Severe problems with vectorizing stuff in 4.0.3 HEAD

[Andrew Pinski]

On Oct 14, 2005, at 3:55 PM, Andrew Pinski wrote:

>
> On Oct 14, 2005, at 3:43 PM, Kean Johnston wrote:
>
>> What does the fact that -fno-optimize-sibling-calls worked
>> indicate really? Without that option something really does
>> seem to be mis-calculating the stack offsets by 4. What may
>> be of interest here is that aside from the vect/* tests,
>> the only other test that is failing is sibcall-6.
>
> It indicated that sibling calling optimization in main should
> be disabled for targets that need to up the stack alignment,
> otherwise you get the stack alignment of a lower one than
> that is required.  You have to look to see what changed
> between 3.4.0 and 4.0.0 that caused this since it is a
> regression.  I think the issue is that we are detecting them
> at the tree level but not rejecting them when expanding.  So you
> have to look at the expand functions for that.

Note I filed PR 24374 for this problem since it is a regression
from 3.4.0.

Thanks,
Andrew Pinski