[PATCH] reload: Try alternative with swapped operands before going to the next

Eric Botcazou ebotcazou@adacore.com
Thu Nov 17 19:33:00 GMT 2011


> I understand your concern and the patch indeed will have an impact on the
> generated code of probably several back-ends. But with entering stage 3 the
> backend maintainers anyway are supposed to have a closer look at
> regressions.

Yes, that's why risking to introduce more of them isn't the best thing to do at 
this stage.  IMO this is too late in the 4.7 cycle.

> In my opinion the patch makes reload behave more like everybody expects it to
> behave and at least for s390 I can say that we have several patterns which
> have been written with that expectation. With the patch GCC generates better
> code for S/390 so I would like to see this patch applied. 

That isn't compelling enough I think, given the timing.

-- 
Eric Botcazou



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