Handle int/double case expression types correctly.

sdk/lib/_internal/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.
 
 part of ssa;
 
 /**
  * A special element for the extra parameter taken by intercepted
  * methods. We need to override [Element.computeType] because our
  * optimizers may look at its declared type.
@@ skipping 4414 matching lines @@
               compiler.constantHandler.compileNodeWithDefinitions(
                   match.expression, elements, isConst: true);
           if (firstConstantType == null) {
             firstConstantType = constant.computeType(compiler);
             if (nonPrimitiveTypeOverridesEquals(constant)) {
               compiler.reportFatalError(
                   match.expression,
                   MessageKind.SWITCH_CASE_VALUE_OVERRIDES_EQUALS);
               failure = true;
             }
-          } else {
-            DartType constantType =
-                constant.computeType(compiler);
-            if (constantType != firstConstantType) {
-              compiler.reportFatalError(
-                  match.expression,
-                  MessageKind.SWITCH_CASE_TYPES_NOT_EQUAL);
-              failure = true;
-            }
           }
           constants[labelOrCase] = constant;
         }
       }
     }
     return constants;
   }
 
   visitSwitchStatement(SwitchStatement node) {
     Map<CaseMatch,Constant> constants = buildSwitchCaseConstants(node);
@@ skipping 998 matching lines @@
           new HSubGraphBlockInformation(elseBranch.graph));
 
     HBasicBlock conditionStartBlock = conditionBranch.block;
     conditionStartBlock.setBlockFlow(info, joinBlock);
     SubGraph conditionGraph = conditionBranch.graph;
     HIf branch = conditionGraph.end.last;
     assert(branch is HIf);
     branch.blockInformation = conditionStartBlock.blockFlow;
   }
 }