| 1 | // RUN: %clangxx -DSUB_I32 -fsanitize=unsigned-integer-overflow %s -o %t1 && %run %t1 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I32 |
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| 2 | // RUN: %clangxx -DSUB_I64 -fsanitize=unsigned-integer-overflow %s -o %t2 && %run %t2 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I64 |
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| 3 | // RUN: %clangxx -DSUB_I128 -fsanitize=unsigned-integer-overflow %s -o %t3 && %run %t3 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I128 |
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| 4 | |
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| 5 | #include <stdint.h> |
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| 6 | #include <stdio.h> |
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| 7 | |
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| 8 | int main() { |
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| 9 | // These promote to 'int'. |
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| 10 | (void)(uint8_t(0) - uint8_t(0x7f)); |
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| 11 | (void)(uint16_t(0) - uint16_t(0x7fff)); |
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| 12 | |
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| 13 | #ifdef SUB_I32 |
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| 14 | (void)(uint32_t(1) - uint32_t(2)); |
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| 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}}' |
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| 16 | #endif |
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| 17 | |
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| 18 | #ifdef SUB_I64 |
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| 19 | (void)(uint64_t(8000000000000000000ll) - uint64_t(9000000000000000000ll)); |
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| 20 | // CHECK-SUB_I64: 8000000000000000000 - 9000000000000000000 cannot be represented in type '{{uint64_t|unsigned long( long)?}}' |
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| 21 | #endif |
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| 22 | |
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| 23 | #ifdef SUB_I128 |
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| 24 | # if defined(__SIZEOF_INT128__) && !defined(_WIN32) |
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| 25 | (void)((__uint128_t(1) << 126) - (__uint128_t(1) << 127)); |
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| 26 | # else |
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| 27 | puts("__int128 not supported\n" ); |
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| 28 | # endif |
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| 29 | // CHECK-SUB_I128: {{0x40000000000000000000000000000000 - 0x80000000000000000000000000000000 cannot be represented in type '__uint128_t'|__int128 not supported}} |
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| 30 | #endif |
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| 31 | } |
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| 32 | |
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