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/*
* This file is part of libFirm.
* Copyright (C) 2012 University of Karlsruhe.
*/
/**
* @file
* @brief Contains some useful function for the backend.
* @author Sebastian Hack
*/
#ifndef FIRM_BE_BEUTIL_H
#define FIRM_BE_BEUTIL_H
#include "entity_t.h"
#include "firm_types.h"
#include "irprog_t.h"
#include "be_types.h"
/**
* Returns an array (an ARR_F) of the programs blocks in reverse postorder
* (note: caller has to free the memory with DEL_ARR_F after use;
* of course you can use ARR_LEN on the array too.)
*/
ir_node **be_get_cfgpostorder(ir_graph *irg);
static inline bool is_tls_entity(const ir_entity *const ent)
{
return get_entity_owner(ent) == get_tls_type();
}
/**
* Insert a Perm which permutes all (non-ignore) live values of a given register class
* before a certain instruction.
* @param lv Liveness Information.
* @param irn The node to insert the Perm before.
* @return The Perm or NULL if nothing was live before @p irn.
*/
ir_node *insert_Perm_before(ir_graph *irg, const arch_register_class_t *cls,
ir_node *irn);
/**
* Removes dead nodes from schedule
* @param irg the graph
*/
void be_remove_dead_nodes_from_schedule(ir_graph *irg);
/**
* Keep the given node alive, if it has no users, by adding a be_Keep.
*
* @param node The node to kept alive.
*/
void be_keep_if_unused(ir_node *node);
#endif
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