OMPIRBuilder.cpp File Reference

This file implements the OpenMPIRBuilder class, which is used as a convenient way to create LLVM instructions for OpenMP directives. More...

#include "llvm/Frontend/OpenMP/OMPIRBuilder.h"
#include "llvm/ADT/SmallBitVector.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Analysis/AssumptionCache.h"
#include "llvm/Analysis/CodeMetrics.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/OptimizationRemarkEmitter.h"
#include "llvm/Analysis/ScalarEvolution.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/Bitcode/BitcodeReader.h"
#include "llvm/Frontend/Offloading/Utility.h"
#include "llvm/Frontend/OpenMP/OMPGridValues.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/CFG.h"
#include "llvm/IR/CallingConv.h"
#include "llvm/IR/Constant.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DIBuilder.h"
#include "llvm/IR/DebugInfoMetadata.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/MDBuilder.h"
#include "llvm/IR/Metadata.h"
#include "llvm/IR/PassInstrumentation.h"
#include "llvm/IR/PassManager.h"
#include "llvm/IR/ReplaceConstant.h"
#include "llvm/IR/Value.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Transforms/Utils/BasicBlockUtils.h"
#include "llvm/Transforms/Utils/Cloning.h"
#include "llvm/Transforms/Utils/CodeExtractor.h"
#include "llvm/Transforms/Utils/LoopPeel.h"
#include "llvm/Transforms/Utils/UnrollLoop.h"
#include <cstdint>
#include <optional>
#include "llvm/Frontend/OpenMP/OMPKinds.def"

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "openmp-ir-builder"
#define	OMP_ATTRS_SET(VarName, AttrSet)   AttributeSet VarName = AttrSet;
#define	OMP_RTL_ATTRS(Enum, FnAttrSet, RetAttrSet, ArgAttrSets)
#define	OMP_RTL(Enum, Str, IsVarArg, ReturnType, ...)
#define	OMP_RTL(Enum, Str, ...)
#define	OMP_CANCEL_KIND(Enum, Str, DirectiveEnum, Value)
#define	OMP_TYPE(VarName, InitValue)   VarName = InitValue;
#define	OMP_ARRAY_TYPE(VarName, ElemTy, ArraySize)
#define	OMP_FUNCTION_TYPE(VarName, IsVarArg, ReturnType, ...)
#define	OMP_STRUCT_TYPE(VarName, StructName, Packed, ...)

