X64 Crankshaft: Implement LValueOf and (dummy) LArgumentsObject.

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 1447 matching lines @@
 }
 
 
 LInstruction* LChunkBuilder::DoPixelArrayLength(HPixelArrayLength* instr) {
   LOperand* array = UseRegisterAtStart(instr->value());
   return DefineAsRegister(new LPixelArrayLength(array));
 }
 
 
 LInstruction* LChunkBuilder::DoValueOf(HValueOf* instr) {
-  Abort("Unimplemented: %s", "DoValueOf");
-  return NULL;
+  LOperand* object = UseRegister(instr->value());
+  LValueOf* result = new LValueOf(object);
+  return AssignEnvironment(DefineSameAsFirst(result));
 }
 
 
 LInstruction* LChunkBuilder::DoBoundsCheck(HBoundsCheck* instr) {
   return AssignEnvironment(new LBoundsCheck(UseRegisterAtStart(instr->index()),
                                             Use(instr->length())));
 }
 
 
 LInstruction* LChunkBuilder::DoAbnormalExit(HAbnormalExit* instr) {
@@ skipping 343 matching lines @@
 }
 
 
 LInstruction* LChunkBuilder::DoCallStub(HCallStub* instr) {
   argument_count_ -= instr->argument_count();
   return MarkAsCall(DefineFixed(new LCallStub, rax), instr);
 }
 
 
 LInstruction* LChunkBuilder::DoArgumentsObject(HArgumentsObject* instr) {
-  Abort("Unimplemented: %s", "DoArgumentsObject");
+  // There are no real uses of the arguments object.
+  // arguments.length and element access are supported directly on
+  // stack arguments, and any real arguments object use causes a bailout.
+  // So this value is never used.
   return NULL;
 }
 
 
 LInstruction* LChunkBuilder::DoAccessArgumentsAt(HAccessArgumentsAt* instr) {
   LOperand* arguments = UseRegister(instr->arguments());
   LOperand* length = UseTempRegister(instr->length());
   LOperand* index = Use(instr->index());
   LAccessArgumentsAt* result = new LAccessArgumentsAt(arguments, length, index);
   return AssignEnvironment(DefineAsRegister(result));
@@ skipping 69 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