fix: the MLOAD opcode can modify memory

[Wodann]

This occurs if the MLOAD opcode needs to be resize the memory to read from the requested memory offset.

pub fn mload<WIRE: InterpreterTypes, H: ?Sized>(context: InstructionContext<'_, H, WIRE>) {
    popn_top!([], top, context.interpreter);
    let offset = as_usize_or_fail!(context.interpreter, top);
    resize_memory!(context.interpreter, offset, 32); // <-- This can modify the memory!!
    *top =
        U256::try_from_be_slice(context.interpreter.memory.slice_len(offset, 32).as_ref()).unwrap()
}

[codspeed-hq]

CodSpeed Performance Report

Merging #3266 will not alter performance

_{Comparing Wodann:fix/mload-modifies-memory (b830d0c) with main (2c1153b)}

Summary

✅ 173 untouched