Targets can subclass this to parameterize the SelectionDAG lowering and instruction selection process. More...

#include "llvm/CodeGen/SelectionDAGTargetInfo.h"

Inheritance diagram for llvm::SelectionDAGTargetInfo:

Public Member Functions
	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	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
	Emit target-specific code that performs a memcpy.
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

Targets can subclass this to parameterize the SelectionDAG lowering and instruction selection process.

Definition at line 33 of file SelectionDAGTargetInfo.h.

Constructor & Destructor Documentation

◆ SelectionDAGTargetInfo() [1/2]

llvm::SelectionDAGTargetInfo::SelectionDAGTargetInfo ( )

explicitdefault

Referenced by operator=(), and SelectionDAGTargetInfo().

◆ SelectionDAGTargetInfo() [2/2]

llvm::SelectionDAGTargetInfo::SelectionDAGTargetInfo ( const SelectionDAGTargetInfo & )

delete

References SelectionDAGTargetInfo().

◆ ~SelectionDAGTargetInfo()

SelectionDAGTargetInfo::~SelectionDAGTargetInfo ( )

virtualdefault

Member Function Documentation

◆ disableGenericCombines()

virtual bool llvm::SelectionDAGTargetInfo::disableGenericCombines ( CodeGenOptLevel OptLevel ) const

inlinevirtual

Definition at line 185 of file SelectionDAGTargetInfo.h.

◆ EmitTargetCodeForMemchr()

virtual std::pair< SDValue, SDValue > llvm::SelectionDAGTargetInfo::EmitTargetCodeForMemchr	(	SelectionDAG &	DAG,
		const SDLoc &	dl,
		SDValue	Chain,
		SDValue	Src,
		SDValue	Char,
		SDValue	Length,
		MachinePointerInfo	SrcPtrInfo ) const

inlinevirtual

Emit target-specific code that performs a memchr, in cases where that is faster than a libcall.

The first returned SDValue is the result of the memchr and the second is the chain. Both SDValues can be null if a normal libcall should be used.

Reimplemented in llvm::SystemZSelectionDAGInfo.

Definition at line 131 of file SelectionDAGTargetInfo.h.

References llvm::Length, and SDValue().

◆ EmitTargetCodeForMemcmp()

virtual std::pair< SDValue, SDValue > llvm::SelectionDAGTargetInfo::EmitTargetCodeForMemcmp	(	SelectionDAG &	DAG,
		const SDLoc &	dl,
		SDValue	Chain,
		SDValue	Op1,
		SDValue	Op2,
		SDValue	Op3,
		const CallInst *	CI ) const

inlinevirtual

Emit target-specific code that performs a memcmp/bcmp, in cases where that is faster than a libcall.

The first returned SDValue is the result of the memcmp and the second is the chain. Both SDValues can be null if a normal libcall should be used.

Reimplemented in llvm::PPCSelectionDAGInfo, and llvm::SystemZSelectionDAGInfo.

Definition at line 120 of file SelectionDAGTargetInfo.h.

References SDValue().

◆ EmitTargetCodeForMemcpy()

virtual SDValue llvm::SelectionDAGTargetInfo::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

inlinevirtual

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 in llvm::AArch64SelectionDAGInfo, llvm::ARMSelectionDAGInfo, llvm::BPFSelectionDAGInfo, llvm::HexagonSelectionDAGInfo, llvm::LanaiSelectionDAGInfo, llvm::SystemZSelectionDAGInfo, llvm::WebAssemblySelectionDAGInfo, llvm::X86SelectionDAGInfo, and llvm::XCoreSelectionDAGInfo.

Definition at line 76 of file SelectionDAGTargetInfo.h.

References SDValue().

◆ EmitTargetCodeForMemmove()

virtual SDValue llvm::SelectionDAGTargetInfo::EmitTargetCodeForMemmove	(	SelectionDAG &	DAG,
		const SDLoc &	dl,
		SDValue	Chain,
		SDValue	Op1,
		SDValue	Op2,
		SDValue	Op3,
		Align	Alignment,
		bool	isVolatile,
		MachinePointerInfo	DstPtrInfo,
		MachinePointerInfo	SrcPtrInfo ) const

inlinevirtual

Emit target-specific code that performs a memmove.

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.

Reimplemented in llvm::AArch64SelectionDAGInfo, llvm::ARMSelectionDAGInfo, and llvm::WebAssemblySelectionDAGInfo.

