| 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 | |
|---|
| 8 | int 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 '{{int32_t|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 '{{int64_t|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_t'|__int128 not supported}} |
|---|
| 30 | #endif |
|---|
| 31 | } |
|---|
| 32 | |
|---|
