| Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 1 | // RUN: %clangxx -DSUB_I32 -fsanitize=unsigned-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I32 |
| 2 | // RUN: %clangxx -DSUB_I64 -fsanitize=unsigned-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I64 |
| 3 | // RUN: %clangxx -DSUB_I128 -fsanitize=unsigned-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I128 |
| 4 | |
| 5 | #include <stdint.h> |
| 6 | #include <stdio.h> |
| 7 | |
| 8 | int main() { |
| 9 | // These promote to 'int'. |
| 10 | (void)(uint8_t(0) - uint8_t(0x7f)); |
| 11 | (void)(uint16_t(0) - uint16_t(0x7fff)); |
| 12 | |
| 13 | #ifdef SUB_I32 |
| 14 | (void)(uint32_t(1) - uint32_t(2)); |
| 15 | // CHECK-SUB_I32: usub-overflow.cpp:[[@LINE-1]]:22: runtime error: unsigned integer overflow: 1 - 2 cannot be represented in type 'unsigned int' |
| 16 | #endif |
| 17 | |
| 18 | #ifdef SUB_I64 |
| 19 | (void)(uint64_t(8000000000000000000ll) - uint64_t(9000000000000000000ll)); |
| 20 | // CHECK-SUB_I64: 8000000000000000000 - 9000000000000000000 cannot be represented in type 'unsigned {{long( long)?}}' |
| 21 | #endif |
| 22 | |
| 23 | #ifdef SUB_I128 |
| 24 | # ifdef __SIZEOF_INT128__ |
| 25 | (void)((__uint128_t(1) << 126) - (__uint128_t(1) << 127)); |
| 26 | # else |
| 27 | puts("__int128 not supported\n"); |
| 28 | # endif |
| 29 | // CHECK-SUB_I128: {{0x40000000000000000000000000000000 - 0x80000000000000000000000000000000 cannot be represented in type 'unsigned __int128'|__int128 not supported}} |
| 30 | #endif |
| 31 | } |