gcc/gcc ChangeLog.tree-ssa tree-ssa-pre.c

[dberlin@gcc.gnu.org]

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	tree-ssa-20020619-branch
Changes by:	dberlin@gcc.gnu.org	2003-03-05 17:34:19

Modified files:
	gcc            : ChangeLog.tree-ssa tree-ssa-pre.c 

Log message:
	2003-03-03  Daniel Berlin  <dberlin@dberlin.org>
	
	* tree-ssa-pre.c (is_strred_cand): Temporarily disable strength
	reduction while working on bootstrapping.
	(requires_edge_placement): Reenable for now, until an insertion
	infrastructure exists that can handle critical edges.
	(count_stmts_in_bb): New function, used for verifying we do
	insertions properly.
	(update_old_new): Fix up bb heads as well.
	(do_proper_save): Handle single statement bb properly.
	Handle BB's contained in BIND_EXPRS.
	(code_motion): Count number of statements in bb before and after
	to make sure we don't screw up boundaries.
	(finalize_1): Ditto.
	(rename_2): Fix subtle rename bug.
	(phi_opnd_from_res): Do this the right way, by cloning the
	occurrence and modifying it, as every other PRE implementation
	does.
	(tree_perform_ssapre): Handle comparisons too (unary exprs
	currently disabled till load PRE is reimplemented).
	(reset_can_be_avail): Fix can_be_avail test.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.tree-ssa.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.2.259&r2=1.1.2.260
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-pre.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.4.49&r2=1.1.4.50