r192517 - in /trunk/gcc: cfgexpand.c dse.c gimp...

[ebotcazou@gcc.gnu.org]

Author: ebotcazou
Date: Tue Oct 16 22:49:07 2012
New Revision: 192517

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=192517
Log:
	PR rtl-optimization/54870
	* tree.h (TREE_ADDRESSABLE): Document special usage on SSA_NAME.
	* cfgexpand.c (update_alias_info_with_stack_vars ): Set it on the
	SSA_NAME pointer that points to a partition if there is at least
	one variable with it set in the partition.
	* dse.c (local_variable_can_escape): New predicate.
	(can_escape): Call it.
	* gimplify.c (mark_addressable): If this is a partitioned decl, also
	mark the SSA_NAME pointer that points to a partition.

Modified:
    trunk/gcc/cfgexpand.c
    trunk/gcc/dse.c
    trunk/gcc/gimplify.c
    trunk/gcc/tree.h