One instead of two runtime calls when initializing regexp.

src/compiler/linkage.cc

 // Copyright 2014 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/code-stubs.h"
 #include "src/compiler.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/node.h"
 #include "src/compiler/pipeline.h"
 #include "src/scopes.h"
@@ skipping 165 matching lines @@
     case Runtime::kNewObject:
     case Runtime::kNewObjectFromBound:
     case Runtime::kNewObjectWithAllocationSite:
     case Runtime::kObjectFreeze:
     case Runtime::kOwnKeys:
     case Runtime::kParseJson:
     case Runtime::kPrepareStep:
     case Runtime::kPreventExtensions:
     case Runtime::kPromiseRejectEvent:
     case Runtime::kPromiseRevokeReject:
-    case Runtime::kRegExpCompile:
+    case Runtime::kRegExpInitializeAndCompile:
     case Runtime::kRegExpExecMultiple:
     case Runtime::kResolvePossiblyDirectEval:
     case Runtime::kRunMicrotasks:
     case Runtime::kSetPrototype:
     case Runtime::kSetScriptBreakPoint:
     case Runtime::kSparseJoinWithSeparator:
     case Runtime::kStackGuard:
     case Runtime::kStoreKeyedToSuper_Sloppy:
     case Runtime::kStoreKeyedToSuper_Strict:
     case Runtime::kStoreToSuper_Sloppy:
@@ skipping 49 matching lines @@
 
 CallDescriptor* Linkage::GetSimplifiedCDescriptor(Zone* zone,
                                                   MachineSignature* sig) {
   UNIMPLEMENTED();
   return NULL;
 }
 #endif  // !V8_TURBOFAN_BACKEND
 }
 }
 }  // namespace v8::internal::compiler