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[Bug tree-optimization/15982] [3.5 Regression] ICE in tree-ssa-pre due to GVN-PRE


------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-06-21 21:57 -------
Subject: Bug 15982

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	dberlin@gcc.gnu.org	2004-06-21 21:57:34

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

Log message:
	2004-06-21  Daniel Berlin  <dberlin@dberlin.org>
	
	Fix PR optimization/15982
	* tree-ssa-pre.c: Update a few comments and todos to
	reflect constants change.
	(get_value_handle): Constants now value number to themselves.
	(lookup): Constants lookup to themselves.
	(add_to_value): Adjust to always be on.
	(set_contains_value): Adjust for constants change.
	(find_leader): Ditto.
	(phi_translate): 'r' nodes are never ANTIC right now.
	(valid_in_set): Ditto.
	(get_expr_set): New function.
	(find_or_generate_expression): New function, broken out from
	insert_aux.
	(create_expression_by_pieces): Ditto, plus additional
	machinery to handle complex values.
	(compute_avail): Remove dead RETURN_EXPR handling.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.4065&r2=2.4066
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-pre.c.diff?cvsroot=gcc&r1=2.15&r2=2.16



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15982


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