[Bug rtl-optimization/91656] [10 Regression] wrong code with -fgcse-after-reload

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91656

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Sep  5 13:23:28 2019
New Revision: 275406

URL: https://gcc.gnu.org/viewcvs?rev=275406&root=gcc&view=rev
Log:
2019-09-05  Richard Biener  <rguenther@suse.de>

        PR rtl-optimization/91656
        * postreload-gcse.c (record_last_mem_set_info): Revert addition
        of early out.

        * gcc.dg/torture/pr91656-1.c: New testcase.
        * gcc.dg/torture/pr91656-2.c: Likewise.
        * gcc.dg/torture/pr91656-3.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr91656-1.c
    trunk/gcc/testsuite/gcc.dg/torture/pr91656-2.c
    trunk/gcc/testsuite/gcc.dg/torture/pr91656-3.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/postreload-gcse.c
    trunk/gcc/testsuite/ChangeLog