Definition at line 92 of file SelectionDAGTargetInfo.h.

References SDValue().

◆ EmitTargetCodeForMemset()

virtual SDValue llvm::SelectionDAGTargetInfo::EmitTargetCodeForMemset	(	SelectionDAG &	DAG,
		const SDLoc &	dl,
		SDValue	Chain,
		SDValue	Op1,
		SDValue	Op2,
		SDValue	Op3,
		Align	Alignment,
		bool	isVolatile,
		bool	AlwaysInline,
		MachinePointerInfo	DstPtrInfo ) const

inlinevirtual

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. Note that if AlwaysInline is true the function has to return a valid SDValue.

Reimplemented in llvm::AArch64SelectionDAGInfo, llvm::ARMSelectionDAGInfo, llvm::RISCVSelectionDAGInfo, llvm::SystemZSelectionDAGInfo, llvm::WebAssemblySelectionDAGInfo, and llvm::X86SelectionDAGInfo.

Definition at line 106 of file SelectionDAGTargetInfo.h.

References SDValue().

◆ EmitTargetCodeForSetTag()

virtual SDValue llvm::SelectionDAGTargetInfo::EmitTargetCodeForSetTag	(	SelectionDAG &	DAG,
		const SDLoc &	dl,
		SDValue	Chain,
		SDValue	Addr,
		SDValue	Size,
		MachinePointerInfo	DstPtrInfo,
		bool	ZeroData ) const

inlinevirtual

Reimplemented in llvm::AArch64SelectionDAGInfo.

Definition at line 176 of file SelectionDAGTargetInfo.h.

References SDValue(), and Size.

◆ EmitTargetCodeForStrcmp()

virtual std::pair< SDValue, SDValue > llvm::SelectionDAGTargetInfo::EmitTargetCodeForStrcmp	(	SelectionDAG &	DAG,
		const SDLoc &	dl,
		SDValue	Chain,
		SDValue	Op1,
		SDValue	Op2,
		MachinePointerInfo	Op1PtrInfo,
		MachinePointerInfo	Op2PtrInfo ) const

inlinevirtual

Emit target-specific code that performs a strcmp, in cases where that is faster than a libcall.

The first returned SDValue is the result of the strcmp and the second is the chain. Both SDValues can be null if a normal libcall should be used.

Reimplemented in llvm::SystemZSelectionDAGInfo.

Definition at line 156 of file SelectionDAGTargetInfo.h.

References SDValue().

◆ EmitTargetCodeForStrcpy()

virtual std::pair< SDValue, SDValue > llvm::SelectionDAGTargetInfo::EmitTargetCodeForStrcpy	(	SelectionDAG &	DAG,
		const SDLoc &	DL,
		SDValue	Chain,
		SDValue	Dest,
		SDValue	Src,
		MachinePointerInfo	DestPtrInfo,
		MachinePointerInfo	SrcPtrInfo,
		bool	isStpcpy ) const

inlinevirtual

Emit target-specific code that performs a strcpy or stpcpy, in cases where that is faster than a libcall.

The first returned SDValue is the result of the copy (the start of the destination string for strcpy, a pointer to the null terminator for stpcpy) and the second is the chain. Both SDValues can be null if a normal libcall should be used.

Reimplemented in llvm::SystemZSelectionDAGInfo.

Definition at line 144 of file SelectionDAGTargetInfo.h.

References DL, and SDValue().

◆ EmitTargetCodeForStrlen()

virtual std::pair< SDValue, SDValue > llvm::SelectionDAGTargetInfo::EmitTargetCodeForStrlen	(	SelectionDAG &	DAG,
		const SDLoc &	DL,
		SDValue	Chain,
		SDValue	Src,
		const CallInst *	CI ) const

inlinevirtual

Reimplemented in llvm::PPCSelectionDAGInfo, and llvm::SystemZSelectionDAGInfo.

Definition at line 164 of file SelectionDAGTargetInfo.h.

References DL, and SDValue().

◆ EmitTargetCodeForStrnlen()

virtual std::pair< SDValue, SDValue > llvm::SelectionDAGTargetInfo::EmitTargetCodeForStrnlen	(	SelectionDAG &	DAG,
		const SDLoc &	DL,
		SDValue	Chain,
		SDValue	Src,
		SDValue	MaxLength,
		MachinePointerInfo	SrcPtrInfo ) const