[Bug rtl-optimization/47166] [4.5/4.6 Regression] SpecCpu2000 Ammp segfaults for ARM with -O3 -mthumb

[bernds at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47166

--- Comment #8 from Bernd Schmidt <bernds at gcc dot gnu.org> 2011-01-11 15:45:34 UTC ---
I think the real problem here is that when reloading autoincs, we somehow end
up with 

(gdb) p spill_reg_store[3]
$42 = (rtx) 0xf7a1118c
(gdb) pr
(insn 3163 3161 3164 99 rectmm.c:1041 (set (reg:SI 1 r1)
        (plus:SI (reg:SI 1 r1)
            (const_int 280 [0x118]))) 4 {*arm_addsi3} (nil))

which doesn't set R3 at all - insn 3164 does.