Remove DebuggerEvent. Refactor remaining code.

runtime/vm/flow_graph_range_analysis_test.cc

 // 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.
 
 #include "vm/flow_graph_range_analysis.h"
 #include "vm/unit_test.h"
 
 namespace dart {
 
 TEST_CASE(RangeTests) {
@@ skipping 58 matching lines @@
                 RangeBoundary(-60), RangeBoundary(-20));
   TEST_RANGE_OP(Range::Shl, 5, 10, -2, 2,
                 RangeBoundary(5), RangeBoundary(40));
   TEST_RANGE_OP(Range::Shl, -15, 100, 0, 64,
                 RangeBoundary::NegativeInfinity(),
                 RangeBoundary::PositiveInfinity());
   TEST_RANGE_OP(Range::Shl, -1, 1, 63, 63,
                 RangeBoundary(kMinInt64),
                 RangeBoundary::PositiveInfinity());
   if (kBitsPerWord == 64) {
+#if 0

[turnidge, 2016/05/12 20:06:05]

Ignore this change -- I need it because I am on the most recent xcode.  Will
revert it before I commit.

[turnidge, 2016/05/13 15:49:35]

I fixed the warning I was seeing in the most recent xcode as part of this cl. 
For the record, it was a complaint that shifting a signed negative number is
undefined.

     TEST_RANGE_OP_SMI(Range::Shl, -1, 1, 62, 62,
                   RangeBoundary(kSmiMin),
-                  RangeBoundary(kSmiMax));
+                  RangeBoundary(kSmiMax));
     TEST_RANGE_OP_SMI(Range::Shl, -1, 1, 30, 30,
                   RangeBoundary(-1 << 30),
-                  RangeBoundary(1 << 30));
+                  RangeBoundary(1 << 30));
+#endif
   } else {
     TEST_RANGE_OP_SMI(Range::Shl, -1, 1, 30, 30,
                   RangeBoundary(kSmiMin),
                   RangeBoundary(kSmiMax));
     TEST_RANGE_OP_SMI(Range::Shl, -1, 1, 62, 62,
                   RangeBoundary(kSmiMin),
                   RangeBoundary(kSmiMax));
   }
   TEST_RANGE_OP(Range::Shl, 0, 100, 0, 64,
                 RangeBoundary(0), RangeBoundary::PositiveInfinity());
@@ skipping 604 matching lines @@
       p_infinity,
       size).IsMaximumOrAbove(size));
 
   EXPECT(RangeBoundary::JoinMax(
       p_infinity,
       RangeBoundary::FromConstant(1),
       size).IsMaximumOrAbove(size));
 }
 
 }  // namespace dart