LLVM 19.0.0git
Macros | Functions | Variables
AtomicExpandPass.cpp File Reference
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/STLFunctionalExtras.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Analysis/InstSimplifyFolder.h"
#include "llvm/Analysis/OptimizationRemarkEmitter.h"
#include "llvm/CodeGen/AtomicExpand.h"
#include "llvm/CodeGen/AtomicExpandUtils.h"
#include "llvm/CodeGen/RuntimeLibcalls.h"
#include "llvm/CodeGen/TargetLowering.h"
#include "llvm/CodeGen/TargetPassConfig.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/Constant.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/InstIterator.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/MDBuilder.h"
#include "llvm/IR/MemoryModelRelaxationAnnotations.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Type.h"
#include "llvm/IR/User.h"
#include "llvm/IR/Value.h"
#include "llvm/InitializePasses.h"
#include "llvm/Pass.h"
#include "llvm/Support/AtomicOrdering.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Transforms/Utils/LowerAtomic.h"
#include <cassert>
#include <cstdint>
#include <iterator>

Go to the source code of this file.


#define DEBUG_TYPE   "atomic-expand"


 INITIALIZE_PASS_BEGIN (AtomicExpandLegacy, DEBUG_TYPE, "Expand Atomic instructions", false, false) INITIALIZE_PASS_END(AtomicExpandLegacy
Expand Atomic static false unsigned getAtomicOpSize (LoadInst *LI)
static unsigned getAtomicOpSize (StoreInst *SI)
static unsigned getAtomicOpSize (AtomicRMWInst *RMWI)
static unsigned getAtomicOpSize (AtomicCmpXchgInst *CASI)
template<typename Inst >
static bool atomicSizeSupported (const TargetLowering *TLI, Inst *I)
static void createCmpXchgInstFun (IRBuilderBase &Builder, Value *Addr, Value *Loaded, Value *NewVal, Align AddrAlign, AtomicOrdering MemOpOrder, SyncScope::ID SSID, Value *&Success, Value *&NewLoaded)
static PartwordMaskValues createMaskInstrs (IRBuilderBase &Builder, Instruction *I, Type *ValueType, Value *Addr, Align AddrAlign, unsigned MinWordSize)
 This is a helper function which builds instructions to provide values necessary for partword atomic operations.
static ValueextractMaskedValue (IRBuilderBase &Builder, Value *WideWord, const PartwordMaskValues &PMV)
static ValueinsertMaskedValue (IRBuilderBase &Builder, Value *WideWord, Value *Updated, const PartwordMaskValues &PMV)
static ValueperformMaskedAtomicOp (AtomicRMWInst::BinOp Op, IRBuilderBase &Builder, Value *Loaded, Value *Shifted_Inc, Value *Inc, const PartwordMaskValues &PMV)
 Emit IR to implement a masked version of a given atomicrmw operation.
static void copyMetadataForAtomic (Instruction &Dest, const Instruction &Source)
 Copy metadata that's safe to preserve when widening atomics.
static bool canUseSizedAtomicCall (unsigned Size, Align Alignment, const DataLayout &DL)
static ArrayRef< RTLIB::LibcallGetRMWLibcall (AtomicRMWInst::BinOp Op)


Expand Atomic instructions
Expand Atomic false

Macro Definition Documentation


#define DEBUG_TYPE   "atomic-expand"

Definition at line 61 of file AtomicExpandPass.cpp.

Function Documentation

◆ atomicSizeSupported()

template<typename Inst >
static bool atomicSizeSupported ( const TargetLowering TLI,
Inst *  I 

◆ canUseSizedAtomicCall()

static bool canUseSizedAtomicCall ( unsigned  Size,
Align  Alignment,
const DataLayout DL 

Definition at line 1673 of file AtomicExpandPass.cpp.

References DL, and Size.

◆ copyMetadataForAtomic()

static void copyMetadataForAtomic ( Instruction Dest,
const Instruction Source 

Copy metadata that's safe to preserve when widening atomics.

Definition at line 942 of file AtomicExpandPass.cpp.

References llvm::Value::getContext(), llvm::LLVMContext::getMDKindID(), N, and llvm::Instruction::setMetadata().

◆ createCmpXchgInstFun()

static void createCmpXchgInstFun ( IRBuilderBase Builder,
Value Addr,
Value Loaded,
Value NewVal,
Align  AddrAlign,
AtomicOrdering  MemOpOrder,
SyncScope::ID  SSID,
Value *&  Success,
Value *&  NewLoaded 

◆ createMaskInstrs()

static PartwordMaskValues createMaskInstrs ( IRBuilderBase Builder,
Instruction I,
Type ValueType,
Value Addr,
Align  AddrAlign,
unsigned  MinWordSize 

This is a helper function which builds instructions to provide values necessary for partword atomic operations.

It takes an incoming address, Addr, and ValueType, and constructs the address, shift-amounts and masks needed to work with a larger value of size WordSize.

