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

runtime/vm/assembler_arm64.cc

 // Copyright (c) 2014, 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_ARM64)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/longjump.h"
@@ skipping 439 matching lines @@
       object_pool_wrapper_.FindExternalLabel(label, patchable));
   LoadWordFromPoolOffsetFixed(dst, pp, offset);
 }
 
 
 void Assembler::LoadIsolate(Register dst, Register pp) {
   ldr(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 (CanLoadObjectFromPool(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);
   } else {
     ASSERT((Isolate::Current() == Dart::vm_isolate()) ||
            object.IsSmi() ||
            object.InVMHeap());
     LoadDecodableImmediate(dst, 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::CompareObject(Register reg, const Object& object, Register pp) {
   if (CanLoadObjectFromPool(object)) {
     LoadObject(TMP, object, pp);
     CompareRegisters(reg, TMP);
   } else {
     CompareImmediate(reg, reinterpret_cast<int64_t>(object.raw()), pp);
   }
 }
 
 
@@ skipping 973 matching lines @@
     add(base, array, Operand(index, LSL, shift));
   }
   const OperandSize size = Address::OperandSizeFor(cid);
   ASSERT(Address::CanHoldOffset(offset, Address::Offset, size));
   return Address(base, offset, Address::Offset, size);
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64