[wasm] asm.js - Remove Wasm.instantiateModuleFromAsm, use asm.js directly.

src/asmjs/asm-wasm-builder.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 // Required to get M_E etc. in MSVC.
 #if defined(_WIN32)
 #define _USE_MATH_DEFINES
 #endif
@@ skipping 812 matching lines @@
     }
 
     if (target_var == nullptr && target_prop == nullptr) {
       UNREACHABLE();  // invalid assignment.
     }
   }
 
   void VisitAssignment(Assignment* expr) {
     bool as_init = false;
     if (scope_ == kModuleScope) {
+      // Skip extra assignment inserted by the parser when in this form:
+      // (function Module(a, b, c) {... })
+      if (expr->target()->IsVariableProxy() &&
+          expr->target()->AsVariableProxy()->var()->mode() == CONST_LEGACY) {
+        return;
+      }
       Property* prop = expr->value()->AsProperty();
       if (prop != nullptr) {
         VariableProxy* vp = prop->obj()->AsVariableProxy();
         if (vp != nullptr && vp->var()->IsParameter() &&
             vp->var()->index() == 1) {
           VariableProxy* target = expr->target()->AsVariableProxy();
           if (typer_->TypeOf(target)->AsFFIType() != nullptr) {
             const AstRawString* name =
                 prop->key()->AsLiteral()->AsRawPropertyName();
             imported_function_table_.AddImport(
@@ skipping 939 matching lines @@
   AsmWasmBuilderImpl impl(isolate_, zone_, literal_, typer_);
   impl.Build();
   *foreign_args = impl.GetForeignArgs();
   ZoneBuffer* buffer = new (zone_) ZoneBuffer(zone_);
   impl.builder_->WriteTo(*buffer);
   return buffer;
 }
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8