removed unnecessary test

[r26070]

diff --git a/ir/ir/iropt.c b/ir/ir/iropt.c
index b183ffd..729aa16 100644 (file)
--- a/ir/ir/iropt.c
+++ b/ir/ir/iropt.c
@@ -2820,7 +2820,6 @@ static ir_node *transform_node_Div(ir_node *n) {
        ir_node *a = get_Div_left(n);
        ir_node *b = get_Div_right(n);
        ir_node *value;
-       tarval  *tv;
 
        if (is_Const(b) && is_const_Phi(a)) {
                /* check for Div(Phi, Const) */
@@ -2848,36 +2847,26 @@ static ir_node *transform_node_Div(ir_node *n) {
        }
 
        value = n;
-       tv = value_of(n);
-       if (tv != tarval_bad) {
-               value = new_Const(tv);
 
+       const ir_node *dummy;
+       if (a == b && value_not_zero(a, &dummy)) {
+               /* BEWARE: we can optimize a/a to 1 only if this cannot cause a exception */
+               value = new_Const(get_mode_one(mode));
                DBG_OPT_CSTEVAL(n, value);
                goto make_tuple;
        } else {
-               ir_node       *a = get_Div_left(n);
-               ir_node       *b = get_Div_right(n);
-               const ir_node *dummy;
-
-               if (a == b && value_not_zero(a, &dummy)) {
-                       /* BEWARE: we can optimize a/a to 1 only if this cannot cause a exception */
-                       value = new_Const(get_mode_one(mode));
-                       DBG_OPT_CSTEVAL(n, value);
-                       goto make_tuple;
-               } else {
-                       if (mode_is_signed(mode) && is_Const(b)) {
-                               tarval *tv = get_Const_tarval(b);
+               if (mode_is_signed(mode) && is_Const(b)) {
+                       tarval *tv = get_Const_tarval(b);
 
-                               if (tv == get_mode_minus_one(mode)) {
-                                       /* a / -1 */
-                                       value = new_rd_Minus(get_irn_dbg_info(n), current_ir_graph, get_nodes_block(n), a, mode);
-                                       DBG_OPT_CSTEVAL(n, value);
-                                       goto make_tuple;
-                               }
+                       if (tv == get_mode_minus_one(mode)) {
+                               /* a / -1 */
+                               value = new_rd_Minus(get_irn_dbg_info(n), current_ir_graph, get_nodes_block(n), a, mode);
+                               DBG_OPT_CSTEVAL(n, value);
+                               goto make_tuple;
                        }
-                       /* Try architecture dependent optimization */
-                       value = arch_dep_replace_div_by_const(n);
                }
+               /* Try architecture dependent optimization */
+               value = arch_dep_replace_div_by_const(n);
        }
 
        if (value != n) {