lcode.c File Reference

#include <stdlib.h>
#include "lua.h"
#include "lcode.h"
#include "ldebug.h"
#include "ldo.h"
#include "lgc.h"
#include "llex.h"
#include "lmem.h"
#include "lobject.h"
#include "lopcodes.h"
#include "lparser.h"
#include "lstring.h"
#include "ltable.h"
#include "lvm.h"

Go to the source code of this file.

Macros
#define	lcode_c
#define	LUA_CORE
#define	hasjumps(e)   ((e)->t != (e)->f)

Functions
static int	isnumeral (expdesc *e)
void	luaK_nil (FuncState *fs, int from, int n)
int	luaK_jump (FuncState *fs)
void	luaK_ret (FuncState *fs, int first, int nret)
static int	condjump (FuncState *fs, OpCode op, int A, int B, int C)
static void	fixjump (FuncState *fs, int pc, int dest)
int	luaK_getlabel (FuncState *fs)
static int	getjump (FuncState *fs, int pc)
static Instruction *	getjumpcontrol (FuncState *fs, int pc)
static int	need_value (FuncState *fs, int list)
static int	patchtestreg (FuncState *fs, int node, int reg)
static void	removevalues (FuncState *fs, int list)
static void	patchlistaux (FuncState *fs, int list, int vtarget, int reg, int dtarget)
static void	dischargejpc (FuncState *fs)
void	luaK_patchlist (FuncState *fs, int list, int target)
LUAI_FUNC void	luaK_patchclose (FuncState *fs, int list, int level)
void	luaK_patchtohere (FuncState *fs, int list)
void	luaK_concat (FuncState *fs, int *l1, int l2)
static int	luaK_code (FuncState *fs, Instruction i)
int	luaK_codeABC (FuncState *fs, OpCode o, int a, int b, int c)
int	luaK_codeABx (FuncState *fs, OpCode o, int a, unsigned int bc)
static int	codeextraarg (FuncState *fs, int a)
int	luaK_codek (FuncState *fs, int reg, int k)
void	luaK_checkstack (FuncState *fs, int n)
void	luaK_reserveregs (FuncState *fs, int n)
static void	freereg (FuncState *fs, int reg)
static void	freeexp (FuncState *fs, expdesc *e)
static int	addk (FuncState *fs, TValue *key, TValue *v)
int	luaK_stringK (FuncState *fs, TString *s)
int	luaK_numberK (FuncState *fs, lua_Number r)
static int	boolK (FuncState *fs, int b)
static int	nilK (FuncState *fs)
void	luaK_setreturns (FuncState *fs, expdesc *e, int nresults)
void	luaK_setoneret (FuncState *fs, expdesc *e)
void	luaK_dischargevars (FuncState *fs, expdesc *e)
static int	code_label (FuncState *fs, int A, int b, int jump)
static void	discharge2reg (FuncState *fs, expdesc *e, int reg)
static void	discharge2anyreg (FuncState *fs, expdesc *e)
static void	exp2reg (FuncState *fs, expdesc *e, int reg)
void	luaK_exp2nextreg (FuncState *fs, expdesc *e)
int	luaK_exp2anyreg (FuncState *fs, expdesc *e)
void	luaK_exp2anyregup (FuncState *fs, expdesc *e)
void	luaK_exp2val (FuncState *fs, expdesc *e)
int	luaK_exp2RK (FuncState *fs, expdesc *e)
void	luaK_storevar (FuncState *fs, expdesc *var, expdesc *ex)
void	luaK_self (FuncState *fs, expdesc *e, expdesc *key)
static void	invertjump (FuncState *fs, expdesc *e)
static int	jumponcond (FuncState *fs, expdesc *e, int cond)
void	luaK_goiftrue (FuncState *fs, expdesc *e)
void	luaK_goiffalse (FuncState *fs, expdesc *e)
static void	codenot (FuncState *fs, expdesc *e)
void	luaK_indexed (FuncState *fs, expdesc *t, expdesc *k)
static int	constfolding (OpCode op, expdesc *e1, expdesc *e2)
static void	codearith (FuncState *fs, OpCode op, expdesc *e1, expdesc *e2, int line)
static void	codecomp (FuncState *fs, OpCode op, int cond, expdesc *e1, expdesc *e2)
void	luaK_prefix (FuncState *fs, UnOpr op, expdesc *e, int line)
void	luaK_infix (FuncState *fs, BinOpr op, expdesc *v)
void	luaK_posfix (FuncState *fs, BinOpr op, expdesc *e1, expdesc *e2, int line)
void	luaK_fixline (FuncState *fs, int line)
void	luaK_setlist (FuncState *fs, int base, int nelems, int tostore)

Macro Definition Documentation

hasjumps

#define hasjumps

(

e

)

((e)->t != (e)->f)

Definition at line 29 of file lua-5.2.4/src/lcode.c.

Referenced by exp2reg(), luaK_exp2anyreg(), luaK_exp2anyregup(), luaK_exp2val(), and luaK_indexed().

lcode_c

#define lcode_c

Definition at line 10 of file lua-5.2.4/src/lcode.c.

LUA_CORE

#define LUA_CORE

Definition at line 11 of file lua-5.2.4/src/lcode.c.

Function Documentation

addk()

static int addk ( FuncState * fs, TValue * key, TValue * v )

static

Definition at line 291 of file lua-5.2.4/src/lcode.c.

                                                        {
  lua_State *L = fs->ls->L;
  TValue *idx = luaH_set(L, fs->h, key);
  Proto *f = fs->f;
  int k, oldsize;
  if (ttisnumber(idx)) {
    lua_Number n = nvalue(idx);
    lua_number2int(k, n);
    if (luaV_rawequalobj(&f->k[k], v))
      return k;
    /* else may be a collision (e.g., between 0.0 and "\0\0\0\0\0\0\0\0");
       go through and create a new entry for this value */
  }
  /* constant not found; create a new entry */
  oldsize = f->sizek;
  k = fs->nk;
  /* numerical value does not need GC barrier;
     table has no metatable, so it does not need to invalidate cache */
  setnvalue(idx, cast_num(k));
  luaM_growvector(L, f->k, k, f->sizek, TValue, MAXARG_Ax, "constants");
  while (oldsize < f->sizek) setnilvalue(&f->k[oldsize++]);
  setobj(L, &f->k[k], v);
  fs->nk++;
  luaC_barrier(L, f, v);
  return k;
}

References cast_num, FuncState::f, FuncState::h, Proto::k, LexState::L, FuncState::ls, lua_number2int, luaC_barrier, luaH_set(), luaM_growvector, luaV_rawequalobj, MAXARG_Ax, FuncState::nk, nvalue, setnilvalue, setnvalue, setobj, Proto::sizek, and ttisnumber.

