contrib/gcc/combine.c

602 combine_validate_cost (rtx i1, rtx i2, rtx i3, rtx newpat, rtx newi2pat)
614   if (i1)
616       i1_cost = INSN_UID (i1) <= last_insn_cost
617 		? uid_insn_cost[INSN_UID (i1)] : 0;
664 	  if (i1)
668 		       INSN_UID (i1), INSN_UID (i2), INSN_UID (i3));
696   if (i1)
697     uid_insn_cost[INSN_UID (i1)] = 0;
1512 	 i1 or i2 set the same MEM.  */
1821 try_combine (rtx i3, rtx i2, rtx i1, int *new_direct_jump_p)
1864       || (i1 && cant_combine_insn_p (i1))
1885   if (i1 && INSN_CUID (i1) > INSN_CUID (i2))
1886     temp = i1, i1 = i2, i2 = temp;
1906   if (i1 == 0 && NONJUMP_INSN_P (i3) && GET_CODE (PATTERN (i3)) == SET
1971   if (i1 == 0
2116   if (i1 == 0 && GET_CODE (PATTERN (i2)) == PARALLEL
2139 	  i1 = gen_rtx_INSN (VOIDmode, INSN_UID (i2), NULL_RTX, i2,
2146 		 SET_DEST (PATTERN (i1)));
2152   if (! can_combine_p (i2, i3, i1, NULL_RTX, &i2dest, &i2src)
2153       || (i1 && ! can_combine_p (i1, i3, NULL_RTX, i2, &i1dest, &i1src)))
2162   i1dest_in_i1src = i1 && reg_overlap_mentioned_p (i1dest, i1src);
2163   i2dest_in_i1src = i1 && reg_overlap_mentioned_p (i2dest, i1src);
2165   i1dest_killed = i1 && dead_or_set_p (i1, i1dest);
2169   i1_feeds_i3 = i1 && ! reg_overlap_mentioned_p (i1dest, i2src);
2173 			  i1 && i2dest_in_i1src && i1_feeds_i3,
2184       || (i1 != 0 && GET_CODE (i1src) == MULT)
2208 	      || (i1 != 0
2209 		  && reg_overlap_mentioned_p (XEXP (link, 0), PATTERN (i1)))))
2230     = i1 && ! (i1_feeds_i3 ? dead_or_set_p (i3, i1dest)
2250       if (GET_CODE (PATTERN (i1)) == PARALLEL)
2253 	i1pat = copy_rtx (PATTERN (i1));
2276   if (i1 == 0 && added_sets_2 && GET_CODE (PATTERN (i3)) == SET
2354 	  if (i1)
2356 	      subst_low_cuid = INSN_CUID (i1);
2384   if (i1 && GET_CODE (newpat) != CLOBBER)
2389       if ((FIND_REG_INC_NOTE (i1, NULL_RTX) != 0
2403       subst_low_cuid = INSN_CUID (i1);
2412       || (i1 != 0 && FIND_REG_INC_NOTE (i1, NULL_RTX) != 0
2461 	  if (i1 == 0)
2479   if (i1 && GET_CODE (newpat) == PARALLEL
2511       && !(added_sets_2 && i1 == 0)
2564   if (i1 && insn_code_number < 0 && GET_CODE (newpat) == SET
2873   else if (i1 && insn_code_number < 0 && asm_noperands (newpat) < 0
2928   else if (i1 && insn_code_number < 0 && asm_noperands (newpat) < 0
3045   if (!combine_validate_cost (i1, i2, i3, newpat, newi2pat))
3090 		  XEXP (link, 0) = i1;
3109     rtx elim_i1 = (i1 == 0 || i1dest_in_i1src
3118     if (i1)
3119       i1notes = REG_NOTES (i1), i1links = LOG_LINKS (i1);
3215     if (i1)
3217 	LOG_LINKS (i1) = 0;
3218 	REG_NOTES (i1) = 0;
3219 	SET_INSN_DELETED (i1);
3229 	move_deaths (newi2pat, NULL_RTX, INSN_CUID (i1), i2, &midnotes);
3230 	move_deaths (newpat, newi2pat, INSN_CUID (i1), i3, &midnotes);
3233       move_deaths (newpat, NULL_RTX, i1 ? INSN_CUID (i1) : INSN_CUID (i2),
3244       distribute_notes (i1notes, i1, i3, newi2pat ? i2 : NULL_RTX,
3359     if (i1 && REG_P (i1dest))
12002 	     Any clobbers from i2 or i1 can only exist if they were added by
12010 	     i2 or i1 for register which were both used and clobbered, so
12011 	     we keep notes from i2 or i1 if they will turn into REG_DEAD