[vm] Rename *MintOp to *Int64Op to emphasis that they operate on unboxed values.

runtime/vm/locations.h

 // 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.
 
 #ifndef RUNTIME_VM_LOCATIONS_H_
 #define RUNTIME_VM_LOCATIONS_H_
 
 #include "vm/allocation.h"
 #include "vm/assembler.h"
 #include "vm/bitfield.h"
 #include "vm/log.h"
 
 namespace dart {
 
 class BufferFormatter;
 class ConstantInstr;
 class Definition;
 class PairLocation;
 class Value;
 
 enum Representation {
   kNoRepresentation,
   kTagged,
   kUntagged,
   kUnboxedDouble,
   kUnboxedInt32,
   kUnboxedUint32,
-  kUnboxedMint,
+  kUnboxedInt64,
   kUnboxedFloat32x4,
   kUnboxedInt32x4,
   kUnboxedFloat64x2,
   kPairOfTagged,
   kNumRepresentations
 };
 
 // Location objects are used to connect register allocator and code generator.
 // Instruction templates used by code generator have a corresponding
 // LocationSummary object which specifies expected location for every input
@@ skipping 624 matching lines @@
   RegisterSet live_registers_;
 
 #if defined(DEBUG)
   intptr_t writable_inputs_;
 #endif
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_LOCATIONS_H_