[Bug tree-optimization/86204] [9 Regression] wrong strlen result after prior strnlen

Mon, 25 Jun 2018 13:48:01 -0700 

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86204

--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Mon Jun 25 20:46:45 2018
New Revision: 262114

URL: https://gcc.gnu.org/viewcvs?rev=262114&root=gcc&view=rev
Log:
PR tree-optimization/86204 -  wrong strlen result after prior strnlen

gcc/ChangeLog:

        PR tree-optimization/86204
        * tree-ssa-strlen.c (handle_builtin_strlen): Avoid storing
        a strnlen result if it's less than the length of the string.

gcc/testsuite/ChangeLog:

        PR tree-optimization/86204
        * gcc.dg/strlenopt-46.c: New test.


Added:
    trunk/gcc/testsuite/gcc.dg/strlenopt-46.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-strlen.c

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