Functions
static bool	isConflictIP (IRBuilder<>::InsertPoint IP1, IRBuilder<>::InsertPoint IP2)
	Return whether IP1 and IP2 are ambiguous, i.e.
static bool	isValidWorkshareLoopScheduleType (OMPScheduleType SchedType)
static const omp::GV &	getGridValue (const Triple &T, Function *Kernel)
static OMPScheduleType	getOpenMPBaseScheduleType (llvm::omp::ScheduleKind ClauseKind, bool HasChunks, bool HasSimdModifier)
	Determine which scheduling algorithm to use, determined from schedule clause arguments.
static OMPScheduleType	getOpenMPOrderingScheduleType (OMPScheduleType BaseScheduleType, bool HasOrderedClause)
	Adds ordering modifier flags to schedule type.
static OMPScheduleType	getOpenMPMonotonicityScheduleType (OMPScheduleType ScheduleType, bool HasSimdModifier, bool HasMonotonic, bool HasNonmonotonic, bool HasOrderedClause)
	Adds monotonicity modifier flags to schedule type.
static OMPScheduleType	computeOpenMPScheduleType (ScheduleKind ClauseKind, bool HasChunks, bool HasSimdModifier, bool HasMonotonicModifier, bool HasNonmonotonicModifier, bool HasOrderedClause)
	Determine the schedule type using schedule and ordering clause arguments.
static llvm::Value *	emitImplicitCast (IRBuilder<> &Builder, llvm::Value *XRead, llvm::Value *V)
	Emit an implicit cast to convert XRead to type of variable V.
static void	redirectTo (BasicBlock *Source, BasicBlock *Target, DebugLoc DL)
	Make Source branch to Target.
Value *	createFakeIntVal (IRBuilderBase &Builder, OpenMPIRBuilder::InsertPointTy OuterAllocaIP, llvm::SmallVectorImpl< Instruction * > &ToBeDeleted, OpenMPIRBuilder::InsertPointTy InnerAllocaIP, const Twine &Name="", bool AsPtr=true)
static void	raiseUserConstantDataAllocasToEntryBlock (IRBuilderBase &Builder, Function *Function)
static void	targetParallelCallback (OpenMPIRBuilder *OMPIRBuilder, Function &OutlinedFn, Function *OuterFn, BasicBlock *OuterAllocaBB, Value *Ident, Value *IfCondition, Value *NumThreads, Instruction *PrivTID, AllocaInst *PrivTIDAddr, Value *ThreadID, const SmallVector< Instruction *, 4 > &ToBeDeleted)
static void	hostParallelCallback (OpenMPIRBuilder *OMPIRBuilder, Function &OutlinedFn, Function *OuterFn, Value *Ident, Value *IfCondition, Instruction *PrivTID, AllocaInst *PrivTIDAddr, const SmallVector< Instruction *, 4 > &ToBeDeleted)
static Value *	emitTaskDependencies (OpenMPIRBuilder &OMPBuilder, const SmallVectorImpl< OpenMPIRBuilder::DependData > &Dependencies)
static OpenMPIRBuilder::InsertPointTy	getInsertPointAfterInstr (Instruction *I)
static void	checkReductionInfos (ArrayRef< OpenMPIRBuilder::ReductionInfo > ReductionInfos, bool IsGPU)
static Function *	getFreshReductionFunc (Module &M)
static FunctionCallee	getKmpcForStaticInitForType (Type *Ty, Module &M, OpenMPIRBuilder &OMPBuilder)
static FunctionCallee	getKmpcForStaticLoopForType (Type *Ty, OpenMPIRBuilder *OMPBuilder, WorksharingLoopType LoopType)
static void	createTargetLoopWorkshareCall (OpenMPIRBuilder *OMPBuilder, WorksharingLoopType LoopType, BasicBlock *InsertBlock, Value *Ident, Value *LoopBodyArg, Type *ParallelTaskPtr, Value *TripCount, Function &LoopBodyFn)
static void	workshareLoopTargetCallback (OpenMPIRBuilder *OMPIRBuilder, CanonicalLoopInfo *CLI, Value *Ident, Function &OutlinedFn, Type *ParallelTaskPtr, const SmallVector< Instruction *, 4 > &ToBeDeleted, WorksharingLoopType LoopType)
static FunctionCallee	getKmpcForDynamicInitForType (Type *Ty, Module &M, OpenMPIRBuilder &OMPBuilder)
	Returns an LLVM function to call for initializing loop bounds using OpenMP dynamic scheduling depending on type.
static FunctionCallee	getKmpcForDynamicNextForType (Type *Ty, Module &M, OpenMPIRBuilder &OMPBuilder)
	Returns an LLVM function to call for updating the next loop using OpenMP dynamic scheduling depending on type.
static FunctionCallee	getKmpcForDynamicFiniForType (Type *Ty, Module &M, OpenMPIRBuilder &OMPBuilder)
	Returns an LLVM function to call for finalizing the dynamic loop using depending on type.
static void	redirectAllPredecessorsTo (BasicBlock *OldTarget, BasicBlock *NewTarget, DebugLoc DL)
	Redirect all edges that branch to OldTarget to NewTarget.
static void	removeUnusedBlocksFromParent (ArrayRef< BasicBlock * > BBs)
	Determine which blocks in BBs are reachable from outside and remove the ones that are not reachable from the function.
static void	addBasicBlockMetadata (BasicBlock *BB, ArrayRef< Metadata * > Properties)
	Attach metadata Properties to the basic block described by BB.
static void	addLoopMetadata (CanonicalLoopInfo *Loop, ArrayRef< Metadata * > Properties)
	Attach loop metadata Properties to the loop described by Loop.
static void	addSimdMetadata (BasicBlock *Block, MDNode *AccessGroup, LoopInfo &LI)
	Attach llvm.access.group metadata to the memref instructions of Block.
static std::unique_ptr< TargetMachine >	createTargetMachine (Function *F, CodeGenOptLevel OptLevel)
	Create the TargetMachine object to query the backend for optimization preferences.
static int32_t	computeHeuristicUnrollFactor (CanonicalLoopInfo *CLI)
	Heuristically determine the best-performant unroll factor for CLI.
static MDNode *	getNVPTXMDNode (Function &Kernel, StringRef Name)
static void	updateNVPTXMetadata (Function &Kernel, StringRef Name, int32_t Value, bool Min)
static Expected< Function * >	createOutlinedFunction (OpenMPIRBuilder &OMPBuilder, IRBuilderBase &Builder, const OpenMPIRBuilder::TargetKernelDefaultAttrs &DefaultAttrs, StringRef FuncName, SmallVectorImpl< Value * > &Inputs, OpenMPIRBuilder::TargetBodyGenCallbackTy &CBFunc, OpenMPIRBuilder::TargetGenArgAccessorsCallbackTy &ArgAccessorFuncCB)
static Function *	emitTargetTaskProxyFunction (OpenMPIRBuilder &OMPBuilder, IRBuilderBase &Builder, CallInst *StaleCI)
	Create an entry point for a target task with the following.
static Error	emitTargetOutlinedFunction (OpenMPIRBuilder &OMPBuilder, IRBuilderBase &Builder, bool IsOffloadEntry, TargetRegionEntryInfo &EntryInfo, const OpenMPIRBuilder::TargetKernelDefaultAttrs &DefaultAttrs, Function *&OutlinedFn, Constant *&OutlinedFnID, SmallVectorImpl< Value * > &Inputs, OpenMPIRBuilder::TargetBodyGenCallbackTy &CBFunc, OpenMPIRBuilder::TargetGenArgAccessorsCallbackTy &ArgAccessorFuncCB)
static void	emitTargetCall (OpenMPIRBuilder &OMPBuilder, IRBuilderBase &Builder, OpenMPIRBuilder::InsertPointTy AllocaIP, const OpenMPIRBuilder::TargetKernelDefaultAttrs &DefaultAttrs, const OpenMPIRBuilder::TargetKernelRuntimeAttrs &RuntimeAttrs, Value *IfCond, Function *OutlinedFn, Constant *OutlinedFnID, SmallVectorImpl< Value * > &Args, OpenMPIRBuilder::GenMapInfoCallbackTy GenMapInfoCB, SmallVector< llvm::OpenMPIRBuilder::DependData > Dependencies={}, bool HasNoWait=false)

Variables
static cl::opt< bool >	OptimisticAttributes ("openmp-ir-builder-optimistic-attributes", cl::Hidden, cl::desc("Use optimistic attributes describing " "'as-if' properties of runtime calls."), cl::init(false))
static cl::opt< double >	UnrollThresholdFactor ("openmp-ir-builder-unroll-threshold-factor", cl::Hidden, cl::desc("Factor for the unroll threshold to account for code " "simplifications still taking place"), cl::init(1.5))

Detailed Description

This file implements the OpenMPIRBuilder class, which is used as a convenient way to create LLVM instructions for OpenMP directives.

Definition in file OMPIRBuilder.cpp.

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "openmp-ir-builder"

Definition at line 63 of file OMPIRBuilder.cpp.

