| //=== - llvm/unittest/Support/AlignOfTest.cpp - Alignment utility tests ---===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifdef _MSC_VER |
| // Disable warnings about alignment-based structure padding. |
| // This must be above the includes to suppress warnings in included templates. |
| #pragma warning(disable:4324) |
| #endif |
| |
| #include "llvm/Support/AlignOf.h" |
| #include "llvm/Support/Compiler.h" |
| #include "gtest/gtest.h" |
| |
| using namespace llvm; |
| |
| namespace { |
| // Disable warnings about questionable type definitions. |
| // We're testing that even questionable types work with the alignment utilities. |
| #ifdef _MSC_VER |
| #pragma warning(disable:4584) |
| #endif |
| |
| // Suppress direct base '{anonymous}::S1' inaccessible in '{anonymous}::D9' |
| // due to ambiguity warning. |
| #ifdef __clang__ |
| #pragma clang diagnostic ignored "-Wunknown-pragmas" |
| #pragma clang diagnostic ignored "-Winaccessible-base" |
| #elif ((__GNUC__ * 100) + __GNUC_MINOR__) >= 402 |
| // Pragma based warning suppression was introduced in GGC 4.2. Additionally |
| // this warning is "enabled by default". The warning still appears if -Wall is |
| // suppressed. Apparently GCC suppresses it when -w is specifed, which is odd. |
| #pragma GCC diagnostic warning "-w" |
| #endif |
| |
| // Define some fixed alignment types to use in these tests. |
| struct LLVM_ALIGNAS(1) A1 {}; |
| struct LLVM_ALIGNAS(2) A2 {}; |
| struct LLVM_ALIGNAS(4) A4 {}; |
| struct LLVM_ALIGNAS(8) A8 {}; |
| |
| struct S1 {}; |
| struct S2 { char a; }; |
| struct S3 { int x; }; |
| struct S4 { double y; }; |
| struct S5 { A1 a1; A2 a2; A4 a4; A8 a8; }; |
| struct S6 { double f(); }; |
| struct D1 : S1 {}; |
| struct D2 : S6 { float g(); }; |
| struct D3 : S2 {}; |
| struct D4 : S2 { int x; }; |
| struct D5 : S3 { char c; }; |
| struct D6 : S2, S3 {}; |
| struct D7 : S1, S3 {}; |
| struct D8 : S1, D4, D5 { double x[2]; }; |
| struct D9 : S1, D1 { S1 s1; }; |
| struct V1 { virtual ~V1(); }; |
| struct V2 { int x; virtual ~V2(); }; |
| struct V3 : V1 { |
| ~V3() override; |
| }; |
| struct V4 : virtual V2 { int y; |
| ~V4() override; |
| }; |
| struct V5 : V4, V3 { double z; |
| ~V5() override; |
| }; |
| struct V6 : S1 { virtual ~V6(); }; |
| struct V7 : virtual V2, virtual V6 { |
| ~V7() override; |
| }; |
| struct V8 : V5, virtual V6, V7 { double zz; |
| ~V8() override; |
| }; |
| |
| double S6::f() { return 0.0; } |
| float D2::g() { return 0.0f; } |
| V1::~V1() {} |
| V2::~V2() {} |
| V3::~V3() {} |
| V4::~V4() {} |
| V5::~V5() {} |
| V6::~V6() {} |
| V7::~V7() {} |
| V8::~V8() {} |
| |
| template <typename M> struct T { M m; }; |
| |
| TEST(AlignOfTest, BasicAlignedArray) { |
| EXPECT_LE(1u, alignof(AlignedCharArrayUnion<A1>)); |
| EXPECT_LE(2u, alignof(AlignedCharArrayUnion<A2>)); |
| EXPECT_LE(4u, alignof(AlignedCharArrayUnion<A4>)); |
