[Bug rtl-optimization/82044] runtime signed integer overflow in check_mem_read_rtx() and all_positions_needed_p() in dse.c

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82044

--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue Nov 21 13:39:14 2017
New Revision: 255001

URL: https://gcc.gnu.org/viewcvs?rev=255001&root=gcc&view=rev
Log:
Fix UBSAN errors in dse.c (PR rtl-optimization/82044).

2017-11-21  Martin Liska  <mliska@suse.cz>

        PR rtl-optimization/82044
        PR tree-optimization/82042
        * dse.c (check_mem_read_rtx): Check for overflow.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/dse.c