Restrict immediate operands to smi where only smis are supported.

runtime/vm/locations.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_LOCATIONS_H_
 #define VM_LOCATIONS_H_
 
 #include "vm/allocation.h"
 #include "vm/assembler.h"
 #include "vm/bitfield.h"
@@ skipping 246 matching lines @@
 
 
   intptr_t stack_index() const {
     ASSERT(IsStackSlot() || IsDoubleStackSlot());
     // Decode stack index manually to preserve sign.
     return IndexField::decode(payload()) - kStackIndexBias;
   }
 
   // Constants.
   static Location RegisterOrConstant(Value* value);
+  static Location RegisterOrSmiConstant(Value* value);
   static Location FixedRegisterOrConstant(Value* value, Register reg);
+  static Location FixedRegisterOrSmiConstant(Value* value, Register reg);
 
   const char* Name() const;
   void PrintTo(BufferFormatter* f) const;
   void Print() const;
 
   // Compare two locations.
   bool Equals(Location other) const {
     return value_ == other.value_;
   }
 
@@ skipping 189 matching lines @@
   BitmapBuilder* stack_bitmap_;
 
   const ContainsCall contains_call_;
   RegisterSet live_registers_;
 };
 
 
 }  // namespace dart
 
 #endif  // VM_LOCATIONS_H_