VM: Share object pool entries for optimized static calls.

runtime/vm/assembler.cc

 // Copyright (c) 2012, 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/assembler.h"
 
 #include "platform/utils.h"
 #include "vm/cpu.h"
 #include "vm/heap.h"
 #include "vm/memory_region.h"
@@ skipping 226 matching lines @@
     comments.SetPCOffsetAt(i, comments_[i]->pc_offset());
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   }
 
   return comments;
 }
 
 
 intptr_t ObjectPoolWrapper::AddObject(const Object& obj,
                                       Patchability patchable) {
-  return AddObject(ObjectPool::Entry(&obj), patchable);
+  return AddObject(ObjectPoolWrapperEntry(&obj), patchable);
 }
 
 
 intptr_t ObjectPoolWrapper::AddImmediate(uword imm) {
-  return AddObject(ObjectPool::Entry(imm, ObjectPool::kImmediate),
+  return AddObject(ObjectPoolWrapperEntry(imm, ObjectPool::kImmediate),
                    kNotPatchable);
 }
 
-intptr_t ObjectPoolWrapper::AddObject(ObjectPool::Entry entry,
+intptr_t ObjectPoolWrapper::AddObject(ObjectPoolWrapperEntry entry,
                                       Patchability patchable) {
   object_pool_.Add(entry);
   if (patchable == kNotPatchable) {
     // The object isn't patchable. Record the index for fast lookup.
     object_pool_index_table_.Insert(
         ObjIndexPair(entry, object_pool_.length() - 1));
   }
   return object_pool_.length() - 1;
 }
 
 
-intptr_t ObjectPoolWrapper::FindObject(ObjectPool::Entry entry,
+intptr_t ObjectPoolWrapper::FindObject(ObjectPoolWrapperEntry entry,
                                        Patchability patchable) {
   // If the object is not patchable, check if we've already got it in the
   // object pool.
   if (patchable == kNotPatchable) {
     intptr_t idx = object_pool_index_table_.Lookup(entry);
     if (idx != ObjIndexPair::kNoIndex) {
       return idx;
     }
   }
 
   return AddObject(entry, patchable);
 }
 
 
 intptr_t ObjectPoolWrapper::FindObject(const Object& obj,
                                        Patchability patchable) {
-  return FindObject(ObjectPool::Entry(&obj), patchable);
+  return FindObject(ObjectPoolWrapperEntry(&obj), patchable);
+}
+
+
+intptr_t ObjectPoolWrapper::FindObject(const Object& obj,
+                                       const Object& equivalence) {
+  return FindObject(ObjectPoolWrapperEntry(&obj, &equivalence),
+                    kNotPatchable);
 }
 
 
 intptr_t ObjectPoolWrapper::FindImmediate(uword imm) {
-  return FindObject(ObjectPool::Entry(imm, ObjectPool::kImmediate),
+  return FindObject(ObjectPoolWrapperEntry(imm, ObjectPool::kImmediate),
                     kNotPatchable);
 }
 
 
 intptr_t ObjectPoolWrapper::FindNativeEntry(const ExternalLabel* label,
                                             Patchability patchable) {
-  return FindObject(ObjectPool::Entry(label->address(),
-                                      ObjectPool::kNativeEntry),
+  return FindObject(ObjectPoolWrapperEntry(label->address(),
+                                           ObjectPool::kNativeEntry),
                     patchable);
 }
 
 
 RawObjectPool* ObjectPoolWrapper::MakeObjectPool() {
   intptr_t len = object_pool_.length();
   if (len == 0) {
     return Object::empty_object_pool().raw();
   }
   const ObjectPool& result = ObjectPool::Handle(ObjectPool::New(len));
   const TypedData& info_array = TypedData::Handle(result.info_array());
   for (intptr_t i = 0; i < len; ++i) {
     ObjectPool::EntryType info = object_pool_[i].type_;
     info_array.SetInt8(i, static_cast<int8_t>(info));
     if (info == ObjectPool::kTaggedObject) {
       result.SetObjectAt(i, *object_pool_[i].obj_);
     } else {
       result.SetRawValueAt(i, object_pool_[i].raw_value_);
     }
   }
   return result.raw();
 }
 
 
 }  // namespace dart