32 lines · cpp
1// RUN: %clangxx -DSUB_I32 -fsanitize=unsigned-integer-overflow %s -o %t1 && %run %t1 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I322// RUN: %clangxx -DSUB_I64 -fsanitize=unsigned-integer-overflow %s -o %t2 && %run %t2 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I643// RUN: %clangxx -DSUB_I128 -fsanitize=unsigned-integer-overflow %s -o %t3 && %run %t3 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I1284 5#include <stdint.h>6#include <stdio.h>7 8int 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_I3214 (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 '{{uint32_t|unsigned int}}'16#endif17 18#ifdef SUB_I6419 (void)(uint64_t(8000000000000000000ll) - uint64_t(9000000000000000000ll));20 // CHECK-SUB_I64: 8000000000000000000 - 9000000000000000000 cannot be represented in type '{{uint64_t|unsigned long( long)?}}'21#endif22 23#ifdef SUB_I12824# if defined(__SIZEOF_INT128__) && !defined(_WIN32)25 (void)((__uint128_t(1) << 126) - (__uint128_t(1) << 127));26# else27 puts("__int128 not supported\n");28# endif29 // CHECK-SUB_I128: {{0x40000000000000000000000000000000 - 0x80000000000000000000000000000000 cannot be represented in type '__uint128_t'|__int128 not supported}}30#endif31}32