Add lithium support for %_GetCachedArrayIndex for IA32 and X64

src/x64/lithium-x64.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 1506 matching lines @@
 LInstruction* LChunkBuilder::DoHasInstanceType(HHasInstanceType* instr) {
   ASSERT(instr->value()->representation().IsTagged());
   LOperand* value = UseRegisterAtStart(instr->value());
 
   return DefineAsRegister(new LHasInstanceType(value));
 }
 
 
 LInstruction* LChunkBuilder::DoGetCachedArrayIndex(
     HGetCachedArrayIndex* instr)  {
-  Abort("Unimplemented: %s", "DoGetCachedArrayIndex");
-  return NULL;
+  ASSERT(instr->value()->representation().IsTagged());
+  LOperand* value = UseRegisterAtStart(instr->value());
+
+  return DefineAsRegister(new LGetCachedArrayIndex(value));
 }
 
 
 LInstruction* LChunkBuilder::DoHasCachedArrayIndex(
     HHasCachedArrayIndex* instr) {
   ASSERT(instr->value()->representation().IsTagged());
   LOperand* value = UseRegister(instr->value());
   return DefineAsRegister(new LHasCachedArrayIndex(value));
 }
 
@@ skipping 496 matching lines @@
 
 LInstruction* LChunkBuilder::DoLeaveInlined(HLeaveInlined* instr) {
   HEnvironment* outer = current_block_->last_environment()->outer();
   current_block_->UpdateEnvironment(outer);
   return NULL;
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64