1// RUN: %clangxx -DSUB_I32 -fsanitize=signed-integer-overflow %s -o %t1 && %run %t1 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I32
2// RUN: %clangxx -DSUB_I64 -fsanitize=signed-integer-overflow %s -o %t2 && %run %t2 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I64
3// RUN: %clangxx -DSUB_I128 -fsanitize=signed-integer-overflow %s -o %t3 && %run %t3 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I128
4
5#include <stdint.h>
6#include <stdio.h>
7
8int main() {
9  // These promote to 'int'.
10  (void)(int8_t(-2) - int8_t(0x7f));
11  (void)(int16_t(-2) - int16_t(0x7fff));
12
13#ifdef SUB_I32
14  (void)(int32_t(-2) - int32_t(0x7fffffff));
15  // CHECK-SUB_I32: sub-overflow.cpp:[[@LINE-1]]:22: runtime error: signed integer overflow: -2 - 2147483647 cannot be represented in type 'int'
16#endif
17
18#ifdef SUB_I64
19  (void)(int64_t(-8000000000000000000ll) - int64_t(2000000000000000000ll));
20  // CHECK-SUB_I64: -8000000000000000000 - 2000000000000000000 cannot be represented in type '{{long( long)?}}'
21#endif
22
23#ifdef SUB_I128
24# if defined(__SIZEOF_INT128__) && !defined(_WIN32)
25  (void)(-(__int128_t(1) << 126) - (__int128_t(1) << 126) - 1);
26# else
27  puts("__int128 not supported");
28# endif
29  // CHECK-SUB_I128: {{0x80000000000000000000000000000000 - 1 cannot be represented in type '__int128'|__int128 not supported}}
30#endif
31}
32