lib/Target/WebAssembly/WebAssemblySelectionDAGInfo.cpp

   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
  14 #include "WebAssemblyTargetMachine.h"
  15 using namespace llvm;
  16
  17 #define DEBUG_TYPE "wasm-selectiondag-info"
  18
  19 WebAssemblySelectionDAGInfo::~WebAssemblySelectionDAGInfo() = default; // anchor
  20
  21 SDValue WebAssemblySelectionDAGInfo::EmitTargetCodeForMemcpy(
  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()
  26            .getSubtarget<WebAssemblySubtarget>()
  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
  36 SDValue WebAssemblySelectionDAGInfo::EmitTargetCodeForMemmove(
  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
  45 SDValue WebAssemblySelectionDAGInfo::EmitTargetCodeForMemset(
  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()
  50            .getSubtarget<WebAssemblySubtarget>()
  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 }