OMP_ARRAY_TYPE

#define OMP_ARRAY_TYPE	(		VarName,
			ElemTy,
			ArraySize
	)

Value:

  VarName##Ty = ArrayType::get(ElemTy, ArraySize);                             \
  VarName##PtrTy = PointerType::getUnqual(VarName##Ty);

OMP_ATTRS_SET

#define OMP_ATTRS_SET	(		VarName,
			AttrSet
	)		AttributeSet VarName = AttrSet;

OMP_CANCEL_KIND

#define OMP_CANCEL_KIND	(		Enum,
			Str,
			DirectiveEnum,
			Value
	)

Value:

  case DirectiveEnum:                                                          \
    CancelKind = Builder.getInt32(Value);                                      \
    break;

OMP_FUNCTION_TYPE

#define OMP_FUNCTION_TYPE	(		VarName,
			IsVarArg,
			ReturnType,
			...
	)

Value:

  VarName = FunctionType::get(ReturnType, {__VA_ARGS__}, IsVarArg);            \
  VarName##Ptr = PointerType::getUnqual(VarName);

OMP_RTL [1/2]

#define OMP_RTL	(		Enum,
			Str,
			IsVarArg,
			ReturnType,
			...
	)

Value:

  case Enum:                                                                   \
    FnTy = FunctionType::get(ReturnType, ArrayRef<Type *>{__VA_ARGS__},        \
                             IsVarArg);                                        \
    Fn = M.getFunction(Str);                                                   \
    break;

OMP_RTL [2/2]

#define OMP_RTL	(		Enum,
			Str,
			...
	)

Value:

  case Enum:                                                                   \
    Fn = Function::Create(FnTy, GlobalValue::ExternalLinkage, Str, M);         \
    break;

OMP_RTL_ATTRS

#define OMP_RTL_ATTRS	(		Enum,
			FnAttrSet,
			RetAttrSet,
			ArgAttrSets
	)

Value:

  case Enum:                                                                   \
    FnAttrs = FnAttrs.addAttributes(Ctx, FnAttrSet);                           \
    addAttrSet(RetAttrs, RetAttrSet, /*Param*/ false);                         \
    for (size_t ArgNo = 0; ArgNo < ArgAttrSets.size(); ++ArgNo)                \
      addAttrSet(ArgAttrs[ArgNo], ArgAttrSets[ArgNo]);                         \
    Fn.setAttributes(AttributeList::get(Ctx, FnAttrs, RetAttrs, ArgAttrs));    \
    break;

OMP_STRUCT_TYPE

#define OMP_STRUCT_TYPE	(		VarName,
			StructName,
			Packed,
			...
	)

Value:

  T = StructType::getTypeByName(Ctx, StructName);                              \
  if (!T)                                                                      \
    T = StructType::create(Ctx, {__VA_ARGS__}, StructName, Packed);            \
  VarName = T;                                                                 \
  VarName##Ptr = PointerType::getUnqual(T);

OMP_TYPE

#define OMP_TYPE	(		VarName,
			InitValue
	)		VarName = InitValue;

Function Documentation

addBasicBlockMetadata()

static void addBasicBlockMetadata ( BasicBlock *  BB, ArrayRef< Metadata * >  Properties  )

static

Attach metadata Properties to the basic block described by BB.

If the basic block already has metadata, the basic block properties are appended.

Definition at line 5207 of file OMPIRBuilder.cpp.

References llvm::append_range(), llvm::drop_begin(), llvm::ArrayRef< T >::empty(), llvm::BasicBlock::getContext(), llvm::MDNode::getDistinct(), llvm::Instruction::getMetadata(), llvm::BasicBlock::getTerminator(), llvm::MDNode::operands(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::MDNode::replaceOperandWith(), and llvm::Instruction::setMetadata().

Referenced by addLoopMetadata(), and llvm::OpenMPIRBuilder::applySimd().

addLoopMetadata()

static void addLoopMetadata ( CanonicalLoopInfo *  Loop, ArrayRef< Metadata * >  Properties  )

static

Attach loop metadata Properties to the loop described by Loop.

If the loop already has metadata, the loop properties are appended.

Definition at line 5231 of file OMPIRBuilder.cpp.

References addBasicBlockMetadata(), and assert().

Referenced by llvm::OpenMPIRBuilder::applySimd(), llvm::OpenMPIRBuilder::unrollLoopFull(), llvm::OpenMPIRBuilder::unrollLoopHeuristic(), and llvm::OpenMPIRBuilder::unrollLoopPartial().

addSimdMetadata()

static void addSimdMetadata ( BasicBlock *  Block, MDNode *  AccessGroup, LoopInfo &  LI  )

static

Attach llvm.access.group metadata to the memref instructions of Block.

Definition at line 5242 of file OMPIRBuilder.cpp.

References llvm::Block, and I.

Referenced by llvm::OpenMPIRBuilder::applySimd().

checkReductionInfos()

static void checkReductionInfos ( ArrayRef< OpenMPIRBuilder::ReductionInfo >  ReductionInfos, bool  IsGPU  )

static

Definition at line 3515 of file OMPIRBuilder.cpp.

References assert().

Referenced by llvm::OpenMPIRBuilder::createReductionsGPU().

computeHeuristicUnrollFactor()

static int32_t computeHeuristicUnrollFactor ( CanonicalLoopInfo *  CLI )

static

Heuristically determine the best-performant unroll factor for CLI.

This depends on the target processor. We are re-using the same heuristics as the LoopUnrollPass.

Definition at line 5484 of file OMPIRBuilder.cpp.

References llvm::Aggressive, assert(), llvm::TargetTransformInfo::UnrollingPreferences::BEInsns, llvm::UnrollCostEstimator::canUnroll(), llvm::CodeMetrics::collectEphemeralValues(), llvm::computeUnrollCount(), llvm::TargetTransformInfo::UnrollingPreferences::Count, createTargetMachine(), llvm::dbgs(), F, FAM, llvm::TargetTransformInfo::UnrollingPreferences::Force, llvm::gatherPeelingPreferences(), llvm::gatherUnrollingPreferences(), llvm::CanonicalLoopInfo::getFunction(), llvm::CanonicalLoopInfo::getHeader(), llvm::LoopInfoBase< BlockT, LoopT >::getLoopFor(), llvm::UnrollCostEstimator::getRolledLoopSize(), I, llvm::SmallPtrSetImpl< PtrType >::insert(), LLVM_DEBUG, llvm::TargetTransformInfo::UnrollingPreferences::OptSizeThreshold, llvm::TargetTransformInfo::UnrollingPreferences::PartialOptSizeThreshold, llvm::TargetTransformInfo::UnrollingPreferences::PartialThreshold, Ptr, llvm::AnalysisManager< IRUnitT, ExtraArgTs >::registerPass(), llvm::TargetIRAnalysis::run(), llvm::AssumptionAnalysis::run(), llvm::DominatorTreeAnalysis::run(), llvm::LoopAnalysis::run(), llvm::ScalarEvolutionAnalysis::run(), llvm::TargetTransformInfo::UnrollingPreferences::Threshold, and UnrollThresholdFactor.

