| 1 | // RUN: %clangxx -fsanitize=unsigned-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck %s |
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| 2 | |
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| 3 | #include <stdint.h> |
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| 4 | |
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| 5 | int main() { |
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| 6 | // These promote to 'int'. |
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| 7 | (void)(int8_t(-2) * int8_t(0x7f)); |
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| 8 | (void)(int16_t(0x7fff) * int16_t(0x7fff)); |
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| 9 | (void)(uint16_t(0xffff) * int16_t(0x7fff)); |
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| 10 | (void)(uint16_t(0xffff) * uint16_t(0x8000)); |
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| 11 | |
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| 12 | // Not an unsigned overflow |
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| 13 | (void)(uint16_t(0xffff) * uint16_t(0x8001)); |
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| 14 | |
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| 15 | (void)(uint32_t(0xffffffff) * uint32_t(0x2)); |
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| 16 | // CHECK: umul-overflow.cpp:15:31: runtime error: unsigned integer overflow: 4294967295 * 2 cannot be represented in type '{{uint32_t|unsigned int}}' |
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| 17 | |
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| 18 | return 0; |
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| 19 | } |
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| 20 | |
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