https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126582
--- Comment #1 from Oleg Endo <olegendo at gcc dot gnu.org> --- SH doesn't support 64-bit atomic operations, only 32-bit.
olegendo at gcc dot gnu.org via Gcc-bugs Sat, 01 Aug 2026 21:32:19 -0700
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126582
--- Comment #1 from Oleg Endo <olegendo at gcc dot gnu.org> --- SH doesn't support 64-bit atomic operations, only 32-bit.