[PATCH][GCC] Simplification of 1U << (31 - x)
Jakub Jelinek
jakub@redhat.com
Tue Sep 26 13:06:00 GMT 2017
On Tue, Sep 26, 2017 at 12:44:10PM +0000, Sudi Das wrote:
>
> Still waiting on Jakub's comment on whether there are more things needed
> at the backend. But I have updated the patch according to Richard's
> comments.
Well, we don't want to regress performance wise on one of the most important
primary targets. I don't care that much if the RTL/backend work is done
together with the patch, or as a follow-up during stage1/3, but it should be
done, the testcases I've posted can be used as a basis of a P1 runtime
performance regression.
Jakub
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