[Bug tree-optimization/94125] [9/10 Regression] wrong code at -O3 on x86_64-linux-gnu

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94125

--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Bin Cheng <amker@gcc.gnu.org>:

https://gcc.gnu.org/g:e4e9a59105a81cdd6c1328b0a5ed9fe4cc82840e

commit r10-7184-ge4e9a59105a81cdd6c1328b0a5ed9fe4cc82840e
Author: Bin Cheng <bin.cheng@linux.alibaba.com>
Date:   Mon Mar 16 11:09:14 2020 +0800

    Update post order number for merged SCC.

    Function loop_distribution::break_alias_scc_partitions needs to compute
    SCC with runtime alias edges skipped.  As a result, partitions could be
    re-assigned larger post order number than SCC's precedent partition and
    distributed before the precedent one.  This fixes the issue by updating
    the merged partition to the minimal post order in SCC.

    gcc/
        PR tree-optimization/94125
        * tree-loop-distribution.c
        (loop_distribution::break_alias_scc_partitions): Update post order
        number for merged scc.

    gcc/testsuite/
        PR tree-optimization/94125
        * gcc.dg/tree-ssa/pr94125.c: New test.