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, 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 36 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 45 SDValue WebAssemblySelectionDAGInfo::EmitTargetCodeForMemset( 46 SelectionDAG &DAG, const SDLoc &DL, SDValue Chain, SDValue Dst, SDValue Val, 47 SDValue Size, Align Alignment, bool IsVolatile, bool AlwaysInline, 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