contrib/gcc/combine.c

36    LOG_LINKS does not have links for use of the CC0.  They don't
717   rtx links, nextlinks;
786 	  for (links = REG_NOTES (insn); links; links = XEXP (links, 1))
787 	    if (REG_NOTE_KIND (links) == REG_INC)
788 	      set_nonzero_bits_and_sign_copies (XEXP (links, 0), NULL_RTX,
831 	      /* Try this insn with each insn it links back to.  */
833 	      for (links = LOG_LINKS (insn); links; links = XEXP (links, 1))
834 		if ((next = try_combine (insn, XEXP (links, 0),
840 	      for (links = LOG_LINKS (insn); links; links = XEXP (links, 1))
842 		  rtx link = XEXP (links, 0);
903 	      /* Finally, see if any of the insns that this insn links to
906 	      for (links = LOG_LINKS (insn); links; links = XEXP (links, 1))
907 		if (NONJUMP_INSN_P (XEXP (links, 0))
908 		    && GET_CODE (PATTERN (XEXP (links, 0))) == SET
909 		    && reg_mentioned_p (cc0_rtx, SET_SRC (PATTERN (XEXP (links, 0))))
910 		    && (prev = prev_nonnote_insn (XEXP (links, 0))) != 0
913 		    && (next = try_combine (insn, XEXP (links, 0),
920 	      for (links = LOG_LINKS (insn); links; links = XEXP (links, 1))
921 		for (nextlinks = XEXP (links, 1); nextlinks;
923 		  if ((next = try_combine (insn, XEXP (links, 0),
928 	      /* Try this insn with each REG_EQUAL note it links back to.  */
929 	      for (links = LOG_LINKS (insn); links; links = XEXP (links, 1))
932 		  rtx temp = XEXP (links, 0);
3330 	   I3's links points to an insn that sets I2DEST.  If it does,
11121   rtx links, set;
11128   for (links = LOG_LINKS (insn); links;)
11130       insn = XEXP (links, 0);
11137 	  links = XEXP (links, 1);
11150 	  links = LOG_LINKS (insn);
12273 			  /* Move the notes and links of TEM elsewhere.
12339 			  rtx links = LOG_LINKS (place);
12341 			  distribute_links (links);
12507 distribute_links (rtx links)
12511   for (link = links; link; link = next_link)
12522 	 register it was for.  Such links wouldn't be used by combine
12546 	 since most links don't point very far away.  */