------- Comment #25 from rguenth at gcc dot gnu dot org 2009-05-02 15:35
-------
Ha, that helped. From looking at the dumps, can you check
Index: gcc/tree-ssa-pre.c
===================================================================
--- gcc/tree-ssa-pre.c (revision 147054)
+++ gcc/tree-ssa-pre.c (working copy)
@@ -4215,7 +4215,9 @@ eliminate (void)
/* If there is a single use only, propagate the equivalency
instead of keeping the copy. */
if (TREE_CODE (lhs) == SSA_NAME
- && single_imm_use (lhs, &use_p, &use_stmt))
+ && single_imm_use (lhs, &use_p, &use_stmt)
+ && may_propagate_copy (USE_FROM_PTR (use_p),
+ gimple_assign_rhs1 (stmt)))
{
SET_USE (use_p, gimple_assign_rhs1 (stmt));
update_stmt (use_stmt);
?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39940