Referenced by llvm::OpenMPIRBuilder::unrollLoopPartial().

computeOpenMPScheduleType()

static OMPScheduleType computeOpenMPScheduleType ( ScheduleKind  ClauseKind, bool  HasChunks, bool  HasSimdModifier, bool  HasMonotonicModifier, bool  HasNonmonotonicModifier, bool  HasOrderedClause  )

static

Determine the schedule type using schedule and ordering clause arguments.

Definition at line 252 of file OMPIRBuilder.cpp.

References assert(), getOpenMPBaseScheduleType(), getOpenMPMonotonicityScheduleType(), getOpenMPOrderingScheduleType(), and isValidWorkshareLoopScheduleType().

Referenced by llvm::OpenMPIRBuilder::applyWorkshareLoop().

createFakeIntVal()

Value * createFakeIntVal	(	IRBuilderBase &	Builder,
		OpenMPIRBuilder::InsertPointTy	OuterAllocaIP,
		llvm::SmallVectorImpl< Instruction * > &	ToBeDeleted,
		OpenMPIRBuilder::InsertPointTy	InnerAllocaIP,
		const Twine &	Name = "",
		bool	AsPtr = true
	)

Definition at line 391 of file OMPIRBuilder.cpp.

References llvm::IRBuilderBase::CreateAdd(), llvm::IRBuilderBase::CreateAlloca(), llvm::IRBuilderBase::CreateLoad(), llvm::IRBuilderBase::getInt32(), llvm::IRBuilderBase::getInt32Ty(), Name, llvm::SmallVectorTemplateBase< T, bool >::push_back(), and llvm::IRBuilderBase::restoreIP().

Referenced by llvm::OpenMPIRBuilder::createTask(), llvm::OpenMPIRBuilder::createTeams(), and llvm::OpenMPIRBuilder::emitTargetTask().

createOutlinedFunction()

static Expected< Function * > createOutlinedFunction ( OpenMPIRBuilder &  OMPBuilder, IRBuilderBase &  Builder, const OpenMPIRBuilder::TargetKernelDefaultAttrs &  DefaultAttrs, StringRef  FuncName, SmallVectorImpl< Value * > &  Inputs, OpenMPIRBuilder::TargetBodyGenCallbackTy &  CBFunc, OpenMPIRBuilder::TargetGenArgAccessorsCallbackTy &  ArgAccessorFuncCB  )

static

Definition at line 6805 of file OMPIRBuilder.cpp.

References llvm::BasicBlock::begin(), llvm::OpenMPIRBuilder::Config, llvm::OpenMPIRBuilder::ConstantAllocaRaiseCandidates, llvm::convertUsersOfConstantsToInstructions(), llvm::Function::Create(), llvm::BasicBlock::Create(), llvm::IRBuilderBase::CreateRetVoid(), llvm::OpenMPIRBuilder::createTargetDeinit(), llvm::OpenMPIRBuilder::createTargetInit(), DL, llvm::OpenMPIRBuilder::emitKernelExecutionMode(), llvm::OpenMPIRBuilder::emitUsed(), llvm::SmallVectorImpl< T >::emplace_back(), llvm::OpenMPIRBuilder::TargetKernelDefaultAttrs::ExecFlags, llvm::MDNode::get(), llvm::FunctionType::get(), llvm::IRBuilderBase::getContext(), llvm::IRBuilderBase::getCurrentDebugLocation(), llvm::BasicBlock::getFirstNonPHI(), llvm::BasicBlock::getFirstNonPHIOrDbg(), llvm::Function::getFnAttribute(), llvm::IRBuilderBase::GetInsertBlock(), llvm::Type::getInt64Ty(), llvm::GlobalValue::getParent(), llvm::BasicBlock::getParent(), llvm::DILocalScope::getSubprogram(), llvm::PointerType::getUnqual(), llvm::IRBuilderBase::getVoidTy(), llvm::GlobalValue::InternalLinkage, llvm::OpenMPIRBuilderConfig::isTargetDevice(), llvm::make_early_inc_range(), llvm::make_range(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::IRBuilderBase::restoreIP(), llvm::IRBuilderBase::saveIP(), llvm::IRBuilderBase::SetCurrentDebugLocation(), llvm::IRBuilderBase::SetInsertPoint(), llvm::splitBB(), llvm::Expected< T >::takeError(), llvm::Value::users(), and llvm::zip().

Referenced by emitTargetOutlinedFunction().

createTargetLoopWorkshareCall()

static void createTargetLoopWorkshareCall ( OpenMPIRBuilder *  OMPBuilder, WorksharingLoopType  LoopType, BasicBlock *  InsertBlock, Value *  Ident, Value *  LoopBodyArg, Type *  ParallelTaskPtr, Value *  TripCount, Function &  LoopBodyFn  )

static

Definition at line 4433 of file OMPIRBuilder.cpp.

References llvm::OpenMPIRBuilder::Builder, llvm::IRBuilderBase::CreateBitCast(), llvm::IRBuilderBase::CreateCall(), llvm::IRBuilderBase::CreateZExtOrTrunc(), llvm::BasicBlock::end(), getKmpcForStaticLoopForType(), llvm::OpenMPIRBuilder::getOrCreateRuntimeFunction(), llvm::Value::getType(), llvm::OpenMPIRBuilder::M, llvm::SmallVectorTemplateBase< T, bool >::push_back(), and llvm::IRBuilderBase::restoreIP().

