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

Jan Beulich via Valgrind-developers <valgrind-developers-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
Newsgroups gmane.comp.debugging.valgrind.devel,gmane.comp.gnu.binutils
Message-ID <[email protected]> 
On 06.07.2026 23:12, H.J. Lu wrote:
> We should consider benefits vs drawbacks for this optimization.  Do we have
> a list of applications which benefit from this optimization?

This question was raised before (in different words), and the answer is still
the same - how could we possibly know? The same is true though for about any
other of the optimizations we meanwhile have. IOW to me that's _still_ not a
viable criteria to work from.

Jan
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