[11] RFR: 8198252: Null pointer dereference in fold_compares_helper

[Rahul Raghavan]

Hi,

Please review the following fix proposal.

<webrev> - http://cr.openjdk.java.net/~rraghavan/8198252/webrev.01/

<JBS> - https://bugs.openjdk.java.net/browse/JDK-8198252 -
   'Null pointer dereference in IfNode::fold_compares_helper'

-- Reported issue is - filtered_int_type() may return NULL and
in IfNode::fold_compares_helper(), results of filtered_int_type() call - 
lo_type, hi_type - are dereferenced without null checks.

-- Proposed fix above is adding NULL check for required if conditions 
checks.

-- Confirmed for other locations of calls to filtered_int_type(), the 
possible NULL result is handled.


Thanks,
Rahul