1 //===-- HexagonSelectionDAGInfo.cpp - Hexagon SelectionDAG Info -----------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements the HexagonSelectionDAGInfo class.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "HexagonTargetMachine.h"
15 using namespace llvm;
16
17 #define DEBUG_TYPE "hexagon-selectiondag-info"
18
19 bool llvm::flag_aligned_memcpy;
20
HexagonSelectionDAGInfo(const DataLayout & DL)21 HexagonSelectionDAGInfo::HexagonSelectionDAGInfo(const DataLayout &DL)
22 : TargetSelectionDAGInfo(&DL) {}
23
~HexagonSelectionDAGInfo()24 HexagonSelectionDAGInfo::~HexagonSelectionDAGInfo() {
25 }
26
27 SDValue
28 HexagonSelectionDAGInfo::
EmitTargetCodeForMemcpy(SelectionDAG & DAG,SDLoc dl,SDValue Chain,SDValue Dst,SDValue Src,SDValue Size,unsigned Align,bool isVolatile,bool AlwaysInline,MachinePointerInfo DstPtrInfo,MachinePointerInfo SrcPtrInfo) const29 EmitTargetCodeForMemcpy(SelectionDAG &DAG, SDLoc dl, SDValue Chain,
30 SDValue Dst, SDValue Src, SDValue Size, unsigned Align,
31 bool isVolatile, bool AlwaysInline,
32 MachinePointerInfo DstPtrInfo,
33 MachinePointerInfo SrcPtrInfo) const {
34 flag_aligned_memcpy = false;
35 if ((Align & 0x3) == 0) {
36 ConstantSDNode *ConstantSize = dyn_cast<ConstantSDNode>(Size);
37 if (ConstantSize) {
38 uint64_t SizeVal = ConstantSize->getZExtValue();
39 if ((SizeVal > 32) && ((SizeVal % 8) == 0))
40 flag_aligned_memcpy = true;
41 }
42 }
43
44 return SDValue();
45 }
46