Simplify dispatch in optimizing compile stubs.

src/x64/builtins-x64.cc

Index: src/x64/builtins-x64.cc
diff --git a/src/x64/builtins-x64.cc b/src/x64/builtins-x64.cc
index 2de13a0d329cfa43c0c6fb3ea601fff6cb59c75d..b39198c492ff32bfbb3a085bbb0f6299c20a550d 100644
--- a/src/x64/builtins-x64.cc
+++ b/src/x64/builtins-x64.cc
@@ -840,30 +840,14 @@ void Builtins::Generate_CompileLazy(MacroAssembler* masm) {
 }
 
 
-static void CallCompileOptimized(MacroAssembler* masm,
-                                            bool concurrent) {
-  FrameScope scope(masm, StackFrame::INTERNAL);
-  // Push a copy of the function onto the stack.
-  __ Push(rdi);
-  // Function is also the parameter to the runtime call.
-  __ Push(rdi);
-  // Whether to compile in a background thread.
-  __ Push(masm->isolate()->factory()->ToBoolean(concurrent));
-
-  __ CallRuntime(Runtime::kCompileOptimized, 2);
-  // Restore receiver.
-  __ Pop(rdi);
-}
-
-
 void Builtins::Generate_CompileOptimized(MacroAssembler* masm) {
-  CallCompileOptimized(masm, false);
+  CallRuntimePassFunction(masm, Runtime::kCompileOptimized_NotConcurrent);
   GenerateTailCallToReturnedCode(masm);
 }
 
 
 void Builtins::Generate_CompileOptimizedConcurrent(MacroAssembler* masm) {
-  CallCompileOptimized(masm, true);
+  CallRuntimePassFunction(masm, Runtime::kCompileOptimized_Concurrent);
   GenerateTailCallToReturnedCode(masm);
 }