Function try_fold_binop

compiler/src/modules/vm/optimizer.rs:196–215

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

}

fn try_fold_binop(chunk: &mut SSAChunk, dead: &mut [bool], ip: usize) {
    let Some(prev1_ip) = prev_live(dead, ip) else { return };
    let Some(prev2_ip) = prev_live(dead, prev1_ip) else { return };

    let p2 = chunk.instructions[prev2_ip];
    let p1 = chunk.instructions[prev1_ip];
    if p2.opcode != OpCode::LoadConst || p1.opcode != OpCode::LoadConst { return; }

    let (Some(a), Some(b)) = (
        const_to_val(&chunk.constants, p2.operand),
        const_to_val(&chunk.constants, p1.operand),
    ) else { return };

    let opcode = chunk.instructions[ip].opcode;
    let Some(result) = fold_binop(opcode, a, b) else { return };

    if !write_const_load(chunk, prev2_ip, result) { return; }
    dead[prev1_ip] = true;
    dead[ip] = true;
}

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