[PATCH 3/8] [RS6000] rs6000_rtx_costs tidy AND

[Alan Modra]

Ping.

On Tue, Jan 12, 2021 at 02:01:57PM +1030, Alan Modra wrote:
> Ping
> https://gcc.gnu.org/pipermail/gcc-patches/2020-October/555754.html
> 
> On Thu, Oct 08, 2020 at 09:27:55AM +1030, Alan Modra wrote:
> > 	* config/rs6000/rs6000.c (rs6000_rtx_costs): Tidy AND code.
> > 	Don't avoid recursion on const_int shift count.
> > 
> > diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
> > index e870ba0039a..bc5e51aa5ce 100644
> > --- a/gcc/config/rs6000/rs6000.c
> > +++ b/gcc/config/rs6000/rs6000.c
> > @@ -21253,6 +21253,7 @@ static bool
> >  rs6000_rtx_costs (rtx x, machine_mode mode, int outer_code,
> >  		  int opno ATTRIBUTE_UNUSED, int *total, bool speed)
> >  {
> > +  rtx right;
> >    int code = GET_CODE (x);
> >  
> >    switch (code)
> > @@ -21430,7 +21431,9 @@ rs6000_rtx_costs (rtx x, machine_mode mode, int outer_code,
> >        return false;
> >  
> >      case AND:
> > -      if (CONST_INT_P (XEXP (x, 1)))
> > +      *total = COSTS_N_INSNS (1);
> > +      right = XEXP (x, 1);
> > +      if (CONST_INT_P (right))
> >  	{
> >  	  rtx left = XEXP (x, 0);
> >  	  rtx_code left_code = GET_CODE (left);
> > @@ -21439,17 +21442,13 @@ rs6000_rtx_costs (rtx x, machine_mode mode, int outer_code,
> >  	  if ((left_code == ROTATE
> >  	       || left_code == ASHIFT
> >  	       || left_code == LSHIFTRT)
> > -	      && rs6000_is_valid_shift_mask (XEXP (x, 1), left, mode))
> > +	      && rs6000_is_valid_shift_mask (right, left, mode))
> >  	    {
> > -	      *total = rtx_cost (XEXP (left, 0), mode, left_code, 0, speed);
> > -	      if (!CONST_INT_P (XEXP (left, 1)))
> > -		*total += rtx_cost (XEXP (left, 1), SImode, left_code, 1, speed);
> > -	      *total += COSTS_N_INSNS (1);
> > +	      *total += rtx_cost (XEXP (left, 0), mode, left_code, 0, speed);
> > +	      *total += rtx_cost (XEXP (left, 1), SImode, left_code, 1, speed);
> >  	      return true;
> >  	    }
> >  	}
> > -
> > -      *total = COSTS_N_INSNS (1);
> >        return false;
> >  
> >      case IOR:

-- 
Alan Modra
Australia Development Lab, IBM