Eliminate object table and use regular object pool for deoptimization infos.

runtime/vm/deopt_instructions.cc

Index: runtime/vm/deopt_instructions.cc
===================================================================
--- runtime/vm/deopt_instructions.cc	(revision 45086)
+++ runtime/vm/deopt_instructions.cc	(working copy)
@@ -27,7 +27,7 @@
                            fpu_register_t* fpu_registers,
                            intptr_t* cpu_registers)
     : code_(code.raw()),
-      object_table_(code.object_table()),
+      object_pool_(code.ObjectPool()),
       deopt_info_(TypedData::null()),
       dest_frame_is_allocated_(false),
       dest_frame_(NULL),
@@ -130,7 +130,7 @@
 
 
 void DeoptContext::VisitObjectPointers(ObjectPointerVisitor* visitor) {
-  visitor->VisitPointer(reinterpret_cast<RawObject**>(&object_table_));
+  visitor->VisitPointer(reinterpret_cast<RawObject**>(&object_pool_));
   visitor->VisitPointer(reinterpret_cast<RawObject**>(&deopt_info_));
 
   // Visit any object pointers on the destination stack.
@@ -916,12 +916,13 @@
 };
 
 
-DeoptInfoBuilder::DeoptInfoBuilder(Zone* zone, const intptr_t num_args)
+DeoptInfoBuilder::DeoptInfoBuilder(Zone* zone,
+                                   const intptr_t num_args,
+                                   Assembler* assembler)
     : zone_(zone),
       instructions_(),
-      object_table_(GrowableObjectArray::Handle(
-          GrowableObjectArray::New(Heap::kOld))),
       num_args_(num_args),
+      assembler_(assembler),
       trie_root_(new(zone) TrieNode()),
       current_info_number_(0),
       frame_start_(-1),
@@ -930,15 +931,7 @@
 
 
 intptr_t DeoptInfoBuilder::FindOrAddObjectInTable(const Object& obj) const {
-  for (intptr_t i = 0; i < object_table_.Length(); i++) {
-    if (object_table_.At(i) == obj.raw()) {
-      return i;
-    }
-  }
-  // Add object.
-  const intptr_t result = object_table_.Length();
-  object_table_.Add(obj, Heap::kOld);
-  return result;
+  return assembler_->object_pool().FindObject(obj, kNotPatchable);
 }