Referenced by boolK(), luaK_numberK(), luaK_stringK(), and nilK().

boolK()

static int boolK ( FuncState * fs, int b )

static

Definition at line 343 of file lua-5.2.4/src/lcode.c.

                                        {
  TValue o;
  setbvalue(&o, b);
  return addk(fs, &o, &o);
}

References addk(), and setbvalue.

Referenced by luaK_exp2RK().

code_label()

static int code_label ( FuncState * fs, int A, int b, int jump )

static

Definition at line 415 of file lua-5.2.4/src/lcode.c.

                                                              {
  luaK_getlabel(fs);  /* those instructions may be jump targets */
  return luaK_codeABC(fs, OP_LOADBOOL, A, b, jump);
}

References luaK_codeABC, luaK_getlabel(), and OP_LOADBOOL.

Referenced by exp2reg().

codearith()

static void codearith ( FuncState * fs, OpCode op, expdesc * e1, expdesc * e2, int line )

static

Definition at line 724 of file lua-5.2.4/src/lcode.c.

                                                           {
  if (constfolding(op, e1, e2))
    return;
  else {
    int o2 = (op != OP_UNM && op != OP_LEN) ? luaK_exp2RK(fs, e2) : 0;
    int o1 = luaK_exp2RK(fs, e1);
    if (o1 > o2) {
      freeexp(fs, e1);
      freeexp(fs, e2);
    }
    else {
      freeexp(fs, e2);
      freeexp(fs, e1);
    }
    e1->u.info = luaK_codeABC(fs, op, 0, o1, o2);
    e1->k = VRELOCABLE;
    luaK_fixline(fs, line);
  }
}

References constfolding(), freeexp(), expdesc::info, expdesc::k, luaK_codeABC, luaK_exp2RK(), luaK_fixline(), OP_LEN, OP_UNM, expdesc::u, and VRELOCABLE.

Referenced by luaK_posfix(), and luaK_prefix().

codecomp()

static void codecomp ( FuncState * fs, OpCode op, int cond, expdesc * e1, expdesc * e2 )

static

Definition at line 746 of file lua-5.2.4/src/lcode.c.

                                                                       {
  int o1 = luaK_exp2RK(fs, e1);
  int o2 = luaK_exp2RK(fs, e2);
  freeexp(fs, e2);
  freeexp(fs, e1);
  if (cond == 0 && op != OP_EQ) {
    int temp;  /* exchange args to replace by `<' or `<=' */
    temp = o1; o1 = o2; o2 = temp;  /* o1 <==> o2 */
    cond = 1;
  }
  e1->u.info = condjump(fs, op, cond, o1, o2);
  e1->k = VJMP;
}

References cond(), condjump(), freeexp(), expdesc::info, expdesc::k, luaK_exp2RK(), OP_EQ, expdesc::u, and VJMP.

Referenced by luaK_posfix().

codeextraarg()

static int codeextraarg ( FuncState * fs, int a )

static

Definition at line 244 of file lua-5.2.4/src/lcode.c.

                                               {
  lua_assert(a <= MAXARG_Ax);
  return luaK_code(fs, CREATE_Ax(OP_EXTRAARG, a));
}

References CREATE_Ax, lua_assert, luaK_code(), MAXARG_Ax, and OP_EXTRAARG.

Referenced by luaK_codek(), and luaK_setlist().

codenot()

static void codenot ( FuncState * fs, expdesc * e )

static

Definition at line 668 of file lua-5.2.4/src/lcode.c.

                                                {
  luaK_dischargevars(fs, e);
  switch (e->k) {
    case VNIL: case VFALSE: {
      e->k = VTRUE;
      break;
    }
    case VK: case VKNUM: case VTRUE: {
      e->k = VFALSE;
      break;
    }
    case VJMP: {
      invertjump(fs, e);
      break;
    }
    case VRELOCABLE:
    case VNONRELOC: {
      discharge2anyreg(fs, e);
      freeexp(fs, e);
      e->u.info = luaK_codeABC(fs, OP_NOT, 0, e->u.info, 0);
      e->k = VRELOCABLE;
      break;
    }
    default: {
      lua_assert(0);  /* cannot happen */
      break;
    }
  }
  /* interchange true and false lists */
  { int temp = e->f; e->f = e->t; e->t = temp; }
  removevalues(fs, e->f);
  removevalues(fs, e->t);
}

References discharge2anyreg(), expdesc::f, freeexp(), expdesc::info, invertjump(), expdesc::k, lua_assert, luaK_codeABC, luaK_dischargevars(), OP_NOT, removevalues(), expdesc::t, expdesc::u, VFALSE, VJMP, VK, VKNUM, VNIL, VNONRELOC, VRELOCABLE, and VTRUE.

Referenced by luaK_prefix().

condjump()

static int condjump ( FuncState * fs, OpCode op, int A, int B, int C )

static

Definition at line 74 of file lua-5.2.4/src/lcode.c.

                                                                    {
  luaK_codeABC(fs, op, A, B, C);
  return luaK_jump(fs);
}

References luaK_codeABC, and luaK_jump().

Referenced by codecomp(), and jumponcond().

constfolding()

static int constfolding ( OpCode op, expdesc * e1, expdesc * e2 )

static

Definition at line 713 of file lua-5.2.4/src/lcode.c.

                                                              {
  lua_Number r;
  if (!isnumeral(e1) || !isnumeral(e2)) return 0;
  if ((op == OP_DIV || op == OP_MOD) && e2->u.nval == 0)
    return 0;  /* do not attempt to divide by 0 */
  r = luaO_arith(op - OP_ADD + LUA_OPADD, e1->u.nval, e2->u.nval);
  e1->u.nval = r;
  return 1;
}

References isnumeral(), LUA_OPADD, luaO_arith(), expdesc::nval, OP_ADD, OP_DIV, OP_MOD, and expdesc::u.

Referenced by codearith().

discharge2anyreg()

static void discharge2anyreg ( FuncState * fs, expdesc * e )

static

Definition at line 460 of file lua-5.2.4/src/lcode.c.

                                                         {
  if (e->k != VNONRELOC) {
    luaK_reserveregs(fs, 1);
    discharge2reg(fs, e, fs->freereg-1);
  }
}

References discharge2reg(), FuncState::freereg, expdesc::k, luaK_reserveregs(), and VNONRELOC.

Referenced by codenot(), and jumponcond().

discharge2reg()

static void discharge2reg ( FuncState * fs, expdesc * e, int reg )

static

Definition at line 421 of file lua-5.2.4/src/lcode.c.

