2009-10-28  Paolo Bonzini  <bonzini@gnu.org>

	PR rtl-optimization/41812

	Revert:
	2009-06-27  Paolo Bonzini  <bonzini@gnu.org>

	* df-problems.c (df_md_scratch): New.
	(df_md_alloc, df_md_free): Allocate/free it.
	(df_md_local_compute): Only include live registers in init.
	(df_md_transfer_function): Prune the in-set computed by
	the confluence function, and the gen-set too.

From-SVN: r153652