| EXPECT_LE(8u, alignof(AlignedCharArrayUnion<A8>)); |
| |
| EXPECT_LE(1u, sizeof(AlignedCharArrayUnion<A1>)); |
| EXPECT_LE(2u, sizeof(AlignedCharArrayUnion<A2>)); |
| EXPECT_LE(4u, sizeof(AlignedCharArrayUnion<A4>)); |
| EXPECT_LE(8u, sizeof(AlignedCharArrayUnion<A8>)); |
| |
| EXPECT_EQ(1u, (alignof(AlignedCharArrayUnion<A1>))); |
| EXPECT_EQ(2u, (alignof(AlignedCharArrayUnion<A1, A2>))); |
| EXPECT_EQ(4u, (alignof(AlignedCharArrayUnion<A1, A2, A4>))); |
| EXPECT_EQ(8u, (alignof(AlignedCharArrayUnion<A1, A2, A4, A8>))); |
| |
| EXPECT_EQ(1u, sizeof(AlignedCharArrayUnion<A1>)); |
| EXPECT_EQ(2u, sizeof(AlignedCharArrayUnion<A1, A2>)); |
| EXPECT_EQ(4u, sizeof(AlignedCharArrayUnion<A1, A2, A4>)); |
| EXPECT_EQ(8u, sizeof(AlignedCharArrayUnion<A1, A2, A4, A8>)); |
| |
| EXPECT_EQ(1u, (alignof(AlignedCharArrayUnion<A1[1]>))); |
| EXPECT_EQ(2u, (alignof(AlignedCharArrayUnion<A1[2], A2[1]>))); |
| EXPECT_EQ(4u, (alignof(AlignedCharArrayUnion<A1[42], A2[55], A4[13]>))); |
| EXPECT_EQ(8u, (alignof(AlignedCharArrayUnion<A1[2], A2[1], A4, A8>))); |
| |
| EXPECT_EQ(1u, sizeof(AlignedCharArrayUnion<A1[1]>)); |
| EXPECT_EQ(2u, sizeof(AlignedCharArrayUnion<A1[2], A2[1]>)); |
| EXPECT_EQ(4u, sizeof(AlignedCharArrayUnion<A1[3], A2[2], A4>)); |
| EXPECT_EQ(16u, sizeof(AlignedCharArrayUnion<A1, A2[3], |
| A4[3], A8>)); |
| |
| // For other tests we simply assert that the alignment of the union mathes |
| // that of the fundamental type and hope that we have any weird type |
| // productions that would trigger bugs. |
| EXPECT_EQ(alignof(T<char>), alignof(AlignedCharArrayUnion<char>)); |
| EXPECT_EQ(alignof(T<short>), alignof(AlignedCharArrayUnion<short>)); |
| EXPECT_EQ(alignof(T<int>), alignof(AlignedCharArrayUnion<int>)); |
| EXPECT_EQ(alignof(T<long>), alignof(AlignedCharArrayUnion<long>)); |
| EXPECT_EQ(alignof(T<long long>), alignof(AlignedCharArrayUnion<long long>)); |
| EXPECT_EQ(alignof(T<float>), alignof(AlignedCharArrayUnion<float>)); |
| EXPECT_EQ(alignof(T<double>), alignof(AlignedCharArrayUnion<double>)); |
| EXPECT_EQ(alignof(T<long double>), |
| alignof(AlignedCharArrayUnion<long double>)); |
| EXPECT_EQ(alignof(T<void *>), alignof(AlignedCharArrayUnion<void *>)); |
| EXPECT_EQ(alignof(T<int *>), alignof(AlignedCharArrayUnion<int *>)); |
| EXPECT_EQ(alignof(T<double (*)(double)>), |
| alignof(AlignedCharArrayUnion<double (*)(double)>)); |
| EXPECT_EQ(alignof(T<double (S6::*)()>), |
| alignof(AlignedCharArrayUnion<double (S6::*)()>)); |
| EXPECT_EQ(alignof(S1), alignof(AlignedCharArrayUnion<S1>)); |
| EXPECT_EQ(alignof(S2), alignof(AlignedCharArrayUnion<S2>)); |
| EXPECT_EQ(alignof(S3), alignof(AlignedCharArrayUnion<S3>)); |
| EXPECT_EQ(alignof(S4), alignof(AlignedCharArrayUnion<S4>)); |
| EXPECT_EQ(alignof(S5), alignof(AlignedCharArrayUnion<S5>)); |
| EXPECT_EQ(alignof(S6), alignof(AlignedCharArrayUnion<S6>)); |
