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#include "stack-man.h"
#include "simplex86.h"
typedef struct reg_alloc_t reg_alloc_t;
typedef struct reg_pool_t reg_pool_t;
#define MAX_REGISTERS (16)
#define MAX_SPILLS (16)
struct reg_pool_t
{
int n_registers;
reg_t registers[MAX_REGISTERS];
};
struct reg_alloc_t
{
const reg_pool_t * pool;
int allocated[MAX_REGISTERS];
int clobbered[MAX_REGISTERS];
int failed;
};
void
reg_alloc_init (reg_alloc_t *ra,
const reg_pool_t *reg_pool);
/* This resurrects a register that has been freed, but is known
* to still contain a useful value.
*/
reg_t
reg_alloc_alloc_preserve (reg_alloc_t *ra, reg_t reg);
reg_t
reg_alloc_alloc (reg_alloc_t *ra);
void
reg_alloc_free (reg_alloc_t *ra, reg_t reg);
int
reg_alloc_failed (reg_alloc_t *ra);
int
reg_alloc_clobbered (reg_alloc_t *ra, reg_t reg);
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