https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104446
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |segher at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The problem is that combine substutites:
(insn 10 9 11 2 (set (reg/v:SI 7 sp [ a ])
(const_int 0 [0])) "pr104446.c":9:5 81 {*movsi_internal}
(nil))
(insn 13 11 14 2 (set (mem/f:SI (pre_dec:SI (reg/f:SI 7 sp)) [0 S4 A32])
(reg:SI 85)) "pr104446.c":10:3 56 {*pushsi2}
(expr_list:REG_DEAD (reg:SI 85)
(expr_list:REG_ARGS_SIZE (const_int 16 [0x10])
(nil))))
into:
(mem/f:SI (pre_dec:SI (const_int 0 [0])) [0 S4 A32])
and before it is attempted to be recognized, we do:
3347 for_each_inc_dec (newpat, count_auto_inc, &new_n_auto_inc);
and that ICEs because:
3709 poly_int64 size = GET_MODE_SIZE (GET_MODE (mem));
3710 rtx r1 = XEXP (x, 0);
3711 rtx c = gen_int_mode (-size, GET_MODE (r1));
3712 return fn (mem, x, r1, r1, c, data);
gen_int_mode (-4, VOIDmode) is invalid.
