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	2003-07-16 22:02:17

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

Log message:
	* tree-ssa-dom.c (get_eq_expr_value): Also enter expressions
	into the available expression hash table.  Callers changed to
	pass in the block_avail_exprs varray and const_and_copies hash
	table.
	(optimize_stmt): Allow optimization of the condition in
	a COND_EXPR statement.
	(lookup_avail_expr): For COND_EXPRs, just see if their condition
	has been recorded into the hash table, do not enter them into
	the hash table.  Only do a lookup of the result in the
	const_and_copies table if it is an SSA_VAR.
	(avail_expr_hash): Handle COND_EXPRs, specifically we only care
	about their condition and virtual operands.
	(avail_expr_eq): Likewise.  If one statement has virtual operands
	and the other does not, then the expressions are not equal.

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=1.1.2.497&r2=1.1.2.498
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=1.1.2.3&r2=1.1.2.4