Fix performance regression after adding inlining support for operators, [], and []=.

sdk/lib/_internal/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.
 
 part of ssa;
 
 class BailoutInfo {
   int instructionId;
   int bailoutId;
   BailoutInfo(this.instructionId, this.bailoutId);
@@ skipping 197 matching lines @@
       }
     }
 
     // Insert type guards if the method is likely to be called in a
     // loop.
     return calledInLoop;
   }
 
   // Returns whether an invocation of [selector] on [receiver] will throw a
   // [ArgumentError] if the argument is not of the right type.
-  bool willThrowArgumentError(Selector selector, HInstruction receiver) {
+  bool willThrowArgumentError(Selector selector,
+                              HInstruction receiver,
+                              HType speculativeType) {
     if (receiver != null && (receiver.isInteger() || receiver.isString())) {
-      return selector.isOperator() && selector.name != const SourceString('==');
+      return selector.isOperator()
+          && selector.name != const SourceString('==')
+          && (speculativeType.isNumber() && !speculativeType.isInteger());
     }
     return false;
   }
 
   // Returns whether an invocation of [selector] will throw a
   // [NoSuchMethodError] if the receiver is not of the type
   // [speculativeType].
   bool willThrowNoSuchMethodErrorIfNot(Selector selector,
                                        HType speculativeType) {
     return compiler.world.hasSingleMatch(selector)
@@ skipping 52 matching lines @@
     // will throw [NoSuchMethodError] or [ArgumentError].
     Selector selector = firstUser.selector;
     Selector receiverSelectorOnThrow = null;
     HInstruction receiver = firstUser.getDartReceiver(compiler);
     bool willThrow = false;
     if (receiver == instruction) {
       if (willThrowNoSuchMethodErrorIfNot(selector, speculativeType)) {
         receiverSelectorOnThrow = selector;
         willThrow = true;
       }
-    } else if (willThrowArgumentError(selector, receiver)) {
+    } else if (willThrowArgumentError(selector, receiver, speculativeType)) {
       willThrow = true;
     }
 
     if (!willThrow) return false;
 
     HTypeConversion check = new HTypeConversion(
             null,
             receiverSelectorOnThrow == null
                 ? HTypeConversion.ARGUMENT_TYPE_CHECK
                 : HTypeConversion.RECEIVER_TYPE_CHECK,
@@ skipping 428 matching lines @@
         hasComplexBailoutTargets = true;
       }
     } else {
       hasComplexBailoutTargets = true;
       blocks.forEach((HBasicBlock block) {
         block.bailoutTargets.add(target);
       });
     }
   }
 }