LLVM: llvm::SelectionDAGTargetInfo Class Reference (original) (raw)

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

#include "[llvm/CodeGen/SelectionDAGTargetInfo.h](SelectionDAGTargetInfo%5F8h%5Fsource.html)"

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

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

Definition at line 33 of file SelectionDAGTargetInfo.h.

llvm::SelectionDAGTargetInfo::SelectionDAGTargetInfo ( ) explicitdefault

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

◆ SelectionDAGTargetInfo() [2/2]

References SelectionDAGTargetInfo().

◆ ~SelectionDAGTargetInfo()

SelectionDAGTargetInfo::~SelectionDAGTargetInfo ( ) virtualdefault

◆ disableGenericCombines()

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

◆ EmitTargetCodeForMemchr()

◆ EmitTargetCodeForMemcmp()

◆ 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()

◆ EmitTargetCodeForMemset()

◆ EmitTargetCodeForSetTag()

◆ EmitTargetCodeForStrcmp()

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()

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()

◆ EmitTargetCodeForStrnlen()

◆ getTargetNodeName()

virtual const char * llvm::SelectionDAGTargetInfo::getTargetNodeName ( unsigned Opcode) const inlinevirtual

◆ isTargetMemoryOpcode()

virtual bool llvm::SelectionDAGTargetInfo::isTargetMemoryOpcode ( unsigned Opcode) const inlinevirtual

◆ isTargetStrictFPOpcode()

virtual bool llvm::SelectionDAGTargetInfo::isTargetStrictFPOpcode ( unsigned Opcode) const inlinevirtual

◆ mayRaiseFPException()

bool SelectionDAGTargetInfo::mayRaiseFPException ( unsigned Opcode) const virtual

◆ operator=()

References SelectionDAGTargetInfo().

◆ verifyTargetNode()

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