[Bug tree-optimization/92501] strncmp with constant unterminated arrays not folded

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92501

--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Nov 22 16:39:37 2019
New Revision: 278621

URL: https://gcc.gnu.org/viewcvs?rev=278621&root=gcc&view=rev
Log:
PR tree-optimization/92501 - strncmp with constant unterminated arrays not
folded

gcc/testsuite/ChangeLog:

        PR tree-optimization/92501
        * gcc.dg/strcmpopt_7.c: New test.

gcc/ChangeLog:

        PR tree-optimization/92501
        * gimple-fold.c ((gimple_fold_builtin_string_compare): Let strncmp
        handle unterminated arrays.  Rename local variables for clarity.


Added:
    trunk/gcc/testsuite/gcc.dg/strcmpopt_7.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-fold.c
    trunk/gcc/testsuite/ChangeLog