[PATCH 1/2] x86: optimize XCHG to MOV for same-register forms

[Sam James]

Jan Beulich <jbeulich@suse.com> writes:

> MOV requires far less execution resources.

In case anyone ends up stumbling upon this and wonders why Valgrind
stopped working, it needs adjusting for this change:
https://bugs.kde.org/522533.

> [...]

sam
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