38637ee477
In the same spirit as D73543 and in reply to https://reviews.llvm.org/D126768#3549920 this patch is adding support for `__builtin_memset_inline`. The idea is to get support from the compiler to easily write efficient memory function implementations. This patch could be split in two: - one for the LLVM part adding the `llvm.memset.inline.*` intrinsics. - and another one for the Clang part providing the instrinsic as a builtin. Differential Revision: https://reviews.llvm.org/D126903
60 lines
2.6 KiB
C++
60 lines
2.6 KiB
C++
//===-- WebAssemblySelectionDAGInfo.cpp - WebAssembly SelectionDAG Info ---===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// This file implements the WebAssemblySelectionDAGInfo class.
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///
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//===----------------------------------------------------------------------===//
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#include "WebAssemblyTargetMachine.h"
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using namespace llvm;
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#define DEBUG_TYPE "wasm-selectiondag-info"
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WebAssemblySelectionDAGInfo::~WebAssemblySelectionDAGInfo() = default; // anchor
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SDValue WebAssemblySelectionDAGInfo::EmitTargetCodeForMemcpy(
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SelectionDAG &DAG, const SDLoc &DL, SDValue Chain, SDValue Dst, SDValue Src,
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SDValue Size, Align Alignment, bool IsVolatile, bool AlwaysInline,
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MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const {
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auto &ST = DAG.getMachineFunction().getSubtarget<WebAssemblySubtarget>();
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if (!ST.hasBulkMemory())
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return SDValue();
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SDValue MemIdx = DAG.getConstant(0, DL, MVT::i32);
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auto LenMVT = ST.hasAddr64() ? MVT::i64 : MVT::i32;
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return DAG.getNode(WebAssemblyISD::MEMORY_COPY, DL, MVT::Other,
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{Chain, MemIdx, MemIdx, Dst, Src,
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DAG.getZExtOrTrunc(Size, DL, LenMVT)});
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}
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SDValue WebAssemblySelectionDAGInfo::EmitTargetCodeForMemmove(
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SelectionDAG &DAG, const SDLoc &DL, SDValue Chain, SDValue Op1, SDValue Op2,
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SDValue Op3, Align Alignment, bool IsVolatile,
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MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const {
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return EmitTargetCodeForMemcpy(DAG, DL, Chain, Op1, Op2, Op3,
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Alignment, IsVolatile, false,
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DstPtrInfo, SrcPtrInfo);
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}
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SDValue WebAssemblySelectionDAGInfo::EmitTargetCodeForMemset(
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SelectionDAG &DAG, const SDLoc &DL, SDValue Chain, SDValue Dst, SDValue Val,
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SDValue Size, Align Alignment, bool IsVolatile, bool AlwaysInline,
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MachinePointerInfo DstPtrInfo) const {
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auto &ST = DAG.getMachineFunction().getSubtarget<WebAssemblySubtarget>();
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if (!ST.hasBulkMemory())
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return SDValue();
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SDValue MemIdx = DAG.getConstant(0, DL, MVT::i32);
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auto LenMVT = ST.hasAddr64() ? MVT::i64 : MVT::i32;
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// Only low byte matters for val argument, so anyext the i8
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return DAG.getNode(WebAssemblyISD::MEMORY_FILL, DL, MVT::Other, Chain, MemIdx,
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Dst, DAG.getAnyExtOrTrunc(Val, DL, MVT::i32),
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DAG.getZExtOrTrunc(Size, DL, LenMVT));
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}
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