Build failure for 19990608 snapshot on alpha-dec-osf4.0e

[Rodney Brown]

Same behaviour as 0602

rm -f SYSCALLS.c tmp-SYSCALLS.s
stage1/xgcc -Bstage1/ -B/usr/local/alpha-dec-osf4.0e/bin/ \
    -c -DIN_GCC -DHAIFA -O2 -g -O2 -DHAVE_CONFIG_H \
    -I. -I../../egcs-19990608/gcc -I../../egcs-19990608/gcc/config \
    -I../../egcs-19990608/gcc/../include ../../egcs-19990608/gcc/gcov.c
../../egcs-19990608/gcc/gcov.c: In function `output_data':
../../egcs-19990608/gcc/gcov.c:1403: fixed or forbidden register 32 ($f0) was spilled for class FLOAT_REGS.
../../egcs-19990608/gcc/gcov.c:1403: This may be due to a compiler bug or to impossible asm
../../egcs-19990608/gcc/gcov.c:1403: statements or clauses.
../../egcs-19990608/gcc/gcov.c:1403: This is the instruction:
(insn 2638 2634 18 (set (reg:DF 398)
        (mem/u:DF (reg:DI 384) 0)) 279 {movsf-2} (insn_list 2632 (nil))
    (expr_list:REG_EQUIV (const_double:DF (mem/u:DF (symbol_ref/u:DI ("*$LC28")) 0) 4636737291354636288 [0x4059000000000000] 0 [0x0] [100])
        (nil)))
make[2]: *** [gcov.o] Error 1
make[2]: Leaving directory `/user/rand/rdb/src/egcs-19990608.obj/gcc'
make[1]: *** [bootstrap-lean] Error 2
make[1]: Leaving directory `/user/rand/rdb/src/egcs-19990608.obj/gcc'
make: *** [bootstrap-lean] Error 2