1 files changed, 59 insertions, 0 deletions
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblySelectionDAGInfo.cpp b/llvm/lib/Target/WebAssembly/WebAssemblySelectionDAGInfo.cpp
new file mode 100644
index 000000000000..890e4b8e4e2a
--- /dev/null
+++ b/llvm/lib/Target/WebAssembly/WebAssemblySelectionDAGInfo.cpp
@@ -0,0 +1,59 @@
+//===-- WebAssemblySelectionDAGInfo.cpp - WebAssembly SelectionDAG Info ---===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// This file implements the WebAssemblySelectionDAGInfo class.
+///
+//===----------------------------------------------------------------------===//
+
+#include "WebAssemblyTargetMachine.h"
+using namespace llvm;
+
+#define DEBUG_TYPE "wasm-selectiondag-info"
+
+WebAssemblySelectionDAGInfo::~WebAssemblySelectionDAGInfo() = default; // anchor
+
+SDValue WebAssemblySelectionDAGInfo::EmitTargetCodeForMemcpy(
+    SelectionDAG &DAG, const SDLoc &DL, SDValue Chain, SDValue Dst, SDValue Src,
+    SDValue Size, unsigned Align, bool IsVolatile, bool AlwaysInline,
+    MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const {
+  if (!DAG.getMachineFunction()
+           .getSubtarget<WebAssemblySubtarget>()
+           .hasBulkMemory())
+    return SDValue();
+
+  SDValue MemIdx = DAG.getConstant(0, DL, MVT::i32);
+  return DAG.getNode(WebAssemblyISD::MEMORY_COPY, DL, MVT::Other,
+                     {Chain, MemIdx, MemIdx, Dst, Src,
+                      DAG.getZExtOrTrunc(Size, DL, MVT::i32)});
+}
+
+SDValue WebAssemblySelectionDAGInfo::EmitTargetCodeForMemmove(
+    SelectionDAG &DAG, const SDLoc &DL, SDValue Chain, SDValue Op1, SDValue Op2,
+    SDValue Op3, unsigned Align, bool IsVolatile,
+    MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const {
+  return EmitTargetCodeForMemcpy(DAG, DL, Chain, Op1, Op2, Op3, Align,
+                                 IsVolatile, false, DstPtrInfo,
+                                 SrcPtrInfo);
+}
+
+SDValue WebAssemblySelectionDAGInfo::EmitTargetCodeForMemset(
+    SelectionDAG &DAG, const SDLoc &DL, SDValue Chain, SDValue Dst, SDValue Val,
+    SDValue Size, unsigned Align, bool IsVolatile,
+    MachinePointerInfo DstPtrInfo) const {
+  if (!DAG.getMachineFunction()
+           .getSubtarget<WebAssemblySubtarget>()
+           .hasBulkMemory())
+    return SDValue();
+
+  SDValue MemIdx = DAG.getConstant(0, DL, MVT::i32);
+  // Only low byte matters for val argument, so anyext the i8
+  return DAG.getNode(WebAssemblyISD::MEMORY_FILL, DL, MVT::Other, Chain, MemIdx,
+                     Dst, DAG.getAnyExtOrTrunc(Val, DL, MVT::i32),
+                     DAG.getZExtOrTrunc(Size, DL, MVT::i32));
+}