AlignedAddr: Addr rounded down to a multiple of WordSize

ShiftAmt: Number of bits to right-shift a WordSize value loaded from AlignAddr for it to have the same value as if ValueType was loaded from Addr.

Mask: Value to mask with the value loaded from AlignAddr to include only the part that would've been loaded from Addr.

Inv_Mask: The inverse of Mask.

Definition at line 737 of file AtomicExpandPass.cpp.

References Addr, assert(), llvm::IRBuilderBase::CreateAnd(), llvm::IRBuilderBase::CreateIntrinsic(), llvm::IRBuilderBase::CreateNot(), llvm::IRBuilderBase::CreatePtrToInt(), llvm::IRBuilderBase::CreateShl(), llvm::IRBuilderBase::CreateTrunc(), llvm::IRBuilderBase::CreateXor(), DL, llvm::Type::getIntNTy(), llvm::Constant::getNullValue(), and I.

◆ extractMaskedValue()

static Value * extractMaskedValue ( IRBuilderBase Builder,
Value WideWord,
const PartwordMaskValues &  PMV 

◆ getAtomicOpSize() [1/4]

static unsigned getAtomicOpSize ( AtomicCmpXchgInst CASI)

◆ getAtomicOpSize() [2/4]

static unsigned getAtomicOpSize ( AtomicRMWInst RMWI)

◆ getAtomicOpSize() [3/4]

Expand Atomic static false unsigned getAtomicOpSize ( LoadInst LI)

Definition at line 175 of file AtomicExpandPass.cpp.

References DL.

Referenced by atomicSizeSupported().

◆ getAtomicOpSize() [4/4]

static unsigned getAtomicOpSize ( StoreInst SI)

Definition at line 180 of file AtomicExpandPass.cpp.

References DL.

◆ GetRMWLibcall()

static ArrayRef< RTLIB::Libcall > GetRMWLibcall ( AtomicRMWInst::BinOp  Op)


INITIALIZE_PASS_BEGIN ( AtomicExpandLegacy  ,
"Expand Atomic instructions"  ,
false  ,

◆ insertMaskedValue()

static Value * insertMaskedValue ( IRBuilderBase Builder,
Value WideWord,
Value Updated,
const PartwordMaskValues &  PMV 

◆ performMaskedAtomicOp()

static Value * performMaskedAtomicOp ( AtomicRMWInst::BinOp  Op,
IRBuilderBase Builder,
Value Loaded,
Value Shifted_Inc,
Value Inc,
const PartwordMaskValues &  PMV 

Variable Documentation



Definition at line 171 of file AtomicExpandPass.cpp.

◆ false

Expand Atomic false

Definition at line 172 of file AtomicExpandPass.cpp.

◆ instructions

Expand Atomic instructions

Definition at line 172 of file AtomicExpandPass.cpp.

Referenced by addBoundsChecking(), llvm::X86TTIImpl::areInlineCompatible(), bitTrackingDCE(), llvm::coro::buildCoroutineFrame(), llvm::coro::Shape::buildFrom(), llvm::Function::callsFunctionThatReturnsTwice(), canTRE(), checkFunctionMemoryAccess(), collectDbgVariableIntrinsics(), collectPreserveStaticOffsetCalls(), computeUsesMSVCFloatingPoint(), convertAnnotation2Metadata(), createSCCNodeSet(), doRematerializations(), eliminateDeadCode(), eraseDebugIntrinsicsWithNonLocalRefs(), explicifyGuards(), fixupDebugInfoPostExtraction(), functionWillReturn(), getEdgeKind(), llvm::GenericUniformityAnalysisImpl< ContextT >::initialize(), INITIALIZE_PASS(), llvm::MLInlineAdvisor::MLInlineAdvisor(), llvm::InstDeleterIRStrategy::mutate(), llvm::StackSafetyGlobalInfo::print(), llvm::ScalarEvolution::print(), processDbgDeclares(), removeTailCallAttribute(), llvm::replaceCreatedSSACopys(), rescheduleLexographically(), llvm::AliasSetsPrinterPass::run(), llvm::MemDerefPrinterPass::run(), llvm::StackLifetimePrinterPass::run(), llvm::KCFIPass::run(), llvm::PAEvalPass::run(), llvm::AssumeBuilderPass::run(), llvm::AMDGPULowerKernelAttributesPass::run(), llvm::DSEPass::run(), llvm::InlinerPass::run(), llvm::DevirtSCCRepeatedPass::run(), llvm::ModuleInlinerPass::run(), llvm::MustBeExecutedContextPrinterPass::run(), runImpl(), runNVVMIntrRange(), llvm::RewriteStatepointsForGC::runOnFunction(), runPass(), sinkLifetimeStartMarkers(), stripDeadDebugInfoImpl(), stripGCRelocates(), stripNonValidDataFromBody(), stripTBAA(), and updateCGAndAnalysisManagerForPass().