On Mon, Nov 18, 2013 at 04:47:01PM +0100, Mischa Baars wrote:
>
> At least you have the example in case you need it, in my opinion the
> compiler is in error.
This isn't even gcc, you're just making noise. Try it with clang or read
the x86_64 ABI.
Surely it's common knowledge that if you're writing assembly, certain
registers are preserved across function calls? What about %ebp?
Compile this file, even on the lowest optimisation level (-O1) using
both gcc and clang, and you'll see that they're explicitly using %ebx to
save the value of `i'. It's not an accident.
int main(void)
{
int i = save_me();
f(g(), h());
return i;
}
Regards,
Rob
