Function try_fold_not

compiler/src/modules/vm/optimizer.rs:217–240

(chunk: &mut SSAChunk, dead: &mut [bool], ip: usize)

}

fn try_fold_not(chunk: &mut SSAChunk, dead: &mut [bool], ip: usize) {
    let Some(prev1_ip) = prev_live(dead, ip) else { return };
    let p1 = chunk.instructions[prev1_ip];
    if p1.opcode != OpCode::LoadConst { return; }
    let Some(v) = const_to_val(&chunk.constants, p1.operand) else { return };

    let folded = if v.is_bool() {
        Some(Val::bool(!v.as_bool()))
    } else if v.is_int() {
        Some(Val::bool(v.as_int() == 0))
    } else if v.is_float() {
        Some(Val::bool(v.as_float() == 0.0))
    } else if v.is_none() {
        Some(Val::bool(true))
    } else {
        None
    };

    if let Some(r) = folded
        && write_const_load(chunk, prev1_ip, r)
    {
        dead[ip] = true;
    }
}

fn try_fold_neg(chunk: &mut SSAChunk, dead: &mut [bool], ip: usize) {
    let Some(prev1_ip) = prev_live(dead, ip) else { return };