[Bug rtl-optimization/58668] [4.8/4.9 regression] internal compiler error: in cond_exec_process_insns, at ifcvt.c:339

["jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58668

--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Jan  7 16:51:16 2014
New Revision: 206398

URL: http://gcc.gnu.org/viewcvs?rev=206398&root=gcc&view=rev
Log:
    PR rtl-optimization/58668
    * cfgcleanup.c (flow_find_cross_jump): Don't count
    any jumps if dir_p is NULL.  Remove p1 variable and make USE/CLOBBER
    check consistent with other places.
    (flow_find_head_matching_sequence): Don't count USE or CLOBBER insns.
    (try_head_merge_bb): Adjust for the flow_find_head_matching_sequence
    counting change.
    * ifcvt.c (count_bb_insns): Don't count USE or CLOBBER insns.

    * gcc.dg/pr58668.c: New test.

Added:
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/pr58668.c
Modified:
    branches/gcc-4_8-branch/gcc/ChangeLog
    branches/gcc-4_8-branch/gcc/cfgcleanup.c
    branches/gcc-4_8-branch/gcc/ifcvt.c
    branches/gcc-4_8-branch/gcc/testsuite/ChangeLog