51 lines
2.0 KiB
C++
51 lines
2.0 KiB
C++
|
//===-- XCoreSelectionDAGInfo.cpp - XCore SelectionDAG Info ---------------===//
|
||
|
|
//
|
||
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
||
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
||
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
//
|
||
|
|
// This file implements the XCoreSelectionDAGInfo class.
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
|
||
|
|
#include "XCoreTargetMachine.h"
|
||
|
|
using namespace llvm;
|
||
|
|
|
||
|
|
#define DEBUG_TYPE "xcore-selectiondag-info"
|
||
|
|
|
||
|
|
SDValue XCoreSelectionDAGInfo::EmitTargetCodeForMemcpy(
|
||
|
|
SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Dst, SDValue Src,
|
||
|
|
SDValue Size, Align Alignment, bool isVolatile, bool AlwaysInline,
|
||
|
|
MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const {
|
||
|
|
unsigned SizeBitWidth = Size.getValueSizeInBits();
|
||
|
|
// Call __memcpy_4 if the src, dst and size are all 4 byte aligned.
|
||
|
|
if (!AlwaysInline && Alignment >= Align(4) &&
|
||
|
|
DAG.MaskedValueIsZero(Size, APInt(SizeBitWidth, 3))) {
|
||
|
|
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);
|
||
|
|
|
||
|
|
TargetLowering::CallLoweringInfo CLI(DAG);
|
||
|
|
CLI.setDebugLoc(dl)
|
||
|
|
.setChain(Chain)
|
||
|
|
.setLibCallee(TLI.getLibcallCallingConv(RTLIB::MEMCPY),
|
||
|
|
Type::getVoidTy(*DAG.getContext()),
|
||
|
|
DAG.getExternalSymbol(
|
||
|
|
"__memcpy_4", TLI.getPointerTy(DAG.getDataLayout())),
|
||
|
|
std::move(Args))
|
||
|
|
.setDiscardResult();
|
||
|
|
|
||
|
|
std::pair<SDValue,SDValue> CallResult = TLI.LowerCallTo(CLI);
|
||
|
|
return CallResult.second;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Otherwise have the target-independent code call memcpy.
|
||
|
|
return SDValue();
|
||
|
|
}
|