3.1 bootstrap fails on irix6.5

[Billinghurst, David (CRTS)]

3.1 bootstrap on irix 6.5 fails.  This is cvs from Sun Apr 14 12:23:45 2002 UTC
Last successful bootstrap was Fri Apr 12 03:24:54 2002

Error is

./xgcc -B./ -B/exd6/billingd/tmp/gcc-3.1/mips-sgi-irix6.5/bin/ -isystem /exd6/billingd/tmp/gcc-3.1/mips-sgi-irix6.5/include -isystem /exd6/billingd/tmp/gcc-3.1/mips-sgi-irix6.5/sys-include -O2  -DIN_GCC    -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -isystem ./include   -g  -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED  -I. -I. -I/exd2/billingd/src/gcc-3.1/gcc -I/exd2/billingd/src/gcc-3.1/gcc/. -I/exd2/billingd/src/gcc-3.1/gcc/config -I/exd2/billingd/src/gcc-3.1/gcc/../include -mabi=64 -fexceptions -c /exd2/billingd/src/gcc-3.1/gcc/unwind-dw2.c -o libgcc/mabi=64/unwind-dw2.o
/exd2/billingd/src/gcc-3.1/gcc/unwind-dw2.c: In function `execute_cfa_program':
/exd2/billingd/src/gcc-3.1/gcc/unwind-dw2.c:890: internal error: Illegal instruction