[Bug rtl-optimization/89435] [7/8/9 Regression] wrong code with -O1 -march=armv4 -fno-forward-propagate with __builtin_sub_overflow()

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89435

--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Oct 21 11:42:37 2019
New Revision: 277251

URL: https://gcc.gnu.org/viewcvs?rev=277251&root=gcc&view=rev
Log:
        Backported from mainline
        2019-09-11  Jakub Jelinek  <jakub@redhat.com>

        PR rtl-optimization/89435
        PR rtl-optimization/89795
        PR rtl-optimization/91720
        * gcc.dg/pr89435.c: New test.
        * gcc.dg/pr89795.c: New test.
        * gcc.dg/pr91720.c: New test.

Added:
    branches/gcc-9-branch/gcc/testsuite/gcc.dg/pr89435.c
    branches/gcc-9-branch/gcc/testsuite/gcc.dg/pr89795.c
    branches/gcc-9-branch/gcc/testsuite/gcc.dg/pr91720.c
Modified:
    branches/gcc-9-branch/gcc/testsuite/ChangeLog