LLVM  14.0.0git
XCoreSelectionDAGInfo.cpp
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1 //===-- XCoreSelectionDAGInfo.cpp - XCore SelectionDAG Info ---------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements the XCoreSelectionDAGInfo class.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "XCoreTargetMachine.h"
14 using namespace llvm;
15 
16 #define DEBUG_TYPE "xcore-selectiondag-info"
17 
19  SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Dst, SDValue Src,
20  SDValue Size, Align Alignment, bool isVolatile, bool AlwaysInline,
21  MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const {
22  unsigned SizeBitWidth = Size.getValueSizeInBits();
23  // Call __memcpy_4 if the src, dst and size are all 4 byte aligned.
24  if (!AlwaysInline && Alignment >= Align(4) &&
25  DAG.MaskedValueIsZero(Size, APInt(SizeBitWidth, 3))) {
26  const TargetLowering &TLI = *DAG.getSubtarget().getTargetLowering();
29  Entry.Ty = DAG.getDataLayout().getIntPtrType(*DAG.getContext());
30  Entry.Node = Dst; Args.push_back(Entry);
31  Entry.Node = Src; Args.push_back(Entry);
32  Entry.Node = Size; Args.push_back(Entry);
33 
35  CLI.setDebugLoc(dl)
36  .setChain(Chain)
40  "__memcpy_4", TLI.getPointerTy(DAG.getDataLayout())),
41  std::move(Args))
43 
44  std::pair<SDValue,SDValue> CallResult = TLI.LowerCallTo(CLI);
45  return CallResult.second;
46  }
47 
48  // Otherwise have the target-independent code call memcpy.
49  return SDValue();
50 }
llvm::Check::Size
@ Size
Definition: FileCheck.h:73
llvm::XCoreSelectionDAGInfo::EmitTargetCodeForMemcpy
SDValue EmitTargetCodeForMemcpy(SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Op1, SDValue Op2, SDValue Op3, Align Alignment, bool isVolatile, bool AlwaysInline, MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const override
Emit target-specific code that performs a memcpy.
Definition: XCoreSelectionDAGInfo.cpp:18
llvm
This file implements support for optimizing divisions by a constant.
Definition: AllocatorList.h:23
llvm::SDLoc
Wrapper class for IR location info (IR ordering and DebugLoc) to be passed into SDNode creation funct...
Definition: SelectionDAGNodes.h:1086
llvm::TargetLowering::CallLoweringInfo::setChain
CallLoweringInfo & setChain(SDValue InChain)
Definition: TargetLowering.h:3791
llvm::ARMISD::MEMCPY
@ MEMCPY
Definition: ARMISelLowering.h:309
llvm::TargetLowering::LowerCallTo
std::pair< SDValue, SDValue > LowerCallTo(CallLoweringInfo &CLI) const
This function lowers an abstract call to a function into an actual call.
Definition: SelectionDAGBuilder.cpp:9538
llvm::SelectionDAG::getSubtarget
const TargetSubtargetInfo & getSubtarget() const
Definition: SelectionDAG.h:442
llvm::SelectionDAG::getContext
LLVMContext * getContext() const
Definition: SelectionDAG.h:447
llvm::SelectionDAG
This is used to represent a portion of an LLVM function in a low-level Data Dependence DAG representa...
Definition: SelectionDAG.h:216
llvm::TargetLowering
This class defines information used to lower LLVM code to legal SelectionDAG operators that the targe...
Definition: TargetLowering.h:3189
llvm::SelectionDAG::MaskedValueIsZero
bool MaskedValueIsZero(SDValue Op, const APInt &Mask, unsigned Depth=0) const
Return true if 'Op & Mask' is known to be zero.
Definition: SelectionDAG.cpp:2485
llvm::TargetLowering::CallLoweringInfo::setDebugLoc
CallLoweringInfo & setDebugLoc(const SDLoc &dl)
Definition: TargetLowering.h:3786
Align
uint64_t Align
Definition: ELFObjHandler.cpp:83
llvm::Align
This struct is a compact representation of a valid (non-zero power of two) alignment.
Definition: Alignment.h:39
llvm::TargetLowering::CallLoweringInfo::setLibCallee
CallLoweringInfo & setLibCallee(CallingConv::ID CC, Type *ResultType, SDValue Target, ArgListTy &&ArgsList)
Definition: TargetLowering.h:3797
llvm::MachinePointerInfo
This class contains a discriminated union of information about pointers in memory operands,...
Definition: MachineMemOperand.h:38
move
compiles ldr LCPI1_0 ldr ldr mov lsr tst moveq r1 ldr LCPI1_1 and r0 bx lr It would be better to do something like to fold the shift into the conditional move
Definition: README.txt:546
llvm::TargetLowering::CallLoweringInfo
This structure contains all information that is necessary for lowering calls.
Definition: TargetLowering.h:3747
llvm::TargetLoweringBase::ArgListEntry
Definition: TargetLowering.h:274
llvm::APInt
Class for arbitrary precision integers.
Definition: APInt.h:75
llvm::TargetLoweringBase::ArgListTy
std::vector< ArgListEntry > ArgListTy
Definition: TargetLowering.h:304
llvm::DataLayout::getIntPtrType
IntegerType * getIntPtrType(LLVMContext &C, unsigned AddressSpace=0) const
Returns an integer type with size at least as big as that of a pointer in the given address space.
Definition: DataLayout.cpp:839
llvm::TargetLowering::CallLoweringInfo::setDiscardResult
CallLoweringInfo & setDiscardResult(bool Value=true)
Definition: TargetLowering.h:3866
llvm::SelectionDAG::getDataLayout
const DataLayout & getDataLayout() const
Definition: SelectionDAG.h:440
llvm::SDValue
Unlike LLVM values, Selection DAG nodes may return multiple values as the result of a computation.
Definition: SelectionDAGNodes.h:138
XCoreTargetMachine.h
llvm::Type::getVoidTy
static Type * getVoidTy(LLVMContext &C)
Definition: Type.cpp:224
llvm::TargetSubtargetInfo::getTargetLowering
virtual const TargetLowering * getTargetLowering() const
Definition: TargetSubtargetInfo.h:96
llvm::SelectionDAG::getExternalSymbol
SDValue getExternalSymbol(const char *Sym, EVT VT)
Definition: SelectionDAG.cpp:1758
llvm::AMDGPU::HSAMD::Kernel::Key::Args
constexpr char Args[]
Key for Kernel::Metadata::mArgs.
Definition: AMDGPUMetadata.h:389
llvm::TargetLoweringBase::getLibcallCallingConv
CallingConv::ID getLibcallCallingConv(RTLIB::Libcall Call) const
Get the CallingConv that should be used for the specified libcall.
Definition: TargetLowering.h:2881
llvm::TargetLoweringBase::getPointerTy
virtual MVT getPointerTy(const DataLayout &DL, uint32_t AS=0) const
Return the pointer type for the given address space, defaults to the pointer type from the data layou...
Definition: TargetLowering.h:346