Function discharge2anyreg

3rd/lua-5.4.3/src/lcode.c:862–867

** Ensure expression value is in a register, making 'e' a ** non-relocatable expression. ** (Expression still may have jump lists.) */

** (Expression still may have jump lists.)
*/
static void discharge2anyreg (FuncState *fs, expdesc *e) {
  if (e->k != VNONRELOC) {  /* no fixed register yet? */
    luaK_reserveregs(fs, 1);  /* get a register */
    discharge2reg(fs, e, fs->freereg-1);  /* put value there */
  }
}


static int code_loadbool (FuncState *fs, int A, OpCode op) {