gcc 2.96 (RedHat): ICE in spill_failure on legal source (fwd)

[abbott@module.dima.unige.it]

Had to gzip source file to fit within emailer limits... sorry.

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ENVIRONMENT:
$ g++ -v
Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/2.96/specs
gcc version 2.96 20000731 (Red Hat Linux 7.0)

$ uname -a
Linux indet.dima.unige.it 2.2.16-22 #1 Tue Aug 22 16:49:06 EDT 2000 i686
unknown

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TO REPRODUCE BUG:
gunzip BUG.C.gz       #where BUG.C.gz refers to the file in attachment
g++ -O2 BUG.C

NB. "g++ BUG.C" does not reproduce the bug

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ERROR MESSAGE COMPILER GAVE:
$ g++ -O2 BUG.C
PPregistry.C: In method `PPregistry::elem *PPregistry::register_front
() const':
PPregistry.C:39: cannot convert `pair<const PPregistry::elem,
PPregistry::elem *>' to `PPregistry::elem *' in return
PPregistry.C:52: Unable to find a register to spill in class `AREG'.
PPregistry.C:52: This is the insn:
(insn 187 186 192 (parallel[
            (set (reg:SI 81)
                (udiv:SI (reg:SI 1 edx)
                    (reg:SI 3 ebx)))
            (set (reg:SI 1 edx)
                (umod:SI (reg:SI 1 edx)
                    (reg:SI 3 ebx)))
            (clobber (reg:CC 17 flags))
        ] ) 153 {udivmodsi4} (insn_list 159 (insn_list 186 (nil)))
    (expr_list:REG_DEAD (reg:SI 1 edx)
        (expr_list:REG_DEAD (reg:SI 3 ebx)
            (expr_list:REG_UNUSED (reg:SI 81)
                (expr_list:REG_UNUSED (reg:CC 17 flags)
                    (nil))))))
PPregistry.C:52: Internal compiler error in spill_failure, at reload1.c
:1826
Please submit a full bug report.
See <URL: http://www.gnu.org/software/gcc/bugs.html > for instructions.

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