Restructure instance calls in optimizing compiler.

vm/assembler_ia32.cc

 // Copyright (c) 2011, 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"
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/assembler.h"
 #include "vm/heap.h"
 #include "vm/memory_region.h"
@@ skipping 1213 matching lines @@
 
 void Assembler::LoadObject(Register dst, const Object& object) {
   ASSERT(object.IsZoneHandle());
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   EmitUint8(0xB8 + dst);
   buffer_.EmitObject(object);
 }
 
 
 void Assembler::PushObject(const Object& object) {
+  ASSERT(object.IsZoneHandle());
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   EmitUint8(0x68);
   buffer_.EmitObject(object);
 }
 
 
 void Assembler::CompareObject(Register reg, const Object& object) {
+  ASSERT(object.IsZoneHandle());
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   if (reg == EAX) {
     EmitUint8(0x05 + (7 << 3));
     buffer_.EmitObject(object);
   } else {
     EmitUint8(0x81);
     EmitOperand(7, Operand(reg));
     buffer_.EmitObject(object);
   }
 }
@@ skipping 203 matching lines @@
                                  Register shifter) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   ASSERT(shifter == ECX);
   EmitUint8(0xD3);
   EmitOperand(rm, Operand(operand));
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32