1 // RUN: %clangxx -DADD_I32 -fsanitize=signed-integer-overflow %s -o %t1 && %run %t1 2>&1 | FileCheck %s --check-prefix=CHECK-ADD_I32
2 // RUN: %clangxx -DADD_I64 -fsanitize=signed-integer-overflow %s -o %t2 && %run %t2 2>&1 | FileCheck %s --check-prefix=CHECK-ADD_I64
3 // RUN: %clangxx -DADD_I128 -fsanitize=signed-integer-overflow %s -o %t3 && %run %t3 2>&1 | FileCheck %s --check-prefix=CHECK-ADD_I128
4
5 #include <stdint.h>
6 #include <stdio.h>
7
main()8 int main() {
9 // These promote to 'int'.
10 (void)(int8_t(0x7f) + int8_t(0x7f));
11 (void)(int16_t(0x3fff) + int16_t(0x4000));
12
13 #ifdef ADD_I32
14 int32_t k = 0x12345678;
15 k += 0x789abcde;
16 // CHECK-ADD_I32: add-overflow.cpp:[[@LINE-1]]:5: runtime error: signed integer overflow: 305419896 + 2023406814 cannot be represented in type 'int'
17 #endif
18
19 #ifdef ADD_I64
20 (void)(int64_t(8000000000000000000ll) + int64_t(2000000000000000000ll));
21 // CHECK-ADD_I64: 8000000000000000000 + 2000000000000000000 cannot be represented in type '{{long( long)?}}'
22 #endif
23
24 #ifdef ADD_I128
25 # if defined(__SIZEOF_INT128__) && !defined(_WIN32)
26 (void)((__int128_t(1) << 126) + (__int128_t(1) << 126));
27 # else
28 puts("__int128 not supported");
29 # endif
30 // CHECK-ADD_I128: {{0x40000000000000000000000000000000 \+ 0x40000000000000000000000000000000 cannot be represented in type '__int128'|__int128 not supported}}
31 #endif
32 }
33