HexagonSelectionDAGInfo.cpp revision dce4a407a24b04eebc6a376f8e62b41aaa7b071f 
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 HexagonTargetMachine
22                                                 &TM)
23  : TargetSelectionDAGInfo(TM) {
24}
25
26HexagonSelectionDAGInfo::~HexagonSelectionDAGInfo() {
27}
28
29SDValue
30HexagonSelectionDAGInfo::
31EmitTargetCodeForMemcpy(SelectionDAG &DAG, SDLoc dl, SDValue Chain,
32                        SDValue Dst, SDValue Src, SDValue Size, unsigned Align,
33                        bool isVolatile, bool AlwaysInline,
34                        MachinePointerInfo DstPtrInfo,
35                        MachinePointerInfo SrcPtrInfo) const {
36  flag_aligned_memcpy = false;
37  if ((Align & 0x3) == 0) {
38    ConstantSDNode *ConstantSize = dyn_cast<ConstantSDNode>(Size);
39    if (ConstantSize) {
40      uint64_t SizeVal = ConstantSize->getZExtValue();
41      if ((SizeVal > 32) && ((SizeVal % 8) == 0))
42        flag_aligned_memcpy = true;
43    }
44  }
45
46  return SDValue();
47}
48