32 lines · cpp
1// RUN: %clangxx -DSUB_I32 -fsanitize=signed-integer-overflow %s -o %t1 && %run %t1 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I322// RUN: %clangxx -DSUB_I64 -fsanitize=signed-integer-overflow %s -o %t2 && %run %t2 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I643// RUN: %clangxx -DSUB_I128 -fsanitize=signed-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)(int8_t(-2) - int8_t(0x7f));11 (void)(int16_t(-2) - int16_t(0x7fff));12 13#ifdef SUB_I3214 (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#endif17 18#ifdef SUB_I6419 (void)(int64_t(-8000000000000000000ll) - int64_t(2000000000000000000ll));20 // CHECK-SUB_I64: -8000000000000000000 - 2000000000000000000 cannot be represented in type '{{int64_t|long( long)?}}'21#endif22 23#ifdef SUB_I12824# if defined(__SIZEOF_INT128__) && !defined(_WIN32)25 (void)(-(__int128_t(1) << 126) - (__int128_t(1) << 126) - 1);26# else27 puts("__int128 not supported");28# endif29 // CHECK-SUB_I128: {{0x80000000000000000000000000000000 - 1 cannot be represented in type '__int128_t'|__int128 not supported}}30#endif31}32