`unrecognizable insn' regression in x86 Fortran tests

[Dave Love]

This test is currently failing on i586-pc-linux-gnu with -O1, which it
wasn't previously (previously to when, I'm not sure):

/home/fx/c-e/egcs/gcc/testsuite/g77.f-torture/compile/980310-3.f:255: internal e
rror--unrecognizable insn:
(insn:QI 1995 1992 466 (set (reg:DF 8 %st(0))
        (mem/s:DF (plus:SI (mem/u:SI (plus:SI (reg:SI 6 %ebp)
                        (const_int 44)) 0)
                (reg:SI 1 %edx)) 0)) -1 (insn_list 457 (nil))
    (nil))
../../egcs/gcc/toplev.c:1374: Internal compiler error in function fatal_insn

Could someone backend-competent take a look?