On 20/11/13 09:22, Yvan Roux wrote:
> Hi,
>
> as Richard said, only a subset of rclass is allowed to be returned by
> preferred_reload_class. I've tested the attached patched in Thumb
> mode, on ARMv5, A9 and A9hf and on cross A15 without regression.
>
> Yvan
>
> 2013-11-20 Yvan Roux <yvan.r...@linaro.org>
>
> PR target/58785
> * config/arm/arm.c (arm_preferred_reload_class): Only return LO_REGS
> when rclass is GENERAL_REGS.
>
>
> preferred_reload.diff
>
>
> diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
> index 5c53440..63f10bd 100644
> --- a/gcc/config/arm/arm.c
> +++ b/gcc/config/arm/arm.c
> @@ -6882,10 +6882,7 @@ arm_preferred_reload_class (rtx x ATTRIBUTE_UNUSED,
> reg_class_t rclass)
> return rclass;
> else
> {
> - if (rclass == GENERAL_REGS
> - || rclass == HI_REGS
> - || rclass == NO_REGS
> - || rclass == STACK_REG)
> + if (rclass == GENERAL_REGS)
> return LO_REGS;
> else
> return rclass;
>
OK.
R.
