[WebAssembly] memory.fill
Summary:
memset lowering, fix argument types in memcpy lowering, and
test encodings. Depends on D57736.
Reviewers: aheejin
Subscribers: dschuff, sbc100, jgravelle-google, hiraditya, sunfish, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D57791
llvm-svn: 353986
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblySelectionDAGInfo.cpp b/llvm/lib/Target/WebAssembly/WebAssemblySelectionDAGInfo.cpp
index 34d93ec..890e4b8 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblySelectionDAGInfo.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblySelectionDAGInfo.cpp
@@ -41,3 +41,19 @@
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));
+}