Avoid inlining constants that are used via a deferred import.

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 652 matching lines @@
       return range;
     }
 
     Range range = ranges[phi.inputs[0]];
     for (int i = 1; i < phi.inputs.length; i++) {
       range = range.union(ranges[phi.inputs[i]]);
     }
     return range;
   }
 
-  Range visitConstant(HConstant constant) {
-    if (!constant.isInteger(compiler)) return info.newUnboundRange();
-    NumConstant constantNum = constant.constant;
+  Range visitConstant(HConstant hConstant) {
+    if (!hConstant.isInteger(compiler)) return info.newUnboundRange();
+    Constant constant = hConstant.constant;
+    NumConstant constantNum;
+    if (constant is DeferredConstant) {
+      constantNum = constant.referenced;
+    } else {
+      constantNum = constant;
+    }
     if (constantNum.isMinusZero) constantNum = new IntConstant(0);
     Value value = info.newIntValue(constantNum.value);
     return info.newNormalizedRange(value, value);
   }
 
   Range visitFieldGet(HFieldGet fieldGet) {
     if (!fieldGet.isInteger(compiler)) return info.newUnboundRange();
     if (!fieldGet.receiver.isIndexablePrimitive(compiler)) {
       return visitInstruction(fieldGet);
     }
@@ skipping 358 matching lines @@
   }
 
   Range handleBinaryOperation(HBinaryArithmetic instruction) {
     Range leftRange = visit(instruction.left);
     Range rightRange = visit(instruction.right);
     if (leftRange == null || rightRange == null) return null;
     BinaryOperation operation = instruction.operation(info.constantSystem);
     return operation.apply(leftRange, rightRange);
   }
 }