+/**
+ * This function just sets the register for the Unknown node
+ * as this is not done during register allocation because Unknown
+ * is an "ignore" node.
+ */
+static ir_node *gen_Unknown(ia32_transform_env_t *env) {
+ ir_mode *mode = env->mode;
+ ir_node *irn = env->irn;
+
+ if (mode_is_float(mode)) {
+ if (USE_SSE2(env->cg))
+ arch_set_irn_register(env->cg->arch_env, irn, &ia32_xmm_regs[REG_XMM_UKNWN]);
+ else
+ arch_set_irn_register(env->cg->arch_env, irn, &ia32_vfp_regs[REG_VFP_UKNWN]);
+ }
+ else if (mode_is_int(mode) || mode_is_reference(mode)) {
+ arch_set_irn_register(env->cg->arch_env, irn, &ia32_gp_regs[REG_GP_UKNWN]);
+ }
+ else {
+ assert(0 && "unsupported Unknown-Mode");
+ }
+
+ return NULL;
+}