Store arguments descriptor in ICData. Remove loading of arguments descriptor at unoptimized call si…

runtime/vm/code_patcher_arm.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_ARM.
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/code_patcher.h"
 
 #include "vm/instructions.h"
 #include "vm/object.h"
 
 namespace dart {
 
 RawArray* CodePatcher::GetClosureArgDescAt(uword return_address,
                                            const Code& code) {
   ASSERT(code.ContainsInstructionAt(return_address));
   CallPattern call(return_address, code);
-  return call.ArgumentsDescriptor();
+  return call.ClosureArgumentsDescriptor();
 }
 
 
 uword CodePatcher::GetStaticCallTargetAt(uword return_address,
                                          const Code& code) {
   ASSERT(code.ContainsInstructionAt(return_address));
   CallPattern call(return_address, code);
   return call.TargetAddress();
 }
 
@@ skipping 18 matching lines @@
 
 void CodePatcher::InsertCallAt(uword start, uword target) {
   // The inserted call should not overlap the lazy deopt jump code.
   ASSERT(start + CallPattern::kFixedLengthInBytes <= target);
   CallPattern::InsertAt(start, target);
 }
 
 
 uword CodePatcher::GetInstanceCallAt(uword return_address,
                                      const Code& code,
-                                     ICData* ic_data,
-                                     Array* arguments_descriptor) {
+                                     ICData* ic_data) {
   ASSERT(code.ContainsInstructionAt(return_address));
   CallPattern call(return_address, code);
   if (ic_data != NULL) {
     *ic_data = call.IcData();
   }
-  if (arguments_descriptor != NULL) {
-    *arguments_descriptor = call.ArgumentsDescriptor();
-  }
   return call.TargetAddress();
 }
 
 
 intptr_t CodePatcher::InstanceCallSizeInBytes() {
   // The instance call instruction sequence has a variable size on ARM.
   UNREACHABLE();
   return 0;
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM