use is_Const_0 not is_Const_null in fucom creation

[r16408]

diff --git a/ir/be/ia32/ia32_transform.c b/ir/be/ia32/ia32_transform.c
index 00e5e28..73c6c94 100644 (file)
--- a/ir/be/ia32/ia32_transform.c
+++ b/ir/be/ia32/ia32_transform.c
@@ -255,6 +255,8 @@ static ir_node *gen_Const(ir_node *node) {
        dbg_info        *dbgi  = get_irn_dbg_info(node);
        ir_mode         *mode  = get_irn_mode(node);
 
+       assert(is_Const(node));
+
        if (mode_is_float(mode)) {
                ir_node   *res   = NULL;
                ir_node   *noreg = ia32_new_NoReg_gp(env_cg);
@@ -2415,7 +2417,7 @@ static ir_node *create_Fucom(ir_node *node)
                set_ia32_commutative(new_node);
                SET_IA32_ORIG_NODE(new_node, ia32_get_old_node_name(env_cg, node));
        } else {
-               if(ia32_cg_config.use_ftst && is_Const_null(right)) {
+               if(ia32_cg_config.use_ftst && is_Const_0(right)) {
                        new_node = new_rd_ia32_vFtstFnstsw(dbgi, irg, new_block, new_left,
                                                           0);
                } else {