When is stack space allocated for local variables?

Question

I have a question about the following C code:

void my_function()
{
    int i1;
    int j1;

    // Do something...

    if (check_something())
    {
                 


        

Answer 1

If the variables are going to be put on the stack, the stack space is allocated at the beginning of the function before the first statement in the function. The stack pointer will be moved up (or down) the total number of bytes to store all the local variables.