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8a6b740995
As rsmith pointed out, the original implementation of this intrinsic missed a number of important situations. This patch fixe a bunch of shortcomings and implementation details to make it work correctly. Differential Revision: https://reviews.llvm.org/D39347 llvm-svn: 319446
33 lines
902 B
C++
33 lines
902 B
C++
// RUN: %clang_cc1 -triple x86_64-linux-pc -DIS64 -fsyntax-only -verify -std=c++17 %s
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// RUN: %clang_cc1 -triple x86_64-windows-pc -DIS64 -fsyntax-only -verify -std=c++17 %s
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// RUN: %clang_cc1 -triple i386-linux-pc -fsyntax-only -verify -std=c++17 %s
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// RUN: %clang_cc1 -triple i386-windows-pc -DW32 -fsyntax-only -verify -std=c++17 %s
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// expected-no-diagnostics
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struct Base {};
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struct A : virtual Base {
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virtual void n() {}
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};
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auto p = &A::n;
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static_assert(__has_unique_object_representations(decltype(p)));
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struct B {
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decltype(p) x;
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int b;
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#ifdef IS64
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// required on 64 bit to fill out the tail padding.
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int c;
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#endif
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};
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static_assert(__has_unique_object_representations(B));
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struct C { // has padding on Win32, but nothing else.
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decltype(p) x;
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};
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#ifdef W32
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static_assert(!__has_unique_object_representations(C));
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#else
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static_assert(__has_unique_object_representations(C));
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#endif
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