[Bug tree-optimization/92765] [10 Regression] wrong code for strcmp of a union member

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92765

--- Comment #25 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Martin Sebor <msebor@gcc.gnu.org>:

https://gcc.gnu.org/g:e7868dc6a79daec4f46552fa5c99f88e4eb8de4c

commit r10-6465-ge7868dc6a79daec4f46552fa5c99f88e4eb8de4c
Author: Martin Sebor <msebor@redhat.com>
Date:   Wed Feb 5 16:55:26 2020 -0700

    PR tree-optimization/92765 - wrong code for strcmp of a union member

    gcc/ChangeLog:

        PR tree-optimization/92765
        * gimple-fold.c (get_range_strlen_tree): Handle MEM_REF and PARM_DECL.
        * tree-ssa-strlen.c (compute_string_length): Remove.
        (determine_min_objsize): Remove.
        (get_len_or_size): Add an argument.  Call get_range_strlen_dynamic.
        Avoid using type size as the upper bound on string length.
        (handle_builtin_string_cmp): Add an argument.  Adjust.
        (strlen_check_and_optimize_call): Pass additional argument to
        handle_builtin_string_cmp.

    gcc/testsuite/ChangeLog:

        PR tree-optimization/92765
        * g++.dg/tree-ssa/strlenopt-1.C: New test.
        * g++.dg/tree-ssa/strlenopt-2.C: New test.
        * gcc.dg/Warray-bounds-58.c: New test.
        * gcc.dg/Wrestrict-20.c: Avoid a valid -Wformat-overflow.
        * gcc.dg/Wstring-compare.c: Xfail a test.
        * gcc.dg/strcmpopt_2.c: Disable tests.
        * gcc.dg/strcmpopt_4.c: Adjust tests.
        * gcc.dg/strcmpopt_10.c: New test.
        * gcc.dg/strcmpopt_11.c: New test.
        * gcc.dg/strlenopt-69.c: Disable tests.
        * gcc.dg/strlenopt-92.c: New test.
        * gcc.dg/strlenopt-93.c: New test.
        * gcc.dg/strlenopt.h: Declare calloc.
        * gcc.dg/tree-ssa/pr92056.c: Xfail tests until pr93518 is resolved.
        * gcc.dg/tree-ssa/builtin-sprintf-warn-23.c: Correct test (pr93517).