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2c21baa806
test. Do that after we suppress the warnings for unknown pragmas as this warning flag is quite new in Clang and so old Clang's would warn all the time on this file. llvm-svn: 226444
336 lines
14 KiB
C++
336 lines
14 KiB
C++
//=== - llvm/unittest/Support/AlignOfTest.cpp - Alignment utility tests ----===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/AlignOf.h"
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#include "llvm/Support/Compiler.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace {
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// Disable warnings about questionable type definitions.
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// We're testing that even questionable types work with the alignment utilities.
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#ifdef _MSC_VER
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#pragma warning(disable:4584)
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#endif
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// Suppress direct base '{anonymous}::S1' inaccessible in '{anonymous}::D9'
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// due to ambiguity warning.
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#ifdef __clang__
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#pragma clang diagnostic ignored "-Wunknown-pragmas"
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#pragma clang diagnostic ignored "-Winaccessible-base"
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#elif ((__GNUC__ * 100) + __GNUC_MINOR__) >= 402
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// Pragma based warning suppression was introduced in GGC 4.2. Additionally
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// this warning is "enabled by default". The warning still appears if -Wall is
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// suppressed. Apparently GCC suppresses it when -w is specifed, which is odd.
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#pragma GCC diagnostic warning "-w"
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#endif
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// Define some fixed alignment types to use in these tests.
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#if __has_feature(cxx_alignas)
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struct alignas(1) A1 { };
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struct alignas(2) A2 { };
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struct alignas(4) A4 { };
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struct alignas(8) A8 { };
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#elif defined(__GNUC__)
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struct A1 { } __attribute__((aligned(1)));
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struct A2 { } __attribute__((aligned(2)));
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struct A4 { } __attribute__((aligned(4)));
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struct A8 { } __attribute__((aligned(8)));
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#elif defined(_MSC_VER)
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__declspec(align(1)) struct A1 { };
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__declspec(align(2)) struct A2 { };
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__declspec(align(4)) struct A4 { };
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__declspec(align(8)) struct A8 { };
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#else
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# error No supported align as directive.
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#endif
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struct S1 {};
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struct S2 { char a; };
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struct S3 { int x; };
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struct S4 { double y; };
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struct S5 { A1 a1; A2 a2; A4 a4; A8 a8; };
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struct S6 { double f(); };
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struct D1 : S1 {};
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struct D2 : S6 { float g(); };
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struct D3 : S2 {};
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struct D4 : S2 { int x; };
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struct D5 : S3 { char c; };
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struct D6 : S2, S3 {};
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struct D7 : S1, S3 {};
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struct D8 : S1, D4, D5 { double x[2]; };
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struct D9 : S1, D1 { S1 s1; };
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struct V1 { virtual ~V1(); };
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struct V2 { int x; virtual ~V2(); };
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struct V3 : V1 { virtual ~V3(); };
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struct V4 : virtual V2 { int y; virtual ~V4(); };
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struct V5 : V4, V3 { double z; virtual ~V5(); };
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struct V6 : S1 { virtual ~V6(); };
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struct V7 : virtual V2, virtual V6 { virtual ~V7(); };
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struct V8 : V5, virtual V6, V7 { double zz; virtual ~V8(); };
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double S6::f() { return 0.0; }
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float D2::g() { return 0.0f; }
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V1::~V1() {}
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V2::~V2() {}
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V3::~V3() {}
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V4::~V4() {}
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V5::~V5() {}
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V6::~V6() {}
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V7::~V7() {}
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V8::~V8() {}
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// Ensure alignment is a compile-time constant.