Referenced by workshareLoopTargetCallback().

createTargetMachine()

static std::unique_ptr< TargetMachine > createTargetMachine ( Function *  F, CodeGenOptLevel  OptLevel  )

static

Create the TargetMachine object to query the backend for optimization preferences.

Ideally, this would be passed from the front-end to the OpenMPBuilder, but e.g. Clang does not pass it to its CodeGen layer and creates it only when needed for the LLVM pass pipline. We use some default options to avoid having to pass too many settings from the frontend that probably do not matter.

Currently, TargetMachine is only used sometimes by the unrollLoopPartial method. If we are going to use TargetMachine for more purposes, especially those that are sensitive to TargetOptions, RelocModel and CodeModel, it might become be worth requiring front-ends to pass on their TargetMachine, or at least cache it between methods. Note that while fontends such as Clang have just a single main TargetMachine per translation unit, "target-cpu" and "target-features" that determine the TargetMachine are per-function and can be overrided using attribute((target("OPTIONS"))).

Definition at line 5463 of file OMPIRBuilder.cpp.

References llvm::Target::createTargetMachine(), F, llvm::TargetRegistry::lookupTarget(), and Options.

Referenced by llvm::lto::backend(), computeHeuristicUnrollFactor(), LLVMCreateTargetMachineWithOptions(), splitCodeGen(), and llvm::lto::thinBackend().

emitImplicitCast()

static llvm::Value * emitImplicitCast ( IRBuilder<> &  Builder, llvm::Value *  XRead, llvm::Value *  V  )

static

Emit an implicit cast to convert XRead to type of variable V.

Definition at line 268 of file OMPIRBuilder.cpp.

References llvm::IRBuilderBase::CreateExtractValue(), llvm::IRBuilderBase::CreateFPCast(), llvm::IRBuilderBase::CreateFPToSI(), llvm::IRBuilderBase::CreateIntCast(), llvm::IRBuilderBase::CreateSIToFP(), llvm::Value::getType(), llvm::Type::isFloatingPointTy(), llvm::Type::isIntegerTy(), and llvm::Type::isStructTy().

Referenced by llvm::OpenMPIRBuilder::createAtomicCapture(), and llvm::OpenMPIRBuilder::createAtomicRead().

emitTargetCall()

static void emitTargetCall ( OpenMPIRBuilder &  OMPBuilder, IRBuilderBase &  Builder, OpenMPIRBuilder::InsertPointTy  AllocaIP, const OpenMPIRBuilder::TargetKernelDefaultAttrs &  DefaultAttrs, const OpenMPIRBuilder::TargetKernelRuntimeAttrs &  RuntimeAttrs, Value *  IfCond, Function *  OutlinedFn, Constant *  OutlinedFnID, SmallVectorImpl< Value * > &  Args, OpenMPIRBuilder::GenMapInfoCallbackTy  GenMapInfoCB, SmallVector< llvm::OpenMPIRBuilder::DependData >  Dependencies = {}, bool  HasNoWait = false  )

static

Definition at line 7398 of file OMPIRBuilder.cpp.

Referenced by llvm::OpenMPIRBuilder::createTarget().

emitTargetOutlinedFunction()

static Error emitTargetOutlinedFunction ( OpenMPIRBuilder &  OMPBuilder, IRBuilderBase &  Builder, bool  IsOffloadEntry, TargetRegionEntryInfo &  EntryInfo, const OpenMPIRBuilder::TargetKernelDefaultAttrs &  DefaultAttrs, Function *&  OutlinedFn, Constant *&  OutlinedFnID, SmallVectorImpl< Value * > &  Inputs, OpenMPIRBuilder::TargetBodyGenCallbackTy &  CBFunc, OpenMPIRBuilder::TargetGenArgAccessorsCallbackTy &  ArgAccessorFuncCB  )

static

Definition at line 7090 of file OMPIRBuilder.cpp.

References createOutlinedFunction(), and llvm::OpenMPIRBuilder::emitTargetRegionFunction().

Referenced by llvm::OpenMPIRBuilder::createTarget().

emitTargetTaskProxyFunction()

static Function * emitTargetTaskProxyFunction ( OpenMPIRBuilder &  OMPBuilder, IRBuilderBase &  Builder, CallInst *  StaleCI  )

static

Create an entry point for a target task with the following.

It'll have the following signature void .omp_target_task_proxy_func(i32 thread.id, ptr task) This function is called from emitTargetTask once the code to launch the target kernel has been outlined already.

Definition at line 7010 of file OMPIRBuilder.cpp.

References llvm::CallBase::arg_size(), assert(), llvm::Function::Create(), llvm::BasicBlock::Create(), llvm::IRBuilderBase::CreateAlloca(), llvm::IRBuilderBase::CreateCall(), llvm::IRBuilderBase::CreateLoad(), llvm::IRBuilderBase::CreateMemCpy(), llvm::IRBuilderBase::CreateRetVoid(), llvm::IRBuilderBase::CreateStructGEP(), llvm::FunctionType::get(), llvm::AllocaInst::getAlign(), llvm::CallBase::getArgOperand(), llvm::CallBase::getCalledFunction(), llvm::IRBuilderBase::getContext(), llvm::IRBuilderBase::GetInsertBlock(), llvm::Type::getInt32Ty(), llvm::IRBuilderBase::getInt64(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::BasicBlock::getModule(), llvm::ilist_detail::node_parent_access< NodeTy, ParentTy >::getParent(), llvm::Value::getPointerAlignment(), llvm::PointerType::getUnqual(), llvm::IRBuilderBase::getVoidTy(), llvm::GlobalValue::InternalLinkage, llvm::OpenMPIRBuilder::M, and llvm::IRBuilderBase::SetInsertPoint().

Referenced by llvm::OpenMPIRBuilder::emitTargetTask().

emitTaskDependencies()

static Value * emitTaskDependencies ( OpenMPIRBuilder &  OMPBuilder, const SmallVectorImpl< OpenMPIRBuilder::DependData > &  Dependencies  )

static

Definition at line 1814 of file OMPIRBuilder.cpp.

