1 // RUN: %clang -DADD_I32 -fsanitize=unsigned-integer-overflow %s -o %t && %t 2>&1 | FileCheck %s --check-prefix=ADD_I32 2 // RUN: %clang -DADD_I64 -fsanitize=unsigned-integer-overflow %s -o %t && %t 2>&1 | FileCheck %s --check-prefix=ADD_I64 3 // RUN: %clang -DADD_I128 -fsanitize=unsigned-integer-overflow %s -o %t && %t 2>&1 | FileCheck %s --check-prefix=ADD_I128 4 5 #include <stdint.h> 6 #include <stdio.h> 7 8 int main() { 9 // These promote to 'int'. 10 (void)(uint8_t(0xff) + uint8_t(0xff)); 11 (void)(uint16_t(0xf0fff) + uint16_t(0x0fff)); 12 13 #ifdef ADD_I32 14 uint32_t k = 0x87654321; 15 k += 0xedcba987; 16 // CHECK-ADD_I32: uadd-overflow.cpp:[[@LINE-1]]:5: runtime error: unsigned integer overflow: 2271560481 + 3989547399 cannot be represented in type 'unsigned int' 17 #endif 18 19 #ifdef ADD_I64 20 (void)(uint64_t(10000000000000000000ull) + uint64_t(9000000000000000000ull)); 21 // CHECK-ADD_I64: 10000000000000000000 + 9000000000000000000 cannot be represented in type 'unsigned long' 22 #endif 23 24 #ifdef ADD_I128 25 # ifdef __SIZEOF_INT128__ 26 (void)((__uint128_t(1) << 127) + (__uint128_t(1) << 127)); 27 # else 28 puts("__int128 not supported"); 29 # endif 30 // CHECK-ADD_I128: {{0x80000000000000000000000000000000 \+ 0x80000000000000000000000000000000 cannot be represented in type 'unsigned __int128'|__int128 not supported}} 31 #endif 32 } 33
