Revert r31212. Some tests fail.

sdk/lib/_internal/compiler/implementation/ssa/invoke_dynamic_specializers.dart

 // Copyright (c) 2013, 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;
 
 /**
  * [InvokeDynamicSpecializer] and its subclasses are helpers to
  * optimize intercepted dynamic calls. It knows what input types
  * would be beneficial for performance, and how to change a invoke
@@ skipping 370 matching lines @@
 
   HInstruction tryConvertToBuiltin(HInvokeDynamic instruction,
                                    Compiler compiler) {
     HInstruction left = instruction.inputs[1];
     HInstruction right = instruction.inputs[2];
     if (isBuiltin(instruction, compiler)) {
       if (right.isPositiveInteger(compiler) && isNotZero(right, compiler)) {
         if (left.isUInt31(compiler)) {
           return newBuiltinVariant(instruction, compiler);
         }
+        clearAllSideEffects(instruction);
         // We can call _tdivFast because the rhs is a 32bit integer
         // and not 0, nor -1.
         instruction.selector = renameToOptimizedSelector(
             '_tdivFast', instruction.selector, compiler);
       }
-      clearAllSideEffects(instruction);
     }
     return null;
   }
 
   HInstruction newBuiltinVariant(HInvokeDynamic instruction,
                                  Compiler compiler) {
     return new HTruncatingDivide(
         instruction.inputs[1], instruction.inputs[2],
         instruction.selector, computeTypeFromInputTypes(instruction, compiler));
   }
@@ skipping 317 matching lines @@
   }
 
   HInstruction newBuiltinVariant(HInvokeDynamic instruction,
                                  Compiler compiler) {
     JavaScriptBackend backend = compiler.backend;
     return new HLessEqual(
         instruction.inputs[1], instruction.inputs[2],
         instruction.selector, backend.boolType);
   }
 }