[PATCH][V2] rs6000: Remove unnecessary option manipulation.

[Martin Liška]

PING^1

On 11/4/21 13:36, Martin Liška wrote:
> Sending the patch in a separate thread.
> 
> Ready for master?
> 
> Cheers,
> Martin
> 
> gcc/ChangeLog:
> 
>      * config/rs6000/rs6000.c (rs6000_override_options_after_change):
>      Do not set flag_rename_registers, it's already enabled with
>      EnabledBy(funroll-loops).
>      Use EnabledBy for unroll_only_small_loops.
>      * config/rs6000/rs6000.opt: Use EnabledBy for
>      unroll_only_small_loops.
> ---
>   gcc/config/rs6000/rs6000.c   | 7 +------
>   gcc/config/rs6000/rs6000.opt | 2 +-
>   2 files changed, 2 insertions(+), 7 deletions(-)
> 
> diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
> index 01a95591a5d..b9dddcd0aa1 100644
> --- a/gcc/config/rs6000/rs6000.c
> +++ b/gcc/config/rs6000/rs6000.c
> @@ -3472,13 +3472,8 @@ rs6000_override_options_after_change (void)
>     /* Explicit -funroll-loops turns -munroll-only-small-loops off, and
>        turns -frename-registers on.  */
>     if ((OPTION_SET_P (flag_unroll_loops) && flag_unroll_loops)
> -       || (OPTION_SET_P (flag_unroll_all_loops)
> -       && flag_unroll_all_loops))
> +       || (OPTION_SET_P (flag_unroll_all_loops) && flag_unroll_all_loops))
>       {
> -      if (!OPTION_SET_P (unroll_only_small_loops))
> -    unroll_only_small_loops = 0;
> -      if (!OPTION_SET_P (flag_rename_registers))
> -    flag_rename_registers = 1;
>         if (!OPTION_SET_P (flag_cunroll_grow_size))
>       flag_cunroll_grow_size = 1;
>       }
> diff --git a/gcc/config/rs6000/rs6000.opt b/gcc/config/rs6000/rs6000.opt
> index 9d7878f144a..faeb7423ca7 100644
> --- a/gcc/config/rs6000/rs6000.opt
> +++ b/gcc/config/rs6000/rs6000.opt
> @@ -546,7 +546,7 @@ Target Undocumented Var(rs6000_optimize_swaps) Init(1) Save
>   Analyze and remove doubleword swaps from VSX computations.
> 
>   munroll-only-small-loops
> -Target Undocumented Var(unroll_only_small_loops) Init(0) Save
> +Target Undocumented Var(unroll_only_small_loops) Init(0) Save EnabledBy(funroll-loops)
>   ; Use conservative small loop unrolling.
> 
>   mpower9-misc