[patch, fortran] PR 30381, PR 30420: Fix constant-folding in bitwise intrinsics

[Brooks Moses]

Steve Kargl wrote:
> OK with a few changes.  In a few places you have error messages of the
> form
> 
> +	gfc_error
> +	  ("Magnitude of second argument of ISHFTC exceeds third argument "
> +	   "at %L", &s->where);
> 
> Please unwrap this to
> 
> 	gfc_error ("Magnitude of second argument of ISHFTC exceeds third
>                "argument at %L", &s->where);
> 
> Try 'grep gfc_error *.c' to see my justification for the request.
> I'm trying to migrate gfortran source code to a uniform style.

Thanks!  Committed, as attached.  I noticed that there are some similar 
error messages in gfc_simplify_ishft() and other nearby places that I 
didn't touch, but I presume your in-progress series of whitespace 
patches will get those?

- Brooks

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