r192378 - in /trunk/gcc: ChangeLog ira-build.c ...

[steven@gcc.gnu.org]

Author: steven
Date: Thu Oct 11 18:54:47 2012
New Revision: 192378

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=192378
Log:

	* ira-build.c (ira_loop_tree_body_rev_postorder): New function.
	(ira_traverse_loop_tree): Traverse a loop's basic blocks in
	reverse post-order of the reversed control-flow direction.
	* ira-conflicts.c (ira_build_conflicts): Pass add_copies as
	the pre-order function to ira_traverse_loop_tree to preserve
	the existing semantics.

	* ira-lives.c (remove_some_program_points_and_update_live_ranges):
	Squeeze out live range chain elements if their program points are
	connected.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/ira-build.c
    trunk/gcc/ira-conflicts.c
    trunk/gcc/ira-lives.c