[Bug preprocessor/91733] No longer treat carriage return as an end-of-line

["cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91733

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Lewis Hyatt <lhyatt@gcc.gnu.org>:

https://gcc.gnu.org/g:2bd15617e73acf76207127e5580cd10b1fab91a5

commit r13-1577-g2bd15617e73acf76207127e5580cd10b1fab91a5
Author: Lewis Hyatt <lhyatt@gmail.com>
Date:   Thu Jul 7 13:59:27 2022 -0400

    diagnostics: Make line-ending logic consistent with libcpp [PR91733]

    libcpp recognizes a lone \r as a valid line ending, so the infrastructure
    for retrieving source lines to be output in diagnostics needs to do the
    same. This patch fixes file_cache_slot::get_next_line() accordingly so that
    diagnostics display the correct part of the source when \r line endings are
in
    use.

    gcc/ChangeLog:

            PR preprocessor/91733
            * input.cc (find_end_of_line): New helper function.
            (file_cache_slot::get_next_line): Recognize \r as a line ending.
            * diagnostic-show-locus.cc (test_escaping_bytes_1): Adapt selftest
            since \r will now be interpreted as a line-ending.

    gcc/testsuite/ChangeLog:

            PR preprocessor/91733
            * c-c++-common/pr91733.c: New test.