Compress deopt instructions in memory using variable length encoding.

runtime/vm/code_generator.cc

 // Copyright (c) 2013, 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/code_generator.h"
 
 #include "vm/assembler.h"
 #include "vm/ast.h"
 #include "vm/code_patcher.h"
 #include "vm/compiler.h"
@@ skipping 1418 matching lines @@
       UNREACHABLE();
       return "";
   }
 }
 
 
 void DeoptimizeAt(const Code& optimized_code, uword pc) {
   ASSERT(optimized_code.is_optimized());
   ICData::DeoptReasonId deopt_reason = ICData::kDeoptUnknown;
   uint32_t deopt_flags = 0;
-  const DeoptInfo& deopt_info = DeoptInfo::Handle(
+  const TypedData& deopt_info = TypedData::Handle(
       optimized_code.GetDeoptInfoAtPc(pc, &deopt_reason, &deopt_flags));
   ASSERT(!deopt_info.IsNull());
   const Function& function = Function::Handle(optimized_code.function());
   Compiler::EnsureUnoptimizedCode(Thread::Current(), function);
   const Code& unoptimized_code = Code::Handle(function.unoptimized_code());
   ASSERT(!unoptimized_code.IsNull());
   // The switch to unoptimized code may have already occurred.
   if (function.HasOptimizedCode()) {
     function.SwitchToUnoptimizedCode();
   }
@@ skipping 222 matching lines @@
   const intptr_t elm_size = old_data.ElementSizeInBytes();
   const TypedData& new_data =
       TypedData::Handle(TypedData::New(cid, new_size, Heap::kOld));
   TypedData::Copy(new_data, 0, old_data, 0, old_size * elm_size);
   typed_data_cell.SetAt(0, new_data);
   arguments.SetReturn(new_data);
 }
 
 
 }  // namespace dart