Faster invocation of custom comparator function.

src/arm/codegen-arm.cc

Index: src/arm/codegen-arm.cc
diff --git a/src/arm/codegen-arm.cc b/src/arm/codegen-arm.cc
index 60bc84820ca0bfa0dbe5e43dc979a6481724f0e4..cda846d1c848f27752eca729e8b3bc653cbfac26 100644
--- a/src/arm/codegen-arm.cc
+++ b/src/arm/codegen-arm.cc
@@ -3709,6 +3709,22 @@ 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
+  frame_->CallJSFunction(n_args);
+  frame_->EmitPush(r0);
+}
+
+
 void CodeGenerator::GenerateMathSin(ZoneList<Expression*>* args) {
   ASSERT_EQ(args->length(), 1);
   // Load the argument on the stack and jump to the runtime.