Turn RegExpConstructResultStub into a HydrogenCodeStub.

src/code-stubs-hydrogen.cc

Index: src/code-stubs-hydrogen.cc
diff --git a/src/code-stubs-hydrogen.cc b/src/code-stubs-hydrogen.cc
index 5b1ae39c7dd6727cf95574968674346c4a836f88..c2bd7e4cfef63f1e2a481ee1c4239c79eb7bc280 100644
--- a/src/code-stubs-hydrogen.cc
+++ b/src/code-stubs-hydrogen.cc
@@ -1399,4 +1399,20 @@ Handle<Code> KeyedLoadDictionaryElementStub::GenerateCode(Isolate* isolate) {
 }
 
 
+template<>
+HValue* CodeStubGraphBuilder<RegExpConstructResultStub>::BuildCodeStub() {
+  // Determine the parameters.
+  HValue* length = GetParameter(RegExpConstructResultStub::kLength);
+  HValue* index = GetParameter(RegExpConstructResultStub::kIndex);
+  HValue* input = GetParameter(RegExpConstructResultStub::kInput);
+
+  return BuildRegExpConstructResult(length, index, input);
+}
+
+
+Handle<Code> RegExpConstructResultStub::GenerateCode(Isolate* isolate) {
+  return DoGenerateCode(isolate, this);
+}
+
+
 } }  // namespace v8::internal