Move inlined type checking code to new compiler ia32. Sharing more and more code between ia32/x64 (…

runtime/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 1560 matching lines @@
 
 void Assembler::LoadClassId(Register result, Register object) {
   ASSERT(RawObject::kClassIdTagBit == 16);
   ASSERT(RawObject::kClassIdTagSize == 16);
   const intptr_t class_id_offset = Object::tags_offset() +
       RawObject::kClassIdTagBit / kBitsPerByte;
   movzxw(result, FieldAddress(object, class_id_offset));
 }
 
 
+void Assembler::LoadClassById(Register result, Register class_id) {
+  ASSERT(result != class_id);
+  movl(result, FieldAddress(CTX, Context::isolate_offset()));
+  const intptr_t table_offset_in_isolate =
+      Isolate::class_table_offset() + ClassTable::table_offset();
+  movl(result, Address(result, table_offset_in_isolate));
+  movl(result, Address(result, class_id, TIMES_4, 0));
+}
+
+
 void Assembler::LoadClass(Register result,
                           Register object,
                           Register scratch) {
   ASSERT(scratch != result);
   LoadClassId(scratch, object);
 
   movl(result, FieldAddress(CTX, Context::isolate_offset()));
   const intptr_t table_offset_in_isolate =
       Isolate::class_table_offset() + ClassTable::table_offset();
   movl(result, Address(result, table_offset_in_isolate));
@@ skipping 32 matching lines @@
     comments.SetCommentAt(i, comments_[i]->comment());
   }
 
   return comments;
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32