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Re: [4.0 PATCH] Disable Tree-SRA for the Ada compiler


    But, as far as I can tell, it will introduce a brand new class of bugs
    too, at the interfaces between types and subtypes.  See PR ada/18819.

More details on your comment #5 will help a lot!  Indeed that bug was one
of the next ones I was going to investigate.

SRA is a pretty straightforward pass (and one of the few tree passes I
understand well), so it shouldn't be hard to fix whatever is going wrong.

    On the 4.0 branch, sure.  But since it will not be disabled on
    mainline, I don't really see the problem.

I do.  I'd rather fix the bugs.  So far I haven't seen any evidence presented
at all that there's a large class of bugs here.  I'd certainly be willing
to change my mind if such evidence were presented.


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