Fix opt/fehler180

[libfirm] / ir / ir / iropt.c

diff --git a/ir/ir/iropt.c b/ir/ir/iropt.c
index f90d692..2c17270 100644 (file)
--- a/ir/ir/iropt.c
+++ b/ir/ir/iropt.c
@@ -2404,19 +2404,19 @@ restart:
                /* a - (b - c) -> a + (c - b)
                 *             -> (a - b) + c iff (b - c) is a pointer */
                dbg_info *s_dbg   = get_irn_dbg_info(b);
-               ir_node  *s_block = get_nodes_block(b);
                ir_node  *s_left  = get_Sub_left(b);
                ir_node  *s_right = get_Sub_right(b);
                ir_mode  *s_mode  = get_irn_mode(b);
                if (mode_is_reference(s_mode)) {
-                       ir_node  *sub     = new_rd_Sub(s_dbg, s_block, a, s_left, mode);
+                       ir_node  *lowest_block = get_nodes_block(n); /* a and b are live here */
+                       ir_node  *sub     = new_rd_Sub(s_dbg, lowest_block, a, s_left, mode);
                        dbg_info *a_dbg   = get_irn_dbg_info(n);
-                       ir_node  *a_block = get_nodes_block(n);
 
                        if (s_mode != mode)
-                               s_right = new_r_Conv(a_block, s_right, mode);
-                       n = new_rd_Add(a_dbg, a_block, sub, s_right, mode);
+                               s_right = new_r_Conv(lowest_block, s_right, mode);
+                       n = new_rd_Add(a_dbg, lowest_block, sub, s_right, mode);
                } else {
+                       ir_node  *s_block = get_nodes_block(b);
                        ir_node  *sub     = new_rd_Sub(s_dbg, s_block, s_right, s_left, s_mode);
                        dbg_info *a_dbg   = get_irn_dbg_info(n);
                        ir_node  *a_block = get_nodes_block(n);