egcs-19990112 crash building glibc-2.0.109

[Horst von Brand]

i586/UP, linux-2.2.0-pre6-ac2, haifa-enabled egcs-19990112,
binutils-2.9.1.0.19a

The build crashes with:

gcc ../sysdeps/libm-ieee754/s_casinf.c -c -O2 -Wall -Winline -Wstrict-prototypes -Wwrite-strings -march=pentium   -g0 -O99 -fomit-frame-pointer -D__USE_STRING_INLINES   -Wno-uninitialized -Wno-write-strings  -I../include -I. -I/usr/src/build/build-glibc-2.0.109/math -I.. -I../libio  -I/usr/src/build/build-glibc-2.0.109 -I../sysdeps/i386/elf -I../crypt/sysdeps/unix -I../linuxthreads/sysdeps/unix/sysv/linux -I../linuxthreads/sysdeps/pthread -I../linuxthreads/sysdeps/unix/sysv -I../linuxthreads/sysdeps/unix -I../linuxthreads/sysdeps/i386 -I../linuxthreads/sysdeps/pthread/no-cmpxchg -I../sysdeps/unix/sysv/linux/i386 -I../sysdeps/unix/sysv/linux -I../sysdeps/gnu -I../sysdeps/unix/common -I../sysdeps/unix/mman -I../sysdeps/unix/inet -I../sysdeps/unix/sysv/i386 -I../sysdeps/unix/sysv -I../sysdeps/unix/i386 -I../sysdeps/unix -I../sysdeps/posix -I../sysdeps/i386/i586 -I../sysdeps/i386/i486 -I../sysdeps/i386/fpu -I../sysdeps/libm-i387 -I../sysdeps/i386 -I../sysdeps/wordsize-32 -I../sysd!
eps/ieee754 -I../sysdeps/libm-ieee754 -I../sysdeps/generic/elf -I../sysdeps/generic   -D_LIBC_REENTRANT -include ../include/libc-symbols.h     -D__NO_MATH_INLINES -D__LIBC_INTERNAL_MATH_INLINES -o /usr/src/build/build-glibc-2.0.109/math/s_casinf.o
../sysdeps/libm-ieee754/s_casinf.c: In function `__casinf':
../sysdeps/libm-ieee754/s_casinf.c:61: fixed or forbidden register 0 (ax) was spilled for class AREG.
../sysdeps/libm-ieee754/s_casinf.c:61: This may be due to a compiler bug or to impossible asm
../sysdeps/libm-ieee754/s_casinf.c:61: statements or clauses.
../sysdeps/libm-ieee754/s_casinf.c:61: This is the instruction:
(insn 46 44 47 (parallel[ 
            (set (cc0)
                (compare:CCFPEQ (reg:DF 9 %st(1))
                    (reg:DF 8 %st(0))))
            (clobber (scratch:HI))
        ] ) 32 {*cmpsf_cc_1-1} (insn_list 41 (insn_list 44 (nil)))
    (expr_list:REG_DEAD (reg:DF 9 %st(1))
        (expr_list:REG_DEAD (reg:DF 8 %st(0))
            (expr_list:REG_UNUSED (scratch:HI)
                (nil)))))
../../egcs-19990112/gcc/toplev.c:1397: Internal compiler error in function fatal_insn
Please submit a full bug report to `egcs-bugs@cygnus.com'.
See <URL: http://egcs.cygnus.com/faq.html#bugreport > for details.

The same crash is exhibited by this snippet:

__complex__ float
__casinf(__complex__ float x)
{
  if(__real__ x == 0.0)
    return x;
}

egcs-2.91.60, 2.92.25, 2.92.27 work. 2.92.33 and 2.93.01 crash the same
way.

Hope this helps.
-- 
Horst von Brand                             vonbrand@sleipnir.valparaiso.cl
Casilla 9G, Viña del Mar, Chile                               +56 32 672616