contrib/gcc/global.c

34 #include "insn-config.h"
127      we can always eliminate an insn by using these, but using a register
128      in the above list won't always eliminate an insn.  */
278 /* Reg pairs for which conflict after the current insn
282 /* Number of pairs in use in this insn.  */
288 /* Record all regs that are set in any one insn.
651      times a register can occur in one insn (surely less than 100)
679   rtx insn;
799       insn = BB_HEAD (b);
807 	  RTX_CODE code = GET_CODE (insn);
819 	      for (link = REG_NOTES (insn);
825 		      = reg_allocno[REGNO (SET_DEST (PATTERN (insn)))];
835 	      note_stores (PATTERN (insn), mark_reg_clobber, NULL);
839 	      for (link = REG_NOTES (insn); link; link = XEXP (link, 1))
848 	      note_stores (PATTERN (insn), mark_reg_store, NULL);
851 	      for (link = REG_NOTES (insn); link; link = XEXP (link, 1))
866 		 before the output reload insn.  */
867 	      if (GET_CODE (PATTERN (insn)) == PARALLEL && multiple_sets (insn))
868 		for (link = REG_NOTES (insn); link; link = XEXP (link, 1))
875 		      for (i = XVECLEN (PATTERN (insn), 0) - 1; i >= 0; i--)
877 			  rtx set = XVECEXP (PATTERN (insn), 0, i);
892 		  rtx note = find_regno_note (insn, REG_UNUSED,
899 	  if (insn == BB_END (b))
901 	  insn = NEXT_INSN (insn);
910    dies in an insn that sets an allocno.  If those two allocnos don't conflict,
916   rtx insn;
923   for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
924     if (INSN_P (insn)
925 	&& (set = single_set (insn)) != 0
928       for (link = REG_NOTES (insn); link; link = XEXP (link, 1))
1496 /* Handle the case where REG is set by the insn being scanned,
1502    Note that even if REG does not remain alive after this insn,
1504    REG and any other regs set in this insn that really do live.
1608 /* Mark REG as being dead (following the insn being scanned now).
1890 	  c->insn = first;
1919 	      /* Mark anything that is set in this insn and then unused as dying.  */
1937 	 the previous real insn is a JUMP_INSN.  */
2063   /* Registers used uninitialized in an insn in which there is an
2147    insn.  */
2156 check_earlyclobber (rtx insn)
2161   extract_insn (insn);
2242    clobbered in the same insn.
2292   rtx insn, bound;
2300       for (insn = BB_HEAD (bb); insn != bound; insn = NEXT_INSN (insn))
2301 	if (INSN_P (insn))
2303 	    note_stores (PATTERN (insn), mark_reg_change, bb);
2304 	    if (check_earlyclobber (insn))
2305 	      note_uses (&PATTERN (insn), mark_reg_use_for_earlyclobber_1, bb);
2457 	 insn if the pseudo-register is used first time in given BB