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20 lines
614 B
20 lines
614 B
// RUN: %clangxx -fsanitize=unsigned-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck %s
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#include <stdint.h>
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int main() {
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// These promote to 'int'.
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(void)(int8_t(-2) * int8_t(0x7f));
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(void)(int16_t(0x7fff) * int16_t(0x7fff));
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(void)(uint16_t(0xffff) * int16_t(0x7fff));
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(void)(uint16_t(0xffff) * uint16_t(0x8000));
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// Not an unsigned overflow
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(void)(uint16_t(0xffff) * uint16_t(0x8001));
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(void)(uint32_t(0xffffffff) * uint32_t(0x2));
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// CHECK: umul-overflow.cpp:15:31: runtime error: unsigned integer overflow: 4294967295 * 2 cannot be represented in type 'unsigned int'
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return 0;
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}
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