                                                               {
  luaK_dischargevars(fs, e);
  switch (e->k) {
    case VNIL: {
      luaK_nil(fs, reg, 1);
      break;
    }
    case VFALSE: case VTRUE: {
      luaK_codeABC(fs, OP_LOADBOOL, reg, e->k == VTRUE, 0);
      break;
    }
    case VK: {
      luaK_codek(fs, reg, e->u.info);
      break;
    }
    case VKNUM: {
      luaK_codek(fs, reg, luaK_numberK(fs, e->u.nval));
      break;
    }
    case VRELOCABLE: {
      Instruction *pc = &getcode(fs, e);
      SETARG_A(*pc, reg);
      break;
    }
    case VNONRELOC: {
      if (reg != e->u.info)
        luaK_codeABC(fs, OP_MOVE, reg, e->u.info, 0);
      break;
    }
    default: {
      lua_assert(e->k == VVOID || e->k == VJMP);
      return;  /* nothing to do... */
    }
  }
  e->u.info = reg;
  e->k = VNONRELOC;
}

References getcode, expdesc::info, expdesc::k, lua_assert, luaK_codeABC, luaK_codek(), luaK_dischargevars(), luaK_nil(), luaK_numberK(), expdesc::nval, OP_LOADBOOL, OP_MOVE, SETARG_A, expdesc::u, VFALSE, VJMP, VK, VKNUM, VNIL, VNONRELOC, VRELOCABLE, VTRUE, and VVOID.

Referenced by discharge2anyreg(), and exp2reg().

dischargejpc()

static void dischargejpc ( FuncState * fs )

static

Definition at line 163 of file lua-5.2.4/src/lcode.c.

                                         {
  patchlistaux(fs, fs->jpc, fs->pc, NO_REG, fs->pc);
  fs->jpc = NO_JUMP;
}

References FuncState::jpc, NO_JUMP, NO_REG, patchlistaux(), and FuncState::pc.

Referenced by luaK_code().

exp2reg()

static void exp2reg ( FuncState * fs, expdesc * e, int reg )

static

Definition at line 468 of file lua-5.2.4/src/lcode.c.

                                                         {
  discharge2reg(fs, e, reg);
  if (e->k == VJMP)
    luaK_concat(fs, &e->t, e->u.info);  /* put this jump in `t' list */
  if (hasjumps(e)) {
    int final;  /* position after whole expression */
    int p_f = NO_JUMP;  /* position of an eventual LOAD false */
    int p_t = NO_JUMP;  /* position of an eventual LOAD true */
    if (need_value(fs, e->t) || need_value(fs, e->f)) {
      int fj = (e->k == VJMP) ? NO_JUMP : luaK_jump(fs);
      p_f = code_label(fs, reg, 0, 1);
      p_t = code_label(fs, reg, 1, 0);
      luaK_patchtohere(fs, fj);
    }
    final = luaK_getlabel(fs);
    patchlistaux(fs, e->f, final, reg, p_f);
    patchlistaux(fs, e->t, final, reg, p_t);
  }
  e->f = e->t = NO_JUMP;
  e->u.info = reg;
  e->k = VNONRELOC;
}

References code_label(), discharge2reg(), expdesc::f, hasjumps, expdesc::info, expdesc::k, luaK_concat(), luaK_getlabel(), luaK_jump(), luaK_patchtohere(), need_value(), NO_JUMP, patchlistaux(), expdesc::t, expdesc::u, VJMP, and VNONRELOC.

Referenced by luaK_exp2anyreg(), luaK_exp2nextreg(), and luaK_storevar().

fixjump()

static void fixjump ( FuncState * fs, int pc, int dest )

static

Definition at line 80 of file lua-5.2.4/src/lcode.c.

                                                      {
  Instruction *jmp = &fs->f->code[pc];
  int offset = dest-(pc+1);
  lua_assert(dest != NO_JUMP);
  if (abs(offset) > MAXARG_sBx)
    luaX_syntaxerror(fs->ls, "control structure too long");
  SETARG_sBx(*jmp, offset);
}

References Proto::code, FuncState::f, FuncState::ls, lua_assert, luaX_syntaxerror(), MAXARG_sBx, NO_JUMP, and SETARG_sBx.

Referenced by luaK_concat(), and patchlistaux().

freeexp()

static void freeexp ( FuncState * fs, expdesc * e )

static

Definition at line 285 of file lua-5.2.4/src/lcode.c.

                                                {
  if (e->k == VNONRELOC)
    freereg(fs, e->u.info);
}

References freereg(), expdesc::info, expdesc::k, expdesc::u, and VNONRELOC.

Referenced by codearith(), codecomp(), codenot(), jumponcond(), luaK_exp2nextreg(), luaK_posfix(), luaK_self(), and luaK_storevar().

freereg()

static void freereg ( FuncState * fs, int reg )

static

Definition at line 277 of file lua-5.2.4/src/lcode.c.

                                             {
  if (!ISK(reg) && reg >= fs->nactvar) {
    fs->freereg--;
    lua_assert(reg == fs->freereg);
  }
}

References FuncState::freereg, ISK, lua_assert, and FuncState::nactvar.

Referenced by freeexp(), and luaK_dischargevars().

getjump()

static int getjump ( FuncState * fs, int pc )

static

Definition at line 100 of file lua-5.2.4/src/lcode.c.

                                           {
  int offset = GETARG_sBx(fs->f->code[pc]);
  if (offset == NO_JUMP)  /* point to itself represents end of list */
    return NO_JUMP;  /* end of list */
  else
    return (pc+1)+offset;  /* turn offset into absolute position */
}

References Proto::code, FuncState::f, GETARG_sBx, and NO_JUMP.

Referenced by luaK_concat(), luaK_patchclose(), need_value(), patchlistaux(), and removevalues().

getjumpcontrol()

static Instruction * getjumpcontrol ( FuncState * fs, int pc )

static

Definition at line 109 of file lua-5.2.4/src/lcode.c.

                                                           {
  Instruction *pi = &fs->f->code[pc];
  if (pc >= 1 && testTMode(GET_OPCODE(*(pi-1))))
    return pi-1;
  else
    return pi;
}

References Proto::code, FuncState::f, GET_OPCODE, and testTMode.

Referenced by invertjump(), need_value(), and patchtestreg().

invertjump()

static void invertjump ( FuncState * fs, expdesc * e )

static

Definition at line 598 of file lua-5.2.4/src/lcode.c.

                                                   {
  Instruction *pc = getjumpcontrol(fs, e->u.info);
  lua_assert(testTMode(GET_OPCODE(*pc)) && GET_OPCODE(*pc) != OP_TESTSET &&
                                           GET_OPCODE(*pc) != OP_TEST);
  SETARG_A(*pc, !(GETARG_A(*pc)));
}

References GET_OPCODE, GETARG_A, getjumpcontrol(), expdesc::info, lua_assert, OP_TEST, OP_TESTSET, SETARG_A, testTMode, and expdesc::u.

Referenced by codenot(), and luaK_goiftrue().

isnumeral()

static int isnumeral ( expdesc * e )

static

Definition at line 32 of file lua-5.2.4/src/lcode.c.

