| // RUN: %clangxx -DSUB_I32 -fsanitize=unsigned-integer-overflow %s -o %t && %t 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I32 |
| // RUN: %clangxx -DSUB_I64 -fsanitize=unsigned-integer-overflow %s -o %t && %t 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I64 |
| // RUN: %clangxx -DSUB_I128 -fsanitize=unsigned-integer-overflow %s -o %t && %t 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I128 |
| |
| #include <stdint.h> |
| #include <stdio.h> |
| |
| int main() { |
| // These promote to 'int'. |
| (void)(uint8_t(0) - uint8_t(0x7f)); |
| (void)(uint16_t(0) - uint16_t(0x7fff)); |
| |
| #ifdef SUB_I32 |
| (void)(uint32_t(1) - uint32_t(2)); |
| // CHECK-SUB_I32: usub-overflow.cpp:[[@LINE-1]]:22: runtime error: unsigned integer overflow: 1 - 2 cannot be represented in type 'unsigned int' |
| #endif |
| |
| #ifdef SUB_I64 |
| (void)(uint64_t(8000000000000000000ll) - uint64_t(9000000000000000000ll)); |
| // CHECK-SUB_I64: 8000000000000000000 - 9000000000000000000 cannot be represented in type 'unsigned long' |
| #endif |
| |
| #ifdef SUB_I128 |
| # ifdef __SIZEOF_INT128__ |
| (void)((__uint128_t(1) << 126) - (__uint128_t(1) << 127)); |
| # else |
| puts("__int128 not supported\n"); |
| # endif |
| // CHECK-SUB_I128: {{0x40000000000000000000000000000000 - 0x80000000000000000000000000000000 cannot be represented in type 'unsigned __int128'|__int128 not supported}} |
| #endif |
| } |