[Bug regression/32582] Bootstrap with vectorization enabled fails with ICE on PPC

[rakdver at kam dot mff dot cuni dot cz]

------- Comment #29 from rakdver at kam dot mff dot cuni dot cz  2007-08-13 18:04 -------
Subject: Re:  Bootstrap with vectorization enabled fails with ICE on PPC

> ------- Comment #27 from victork at il dot ibm dot com  2007-08-13 15:09 -------
> > this is the problem we discussed in this thread before; for now, add
> > -mabi=altivec to BOOT_CFLAGS to workaround it.
> 
> yes, this helped. Still I see a failure in cofigure before stage3 starts:
> checking for powerpc-suse-linux-gcc... 
> /home/victork/mainline/build.trunk.127373/./prev-gcc/xgcc
> -B/home/victork/mainline/build.trunk.127373/./prev-gcc/
> -B/home/victork/mainline/usr.trunk.127373/powerpc-suse-linux/bin/
> checking for C compiler default output file name... a.out
> checking whether the C compiler works... configure: error: cannot run C
> compiled programs.
> If you meant to cross compile, use `--host'.
> See `config.log' for more details.
> 
> Seemingly, the compiler created by stage 2 is unusable.

this is a misscompilation of crtbegin.o that I have been investigating
as well.  The reason seems to be that with -ftree-vectorize, we
change alignment of __CTOR_LIST__ and __DTOR_LIST__, although why
exactly this causes problems I did not find out yet.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32582