remove HIf.hasElse.

lib/compiler/implementation/ssa/builder.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.
 
 class Interceptors {
   Compiler compiler;
   Interceptors(Compiler this.compiler);
 
   SourceString mapOperatorToMethodName(Operator op) {
     String name = op.source.stringValue;
@@ skipping 1560 matching lines @@
              () => visit(node.thenPart),
              node.elsePart != null ? () => visit(node.elsePart) : null);
   }
 
   void handleIf(void visitCondition(), void visitThen(), void visitElse()) {
     HBasicBlock conditionStartBlock = openNewBlock();
     visitCondition();
     SubExpression conditionGraph =
         new SubExpression(conditionStartBlock, lastOpenedBlock);
     HInstruction condition = popBoolified();
-    HIf branch = new HIf(condition, true);
+    HIf branch = new HIf(condition);
     HBasicBlock conditionBlock = close(branch);
 
     LocalsHandler savedLocals = new LocalsHandler.from(localsHandler);
 
     // The then part.
     HBasicBlock thenBlock = addNewBlock();
     conditionBlock.addSuccessor(thenBlock);
     open(thenBlock);
     visitThen();
     SubGraph thenGraph = new SubGraph(thenBlock, lastOpenedBlock);
@@ skipping 1886 matching lines @@
   void visitNodeList(NodeList node) {
      node.visitChildren(this);
   }
 
   HInstruction concat(HInstruction left, HInstruction right) {
     HInstruction instruction = new HStringConcat(left, right, diagnosticNode);
     builder.add(instruction);
     return instruction;
   }
 }