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Re: [PATCH][4/4][v2] RPO-style value-numbering for FRE/PRE
- From: Richard Biener <rguenther at suse dot de>
- To: Gerald Pfeifer <gerald at pfeifer dot com>
- Cc: gcc-patches at gcc dot gnu dot org
- Date: Wed, 5 Sep 2018 08:59:39 +0200 (CEST)
- Subject: Re: [PATCH][4/4][v2] RPO-style value-numbering for FRE/PRE
- References: <alpine.LSU.2.20.1808241317570.16707@zhemvz.fhfr.qr> <alpine.LSU.2.21.1809042357180.6216@anthias.pfeifer.com>
On Wed, 5 Sep 2018, Gerald Pfeifer wrote:
> On Fri, 24 Aug 2018, Richard Biener wrote:
> > Comments are still welcome - I've re-bootstrapped and tested the series
> > on x86_64-unknown-linux-gnu for all languages and will talk about
> > this work at the Cauldron in more detail.
>
> Is there any chance you can test this on i586 as well?
Sounds similar to PR87134? I do see successful bootstraps on i?86-linux
on gcc-testresults though.
> Since around that commit (August 27th) my i586 builds are failing
> with something like
>
> during GIMPLE pass: pre
> cp-demangle.c: In function ʽd_print_compʼ:
> cp-demangle.c:5711:1: internal compiler error: Segmentation fault
> 5711 | d_print_comp (struct d_print_info *dpi, int options,
> | ^~~~~~~~~~~~
>
> when doing a regular bootstrap on i586-unknown-freebsd10.4 (with
> clang 3.4.1 as system compiler).
>
> Alas, when I add -save-temps, the internal compiler error goes away,
> and the backtrace using gdb installed on that system I share isn't
> very useful, either. (When I replace cp-demangle.c by cp-demangle.i
> in the invocation the error also disppears.)
>
> On the other hand, this ICE has been consistent across a week of
> daily builds now.
Any help with tracking this down appreciated ...
Richard.
> Gerald
>
> /scratch/tmp/gerald/OBJ-0904-1640/./gcc/xgcc -B/scratch/tmp/gerald/OBJ-0904-1640/./gcc/ -B/home/gerald/gcc-ref10-i386/i586-unknown-freebsd10.4/bin/
> -B/home/gerald/gcc-ref10-i386/i586-unknown-freebsd10.4/lib/ -isystem
> /home/gerald/gcc-ref10-i386/i586-unknown-freebsd10.4/include -isystem
> /home/gerald/gcc-ref10-i386/i586-unknown-freebsd10.4/sys-include -fno-checking -DHAVE_CONFIG_H -I..
> -I/scratch/tmp/gerald/GCC-HEAD/libstdc++-v3/../libiberty
> -I/scratch/tmp/gerald/GCC-HEAD/libstdc++-v3/../include -D_GLIBCXX_SHARED
> -I/scratch/tmp/gerald/OBJ-0904-1640/i586-unknown-freebsd10.4/libstdc++-v3/include/i586-unknown-freebsd10.4
> -I/scratch/tmp/gerald/OBJ-0904-1640/i586-unknown-freebsd10.4/libstdc++-v3/include
> -I/scratch/tmp/gerald/GCC-HEAD/libstdc++-v3/libsupc++ -g -O2 -DIN_GLIBCPP_V3 -Wno-error
> -c cp-demangle.c -fPIC -DPIC -o cp-demangle.o
--
Richard Biener <rguenther@suse.de>
SUSE LINUX GmbH, GF: Felix Imendoerffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nuernberg)