                                 {
  return (e->k == VKNUM && e->t == NO_JUMP && e->f == NO_JUMP);
}

References expdesc::f, expdesc::k, NO_JUMP, expdesc::t, and VKNUM.

Referenced by constfolding(), luaK_infix(), and luaK_prefix().

jumponcond()

static int jumponcond ( FuncState * fs, expdesc * e, int cond )

static

Definition at line 606 of file lua-5.2.4/src/lcode.c.

                                                            {
  if (e->k == VRELOCABLE) {
    Instruction ie = getcode(fs, e);
    if (GET_OPCODE(ie) == OP_NOT) {
      fs->pc--;  /* remove previous OP_NOT */
      return condjump(fs, OP_TEST, GETARG_B(ie), 0, !cond);
    }
    /* else go through */
  }
  discharge2anyreg(fs, e);
  freeexp(fs, e);
  return condjump(fs, OP_TESTSET, NO_REG, e->u.info, cond);
}

References cond(), condjump(), discharge2anyreg(), freeexp(), GET_OPCODE, GETARG_B, getcode, expdesc::info, expdesc::k, NO_REG, OP_NOT, OP_TEST, OP_TESTSET, FuncState::pc, expdesc::u, and VRELOCABLE.

Referenced by luaK_goiffalse(), and luaK_goiftrue().

luaK_checkstack()

void luaK_checkstack	(	FuncState *	fs,
		int	n )

Definition at line 261 of file lua-5.2.4/src/lcode.c.

                                            {
  int newstack = fs->freereg + n;
  if (newstack > fs->f->maxstacksize) {
    if (newstack >= MAXSTACK)
      luaX_syntaxerror(fs->ls, "function or expression too complex");
    fs->f->maxstacksize = cast_byte(newstack);
  }
}

References cast_byte, FuncState::f, FuncState::freereg, FuncState::ls, luaX_syntaxerror(), MAXSTACK, and Proto::maxstacksize.

Referenced by luaK_reserveregs().

luaK_code()

static int luaK_code ( FuncState * fs, Instruction i )

static

Definition at line 212 of file lua-5.2.4/src/lcode.c.

                                                    {
  Proto *f = fs->f;
  dischargejpc(fs);  /* `pc' will change */
  /* put new instruction in code array */
  luaM_growvector(fs->ls->L, f->code, fs->pc, f->sizecode, Instruction,
                  MAX_INT, "opcodes");
  f->code[fs->pc] = i;
  /* save corresponding line information */
  luaM_growvector(fs->ls->L, f->lineinfo, fs->pc, f->sizelineinfo, int,
                  MAX_INT, "opcodes");
  f->lineinfo[fs->pc] = fs->ls->lastline;
  return fs->pc++;
}

References Proto::code, dischargejpc(), FuncState::f, LexState::L, LexState::lastline, Proto::lineinfo, FuncState::ls, luaM_growvector, MAX_INT, FuncState::pc, Proto::sizecode, and Proto::sizelineinfo.

Referenced by codeextraarg(), luaK_codeABC(), and luaK_codeABx().

luaK_codeABC()

int luaK_codeABC	(	FuncState *	fs,
		OpCode	o,
		int	a,
		int	b,
		int	c )

Definition at line 227 of file lua-5.2.4/src/lcode.c.

                                                                {
  lua_assert(getOpMode(o) == iABC);
  lua_assert(getBMode(o) != OpArgN || b == 0);
  lua_assert(getCMode(o) != OpArgN || c == 0);
  lua_assert(a <= MAXARG_A && b <= MAXARG_B && c <= MAXARG_C);
  return luaK_code(fs, CREATE_ABC(o, a, b, c));
}

References CREATE_ABC, getBMode, getCMode, getOpMode, iABC, lua_assert, luaK_code(), MAXARG_A, MAXARG_B, MAXARG_C, and OpArgN.

luaK_codeABx()

int luaK_codeABx	(	FuncState *	fs,
		OpCode	o,
		int	a,
		unsigned int	bc )

Definition at line 236 of file lua-5.2.4/src/lcode.c.

                                                                   {
  lua_assert(getOpMode(o) == iABx || getOpMode(o) == iAsBx);
  lua_assert(getCMode(o) == OpArgN);
  lua_assert(a <= MAXARG_A && bc <= MAXARG_Bx);
  return luaK_code(fs, CREATE_ABx(o, a, bc));
}

References CREATE_ABx, getCMode, getOpMode, iABx, iAsBx, lua_assert, luaK_code(), MAXARG_A, MAXARG_Bx, and OpArgN.

Referenced by luaK_codek().

luaK_codek()

int luaK_codek	(	FuncState *	fs,
		int	reg,
		int	k )

Definition at line 250 of file lua-5.2.4/src/lcode.c.

                                               {
  if (k <= MAXARG_Bx)
    return luaK_codeABx(fs, OP_LOADK, reg, k);
  else {
    int p = luaK_codeABx(fs, OP_LOADKX, reg, 0);
    codeextraarg(fs, k);
    return p;
  }
}

References codeextraarg(), luaK_codeABx(), MAXARG_Bx, OP_LOADK, and OP_LOADKX.

Referenced by discharge2reg(), fornum(), and fornum().

luaK_concat()

void luaK_concat	(	FuncState *	fs,
		int *	l1,
		int	l2 )

Definition at line 198 of file lua-5.2.4/src/lcode.c.

                                                  {
  if (l2 == NO_JUMP) return;
  else if (*l1 == NO_JUMP)
    *l1 = l2;
  else {
    int list = *l1;
    int next;
    while ((next = getjump(fs, list)) != NO_JUMP)  /* find last element */
      list = next;
    fixjump(fs, list, l2);
  }
}

References fixjump(), getjump(), next, and NO_JUMP.

Referenced by exp2reg(), luaK_goiffalse(), luaK_goiftrue(), luaK_jump(), luaK_patchtohere(), and luaK_posfix().

luaK_dischargevars()

void luaK_dischargevars	(	FuncState *	fs,
		expdesc *	e )

Definition at line 383 of file lua-5.2.4/src/lcode.c.

                                                    {
  switch (e->k) {
    case VLOCAL: {
      e->k = VNONRELOC;
      break;
    }
    case VUPVAL: {
      e->u.info = luaK_codeABC(fs, OP_GETUPVAL, 0, e->u.info, 0);
      e->k = VRELOCABLE;
      break;
    }
    case VINDEXED: {
      OpCode op = OP_GETTABUP;  /* assume 't' is in an upvalue */
      freereg(fs, e->u.ind.idx);
      if (e->u.ind.vt == VLOCAL) {  /* 't' is in a register? */
        freereg(fs, e->u.ind.t);
        op = OP_GETTABLE;
      }
      e->u.info = luaK_codeABC(fs, op, 0, e->u.ind.t, e->u.ind.idx);
      e->k = VRELOCABLE;
      break;
    }
    case VVARARG:
    case VCALL: {
      luaK_setoneret(fs, e);
      break;
    }
    default: break;  /* there is one value available (somewhere) */
  }
}

References freereg(), expdesc::idx, expdesc::ind, expdesc::info, expdesc::k, luaK_codeABC, luaK_setoneret(), OP_GETTABLE, OP_GETTABUP, OP_GETUPVAL, expdesc::t, expdesc::u, VCALL, VINDEXED, VLOCAL, VNONRELOC, VRELOCABLE, expdesc::vt, VUPVAL, and VVARARG.

