Don't bother trying to reuse object pool entries for ICs, type test caches, or edge counters as the…

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"  // NOLINT
 #if defined(TARGET_ARCH_MIPS)
 
 #include "vm/assembler.h"
 #include "vm/longjump.h"
 #include "vm/runtime_entry.h"
@@ skipping 438 matching lines @@
     and_(ro, TMP, ro);
   } else {
     subu(rd, rs, rt);
     xor_(ro, rd, rs);
     xor_(TMP, rs, rt);
     and_(ro, TMP, ro);
   }
 }
 
 
-void Assembler::LoadObject(Register rd, const Object& object) {
+void Assembler::LoadObjectHelper(Register rd,
+                                 const Object& object,
+                                 bool is_unique) {
   ASSERT(!in_delay_slot_);
   // Smis and VM heap objects are never relocated; do not use object pool.
   if (object.IsSmi()) {
     LoadImmediate(rd, reinterpret_cast<int32_t>(object.raw()));
   } else if (object.InVMHeap() || !allow_constant_pool()) {
     // Make sure that class CallPattern is able to decode this load immediate.
     int32_t object_raw = reinterpret_cast<int32_t>(object.raw());
     const uint16_t object_low = Utils::Low16Bits(object_raw);
     const uint16_t object_high = Utils::High16Bits(object_raw);
     lui(rd, Immediate(object_high));
     ori(rd, rd, Immediate(object_low));
   } else {
     // Make sure that class CallPattern is able to decode this load from the
     // object pool.
-    const int32_t offset =
-        ObjectPool::element_offset(object_pool_wrapper_.FindObject(object));
+    const int32_t offset = ObjectPool::element_offset(
+        is_unique ? object_pool_wrapper_.AddObject(object)
+                  : object_pool_wrapper_.FindObject(object));
     LoadWordFromPoolOffset(rd, offset - kHeapObjectTag);
   }
 }
 
 
+void Assembler::LoadObject(Register rd, const Object& object) {
+  LoadObjectHelper(rd, object, false);
+}
+
+
+void Assembler::LoadUniqueObject(Register rd, const Object& object) {
+  LoadObjectHelper(rd, object, true);
+}
+
+
 void Assembler::LoadExternalLabel(Register rd,
                                   const ExternalLabel* label,
                                   Patchability patchable) {
   const int32_t offset = ObjectPool::element_offset(
       object_pool_wrapper_.FindExternalLabel(label, patchable));
   LoadWordFromPoolOffset(rd, offset - kHeapObjectTag);
 }
 
 
 void Assembler::PushObject(const Object& object) {
@@ skipping 732 matching lines @@
   Label stop;
   b(&stop);
   Emit(reinterpret_cast<int32_t>(message));
   Bind(&stop);
   break_(Instr::kStopMessageCode);
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS