[Bug target/110235] [14 Regression] Wrong use of us_truncate in SSE and AVX RTL representation

[crazylht at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110235

--- Comment #2 from Hongtao.liu <crazylht at gmail dot com> ---
FAIL: gcc.target/i386/avx2-vpackssdw-2.c execution test

This one is about sign saturation which should match rtl SS_TRUNCATE.