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char LLVM_ATTRIBUTE_UNUSED test_arr1
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[AlignOf<char>::Alignment > 0]
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[AlignOf<short>::Alignment > 0]
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[AlignOf<int>::Alignment > 0]
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[AlignOf<long>::Alignment > 0]
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[AlignOf<long long>::Alignment > 0]
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[AlignOf<float>::Alignment > 0]
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[AlignOf<double>::Alignment > 0]
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[AlignOf<long double>::Alignment > 0]
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[AlignOf<void *>::Alignment > 0]
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[AlignOf<int *>::Alignment > 0]
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[AlignOf<double (*)(double)>::Alignment > 0]
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[AlignOf<double (S6::*)()>::Alignment > 0];
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char LLVM_ATTRIBUTE_UNUSED test_arr2
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[AlignOf<A1>::Alignment > 0]
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[AlignOf<A2>::Alignment > 0]
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[AlignOf<A4>::Alignment > 0]
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[AlignOf<A8>::Alignment > 0];
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char LLVM_ATTRIBUTE_UNUSED test_arr3
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[AlignOf<S1>::Alignment > 0]
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[AlignOf<S2>::Alignment > 0]
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[AlignOf<S3>::Alignment > 0]
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[AlignOf<S4>::Alignment > 0]
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[AlignOf<S5>::Alignment > 0]
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[AlignOf<S6>::Alignment > 0];
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char LLVM_ATTRIBUTE_UNUSED test_arr4
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[AlignOf<D1>::Alignment > 0]
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[AlignOf<D2>::Alignment > 0]
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[AlignOf<D3>::Alignment > 0]
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[AlignOf<D4>::Alignment > 0]
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[AlignOf<D5>::Alignment > 0]
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[AlignOf<D6>::Alignment > 0]
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[AlignOf<D7>::Alignment > 0]
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[AlignOf<D8>::Alignment > 0]
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[AlignOf<D9>::Alignment > 0];
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char LLVM_ATTRIBUTE_UNUSED test_arr5
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[AlignOf<V1>::Alignment > 0]
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[AlignOf<V2>::Alignment > 0]
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[AlignOf<V3>::Alignment > 0]
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[AlignOf<V4>::Alignment > 0]
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[AlignOf<V5>::Alignment > 0]
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[AlignOf<V6>::Alignment > 0]
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[AlignOf<V7>::Alignment > 0]
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[AlignOf<V8>::Alignment > 0];
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TEST(AlignOfTest, BasicAlignmentInvariants) {
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EXPECT_LE(1u, alignOf<A1>());
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EXPECT_LE(2u, alignOf<A2>());
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EXPECT_LE(4u, alignOf<A4>());
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EXPECT_LE(8u, alignOf<A8>());
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EXPECT_EQ(1u, alignOf<char>());
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EXPECT_LE(alignOf<char>(), alignOf<short>());
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EXPECT_LE(alignOf<short>(), alignOf<int>());
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EXPECT_LE(alignOf<int>(), alignOf<long>());
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EXPECT_LE(alignOf<long>(), alignOf<long long>());
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EXPECT_LE(alignOf<char>(), alignOf<float>());
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EXPECT_LE(alignOf<float>(), alignOf<double>());
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EXPECT_LE(alignOf<char>(), alignOf<long double>());
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EXPECT_LE(alignOf<char>(), alignOf<void *>());
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EXPECT_EQ(alignOf<void *>(), alignOf<int *>());
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EXPECT_LE(alignOf<char>(), alignOf<S1>());
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EXPECT_LE(alignOf<S1>(), alignOf<S2>());
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EXPECT_LE(alignOf<S1>(), alignOf<S3>());
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EXPECT_LE(alignOf<S1>(), alignOf<S4>());
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EXPECT_LE(alignOf<S1>(), alignOf<S5>());
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EXPECT_LE(alignOf<S1>(), alignOf<S6>());
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EXPECT_LE(alignOf<S1>(), alignOf<D1>());
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EXPECT_LE(alignOf<S1>(), alignOf<D2>());
