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Re: [PATCH] Fix PR68067
- From: Richard Biener <rguenther at suse dot de>
- To: Alan Lawrence <alan dot lawrence at arm dot com>
- Cc: "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
- Date: Fri, 6 Nov 2015 13:26:09 +0100 (CET)
- Subject: Re: [PATCH] Fix PR68067
- Authentication-results: sourceware.org; auth=none
- References: <alpine dot LSU dot 2 dot 11 dot 1510271340060 dot 28064 at zhemvz dot fhfr dot qr> <alpine dot LSU dot 2 dot 11 dot 1510271526510 dot 28064 at zhemvz dot fhfr dot qr> <alpine dot LSU dot 2 dot 11 dot 1510281437450 dot 28064 at zhemvz dot fhfr dot qr> <563C817D dot 1060107 at arm dot com> <alpine dot LSU dot 2 dot 11 dot 1511061136580 dot 10078 at zhemvz dot fhfr dot qr> <563C9BDA dot 9080002 at arm dot com>
On Fri, 6 Nov 2015, Alan Lawrence wrote:
> On 06/11/15 10:39, Richard Biener wrote:
> > > ../spec2000/benchspec/CINT2000/254.gap/src/polynom.c:358:11: error:
> > > location
> > > references block not in block tree
> > > l1_279 = PHI <1(28), l1_299(33)>
> >
> > ^^^
> >
> > this is the error to look at! It means that the GC heap will be corrupted
> > quite easily.
>
> Thanks, I'll have a go at that.
>
> -fdump-tree-alias is also suspicious, hinting that that does more than just
> print. (How many bugs here??)
Well, it only allocates some more heap memory for extra debug verbosity.
I think this can happen with other dumps as well.
> > Interesting would be for which pass this happens - just print
> > *pass at this point.
>
> FWIW - unswitch. (A long time after -fdump-tree-alias!)
Ah, unswitch again... :/
> Cheers, Alan
>
>
--
Richard Biener <rguenther@suse.de>
SUSE LINUX GmbH, GF: Felix Imendoerffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nuernberg)