ea3eb8d625
Compute the offset from the record layout. Unfortunately, not all the test cases from the current interpreter work.
57 lines
2.0 KiB
C++
57 lines
2.0 KiB
C++
// RUN: %clang_cc1 -fexperimental-new-constant-interpreter -verify=both,expected %s
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// RUN: %clang_cc1 -verify=both,ref %s
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// ref-no-diagnostics
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typedef __SIZE_TYPE__ size_t;
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int a;
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static_assert(__builtin_object_size(&a, 0) == sizeof(int), "");
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float f;
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static_assert(__builtin_object_size(&f, 0) == sizeof(float), "");
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int arr[2];
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static_assert(__builtin_object_size(&arr, 0) == (sizeof(int)*2), "");
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float arrf[2];
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static_assert(__builtin_object_size(&arrf, 0) == (sizeof(float)*2), "");
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static_assert(__builtin_object_size(&arrf[1], 0) == sizeof(float), "");
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static_assert(__builtin_object_size(&arrf[2], 0) == 0, "");
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struct S {
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int a;
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char c;
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};
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S s;
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static_assert(__builtin_object_size(&s, 0) == sizeof(s), "");
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S ss[2];
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static_assert(__builtin_object_size(&ss[1], 0) == sizeof(s), "");
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static_assert(__builtin_object_size(&ss[1].c, 0) == sizeof(int), "");
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struct A { char buf[16]; };
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struct B : A {};
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struct C { int i; B bs[1]; } c;
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static_assert(__builtin_object_size(&c.bs[0], 3) == 16);
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static_assert(__builtin_object_size(&c.bs[1], 3) == 0);
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/// These are from test/SemaCXX/builtin-object-size-cxx14.
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/// They all don't work since they are rejected when evaluating the first
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/// parameter of the __builtin_object_size call.
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///
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/// GCC rejects them as well.
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namespace InvalidBase {
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// Ensure this doesn't crash.
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struct S { const char *name; };
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S invalid_base(); // expected-note {{declared here}}
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constexpr size_t bos_name = __builtin_object_size(invalid_base().name, 1); // expected-error {{must be initialized by a constant expression}} \
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// expected-note {{non-constexpr function 'invalid_base'}}
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struct T { ~T(); };
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T invalid_base_2();
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constexpr size_t bos_dtor = __builtin_object_size(&(T&)(T&&)invalid_base_2(), 0); // expected-error {{must be initialized by a constant expression}} \
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// expected-note {{non-literal type 'T'}}
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}
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