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EXPECT_LE(alignOf<S1>(), alignOf<D3>());
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EXPECT_LE(alignOf<S1>(), alignOf<D4>());
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EXPECT_LE(alignOf<S1>(), alignOf<D5>());
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EXPECT_LE(alignOf<S1>(), alignOf<D6>());
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EXPECT_LE(alignOf<S1>(), alignOf<D7>());
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EXPECT_LE(alignOf<S1>(), alignOf<D8>());
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EXPECT_LE(alignOf<S1>(), alignOf<D9>());
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EXPECT_LE(alignOf<S1>(), alignOf<V1>());
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EXPECT_LE(alignOf<V1>(), alignOf<V2>());
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EXPECT_LE(alignOf<V1>(), alignOf<V3>());
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EXPECT_LE(alignOf<V1>(), alignOf<V4>());
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EXPECT_LE(alignOf<V1>(), alignOf<V5>());
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EXPECT_LE(alignOf<V1>(), alignOf<V6>());
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EXPECT_LE(alignOf<V1>(), alignOf<V7>());
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EXPECT_LE(alignOf<V1>(), alignOf<V8>());
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}
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TEST(AlignOfTest, BasicAlignedArray) {
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EXPECT_LE(1u, alignOf<AlignedCharArrayUnion<A1> >());
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EXPECT_LE(2u, alignOf<AlignedCharArrayUnion<A2> >());
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EXPECT_LE(4u, alignOf<AlignedCharArrayUnion<A4> >());
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EXPECT_LE(8u, alignOf<AlignedCharArrayUnion<A8> >());
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EXPECT_LE(1u, sizeof(AlignedCharArrayUnion<A1>));
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EXPECT_LE(2u, sizeof(AlignedCharArrayUnion<A2>));
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EXPECT_LE(4u, sizeof(AlignedCharArrayUnion<A4>));
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EXPECT_LE(8u, sizeof(AlignedCharArrayUnion<A8>));
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EXPECT_EQ(1u, (alignOf<AlignedCharArrayUnion<A1> >()));
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EXPECT_EQ(2u, (alignOf<AlignedCharArrayUnion<A1, A2> >()));
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EXPECT_EQ(4u, (alignOf<AlignedCharArrayUnion<A1, A2, A4> >()));
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EXPECT_EQ(8u, (alignOf<AlignedCharArrayUnion<A1, A2, A4, A8> >()));
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EXPECT_EQ(1u, sizeof(AlignedCharArrayUnion<A1>));
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EXPECT_EQ(2u, sizeof(AlignedCharArrayUnion<A1, A2>));
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EXPECT_EQ(4u, sizeof(AlignedCharArrayUnion<A1, A2, A4>));
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EXPECT_EQ(8u, sizeof(AlignedCharArrayUnion<A1, A2, A4, A8>));
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EXPECT_EQ(1u, (alignOf<AlignedCharArrayUnion<A1[1]> >()));
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EXPECT_EQ(2u, (alignOf<AlignedCharArrayUnion<A1[2], A2[1]> >()));
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EXPECT_EQ(4u, (alignOf<AlignedCharArrayUnion<A1[42], A2[55],
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A4[13]> >()));
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EXPECT_EQ(8u, (alignOf<AlignedCharArrayUnion<A1[2], A2[1],
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A4, A8> >()));
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EXPECT_EQ(1u, sizeof(AlignedCharArrayUnion<A1[1]>));
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EXPECT_EQ(2u, sizeof(AlignedCharArrayUnion<A1[2], A2[1]>));
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EXPECT_EQ(4u, sizeof(AlignedCharArrayUnion<A1[3], A2[2], A4>));
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EXPECT_EQ(16u, sizeof(AlignedCharArrayUnion<A1, A2[3],
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A4[3], A8>));
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// For other tests we simply assert that the alignment of the union mathes
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// that of the fundamental type and hope that we have any weird type
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// productions that would trigger bugs.
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EXPECT_EQ(alignOf<char>(), alignOf<AlignedCharArrayUnion<char> >());
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EXPECT_EQ(alignOf<short>(), alignOf<AlignedCharArrayUnion<short> >());
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EXPECT_EQ(alignOf<int>(), alignOf<AlignedCharArrayUnion<int> >());
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EXPECT_EQ(alignOf<long>(), alignOf<AlignedCharArrayUnion<long> >());
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EXPECT_EQ(alignOf<long long>(),
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alignOf<AlignedCharArrayUnion<long long> >());
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EXPECT_EQ(alignOf<float>(), alignOf<AlignedCharArrayUnion<float> >());
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EXPECT_EQ(alignOf<double>(), alignOf<AlignedCharArrayUnion<double> >());
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EXPECT_EQ(alignOf<long double>(),
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alignOf<AlignedCharArrayUnion<long double> >());
