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 #define DEBUG_TYPE "hexagon-selectiondag-info"
15 #include "HexagonTargetMachine.h"
16 using namespace llvm;
17
18 bool llvm::flag_aligned_memcpy;
19
HexagonSelectionDAGInfo(const HexagonTargetMachine & TM)20 HexagonSelectionDAGInfo::HexagonSelectionDAGInfo(const HexagonTargetMachine
21 &TM)
22 : TargetSelectionDAGInfo(TM) {
23 }
24
~HexagonSelectionDAGInfo()25 HexagonSelectionDAGInfo::~HexagonSelectionDAGInfo() {
26 }
27
28 SDValue
29 HexagonSelectionDAGInfo::
EmitTargetCodeForMemcpy(SelectionDAG & DAG,DebugLoc dl,SDValue Chain,SDValue Dst,SDValue Src,SDValue Size,unsigned Align,bool isVolatile,bool AlwaysInline,MachinePointerInfo DstPtrInfo,MachinePointerInfo SrcPtrInfo) const30 EmitTargetCodeForMemcpy(SelectionDAG &DAG, DebugLoc dl, SDValue Chain,
31 SDValue Dst, SDValue Src, SDValue Size, unsigned Align,
32 bool isVolatile, bool AlwaysInline,
33 MachinePointerInfo DstPtrInfo,
34 MachinePointerInfo SrcPtrInfo) const {
35 flag_aligned_memcpy = false;
36 if ((Align & 0x3) == 0) {
37 ConstantSDNode *ConstantSize = dyn_cast<ConstantSDNode>(Size);
38 if (ConstantSize) {
39 uint64_t SizeVal = ConstantSize->getZExtValue();
40 if ((SizeVal > 32) && ((SizeVal % 8) == 0))
41 flag_aligned_memcpy = true;
42 }
43 }
44
45 return SDValue();
46 }
47