Fixes field access on MIPS for classes with many fields.

runtime/vm/assembler_mips.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_MIPS)
 
 #include "vm/assembler.h"
 #include "vm/longjump.h"
 #include "vm/runtime_entry.h"
@@ skipping 570 matching lines @@
     // Restore T0.
     lw(T0, Address(SP, 1 * kWordSize));
     addiu(SP, SP, Immediate(2 * kWordSize));
   } else {
     addiu(SP, SP, Immediate(1 * kWordSize));
   }
   Bind(&done);
 }
 
 
+void Assembler::StoreIntoObjectOffset(Register object,
+                                      int32_t offset,
+                                      Register value,
+                                      bool can_value_be_smi) {
+  if (Address::CanHoldOffset(offset - kHeapObjectTag)) {
+    StoreIntoObject(
+        object, FieldAddress(object, offset), value, can_value_be_smi);
+  } else {
+    AddImmediate(TMP, object, offset - kHeapObjectTag);
+    StoreIntoObject(object, Address(TMP), value, can_value_be_smi);
+  }
+}
+
+
 void Assembler::StoreIntoObjectNoBarrier(Register object,
                                          const Address& dest,
                                          Register value) {
   ASSERT(!in_delay_slot_);
   sw(value, dest);
 #if defined(DEBUG)
   Label done;
   StoreIntoObjectFilter(object, value, &done);
   Stop("Store buffer update is required");
   Bind(&done);
 #endif  // defined(DEBUG)
   // No store buffer update.
 }
 
 
+void Assembler::StoreIntoObjectNoBarrierOffset(Register object,
+                                               int32_t offset,
+                                               Register value) {
+  if (Address::CanHoldOffset(offset - kHeapObjectTag)) {
+    StoreIntoObjectNoBarrier(object, FieldAddress(object, offset), value);
+  } else {
+    AddImmediate(TMP, object, offset - kHeapObjectTag);
+    StoreIntoObjectNoBarrier(object, Address(TMP), value);
+  }
+}
+
+
 void Assembler::StoreIntoObjectNoBarrier(Register object,
                                          const Address& dest,
                                          const Object& value) {
   ASSERT(!in_delay_slot_);
   ASSERT(value.IsSmi() || value.InVMHeap() ||
          (value.IsOld() && value.IsNotTemporaryScopedHandle()));
   // No store buffer update.
   LoadObject(TMP, value);
   sw(TMP, dest);
 }
 
 
+void Assembler::StoreIntoObjectNoBarrierOffset(Register object,
+                                               int32_t offset,
+                                               const Object& value) {
+  if (Address::CanHoldOffset(offset - kHeapObjectTag)) {
+    StoreIntoObjectNoBarrier(object, FieldAddress(object, offset), value);
+  } else {
+    AddImmediate(TMP, object, offset - kHeapObjectTag);
+    StoreIntoObjectNoBarrier(object, Address(TMP), value);
+  }
+}
+
+
 void Assembler::LoadClassId(Register result, Register object) {
   ASSERT(RawObject::kClassIdTagPos == 16);
   ASSERT(RawObject::kClassIdTagSize == 16);
   const intptr_t class_id_offset = Object::tags_offset() +
       RawObject::kClassIdTagPos / kBitsPerByte;
   lhu(result, FieldAddress(object, class_id_offset));
 }
 
 
 void Assembler::LoadClassById(Register result, Register class_id) {
@@ skipping 475 matching lines @@
     Emit(reinterpret_cast<int32_t>(message));
     Bind(&msg);
     break_(Instr::kMsgMessageCode);
   }
 #endif
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS