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"
15using namespace llvm;
16
17#define DEBUG_TYPE "wasm-selectiondag-info"
18
19WebAssemblySelectionDAGInfo::~WebAssemblySelectionDAGInfo() = default; // anchor
20
21SDValue 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
36SDValue 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
45SDValue 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}
60