[wasm] Change the default lowering of stores.

src/compiler/int64-lowering.h

Index: src/compiler/int64-lowering.h
diff --git a/src/compiler/int64-lowering.h b/src/compiler/int64-lowering.h
index 66a54e9c3f9be2b2d595a4d69c0c562d197f0f0a..811c2b2046dc53c37cf21947e7d5556d37472f3a 100644
--- a/src/compiler/int64-lowering.h
+++ b/src/compiler/int64-lowering.h
@@ -47,7 +47,7 @@ class V8_EXPORT_PRIVATE Int64Lowering {
   void PrepareReplacements(Node* node);
   void PushNode(Node* node);
   void LowerNode(Node* node);
-  bool DefaultLowering(Node* node);
+  bool DefaultLowering(Node* node, bool low_word_only = false);
   void LowerComparison(Node* node, const Operator* signed_op,
                        const Operator* unsigned_op);
   void PrepareProjectionReplacements(Node* node);