[Bug rtl-optimization/83575] [8 Regression] ICE: verify_flow_info failed (error: multiple hot/cold transitions found)

[hubicka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83575

--- Comment #10 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Thu Jan 11 08:02:26 2018
New Revision: 256479

URL: https://gcc.gnu.org/viewcvs?rev=256479&root=gcc&view=rev
Log:
        PR middle-end/83575
        * cfgrtl.c (rtl_verify_edges): Only verify fixability of partition
        when in layout mode.
        (cfg_layout_finalize): Do not verify cfg before we are out of layout.
        * cfgcleanup.c (try_optimize_cfg): Only verify flow info when doing
        partition fixup.

        * gcc.c-torture/compile/pr83575.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr83575.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfgcleanup.c
    trunk/gcc/cfgrtl.c
    trunk/gcc/testsuite/ChangeLog