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EXPECT_EQ(alignOf<void *>(), alignOf<AlignedCharArrayUnion<void *> >());
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EXPECT_EQ(alignOf<int *>(), alignOf<AlignedCharArrayUnion<int *> >());
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EXPECT_EQ(alignOf<double (*)(double)>(),
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alignOf<AlignedCharArrayUnion<double (*)(double)> >());
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EXPECT_EQ(alignOf<double (S6::*)()>(),
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alignOf<AlignedCharArrayUnion<double (S6::*)()> >());
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EXPECT_EQ(alignOf<S1>(), alignOf<AlignedCharArrayUnion<S1> >());
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EXPECT_EQ(alignOf<S2>(), alignOf<AlignedCharArrayUnion<S2> >());
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EXPECT_EQ(alignOf<S3>(), alignOf<AlignedCharArrayUnion<S3> >());
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EXPECT_EQ(alignOf<S4>(), alignOf<AlignedCharArrayUnion<S4> >());
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EXPECT_EQ(alignOf<S5>(), alignOf<AlignedCharArrayUnion<S5> >());
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EXPECT_EQ(alignOf<S6>(), alignOf<AlignedCharArrayUnion<S6> >());
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EXPECT_EQ(alignOf<D1>(), alignOf<AlignedCharArrayUnion<D1> >());
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EXPECT_EQ(alignOf<D2>(), alignOf<AlignedCharArrayUnion<D2> >());
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EXPECT_EQ(alignOf<D3>(), alignOf<AlignedCharArrayUnion<D3> >());
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EXPECT_EQ(alignOf<D4>(), alignOf<AlignedCharArrayUnion<D4> >());
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EXPECT_EQ(alignOf<D5>(), alignOf<AlignedCharArrayUnion<D5> >());
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EXPECT_EQ(alignOf<D6>(), alignOf<AlignedCharArrayUnion<D6> >());
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EXPECT_EQ(alignOf<D7>(), alignOf<AlignedCharArrayUnion<D7> >());
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EXPECT_EQ(alignOf<D8>(), alignOf<AlignedCharArrayUnion<D8> >());
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EXPECT_EQ(alignOf<D9>(), alignOf<AlignedCharArrayUnion<D9> >());
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EXPECT_EQ(alignOf<V1>(), alignOf<AlignedCharArrayUnion<V1> >());
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EXPECT_EQ(alignOf<V2>(), alignOf<AlignedCharArrayUnion<V2> >());
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EXPECT_EQ(alignOf<V3>(), alignOf<AlignedCharArrayUnion<V3> >());
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EXPECT_EQ(alignOf<V4>(), alignOf<AlignedCharArrayUnion<V4> >());
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EXPECT_EQ(alignOf<V5>(), alignOf<AlignedCharArrayUnion<V5> >());
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EXPECT_EQ(alignOf<V6>(), alignOf<AlignedCharArrayUnion<V6> >());
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EXPECT_EQ(alignOf<V7>(), alignOf<AlignedCharArrayUnion<V7> >());
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// Some versions of MSVC get this wrong somewhat disturbingly. The failure
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// appears to be benign: alignOf<V8>() produces a preposterous value: 12
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#ifndef _MSC_VER
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EXPECT_EQ(alignOf<V8>(), alignOf<AlignedCharArrayUnion<V8> >());
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#endif
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EXPECT_EQ(sizeof(char), sizeof(AlignedCharArrayUnion<char>));
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EXPECT_EQ(sizeof(char[1]), sizeof(AlignedCharArrayUnion<char[1]>));
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EXPECT_EQ(sizeof(char[2]), sizeof(AlignedCharArrayUnion<char[2]>));
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EXPECT_EQ(sizeof(char[3]), sizeof(AlignedCharArrayUnion<char[3]>));
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EXPECT_EQ(sizeof(char[4]), sizeof(AlignedCharArrayUnion<char[4]>));
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EXPECT_EQ(sizeof(char[5]), sizeof(AlignedCharArrayUnion<char[5]>));
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EXPECT_EQ(sizeof(char[8]), sizeof(AlignedCharArrayUnion<char[8]>));
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EXPECT_EQ(sizeof(char[13]), sizeof(AlignedCharArrayUnion<char[13]>));
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EXPECT_EQ(sizeof(char[16]), sizeof(AlignedCharArrayUnion<char[16]>));
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EXPECT_EQ(sizeof(char[21]), sizeof(AlignedCharArrayUnion<char[21]>));
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EXPECT_EQ(sizeof(char[32]), sizeof(AlignedCharArrayUnion<char[32]>));
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EXPECT_EQ(sizeof(short), sizeof(AlignedCharArrayUnion<short>));
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EXPECT_EQ(sizeof(int), sizeof(AlignedCharArrayUnion<int>));
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EXPECT_EQ(sizeof(long), sizeof(AlignedCharArrayUnion<long>));
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EXPECT_EQ(sizeof(long long),
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sizeof(AlignedCharArrayUnion<long long>));
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EXPECT_EQ(sizeof(float), sizeof(AlignedCharArrayUnion<float>));
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EXPECT_EQ(sizeof(double), sizeof(AlignedCharArrayUnion<double>));
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EXPECT_EQ(sizeof(long double),
