#include "Target/X86/X86SelectionDAGInfo.h"
Public Member Functions | |
| X86SelectionDAGInfo ()=default | |
| SDValue | EmitTargetCodeForMemset (SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Dst, SDValue Src, SDValue Size, unsigned Align, bool isVolatile, MachinePointerInfo DstPtrInfo) const override |
| Emit target-specific code that performs a memset. More... | |
| SDValue | EmitTargetCodeForMemcpy (SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Dst, SDValue Src, SDValue Size, unsigned Align, bool isVolatile, bool AlwaysInline, MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const override |
| Emit target-specific code that performs a memcpy. More... | |
 Public Member Functions inherited from llvm::SelectionDAGTargetInfo | |
| SelectionDAGTargetInfo ()=default | |
| SelectionDAGTargetInfo (const SelectionDAGTargetInfo &)=delete | |
| SelectionDAGTargetInfo & | operator= (const SelectionDAGTargetInfo &)=delete |
| virtual | ~SelectionDAGTargetInfo () |
| virtual SDValue | EmitTargetCodeForMemmove (SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Op1, SDValue Op2, SDValue Op3, unsigned Align, bool isVolatile, MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const |
| Emit target-specific code that performs a memmove. More... | |
| virtual std::pair< SDValue, SDValue > | EmitTargetCodeForMemcmp (SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Op1, SDValue Op2, SDValue Op3, MachinePointerInfo Op1PtrInfo, MachinePointerInfo Op2PtrInfo) const |
| Emit target-specific code that performs a memcmp, in cases where that is faster than a libcall. More... | |
| virtual std::pair< SDValue, SDValue > | EmitTargetCodeForMemchr (SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Src, SDValue Char, SDValue Length, MachinePointerInfo SrcPtrInfo) const |
| Emit target-specific code that performs a memchr, in cases where that is faster than a libcall. More... | |
| virtual std::pair< SDValue, SDValue > | EmitTargetCodeForStrcpy (SelectionDAG &DAG, const SDLoc &DL, SDValue Chain, SDValue Dest, SDValue Src, MachinePointerInfo DestPtrInfo, MachinePointerInfo SrcPtrInfo, bool isStpcpy) const |
| Emit target-specific code that performs a strcpy or stpcpy, in cases where that is faster than a libcall. More... | |
| virtual std::pair< SDValue, SDValue > | EmitTargetCodeForStrcmp (SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Op1, SDValue Op2, MachinePointerInfo Op1PtrInfo, MachinePointerInfo Op2PtrInfo) const |
| Emit target-specific code that performs a strcmp, in cases where that is faster than a libcall. More... | |
| virtual std::pair< SDValue, SDValue > | EmitTargetCodeForStrlen (SelectionDAG &DAG, const SDLoc &DL, SDValue Chain, SDValue Src, MachinePointerInfo SrcPtrInfo) const |
| virtual std::pair< SDValue, SDValue > | EmitTargetCodeForStrnlen (SelectionDAG &DAG, const SDLoc &DL, SDValue Chain, SDValue Src, SDValue MaxLength, MachinePointerInfo SrcPtrInfo) const |
| virtual bool | generateFMAsInMachineCombiner (CodeGenOpt::Level OptLevel) const |
Detailed Description
Definition at line 26 of file X86SelectionDAGInfo.h.
Constructor & Destructor Documentation
◆ X86SelectionDAGInfo()
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explicitdefault |
Member Function Documentation
◆ EmitTargetCodeForMemcpy()
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overridevirtual |
Emit target-specific code that performs a memcpy.
This can be used by targets to provide code sequences for cases that don't fit the target's parameters for simple loads/stores and can be more efficient than using a library call. This function can return a null SDValue if the target declines to use custom code and a different lowering strategy should be used.
If AlwaysInline is true, the size is constant and the target should not emit any calls and is strongly encouraged to attempt to emit inline code even if it is beyond the usual threshold because this intrinsic is being expanded in a place where calls are not feasible (e.g. within the prologue for another call). If the target chooses to decline an AlwaysInline request here, legalize will resort to using simple loads and stores.
If not DWORD aligned, it is more efficient to call the library. However if calling the library is not allowed (AlwaysInline), then soldier on as the code generated here is better than the long load-store sequence we would otherwise get.
