LLVM  mainline
Public Member Functions
llvm::HexagonSelectionDAGInfo Class Reference

#include <HexagonSelectionDAGInfo.h>

Inheritance diagram for llvm::HexagonSelectionDAGInfo:
Inheritance graph
Collaboration diagram for llvm::HexagonSelectionDAGInfo:
Collaboration graph

List of all members.

Public Member Functions

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
 Emit target-specific code that performs a memcpy.

Detailed Description

Definition at line 21 of file HexagonSelectionDAGInfo.h.

Member Function Documentation

SDValue HexagonSelectionDAGInfo::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]

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::TargetSelectionDAGInfo.

Definition at line 22 of file HexagonSelectionDAGInfo.cpp.

References llvm::dyn_cast(), llvm::SelectionDAG::getContext(), llvm::SelectionDAG::getDataLayout(), llvm::DataLayout::getIntPtrType(), llvm::TargetLoweringBase::getLibcallCallingConv(), llvm::TargetLoweringBase::getPointerTy(), llvm::SelectionDAG::getSubtarget(), llvm::SelectionDAG::getTargetExternalSymbol(), llvm::TargetSubtargetInfo::getTargetLowering(), llvm::Type::getVoidTy(), llvm::ConstantSDNode::getZExtValue(), llvm::TargetLowering::LowerCallTo(), llvm::RTLIB::MEMCPY, llvm::TargetLowering::ArgListEntry::Node, llvm::TargetLowering::CallLoweringInfo::setCallee(), llvm::TargetLowering::CallLoweringInfo::setChain(), llvm::TargetLowering::CallLoweringInfo::setDebugLoc(), and llvm::TargetLowering::ArgListEntry::Ty.

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