Fix performance regression in regular expressions after Array.push() optimizations

src/code-stubs-hydrogen.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 "v8.h"
 
 #include "code-stubs.h"
 #include "hydrogen.h"
 #include "lithium.h"
 
@@ skipping 1465 matching lines @@
 }
 
 
 template<>
 HValue* CodeStubGraphBuilder<RegExpConstructResultStub>::BuildCodeStub() {
   // Determine the parameters.
   HValue* length = GetParameter(RegExpConstructResultStub::kLength);
   HValue* index = GetParameter(RegExpConstructResultStub::kIndex);
   HValue* input = GetParameter(RegExpConstructResultStub::kInput);
 
+  info()->MarkMustNotHaveEagerFrame();
+
   return BuildRegExpConstructResult(length, index, input);
 }
 
 
 Handle<Code> RegExpConstructResultStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 
 
 } }  // namespace v8::internal