// RUN: %clangxx -DSUB_I32 -fsanitize=signed-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I32 // RUN: %clangxx -DSUB_I64 -fsanitize=signed-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I64 // RUN: %clangxx -DSUB_I128 -fsanitize=signed-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I128 #include <stdint.h> #include <stdio.h> int main() { // These promote to 'int'. (void)(int8_t(-2) - int8_t(0x7f)); (void)(int16_t(-2) - int16_t(0x7fff)); #ifdef SUB_I32 (void)(int32_t(-2) - int32_t(0x7fffffff)); // CHECK-SUB_I32: sub-overflow.cpp:[[@LINE-1]]:22: runtime error: signed integer overflow: -2 - 2147483647 cannot be represented in type 'int' #endif #ifdef SUB_I64 (void)(int64_t(-8000000000000000000ll) - int64_t(2000000000000000000ll)); // CHECK-SUB_I64: -8000000000000000000 - 2000000000000000000 cannot be represented in type '{{long( long)?}}' #endif #ifdef SUB_I128 # ifdef __SIZEOF_INT128__ (void)(-(__int128_t(1) << 126) - (__int128_t(1) << 126) - 1); # else puts("__int128 not supported"); # endif // CHECK-SUB_I128: {{0x80000000000000000000000000000000 - 1 cannot be represented in type '__int128'|__int128 not supported}} #endif }