[PATCH] Release some SSA_NAMEs

[Jeffrey Law]

On Tue, 2007-01-02 at 17:32 -0800, Robert Kennedy wrote:
> Attached is a patch suggested by Zdenek to release SSA_NAMEs that
> become disused as a result of basic block merging. More work appears
> to be required to release all virtual SSA_NAMEs that become disused,
> but in my testing this patch seems sufficient to be able to iterate
> simply over all real (non-virtual) SSA_NAMEs currently in use.
> 
> Bootstrapped and tested on i686-pc-linux-gnu.
> 
> 	-- Robert Kennedy
> 
> 		    ------------------------------
> 
> 2007-01-02  Robert Kennedy <jimbob@google.com>
> 
> 	* tree-cfg.c (tree_merge_blocks): Release SSA_NAME phi results
> 	whose definitions are deleted due to basic block merging.
Approved.  Please install.

Thanks,
Jeff