Support checked mode for VM tests on ARM.

runtime/vm/assembler_arm.cc

 // Copyright (c) 2013, 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_ARM)
 
 #include "vm/assembler.h"
 #include "vm/simulator.h"
 #include "vm/runtime_entry.h"
@@ skipping 1278 matching lines @@
 }
 
 
 void Assembler::CompareObject(Register rn, const Object& object) {
   ASSERT(rn != IP);
   LoadObject(IP, object);
   cmp(rn, ShifterOperand(IP));
 }
 
 
+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;
+  ldrh(result, FieldAddress(object, class_id_offset));
+}
+
+
+void Assembler::LoadClassById(Register result, Register class_id) {
+  ASSERT(result != class_id);
+  ldr(result, FieldAddress(CTX, Context::isolate_offset()));
+  const intptr_t table_offset_in_isolate =
+      Isolate::class_table_offset() + ClassTable::table_offset();
+  ldr(result, Address(result, table_offset_in_isolate));
+  ldr(result, Address(result, class_id, LSL, 2));
+}
+
+
+void Assembler::LoadClass(Register result, Register object, Register scratch) {
+  ASSERT(scratch != result);
+  LoadClassId(scratch, object);
+
+  ldr(result, FieldAddress(CTX, Context::isolate_offset()));
+  const intptr_t table_offset_in_isolate =
+      Isolate::class_table_offset() + ClassTable::table_offset();
+  ldr(result, Address(result, table_offset_in_isolate));
+  ldr(result, Address(result, scratch, LSL, 2));
+}
+
+
+void Assembler::CompareClassId(Register object,
+                               intptr_t class_id,
+                               Register scratch) {
+  LoadClassId(scratch, object);
+  CompareImmediate(scratch, class_id);
+}
+
+
 void Assembler::Bind(Label* label) {
   ASSERT(!label->IsBound());
   int bound_pc = buffer_.Size();
   while (label->IsLinked()) {
     int32_t position = label->Position();
     int32_t next = buffer_.Load<int32_t>(position);
     int32_t encoded = Assembler::EncodeBranchOffset(bound_pc - position, next);
     buffer_.Store<int32_t>(position, encoded);
     label->position_ = Assembler::DecodeBranchOffset(next);
   }
@@ skipping 654 matching lines @@
   // Do not reuse an existing entry, since each reference may be patched
   // independently.
   object_pool_.Add(smi, Heap::kOld);
   return object_pool_.Length() - 1;
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM