contrib/gcc/reg-stack.c

251 static int stack_regs_mentioned_p (rtx pat);
279 stack_regs_mentioned_p (rtx pat)
284   if (STACK_REG_P (pat))
287   fmt = GET_RTX_FORMAT (GET_CODE (pat));
288   for (i = GET_RTX_LENGTH (GET_CODE (pat)) - 1; i >= 0; i--)
294 	  for (j = XVECLEN (pat, i) - 1; j >= 0; j--)
295 	    if (stack_regs_mentioned_p (XVECEXP (pat, i, j)))
298       else if (fmt[i] == 'e' && stack_regs_mentioned_p (XEXP (pat, i)))
419 get_true_reg (rtx *pat)
422     switch (GET_CODE (*pat))
429 	  if (FP_REG_P (subreg = SUBREG_REG (*pat)))
433 						   SUBREG_BYTE (*pat),
434 						   GET_MODE (*pat));
435 	      *pat = FP_MODE_REG (REGNO (subreg) + regno_off,
438 	      return pat;
444 	pat = & XEXP (*pat, 0);
449 	  return pat;
450 	pat = & XEXP (*pat, 0);
969 move_for_stack_reg (rtx insn, stack regstack, rtx pat)
971   rtx *psrc =  get_true_reg (&SET_SRC (pat));
972   rtx *pdest = get_true_reg (&SET_DEST (pat));
1111   rtx pat;
1114   pat = gen_rtx_SET (VOIDmode, dest, not_a_num);
1115   PATTERN (insn) = pat;
1118   return move_for_stack_reg (insn, regstack, pat);
1127 swap_rtx_condition_1 (rtx pat)
1132   if (COMPARISON_P (pat))
1134       PUT_CODE (pat, swap_condition (GET_CODE (pat)));
1139       fmt = GET_RTX_FORMAT (GET_CODE (pat));
1140       for (i = GET_RTX_LENGTH (GET_CODE (pat)) - 1; i >= 0; i--)
1146 	      for (j = XVECLEN (pat, i) - 1; j >= 0; j--)
1147 		r |= swap_rtx_condition_1 (XVECEXP (pat, i, j));
1150 	    r |= swap_rtx_condition_1 (XEXP (pat, i));
1160   rtx pat = PATTERN (insn);
1164   if (GET_CODE (pat) == SET
1165       && REG_P (SET_DEST (pat))
1166       && REGNO (SET_DEST (pat)) == FLAGS_REG)
1171       pat = PATTERN (insn);
1178   if (GET_CODE (pat) == SET
1179       && GET_CODE (SET_SRC (pat)) == UNSPEC
1180       && XINT (SET_SRC (pat), 1) == UNSPEC_FNSTSW)
1182       rtx dest = SET_DEST (pat);
1202       pat = PATTERN (insn);
1203       if (GET_CODE (pat) != SET
1204 	  || GET_CODE (SET_SRC (pat)) != UNSPEC
1205 	  || XINT (SET_SRC (pat), 1) != UNSPEC_SAHF
1213       pat = PATTERN (insn);
1216   if (swap_rtx_condition_1 (pat))
1232 	  swap_rtx_condition_1 (pat);
1338 subst_stack_regs_pat (rtx insn, stack regstack, rtx pat)
1343   switch (GET_CODE (pat))
1348       src = get_true_reg (&XEXP (pat, 0));
1364 	dest = get_true_reg (&XEXP (pat, 0));
1369 	    if (pat != PATTERN (insn))
1424 	dest = get_true_reg (&SET_DEST (pat));
1425 	src  = get_true_reg (&SET_SRC (pat));
1426 	pat_src = SET_SRC (pat);
1434 	    control_flow_insn_deleted |= move_for_stack_reg (insn, regstack, pat);