Implement a 'trial parse' step, that will abort pre-parsing excessively

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 "src/ast-numbering.h"
 #include "src/bootstrapper.h"
@@ skipping 1353 matching lines @@
     // In that case the vector will be replaced the next time MakeCode is
     // called.
     info.EnsureFeedbackVector();
     scope_info = Handle<ScopeInfo>(ScopeInfo::Empty(isolate));
   } else if (Renumber(info.parse_info()) &&
              FullCodeGenerator::MakeCode(&info)) {
     // MakeCode will ensure that the feedback vector is present and
     // appropriately sized.
     DCHECK(!info.code().is_null());
     scope_info = ScopeInfo::Create(info.isolate(), info.zone(), info.scope());
+    if (literal->should_eager_compile() &&
+        literal->should_be_used_once_hint()) {
+      info.code()->MarkToBeExecutedOnce(isolate);
+    }
   } else {
     return Handle<SharedFunctionInfo>::null();
   }
 
   // Create a shared function info object.
   Handle<SharedFunctionInfo> result = factory->NewSharedFunctionInfo(
       literal->name(), literal->materialized_literal_count(), literal->kind(),
       info.code(), scope_info, info.feedback_vector());
 
   SharedFunctionInfo::InitFromFunctionLiteral(result, literal);
@@ skipping 162 matching lines @@
 }
 
 
 #if DEBUG
 void CompilationInfo::PrintAstForTesting() {
   PrintF("--- Source from AST ---\n%s\n",
          PrettyPrinter(isolate(), zone()).PrintProgram(function()));
 }
 #endif
 } }  // namespace v8::internal