[Bug rtl-optimization/81290] [8 Regression] ICE in update_br_prob_note

[hubicka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81290

--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Mon Jul  3 14:40:46 2017
New Revision: 249924

URL: https://gcc.gnu.org/viewcvs?rev=249924&root=gcc&view=rev
Log:

        PR middle-end/81290
        * predict.c (force_edge_cold): Be more careful about propagation
        backward.
        * profile-count.h (profile_probability::guessed,
        profile_probability::fdo, profile_count::guessed, profile_count::fdo):
        New.
        * tree-ssa-threadupdate.c (recompute_probabilities): Result is guessed.

        * gcc.c-torture/compile/pr81290.c: New.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr81290.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/predict.c
    trunk/gcc/profile-count.h
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-threadupdate.c