On 07/31/16 12:43, Bernd Edlinger wrote:
> I found out that the trouble starts one instruction earlier:
>
> (insn 19 40 20 2 (set (subreg:DI (reg:QI 93) 0)
> ) pr.c:8 50 {*movdi_aarch64}
> (expr_list:REG_DEAD (reg:DI 110 [ D.3037 ])
> (nil)))
>
oops, my e-mail missed one line
that's what the insn actually looks like:
(insn 19 40 20 2 (set (subreg:DI (reg:QI 93) 0)
(const_int 255 [0xff])) pr.c:8 50 {*movdi_aarch64}
(expr_list:REG_DEAD (reg:DI 110 [ D.3037 ])
(nil)))
So we can say reg:QI 93 is 255, but have no idea
what an expression like (subreg:DI (reg:QI 93) 0) will
evaluate to.
Bernd.
