Add support for WritableRegister policy in the register allocator.

runtime/vm/flow_graph_compiler_x64.cc

 // Copyright (c) 2012, 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_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "lib/error.h"
@@ skipping 895 matching lines @@
 }
 
 
 void FlowGraphCompiler::GenerateInlinedSetter(intptr_t offset) {
   // TOS: return address.
   // +1 : value
   // +2 : receiver.
   // Sequence node has one store node and one return NULL node.
   __ movq(RAX, Address(RSP, 2 * kWordSize));  // Receiver.
   __ movq(RBX, Address(RSP, 1 * kWordSize));  // Value.
-  __ StoreIntoObject(RAX, FieldAddress(RAX, offset), RBX);
+  __ StoreIntoObject(RAX,

[Ivan Posva, 2012/09/11 11:57:30]

ditto

[Vyacheslav Egorov (Google), 2012/09/11 12:18:05]

reverted

+                     FieldAddress(RAX, offset),
+                     RBX);
   const Immediate raw_null =
       Immediate(reinterpret_cast<intptr_t>(Object::null()));
   __ movq(RAX, raw_null);
   __ ret();
 }
 
 
 void FlowGraphCompiler::GenerateInlinedMathSqrt(Label* done) {
   Label smi_to_double, double_op, call_method;
   __ movq(RAX, Address(RSP, 0));
@@ skipping 440 matching lines @@
 void ParallelMoveResolver::Exchange(const Address& mem1, const Address& mem2) {
   __ Exchange(mem1, mem2);
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64