Referenced by codenot(), discharge2reg(), luaK_exp2anyreg(), luaK_exp2nextreg(), luaK_exp2val(), luaK_goiffalse(), luaK_goiftrue(), and luaK_posfix().

luaK_exp2anyreg()

int luaK_exp2anyreg	(	FuncState *	fs,
		expdesc *	e )

Definition at line 500 of file lua-5.2.4/src/lcode.c.

                                                {
  luaK_dischargevars(fs, e);
  if (e->k == VNONRELOC) {
    if (!hasjumps(e)) return e->u.info;  /* exp is already in a register */
    if (e->u.info >= fs->nactvar) {  /* reg. is not a local? */
      exp2reg(fs, e, e->u.info);  /* put value on it */
      return e->u.info;
    }
  }
  luaK_exp2nextreg(fs, e);  /* default */
  return e->u.info;
}

References exp2reg(), hasjumps, expdesc::info, expdesc::k, luaK_dischargevars(), luaK_exp2nextreg(), FuncState::nactvar, expdesc::u, and VNONRELOC.

Referenced by luaK_exp2anyregup(), luaK_exp2RK(), luaK_exp2val(), luaK_prefix(), luaK_self(), and luaK_storevar().

luaK_exp2anyregup()

void luaK_exp2anyregup	(	FuncState *	fs,
		expdesc *	e )

Definition at line 514 of file lua-5.2.4/src/lcode.c.

                                                   {
  if (e->k != VUPVAL || hasjumps(e))
    luaK_exp2anyreg(fs, e);
}

References hasjumps, expdesc::k, luaK_exp2anyreg(), and VUPVAL.

Referenced by fieldsel(), fieldsel(), fieldsel(), suffixedexp(), suffixedexp(), and suffixedexp().

luaK_exp2nextreg()

void luaK_exp2nextreg	(	FuncState *	fs,
		expdesc *	e )

Definition at line 492 of file lua-5.2.4/src/lcode.c.

                                                  {
  luaK_dischargevars(fs, e);
  freeexp(fs, e);
  luaK_reserveregs(fs, 1);
  exp2reg(fs, e, fs->freereg - 1);
}

References exp2reg(), freeexp(), FuncState::freereg, luaK_dischargevars(), and luaK_reserveregs().

Referenced by luaK_exp2anyreg(), luaK_infix(), and luaK_posfix().

luaK_exp2RK()

int luaK_exp2RK	(	FuncState *	fs,
		expdesc *	e )

Definition at line 528 of file lua-5.2.4/src/lcode.c.

                                            {
  luaK_exp2val(fs, e);
  switch (e->k) {
    case VTRUE:
    case VFALSE:
    case VNIL: {
      if (fs->nk <= MAXINDEXRK) {  /* constant fits in RK operand? */
        e->u.info = (e->k == VNIL) ? nilK(fs) : boolK(fs, (e->k == VTRUE));
        e->k = VK;
        return RKASK(e->u.info);
      }
      else break;
    }
    case VKNUM: {
      e->u.info = luaK_numberK(fs, e->u.nval);
      e->k = VK;
      /* go through */
    }
    case VK: {
      if (e->u.info <= MAXINDEXRK)  /* constant fits in argC? */
        return RKASK(e->u.info);
      else break;
    }
    default: break;
  }
  /* not a constant in the right range: put it in a register */
  return luaK_exp2anyreg(fs, e);
}

References boolK(), expdesc::info, expdesc::k, luaK_exp2anyreg(), luaK_exp2val(), luaK_numberK(), MAXINDEXRK, nilK(), FuncState::nk, expdesc::nval, RKASK, expdesc::u, VFALSE, VK, VKNUM, VNIL, and VTRUE.

Referenced by codearith(), codecomp(), luaK_indexed(), luaK_infix(), luaK_self(), and luaK_storevar().

luaK_exp2val()

void luaK_exp2val	(	FuncState *	fs,
		expdesc *	e )

Definition at line 520 of file lua-5.2.4/src/lcode.c.

                                              {
  if (hasjumps(e))
    luaK_exp2anyreg(fs, e);
  else
    luaK_dischargevars(fs, e);
}

References hasjumps, luaK_dischargevars(), and luaK_exp2anyreg().

Referenced by luaK_exp2RK(), and luaK_posfix().

luaK_fixline()

void luaK_fixline	(	FuncState *	fs,
		int	line )

Definition at line 862 of file lua-5.2.4/src/lcode.c.

                                            {
  fs->f->lineinfo[fs->pc - 1] = line;
}

References FuncState::f, Proto::lineinfo, and FuncState::pc.

Referenced by codearith().

luaK_getlabel()

int luaK_getlabel

(

FuncState *

fs

)

Definition at line 94 of file lua-5.2.4/src/lcode.c.

                                  {
  fs->lasttarget = fs->pc;
  return fs->pc;
}

References FuncState::lasttarget, and FuncState::pc.

Referenced by code_label(), exp2reg(), and luaK_patchtohere().

luaK_goiffalse()

void luaK_goiffalse	(	FuncState *	fs,
		expdesc *	e )

Definition at line 645 of file lua-5.2.4/src/lcode.c.

                                                {
  int pc;  /* pc of last jump */
  luaK_dischargevars(fs, e);
  switch (e->k) {
    case VJMP: {
      pc = e->u.info;
      break;
    }
    case VNIL: case VFALSE: {
      pc = NO_JUMP;  /* always false; do nothing */
      break;
    }
    default: {
      pc = jumponcond(fs, e, 1);
      break;
    }
  }
  luaK_concat(fs, &e->t, pc);  /* insert last jump in `t' list */
  luaK_patchtohere(fs, e->f);
  e->f = NO_JUMP;
}

References expdesc::f, expdesc::info, jumponcond(), expdesc::k, luaK_concat(), luaK_dischargevars(), luaK_patchtohere(), NO_JUMP, expdesc::t, expdesc::u, VFALSE, VJMP, and VNIL.

Referenced by luaK_infix().

luaK_goiftrue()

void luaK_goiftrue	(	FuncState *	fs,
		expdesc *	e )

Definition at line 621 of file lua-5.2.4/src/lcode.c.

