regalloc.h


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#include "codex86.h"

typedef struct RegAlloc RegAlloc;

RegAlloc *reg_alloc_new            (Asm      *a);
void      reg_alloc_normalize      (RegAlloc *ra);
op_t      reg_alloc_get_register   (RegAlloc *ra,
				    op_t      op);
op_t      reg_alloc_alloc_gp       (RegAlloc *ra);
op_t      reg_alloc_alloc_mmx      (RegAlloc *ra);
op_t      reg_alloc_alloc_sse      (RegAlloc *ra);
op_t      reg_alloc_alloc_gp_force (RegAlloc *ra,
				    reg_t     reg);
op_t      reg_alloc_get_register_or_memory (RegAlloc *ra, op_t);

/* It is allowed to read a variable immediately after
 * deallocating it. New variables may be allocated in
 * the same slot, but this is fine because instructions
 * work when both operands are the same register. In
 * other words, a decallocated register remains usable until
 * someone has written into a newly allocated variable.
 */
void      reg_alloc_dealloc        (RegAlloc *ra,
				    op_t      var);