Turbofan: Modify WASM linkage to store floats using only 4 bytes.

src/compiler/wasm-linkage.cc

Index: src/compiler/wasm-linkage.cc
diff --git a/src/compiler/wasm-linkage.cc b/src/compiler/wasm-linkage.cc
index 02412eb25b3c7731b6330157fdb5593f7450dc08..14d7e93d84cc029ea066bcc5194c599ca962a466 100644
--- a/src/compiler/wasm-linkage.cc
+++ b/src/compiler/wasm-linkage.cc
@@ -199,11 +199,7 @@ struct Allocator {
     return type == kAstF32 || type == kAstF64;
   }
   int Words(LocalType type) {
-    // The code generation for pushing parameters on the stack does not
-    // distinguish between float32 and float64. Therefore also float32 needs
-    // two words.
-    if (kPointerSize < 8 &&
-        (type == kAstI64 || type == kAstF64 || type == kAstF32)) {
+    if (kPointerSize < 8 && (type == kAstI64 || type == kAstF64)) {
       return 2;
     }
     return 1;