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

runtime/vm/assembler_x64.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_X64)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/heap.h"
@@ skipping 2816 matching lines @@
   // forces the address operand to use a fixed-size imm32 encoding.
   movq(dst, Address::AddressBaseImm32(pp, offset));
 }
 
 
 void Assembler::LoadIsolate(Register dst) {
   movq(dst, Address(THR, Thread::isolate_offset()));
 }
 
 
-void Assembler::LoadObject(Register dst, const Object& object, Register pp) {
+void Assembler::LoadObjectHelper(Register dst,
+                                 const Object& object,
+                                 Register pp,
+                                 bool is_unique) {
   if (CanLoadFromObjectPool(object)) {
-    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(dst, pp, offset - kHeapObjectTag);
   } else {
     ASSERT((Isolate::Current() == Dart::vm_isolate()) ||
            object.IsSmi() ||
            object.InVMHeap());
     LoadImmediate(dst, Immediate(reinterpret_cast<int64_t>(object.raw())), pp);
   }
 }
 
 
+void Assembler::LoadObject(Register dst, const Object& object, Register pp) {
+  LoadObjectHelper(dst, object, pp, false);
+}
+
+
+void Assembler::LoadUniqueObject(Register dst,
+                                 const Object& object,
+                                 Register pp) {
+  LoadObjectHelper(dst, object, pp, true);
+}
+
+
 void Assembler::StoreObject(const Address& dst, const Object& object,
                             Register pp) {
   if (CanLoadFromObjectPool(object)) {
     LoadObject(TMP, object, pp);
     movq(dst, TMP);
   } else {
     MoveImmediate(dst, Immediate(reinterpret_cast<int64_t>(object.raw())), pp);
   }
 }
 
@@ skipping 1063 matching lines @@
 
 
 const char* Assembler::FpuRegisterName(FpuRegister reg) {
   ASSERT((0 <= reg) && (reg < kNumberOfXmmRegisters));
   return xmm_reg_names[reg];
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64