[Bug tree-optimization/104582] Unoptimal code for __negdi2 (and others) from libgcc2

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104582

--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
Please note that gcc-10 does not vectorize the testcase even with -O3
-ftree-vectorize.