[Bug rtl-optimization/90026] [8/9 Regression] ICE: verify_flow_info failed (error: missing barrier after block 2)

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90026

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr 12 07:27:25 2019
New Revision: 270304

URL: https://gcc.gnu.org/viewcvs?rev=270304&root=gcc&view=rev
Log:
        PR rtl-optimization/90026
        * cfgcleanup.c (try_optimize_cfg): When removing empty bb with no
        successors, look for BARRIERs inside of the whole BB_FOOTER chain
        rather than just at the start of it.  If e->src BB_FOOTER is not NULL
        in cfglayout mode, use emit_barrier_after_bb.

        * g++.dg/opt/pr90026.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/opt/pr90026.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfgcleanup.c
    trunk/gcc/testsuite/ChangeLog