#include "Target/BPF/BPFSelectionDAGInfo.h"

Inheritance diagram for llvm::BPFSelectionDAGInfo:

Public Member Functions
SDValue	EmitTargetCodeForMemcpy (SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Dst, SDValue Src, SDValue Size, Align Alignment, bool isVolatile, bool AlwaysInline, MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const override
	Emit target-specific code that performs a memcpy.
unsigned	getCommonMaxStoresPerMemFunc () const
Public Member Functions inherited from llvm::SelectionDAGTargetInfo
	SelectionDAGTargetInfo ()=default
	SelectionDAGTargetInfo (const SelectionDAGTargetInfo &)=delete
SelectionDAGTargetInfo &	operator= (const SelectionDAGTargetInfo &)=delete
virtual	~SelectionDAGTargetInfo ()
virtual const char *	getTargetNodeName (unsigned Opcode) const
	Returns the name of the given target-specific opcode, suitable for debug printing.
virtual bool	isTargetMemoryOpcode (unsigned Opcode) const
	Returns true if a node with the given target-specific opcode has a memory operand.
virtual bool	isTargetStrictFPOpcode (unsigned Opcode) const
	Returns true if a node with the given target-specific opcode has strict floating-point semantics.
virtual bool	mayRaiseFPException (unsigned Opcode) const
	Returns true if a node with the given target-specific opcode may raise a floating-point exception.
virtual void	verifyTargetNode (const SelectionDAG &DAG, const SDNode *N) const
	Checks that the given target-specific node is valid. Aborts if it is not.
virtual SDValue	EmitTargetCodeForMemmove (SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Op1, SDValue Op2, SDValue Op3, Align Alignment, bool isVolatile, MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const
	Emit target-specific code that performs a memmove.
virtual SDValue	EmitTargetCodeForMemset (SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Op1, SDValue Op2, SDValue Op3, Align Alignment, bool isVolatile, bool AlwaysInline, MachinePointerInfo DstPtrInfo) const
	Emit target-specific code that performs a memset.
virtual std::pair< SDValue, SDValue >	EmitTargetCodeForMemcmp (SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Op1, SDValue Op2, SDValue Op3, const CallInst *CI) const
	Emit target-specific code that performs a memcmp/bcmp, in cases where that is faster than a libcall.
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.
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.
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.
virtual std::pair< SDValue, SDValue >	EmitTargetCodeForStrlen (SelectionDAG &DAG, const SDLoc &DL, SDValue Chain, SDValue Src, const CallInst *CI) const
virtual std::pair< SDValue, SDValue >	EmitTargetCodeForStrnlen (SelectionDAG &DAG, const SDLoc &DL, SDValue Chain, SDValue Src, SDValue MaxLength, MachinePointerInfo SrcPtrInfo) const
virtual SDValue	EmitTargetCodeForSetTag (SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Addr, SDValue Size, MachinePointerInfo DstPtrInfo, bool ZeroData) const
virtual bool	disableGenericCombines (CodeGenOptLevel OptLevel) const

Detailed Description

Definition at line 20 of file BPFSelectionDAGInfo.h.

Member Function Documentation

◆ EmitTargetCodeForMemcpy()

SDValue BPFSelectionDAGInfo::EmitTargetCodeForMemcpy	(	SelectionDAG &	DAG,
		const SDLoc &	dl,
		SDValue	Chain,
		SDValue	Op1,
		SDValue	Op2,
		SDValue	Op3,
		Align	Alignment,
		bool	isVolatile,
		bool	AlwaysInline,
		MachinePointerInfo	DstPtrInfo,
		MachinePointerInfo	SrcPtrInfo ) const

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.

Reimplemented from llvm::SelectionDAGTargetInfo.

Definition at line 19 of file BPFSelectionDAGInfo.cpp.

References llvm::alignTo(), llvm::dyn_cast(), getCommonMaxStoresPerMemFunc(), llvm::SelectionDAG::getConstant(), llvm::SelectionDAG::getNode(), llvm::SDValue::getValue(), llvm::SelectionDAG::getVTList(), llvm::ConstantSDNode::getZExtValue(), llvm::Log2(), llvm::BPFISD::MEMCPY, SDValue(), Size, and llvm::Align::value().

◆ getCommonMaxStoresPerMemFunc()

unsigned llvm::BPFSelectionDAGInfo::getCommonMaxStoresPerMemFunc ( ) const

inline

Definition at line 29 of file BPFSelectionDAGInfo.h.

Referenced by llvm::BPFTargetLowering::BPFTargetLowering(), and EmitTargetCodeForMemcpy().

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

lib/Target/BPF/BPFSelectionDAGInfo.h
lib/Target/BPF/BPFSelectionDAGInfo.cpp

Public Member Functions

Detailed Description

Member Function Documentation

◆ EmitTargetCodeForMemcpy()

◆ getCommonMaxStoresPerMemFunc()