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

lib/compiler/implementation/ssa/bailout.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 BailoutInfo {
   int instructionId;
   int bailoutId;
   BailoutInfo(this.instructionId, this.bailoutId);
 }
 
@@ skipping 97 matching lines @@
   bool typeGuardWouldBeValuable(HInstruction instruction,
                                 HType speculativeType) {
 
     Element source = instruction.sourceElement;
     // Do not insert a type guard if the instruction has a type
     // annotation that disagrees with the speculated type.
     if (source !== null) {
       Type sourceType = source.computeType(compiler);
       Type speculatedType = speculativeType.computeType(compiler);
       if (speculatedType !== null
-          && !compiler.types.isSubtype(speculatedType, sourceType)) {
+          && !compiler.types.isAssignable(speculatedType, sourceType)) {
         return false;
       }
     }
 
     bool isNested(HBasicBlock inner, HBasicBlock outer) {
       if (inner === outer) return false;
       if (outer === null) return true;
       while (inner !== null) {
         if (inner === outer) return true;
         inner = inner.parentLoopHeader;
@@ skipping 296 matching lines @@
       }
     }
   }
 
   visitTypeGuard(HTypeGuard guard) {
     blocks.forEach((HBasicBlock block) {
       block.guards.add(guard);
     });
   }
 }