| EXPECT_EQ(alignof(D1), alignof(AlignedCharArrayUnion<D1>)); |
| EXPECT_EQ(alignof(D2), alignof(AlignedCharArrayUnion<D2>)); |
| EXPECT_EQ(alignof(D3), alignof(AlignedCharArrayUnion<D3>)); |
| EXPECT_EQ(alignof(D4), alignof(AlignedCharArrayUnion<D4>)); |
| EXPECT_EQ(alignof(D5), alignof(AlignedCharArrayUnion<D5>)); |
| EXPECT_EQ(alignof(D6), alignof(AlignedCharArrayUnion<D6>)); |
| EXPECT_EQ(alignof(D7), alignof(AlignedCharArrayUnion<D7>)); |
| EXPECT_EQ(alignof(D8), alignof(AlignedCharArrayUnion<D8>)); |
| EXPECT_EQ(alignof(D9), alignof(AlignedCharArrayUnion<D9>)); |
| EXPECT_EQ(alignof(V1), alignof(AlignedCharArrayUnion<V1>)); |
| EXPECT_EQ(alignof(V2), alignof(AlignedCharArrayUnion<V2>)); |
| EXPECT_EQ(alignof(V3), alignof(AlignedCharArrayUnion<V3>)); |
| EXPECT_EQ(alignof(V4), alignof(AlignedCharArrayUnion<V4>)); |
| EXPECT_EQ(alignof(V5), alignof(AlignedCharArrayUnion<V5>)); |
| EXPECT_EQ(alignof(V6), alignof(AlignedCharArrayUnion<V6>)); |
| EXPECT_EQ(alignof(V7), alignof(AlignedCharArrayUnion<V7>)); |
| |
| // Some versions of MSVC get this wrong somewhat disturbingly. The failure |
| // appears to be benign: alignof(V8) produces a preposterous value: 12 |
| #ifndef _MSC_VER |
| EXPECT_EQ(alignof(V8), alignof(AlignedCharArrayUnion<V8>)); |
| #endif |
| |
| EXPECT_EQ(sizeof(char), sizeof(AlignedCharArrayUnion<char>)); |
| EXPECT_EQ(sizeof(char[1]), sizeof(AlignedCharArrayUnion<char[1]>)); |
| EXPECT_EQ(sizeof(char[2]), sizeof(AlignedCharArrayUnion<char[2]>)); |
| EXPECT_EQ(sizeof(char[3]), sizeof(AlignedCharArrayUnion<char[3]>)); |
| EXPECT_EQ(sizeof(char[4]), sizeof(AlignedCharArrayUnion<char[4]>)); |
| EXPECT_EQ(sizeof(char[5]), sizeof(AlignedCharArrayUnion<char[5]>)); |
| EXPECT_EQ(sizeof(char[8]), sizeof(AlignedCharArrayUnion<char[8]>)); |
| EXPECT_EQ(sizeof(char[13]), sizeof(AlignedCharArrayUnion<char[13]>)); |
| EXPECT_EQ(sizeof(char[16]), sizeof(AlignedCharArrayUnion<char[16]>)); |
| EXPECT_EQ(sizeof(char[21]), sizeof(AlignedCharArrayUnion<char[21]>)); |
| EXPECT_EQ(sizeof(char[32]), sizeof(AlignedCharArrayUnion<char[32]>)); |
| EXPECT_EQ(sizeof(short), sizeof(AlignedCharArrayUnion<short>)); |
| EXPECT_EQ(sizeof(int), sizeof(AlignedCharArrayUnion<int>)); |
| EXPECT_EQ(sizeof(long), sizeof(AlignedCharArrayUnion<long>)); |
| EXPECT_EQ(sizeof(long long), |
| sizeof(AlignedCharArrayUnion<long long>)); |
| EXPECT_EQ(sizeof(float), sizeof(AlignedCharArrayUnion<float>)); |
| EXPECT_EQ(sizeof(double), sizeof(AlignedCharArrayUnion<double>)); |
| EXPECT_EQ(sizeof(long double), |
| sizeof(AlignedCharArrayUnion<long double>)); |
| EXPECT_EQ(sizeof(void *), sizeof(AlignedCharArrayUnion<void *>)); |
| EXPECT_EQ(sizeof(int *), sizeof(AlignedCharArrayUnion<int *>)); |
| EXPECT_EQ(sizeof(double (*)(double)), |
| sizeof(AlignedCharArrayUnion<double (*)(double)>)); |
| EXPECT_EQ(sizeof(double (S6::*)()), |
