[wasm] Add utilities to print out WASM ast directly from the bytes.

src/compiler/arm64/code-generator-arm64.cc

Index: src/compiler/arm64/code-generator-arm64.cc
diff --git a/src/compiler/arm64/code-generator-arm64.cc b/src/compiler/arm64/code-generator-arm64.cc
index ca0e4c7c3b03661456309b09693bb78fecc774ba..749f581f696d50953de8ee75c3129082fa9838c9 100644
--- a/src/compiler/arm64/code-generator-arm64.cc
+++ b/src/compiler/arm64/code-generator-arm64.cc
@@ -1491,13 +1491,14 @@ void CodeGenerator::AssembleReturn() {
       __ Bind(&return_label_);
       if (descriptor->UseNativeStack()) {
         __ Mov(csp, fp);
+        pop_count += (pop_count & 1);  // align
       } else {
         __ Mov(jssp, fp);
       }
       __ Pop(fp, lr);
     }
   } else if (descriptor->UseNativeStack()) {
-    pop_count += (pop_count & 1);
+    pop_count += (pop_count & 1);  // align
   }
   __ Drop(pop_count);
   __ Ret();