                                               {
  int pc;  /* pc of last jump */
  luaK_dischargevars(fs, e);
  switch (e->k) {
    case VJMP: {
      invertjump(fs, e);
      pc = e->u.info;
      break;
    }
    case VK: case VKNUM: case VTRUE: {
      pc = NO_JUMP;  /* always true; do nothing */
      break;
    }
    default: {
      pc = jumponcond(fs, e, 0);
      break;
    }
  }
  luaK_concat(fs, &e->f, pc);  /* insert last jump in `f' list */
  luaK_patchtohere(fs, e->t);
  e->t = NO_JUMP;
}

References expdesc::f, expdesc::info, invertjump(), jumponcond(), expdesc::k, luaK_concat(), luaK_dischargevars(), luaK_patchtohere(), NO_JUMP, expdesc::t, expdesc::u, VJMP, VK, VKNUM, and VTRUE.

Referenced by luaK_infix().

luaK_indexed()

void luaK_indexed	(	FuncState *	fs,
		expdesc *	t,
		expdesc *	k )

Definition at line 703 of file lua-5.2.4/src/lcode.c.

                                                          {
  lua_assert(!hasjumps(t));
  t->u.ind.t = t->u.info;
  t->u.ind.idx = luaK_exp2RK(fs, k);
  t->u.ind.vt = (t->k == VUPVAL) ? VUPVAL
                                 : check_exp(vkisinreg(t->k), VLOCAL);
  t->k = VINDEXED;
}

References check_exp, hasjumps, expdesc::idx, expdesc::ind, expdesc::info, expdesc::k, lua_assert, luaK_exp2RK(), expdesc::t, expdesc::u, VINDEXED, vkisinreg, VLOCAL, expdesc::vt, and VUPVAL.

luaK_infix()

void luaK_infix	(	FuncState *	fs,
		BinOpr	op,
		expdesc *	v )

Definition at line 786 of file lua-5.2.4/src/lcode.c.

                                                       {
  switch (op) {
    case OPR_AND: {
      luaK_goiftrue(fs, v);
      break;
    }
    case OPR_OR: {
      luaK_goiffalse(fs, v);
      break;
    }
    case OPR_CONCAT: {
      luaK_exp2nextreg(fs, v);  /* operand must be on the `stack' */
      break;
    }
    case OPR_ADD: case OPR_SUB: case OPR_MUL: case OPR_DIV:
    case OPR_MOD: case OPR_POW: {
      if (!isnumeral(v)) luaK_exp2RK(fs, v);
      break;
    }
    default: {
      luaK_exp2RK(fs, v);
      break;
    }
  }
}

References isnumeral(), luaK_exp2nextreg(), luaK_exp2RK(), luaK_goiffalse(), luaK_goiftrue(), OPR_ADD, OPR_AND, OPR_CONCAT, OPR_DIV, OPR_MOD, OPR_MUL, OPR_OR, OPR_POW, and OPR_SUB.

luaK_jump()

int luaK_jump

(

FuncState *

fs

)

Definition at line 59 of file lua-5.2.4/src/lcode.c.

                              {
  int jpc = fs->jpc;  /* save list of jumps to here */
  int j;
  fs->jpc = NO_JUMP;
  j = luaK_codeAsBx(fs, OP_JMP, 0, NO_JUMP);
  luaK_concat(fs, &j, jpc);  /* keep them on hold */
  return j;
}

References FuncState::jpc, luaK_codeAsBx, luaK_concat(), NO_JUMP, and OP_JMP.

Referenced by condjump(), and exp2reg().

luaK_nil()

void luaK_nil	(	FuncState *	fs,
		int	from,
		int	n )

Definition at line 37 of file lua-5.2.4/src/lcode.c.

                                               {
  Instruction *previous;
  int l = from + n - 1;  /* last register to set nil */
  if (fs->pc > fs->lasttarget) {  /* no jumps to current position? */
    previous = &fs->f->code[fs->pc-1];
    if (GET_OPCODE(*previous) == OP_LOADNIL) {
      int pfrom = GETARG_A(*previous);
      int pl = pfrom + GETARG_B(*previous);
      if ((pfrom <= from && from <= pl + 1) ||
          (from <= pfrom && pfrom <= l + 1)) {  /* can connect both? */
        if (pfrom < from) from = pfrom;  /* from = min(from, pfrom) */
        if (pl > l) l = pl;  /* l = max(l, pl) */
        SETARG_A(*previous, from);
        SETARG_B(*previous, l - from);
        return;
      }
    }  /* else go through */
  }
  luaK_codeABC(fs, OP_LOADNIL, from, n - 1, 0);  /* else no optimization */
}

References Proto::code, FuncState::f, GET_OPCODE, GETARG_A, GETARG_B, FuncState::lasttarget, luaK_codeABC, OP_LOADNIL, FuncState::pc, SETARG_A, and SETARG_B.

Referenced by discharge2reg().

luaK_numberK()

int luaK_numberK	(	FuncState *	fs,
		lua_Number	r )

Definition at line 326 of file lua-5.2.4/src/lcode.c.

                                               {
  int n;
  lua_State *L = fs->ls->L;
  TValue o;
  setnvalue(&o, r);
  if (r == 0 || luai_numisnan(NULL, r)) {  /* handle -0 and NaN */
    /* use raw representation as key to avoid numeric problems */
    setsvalue(L, L->top++, luaS_newlstr(L, (char *)&r, sizeof(r)));
    n = addk(fs, L->top - 1, &o);
    L->top--;
  }
  else
    n = addk(fs, &o, &o);  /* regular case */
  return n;
}

References addk(), LexState::L, FuncState::ls, luai_numisnan, luaS_newlstr(), NULL, setnvalue, setsvalue, and lua_State::top.

Referenced by discharge2reg(), and luaK_exp2RK().

luaK_patchclose()

LUAI_FUNC void luaK_patchclose	(	FuncState *	fs,
		int	list,
		int	level )

Definition at line 179 of file lua-5.2.4/src/lcode.c.

                                                                    {
  level++;  /* argument is +1 to reserve 0 as non-op */
  while (list != NO_JUMP) {
    int next = getjump(fs, list);
    lua_assert(GET_OPCODE(fs->f->code[list]) == OP_JMP &&
                (GETARG_A(fs->f->code[list]) == 0 ||
                 GETARG_A(fs->f->code[list]) >= level));
    SETARG_A(fs->f->code[list], level);
    list = next;
  }
}

References Proto::code, FuncState::f, GET_OPCODE, GETARG_A, getjump(), lua_assert, next, NO_JUMP, OP_JMP, and SETARG_A.

Referenced by findlabel(), findlabel(), leaveblock(), leaveblock(), movegotosout(), movegotosout(), repeatstat(), and repeatstat().

luaK_patchlist()

void luaK_patchlist	(	FuncState *	fs,
		int	list,
		int	target )

Definition at line 169 of file lua-5.2.4/src/lcode.c.

