// RUN: %clang_analyze_cc1 -triple x86_64-unknown-unknown -verify %s \ // RUN: -analyzer-checker=core,debug.ExprInspection,alpha.core.BoolAssignment #define __UINT_MAX__ (__INT_MAX__ * 2U + 1U) #define __INT_MIN__ (-__INT_MAX__ - 1) void clang_analyzer_dump_int(int); void clang_analyzer_dump_long(long); void clang_analyzer_eval(int); void clang_analyzer_warnIfReached(void); void test_add_nooverflow(void) { int res; if (__builtin_add_overflow(10, 20, &res)) { clang_analyzer_warnIfReached(); return; } clang_analyzer_dump_int(res); //expected-warning{{30 S32b}} } void test_add_overflow(void) { int res; if (__builtin_add_overflow(__INT_MAX__, 1, &res)) { clang_analyzer_dump_int(res); //expected-warning{{-2147483648 S32b}} return; } clang_analyzer_warnIfReached(); } void test_add_underoverflow(void) { int res; if (__builtin_add_overflow(__INT_MIN__, -1, &res)) { clang_analyzer_dump_int(res); //expected-warning{{2147483647 S32b}} return; } clang_analyzer_warnIfReached(); } void test_sub_underflow(void) { int res; if (__builtin_sub_overflow(__INT_MIN__, 10, &res)) { return; } clang_analyzer_warnIfReached(); } void test_sub_overflow(void) { int res; if (__builtin_sub_overflow(__INT_MAX__, -1, &res)) { return; } clang_analyzer_warnIfReached(); } void test_sub_nooverflow(void) { int res; if (__builtin_sub_overflow(__INT_MAX__, 1, &res)) { clang_analyzer_warnIfReached(); return; } clang_analyzer_dump_int(res); //expected-warning{{2147483646 S32b}} } void test_mul_overflow(void) { int res; if (__builtin_mul_overflow(__INT_MAX__, 2, &res)) { return; } clang_analyzer_warnIfReached(); } void test_mul_underflow(void) { int res; if (__builtin_mul_overflow(__INT_MIN__, -2, &res)) { return; } clang_analyzer_warnIfReached(); } void test_mul_nooverflow(void) { int res; if (__builtin_mul_overflow(10, -2, &res)) { clang_analyzer_warnIfReached(); return; } clang_analyzer_dump_int(res); //expected-warning{{-20 S32b}} } void test_nooverflow_diff_types(void) { long res; // This is not an overflow, since result type is long. if (__builtin_add_overflow(__INT_MAX__, 1, &res)) { clang_analyzer_warnIfReached(); return; } clang_analyzer_dump_long(res); //expected-warning{{2147483648 S64b}} } void test_uaddll_overflow_contraints(unsigned long a, unsigned long b) { unsigned long long res; if (a != 10) return; if (b != 10) return; if (__builtin_uaddll_overflow(a, b, &res)) { clang_analyzer_warnIfReached(); return; } } void test_uadd_overflow_contraints(unsigned a, unsigned b) { unsigned res; if (a > 5) return; if (b != 10) return; if (__builtin_uadd_overflow(a, b, &res)) { clang_analyzer_warnIfReached(); return; } } void test_bool_assign(void) { int res; // Reproduce issue from GH#111147. __builtin_*_overflow functions // should return _Bool, but not int. _Bool ret = __builtin_mul_overflow(10, 20, &res); // no crash }