[PATCH] Fix PR tree-optimization/77654

[Doug Gilmore]

> From: Christophe Lyon [christophe.lyon@linaro.org]
> Sent: Thursday, September 29, 2016 12:17 PM
> To: Matthew Fortune
> Cc: Doug Gilmore; Richard Biener; gcc-patches@gcc.gnu.org; rguenth@gcc.gnu.org
> Subject: Re: [PATCH] Fix PR tree-optimization/77654
> 
> On 23 September 2016 at 17:55, Matthew Fortune
> <Matthew.Fortune@imgtec.com> wrote:
> > Doug Gilmore <Doug.Gilmore@imgtec.com> writes:
> >> > From: Richard Biener [rguenther@suse.de]
> >> > Sent: Thursday, September 22, 2016 12:43 AM
> >> > To: Doug Gilmore
> >> > Cc: gcc-patches@gcc.gnu.org; rguenth@gcc.gnu.org
> >> > Subject: RE: [PATCH] Fix PR tree-optimization/77654
> >> >
> >> > On Wed, 21 Sep 2016, Doug Gilmore wrote:
> >> >
> >> > ...
> >> > > Sorry I that missed point.  I glossed your comment "addr_base should
> >> > > always be a pointer", causing me to go off into the weeds.
> >> > >
> >> > > New patch attached.
> >> >
> >> > Ok if successfully bootstrapped / tested.
> >> >
> >> > Thanks,
> >> > Richard.
> >> The change bootstrapped on X86_64 and the several "make check" errors
> >> also appeared in latest archived mail message to gcc-testresults.
> >
> > Committed as r240439.
> >
> 
> Since this commit, I've noticed ICE on arm target:
> FAIL: gcc.dg/params/blocksort-part.c -O3 --param prefetch-latency=0
> (internal compiler error)
> FAIL: gcc.dg/params/blocksort-part.c -O3 --param prefetch-latency=0
> (test for excess errors)
> Excess errors:
> /aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/testsuite/gcc.dg/params/blocksort-part.c:116:6:
> internal compiler error: in duplicate
> _ssa_name_ptr_info, at tree-ssanames.c:630
> ...
Hi Christophe,

I filed PR77808, will send out a fix shortly.

BTW, I missed this in regression testing since -fprefetch-loop-arrays
is needed to expose the problem.  Are you setting this as the default
in your compiler build?

Thanks,

Doug