32 lines
1.3 KiB
C++
32 lines
1.3 KiB
C++
// 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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// 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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// 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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#include <stdint.h>
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#include <stdio.h>
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int main() {
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// These promote to 'int'.
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(void)(uint8_t(0) - uint8_t(0x7f));
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(void)(uint16_t(0) - uint16_t(0x7fff));
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#ifdef SUB_I32
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(void)(uint32_t(1) - uint32_t(2));
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// CHECK-SUB_I32: usub-overflow.cpp:[[@LINE-1]]:22: runtime error: unsigned integer overflow: 1 - 2 cannot be represented in type 'unsigned int'
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#endif
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#ifdef SUB_I64
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(void)(uint64_t(8000000000000000000ll) - uint64_t(9000000000000000000ll));
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// CHECK-SUB_I64: 8000000000000000000 - 9000000000000000000 cannot be represented in type 'unsigned {{long( long)?}}'
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#endif
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#ifdef SUB_I128
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# if defined(__SIZEOF_INT128__) && !defined(_WIN32)
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(void)((__uint128_t(1) << 126) - (__uint128_t(1) << 127));
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# else
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puts("__int128 not supported\n");
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# endif
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// CHECK-SUB_I128: {{0x40000000000000000000000000000000 - 0x80000000000000000000000000000000 cannot be represented in type 'unsigned __int128'|__int128 not supported}}
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#endif
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}
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