                                                          {
  if (target == fs->pc)
    luaK_patchtohere(fs, list);
  else {
    lua_assert(target < fs->pc);
    patchlistaux(fs, list, target, NO_REG, target);
  }
}

References lua_assert, luaK_patchtohere(), NO_REG, patchlistaux(), and FuncState::pc.

luaK_patchtohere()

void luaK_patchtohere	(	FuncState *	fs,
		int	list )

Definition at line 192 of file lua-5.2.4/src/lcode.c.

                                                {
  luaK_getlabel(fs);
  luaK_concat(fs, &fs->jpc, list);
}

References FuncState::jpc, luaK_concat(), and luaK_getlabel().

Referenced by exp2reg(), luaK_goiffalse(), luaK_goiftrue(), and luaK_patchlist().

luaK_posfix()

void luaK_posfix	(	FuncState *	fs,
		BinOpr	op,
		expdesc *	e1,
		expdesc *	e2,
		int	line )

Definition at line 813 of file lua-5.2.4/src/lcode.c.

                                                      {
  switch (op) {
    case OPR_AND: {
      lua_assert(e1->t == NO_JUMP);  /* list must be closed */
      luaK_dischargevars(fs, e2);
      luaK_concat(fs, &e2->f, e1->f);
      *e1 = *e2;
      break;
    }
    case OPR_OR: {
      lua_assert(e1->f == NO_JUMP);  /* list must be closed */
      luaK_dischargevars(fs, e2);
      luaK_concat(fs, &e2->t, e1->t);
      *e1 = *e2;
      break;
    }
    case OPR_CONCAT: {
      luaK_exp2val(fs, e2);
      if (e2->k == VRELOCABLE && GET_OPCODE(getcode(fs, e2)) == OP_CONCAT) {
        lua_assert(e1->u.info == GETARG_B(getcode(fs, e2))-1);
        freeexp(fs, e1);
        SETARG_B(getcode(fs, e2), e1->u.info);
        e1->k = VRELOCABLE; e1->u.info = e2->u.info;
      }
      else {
        luaK_exp2nextreg(fs, e2);  /* operand must be on the 'stack' */
        codearith(fs, OP_CONCAT, e1, e2, line);
      }
      break;
    }
    case OPR_ADD: case OPR_SUB: case OPR_MUL: case OPR_DIV:
    case OPR_MOD: case OPR_POW: {
      codearith(fs, cast(OpCode, op - OPR_ADD + OP_ADD), e1, e2, line);
      break;
    }
    case OPR_EQ: case OPR_LT: case OPR_LE: {
      codecomp(fs, cast(OpCode, op - OPR_EQ + OP_EQ), 1, e1, e2);
      break;
    }
    case OPR_NE: case OPR_GT: case OPR_GE: {
      codecomp(fs, cast(OpCode, op - OPR_NE + OP_EQ), 0, e1, e2);
      break;
    }
    default: lua_assert(0);
  }
}

References cast, codearith(), codecomp(), expdesc::f, freeexp(), GET_OPCODE, GETARG_B, getcode, expdesc::info, expdesc::k, lua_assert, luaK_concat(), luaK_dischargevars(), luaK_exp2nextreg(), luaK_exp2val(), NO_JUMP, OP_ADD, OP_CONCAT, OP_EQ, OPR_ADD, OPR_AND, OPR_CONCAT, OPR_DIV, OPR_EQ, OPR_GE, OPR_GT, OPR_LE, OPR_LT, OPR_MOD, OPR_MUL, OPR_NE, OPR_OR, OPR_POW, OPR_SUB, SETARG_B, expdesc::t, expdesc::u, and VRELOCABLE.

luaK_prefix()

void luaK_prefix	(	FuncState *	fs,
		UnOpr	op,
		expdesc *	e,
		int	line )

Definition at line 762 of file lua-5.2.4/src/lcode.c.

                                                                 {
  expdesc e2;
  e2.t = e2.f = NO_JUMP; e2.k = VKNUM; e2.u.nval = 0;
  switch (op) {
    case OPR_MINUS: {
      if (isnumeral(e))  /* minus constant? */
        e->u.nval = luai_numunm(NULL, e->u.nval);  /* fold it */
      else {
        luaK_exp2anyreg(fs, e);
        codearith(fs, OP_UNM, e, &e2, line);
      }
      break;
    }
    case OPR_NOT: codenot(fs, e); break;
    case OPR_LEN: {
      luaK_exp2anyreg(fs, e);  /* cannot operate on constants */
      codearith(fs, OP_LEN, e, &e2, line);
      break;
    }
    default: lua_assert(0);
  }
}

References codearith(), codenot(), expdesc::f, isnumeral(), expdesc::k, lua_assert, luai_numunm, luaK_exp2anyreg(), NO_JUMP, NULL, expdesc::nval, OP_LEN, OP_UNM, OPR_LEN, OPR_MINUS, OPR_NOT, expdesc::t, expdesc::u, and VKNUM.

luaK_reserveregs()

void luaK_reserveregs	(	FuncState *	fs,
		int	n )

Definition at line 271 of file lua-5.2.4/src/lcode.c.

                                             {
  luaK_checkstack(fs, n);
  fs->freereg += n;
}

References FuncState::freereg, and luaK_checkstack().

Referenced by discharge2anyreg(), luaK_exp2nextreg(), luaK_self(), and luaK_setreturns().

luaK_ret()

void luaK_ret	(	FuncState *	fs,
		int	first,
		int	nret )

Definition at line 69 of file lua-5.2.4/src/lcode.c.

                                                   {
  luaK_codeABC(fs, OP_RETURN, first, nret+1, 0);
}

References luaK_codeABC, and OP_RETURN.

luaK_self()

void luaK_self	(	FuncState *	fs,
		expdesc *	e,
		expdesc *	key )

Definition at line 585 of file lua-5.2.4/src/lcode.c.

                                                         {
  int ereg;
  luaK_exp2anyreg(fs, e);
  ereg = e->u.info;  /* register where 'e' was placed */
  freeexp(fs, e);
  e->u.info = fs->freereg;  /* base register for op_self */
  e->k = VNONRELOC;
  luaK_reserveregs(fs, 2);  /* function and 'self' produced by op_self */
  luaK_codeABC(fs, OP_SELF, e->u.info, ereg, luaK_exp2RK(fs, key));
  freeexp(fs, key);
}

References freeexp(), FuncState::freereg, expdesc::info, expdesc::k, luaK_codeABC, luaK_exp2anyreg(), luaK_exp2RK(), luaK_reserveregs(), OP_SELF, expdesc::u, and VNONRELOC.

luaK_setlist()

void luaK_setlist	(	FuncState *	fs,
		int	base,
		int	nelems,
		int	tostore )

Definition at line 867 of file lua-5.2.4/src/lcode.c.

