Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 1 | // RUN: %clangxx -DADD_I32 -fsanitize=signed-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-ADD_I32 |
| 2 | // RUN: %clangxx -DADD_I64 -fsanitize=signed-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-ADD_I64 |
| 3 | // RUN: %clangxx -DADD_I128 -fsanitize=signed-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-ADD_I128 |
| 4 | |
| 5 | #include <stdint.h> |
| 6 | #include <stdio.h> |
| 7 | |
| 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 | # ifdef __SIZEOF_INT128__ |
| 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 | } |