[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

1 files changed, 3 insertions, 1 deletions

diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
index ca13161afb5..a4246eb8eb9 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
@@ -245,11 +245,13 @@ WebAssemblyTargetLowering::WebAssemblyTargetLowering(
   setMaxAtomicSizeInBitsSupported(64);
 
   if (Subtarget->hasBulkMemory()) {
-    // Using memory.copy is always better than using multiple loads and stores
+    // Use memory.copy and friends over multiple loads and stores
     MaxStoresPerMemcpy = 1;
     MaxStoresPerMemcpyOptSize = 1;
     MaxStoresPerMemmove = 1;
     MaxStoresPerMemmoveOptSize = 1;
+    MaxStoresPerMemset = 1;
+    MaxStoresPerMemsetOptSize = 1;
   }
 }