[Bug debug/54177] [4.8 Regression]: Segfault in cselib_lookup due to NULL_RTX passed from vt_add_function_parameter

[aoliva at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54177

--- Comment #6 from Alexandre Oliva <aoliva at gcc dot gnu.org> 2012-10-02 19:58:41 UTC ---
Author: aoliva
Date: Tue Oct  2 19:58:37 2012
New Revision: 191999

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=191999
Log:
PR debug/54177
* var-tracking.c (vt_add_function_parameter): Bail if
var_lowpart fails.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/var-tracking.c