Remove the 'element' field on a HParameterValue to use the 'sourceElement' of HInstruction. Also, w…

lib/compiler/implementation/ssa/variable_allocator.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.
 
 /**
  * The [LiveRange] class covers a range where an instruction is live.
  */
 class LiveRange {
   final int start;
   // [end] is not final because it can be updated due to loops.
@@ skipping 426 matching lines @@
       // Special case the check instruction to use the name of its
       // checked instruction.
       HCheck check = instruction;
       name = names.ownName[check.checkedInput];
       // If the name is null, then the checked input is being
       // generated at use site, and we don't need a name for the check
       // instruction.
       if (name == null) return null;
     } else if (instruction is HParameterValue) {
       HParameterValue parameter = instruction;
-      name = parameterNames[parameter.element];
+      name = parameterNames[parameter.sourceElement];
       if (name == null) {
-        name = allocateWithHint(parameter.element.name.slowToString());
+        name = allocateWithHint(parameter.sourceElement.name.slowToString());
       }
     } else if (instruction.sourceElement !== null) {
       name = allocateWithHint(instruction.sourceElement.name.slowToString());
     } else {
       // We could not find an element for the instruction. If the
       // instruction is used by a phi, try to use the name of the phi.
       // Otherwise, just allocate a temporary name.
       HPhi phi = firstPhiUserWithElement(instruction);
       if (phi !== null) {
         name = allocateWithHint(phi.sourceElement.name.slowToString());
@@ skipping 111 matching lines @@
       if (!needsName(input)) {
         names.addAssignment(predecessor, input, phi);
       } else {
         names.addCopy(predecessor, input, phi);
       }
     }
 
     namer.allocateName(phi);
   }
 }