Move relational operators to the new interceptors.

sdk/lib/_internal/compiler/implementation/ssa/value_range_analyzer.dart

 // 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.
 
 part of ssa;
 
 
 class ValueRangeInfo {
   final ConstantSystem constantSystem;
 
@@ skipping 688 matching lines @@
 
   Range visitRelational(HRelational relational) {
     HInstruction right = relational.right;
     HInstruction left = relational.left;
     if (!left.isInteger(types)) return info.newUnboundRange();
     if (!right.isInteger(types)) return info.newUnboundRange();
     BinaryOperation operation = relational.operation(constantSystem);
     Range rightRange = ranges[relational.right];
     Range leftRange = ranges[relational.left];
 
-    if (relational is HEquals || relational is HIdentity) {
+    if (relational is HIdentity) {
       handleEqualityCheck(relational);
     } else if (operation.apply(leftRange, rightRange)) {
       relational.block.rewrite(
           relational, graph.addConstantBool(true, constantSystem));
       relational.block.remove(relational);
     } else if (reverseOperation(operation).apply(leftRange, rightRange)) {
       relational.block.rewrite(
           relational, graph.addConstantBool(false, constantSystem));
       relational.block.remove(relational);
     }
@@ skipping 102 matching lines @@
     } else {
       range = info.newUnboundRange();
     }
     return range.intersection(leftRange);
   }
 
   Range visitConditionalBranch(HConditionalBranch branch) {
     var condition = branch.condition;
     // TODO(ngeoffray): Handle complex conditions.
     if (condition is !HRelational) return info.newUnboundRange();
-    if (condition is HEquals) return info.newUnboundRange();
     if (condition is HIdentity) return info.newUnboundRange();
     HInstruction right = condition.right;
     HInstruction left = condition.left;
     if (!left.isInteger(types)) return info.newUnboundRange();
     if (!right.isInteger(types)) return info.newUnboundRange();
 
     Range rightRange = ranges[right];
     Range leftRange = ranges[left];
     Operation operation = condition.operation(constantSystem);
     Operation reverse = reverseOperation(operation);
@@ skipping 144 matching lines @@
     if (instruction is HPhi && !instruction.block.isLoopHeader()) {
       HInstruction result = unwrap(instruction.inputs[0]);
       for (int i = 1; i < instruction.inputs.length; i++) {
         if (result != unwrap(instruction.inputs[i])) return instruction;
       }
       return result;
     }
     return instruction;
   }
 }