[Bug middle-end/118608] [14/15 regression][mips64] Lack of sign extension with -Os/-O1 after r14-6915

[mateuszmar2 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118608

--- Comment #3 from Mateusz Marciniec <mateuszmar2 at gmail dot com> ---
Thanks for the patch, I applied it onto gcc 14.2.0 and tested it on our mips64
hardware, it fixed reported regression.

Additionally I ran our testsuite with patched gcc on x86_64, arm and aarch64
targets, no regressions occurred.