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Subject: [Bug bootstrap/55388] [4.8 regression] ICE in int_mode_for_mode at stor-layout.c:423 breaks sparc64-linux bootstrap
Date: Wed, 21 Nov 2012 23:29:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55388

--- Comment #7 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> 2012-11-21 23:28:47 UTC ---
(In reply to comment #5)
> Created attachment 28757 [details]
> preprocessed libstdc++-v3/libsupc++/dyncast.cc
> 
> Full configuration options:
> /mnt/scratch/gcc-4.8-r193687/configure --prefix=/mnt/scratch/install48
> --with-gmp=/home/mikpe/pkgs/linux-sparc64/gmp-5.0.5
> --with-mpfr=/home/mikpe/pkgs/linux-sparc64/mpfr-3.1.1
> --with-mpc=/home/mikpe/pkgs/linux-sparc64/mpc-1.0.1 --enable-multilib
> --disable-plugin --disable-lto --disable-nls --enable-threads=posix
> --enable-checking=release --disable-libmudflap --enable-languages=c,c++
> --build=sparc-unknown-linux --target=sparc-unknown-linux --with-cpu=ultrasparc
> --enable-targets=all --disable-libsanitizer

Thanks.  After trying and failing to convince it to fail in cross environment,
it finally dawned on me that the failure was during stage 2, so presumably
this is a miscompile of cc1plus.  Sorry for the runaround.

I'll try to reproduce the failure on gcc62, but I'm guessing it will take
a while to reach the failure point.