| 1 | // RUN: %clangxx -fsanitize=signed-integer-overflow %s -o %t1 && %run %t1 2>&1 | FileCheck %s --check-prefix=CHECKS |
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| 2 | // RUN: %clangxx -fsanitize=unsigned-integer-overflow %s -o %t2 && %run %t2 2>&1 | FileCheck %s --check-prefix=CHECKU |
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| 3 | // RUN: %clangxx -fsanitize=unsigned-integer-overflow %s -o %t2 && %env_ubsan_opts=silence_unsigned_overflow=1 %run %t2 2>&1 | FileCheck %s --check-prefix=CHECKU-SILENT --allow-empty |
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| 4 | |
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| 5 | int main() { |
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| 6 | // CHECKS-NOT: runtime error |
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| 7 | // CHECKU: negate-overflow.cpp:[[@LINE+3]]:3: runtime error: negation of 2147483648 cannot be represented in type 'unsigned int' |
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| 8 | // CHECKU-NOT: cast to an unsigned |
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| 9 | // CHECKU-SILENT-NOT: runtime error |
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| 10 | -unsigned(-0x7fffffff - 1); // ok |
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| 11 | // CHECKS: negate-overflow.cpp:[[@LINE+2]]:3: runtime error: negation of -2147483648 cannot be represented in type 'int'; cast to an unsigned type to negate this value to itself |
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| 12 | // CHECKU-NOT: runtime error |
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| 13 | -(-0x7fffffff - 1); |
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| 14 | |
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| 15 | return 0; |
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| 16 | } |
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| 17 | |
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