remove HIf.hasElse.

lib/compiler/implementation/ssa/optimize.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.
 
 interface OptimizationPhase {
   String get name();
   void visitGraph(HGraph graph);
 }
 
 class SsaOptimizerTask extends CompilerTask {
@@ skipping 1150 matching lines @@
 
     if (ifUsers.isEmpty() && notIfUsers.isEmpty()) return;
 
     for (HIf ifUser in ifUsers) {
       changeUsesDominatedBy(ifUser.thenBlock, input, convertedType);
       // TODO(ngeoffray): Also change uses for the else block on a HType
       // that knows it is not of a specific Type.
     }
 
     for (HIf ifUser in notIfUsers) {
-      if (ifUser.hasElse) {
-        changeUsesDominatedBy(ifUser.elseBlock, input, convertedType);
-      } else if (ifUser.joinBlock.predecessors.length == 1) {
-        // If the join block has only one predecessor, then we know
-        // the if block terminates. So any use of the instruction
-        // after the join block should be changed to the new
-        // instruction.
-        changeUsesDominatedBy(ifUser.joinBlock, input, convertedType);
-      }
+      changeUsesDominatedBy(ifUser.elseBlock, input, convertedType);
       // TODO(ngeoffray): Also change uses for the then block on a HType
       // that knows it is not of a specific Type.
     }
   }
 }
 
 class SsaProcessRecompileCandidates
       extends HBaseVisitor implements OptimizationPhase {
   final String name = "SsaProcessRecompileCandidates";
   final JavaScriptBackend backend;
@@ skipping 82 matching lines @@
             break;
           default:
             assert(false);
             break;
         }
       }
     }
   }
 
 }