Object pool with support for untagged entries.

runtime/vm/code_patcher_mips.cc

Index: runtime/vm/code_patcher_mips.cc
diff --git a/runtime/vm/code_patcher_mips.cc b/runtime/vm/code_patcher_mips.cc
index 95d220bbf3553fecda5790c77518d590e9691513..1794ab857d6b2d71b74e1b3871080cebb000a941 100644
--- a/runtime/vm/code_patcher_mips.cc
+++ b/runtime/vm/code_patcher_mips.cc
@@ -84,7 +84,8 @@ RawFunction* CodePatcher::GetUnoptimizedStaticCallAt(
 class EdgeCounter : public ValueObject {
  public:
   EdgeCounter(uword pc, const Code& code)
-      : end_(pc - kAdjust), object_pool_(Array::Handle(code.ObjectPool())) {
+      : end_(pc - kAdjust),
+        object_pool_(ObjectPool::Handle(code.GetObjectPool())) {
     // An IsValid predicate is complicated and duplicates the code in the
     // decoding function.  Instead we rely on decoding the pattern which
     // will assert partial validity.
@@ -95,7 +96,7 @@ class EdgeCounter : public ValueObject {
     intptr_t index;
     InstructionPattern::DecodeLoadWordFromPool(end_, &ignored, &index);
     ASSERT(ignored == T0);
-    return object_pool_.At(index);
+    return object_pool_.ObjectAt(index);
   }
 
  private:
@@ -107,7 +108,7 @@ class EdgeCounter : public ValueObject {
   static const intptr_t kAdjust = 3 * Instr::kInstrSize;
 
   uword end_;
-  const Array& object_pool_;
+  const ObjectPool& object_pool_;
 };