DBC: Adds DecodeLoadObjectFromPoolOrThread, enables tests

runtime/vm/constants_dbc.h

 // Copyright (c) 2016, 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_CONSTANTS_DBC_H_
 #define VM_CONSTANTS_DBC_H_
 
 #include "platform/globals.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 450 matching lines @@
 #if defined(DEBUG)
     const Opcode op = DecodeOpcode(call);
     ASSERT((op == Bytecode::kStaticCall) ||
            (op == Bytecode::kInstanceCall) ||
            (op == Bytecode::kInstanceCall2) ||
            (op == Bytecode::kInstanceCall3) ||
            (op == Bytecode::kDebugBreak));
 #endif
     return (call >> 8) & 0xFF;
   }
+
+  static Instr At(uword pc) { return *reinterpret_cast<Instr*>(pc); }
+
+ private:
+  DISALLOW_ALLOCATION();
+  DISALLOW_IMPLICIT_CONSTRUCTORS(Bytecode);
 };
 
 // Various dummy declarations to make shared code compile.
 // TODO(vegorov) we need to prune away as much dead code as possible instead
 // of just making it compile.
 typedef int16_t Register;
 
 const int16_t FPREG = 0;
 const int16_t SPREG = 1;
 const intptr_t kNumberOfCpuRegisters = 20;
@@ skipping 12 matching lines @@
   kNumberOfDummyFpuRegisters,
 };
 const FpuRegister FpuTMP = kFakeFpuRegister;
 const intptr_t kNumberOfFpuRegisters = 1;
 
 enum Condition { EQ, NE };
 
 }  // namespace dart
 
 #endif  // VM_CONSTANTS_DBC_H_