Dedup stackmaps.

runtime/vm/object.h

 // 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.
 
 #ifndef VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 3937 matching lines @@
     ASSERT(value <= kMaxUint32);
     StoreNonPointer(&raw_ptr()->pc_offset_, value);
   }
 
   intptr_t RegisterBitCount() const { return raw_ptr()->register_bit_count_; }
   void SetRegisterBitCount(intptr_t register_bit_count) const {
     ASSERT(register_bit_count < kMaxInt32);
     StoreNonPointer(&raw_ptr()->register_bit_count_, register_bit_count);
   }
 
+  bool Equals(const Stackmap& other) const {
+    if (Length() != other.Length()) {
+      return false;
+    }
+    NoSafepointScope no_safepoint;
+    return memcmp(raw_ptr(), other.raw_ptr(), InstanceSize(Length())) == 0;
+  }
+
   static const intptr_t kMaxLengthInBytes = kSmiMax;
 
   static intptr_t InstanceSize() {
     ASSERT(sizeof(RawStackmap) == OFFSET_OF_RETURNED_VALUE(RawStackmap, data));
     return 0;
   }
   static intptr_t InstanceSize(intptr_t length) {
     ASSERT(length >= 0);
     // The stackmap payload is in an array of bytes.
     intptr_t payload_size =
@@ skipping 4183 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_