Fix 64-bit bug in optimized class-check instructions.

runtime/vm/intermediate_language.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/intermediate_language.h"
 
 #include "vm/bit_vector.h"
 #include "vm/constant_propagator.h"
 #include "vm/cpu.h"
 #include "vm/dart_entry.h"
@@ skipping 199 matching lines @@
     return true;
   }
   return false;
 }
 
 
 intptr_t CheckClassInstr::ComputeCidMask() const {
   ASSERT(IsDenseSwitch());
   intptr_t mask = 0;
   for (intptr_t i = 0; i < cids_.length(); ++i) {
-    mask |= 1 << (cids_[i] - cids_[0]);
+    mask |= static_cast<intptr_t>(1) << (cids_[i] - cids_[0]);
   }
   return mask;
 }
 
 
 bool CheckClassInstr::IsDenseMask(intptr_t mask) {
   // Returns true if the mask is a continuos sequence of ones in its binary
   // representation (i.e. no holes)
   return mask == -1 || Utils::IsPowerOfTwo(mask + 1);
 }
@@ skipping 3259 matching lines @@
     case Token::kTRUNCDIV: return 0;
     case Token::kMOD: return 1;
     default: UNIMPLEMENTED(); return -1;
   }
 }
 
 
 #undef __
 
 }  // namespace dart