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
EmitTargetCodeForMemcpy(SelectionDAG & DAG,const SDLoc & DL,SDValue Chain,SDValue Dst,SDValue Src,SDValue Size,Align Alignment,bool IsVolatile,bool AlwaysInline,MachinePointerInfo DstPtrInfo,MachinePointerInfo SrcPtrInfo) const21 SDValue WebAssemblySelectionDAGInfo::EmitTargetCodeForMemcpy(
22 SelectionDAG &DAG, const SDLoc &DL, SDValue Chain, SDValue Dst, SDValue Src,
23 SDValue Size, Align Alignment, bool IsVolatile, bool AlwaysInline,
24 MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const {
25 auto &ST = DAG.getMachineFunction().getSubtarget<WebAssemblySubtarget>();
26 if (!ST.hasBulkMemory())
27 return SDValue();
28
29 SDValue MemIdx = DAG.getConstant(0, DL, MVT::i32);
30 auto LenMVT = ST.hasAddr64() ? MVT::i64 : MVT::i32;
31 return DAG.getNode(WebAssemblyISD::MEMORY_COPY, DL, MVT::Other,
32 {Chain, MemIdx, MemIdx, Dst, Src,
33 DAG.getZExtOrTrunc(Size, DL, LenMVT)});
34 }
35
EmitTargetCodeForMemmove(SelectionDAG & DAG,const SDLoc & DL,SDValue Chain,SDValue Op1,SDValue Op2,SDValue Op3,Align Alignment,bool IsVolatile,MachinePointerInfo DstPtrInfo,MachinePointerInfo SrcPtrInfo) const36 SDValue WebAssemblySelectionDAGInfo::EmitTargetCodeForMemmove(
37 SelectionDAG &DAG, const SDLoc &DL, SDValue Chain, SDValue Op1, SDValue Op2,
38 SDValue Op3, Align Alignment, bool IsVolatile,
39 MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const {
40 return EmitTargetCodeForMemcpy(DAG, DL, Chain, Op1, Op2, Op3,
41 Alignment, IsVolatile, false,
42 DstPtrInfo, SrcPtrInfo);
43 }
44
EmitTargetCodeForMemset(SelectionDAG & DAG,const SDLoc & DL,SDValue Chain,SDValue Dst,SDValue Val,SDValue Size,Align Alignment,bool IsVolatile,MachinePointerInfo DstPtrInfo) const45 SDValue WebAssemblySelectionDAGInfo::EmitTargetCodeForMemset(
46 SelectionDAG &DAG, const SDLoc &DL, SDValue Chain, SDValue Dst, SDValue Val,
47 SDValue Size, Align Alignment, bool IsVolatile,
48 MachinePointerInfo DstPtrInfo) const {
49 auto &ST = DAG.getMachineFunction().getSubtarget<WebAssemblySubtarget>();
50 if (!ST.hasBulkMemory())
51 return SDValue();
52
53 SDValue MemIdx = DAG.getConstant(0, DL, MVT::i32);
54 auto LenMVT = ST.hasAddr64() ? MVT::i64 : 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, LenMVT));
59 }
60