[Bug tree-optimization/86083] handle non-constant assignments in strlen

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86083

--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Mon Jun 11 20:01:40 2018
New Revision: 261452

URL: https://gcc.gnu.org/viewcvs?rev=261452&root=gcc&view=rev
Log:
PR tree-optimization/86083 - handle non-constant assignments in strlen

gcc/ChangeLog:

        PR tree-optimization/86083
        * tree-ssa-strlen.c (handle_char_store): Use tree_expr_nonzero_p.

gcc/testsuite/ChangeLog:

        PR tree-optimization/86083
        * gcc.dg/strlenopt-44.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/strlenopt-44.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-strlen.c