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sizeof(AlignedCharArrayUnion<long double>));
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EXPECT_EQ(sizeof(void *), sizeof(AlignedCharArrayUnion<void *>));
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EXPECT_EQ(sizeof(int *), sizeof(AlignedCharArrayUnion<int *>));
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EXPECT_EQ(sizeof(double (*)(double)),
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sizeof(AlignedCharArrayUnion<double (*)(double)>));
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EXPECT_EQ(sizeof(double (S6::*)()),
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sizeof(AlignedCharArrayUnion<double (S6::*)()>));
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EXPECT_EQ(sizeof(S1), sizeof(AlignedCharArrayUnion<S1>));
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EXPECT_EQ(sizeof(S2), sizeof(AlignedCharArrayUnion<S2>));
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EXPECT_EQ(sizeof(S3), sizeof(AlignedCharArrayUnion<S3>));
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EXPECT_EQ(sizeof(S4), sizeof(AlignedCharArrayUnion<S4>));
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EXPECT_EQ(sizeof(S5), sizeof(AlignedCharArrayUnion<S5>));
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EXPECT_EQ(sizeof(S6), sizeof(AlignedCharArrayUnion<S6>));
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EXPECT_EQ(sizeof(D1), sizeof(AlignedCharArrayUnion<D1>));
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EXPECT_EQ(sizeof(D2), sizeof(AlignedCharArrayUnion<D2>));
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EXPECT_EQ(sizeof(D3), sizeof(AlignedCharArrayUnion<D3>));
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EXPECT_EQ(sizeof(D4), sizeof(AlignedCharArrayUnion<D4>));
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EXPECT_EQ(sizeof(D5), sizeof(AlignedCharArrayUnion<D5>));
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EXPECT_EQ(sizeof(D6), sizeof(AlignedCharArrayUnion<D6>));
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EXPECT_EQ(sizeof(D7), sizeof(AlignedCharArrayUnion<D7>));
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EXPECT_EQ(sizeof(D8), sizeof(AlignedCharArrayUnion<D8>));
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EXPECT_EQ(sizeof(D9), sizeof(AlignedCharArrayUnion<D9>));
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EXPECT_EQ(sizeof(D9[1]), sizeof(AlignedCharArrayUnion<D9[1]>));
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EXPECT_EQ(sizeof(D9[2]), sizeof(AlignedCharArrayUnion<D9[2]>));
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EXPECT_EQ(sizeof(D9[3]), sizeof(AlignedCharArrayUnion<D9[3]>));
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EXPECT_EQ(sizeof(D9[4]), sizeof(AlignedCharArrayUnion<D9[4]>));
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EXPECT_EQ(sizeof(D9[5]), sizeof(AlignedCharArrayUnion<D9[5]>));
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EXPECT_EQ(sizeof(D9[8]), sizeof(AlignedCharArrayUnion<D9[8]>));
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EXPECT_EQ(sizeof(D9[13]), sizeof(AlignedCharArrayUnion<D9[13]>));
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EXPECT_EQ(sizeof(D9[16]), sizeof(AlignedCharArrayUnion<D9[16]>));
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EXPECT_EQ(sizeof(D9[21]), sizeof(AlignedCharArrayUnion<D9[21]>));
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EXPECT_EQ(sizeof(D9[32]), sizeof(AlignedCharArrayUnion<D9[32]>));
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EXPECT_EQ(sizeof(V1), sizeof(AlignedCharArrayUnion<V1>));
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EXPECT_EQ(sizeof(V2), sizeof(AlignedCharArrayUnion<V2>));
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EXPECT_EQ(sizeof(V3), sizeof(AlignedCharArrayUnion<V3>));
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EXPECT_EQ(sizeof(V4), sizeof(AlignedCharArrayUnion<V4>));
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EXPECT_EQ(sizeof(V5), sizeof(AlignedCharArrayUnion<V5>));
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EXPECT_EQ(sizeof(V6), sizeof(AlignedCharArrayUnion<V6>));
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EXPECT_EQ(sizeof(V7), sizeof(AlignedCharArrayUnion<V7>));
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// Some versions of MSVC also get this wrong. The failure again appears to be
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// benign: sizeof(V8) is only 52 bytes, but our array reserves 56.
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#ifndef _MSC_VER
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EXPECT_EQ(sizeof(V8), sizeof(AlignedCharArrayUnion<V8>));
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#endif
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EXPECT_EQ(1u, (alignOf<AlignedCharArray<1, 1> >()));
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EXPECT_EQ(2u, (alignOf<AlignedCharArray<2, 1> >()));
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EXPECT_EQ(4u, (alignOf<AlignedCharArray<4, 1> >()));
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EXPECT_EQ(8u, (alignOf<AlignedCharArray<8, 1> >()));
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EXPECT_EQ(16u, (alignOf<AlignedCharArray<16, 1> >()));
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EXPECT_EQ(1u, sizeof(AlignedCharArray<1, 1>));
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EXPECT_EQ(7u, sizeof(AlignedCharArray<1, 7>));
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EXPECT_EQ(2u, sizeof(AlignedCharArray<2, 2>));
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EXPECT_EQ(16u, sizeof(AlignedCharArray<2, 16>));
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}
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}
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