[PATCH] C-SKY: Use default for TARGET_CAN_CHANGE_MODE_CLASS.

[PATCH] C-SKY: Use default for TARGET_CAN_CHANGE_MODE_CLASS.

[Geng Qi]

gcc/ChangeLog:

	* config/csky/csky.c (csky_can_change_mode_class): Delete.
	For csky, HF/SF mode use the low bits of VREGS.
---
 gcc/config/csky/csky.c | 16 ----------------
 1 file changed, 16 deletions(-)

diff --git a/gcc/config/csky/csky.c b/gcc/config/csky/csky.c
index 7f2af82..67cdf9c 100644
--- a/gcc/config/csky/csky.c
+++ b/gcc/config/csky/csky.c
@@ -611,9 +611,6 @@ csky_default_logical_op_non_short_circuit (void)
 #undef TARGET_MODES_TIEABLE_P
 #define TARGET_MODES_TIEABLE_P csky_modes_tieable_p
 
-#undef TARGET_CAN_CHANGE_MODE_CLASS
-#define TARGET_CAN_CHANGE_MODE_CLASS csky_can_change_mode_class
-
 #undef	TARGET_CONDITIONAL_REGISTER_USAGE
 #define TARGET_CONDITIONAL_REGISTER_USAGE csky_conditional_register_usage
 
@@ -2373,19 +2370,6 @@ csky_modes_tieable_p (machine_mode mode1, machine_mode mode2)
 	   && (mode1 == DFmode || mode2 == DFmode));
 }
 
-/* Implement TARGET_CAN_CHANGE_MODE_CLASS.
-   V_REG registers can't do subreg as all values are reformatted to
-   internal precision.  */
-
-static bool
-csky_can_change_mode_class (machine_mode from,
-			    machine_mode to,
-			    reg_class_t rclass)
-{
-  return (GET_MODE_SIZE (from) == GET_MODE_SIZE (to)
-	  || !reg_classes_intersect_p (V_REGS, rclass));
-}
-
 /* Implement TARGET_CLASS_LIKELY_SPILLED_P.
    We need to define this for MINI_REGS when we only use r0 - r7.
    Otherwise we can end up using r0-r4 for function arguments, and don't
-- 
2.7.4

Re: [PATCH] C-SKY: Use default for TARGET_CAN_CHANGE_MODE_CLASS.

[Cooper Qu]

merged.


On 4/30/21 9:02 PM, Geng Qi wrote:
> gcc/ChangeLog:
>
> 	* config/csky/csky.c (csky_can_change_mode_class): Delete.
> 	For csky, HF/SF mode use the low bits of VREGS.
> ---
>   gcc/config/csky/csky.c | 16 ----------------
>   1 file changed, 16 deletions(-)
>
> diff --git a/gcc/config/csky/csky.c b/gcc/config/csky/csky.c
> index 7f2af82..67cdf9c 100644
> --- a/gcc/config/csky/csky.c
> +++ b/gcc/config/csky/csky.c
> @@ -611,9 +611,6 @@ csky_default_logical_op_non_short_circuit (void)
>   #undef TARGET_MODES_TIEABLE_P
>   #define TARGET_MODES_TIEABLE_P csky_modes_tieable_p
>   
> -#undef TARGET_CAN_CHANGE_MODE_CLASS
> -#define TARGET_CAN_CHANGE_MODE_CLASS csky_can_change_mode_class
> -
>   #undef	TARGET_CONDITIONAL_REGISTER_USAGE
>   #define TARGET_CONDITIONAL_REGISTER_USAGE csky_conditional_register_usage
>   
> @@ -2373,19 +2370,6 @@ csky_modes_tieable_p (machine_mode mode1, machine_mode mode2)
>   	   && (mode1 == DFmode || mode2 == DFmode));
>   }
>   
> -/* Implement TARGET_CAN_CHANGE_MODE_CLASS.
> -   V_REG registers can't do subreg as all values are reformatted to
> -   internal precision.  */
> -
> -static bool
> -csky_can_change_mode_class (machine_mode from,
> -			    machine_mode to,
> -			    reg_class_t rclass)
> -{
> -  return (GET_MODE_SIZE (from) == GET_MODE_SIZE (to)
> -	  || !reg_classes_intersect_p (V_REGS, rclass));
> -}
> -
>   /* Implement TARGET_CLASS_LIKELY_SPILLED_P.
>      We need to define this for MINI_REGS when we only use r0 - r7.
>      Otherwise we can end up using r0-r4 for function arguments, and don't