hard-reg-set.h

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do { register HARD_REG_ELT_TYPE *scan_xp_ = (X), *scan_yp_ = (Y); \
     if ((scan_xp_[0] == scan_yp_[0])				\
	 && (scan_xp_[1] == scan_yp_[1])			\
	 && (scan_xp_[2] == scan_yp_[2]))			\
	goto TO; } while (0)

#else
#if FIRST_PSEUDO_REGISTER <= 4*HOST_BITS_PER_WIDE_INT
#define CLEAR_HARD_REG_SET(TO)  \
do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO);		\
     scan_tp_[0] = 0;						\
     scan_tp_[1] = 0;						\
     scan_tp_[2] = 0;						\
     scan_tp_[3] = 0; } while (0)

#define SET_HARD_REG_SET(TO)  \
do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO);		\
     scan_tp_[0] = -1;						\
     scan_tp_[1] = -1;						\
     scan_tp_[2] = -1;						\
     scan_tp_[3] = -1; } while (0)

#define COPY_HARD_REG_SET(TO, FROM)  \
do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM);	\
     scan_tp_[0] = scan_fp_[0];					\
     scan_tp_[1] = scan_fp_[1];					\
     scan_tp_[2] = scan_fp_[2];					\
     scan_tp_[3] = scan_fp_[3]; } while (0)

#define COMPL_HARD_REG_SET(TO, FROM)  \
do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \
     scan_tp_[0] = ~ scan_fp_[0];				\
     scan_tp_[1] = ~ scan_fp_[1];				\
     scan_tp_[2] = ~ scan_fp_[2];				\
     scan_tp_[3] = ~ scan_fp_[3]; } while (0)

#define AND_HARD_REG_SET(TO, FROM)  \
do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \
     scan_tp_[0] &= scan_fp_[0];					\
     scan_tp_[1] &= scan_fp_[1];					\
     scan_tp_[2] &= scan_fp_[2];					\
     scan_tp_[3] &= scan_fp_[3]; } while (0)

#define AND_COMPL_HARD_REG_SET(TO, FROM)  \
do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \
     scan_tp_[0] &= ~ scan_fp_[0];				\
     scan_tp_[1] &= ~ scan_fp_[1];				\
     scan_tp_[2] &= ~ scan_fp_[2];				\
     scan_tp_[3] &= ~ scan_fp_[3]; } while (0)

#define IOR_HARD_REG_SET(TO, FROM)  \
do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \
     scan_tp_[0] |= scan_fp_[0];				\
     scan_tp_[1] |= scan_fp_[1];				\
     scan_tp_[2] |= scan_fp_[2];				\
     scan_tp_[3] |= scan_fp_[3]; } while (0)

#define IOR_COMPL_HARD_REG_SET(TO, FROM)  \
do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \
     scan_tp_[0] |= ~ scan_fp_[0];				\
     scan_tp_[1] |= ~ scan_fp_[1];				\
     scan_tp_[2] |= ~ scan_fp_[2];				\
     scan_tp_[3] |= ~ scan_fp_[3]; } while (0)

#define GO_IF_HARD_REG_SUBSET(X,Y,TO)  \
do { register HARD_REG_ELT_TYPE *scan_xp_ = (X), *scan_yp_ = (Y); \
     if ((0 == (scan_xp_[0] & ~ scan_yp_[0]))			\
	 && (0 == (scan_xp_[1] & ~ scan_yp_[1]))		\
	 && (0 == (scan_xp_[2] & ~ scan_yp_[2]))		\
	 && (0 == (scan_xp_[3] & ~ scan_yp_[3])))		\
	goto TO; } while (0)

#define GO_IF_HARD_REG_EQUAL(X,Y,TO)  \
do { register HARD_REG_ELT_TYPE *scan_xp_ = (X), *scan_yp_ = (Y); \
     if ((scan_xp_[0] == scan_yp_[0])				\
	 && (scan_xp_[1] == scan_yp_[1])			\
	 && (scan_xp_[2] == scan_yp_[2])			\
	 && (scan_xp_[3] == scan_yp_[3]))			\
	goto TO; } while (0)

#else /* FIRST_PSEUDO_REGISTER > 3*HOST_BITS_PER_WIDE_INT */

#define CLEAR_HARD_REG_SET(TO)  \
do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO);		\
     register int i;						\
     for (i = 0; i < HARD_REG_SET_LONGS; i++)			\
       *scan_tp_++ = 0; } while (0)

#define SET_HARD_REG_SET(TO)  \
do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO);		\
     register int i;						\
     for (i = 0; i < HARD_REG_SET_LONGS; i++)			\
       *scan_tp_++ = -1; } while (0)

#define COPY_HARD_REG_SET(TO, FROM)  \
do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \
     register int i;						\
     for (i = 0; i < HARD_REG_SET_LONGS; i++)			\
       *scan_tp_++ = *scan_fp_++; } while (0)

#define COMPL_HARD_REG_SET(TO, FROM)  \
do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \
     register int i;						\
     for (i = 0; i < HARD_REG_SET_LONGS; i++)			\
       *scan_tp_++ = ~ *scan_fp_++; } while (0)