References Addr, llvm::sampleprof::Base, llvm::OpenMPIRBuilder::Builder, llvm::IRBuilderBase::CreateAlloca(), llvm::IRBuilderBase::CreateConstInBoundsGEP2_64(), llvm::IRBuilderBase::CreatePtrToInt(), llvm::IRBuilderBase::CreateStore(), llvm::IRBuilderBase::CreateStructGEP(), llvm::SmallVectorBase< Size_T >::empty(), llvm::enumerate(), llvm::omp::Flags, llvm::ArrayType::get(), llvm::IRBuilderBase::InsertPoint::getBlock(), llvm::Function::getEntryBlock(), llvm::IRBuilderBase::getInt64(), llvm::IRBuilderBase::getInt64Ty(), llvm::IRBuilderBase::getInt8Ty(), llvm::BasicBlock::getParent(), llvm::BasicBlock::getTerminator(), llvm::OpenMPIRBuilder::M, llvm::IRBuilderBase::restoreIP(), llvm::IRBuilderBase::saveIP(), llvm::IRBuilderBase::SetInsertPoint(), llvm::SmallVectorBase< Size_T >::size(), and Size.

Referenced by llvm::OpenMPIRBuilder::emitTargetTask().

getFreshReductionFunc()

static Function * getFreshReductionFunc ( Module &  M )

static

Definition at line 3721 of file OMPIRBuilder.cpp.

References llvm::Function::Create(), llvm::FunctionType::get(), llvm::PointerType::getUnqual(), llvm::Type::getVoidTy(), and llvm::GlobalValue::InternalLinkage.

Referenced by llvm::OpenMPIRBuilder::createReductions().

getGridValue()

static const omp::GV & getGridValue ( const Triple &  T, Function *  Kernel  )

static

Definition at line 152 of file OMPIRBuilder.cpp.

References llvm::StringRef::count(), llvm::Function::getFnAttribute(), llvm::Attribute::getValueAsString(), llvm_unreachable, and llvm::omp::NVPTXGridValues.

Referenced by llvm::OpenMPIRBuilder::createReductionsGPU(), and llvm::OpenMPIRBuilder::createTargetInit().

getInsertPointAfterInstr()

static OpenMPIRBuilder::InsertPointTy getInsertPointAfterInstr ( Instruction *  I )

static

Definition at line 2348 of file OMPIRBuilder.cpp.

References I, and IT.

getKmpcForDynamicFiniForType()

static FunctionCallee getKmpcForDynamicFiniForType ( Type *  Ty, Module &  M, OpenMPIRBuilder &  OMPBuilder  )

static

Returns an LLVM function to call for finalizing the dynamic loop using depending on type.

Only i32 and i64 are supported by the runtime. Always interpret integers as unsigned similarly to CanonicalLoopInfo.

Definition at line 4711 of file OMPIRBuilder.cpp.

References llvm::Type::getIntegerBitWidth(), llvm::OpenMPIRBuilder::getOrCreateRuntimeFunction(), and llvm_unreachable.

getKmpcForDynamicInitForType()

static FunctionCallee getKmpcForDynamicInitForType ( Type *  Ty, Module &  M, OpenMPIRBuilder &  OMPBuilder  )

static

Returns an LLVM function to call for initializing loop bounds using OpenMP dynamic scheduling depending on type.

Only i32 and i64 are supported by the runtime. Always interpret integers as unsigned similarly to CanonicalLoopInfo.

Definition at line 4680 of file OMPIRBuilder.cpp.

References llvm::Type::getIntegerBitWidth(), llvm::OpenMPIRBuilder::getOrCreateRuntimeFunction(), and llvm_unreachable.

getKmpcForDynamicNextForType()

static FunctionCallee getKmpcForDynamicNextForType ( Type *  Ty, Module &  M, OpenMPIRBuilder &  OMPBuilder  )

static

Returns an LLVM function to call for updating the next loop using OpenMP dynamic scheduling depending on type.

Only i32 and i64 are supported by the runtime. Always interpret integers as unsigned similarly to CanonicalLoopInfo.

Definition at line 4696 of file OMPIRBuilder.cpp.

References llvm::Type::getIntegerBitWidth(), llvm::OpenMPIRBuilder::getOrCreateRuntimeFunction(), and llvm_unreachable.

getKmpcForStaticInitForType()

static FunctionCallee getKmpcForStaticInitForType ( Type *  Ty, Module &  M, OpenMPIRBuilder &  OMPBuilder  )

static

Definition at line 4130 of file OMPIRBuilder.cpp.

References llvm::Type::getIntegerBitWidth(), llvm::OpenMPIRBuilder::getOrCreateRuntimeFunction(), and llvm_unreachable.

getKmpcForStaticLoopForType()

static FunctionCallee getKmpcForStaticLoopForType ( Type *  Ty, OpenMPIRBuilder *  OMPBuilder, WorksharingLoopType  LoopType  )

static

Definition at line 4395 of file OMPIRBuilder.cpp.

References llvm::Type::getIntegerBitWidth(), llvm::OpenMPIRBuilder::getOrCreateRuntimeFunction(), llvm_unreachable, and llvm::OpenMPIRBuilder::M.

Referenced by createTargetLoopWorkshareCall().

getNVPTXMDNode()

static MDNode * getNVPTXMDNode ( Function &  Kernel, StringRef  Name  )

static

Definition at line 6363 of file OMPIRBuilder.cpp.

References llvm::DWARFExpression::Operation::getNumOperands(), llvm::GlobalValue::getParent(), Name, and llvm::NamedMDNode::operands().

Referenced by llvm::OpenMPIRBuilder::readThreadBoundsForKernel(), and updateNVPTXMetadata().

getOpenMPBaseScheduleType()

static OMPScheduleType getOpenMPBaseScheduleType ( llvm::omp::ScheduleKind  ClauseKind, bool  HasChunks, bool  HasSimdModifier  )

static

Determine which scheduling algorithm to use, determined from schedule clause arguments.

