Function need_value

src/Chain/libraries/glua/lcode.cpp:139–145

** check whether list has any jump that do not produce a value ** (or produce an inverted value) */

** (or produce an inverted value)
*/
static int need_value(FuncState *fs, int list) {
    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 */
}


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