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/*
* This file is part of libFirm.
* Copyright (C) 2012 University of Karlsruhe.
*/
/**
* @file
* @brief Backend irg - a ir_graph with additional analysis information.
* @author Matthias Braun
* @date 05.05.2006
*/
#ifndef FIRM_BE_BEIRG_H
#define FIRM_BE_BEIRG_H
#include "be.h"
#include "be_types.h"
#include "be_t.h"
#include "irgraph_t.h"
void be_assure_live_sets(ir_graph *irg);
void be_assure_live_chk(ir_graph *irg);
/**
* Liveness is invalid (call when nodes have been added but the control
* flow has not been changed)
*/
void be_invalidate_live_sets(ir_graph *irg);
/**
* Call when control flow has changed.
* be_invalidate_live_sets() is called.
*/
void be_invalidate_live_chk(ir_graph *irg);
/**
* frees all memory allocated by birg structures (liveness, ...).
* The memory of the birg structure itself is not freed.
*/
void be_free_birg(ir_graph *irg);
/**
* An ir_graph with additional analysis data about this irg. Also includes some
* backend structures
*/
typedef struct be_irg_t {
be_main_env_t *main_env;
be_lv_t *lv;
/** bitset of registers available for the allocator */
unsigned *allocatable_regs;
/** bitset of registers for which verification errors are not reported.
* A typical use is for the stackpointer for which SSA form is only built
* once late in the compilation. May be NULL. */
const unsigned *non_ssa_regs;
/** obstack (mainly used to keep register constraints which we can't keep
* in the irg obst, because it gets replaced during code selection) */
struct obstack obst;
/** Architecture specific per-graph data */
void *isa_link;
bool has_returns_twice_call;
} be_irg_t;
static inline be_irg_t *be_birg_from_irg(const ir_graph *irg)
{
return (be_irg_t*) irg->be_data;
}
static inline be_main_env_t *be_get_irg_main_env(const ir_graph *irg)
{
return be_birg_from_irg(irg)->main_env;
}
static inline be_lv_t *be_get_irg_liveness(const ir_graph *irg)
{
return be_birg_from_irg(irg)->lv;
}
static inline struct obstack *be_get_be_obst(const ir_graph *irg)
{
be_irg_t *const birg = be_birg_from_irg(irg);
struct obstack *const obst = &birg->obst;
assert(obstack_object_size(obst) == 0);
return obst;
}
static inline void record_returns_twice(ir_graph *const irg, ir_type *const type)
{
if (get_method_additional_properties(type) & mtp_property_returns_twice)
be_birg_from_irg(irg)->has_returns_twice_call = true;
}
#endif
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