[turbofan] Work-around untagged result of CompareIC in pointer maps.

test/mjsunit/compiler/regress-469089.js

Index: test/mjsunit/compiler/regress-469089.js
diff --git a/test/mjsunit/regress/regress-crbug-455644.js b/test/mjsunit/compiler/regress-469089.js
similarity index 52%
copy from test/mjsunit/regress/regress-crbug-455644.js
copy to test/mjsunit/compiler/regress-469089.js
index 4993d857a89f620df2b0d1f9813a2a382a77bd8d..6aff2b720305290570124cec0dd7a4a959f05694 100644
--- a/test/mjsunit/regress/regress-crbug-455644.js
+++ b/test/mjsunit/compiler/regress-469089.js
@@ -2,11 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-(function f() {
-  do { return 23; } while(false);
-  with (0) {
-    try {
-      return 42;
-    } finally {}
+// Flags: --expose-gc
+
+(function() {
+  var __v_6 = false;
+  function f(val, idx) {
+    if (idx === 1) {
+      gc();
+      __v_6 = (val === 0);
+    }
   }
+  f(.1, 1);
 })();