Method read_op

crates/compiler-core/src/bytecode.rs:684–690

Atomically read the opcode at `index` with Acquire ordering. Pairs with `replace_op` (Release) to ensure cache data visibility.

(&self, index: usize)

    /// Atomically read the opcode at `index` with Acquire ordering.
    /// Pairs with `replace_op` (Release) to ensure cache data visibility.
    pub fn read_op(&self, index: usize) -> Instruction {
        let units = unsafe { &*self.units.get() };
        let ptr = units.as_ptr().wrapping_add(index) as *const AtomicU8;
        let byte = unsafe { &*ptr }.load(Ordering::Acquire);
        // SAFETY: Only valid Instruction values are stored via replace_op/compare_exchange_op.
        unsafe { mem::transmute::<u8, Instruction>(byte) }
    }

    /// Atomically read the arg byte at `index` with Relaxed ordering.
    pub fn read_arg(&self, index: usize) -> OpArgByte {