re PR tree-optimization/23626 (ICE after cunrolling)

	PR tree-optimization/23626
	* tree-cfg.c (replace_uses_by): Clean up eh info.

From-SVN: r103766

gcc/ChangeLog

+2005-09-02  Zdenek Dvorak  <dvorakz@suse.cz>
+
+	PR tree-optimization/23626
+	* tree-cfg.c (replace_uses_by): Clean up eh info.
+
 2005-09-01  DJ Delorie  <dj@redhat.com>
 
 	* config/m32c/m32c.c (m32c_valid_pointer_mode): Remove stray debug

gcc/tree-cfg.c

@@ -1273,6 +1273,10 @@ replace_uses_by (tree name, tree val)
       if (TREE_CODE (rhs) == ADDR_EXPR)
 	recompute_tree_invarant_for_addr_expr (rhs);
 
+      /* If the statement could throw and now cannot, we need to prune cfg.  */
+      if (maybe_clean_or_replace_eh_stmt (stmt, stmt))
+	tree_purge_dead_eh_edges (bb_for_stmt (stmt));
+
       mark_new_vars_to_rename (stmt);
     }