LLVM  10.0.0svn
WebAssemblySelectionDAGInfo.cpp
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1 //===-- WebAssemblySelectionDAGInfo.cpp - WebAssembly 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 /// \file
10 /// This file implements the WebAssemblySelectionDAGInfo class.
11 ///
12 //===----------------------------------------------------------------------===//
13 
15 using namespace llvm;
16 
17 #define DEBUG_TYPE "wasm-selectiondag-info"
18 
20 
22  SelectionDAG &DAG, const SDLoc &DL, SDValue Chain, SDValue Dst, SDValue Src,
23  SDValue Size, unsigned Align, bool IsVolatile, bool AlwaysInline,
24  MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const {
25  if (!DAG.getMachineFunction()
27  .hasBulkMemory())
28  return SDValue();
29 
30  SDValue MemIdx = DAG.getConstant(0, DL, MVT::i32);
31  return DAG.getNode(WebAssemblyISD::MEMORY_COPY, DL, MVT::Other,
32  {Chain, MemIdx, MemIdx, Dst, Src,
33  DAG.getZExtOrTrunc(Size, DL, MVT::i32)});
34 }
35 
37  SelectionDAG &DAG, const SDLoc &DL, SDValue Chain, SDValue Op1, SDValue Op2,
38  SDValue Op3, unsigned Align, bool IsVolatile,
39  MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const {
40  return EmitTargetCodeForMemcpy(DAG, DL, Chain, Op1, Op2, Op3, Align,
41  IsVolatile, false, DstPtrInfo,
42  SrcPtrInfo);
43 }
44 
46  SelectionDAG &DAG, const SDLoc &DL, SDValue Chain, SDValue Dst, SDValue Val,
47  SDValue Size, unsigned Align, bool IsVolatile,
48  MachinePointerInfo DstPtrInfo) const {
49  if (!DAG.getMachineFunction()
51  .hasBulkMemory())
52  return SDValue();
53 
54  SDValue MemIdx = DAG.getConstant(0, DL, MVT::i32);
55  // Only low byte matters for val argument, so anyext the i8
56  return DAG.getNode(WebAssemblyISD::MEMORY_FILL, DL, MVT::Other, Chain, MemIdx,
57  Dst, DAG.getAnyExtOrTrunc(Val, DL, MVT::i32),
58  DAG.getZExtOrTrunc(Size, DL, MVT::i32));
59 }
This class represents lattice values for constants.
Definition: AllocatorList.h:23
constexpr char IsVolatile[]
Key for Kernel::Arg::Metadata::mIsVolatile.
SDValue getNode(unsigned Opcode, const SDLoc &DL, EVT VT, ArrayRef< SDUse > Ops)
Gets or creates the specified node.
This file declares the WebAssembly-specific subclass of TargetMachine.
MachineFunction & getMachineFunction() const
Definition: SelectionDAG.h:410
const TargetSubtargetInfo & getSubtarget() const
getSubtarget - Return the subtarget for which this machine code is being compiled.
SDValue EmitTargetCodeForMemmove(SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Op1, SDValue Op2, SDValue Op3, unsigned Align, bool isVolatile, MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const override
Emit target-specific code that performs a memmove.
SDValue EmitTargetCodeForMemset(SelectionDAG &DAG, const SDLoc &DL, SDValue Chain, SDValue Op1, SDValue Op2, SDValue Op3, unsigned Align, bool IsVolatile, MachinePointerInfo DstPtrInfo) const override
Emit target-specific code that performs a memset.
This class contains a discriminated union of information about pointers in memory operands...
This struct is a compact representation of a valid (non-zero power of two) alignment.
Definition: Alignment.h:40
SDValue EmitTargetCodeForMemcpy(SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Op1, SDValue Op2, SDValue Op3, unsigned Align, bool isVolatile, bool AlwaysInline, MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const override
Emit target-specific code that performs a memcpy.
This is used to represent a portion of an LLVM function in a low-level Data Dependence DAG representa...
Definition: SelectionDAG.h:221
SDValue getZExtOrTrunc(SDValue Op, const SDLoc &DL, EVT VT)
Convert Op, which must be of integer type, to the integer type VT, by either zero-extending or trunca...
Wrapper class for IR location info (IR ordering and DebugLoc) to be passed into SDNode creation funct...
uint32_t Size
Definition: Profile.cpp:46
SDValue getConstant(uint64_t Val, const SDLoc &DL, EVT VT, bool isTarget=false, bool isOpaque=false)
Create a ConstantSDNode wrapping a constant value.
SDValue getAnyExtOrTrunc(SDValue Op, const SDLoc &DL, EVT VT)
Convert Op, which must be of integer type, to the integer type VT, by either any-extending or truncat...
Unlike LLVM values, Selection DAG nodes may return multiple values as the result of a computation...