https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98782

--- Comment #33 from pthaugen at gcc dot gnu.org ---
(In reply to rsand...@gcc.gnu.org from comment #32)
> Created attachment 52102 [details]
> Alternative patch
> 
> This patch is a squash of several ira tweaks that together recover the
> pre-GCC11 exchange2 performance on aarch64.  It isn't ready for trunk
> yet (hence lack of comments and changelog).  It would be great to hear
> whether/how it works on other targets though.

I tried the patch on a Power9 system. Execution time went from 371 seconds to
291.

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