[Bug middle-end/102566] [i386] GCC should emit LOCK BTS for simple bit-test-and-set operations with std::atomic

[hjl.tools at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102566

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
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  Attachment #51549|0                           |1
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--- Comment #13 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 51551
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51551&action=edit
The v4 patch

Please try the v4 patch.