[wasm] simpler detection if we compiled asm-wasm

src/compiler.cc

 // Copyright 2012 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/compiler.h"
 
 #include <algorithm>
 #include <memory>
 
 #include "src/asmjs/asm-js.h"
@@ skipping 1348 matching lines @@
   if (callback == NULL) {
     // No callback set and code generation disallowed.
     return false;
   } else {
     // Callback set. Let it decide if code generation is allowed.
     VMState<EXTERNAL> state(isolate);
     return callback(v8::Utils::ToLocal(context));
   }
 }
 
-bool ContainsAsmModule(const Scope* scope, Zone* zone) {
-  DCHECK_NOT_NULL(scope);
-  DCHECK_NOT_NULL(zone);
-  ZoneQueue<const Scope*> worklist(zone);
-  // We assume scopes form a tree, so no need to check for cycles
-  worklist.push(scope);
-  while (!worklist.empty()) {
-    const Scope* s = worklist.front();
-    worklist.pop();
-    if (s->IsAsmModule()) {
-      return true;
-    }
-    for (const Scope* child = s->inner_scope(); child != nullptr;
-         child = child->sibling()) {
-      worklist.push(child);
-    }
+bool ContainsAsmModule(Handle<Script> script) {
+  DisallowHeapAllocation no_gc;
+  SharedFunctionInfo::ScriptIterator iter(script);
+  while (SharedFunctionInfo* info = iter.Next()) {
+    if (info->HasAsmWasmData()) return true;
   }
   return false;
 }
 
 }  // namespace
 
 MaybeHandle<JSFunction> Compiler::GetFunctionFromString(
     Handle<Context> context, Handle<String> source,
     ParseRestriction restriction) {
   Isolate* const isolate = context->GetIsolate();
@@ skipping 126 matching lines @@
       info.PrepareForSerializing();
     }
 
     parse_info.set_language_mode(
         static_cast<LanguageMode>(parse_info.language_mode() | language_mode));
     result = CompileToplevel(&info);
     if (extension == NULL && !result.is_null()) {
       compilation_cache->PutScript(source, context, language_mode, result);
       if (FLAG_serialize_toplevel &&
           compile_options == ScriptCompiler::kProduceCodeCache &&
-          !ContainsAsmModule(info.scope(), &zone)) {
+          !ContainsAsmModule(script)) {
         HistogramTimerScope histogram_timer(
             isolate->counters()->compile_serialize());
         RuntimeCallTimerScope runtimeTimer(isolate,
                                            &RuntimeCallStats::CompileSerialize);
         TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"),
                      "V8.CompileSerialize");
         *cached_data = CodeSerializer::Serialize(isolate, result, source);
         if (FLAG_profile_deserialization) {
           PrintF("[Compiling and serializing took %0.3f ms]\n",
                  timer.Elapsed().InMillisecondsF());
@@ skipping 212 matching lines @@
     DCHECK(shared->is_compiled());
     function->set_literals(cached.literals);
   } else if (shared->is_compiled()) {
     // TODO(mvstanton): pass pretenure flag to EnsureLiterals.
     JSFunction::EnsureLiterals(function);
   }
 }
 
 }  // namespace internal
 }  // namespace v8