forked from OSchip/llvm-project
36 lines
1.2 KiB
Mathematica
36 lines
1.2 KiB
Mathematica
// RUN: %clang_cc1 -analyze -analyzer-checker=core,core.experimental -analyzer-store=basic -verify -fblocks %s
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//---------------------------------------------------------------------------
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// Test case 'checkaccess_union' differs for region store and basic store.
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// The basic store doesn't reason about compound literals, so the code
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// below won't fire an "uninitialized value" warning.
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//---------------------------------------------------------------------------
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// PR 2948 (testcase; crash on VisitLValue for union types)
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// http://llvm.org/bugs/show_bug.cgi?id=2948
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void checkaccess_union() {
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int ret = 0, status;
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if (((((__extension__ (((union { // no-warning
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__typeof (status) __in; int __i;}
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)
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{
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.__in = (status)}
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).__i))) & 0xff00) >> 8) == 1)
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ret = 1;
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}
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// BasicStore handles this case incorrectly because it doesn't reason about
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// the value pointed to by 'x' and thus creates different symbolic values
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// at the declarations of 'a' and 'b' respectively. See the companion test
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// in 'misc-ps-region-store.m'.
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void test_trivial_symbolic_comparison_pointer_parameter(int *x) {
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int a = *x;
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int b = *x;
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if (a != b) {
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int *p = 0;
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*p = 0xDEADBEEF; // expected-warning{{null}}
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}
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}
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