Disable x64 disassembler under win32.

runtime/vm/assembler_macros_x64.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_X64)
+
+#include "vm/assembler_macros.h"
+
+#include "vm/assembler.h"
+
+namespace dart {
+
+DECLARE_FLAG(bool, inline_alloc);
+
+#define __ assembler->
+
+// Static.
+void AssemblerMacros::TryAllocate(Assembler* assembler,
+                                  const Class& cls,
+                                  Register class_reg,
+                                  Label* failure,
+                                  Register instance_reg) {
+#if defined(DEBUG)
+  __ Untested("AssemblerMacros::TryAllocate");
+  Label ok;
+  __ LoadObject(instance_reg, cls);
+  __ cmpl(instance_reg, class_reg);
+  __ j(EQUAL, &ok, Assembler::kNearJump);
+  __ Stop("AssemblerMacros::TryAllocate, wrong arguments");
+  __ Bind(&ok);
+#endif
+  ASSERT(failure != NULL);
+  ASSERT(class_reg != instance_reg);
+  if (FLAG_inline_alloc) {
+    Heap* heap = Isolate::Current()->heap();
+    const intptr_t instance_size = cls.instance_size();
+    __ movq(instance_reg, Address::Absolute(heap->TopAddress()));
+    __ addq(instance_reg, Immediate(instance_size));
+    // instance_reg: potential next object start.
+    __ cmpq(instance_reg, Address::Absolute(heap->EndAddress()));
+    __ j(ABOVE_EQUAL, failure, Assembler::kNearJump);
+    // Successfully allocated the object, now update top to point to
+    // next object start and store the class in the class field of object.
+    __ movq(Address::Absolute(heap->TopAddress()), instance_reg);
+    ASSERT(instance_size >= kHeapObjectTag);
+    __ subq(instance_reg, Immediate(instance_size - kHeapObjectTag));
+    __ movq(FieldAddress(instance_reg, Instance::class_offset()), class_reg);
+  } else {
+    __ jmp(failure);
+  }
+}
+
+#undef __
+
+}  // namespace dart
+
+#endif  // defined TARGET_ARCH_X64