[runtime] First step to sanitize regexp literal creation.

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 5756 matching lines @@
   DCHECK(current_block()->HasPredecessor());
   HConstant* instr = New<HConstant>(expr->value());
   return ast_context()->ReturnInstruction(instr, expr->id());
 }
 
 
 void HOptimizedGraphBuilder::VisitRegExpLiteral(RegExpLiteral* expr) {
   DCHECK(!HasStackOverflow());
   DCHECK(current_block() != NULL);
   DCHECK(current_block()->HasPredecessor());
-  Handle<JSFunction> closure = function_state()->compilation_info()->closure();
-  Handle<LiteralsArray> literals(closure->literals());
-  HRegExpLiteral* instr = New<HRegExpLiteral>(literals,
-                                              expr->pattern(),
-                                              expr->flags(),
-                                              expr->literal_index());
+  Callable callable = CodeFactory::FastCloneRegExp(isolate());
+  HValue* values[] = {
+      context(), AddThisFunction(), Add<HConstant>(expr->literal_index()),
+      Add<HConstant>(expr->pattern()), Add<HConstant>(expr->flags())};
+  HConstant* stub_value = Add<HConstant>(callable.code());
+  HInstruction* instr = New<HCallWithDescriptor>(
+      stub_value, 0, callable.descriptor(),
+      Vector<HValue*>(values, arraysize(values)), NORMAL_CALL);
   return ast_context()->ReturnInstruction(instr, expr->id());
 }
 
 
 static bool CanInlinePropertyAccess(Handle<Map> map) {
   if (map->instance_type() == HEAP_NUMBER_TYPE) return true;
   if (map->instance_type() < FIRST_NONSTRING_TYPE) return true;
   return map->IsJSObjectMap() && !map->is_dictionary_map() &&
          !map->has_named_interceptor() &&
          // TODO(verwaest): Whitelist contexts to which we have access.
@@ skipping 7842 matching lines @@
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 }  // namespace internal
 }  // namespace v8