On Fri, Oct 25, 2013 at 05:19:06PM +0200, Martin Jambor wrote:
> 2013-10-23 Martin Jambor <mjam...@suse.cz>
>
> PR rtl-optimization/10474
> * ira.c (find_moveable_pseudos): Do not calculate dominance info
> nor df analysis.
> (interesting_dest_for_shprep): New function.
> (split_live_ranges_for_shrink_wrap): Likewise.
> (ira): Calculate dominance info and df analysis. Call
> split_live_ranges_for_shrink_wrap.
>
> testsuite/
> * gcc.dg/pr10474.c: New testcase.
> * gcc.dg/ira-shrinkwrap-prep-1.c: Likewise.
> * gcc.dg/ira-shrinkwrap-prep-2.c: Likewise.
Unfortunately this patch breaks i686-linux bootstrap,
in r204204 compare passes, while in r204205 I'm getting .bad_compare
gcc/fortran/module.o differs
gcc/ipa.o differs
gcc/go/gogo.o differs
gcc/go/statements.o differs
Most likely combine.o is miscompiled, but haven't verified that yet.
The way I'm configuring this on x86_64-linux is:
mkdir ~/hbin
cat > ~/hbin/as <<\EOF2
#!/bin/sh
exec /usr/bin/as --32 "$@"
EOF2
cat > ~/hbin/g++ <<\EOF2
#!/bin/sh
exec /usr/bin/g++ -m32 "$@"
EOF2
cat > ~/hbin/gcc <<\EOF2
#!/bin/sh
exec /usr/bin/gcc -m32 "$@"
EOF2
cat > ~/hbin/ld <<\EOF2
#!/bin/sh
case "$*" in
--version) cat <<\EOF
GNU ld version 2.20.52.0.1-10.fc17 20100131
Copyright 2012 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) a later
version.
This program has absolutely no warranty.
EOF
exit 0;;
esac
exec /usr/bin/ld -m elf_i386 -L /usr/lib/ "$@"
EOF2
chmod 755 ~/hbin/*
PATH=~/hbin:$PATH i386 ../configure --enable-languages=all,obj-c++,lto,go
--enable-checking=yes,rtl
PATH=~/hbin:$PATH i386 make -j48
Jakub
