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// RUN: clang -checker-cfref --verify %s
// Reduced test case from crash in <rdar://problem/6253157>
@class NSObject;
@interface A @end
@implementation A
- (void)foo:(void (^)(NSObject *x))block {
if (!((block != ((void *)0)))) {}
}
@end
// Reduced test case from crash in PR 2796;
// http://llvm.org/bugs/show_bug.cgi?id=2796
unsigned foo(unsigned x) { return __alignof__((x)) + sizeof(x); }
// Improvement to path-sensitivity involving compound assignments.
// Addresses false positive in <rdar://problem/6268365>
//
unsigned r6268365Aux();
void r6268365() {
unsigned x = 0;
x &= r6268365Aux();
unsigned j = 0;
if (x == 0) ++j;
if (x == 0) x = x / j; // no-warning
}
void divzeroassume(unsigned x, unsigned j) {
x /= j;
if (j == 0) x /= 0; // no-warning
if (j == 0) x /= j; // no-warning
if (j == 0) x = x / 0; // no-warning
}
void divzeroassumeB(unsigned x, unsigned j) {
x = x / j;
if (j == 0) x /= 0; // no-warning
if (j == 0) x /= j; // no-warning
if (j == 0) x = x / 0; // no-warning
}
// PR 2948 (testcase; crash on VisitLValue for union types)
// http://llvm.org/bugs/show_bug.cgi?id=2948
void checkaccess_union() {
int ret = 0, status;
if (((((__extension__ (((union {
__typeof (status) __in; int __i;}
)
{
.__in = (status)}
).__i))) & 0xff00) >> 8) == 1)
ret = 1;
}
// InitListExpr processing
typedef float __m128 __attribute__((__vector_size__(16), __may_alias__));
__m128 return128() {
// This compound literal has a Vector type. We currently just
// return UnknownVal.
return __extension__(__m128) { 0.0f, 0.0f, 0.0f, 0.0f };
}
typedef long long __v2di __attribute__ ((__vector_size__ (16)));
typedef long long __m128i __attribute__ ((__vector_size__ (16), __may_alias__));
__m128i vec128i(long long __q1, long long __q0) {
// This compound literal returns true for both isVectorType() and
// isIntegerType().
return __extension__ (__m128i)(__v2di){ __q0, __q1 };
}
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