Re: [tree-ssa] Fix some fallout from sbitmap -> bitmap transition

[Daniel Berlin <dberlin at dberlin dot org>]

On Saturday, April 26, 2003, at 03:50  PM, Jan Vroonhof wrote:

> elim_create uses bitmap_clear_bit inside an EXECUTE_IF_SET_IN_BITMAP.
> This might potentially free the bitmap block we are currently walking.
> [this does indeed happen with a noddy example and -ftree-copyprop].
>
> After applying this fix said noddy example starts crashing in its
> usual place (edge splitting) again.
>
> 2003-04-26  Jan Vroonhof  <jan dot vroonhof at ntlworld dot com>
>
> 	* bitmap.h (EXECUTE_IF_SET_IN_BITMAP_CLEAR): New bitmap walking
> 	macro. Clear bit when iterating over it. Primitive initial
> 	implementation (does not free data block when it turns out to be
> 	empty after walk).

If you are walking the entire bitmap, the whole thing is clear when you 
are done with it, and you can just use bitmap_clear (which will free 
the elements) after the EXECUTE_IF_SET_IN_BITMAP call.