Strange bootstrap failure in

[David Ronis <ronis at montroll dot chem dot mcgill dot ca>]

I tried an optimized bootstrap build of gcc version 2.96 20000321
(experimental) on an i686-linux(2.2.14)-gnu(2.1.3) box with
BOOT_CFLAGS

      -O3 -march=pentiumpro -funroll-loops -fomit-frame-pointer
 -fstrict-aliasing -fforce-mem -fforce-addr -ffast-math -malign-double

The last few lines of the log read (with lines broken by me):

stage1/xgcc -Bstage1/ -B/usr/local/i686-pc-linux-gnu/bin/ -c -DIN_GCC
	    -W -Wall -Wtraditional -O2 -O3 -march=pentiumpro -funroll-loops
	    -fomit-frame-pointer -fstrict-aliasing -fforce-mem -fforce-addr
	    -ffast-math -malign-double -DHAVE_CONFIG_H -I. -I../../egcs/gcc
	    -I../../egcs/gcc/config -I../../egcs/gcc/../include
	    ../../egcs/gcc/gccspec.c

stage1/xgcc -Bstage1/ -B/usr/local/i686-pc-linux-gnu/bin/ -DIN_GCC -W
  -Wall -Wtraditional -O2 -O3 -march=pentiumpro -funroll-loops
  -fomit-frame-pointer -fstrict-aliasing -fforce-mem -fforce-addr
  -ffast-math -malign-double -DHAVE_CONFIG_H -o xgcc gcc.o gccspec.o
  intl.o prefix.o version.o obstack.o ../libiberty/libiberty.a

echo "int xxy_us_dummy;" >tmp-dum.c

./xgcc -B/usr/local/i686-pc-linux-gnu/bin/ -B.
       -I/usr/local/i686-pc-linux-gnu/include -S tmp-dum.c

make[2]: *** [s-under] Segmentation fault
make[2]: Leaving directory `/home/ronis/Project/notar/objdir/gcc'
make[1]: *** [bootstrap] Error 2
make[1]: Leaving directory `/home/ronis/Project/notar/objdir/gcc'
make: *** [bootstrap] Error 2

The problem is that ./xgcc SIGSEGV's (when run with no arguments or
with -v) and thus I've not been able to run with -save-temps.  This
problem was also present in the preceding snapshot (and was reported).

David

P.S., there are several nasty bugs that crop up with high levels of
optimization (notably in g++) and are already present in 2.95.2 and
lead to massive g++ testfailures.  [I've reported the ones I've come
across, albeit without any ideas how to fix them].