[Bug target/64554] _mm_clmulepi64_si128 doesn't compile with -O2

[charles at kde dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64554

--- Comment #3 from charles at kde dot org ---
with "gcc test.c -O2" it fails
with "gcc test.c -O2 -mpclmul" it succeeds.