Faster invocation of custom comparator function.

src/ia32/codegen-ia32.cc

Index: src/ia32/codegen-ia32.cc
diff --git a/src/ia32/codegen-ia32.cc b/src/ia32/codegen-ia32.cc
index a51edb37cede965c734112deb0ba4d6ec04d9378..4d6cb31208485daa83afa9a345b06fa5e2a76f83 100644
--- a/src/ia32/codegen-ia32.cc
+++ b/src/ia32/codegen-ia32.cc
@@ -6522,6 +6522,22 @@ void CodeGenerator::GenerateNumberToString(ZoneList<Expression*>* args) {
 }
 
 
+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