[Bug target/122018] x86 doesn't use BTS bitmanip instruction to both set and test bit

[uis9936 at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122018

--- Comment #2 from uis <uis9936 at gmail dot com> ---
Created attachment 62426
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=62426&action=edit
Extended asm generating expected output