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

[law@gcc.gnu.org]

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	tree-ssa-20020619-branch
Changes by:	law@gcc.gnu.org	2003-07-21 23:07:08

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

Log message:
	* tree-ssa-dom.c (tree_ssa_dominator_optimize): If we made any
	blocks unreachable, repeat the dominator optimizations.
	(optimize_block): Enter PHIs with a single source argument into
	the const_and_copies table.  When propagating into a PHI node,
	break the loop over the PHI arguments when a propagation is performed.
	If the PHI agument is not an SSA_VAR, then no propagation is possible.
	(optimize_stmt): If an operand is not an SSA_VAR, then no propagation
	is possible/needed.

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=1.1.2.504&r2=1.1.2.505
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-dom.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.2.6&r2=1.1.2.7