                                                                     {
  int c =  (nelems - 1)/LFIELDS_PER_FLUSH + 1;
  int b = (tostore == LUA_MULTRET) ? 0 : tostore;
  lua_assert(tostore != 0);
  if (c <= MAXARG_C)
    luaK_codeABC(fs, OP_SETLIST, base, b, c);
  else if (c <= MAXARG_Ax) {
    luaK_codeABC(fs, OP_SETLIST, base, b, 0);
    codeextraarg(fs, c);
  }
  else
    luaX_syntaxerror(fs->ls, "constructor too long");
  fs->freereg = base + 1;  /* free registers with list values */
}

References codeextraarg(), FuncState::freereg, LFIELDS_PER_FLUSH, FuncState::ls, lua_assert, LUA_MULTRET, luaK_codeABC, luaX_syntaxerror(), MAXARG_Ax, MAXARG_C, and OP_SETLIST.

luaK_setoneret()

void luaK_setoneret	(	FuncState *	fs,
		expdesc *	e )

Definition at line 371 of file lua-5.2.4/src/lcode.c.

                                                {
  if (e->k == VCALL) {  /* expression is an open function call? */
    e->k = VNONRELOC;
    e->u.info = GETARG_A(getcode(fs, e));
  }
  else if (e->k == VVARARG) {
    SETARG_B(getcode(fs, e), 2);
    e->k = VRELOCABLE;  /* can relocate its simple result */
  }
}

References GETARG_A, getcode, expdesc::info, expdesc::k, SETARG_B, expdesc::u, VCALL, VNONRELOC, VRELOCABLE, and VVARARG.

Referenced by luaK_dischargevars().

luaK_setreturns()

void luaK_setreturns	(	FuncState *	fs,
		expdesc *	e,
		int	nresults )

Definition at line 359 of file lua-5.2.4/src/lcode.c.

                                                               {
  if (e->k == VCALL) {  /* expression is an open function call? */
    SETARG_C(getcode(fs, e), nresults+1);
  }
  else if (e->k == VVARARG) {
    SETARG_B(getcode(fs, e), nresults+1);
    SETARG_A(getcode(fs, e), fs->freereg);
    luaK_reserveregs(fs, 1);
  }
}

References FuncState::freereg, getcode, expdesc::k, luaK_reserveregs(), SETARG_A, SETARG_B, SETARG_C, VCALL, and VVARARG.

luaK_storevar()

void luaK_storevar	(	FuncState *	fs,
		expdesc *	var,
		expdesc *	ex )

Definition at line 558 of file lua-5.2.4/src/lcode.c.

                                                              {
  switch (var->k) {
    case VLOCAL: {
      freeexp(fs, ex);
      exp2reg(fs, ex, var->u.info);
      return;
    }
    case VUPVAL: {
      int e = luaK_exp2anyreg(fs, ex);
      luaK_codeABC(fs, OP_SETUPVAL, e, var->u.info, 0);
      break;
    }
    case VINDEXED: {
      OpCode op = (var->u.ind.vt == VLOCAL) ? OP_SETTABLE : OP_SETTABUP;
      int e = luaK_exp2RK(fs, ex);
      luaK_codeABC(fs, op, var->u.ind.t, var->u.ind.idx, e);
      break;
    }
    default: {
      lua_assert(0);  /* invalid var kind to store */
      break;
    }
  }
  freeexp(fs, ex);
}

References exp2reg(), freeexp(), expdesc::idx, expdesc::ind, expdesc::info, expdesc::k, lua_assert, luaK_codeABC, luaK_exp2anyreg(), luaK_exp2RK(), OP_SETTABLE, OP_SETTABUP, OP_SETUPVAL, expdesc::t, expdesc::u, VINDEXED, VLOCAL, expdesc::vt, and VUPVAL.

luaK_stringK()

int luaK_stringK	(	FuncState *	fs,
		TString *	s )

Definition at line 319 of file lua-5.2.4/src/lcode.c.

                                             {
  TValue o;
  setsvalue(fs->ls->L, &o, s);
  return addk(fs, &o, &o);
}

References addk(), LexState::L, FuncState::ls, s, and setsvalue.

need_value()

static int need_value ( FuncState * fs, int list )

static

Definition at line 122 of file lua-5.2.4/src/lcode.c.

                                                {
  for (; list != NO_JUMP; list = getjump(fs, list)) {
    Instruction i = *getjumpcontrol(fs, list);
    if (GET_OPCODE(i) != OP_TESTSET) return 1;
  }
  return 0;  /* not found */
}

References GET_OPCODE, getjump(), getjumpcontrol(), NO_JUMP, and OP_TESTSET.

Referenced by exp2reg().

nilK()

static int nilK ( FuncState * fs )

static

Definition at line 350 of file lua-5.2.4/src/lcode.c.

                                {
  TValue k, v;
  setnilvalue(&v);
  /* cannot use nil as key; instead use table itself to represent nil */
  sethvalue(fs->ls->L, &k, fs->h);
  return addk(fs, &k, &v);
}

References addk(), FuncState::h, LexState::L, FuncState::ls, sethvalue, and setnilvalue.

Referenced by luaK_exp2RK().

patchlistaux()

static void patchlistaux ( FuncState * fs, int list, int vtarget, int reg, int dtarget )

static

Definition at line 150 of file lua-5.2.4/src/lcode.c.

                                       {
  while (list != NO_JUMP) {
    int next = getjump(fs, list);
    if (patchtestreg(fs, list, reg))
      fixjump(fs, list, vtarget);
    else
      fixjump(fs, list, dtarget);  /* jump to default target */
    list = next;
  }
}

References fixjump(), getjump(), next, NO_JUMP, and patchtestreg().

Referenced by dischargejpc(), exp2reg(), and luaK_patchlist().

patchtestreg()

static int patchtestreg ( FuncState * fs, int node, int reg )

static

Definition at line 131 of file lua-5.2.4/src/lcode.c.

                                                           {
  Instruction *i = getjumpcontrol(fs, node);
  if (GET_OPCODE(*i) != OP_TESTSET)
    return 0;  /* cannot patch other instructions */
  if (reg != NO_REG && reg != GETARG_B(*i))
    SETARG_A(*i, reg);
  else  /* no register to put value or register already has the value */
    *i = CREATE_ABC(OP_TEST, GETARG_B(*i), 0, GETARG_C(*i));
 
  return 1;
}

References CREATE_ABC, GET_OPCODE, GETARG_B, GETARG_C, getjumpcontrol(), NO_REG, OP_TEST, OP_TESTSET, and SETARG_A.

Referenced by patchlistaux(), and removevalues().

removevalues()

static void removevalues ( FuncState * fs, int list )

static

Definition at line 144 of file lua-5.2.4/src/lcode.c.

                                                   {
  for (; list != NO_JUMP; list = getjump(fs, list))
      patchtestreg(fs, list, NO_REG);
}

References getjump(), NO_JUMP, NO_REG, and patchtestreg().

Referenced by codenot().