| sizeof(AlignedCharArrayUnion<double (S6::*)()>)); |
| EXPECT_EQ(sizeof(S1), sizeof(AlignedCharArrayUnion<S1>)); |
| EXPECT_EQ(sizeof(S2), sizeof(AlignedCharArrayUnion<S2>)); |
| EXPECT_EQ(sizeof(S3), sizeof(AlignedCharArrayUnion<S3>)); |
| EXPECT_EQ(sizeof(S4), sizeof(AlignedCharArrayUnion<S4>)); |
| EXPECT_EQ(sizeof(S5), sizeof(AlignedCharArrayUnion<S5>)); |
| EXPECT_EQ(sizeof(S6), sizeof(AlignedCharArrayUnion<S6>)); |
| EXPECT_EQ(sizeof(D1), sizeof(AlignedCharArrayUnion<D1>)); |
| EXPECT_EQ(sizeof(D2), sizeof(AlignedCharArrayUnion<D2>)); |
| EXPECT_EQ(sizeof(D3), sizeof(AlignedCharArrayUnion<D3>)); |
| EXPECT_EQ(sizeof(D4), sizeof(AlignedCharArrayUnion<D4>)); |
| EXPECT_EQ(sizeof(D5), sizeof(AlignedCharArrayUnion<D5>)); |
| EXPECT_EQ(sizeof(D6), sizeof(AlignedCharArrayUnion<D6>)); |
| EXPECT_EQ(sizeof(D7), sizeof(AlignedCharArrayUnion<D7>)); |
| EXPECT_EQ(sizeof(D8), sizeof(AlignedCharArrayUnion<D8>)); |
| EXPECT_EQ(sizeof(D9), sizeof(AlignedCharArrayUnion<D9>)); |
| EXPECT_EQ(sizeof(D9[1]), sizeof(AlignedCharArrayUnion<D9[1]>)); |
| EXPECT_EQ(sizeof(D9[2]), sizeof(AlignedCharArrayUnion<D9[2]>)); |
| EXPECT_EQ(sizeof(D9[3]), sizeof(AlignedCharArrayUnion<D9[3]>)); |
| EXPECT_EQ(sizeof(D9[4]), sizeof(AlignedCharArrayUnion<D9[4]>)); |
| EXPECT_EQ(sizeof(D9[5]), sizeof(AlignedCharArrayUnion<D9[5]>)); |
| EXPECT_EQ(sizeof(D9[8]), sizeof(AlignedCharArrayUnion<D9[8]>)); |
| EXPECT_EQ(sizeof(D9[13]), sizeof(AlignedCharArrayUnion<D9[13]>)); |
| EXPECT_EQ(sizeof(D9[16]), sizeof(AlignedCharArrayUnion<D9[16]>)); |
| EXPECT_EQ(sizeof(D9[21]), sizeof(AlignedCharArrayUnion<D9[21]>)); |
| EXPECT_EQ(sizeof(D9[32]), sizeof(AlignedCharArrayUnion<D9[32]>)); |
| EXPECT_EQ(sizeof(V1), sizeof(AlignedCharArrayUnion<V1>)); |
| EXPECT_EQ(sizeof(V2), sizeof(AlignedCharArrayUnion<V2>)); |
| EXPECT_EQ(sizeof(V3), sizeof(AlignedCharArrayUnion<V3>)); |
| EXPECT_EQ(sizeof(V4), sizeof(AlignedCharArrayUnion<V4>)); |
| EXPECT_EQ(sizeof(V5), sizeof(AlignedCharArrayUnion<V5>)); |
| EXPECT_EQ(sizeof(V6), sizeof(AlignedCharArrayUnion<V6>)); |
| EXPECT_EQ(sizeof(V7), sizeof(AlignedCharArrayUnion<V7>)); |
| |
| // Some versions of MSVC also get this wrong. The failure again appears to be |
| // benign: sizeof(V8) is only 52 bytes, but our array reserves 56. |
| #ifndef _MSC_VER |
| EXPECT_EQ(sizeof(V8), sizeof(AlignedCharArrayUnion<V8>)); |
| #endif |
| |
| EXPECT_EQ(1u, (alignof(AlignedCharArray<1, 1>))); |
| EXPECT_EQ(2u, (alignof(AlignedCharArray<2, 1>))); |
| EXPECT_EQ(4u, (alignof(AlignedCharArray<4, 1>))); |
| EXPECT_EQ(8u, (alignof(AlignedCharArray<8, 1>))); |
| EXPECT_EQ(16u, (alignof(AlignedCharArray<16, 1>))); |
| |
| EXPECT_EQ(1u, sizeof(AlignedCharArray<1, 1>)); |
| EXPECT_EQ(7u, sizeof(AlignedCharArray<1, 7>)); |
| EXPECT_EQ(2u, sizeof(AlignedCharArray<2, 2>)); |
| EXPECT_EQ(16u, sizeof(AlignedCharArray<2, 16>)); |
| } |
| } // end anonymous namespace |