sdcc/src/z80/peeph-z80n.def

   1 // peeph-z80n.def - Z80N specific peephole rules
   2 //
   3 // (c) Philipp Klaus Krause (pkk@spth.de, philipp@colecovision.eu) 2006 - 2020
   4 //
   5 // This program is free software; you can redistribute it and/or modify it
   6 // under the terms of the GNU General Public License as published by the
   7 // Free Software Foundation; either version 2, or (at your option) any
   8 // later version.
   9 //
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software
  17 // Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19 replace restart {
  20         push    #%1
  21 } by {
  22         ;Z80N peephole 1: replace push %1 by ld %2,#%1 / push %2
  23         ld      %2, #%1
  24         push    %2
  25 } if unusedReg(%2 'bc' 'de' 'hl')
  26
  27 barrier