[Bug preprocessor/118168] -Wmisleading-indentation causes 10x+ overhead or higher (visible on mypy-1.13.0)

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118168

--- Comment #12 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Andi Kleen <a...@gcc.gnu.org>:

https://gcc.gnu.org/g:e2f024f586e99fb63dd49e0603f52d1cb765a77e

commit r15-7211-ge2f024f586e99fb63dd49e0603f52d1cb765a77e
Author: Andi Kleen <a...@gcc.gnu.org>
Date:   Wed Dec 25 20:21:58 2024 -0800

    Move ferror out of hot loop of file cache

    glibc ferror is surprisingly expensive. Move it out of the hot loop
    of finding lines by setting a flag after the actual IO operations.

    gcc/ChangeLog:

            PR preprocessor/118168
            * input.cc (file_cache_slot::m_error): New field.
            (file_cache_slot::create): Clear m_error.
            (file_cache_slot::file_cache_slot): Clear m_error.
            (file_cache_slot::read_data): Set m_error on error.
            (file_cache_slot::get_next_line): Use m_error instead of ferror.