Avoid inserting new temporaries because of HTypeConversion nodes.

lib/compiler/implementation/ssa/optimize.dart

 // Copyright (c) 2011, 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 573 matching lines @@
     HStatic interceptor = new HStatic(lengthInterceptor);
     node.block.addBefore(node, interceptor);
     HInvokeInterceptor length = new HInvokeInterceptor(
         Selector.INVOCATION_0,
         const SourceString("length"),
         <HInstruction>[interceptor, receiver],
         getter: true);
     length.propagatedType = HType.INTEGER;
     node.block.addBefore(node, length);
 
-    HBoundsCheck check = new HBoundsCheck(length, index);
+    HBoundsCheck check = new HBoundsCheck(index, length);
     node.block.addBefore(node, check);
     return check;
   }
 
   HIntegerCheck insertIntegerCheck(HInstruction node, HInstruction value) {
     HIntegerCheck check = new HIntegerCheck(value);
     node.block.addBefore(node, check);
     return check;
   }
 
@@ skipping 483 matching lines @@
         // 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);
       }
       // TODO(ngeoffray): Also change uses for the then block on a HType
       // that knows it is not of a specific Type.
     }
   }
 }