Handle redirection blocks with clobbers

[Jakub Jelinek]

On Mon, Apr 20, 2015 at 11:14:03AM -0600, Jeff Law wrote:
>    while (!gsi_end_p (gsi)
>  	 && (gimple_code (gsi_stmt (gsi)) == GIMPLE_LABEL
>  	     || is_gimple_debug (gsi_stmt (gsi))
> -	     || gimple_nop_p (gsi_stmt (gsi))))
> +	     || gimple_nop_p (gsi_stmt (gsi))
> +	     || (gimple_code (gsi_stmt (gsi)) == GIMPLE_ASSIGN

Why this line?  There is no need to test for GIMPLE_ASSIGN
(and canonical test for that would be is_gimple_assign (gsi_stmt (gsi))
anyway),

> +		 && gimple_clobber_p (gsi_stmt (gsi)))))

gimple_clobber_p checks for that too.

	Jakub