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// RUN: clang-cc -analyze -analyzer-experimental-internal-checks -checker-cfref -analyzer-store=basic -verify -fblocks %s
//---------------------------------------------------------------------------
// Test case 'checkaccess_union' differs for region store and basic store.
// The basic store doesn't reason about compound literals, so the code
// below won't fire an "uninitialized value" 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 { // no-warning
__typeof (status) __in; int __i;}
)
{
.__in = (status)}
).__i))) & 0xff00) >> 8) == 1)
ret = 1;
}
// BasicStore handles this case incorrectly because it doesn't reason about
// the value pointed to by 'x' and thus creates different symbolic values
// at the declarations of 'a' and 'b' respectively. See the companion test
// in 'misc-ps-region-store.m'.
void test_trivial_symbolic_comparison_pointer_parameter(int *x) {
int a = *x;
int b = *x;
if (a != b) {
int *p = 0;
*p = 0xDEADBEEF; // expected-warning{{null}}
}
}
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