1 // RUN: %clangxx -DADD_I32 -fsanitize=unsigned-integer-overflow %s -o %t1 && %run %t1 2>&1 | FileCheck %s --check-prefix=CHECK-ADD_I32
2 // RUN: %clangxx -DADD_I64 -fsanitize=unsigned-integer-overflow %s -o %t2 && %run %t2 2>&1 | FileCheck %s --check-prefix=CHECK-ADD_I64
3 // RUN: %clangxx -DADD_I128 -fsanitize=unsigned-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)(uint8_t(0xff) + uint8_t(0xff));
11 (void)(uint16_t(0xf0fff) + uint16_t(0x0fff));
12
13 #ifdef ADD_I32
14 uint32_t k = 0x87654321;
15 k += 0xedcba987;
16 // CHECK-ADD_I32: uadd-overflow.cpp:[[@LINE-1]]:5: runtime error: unsigned integer overflow: 2271560481 + 3989547399 cannot be represented in type 'unsigned int'
17 #endif
18
19 #ifdef ADD_I64
20 (void)(uint64_t(10000000000000000000ull) + uint64_t(9000000000000000000ull));
21 // CHECK-ADD_I64: 10000000000000000000 + 9000000000000000000 cannot be represented in type 'unsigned {{long( long)?}}'
22 #endif
23
24 #ifdef ADD_I128
25 # if defined(__SIZEOF_INT128__) && !defined(_WIN32)
26 (void)((__uint128_t(1) << 127) + (__uint128_t(1) << 127));
27 # else
28 puts("__int128 not supported");
29 # endif
30 // CHECK-ADD_I128: {{0x80000000000000000000000000000000 \+ 0x80000000000000000000000000000000 cannot be represented in type 'unsigned __int128'|__int128 not supported}}
31 #endif
32 }
33