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LLVM
4.0.0
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#include <LegalizerHelper.h>
Public Types | |
| enum | LegalizeResult { AlreadyLegal, Legalized, UnableToLegalize } |
Public Member Functions | |
| LegalizerHelper (MachineFunction &MF) | |
| LegalizeResult | legalizeInstrStep (MachineInstr &MI, const LegalizerInfo &LegalizerInfo) |
Replace MI by a sequence of legal instructions that can implement the same operation. More... | |
| LegalizeResult | legalizeInstr (MachineInstr &MI, const LegalizerInfo &LegalizerInfo) |
| LegalizeResult | libcall (MachineInstr &MI) |
| Legalize an instruction by emiting a runtime library call instead. More... | |
| LegalizeResult | narrowScalar (MachineInstr &MI, unsigned TypeIdx, LLT NarrowTy) |
| Legalize an instruction by reducing the width of the underlying scalar type. More... | |
| LegalizeResult | widenScalar (MachineInstr &MI, unsigned TypeIdx, LLT WideTy) |
| Legalize an instruction by performing the operation on a wider scalar type (for example a 16-bit addition can be safely performed at 32-bits precision, ignoring the unused bits). More... | |
| LegalizeResult | lower (MachineInstr &MI, unsigned TypeIdx, LLT Ty) |
| Legalize an instruction by splitting it into simpler parts, hopefully understood by the target. More... | |
| LegalizeResult | fewerElementsVector (MachineInstr &MI, unsigned TypeIdx, LLT NarrowTy) |
| Legalize a vector instruction by splitting into multiple components, each acting on the same scalar type as the original but with fewer elements. More... | |
| LegalizeResult | moreElementsVector (MachineInstr &MI, unsigned TypeIdx, LLT WideTy) |
| Legalize a vector instruction by increasing the number of vector elements involved and ignoring the added elements later. More... | |
Definition at line 34 of file LegalizerHelper.h.
| Enumerator | |
|---|---|
| AlreadyLegal |
Instruction was already legal and no change was made to the MachineFunction. |
| Legalized |
Instruction has been legalized and the MachineFunction changed. |
| UnableToLegalize |
Some kind of error has occurred and we could not legalize this instruction. |
Definition at line 36 of file LegalizerHelper.h.
| LegalizerHelper::LegalizerHelper | ( | MachineFunction & | MF | ) |
Definition at line 31 of file LegalizerHelper.cpp.
References llvm::MachineIRBuilder::setMF().
| LegalizerHelper::LegalizeResult LegalizerHelper::fewerElementsVector | ( | MachineInstr & | MI, |
| unsigned | TypeIdx, | ||
| LLT | NarrowTy | ||
| ) |
Legalize a vector instruction by splitting into multiple components, each acting on the same scalar type as the original but with fewer elements.
Definition at line 322 of file LegalizerHelper.cpp.
References llvm::MachineIRBuilder::buildAdd(), llvm::MachineIRBuilder::buildSequence(), llvm::MachineRegisterInfo::createGenericVirtualRegister(), llvm::MachineInstr::eraseFromParent(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::LLT::getSizeInBits(), llvm::MachineRegisterInfo::getType(), i, Legalized, llvm::SmallVectorTemplateBase< T, isPodLike >::push_back(), llvm::SmallVectorTemplateBase< T, isPodLike< T >::value >::push_back(), llvm::MachineIRBuilder::setInstr(), and UnableToLegalize.
Referenced by legalizeInstrStep().
| LegalizerHelper::LegalizeResult LegalizerHelper::legalizeInstr | ( | MachineInstr & | MI, |
| const LegalizerInfo & | LegalizerInfo | ||
| ) |
Definition at line 59 of file LegalizerHelper.cpp.
References AlreadyLegal, Legalized, legalizeInstrStep(), llvm::SmallVectorTemplateBase< T, isPodLike< T >::value >::push_back(), llvm::MachineIRBuilder::recordInsertions(), llvm::SmallVectorTemplateCommon< T >::size(), llvm::MachineIRBuilder::stopRecordingInsertions(), and UnableToLegalize.
Referenced by llvm::Legalizer::runOnMachineFunction().
| LegalizerHelper::LegalizeResult LegalizerHelper::legalizeInstrStep | ( | MachineInstr & | MI, |
| const LegalizerInfo & | LegalizerInfo | ||
| ) |
Replace MI by a sequence of legal instructions that can implement the same operation.
Note that this means MI may be deleted, so any iterator steps should be performed before calling this function. Helper should be initialized to the MachineFunction containing MI.
Considered as an opaque blob, the legal code will use and define the same registers as MI.
Definition at line 37 of file LegalizerHelper.cpp.
References AlreadyLegal, llvm::LegalizerInfo::FewerElements, fewerElementsVector(), llvm::LegalizerInfo::getAction(), llvm::LegalizerInfo::Legal, libcall(), llvm::LegalizerInfo::Libcall, lower(), llvm::LegalizerInfo::Lower, llvm::LegalizerInfo::NarrowScalar, narrowScalar(), UnableToLegalize, llvm::LegalizerInfo::WidenScalar, and widenScalar().
