pike.git/ src/ docode.c

2008-01-29

2008-01-29 20:08:39 by Henrik Grubbström (Grubba) <grubba@grubba.org>

• dcbf335c25849000fd048a59e5ea694fd4cd49bb (29 lines) (+19/-10) ^{[ Show | Annotate ]}
  Branch: 7.9

Added ltosval-style optimization for efun calls.
Caveat: I've most likely missed to exclude some efuns it doesn't work for.

Rev: src/docode.c:1.195

2:   || This file is part of Pike. For copyright information see COPYRIGHT.   || Pike is distributed under GPL, LGPL and MPL. See the file COPYING   || for more information. - || $Id: docode.c,v 1.194 2008/01/29 15:24:25 grubba Exp $ + || $Id: docode.c,v 1.195 2008/01/29 20:08:39 grubba Exp $   */      #include "global.h"
1210:    emit0(n->token);    return n->token==F_ASSIGN;    } - #if 0 -  /* Not enabled, since it has side effects if the function throws. */ +     case F_APPLY:    if ((CAAR(n)->token == F_CONSTANT) &&    (CAAR(n)->u.sval.type == T_FUNCTION) && -  (CAAR(n)->u.sval.subtype == FUNCTION_BUILTIN)) { +  (CAAR(n)->u.sval.subtype == FUNCTION_BUILTIN) && +  (CAAR(n)->u.sval.u.efun->function != f_map) && +  (CAAR(n)->u.sval.u.efun->function != f_filter)) {    /* efuns typically don't access object variables. */    node *args = CDAR(n);    if (args) { -  if (args->token == F_ARG_LIST) { -  } else if (node_is_eq(CDR(n), args)) { +  node **arg = my_get_arg(&args, 0); +  if (arg && node_is_eq(CDR(n), *arg)) { +  /* First arg is the lvalue. +  * +  * We optimize this to allow for destructive operations. +  */ +  int no = 0;    tmp1 = do_docode(CDR(n), DO_LVALUE); -  emit0(F_LTOSVAL1); +  emit0(F_MARK_AND_CONST0); +  PUSH_CLEANUP_FRAME(do_pop_mark, 0); +  while ((arg = my_get_arg(&args, ++no)) && *arg) { +  do_docode(*arg, 0); +  }    tmp1=store_constant(&CAAR(n)->u.sval,    !(CAAR(n)->tree_info & OPT_EXTERNAL_DEPEND),    CAAR(n)->name); -  emit1(F_CALL_BUILTIN1, DO_NOT_WARN((INT32)tmp1)); -  emit0(n->token); +  emit1(F_LTOSVAL_CALL_BUILTIN_AND_ASSIGN, DO_NOT_WARN((INT32)tmp1)); +  POP_AND_DONT_CLEANUP;    return 1;    }    }    } - #endif /* 0 */ +        default:    switch(CDR(n)->token)