[Bug tree-optimization/92226] [10 Regression] live nul char store to array eliminated

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92226

--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Mon Oct 28 23:46:09 2019
New Revision: 277545

URL: https://gcc.gnu.org/viewcvs?rev=277545&root=gcc&view=rev
Log:
PR tree-optimization/92226 - live nul char store to array eliminated

gcc/testsuite/ChangeLog:

        PR tree-optimization/92226
        * gcc.dg/strlenopt-88.c: New test.

gcc/ChangeLog:

        PR tree-optimization/92226
        * tree-ssa-strlen.c (compare_nonzero_chars): Return -1 also when
        the offset is in the open range outlined by SI's length.


Added:
    trunk/gcc/testsuite/gcc.dg/strlenopt-88.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-strlen.c