contrib/gcc/optabs.c

135 /* Add a REG_EQUAL note to the last insn in INSNS.  TARGET is being set to
142    don't add the REG_EQUAL note but return 0.  Our caller can then try
149   rtx note;
194     note = gen_rtx_fmt_e (code, GET_MODE (target), copy_rtx (op0));
196     note = gen_rtx_fmt_ee (code, GET_MODE (target), copy_rtx (op0), copy_rtx (op1));
198   set_unique_reg_note (last_insn, REG_EQUAL, note);
1346 	     REG_EQUAL note to it.  If we can't because TEMP conflicts with an
1471       /* If TARGET is the same as one of the operands, the REG_EQUAL note
1546 	  /* If TARGET is the same as one of the operands, the REG_EQUAL note
1597       /* If TARGET is the same as one of the operands, the REG_EQUAL note
3281    note indicating that it doesn't conflict with the (also multi-word)
3292    EQUIV, if nonzero, is an expression to be placed into a REG_EQUAL note
3318       rtx note;
3325       if ((note = find_reg_note (insn, REG_LIBCALL, NULL)) != NULL)
3326 	remove_note (insn, note);
3327       if ((note = find_reg_note (insn, REG_RETVAL, NULL)) != NULL)
3328 	remove_note (insn, note);
3381       /* Remove any existing REG_EQUAL note from "last", or else it will
3382 	 be mistaken for a note referring to the full contents of the
3384 	 note added below.  An existing note can come from an insn
3410    note with an operand of EQUIV.
3443 	    rtx note = find_reg_note (insn, REG_EH_REGION, NULL_RTX);
3445 	    if (note != 0 && INTVAL (XEXP (note, 0)) <= 0)
3446 	      remove_note (insn, note);
3451      reg note to indicate that this call cannot throw or execute a nonlocal
3452      goto (unless there is already a REG_EH_REGION note, in which case
3457 	  rtx note = find_reg_note (insn, REG_EH_REGION, NULL_RTX);
3459 	  if (note != 0)
3460 	    XEXP (note, 0) = constm1_rtx;
3475       rtx note;
3479       if ((note = find_reg_note (insn, REG_LIBCALL, NULL)) != NULL)
3480 	remove_note (insn, note);
3481       if ((note = find_reg_note (insn, REG_RETVAL, NULL)) != NULL)
3482 	remove_note (insn, note);
3533       /* Remove any existing REG_EQUAL note from "last", or else it will
3534 	 be mistaken for a note referring to the full contents of the
3535 	 libcall value when found together with the REG_RETVAL note added
3536 	 below.  An existing note can come from an insn expansion at
3960   /* Attach a REG_EQUAL note describing the semantics of the libcall to