Faster invocation of custom comparator function.

src/ia32/codegen-ia32.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 6504 matching lines @@
   ASSERT_EQ(args->length(), 1);
 
   // Load the argument on the stack and call the stub.
   Load(args->at(0));
   NumberToStringStub stub;
   Result result = frame_->CallStub(&stub, 1);
   frame_->Push(&result);
 }
 
 
+void CodeGenerator::GenerateCallFunction(ZoneList<Expression*>* args) {
+  Comment cmnt(masm_, "[ GenerateCallFunction");
+
+  ASSERT(args->length() >= 2);
+
+  int n_args = args->length() - 2;  // for receiver and function.
+  Load(args->at(0));  // receiver
+  for (int i = 0; i < n_args; i++) {
+    Load(args->at(i + 1));
+  }
+  Load(args->at(n_args + 1));  // function
+  Result result = frame_->CallJSFunction(n_args);
+  frame_->Push(&result);
+}
+
+
 // Generates the Math.pow method - only handles special cases and branches to
 // the runtime system if not.Please note - this function assumes that
 // the callsite has executed ToNumber on both arguments and that the
 // arguments are not the same identifier.
 void CodeGenerator::GenerateMathPow(ZoneList<Expression*>* args) {
   ASSERT(args->length() == 2);
   Load(args->at(0));
   Load(args->at(1));
   if (!CpuFeatures::IsSupported(SSE2)) {
     Result res = frame_->CallRuntime(Runtime::kMath_pow, 2);
@@ skipping 6117 matching lines @@
 
   // Call the runtime; it returns -1 (less), 0 (equal), or 1 (greater)
   // tagged as a small integer.
   __ bind(&runtime);
   __ TailCallRuntime(Runtime::kStringCompare, 2, 1);
 }
 
 #undef __
 
 } }  // namespace v8::internal