[Bug rtl-optimization/84635] gcc/regrename.c:1706:64: runtime error: index -1 out of bounds for type 'machine_mode [30]'

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84635

--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Sun Mar 18 20:17:10 2018
New Revision: 258634

URL: https://gcc.gnu.org/viewcvs?rev=258634&root=gcc&view=rev
Log:
Fix UBSAN in regrename.c (PR rtl-optimization/84635).

2018-03-18  Martin Liska  <mliska@suse.cz>

        PR rtl-optimization/84635
        * regrename.c (build_def_use): Use matches_mode only when
        matches >= 0.

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