Support %_CallFunction in optimized code.

src/arm/full-codegen-arm.cc

 // Copyright 2011 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 3143 matching lines @@
   ASSERT(args->length() == 1);
   VisitForStackValue(args->at(0));
   __ CallRuntime(Runtime::kMath_sqrt, 1);
   context()->Plug(r0);
 }
 
 
 void FullCodeGenerator::EmitCallFunction(ZoneList<Expression*>* args) {
   ASSERT(args->length() >= 2);
 
-  int arg_count = args->length() - 2;  // For receiver and function.
-  VisitForStackValue(args->at(0));  // Receiver.
-  for (int i = 0; i < arg_count; i++) {
-    VisitForStackValue(args->at(i + 1));
+  int arg_count = args->length() - 2;  // 2 ~ receiver and function.
+  for (int i = 0; i < arg_count + 1; i++) {
+    VisitForStackValue(args->at(i));
   }
-  VisitForAccumulatorValue(args->at(arg_count + 1));  // Function.
+  VisitForAccumulatorValue(args->last());  // Function.
 
-  // InvokeFunction requires function in r1. Move it in there.
-  if (!result_register().is(r1)) __ mov(r1, result_register());
+  // InvokeFunction requires the function in r1. Move it in there.
+  __ mov(r1, result_register());
   ParameterCount count(arg_count);
   __ InvokeFunction(r1, count, CALL_FUNCTION);
   __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
   context()->Plug(r0);
 }
 
 
 void FullCodeGenerator::EmitRegExpConstructResult(ZoneList<Expression*>* args) {
   RegExpConstructResultStub stub;
   ASSERT(args->length() == 3);
@@ skipping 1181 matching lines @@
   __ mov(r1, Operand(r1, ASR, 1));  // Un-smi-tag value.
   __ add(pc, r1, Operand(masm_->CodeObject()));
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM