llvm::X86SelectionDAGInfo Class Reference

#include <X86SelectionDAGInfo.h>

Inheritance diagram for llvm::X86SelectionDAGInfo:

Collaboration diagram for llvm::X86SelectionDAGInfo:

List of all members.

Public Member Functions
	X86SelectionDAGInfo (const DataLayout &DL)
	~X86SelectionDAGInfo ()
SDValue	EmitTargetCodeForMemset (SelectionDAG &DAG, SDLoc dl, SDValue Chain, SDValue Dst, SDValue Src, SDValue Size, unsigned Align, bool isVolatile, MachinePointerInfo DstPtrInfo) const override
SDValue	EmitTargetCodeForMemcpy (SelectionDAG &DAG, SDLoc dl, SDValue Chain, SDValue Dst, SDValue Src, SDValue Size, unsigned Align, bool isVolatile, bool AlwaysInline, MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const override

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Detailed Description

Definition at line 25 of file X86SelectionDAGInfo.h.

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Constructor & Destructor Documentation

X86SelectionDAGInfo::X86SelectionDAGInfo

(

const DataLayout &

DL

)

[explicit]

Definition at line 27 of file X86SelectionDAGInfo.cpp.

X86SelectionDAGInfo::~X86SelectionDAGInfo

(

)

Definition at line 30 of file X86SelectionDAGInfo.cpp.

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Member Function Documentation

SDValue X86SelectionDAGInfo::EmitTargetCodeForMemcpy	(	SelectionDAG &	DAG,
		SDLoc	dl,
		SDValue	Chain,
		SDValue	Op1,
		SDValue	Op2,
		SDValue	Op3,
		unsigned	Align,
		bool	isVolatile,
		bool	AlwaysInline,
		MachinePointerInfo	DstPtrInfo,
		MachinePointerInfo	SrcPtrInfo
	)		const [override, virtual]

EmitTargetCodeForMemcpy - 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::TargetSelectionDAGInfo.

Definition at line 203 of file X86SelectionDAGInfo.cpp.

References llvm::ISD::ADD, Align(), llvm::dyn_cast(), llvm::N86::ECX, llvm::N86::EDI, llvm::N86::ESI, llvm::MachinePointerInfo::getAddrSpace(), llvm::SelectionDAG::getConstant(), llvm::SelectionDAG::getCopyToReg(), llvm::SelectionDAG::getIntPtrConstant(), llvm::SelectionDAG::getMemcpy(), llvm::SelectionDAG::getNode(), llvm::MVT::getSizeInBits(), llvm::TargetMachine::getSubtarget(), llvm::SelectionDAG::getTarget(), 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::MVT::Other, llvm::SmallVectorTemplateBase< T, isPodLike< T >::value >::push_back(), llvm::X86ISD::REP_MOVS, and llvm::ISD::TokenFactor.

SDValue X86SelectionDAGInfo::EmitTargetCodeForMemset	(	SelectionDAG &	DAG,
		SDLoc	dl,
		SDValue	Chain,
		SDValue	Op1,
		SDValue	Op2,
		SDValue	Op3,
		unsigned	Align,
		bool	isVolatile,
		MachinePointerInfo	DstPtrInfo
	)		const [override, virtual]

EmitTargetCodeForMemset - 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::TargetSelectionDAGInfo.

Definition at line 53 of file X86SelectionDAGInfo.cpp.

References llvm::ISD::ADD, llvm::AArch64CC::AL, Align(), llvm::ISD::AND, 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::TargetSelectionDAGInfo::getDataLayout(), llvm::SelectionDAG::getExternalSymbol(), llvm::SelectionDAG::getIntPtrConstant(), llvm::DataLayout::getIntPtrType(), llvm::SelectionDAG::getMemset(), llvm::SelectionDAG::getNode(), llvm::TargetLoweringBase::getPointerTy(), llvm::EVT::getSizeInBits(), llvm::TargetMachine::getSubtarget(), llvm::SelectionDAG::getTarget(), 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(), llvm::TargetLowering::LowerCallTo(), llvm::TargetLowering::ArgListEntry::Node, llvm::MVT::Other, llvm::X86ISD::REP_STOS, llvm::TargetLowering::CallLoweringInfo::setCallee(), llvm::TargetLowering::CallLoweringInfo::setChain(), llvm::TargetLowering::CallLoweringInfo::setDebugLoc(), and llvm::TargetLowering::ArgListEntry::Ty.

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The documentation for this class was generated from the following files:

• X86SelectionDAGInfo.h
• X86SelectionDAGInfo.cpp