Use in-object fields instead of private symbols for regexp slots.

src/crankshaft/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/crankshaft/hydrogen.h"
 
 #include <sstream>
 
 #include "src/allocation-site-scopes.h"
 #include "src/ast-numbering.h"
@@ skipping 12626 matching lines @@
 // Support for direct calls from JavaScript to native RegExp code.
 void HOptimizedGraphBuilder::GenerateRegExpExec(CallRuntime* call) {
   DCHECK_EQ(4, call->arguments()->length());
   CHECK_ALIVE(VisitExpressions(call->arguments()));
   PushArgumentsFromEnvironment(call->arguments()->length());
   HCallStub* result = New<HCallStub>(CodeStub::RegExpExec, 4);
   return ast_context()->ReturnInstruction(result, call->id());
 }
 
 
+void HOptimizedGraphBuilder::GenerateRegExpFlags(CallRuntime* call) {
+  DCHECK_EQ(1, call->arguments()->length());
+  CHECK_ALIVE(VisitExpressions(call->arguments()));
+  HValue* regexp = Pop();
+  HValue* result =
+      New<HLoadNamedField>(regexp, nullptr, HObjectAccess::ForJSRegExpFlags());
+  return ast_context()->ReturnInstruction(result, call->id());
+}
+
+
 void HOptimizedGraphBuilder::GenerateDoubleLo(CallRuntime* call) {
   DCHECK_EQ(1, call->arguments()->length());
   CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));
   HValue* value = Pop();
   HInstruction* result = NewUncasted<HDoubleBits>(value, HDoubleBits::LOW);
   return ast_context()->ReturnInstruction(result, call->id());
 }
 
 
 void HOptimizedGraphBuilder::GenerateDoubleHi(CallRuntime* call) {
@@ skipping 1024 matching lines @@
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 }  // namespace internal
 }  // namespace v8