42 lines
1.2 KiB
Objective-C
42 lines
1.2 KiB
Objective-C
// RUN: %clang_cc1 -analyze -analyzer-checker=core -analyzer-store=region -analyzer-constraints=range %s -verify
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// expected-no-diagnostics
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//===-- unions-region.m ---------------------------------------------------===//
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//
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// This file tests the analyzer's reasoning about unions.
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//
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//===----------------------------------------------------------------------===//
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// [testA] When using RegionStore, this test case previously had a
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// false positive of a 'pass-by-value argument is uninitialized'
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// warning at the call to 'testA_aux' and 'testA_aux_2'.
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union u_testA {
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unsigned i;
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float f;
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};
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float testA(float f) {
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int testA_aux(unsigned x);
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int testA_aux_2(union u_testA z);
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union u_testA swap;
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swap.f = f;
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if (testA_aux(swap.i)) // no-warning
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swap.i = ((swap.i & 0xffff0000) >> 16) | ((swap.i & 0x0000fffff) << 16);
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testA_aux_2(swap); // no-warning
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return swap.f;
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}
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// [testB] When using RegionStore, this test case previously had a
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// false positive of a 'pass-by-value argument is uninitialized'
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// warning at the call to 'testB_aux'.
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void testB(int i) {
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void testB_aux(short z);
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union { short x[2]; unsigned y; } val;
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val.y = 10;
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testB_aux(val.x[1]); // no-warning
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}
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