gcc/gcc ChangeLog toplev.h flags.h tree-flow.h ...

[law@gcc.gnu.org]

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	law@gcc.gnu.org	2004-05-18 02:53:56

Modified files:
	gcc            : ChangeLog toplev.h flags.h tree-flow.h 
	                 tree-phinodes.c tree-ssa-dom.c tree.h 

Log message:
	* toplev.h (flag_delete_null_pointer_checks): Move from here to...
	* flags.h (flag_delete_null_pointer_checks): Here.
	* tree-flow.h (cprop_into_successor_phis): Add argument to prototype.
	* tree-phinodes.c (resize_phi_node): Initialize PHI_ARG_NONZERO.
	(add_phi_arg, remove_phi_arg_num): Similarly.
	* tree-ssa-copy.c (cprop_into_successor_phis): Propagate nonzero
	property into PHI nodes.
	* tree-ssa-dom.c: Remove redundant inclusion of flags.h.
	(record_equivalences_from_phis): If all PHI arguments are known to be
	nonzero, then the result must be nonzero as well.
	(cprop_into_phis): Pass nonzero_vars bitmap to cprop_into_successor_phis        (record_equivalences_from_stmt): Check flag_delete_null_pointer_checks
	appropriately.  Walk the USE-DEF chains and propagate nonzero property
	as appropriate.
	* tree.h (PHI_ARG_NONZERO): Define.
	(phi_arg_d): Add nonzero flag.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.3680&r2=2.3681
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/toplev.h.diff?cvsroot=gcc&r1=1.120&r2=1.121
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/flags.h.diff?cvsroot=gcc&r1=1.138&r2=1.139
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-flow.h.diff?cvsroot=gcc&r1=2.3&r2=2.4
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-phinodes.c.diff?cvsroot=gcc&r1=2.1&r2=2.2
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-dom.c.diff?cvsroot=gcc&r1=2.4&r2=2.5
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree.h.diff?cvsroot=gcc&r1=1.492&r2=1.493