Add support for WritableRegister policy in the register allocator.

runtime/vm/flow_graph_compiler_ia32.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_IA32.
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "lib/error.h"
@@ skipping 888 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.
   __ movl(EAX, Address(ESP, 2 * kWordSize));  // Receiver.
   __ movl(EBX, Address(ESP, 1 * kWordSize));  // Value.
-  __ StoreIntoObject(EAX, FieldAddress(EAX, offset), EBX);
+  __ StoreIntoObject(EAX,

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

Why this change?

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

Initially I was also passing additional argument, but then I reverted that. 

Reverting reformatting.

+                     FieldAddress(EAX, offset),
+                     EBX);
   const Immediate raw_null =
       Immediate(reinterpret_cast<intptr_t>(Object::null()));
   __ movl(EAX, raw_null);
   __ ret();
 }
 
 
 void FlowGraphCompiler::GenerateInlinedMathSqrt(Label* done) {
   Label smi_to_double, double_op, call_method;
   __ movl(EAX, Address(ESP, 0));
@@ skipping 460 matching lines @@
   __ popl(ECX);
   __ popl(EAX);
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32