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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/102566] [i386] GCC should emit LOCK BTS for simple
 bit-test-and-set operations with std::atomic
Date: Wed, 06 Oct 2021 15:47:07 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102566

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #51558|0                           |1
        is obsolete|                            |

--- Comment #21 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 51559
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D51559&action=3Dedit
The new v3 patch

The new v3 patch to check invalid mask.=