gcc/gcc ChangeLog basic-block.h cfg.c cfgloop. ...

[rakdver@gcc.gnu.org]

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	rakdver@gcc.gnu.org	2003-03-05 22:05:19

Modified files:
	gcc            : ChangeLog basic-block.h cfg.c cfgloop.c 
	                 cfgloop.h cfgloopanal.c cfgloopmanip.c cfgrtl.c 
	                 loop-unroll.c loop-unswitch.c 

Log message:
	* basic-block.h (EDGE_IRREDUCIBLE_LOOP, EDGE_ALL_FLAGS): New.
	* cfg.c (dump_edge_info): Add EDGE_IRREDUCIBLE_LOOP flag dump.
	* cfgloop.c (flow_loop_free): Made global.
	(establish_preds): New static function.
	(flow_loop_tree_node_add): Handle subloops of added loop correctly.
	(get_loop_exit_edges): New.
	(verify_loop_structure): Verify EDGE_IRREDUCIBLE_LOOP flags.
	* cfgloop.h (flow_loop_free, get_loop_exit_edges, unloop): Declare.
	* cfgloopanal.c (mark_irreducible_loops): Mark edges in irreducible
	loops.
	* cfgloopmanip.c (loop_delete_branch_edge): Allow to test for
	removability of an edge.
	(fix_irreducible_loops): New static function.
	(find_path, remove_path): Add ability to remove enclosing loops.
	(unloop): New.
	(copy_bbs, duplicate_loop_to_header_edge): Use EDGE_IRREDUCIBLE_LOOP
	flags.
	* cfgrtl.c (verify_flow_info): Handle EDGE_IRREDUCIBLE_LOOP flag.
	* loop-unroll.c (peel_loops_completely): Do not duplicate loop if
	not neccessary.
	(decide_peel_completely, peel_loops_completely): Allow complete peeling
	of non-duplicable once rolling loops.
	* loop-unswitch.c (unswitch_loop): Update EDGE_IRREDUCIBLE_LOOP flags.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=1.16950&r2=1.16951
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/basic-block.h.diff?cvsroot=gcc&r1=1.169&r2=1.170
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cfg.c.diff?cvsroot=gcc&r1=1.41&r2=1.42
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cfgloop.c.diff?cvsroot=gcc&r1=1.20&r2=1.21
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cfgloop.h.diff?cvsroot=gcc&r1=1.5&r2=1.6
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cfgloopanal.c.diff?cvsroot=gcc&r1=1.2&r2=1.3
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cfgloopmanip.c.diff?cvsroot=gcc&r1=1.5&r2=1.6
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cfgrtl.c.diff?cvsroot=gcc&r1=1.66&r2=1.67
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/loop-unroll.c.diff?cvsroot=gcc&r1=1.2&r2=1.3
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/loop-unswitch.c.diff?cvsroot=gcc&r1=1.2&r2=1.3