RegExp: Add support for the ES6-proposed sticky flag

src/hydrogen.cc

 // Copyright 2013 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/hydrogen.h"
 
 #include <algorithm>
 
 #include "src/v8.h"
 
@@ skipping 9681 matching lines @@
 
 void HOptimizedGraphBuilder::GenerateTypedArrayMaxSizeInHeap(
     CallRuntime* expr) {
   DCHECK(expr->arguments()->length() == 0);
   HConstant* result = New<HConstant>(static_cast<int32_t>(
         FLAG_typed_array_max_size_in_heap));
   return ast_context()->ReturnInstruction(result, expr->id());
 }
 
 
+void HOptimizedGraphBuilder::GenerateHarmonyRegExps(
+    CallRuntime* expr) {
+  DCHECK(expr->arguments()->length() == 0);
+  HValue* value = FLAG_harmony_regexps
+      ? graph()->GetConstantTrue()
+      : graph()->GetConstantFalse();
+  return ast_context()->ReturnValue(value);
+}
+
+
 void HOptimizedGraphBuilder::GenerateArrayBufferGetByteLength(
     CallRuntime* expr) {
   DCHECK(expr->arguments()->length() == 1);
   CHECK_ALIVE(VisitForValue(expr->arguments()->at(0)));
   HValue* buffer = Pop();
   HInstruction* result = New<HLoadNamedField>(
     buffer,
     static_cast<HValue*>(NULL),
     HObjectAccess::ForJSArrayBufferByteLength());
   return ast_context()->ReturnInstruction(result, expr->id());
@@ skipping 2779 matching lines @@
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 } }  // namespace v8::internal