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

uis9936 at gmail dot com via Gcc-bugs <[email protected]> Wed, 05 Aug 2026 00:43:39 +0000

Newsgroups	gmane.comp.gcc.bugs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122018

--- Comment #14 from uis <uis9936 at gmail dot com> ---
Created attachment 65242
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65242&action=edit
[DRAFT] i368: merge bt into bts

Seems to work on test file. Currently it ignores btr and looks very hacky. I
don't know if "ix86_pre_reload_split ()" needs be there or not. Probably not.
I did not run full bootstrap or testsuite.

Is this solving it in this way a good idea?