Rupert Wood wrote:
Nicola Musatti wrote:
_main PROC
; 12 : char * b = "0123456789"; ; 13 : for ( int l = 0; l < 1
<< 30; ++l ) ; 14 : f(b, l); ; 15 : }
xor eax, eax ret 0 _main ENDP
Note that it optimised away your whole program! It could blank out
f() because it never needed to call it.
That's true, although f() was still compiled to the equivalent of
'return 0;'.
This can be made more evident by changing f() to
#include <iostream>
int f(char *buf, int len) {
int res = 0;
len = 1 << 30;
if (buf + len < buf)
res = 1;
std::cout << res << '\n';
return res;
}
The resulting f() amounts to
std::cout << 0 << '\n';
return 0;
Which is still inlined into main().
Cheers,
Nicola
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