Definition at line 168 of file OMPIRBuilder.cpp.

References llvm::omp::BaseAuto, and llvm_unreachable.

Referenced by computeOpenMPScheduleType().

getOpenMPMonotonicityScheduleType()

static OMPScheduleType getOpenMPMonotonicityScheduleType ( OMPScheduleType  ScheduleType, bool  HasSimdModifier, bool  HasMonotonic, bool  HasNonmonotonic, bool  HasOrderedClause  )

static

Adds monotonicity modifier flags to schedule type.

Definition at line 216 of file OMPIRBuilder.cpp.

References assert(), and llvm::omp::ModifierMask.

Referenced by computeOpenMPScheduleType().

getOpenMPOrderingScheduleType()

static OMPScheduleType getOpenMPOrderingScheduleType ( OMPScheduleType  BaseScheduleType, bool  HasOrderedClause  )

static

Adds ordering modifier flags to schedule type.

Definition at line 192 of file OMPIRBuilder.cpp.

References assert().

Referenced by computeOpenMPScheduleType().

hostParallelCallback()

static void hostParallelCallback ( OpenMPIRBuilder *  OMPIRBuilder, Function &  OutlinedFn, Function *  OuterFn, Value *  Ident, Value *  IfCondition, Instruction *  PrivTID, AllocaInst *  PrivTIDAddr, const SmallVector< Instruction *, 4 > &  ToBeDeleted  )

static

Definition at line 1344 of file OMPIRBuilder.cpp.

References llvm::Function::addFnAttr(), llvm::Function::addParamAttr(), llvm::SmallVectorImpl< T >::append(), llvm::Function::arg_begin(), llvm::CallBase::arg_begin(), llvm::CallBase::arg_end(), llvm::Function::arg_size(), assert(), llvm::SmallVectorTemplateCommon< T, typename >::back(), llvm::OpenMPIRBuilder::Builder, Cond, llvm::IRBuilderBase::CreateBitCast(), llvm::IRBuilderBase::CreateCall(), llvm::MDBuilder::createCallbackEncoding(), llvm::IRBuilderBase::CreateLoad(), llvm::IRBuilderBase::CreateSExtOrTrunc(), llvm::IRBuilderBase::CreateStore(), llvm::dbgs(), llvm::Instruction::eraseFromParent(), F, llvm::MDNode::get(), llvm::FunctionCallee::getCallee(), llvm::IRBuilderBase::GetInsertBlock(), llvm::IRBuilderBase::getInt32(), llvm::Constant::getNullValue(), llvm::OpenMPIRBuilder::getOrCreateRuntimeFunctionPtr(), llvm::ilist_detail::node_parent_access< NodeTy, ParentTy >::getParent(), llvm::BasicBlock::getParent(), I, LLVM_DEBUG, llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::IRBuilderBase::SetInsertPoint(), and llvm::Value::user_back().

Referenced by llvm::OpenMPIRBuilder::createParallel().

isConflictIP()

static bool isConflictIP ( IRBuilder<>::InsertPoint  IP1, IRBuilder<>::InsertPoint  IP2  )

static

Return whether IP1 and IP2 are ambiguous, i.e.

that inserting instructions at position IP1 may change the meaning of IP2 or vice-versa. This is because an InsertPoint stores the instruction before something is inserted. For instance, if both point to the same instruction, two IRBuilders alternating creating instruction will cause the instructions to be interleaved.

Definition at line 86 of file OMPIRBuilder.cpp.

Referenced by llvm::OpenMPIRBuilder::createAtomicUpdate(), llvm::OpenMPIRBuilder::createParallel(), and llvm::OpenMPIRBuilder::createSections().

isValidWorkshareLoopScheduleType()

static bool isValidWorkshareLoopScheduleType ( OMPScheduleType  SchedType )

static

Definition at line 93 of file OMPIRBuilder.cpp.

Referenced by computeOpenMPScheduleType().

raiseUserConstantDataAllocasToEntryBlock()

static void raiseUserConstantDataAllocasToEntryBlock ( IRBuilderBase &  Builder, Function *  Function  )

static

Definition at line 678 of file OMPIRBuilder.cpp.

References llvm::Function::begin(), llvm::Block, llvm::Function::end(), llvm::AllocaInst::getArraySize(), llvm::Function::getEntryBlock(), llvm::BasicBlock::getFirstNonPHI(), and llvm::Instruction::moveBeforePreserving().

Referenced by llvm::OpenMPIRBuilder::finalize().

redirectAllPredecessorsTo()

static void redirectAllPredecessorsTo ( BasicBlock *  OldTarget, BasicBlock *  NewTarget, DebugLoc  DL  )

static

Redirect all edges that branch to OldTarget to NewTarget.

That is, after this OldTarget will be orphaned.

Definition at line 4856 of file OMPIRBuilder.cpp.

References DL, llvm::make_early_inc_range(), llvm::predecessors(), and redirectTo().

Referenced by llvm::OpenMPIRBuilder::collapseLoops(), and llvm::OpenMPIRBuilder::tileLoops().

redirectTo()

static void redirectTo ( BasicBlock *  Source, BasicBlock *  Target, DebugLoc  DL  )

static

Make Source branch to Target.

Handles two situations:

• Source already has an unconditional branch.
• Source is a degenerate block (no terminator because the BB is the current head of the IR construction).

Definition at line 300 of file OMPIRBuilder.cpp.

References assert(), llvm::BranchInst::Create(), DL, and llvm::BasicBlock::removePredecessor().

Referenced by llvm::OpenMPIRBuilder::collapseLoops(), redirectAllPredecessorsTo(), and llvm::OpenMPIRBuilder::tileLoops().

removeUnusedBlocksFromParent()

static void removeUnusedBlocksFromParent ( ArrayRef< BasicBlock * >  BBs )

static

Determine which blocks in BBs are reachable from outside and remove the ones that are not reachable from the function.

Definition at line 4864 of file OMPIRBuilder.cpp.

