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// RUN: %clang_analyze_cc1 -triple x86_64-unknown-unknown -verify %s \
// RUN: -analyzer-checker=core,debug.ExprInspection -analyzer-disable-checker=core.FixedAddressDereference
template <typename T> void clang_analyzer_dump(T);
using size_t = decltype(sizeof(int));
__attribute__((always_inline)) static inline constexpr unsigned int _castf32_u32(float __A) {
return __builtin_bit_cast(unsigned int, __A); // no-warning
}
void test(int i) {
_castf32_u32(42);
float f = 42;
// Loading from a floating point value results in unknown,
// which later materializes as a conjured value.
auto g = __builtin_bit_cast(unsigned int, f);
clang_analyzer_dump(g);
// expected-warning-re@-1 {{{{^conj_\$[0-9]+{unsigned int,}}}}
auto g2 = __builtin_bit_cast(unsigned int, 42.0f);
clang_analyzer_dump(g2);
// expected-warning-re@-1 {{{{^conj_\$[0-9]+{unsigned int,}}}}
auto g3 = __builtin_bit_cast(unsigned int, i);
clang_analyzer_dump(g3);
// expected-warning-re@-1 {{{{^reg_\$[0-9]+<int i>}}}}
auto g4 = __builtin_bit_cast(unsigned long, &i);
clang_analyzer_dump(g4);
// expected-warning@-1 {{&i [as 64 bit integer]}}
}
struct A {
int n;
void set(int x) {
n = x;
}
};
void gh_69922(size_t p) {
// expected-warning@+1 {{Unknown}}
clang_analyzer_dump(__builtin_bit_cast(A*, p & 1));
__builtin_bit_cast(A*, p & 1)->set(2); // no-crash
// However, since the `this` pointer is expected to be a Loc, but we have
// NonLoc there, we simply give up and resolve it as `Unknown`.
// Then, inside the `set()` member function call we can't evaluate the
// store to the member variable `n`.
clang_analyzer_dump(__builtin_bit_cast(A*, p & 1)->n); // Ideally, this should print "2".
// expected-warning@-1 {{Unknown}}
}
namespace {
typedef unsigned long uintptr_t;
bool previously_crash(const void *& ptr) {
clang_analyzer_dump(__builtin_bit_cast(void*, static_cast<uintptr_t>(-1)));
// expected-warning-re@-1 {{{{[0-9]+}} (Loc)}}
return ptr == __builtin_bit_cast(void*, static_cast<uintptr_t>(-1));
}
void check_loc_concreteInt() {
clang_analyzer_dump(__builtin_bit_cast(unsigned, *(reinterpret_cast<int*>(0xdeadbeef))));
// expected-warning@-1 {{Unknown}}
}
}
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