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// 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
}
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