LegalizerHelper.cpp File Reference

#include "llvm/CodeGen/GlobalISel/LegalizerHelper.h"
#include "llvm/CodeGen/GlobalISel/CallLowering.h"
#include "llvm/CodeGen/GlobalISel/GISelChangeObserver.h"
#include "llvm/CodeGen/GlobalISel/LegalizerInfo.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/TargetFrameLowering.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/CodeGen/TargetLowering.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"

Include dependency graph for LegalizerHelper.cpp:

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Macros
#define	DEBUG_TYPE   "legalizer"

Functions
static std::pair< int, int >	getNarrowTypeBreakDown (LLT OrigTy, LLT NarrowTy, LLT &LeftoverTy)
	Try to break down OrigTy into NarrowTy sized pieces. More...
static LLT	getGCDType (LLT OrigTy, LLT TargetTy)
static RTLIB::Libcall	getRTLibDesc (unsigned Opcode, unsigned Size)
static bool	isLibCallInTailPosition (MachineInstr &MI)
	True if an instruction is in tail position in its caller. More...
static LegalizerHelper::LegalizeResult	simpleLibcall (MachineInstr &MI, MachineIRBuilder &MIRBuilder, unsigned Size, Type *OpType)
static RTLIB::Libcall	getConvRTLibDesc (unsigned Opcode, Type *ToType, Type *FromType)
static LegalizerHelper::LegalizeResult	conversionLibcall (MachineInstr &MI, MachineIRBuilder &MIRBuilder, Type *ToType, Type *FromType)
static CmpInst::Predicate	minMaxToCompare (unsigned Opc)

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "legalizer"

Definition at line 28 of file LegalizerHelper.cpp.

Function Documentation

conversionLibcall()

static LegalizerHelper::LegalizeResult conversionLibcall ( MachineInstr &  MI, MachineIRBuilder &  MIRBuilder, Type *  ToType, Type *  FromType  )

static

Definition at line 482 of file LegalizerHelper.cpp.

References llvm::createLibcall(), getConvRTLibDesc(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), and llvm::MachineOperand::getReg().

Referenced by llvm::LegalizerHelper::libcall().

getConvRTLibDesc()

static RTLIB::Libcall getConvRTLibDesc ( unsigned  Opcode, Type *  ToType, Type *  FromType  )

static

Definition at line 459 of file LegalizerHelper.cpp.

References llvm::RTLIB::getFPEXT(), llvm::RTLIB::getFPROUND(), llvm::RTLIB::getFPTOSINT(), llvm::RTLIB::getFPTOUINT(), llvm::RTLIB::getSINTTOFP(), llvm::RTLIB::getUINTTOFP(), llvm::MVT::getVT(), and llvm_unreachable.

Referenced by conversionLibcall().

getGCDType()

static LLT getGCDType ( LLT  OrigTy, LLT  TargetTy  )

static

Definition at line 175 of file LegalizerHelper.cpp.

References assert(), llvm::MachineIRBuilder::buildBuildVector(), llvm::MachineIRBuilder::buildConcatVectors(), llvm::MachineIRBuilder::buildInsert(), llvm::MachineIRBuilder::buildMerge(), llvm::MachineIRBuilder::buildUndef(), llvm::MachineRegisterInfo::createGenericVirtualRegister(), E, llvm::ArrayRef< T >::empty(), llvm::LLT::getElementType(), llvm::LLT::getNumElements(), llvm::LLT::getSizeInBits(), llvm::greatestCommonDivisor(), I, llvm::LLT::isValid(), llvm::LLT::isVector(), llvm::LegalizerHelper::MIRBuilder, llvm::LLT::scalar(), llvm::LLT::scalarOrVector(), and llvm::ArrayRef< T >::size().

Referenced by llvm::LegalizerHelper::fewerElementsVectorUnmergeValues().

getNarrowTypeBreakDown()

static std::pair<int, int> getNarrowTypeBreakDown ( LLT  OrigTy, LLT  NarrowTy, LLT &  LeftoverTy  )

static

Try to break down OrigTy into NarrowTy sized pieces.

Returns the number of NarrowTy elements needed to reconstruct OrigTy, with any leftover piece as type LeftoverTy

Returns -1 in the first element of the pair if the breakdown is not satisfiable.

Definition at line 41 of file LegalizerHelper.cpp.

References assert(), llvm::LLT::getScalarSizeInBits(), llvm::LLT::getSizeInBits(), llvm::LLT::isValid(), llvm::LLT::isVector(), llvm::LLT::scalar(), llvm::LLT::scalarOrVector(), and Size.

Referenced by llvm::LegalizerHelper::fewerElementsVectorMultiEltType(), llvm::LegalizerHelper::fewerElementsVectorPhi(), and llvm::LegalizerHelper::reduceLoadStoreWidth().

getRTLibDesc()

static RTLIB::Libcall getRTLibDesc ( unsigned  Opcode, unsigned  Size  )

static

Definition at line 240 of file LegalizerHelper.cpp.

References assert(), and llvm_unreachable.

Referenced by simpleLibcall().

isLibCallInTailPosition()

static bool isLibCallInTailPosition ( MachineInstr &  MI )

static

True if an instruction is in tail position in its caller.

Intended for legalizing libcalls as tail calls when possible.

Definition at line 332 of file LegalizerHelper.cpp.

References F(), llvm::Function::getAttributes(), llvm::MachineFunction::getFunction(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::MachineInstr::getMF(), llvm::ilist_node_with_parent< NodeTy, ParentTy, Options >::getNextNode(), llvm::MachineBasicBlock::getParent(), llvm::MachineInstr::getParent(), llvm::MachineFunction::getSubtarget(), llvm::AttributeList::hasAttribute(), llvm::MachineInstr::isReturn(), llvm::HexagonInstrInfo::isTailCall(), llvm::NoAlias, llvm::AttributeList::ReturnIndex, and TII.

Referenced by llvm::createMemLibcall().

minMaxToCompare()

static CmpInst::Predicate minMaxToCompare ( unsigned  Opc )

static

Definition at line 3921 of file LegalizerHelper.cpp.

References llvm::CmpInst::ICMP_SGT, llvm::CmpInst::ICMP_SLT, llvm::CmpInst::ICMP_UGT, llvm::CmpInst::ICMP_ULT, and llvm_unreachable.

Referenced by llvm::LegalizerHelper::lowerMinMax().

simpleLibcall()

static LegalizerHelper::LegalizeResult simpleLibcall ( MachineInstr &  MI, MachineIRBuilder &  MIRBuilder, unsigned  Size, Type *  OpType  )

static

Definition at line 380 of file LegalizerHelper.cpp.

References llvm::AMDGPU::HSAMD::Kernel::Key::Args, llvm::createLibcall(), llvm::MachineInstr::getNumOperands(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), getRTLibDesc(), and Size.

Referenced by llvm::LegalizerHelper::libcall().