Compilare: user.cpp: In function ‘void CountingSort(unsigned int*, unsigned int*, unsigned int)’: user.cpp:17:73: warning: operation on ‘i’ may be undefined [-Wsequence-point] for(u32 i = 0x0; i != 0x800; index[++i] = index[~-i] + frequence[~-i]); ^ user.cpp:17:73: warning: operation on ‘i’ may be undefined [-Wsequence-point] user.cpp: In function ‘int main()’: user.cpp:47:56: warning: operation on ‘i’ may be undefined [-Wsequence-point] v[--i] = (u64(v[-~i]) * A + B) % 0x367C2DC9; ^ user.cpp:54:56: warning: operation on ‘i’ may be undefined [-Wsequence-point] v[--i] = (u64(v[-~i]) * A + B) % 0x7CE67EF6; ^ user.cpp:61:56: warning: operation on ‘i’ may be undefined [-Wsequence-point] v[--i] = (u64(v[-~i]) * A + B) % 0x6F6E4E7B; ^ user.cpp:68:53: warning: operation on ‘i’ may be undefined [-Wsequence-point] v[--i] = (u64(v[-~i]) * A + B) % 0xF4240; ^ user.cpp:75:53: warning: operation on ‘i’ may be undefined [-Wsequence-point] v[--i] = (u64(v[-~i]) * A + B) % 0x65759; ^ user.cpp:82:47: warning: operation on ‘i’ may be undefined [-Wsequence-point] v[--i] = (u64(v[-~i]) * A + B) % C; ^ user.cpp: At global scope: user.cpp:24:37: warning: always_inline function might not be inlinable [-Wattributes] __attribute__((always_inline)) void write(u32 x) ^ user.cpp:11:37: warning: always_inline function might not be inlinable [-Wattributes] __attribute__((always_inline)) void CountingSort(u32 A[], u32 B[], u32 digit) ^ user.cpp: In function ‘void CountingSort(unsigned int*, unsigned int*, unsigned int)’: user.cpp:17:5: warning: iteration 2047u invokes undefined behavior [-Waggressive-loop-optimizations] for(u32 i = 0x0; i != 0x800; index[++i] = index[~-i] + frequence[~-i]); ^ user.cpp:17:24: note: containing loop for(u32 i = 0x0; i != 0x800; index[++i] = index[~-i] + frequence[~-i]); ^