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"
15using namespace llvm;
16
17#define DEBUG_TYPE "hexagon-selectiondag-info"
18
19bool llvm::flag_aligned_memcpy;
20
21HexagonSelectionDAGInfo::HexagonSelectionDAGInfo(const DataLayout &DL)
22    : TargetSelectionDAGInfo(&DL) {}
23
24HexagonSelectionDAGInfo::~HexagonSelectionDAGInfo() {
25}
26
27SDValue
28HexagonSelectionDAGInfo::
29EmitTargetCodeForMemcpy(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