[Bug lto/83201] [7/8 Regression] SPEC CPU2017 505.mcf_r produces incorrect output when built with -flto and FDO

[rguenther at suse dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83201

--- Comment #19 from rguenther at suse dot de <rguenther at suse dot de> ---
On December 19, 2017 5:42:07 PM GMT+01:00, "pthaugen at gcc dot gnu.org"
<gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83201
>
>--- Comment #18 from Pat Haugen <pthaugen at gcc dot gnu.org> ---
>(In reply to Martin Liška from comment #16)
>> (In reply to Richard Biener from comment #15)
>> > SWAPINIT should end up with swaptype_long == 1 I think and
>swaptype_int == 1
>> > for the cases in question.  Enforcing swaptype_int = swaptype_long
>= 2
>> > should make it work (scratch SWAPINIT calls).
>> 
>> I can confirm that.
>
>Yes, that fixes the problem for me on PowerPC also. I can pass along
>the info
>to our SPEC rep.
>
>
>Richi,
>I'm curious if the alias violations were apparent in a dump file, or
>did you
>just happened to spot them looking through the source?

I just looked at the source seeing *(long *) ptr and bells went off. 

Richard.