evaluating builtin [] during initialization

[wkaras]

It seems like it would not be hard for the optimizer to generate the
same
object code from this source code:

int x[] = { 3, 6, 9 };
int y = x[1];

as it does from this source code:

int x[] = { 3, 6, 9 };
int y = 6;

But it tried two compilers, with optimization enabled, and both
generated
"pre-main" executable code to initialize y (when it's assinged from
x[1]).

Anyone seen a compiler that does optimize out builtin [] in
initializers?
Or, anyone know why it is hard/bad to optimize [] out?

[Frederick Gotham]

posted:

int x[] = { 3, 6, 9 };
int y = x[1];

Try:

int const x[] = { 3, 6, 9 };
And see if it makes a difference. (Or have you already tried that, and are
now experimenting with non-const arrays... ?)

--

Frederick Gotham