C++ short-circuiting of booleans

Question

I\'m new to c++ and am curious how the compiler handles lazy evaluation of booleans. For example,

if(A == 1 || B == 2){...}

If A does equal

Answer 1

The compiler handles this by generating intermediate jumps. For the following code:

if(A == 1 || B == 2){...}

compiled to pseudo-assembler, might be:

    load variable A
    compare to constant 1
    if equal, jump to L1
    load variable B
    compare to constant 2
    if not equal, jump to L2
L1:
    ... (complete body of if statement)
L2:
    (code after if block goes here)