Reimplemented from llvm::SelectionDAGTargetInfo.
Definition at line 204 of file X86SelectionDAGInfo.cpp.
References llvm::ISD::ADD, llvm::dyn_cast(), llvm::N86::ECX, llvm::N86::EDI, llvm::N86::ESI, llvm::MachinePointerInfo::getAddrSpace(), llvm::SelectionDAG::getConstant(), llvm::SelectionDAG::getCopyToReg(), llvm::MachineFunction::getFunction(), llvm::SelectionDAG::getIntPtrConstant(), llvm::SelectionDAG::getMachineFunction(), llvm::SelectionDAG::getMemcpy(), llvm::SelectionDAG::getNode(), llvm::MachineFunction::getSubtarget(), llvm::SDValue::getValue(), llvm::SDValue::getValueType(), llvm::SelectionDAG::getValueType(), llvm::SelectionDAG::getVTList(), llvm::MachinePointerInfo::getWithOffset(), llvm::ConstantSDNode::getZExtValue(), llvm::MVT::Glue, llvm::MVT::i16, llvm::MVT::i32, llvm::MVT::i64, llvm::MVT::i8, llvm::Function::optForMinSize(), llvm::MVT::Other, llvm::SmallVectorTemplateBase< T >::push_back(), llvm::X86ISD::REP_MOVS, Results, Size, and llvm::ISD::TokenFactor.
◆ EmitTargetCodeForMemset()
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overridevirtual |
Emit target-specific code that performs a memset.
This can be used by targets to provide code sequences for cases that don't fit the target's parameters for simple stores and can be more efficient than using a library call. This function can return a null SDValue if the target declines to use custom code and a different lowering strategy should be used.
Reimplemented from llvm::SelectionDAGTargetInfo.
Definition at line 65 of file X86SelectionDAGInfo.cpp.
References llvm::ISD::ADD, llvm::AArch64CC::AL, llvm::AMDGPU::HSAMD::Kernel::Arg::Key::Align, llvm::AMDGPU::HSAMD::Kernel::Key::Args, assert(), llvm::EVT::bitsGT(), llvm::CallingConv::C, llvm::dyn_cast(), llvm::N86::EAX, llvm::N86::ECX, llvm::N86::EDI, llvm::MachinePointerInfo::getAddrSpace(), llvm::SelectionDAG::getConstant(), llvm::SelectionDAG::getContext(), llvm::SelectionDAG::getCopyToReg(), llvm::SelectionDAG::getDataLayout(), llvm::SelectionDAG::getExternalSymbol(), llvm::SelectionDAG::getIntPtrConstant(), llvm::DataLayout::getIntPtrType(), llvm::TargetLoweringBase::getLibcallName(), llvm::SelectionDAG::getMachineFunction(), llvm::SelectionDAG::getMemset(), llvm::SelectionDAG::getNode(), llvm::TargetLoweringBase::getPointerTy(), llvm::EVT::getSizeInBits(), llvm::MachineFunction::getSubtarget(), llvm::SelectionDAG::getTargetLoweringInfo(), llvm::SDValue::getValue(), llvm::SDValue::getValueType(), llvm::SelectionDAG::getValueType(), llvm::Type::getVoidTy(), llvm::SelectionDAG::getVTList(), llvm::MachinePointerInfo::getWithOffset(), llvm::ConstantSDNode::getZExtValue(), llvm::MVT::Glue, llvm::MVT::i16, llvm::MVT::i32, llvm::MVT::i64, llvm::MVT::i8, llvm::ConstantSDNode::isNullValue(), isVolatile(), llvm::TargetLowering::LowerCallTo(), llvm::TargetLoweringBase::ArgListEntry::Node, llvm::MVT::Other, llvm::X86ISD::REP_STOS, llvm::TargetLowering::CallLoweringInfo::setChain(), llvm::TargetLowering::CallLoweringInfo::setDebugLoc(), llvm::TargetLowering::CallLoweringInfo::setLibCallee(), Size, and llvm::TargetLoweringBase::ArgListEntry::Ty.
The documentation for this class was generated from the following files:
- lib/Target/X86/X86SelectionDAGInfo.h
- lib/Target/X86/X86SelectionDAGInfo.cpp