#define AND_HARD_REG_SET(TO, FROM)  \
do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \
     register int i;						\
     for (i = 0; i < HARD_REG_SET_LONGS; i++)			\
       *scan_tp_++ &= *scan_fp_++; } while (0)

#define AND_COMPL_HARD_REG_SET(TO, FROM)  \
do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \
     register int i;						\
     for (i = 0; i < HARD_REG_SET_LONGS; i++)			\
       *scan_tp_++ &= ~ *scan_fp_++; } while (0)

#define IOR_HARD_REG_SET(TO, FROM)  \
do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \
     register int i;						\
     for (i = 0; i < HARD_REG_SET_LONGS; i++)			\
       *scan_tp_++ |= *scan_fp_++; } while (0)

#define IOR_COMPL_HARD_REG_SET(TO, FROM)  \
do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \
     register int i;						\
     for (i = 0; i < HARD_REG_SET_LONGS; i++)			\
       *scan_tp_++ |= ~ *scan_fp_++; } while (0)

#define GO_IF_HARD_REG_SUBSET(X,Y,TO)  \
do { register HARD_REG_ELT_TYPE *scan_xp_ = (X), *scan_yp_ = (Y); \
     register int i;						\
     for (i = 0; i < HARD_REG_SET_LONGS; i++)			\
       if (0 != (*scan_xp_++ & ~ *scan_yp_++)) break;		\
     if (i == HARD_REG_SET_LONGS) goto TO; } while (0)

#define GO_IF_HARD_REG_EQUAL(X,Y,TO)  \
do { register HARD_REG_ELT_TYPE *scan_xp_ = (X), *scan_yp_ = (Y); \
     register int i;						\
     for (i = 0; i < HARD_REG_SET_LONGS; i++)			\
       if (*scan_xp_++ != *scan_yp_++) break;			\
     if (i == HARD_REG_SET_LONGS) goto TO; } while (0)

#endif
#endif
#endif
#endif

/* Define some standard sets of registers.  */

/* Indexed by hard register number, contains 1 for registers
   that are fixed use (stack pointer, pc, frame pointer, etc.).
   These are the registers that cannot be used to allocate
   a pseudo reg whose life does not cross calls.  */

extern char fixed_regs[FIRST_PSEUDO_REGISTER];

/* The same info as a HARD_REG_SET.  */

extern HARD_REG_SET fixed_reg_set;

/* Indexed by hard register number, contains 1 for registers
   that are fixed use or are clobbered by function calls.
   These are the registers that cannot be used to allocate
   a pseudo reg whose life crosses calls.  */

extern char call_used_regs[FIRST_PSEUDO_REGISTER];

/* The same info as a HARD_REG_SET.  */

extern HARD_REG_SET call_used_reg_set;
  
/* Registers that we don't want to caller save.  */
extern HARD_REG_SET losing_caller_save_reg_set;

/* Indexed by hard register number, contains 1 for registers that are
   fixed use -- i.e. in fixed_regs -- or a function value return register
   or STRUCT_VALUE_REGNUM or STATIC_CHAIN_REGNUM.  These are the
   registers that cannot hold quantities across calls even if we are
   willing to save and restore them.  */

extern char call_fixed_regs[FIRST_PSEUDO_REGISTER];

/* The same info as a HARD_REG_SET.  */

extern HARD_REG_SET call_fixed_reg_set;

/* Indexed by hard register number, contains 1 for registers
   that are being used for global register decls.
   These must be exempt from ordinary flow analysis
   and are also considered fixed.  */

extern char global_regs[FIRST_PSEUDO_REGISTER];

/* Table of register numbers in the order in which to try to use them.  */

#ifdef REG_ALLOC_ORDER   /* Avoid undef symbol in certain broken linkers.  */
extern int reg_alloc_order[FIRST_PSEUDO_REGISTER];
#endif

/* For each reg class, a HARD_REG_SET saying which registers are in it.  */

extern HARD_REG_SET reg_class_contents[];

/* For each reg class, number of regs it contains.  */

extern int reg_class_size[N_REG_CLASSES];

/* For each reg class, table listing all the containing classes.  */

extern enum reg_class reg_class_superclasses[N_REG_CLASSES][N_REG_CLASSES];

/* For each reg class, table listing all the classes contained in it.  */

extern enum reg_class reg_class_subclasses[N_REG_CLASSES][N_REG_CLASSES];

/* For each pair of reg classes,
   a largest reg class contained in their union.  */

extern enum reg_class reg_class_subunion[N_REG_CLASSES][N_REG_CLASSES];

/* For each pair of reg classes,
   the smallest reg class that contains their union.  */

extern enum reg_class reg_class_superunion[N_REG_CLASSES][N_REG_CLASSES];

/* Number of non-fixed registers.  */

extern int n_non_fixed_regs;

/* Vector indexed by hardware reg giving its name.  */

extern char *reg_names[FIRST_PSEUDO_REGISTER];