mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-20 11:33:24 +02:00
88936693e4
Reviewers: mkuper, rnk Subscribers: mehdi_amini, jyknight, aemerson, llvm-commits, rengolin Differential Revision: https://reviews.llvm.org/D27050 llvm-svn: 298179
65 lines
2.3 KiB
C++
65 lines
2.3 KiB
C++
//===-- HexagonSelectionDAGInfo.cpp - Hexagon SelectionDAG Info -----------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the HexagonSelectionDAGInfo class.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "HexagonTargetMachine.h"
|
|
#include "llvm/CodeGen/SelectionDAG.h"
|
|
using namespace llvm;
|
|
|
|
#define DEBUG_TYPE "hexagon-selectiondag-info"
|
|
|
|
SDValue HexagonSelectionDAGInfo::EmitTargetCodeForMemcpy(
|
|
SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Dst, SDValue Src,
|
|
SDValue Size, unsigned Align, bool isVolatile, bool AlwaysInline,
|
|
MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const {
|
|
ConstantSDNode *ConstantSize = dyn_cast<ConstantSDNode>(Size);
|
|
if (AlwaysInline || (Align & 0x3) != 0 || !ConstantSize)
|
|
return SDValue();
|
|
|
|
uint64_t SizeVal = ConstantSize->getZExtValue();
|
|
if (SizeVal < 32 || (SizeVal % 8) != 0)
|
|
return SDValue();
|
|
|
|
// Special case aligned memcpys with size >= 32 bytes and a multiple of 8.
|
|
//
|
|
const TargetLowering &TLI = *DAG.getSubtarget().getTargetLowering();
|
|
TargetLowering::ArgListTy Args;
|
|
TargetLowering::ArgListEntry Entry;
|
|
Entry.Ty = DAG.getDataLayout().getIntPtrType(*DAG.getContext());
|
|
Entry.Node = Dst;
|
|
Args.push_back(Entry);
|
|
Entry.Node = Src;
|
|
Args.push_back(Entry);
|
|
Entry.Node = Size;
|
|
Args.push_back(Entry);
|
|
|
|
const char *SpecialMemcpyName =
|
|
"__hexagon_memcpy_likely_aligned_min32bytes_mult8bytes";
|
|
const MachineFunction &MF = DAG.getMachineFunction();
|
|
bool LongCalls = MF.getSubtarget<HexagonSubtarget>().useLongCalls();
|
|
unsigned Flags = LongCalls ? HexagonII::HMOTF_ConstExtended : 0;
|
|
|
|
TargetLowering::CallLoweringInfo CLI(DAG);
|
|
CLI.setDebugLoc(dl)
|
|
.setChain(Chain)
|
|
.setLibCallee(
|
|
TLI.getLibcallCallingConv(RTLIB::MEMCPY),
|
|
Type::getVoidTy(*DAG.getContext()),
|
|
DAG.getTargetExternalSymbol(
|
|
SpecialMemcpyName, TLI.getPointerTy(DAG.getDataLayout()), Flags),
|
|
std::move(Args))
|
|
.setDiscardResult();
|
|
|
|
std::pair<SDValue, SDValue> CallResult = TLI.LowerCallTo(CLI);
|
|
return CallResult.second;
|
|
}
|