[Bug tree-optimization/95638] [10 Regression] Legit-looking code doesn't work with -O2

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95638

--- Comment #12 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-9 branch has been updated by Bin Cheng <amker@gcc.gnu.org>:

https://gcc.gnu.org/g:dc7a8afce35eb8948b481b5bcb8d26124a267f55

commit r9-8730-gdc7a8afce35eb8948b481b5bcb8d26124a267f55
Author: Bin Cheng <bin.cheng@linux.alibaba.com>
Date:   Sat Jun 20 15:42:12 2020 +0800

    Record and restore postorder information in breaking alias sccs.

    gcc/
            PR tree-optimization/95638
            * tree-loop-distribution.c (pg_edge_callback_data): New field.
            (loop_distribution::break_alias_scc_partitions): Record and restore
            postorder information.  Fix memory leak.

    gcc/testsuite/
            PR tree-optimization/95638
            * g++.dg/tree-ssa/pr95638.C: New test.

    (cherry picked from commit 2c0069fafb53ccb7a45a6815025dfcbd2882a36e)