Fixed Sub(Conv, Conv) optimization

[r16356]

diff --git a/ir/ir/iropt.c b/ir/ir/iropt.c
index f0dae40..2d88fa8 100644 (file)
--- a/ir/ir/iropt.c
+++ b/ir/ir/iropt.c
@@ -2311,16 +2311,16 @@ restart:
 
                if (mode == get_irn_mode(b)) {
                        ir_mode *ma, *mb;
-
-                       a = get_Conv_op(a);
-                       b = get_Conv_op(b);
+                       ir_node *op_a = get_Conv_op(a);
+                       ir_node *op_b = get_Conv_op(b);
 
                        /* check if it's allowed to skip the conv */
-                       ma = get_irn_mode(a);
-                       mb = get_irn_mode(b);
+                       ma = get_irn_mode(op_a);
+                       mb = get_irn_mode(op_b);
 
                        if (mode_is_reference(ma) && mode_is_reference(mb)) {
                                /* SubInt(ConvInt(aP), ConvInt(bP)) -> SubInt(aP,bP) */
+                               a = op_a; b = op_b;
                                set_Sub_left(n, a);
                                set_Sub_right(n, b);