Make bootstrap for gcc-2.95.2 fails at stage3 for VAX Ultrix 4.3

[John David Anglin]

The following ICE occurs at the start of stage3:

stage2/xgcc -Bstage2/ -B/usr/local/vax-dec-ultrix4.3/bin/  -DIN_GCC     -O2 -g -O3 -W -Wall  -DHAVE_CONFIG_H    -I. -I../../gcc -I../../gcc/config -I../../gcc/../include \
  -DGCC_INCLUDE_DIR=\"/usr/local/lib/gcc-lib/vax-dec-ultrix4.3/2.95.2/include\" \
  -DGPLUSPLUS_INCLUDE_DIR=\"/usr/local/lib/gcc-lib/vax-dec-ultrix4.3/2.95.2/../../../..`echo /usr/local | sed -e 's|^/usr/local||' -e 's|/[^/]*|/..|g'`/include/g++-3\" \
  -DLOCAL_INCLUDE_DIR=\"/usr/local/include\" \
  -DCROSS_INCLUDE_DIR=\"/usr/local/lib/gcc-lib/vax-dec-ultrix4.3/2.95.2/../../../../vax-dec-ultrix4.3/sys-include\" \
  -DTOOL_INCLUDE_DIR=\"/usr/local/lib/gcc-lib/vax-dec-ultrix4.3/2.95.2/../../../../vax-dec-ultrix4.3/include\" \
  -c `echo ../../gcc/cccp.c | sed 's,^\./,,'`
../../gcc/cccp.c: In function `main':
../../gcc/cccp.c:2098: warning: comparison between signed and unsigned
xgcc: Internal compiler error: program cc1 got fatal signal 11
make[2]: *** [cccp.o] Error 1
make[2]: Leaving directory `/usr/local/src/gnu/gcc-2.95.2/objdir/gcc'
make[1]: *** [bootstrap-lean] Error 2
make[1]: Leaving directory `/usr/local/src/gnu/gcc-2.95.2/objdir/gcc'
make: *** [bootstrap-lean] Error 2

The following patch from the main branch is installed:

Wed Aug 25 01:36:11 1999  John David Anglin  <dave@hiauly1.hia.nrc.ca>

        * calls.c (emit_call_1): Use call_pop/call_value_pop for all values
	of n_popped when call/call_value are not defined.

The segmentation fault occurs in reload_cse_noop_set_p (set, insn).  The
regno for the source of the set (sreg) is 768.  This is either a garbage
value or a pseudo.  The rtx x computed from reg_values[sreg] is garbage
and causes the fault.

The actual fault likely happened somewhere else since I don't think there
are supposed to be any psuedo's around at this point.  Should there be
a test in reload_cse_noop_set_p for pseudo's?

-- 
J. David Anglin                                  dave.anglin@nrc.ca
National Research Council of Canada              (613) 990-0752 (FAX: 952-6605)