Referenced by legalizeInstr().
| LegalizerHelper::LegalizeResult LegalizerHelper::libcall | ( | MachineInstr & | MI | ) |
Legalize an instruction by emiting a runtime library call instead.
Definition at line 96 of file LegalizerHelper.cpp.
References llvm::MachineOperand::CreateES(), llvm::MachineInstr::eraseFromParent(), llvm::TargetSubtargetInfo::getCallLowering(), llvm::Function::getContext(), llvm::Type::getDoubleTy(), llvm::Type::getFloatTy(), llvm::MachineFunction::getFunction(), llvm::MachineIRBuilder::getMF(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::LLT::getSizeInBits(), llvm::MachineFunction::getSubtarget(), llvm::TargetSubtargetInfo::getTargetLowering(), llvm::MachineRegisterInfo::getType(), Legalized, llvm::RTLIB::REM_F32, llvm::RTLIB::REM_F64, llvm::MachineIRBuilder::setInstr(), and UnableToLegalize.
Referenced by legalizeInstrStep().
| LegalizerHelper::LegalizeResult LegalizerHelper::lower | ( | MachineInstr & | MI, |
| unsigned | TypeIdx, | ||
| LLT | Ty | ||
| ) |
Legalize an instruction by splitting it into simpler parts, hopefully understood by the target.
Definition at line 296 of file LegalizerHelper.cpp.
References llvm::MachineInstr::eraseFromParent(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), Legalized, MRI, and UnableToLegalize.
Referenced by legalizeInstrStep().
| LegalizeResult llvm::LegalizerHelper::moreElementsVector | ( | MachineInstr & | MI, |
| unsigned | TypeIdx, | ||
| LLT | WideTy | ||
| ) |
Legalize a vector instruction by increasing the number of vector elements involved and ignoring the added elements later.
| LegalizerHelper::LegalizeResult LegalizerHelper::narrowScalar | ( | MachineInstr & | MI, |
| unsigned | TypeIdx, | ||
| LLT | NarrowTy | ||
| ) |
Legalize an instruction by reducing the width of the underlying scalar type.
Definition at line 122 of file LegalizerHelper.cpp.
References llvm::MachineIRBuilder::buildConstant(), llvm::MachineIRBuilder::buildSequence(), llvm::MachineIRBuilder::buildUAdde(), llvm::MachineRegisterInfo::createGenericVirtualRegister(), llvm::MachineInstr::eraseFromParent(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::LLT::getSizeInBits(), llvm::getSizeInBits(), llvm::MachineRegisterInfo::getType(), i, Legalized, llvm::SmallVectorTemplateBase< T, isPodLike >::push_back(), llvm::SmallVectorTemplateBase< T, isPodLike< T >::value >::push_back(), llvm::LLT::scalar(), llvm::MachineIRBuilder::setInstr(), and UnableToLegalize.
Referenced by legalizeInstrStep().
| LegalizerHelper::LegalizeResult LegalizerHelper::widenScalar | ( | MachineInstr & | MI, |
| unsigned | TypeIdx, | ||
| LLT | WideTy | ||
| ) |
Legalize an instruction by performing the operation on a wider scalar type (for example a 16-bit addition can be safely performed at 32-bits precision, ignoring the unused bits).
Definition at line 167 of file LegalizerHelper.cpp.
References llvm::MachineInstrBuilder::addDef(), llvm::MachineInstrBuilder::addUse(), llvm::alignTo(), assert(), llvm::MachineIRBuilder::buildAnyExt(), llvm::MachineIRBuilder::buildBrCond(), llvm::MachineIRBuilder::buildConstant(), llvm::MachineIRBuilder::buildFConstant(), llvm::MachineIRBuilder::buildFPTrunc(), llvm::MachineIRBuilder::buildICmp(), llvm::MachineIRBuilder::buildInstr(), llvm::MachineIRBuilder::buildLoad(), llvm::MachineIRBuilder::buildSExt(), llvm::MachineIRBuilder::buildStore(), llvm::MachineIRBuilder::buildTrunc(), llvm::MachineIRBuilder::buildZExt(), llvm::MachineRegisterInfo::createGenericVirtualRegister(), llvm::MachineInstr::eraseFromParent(), llvm::MachineOperand::getCImm(), llvm::MachineOperand::getFPImm(), llvm::MachineOperand::getMBB(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getPredicate(), llvm::MachineOperand::getReg(), llvm::LLT::getSizeInBits(), llvm::getSizeInBits(), llvm::MachineRegisterInfo::getType(), llvm::CmpInst::isSigned(), Legalized, llvm::MachineInstr::memoperands_begin(), llvm::MachineIRBuilder::setInstr(), llvm::MachineOperand::setReg(), and UnableToLegalize.
Referenced by legalizeInstrStep().
1.8.6