References llvm::ArrayRef< T >::begin(), llvm::DeleteDeadBlocks(), and llvm::ArrayRef< T >::end().

Referenced by llvm::OpenMPIRBuilder::collapseLoops(), and llvm::OpenMPIRBuilder::tileLoops().

targetParallelCallback()

static void targetParallelCallback ( OpenMPIRBuilder *  OMPIRBuilder, Function &  OutlinedFn, Function *  OuterFn, BasicBlock *  OuterAllocaBB, Value *  Ident, Value *  IfCondition, Value *  NumThreads, Instruction *  PrivTID, AllocaInst *  PrivTIDAddr, Value *  ThreadID, const SmallVector< Instruction *, 4 > &  ToBeDeleted  )

static

Definition at line 1255 of file OMPIRBuilder.cpp.

References llvm::Function::addFnAttr(), llvm::Function::addParamAttr(), llvm::Function::arg_begin(), llvm::CallBase::arg_begin(), llvm::Function::arg_size(), assert(), llvm::OpenMPIRBuilder::Builder, Cond, llvm::IRBuilderBase::CreateAlloca(), llvm::IRBuilderBase::CreateBitCast(), llvm::IRBuilderBase::CreateCall(), llvm::IRBuilderBase::CreateConstInBoundsGEP2_64(), llvm::IRBuilderBase::CreateLoad(), llvm::IRBuilderBase::CreatePointerCast(), llvm::IRBuilderBase::CreateSExtOrTrunc(), llvm::IRBuilderBase::CreateStore(), llvm::dbgs(), llvm::Instruction::eraseFromParent(), llvm::ArrayType::get(), llvm::AllocaInst::getAddressSpace(), llvm::BasicBlock::getFirstInsertionPt(), llvm::IRBuilderBase::GetInsertBlock(), llvm::IRBuilderBase::getInt32(), llvm::IRBuilderBase::getInt64(), llvm::Constant::getNullValue(), llvm::OpenMPIRBuilder::getOrCreateRuntimeFunctionPtr(), llvm::ilist_detail::node_parent_access< NodeTy, ParentTy >::getParent(), llvm::BasicBlock::getParent(), I, Idx, LLVM_DEBUG, llvm::IRBuilderBase::restoreIP(), llvm::IRBuilderBase::saveIP(), llvm::IRBuilderBase::SetInsertPoint(), and llvm::Value::user_back().

Referenced by llvm::OpenMPIRBuilder::createParallel().

updateNVPTXMetadata()

static void updateNVPTXMetadata ( Function &  Kernel, StringRef  Name, int32_t  Value, bool  Min  )

static

Definition at line 6380 of file OMPIRBuilder.cpp.

References llvm::NamedMDNode::addOperand(), llvm::ConstantAsMetadata::get(), llvm::MDNode::get(), llvm::MDString::get(), llvm::Function::getContext(), llvm::Type::getInt32Ty(), getNVPTXMDNode(), llvm::MDNode::getOperand(), llvm::GlobalValue::getParent(), Name, and llvm::MDNode::replaceOperandWith().

Referenced by llvm::OpenMPIRBuilder::writeTeamsForKernel(), and llvm::OpenMPIRBuilder::writeThreadBoundsForKernel().

workshareLoopTargetCallback()

static void workshareLoopTargetCallback ( OpenMPIRBuilder *  OMPIRBuilder, CanonicalLoopInfo *  CLI, Value *  Ident, Function &  OutlinedFn, Type *  ParallelTaskPtr, const SmallVector< Instruction *, 4 > &  ToBeDeleted, WorksharingLoopType  LoopType  )

static

Definition at line 4468 of file OMPIRBuilder.cpp.

References llvm::CallBase::arg_size(), assert(), llvm::BasicBlock::begin(), llvm::OpenMPIRBuilder::Builder, llvm::OpenMPIRBuilder::OutlineInfo::collectBlocks(), llvm::IRBuilderBase::CreateBr(), createTargetLoopWorkshareCall(), llvm::DeleteDeadBlocks(), llvm::BasicBlock::end(), llvm::OpenMPIRBuilder::OutlineInfo::EntryBB, llvm::Instruction::eraseFromParent(), llvm::OpenMPIRBuilder::OutlineInfo::ExitBB, llvm::CallBase::getArgOperand(), llvm::CanonicalLoopInfo::getBody(), llvm::Instruction::getDebugLoc(), llvm::CanonicalLoopInfo::getExit(), llvm::CanonicalLoopInfo::getHeader(), llvm::Constant::getNullValue(), llvm::ilist_detail::node_parent_access< NodeTy, ParentTy >::getParent(), llvm::CanonicalLoopInfo::getPreheader(), llvm::IRBuilderBase::getPtrTy(), llvm::BasicBlock::getTerminator(), llvm::CanonicalLoopInfo::getTripCount(), llvm::Value::getUniqueUndroppableUser(), llvm::CanonicalLoopInfo::invalidate(), llvm::IRBuilderBase::restoreIP(), llvm::IRBuilderBase::SetCurrentDebugLocation(), and llvm::BasicBlock::splice().

Variable Documentation

OptimisticAttributes

cl::opt< bool > OptimisticAttributes("openmp-ir-builder-optimistic-attributes", cl::Hidden, cl::desc("Use optimistic attributes describing " "'as-if' properties of runtime calls."), cl::init(false)) ( "openmp-ir-builder-optimistic-attributes"  , cl::Hidden  , cl::desc("Use optimistic attributes describing " "'as-if' properties of runtime calls.")  , cl::init(false)    )

static

UnrollThresholdFactor

cl::opt< double > UnrollThresholdFactor("openmp-ir-builder-unroll-threshold-factor", cl::Hidden, cl::desc("Factor for the unroll threshold to account for code " "simplifications still taking place"), cl::init(1.5)) ( "openmp-ir-builder-unroll-threshold-factor"  , cl::Hidden  , cl::desc("Factor for the unroll threshold to account for code " "simplifications still taking place")  , cl::init(1.5)    )

static

Referenced by computeHeuristicUnrollFactor().