ir_node *be_get_start_proj(ir_graph *const irg, be_start_info_t *const info)
{
if (!info->irn) {
/* This is already the transformed start node. */
ir_node *const start = get_irg_start(irg);
arch_register_class_t const *const cls = arch_get_irn_register_req_out(start, info->pos)->cls;
info->irn = new_r_Proj(start, cls ? cls->mode : mode_M, info->pos);
}
return info->irn;
}
static unsigned get_start_reg_index(ir_graph *irg, const arch_register_t *reg)
{
/* do a naive linear search... */
ir_node *start = get_irg_start(irg);
be_foreach_out(start, i) {
arch_register_req_t const *const out_req
= arch_get_irn_register_req_out(start, i);
if (out_req->limited == NULL)
continue;
if (out_req->cls != reg->cls)
continue;
if (!rbitset_is_set(out_req->limited, reg->index))
continue;
return i;
}
