Infer range for BIT_XOR.

runtime/vm/flow_graph_range_analysis.h

 // Copyright (c) 2014, 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_FLOW_GRAPH_RANGE_ANALYSIS_H_
 #define VM_FLOW_GRAPH_RANGE_ANALYSIS_H_
 
 #include "vm/flow_graph.h"
 #include "vm/intermediate_language.h"
 
@@ skipping 441 matching lines @@
   static void Shl(const Range* left_range,
                   const Range* right_range,
                   RangeBoundary* min,
                   RangeBoundary* max);
 
   static bool And(const Range* left_range,
                   const Range* right_range,
                   RangeBoundary* min,
                   RangeBoundary* max);
 
+  static void Xor(const Range* left_range,
+                  const Range* right_range,
+                  RangeBoundary* min,
+                  RangeBoundary* max);
 
   // Both the a and b ranges are >= 0.
   static bool OnlyPositiveOrZero(const Range& a, const Range& b);
 
   // Both the a and b ranges are <= 0.
   static bool OnlyNegativeOrZero(const Range& a, const Range& b);
 
   // Return the maximum absolute value included in range.
   static int64_t ConstantAbsMax(const Range* range);
 
@@ skipping 178 matching lines @@
   BitVector* selected_uint32_defs_;
 
   FlowGraph* flow_graph_;
   Isolate* isolate_;
 };
 
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_RANGE_ANALYSIS_H_