaultBB); + CGF.EmitBlock(DefaultBB, /*IsFinished=*/true); +} + +void CGOpenMPRuntime::emitTaskwaitCall(CodeGenFunction &CGF, + SourceLocation Loc) { + // Build call kmp_int32 __kmpc_omp_taskwait(ident_t *loc, kmp_int32 + // global_tid); + llvm::Value *Args[] = {emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc)}; + // Ignore return result until untied tasks are supported. + CGF.EmitRuntimeCall(createRuntimeFunction(OMPRTL__kmpc_omp_taskwait), Args); +} + +void CGOpenMPRuntime::emitInlinedDirective(CodeGenFunction &CGF, + const RegionCodeGenTy &CodeGen) { + InlinedOpenMPRegionRAII Region(CGF, CodeGen); + CGF.CapturedStmtInfo->EmitBody(CGF, /*S=*/nullptr); +} + |