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llvm-project/clang/test/Layout/aix-double-struct-member.cpp

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// RUN: %clang_cc1 -triple powerpc-ibm-aix-xcoff -fdump-record-layouts \
// RUN: -fsyntax-only -fxl-pragma-pack %s | \
// RUN: FileCheck %s
// RUN: %clang_cc1 -triple powerpc64-ibm-aix-xcoff -fdump-record-layouts \
// RUN: -fsyntax-only -fxl-pragma-pack %s | \
// RUN: FileCheck %s
namespace test1 {
// Test the class layout when having a double which is/is not the first struct
// member.
struct D {
double d1;
int i1;
};
struct DoubleFirst {
struct D d2;
int i2;
};
struct IntFirst {
int i3;
struct D d3;
};
int a = sizeof(DoubleFirst);
int b = sizeof(IntFirst);
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test1::D
// CHECK-NEXT: 0 | double d1
// CHECK-NEXT: 8 | int i1
// CHECK-NEXT: | [sizeof=16, dsize=16, align=4, preferredalign=8,
// CHECK-NEXT: | nvsize=16, nvalign=4, preferrednvalign=8]
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test1::DoubleFirst
// CHECK-NEXT: 0 | struct test1::D d2
// CHECK-NEXT: 0 | double d1
// CHECK-NEXT: 8 | int i1
// CHECK-NEXT: 16 | int i2
// CHECK-NEXT: | [sizeof=24, dsize=24, align=4, preferredalign=8,
// CHECK-NEXT: | nvsize=24, nvalign=4, preferrednvalign=8]
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test1::IntFirst
// CHECK-NEXT: 0 | int i3
// CHECK-NEXT: 4 | struct test1::D d3
// CHECK-NEXT: 4 | double d1
// CHECK-NEXT: 12 | int i1
// CHECK-NEXT: | [sizeof=20, dsize=20, align=4, preferredalign=4,
// CHECK-NEXT: | nvsize=20, nvalign=4, preferrednvalign=4]
} // namespace test1
namespace test2 {
// Test the class layout when having a zero-sized bitfield followed by double.
struct Double {
int : 0;
double d;
};
int a = sizeof(Double);
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test2::Double
// CHECK-NEXT: 0:- | int
// CHECK-NEXT: 0 | double d
// CHECK-NEXT: | [sizeof=8, dsize=8, align=4, preferredalign=4,
// CHECK-NEXT: | nvsize=8, nvalign=4, preferrednvalign=4]
} // namespace test2
namespace test3 {
// Test the class layout when having a double member in union.
union A {
int b;
double d;
};
struct UnionStruct {
union A a;
int i;
};
int a = sizeof(UnionStruct);
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | union test3::A
// CHECK-NEXT: 0 | int b
// CHECK-NEXT: 0 | double d
// CHECK-NEXT: | [sizeof=8, dsize=8, align=4, preferredalign=8,
// CHECK-NEXT: | nvsize=8, nvalign=4, preferrednvalign=8]
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test3::UnionStruct
// CHECK-NEXT: 0 | union test3::A a
// CHECK-NEXT: 0 | int b
// CHECK-NEXT: 0 | double d
// CHECK-NEXT: 8 | int i
// CHECK-NEXT: | [sizeof=16, dsize=16, align=4, preferredalign=8,
// CHECK-NEXT: | nvsize=16, nvalign=4, preferrednvalign=8]
} // namespace test3
namespace test4 {
// Test the class layout when having multiple base classes.
struct A {
int a;
};
struct B {
double d;
};
class S : A, B {
};
int a = sizeof(S);
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test4::A
// CHECK-NEXT: 0 | int a
// CHECK-NEXT: | [sizeof=4, dsize=4, align=4, preferredalign=4,
// CHECK-NEXT: | nvsize=4, nvalign=4, preferrednvalign=4]
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test4::B
// CHECK-NEXT: 0 | double d
// CHECK-NEXT: | [sizeof=8, dsize=8, align=4, preferredalign=8,
// CHECK-NEXT: | nvsize=8, nvalign=4, preferrednvalign=8]
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | class test4::S
// CHECK-NEXT: 0 | struct test4::A (base)
// CHECK-NEXT: 0 | int a
// CHECK-NEXT: 4 | struct test4::B (base)
// CHECK-NEXT: 4 | double d
// CHECK-NEXT: | [sizeof=12, dsize=12, align=4, preferredalign=4,
// CHECK-NEXT: | nvsize=12, nvalign=4, preferrednvalign=4]
} // namespace test4
namespace test5 {
struct Empty {
};
struct EmptyDer : Empty {
double d;
};
struct NonEmpty {
int i;
};
struct NonEmptyDer : NonEmpty {
double d;
};
int a = sizeof(EmptyDer);
int b = sizeof(NonEmptyDer);
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test5::Empty (empty)
// CHECK-NEXT: | [sizeof=1, dsize=1, align=1, preferredalign=1,
// CHECK-NEXT: | nvsize=1, nvalign=1, preferrednvalign=1]
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test5::EmptyDer
// CHECK-NEXT: 0 | struct test5::Empty (base) (empty)
// CHECK-NEXT: 0 | double d
// CHECK-NEXT: | [sizeof=8, dsize=8, align=4, preferredalign=8,
// CHECK-NEXT: | nvsize=8, nvalign=4, preferrednvalign=8]
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test5::NonEmpty
// CHECK-NEXT: 0 | int i
// CHECK-NEXT: | [sizeof=4, dsize=4, align=4, preferredalign=4,
// CHECK-NEXT: | nvsize=4, nvalign=4, preferrednvalign=4]
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test5::NonEmptyDer
// CHECK-NEXT: 0 | struct test5::NonEmpty (base)
// CHECK-NEXT: 0 | int i
// CHECK-NEXT: 4 | double d
// CHECK-NEXT: | [sizeof=12, dsize=12, align=4, preferredalign=4,
// CHECK-NEXT: | nvsize=12, nvalign=4, preferrednvalign=4]
} // namespace test5
namespace test6 {
struct A {
struct B {
double d[3];
} b;
};
int a = sizeof(A);
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test6::A::B
// CHECK-NEXT: 0 | double [3] d
// CHECK-NEXT: | [sizeof=24, dsize=24, align=4, preferredalign=8,
// CHECK-NEXT: | nvsize=24, nvalign=4, preferrednvalign=8]
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test6::A
// CHECK-NEXT: 0 | struct test6::A::B b
// CHECK-NEXT: 0 | double [3] d
// CHECK-NEXT: | [sizeof=24, dsize=24, align=4, preferredalign=8,
// CHECK-NEXT: | nvsize=24, nvalign=4, preferrednvalign=8]
} // namespace test6
namespace test7 {
struct A {
struct B {
long double _Complex d[3];
} b;
};
int a = sizeof(A);
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test7::A::B
// CHECK-NEXT: 0 | _Complex long double [3] d
// CHECK-NEXT: | [sizeof=48, dsize=48, align=4, preferredalign=8,
// CHECK-NEXT: | nvsize=48, nvalign=4, preferrednvalign=8]
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test7::A
// CHECK-NEXT: 0 | struct test7::A::B b
// CHECK-NEXT: 0 | _Complex long double [3] d
// CHECK-NEXT: | [sizeof=48, dsize=48, align=4, preferredalign=8,
// CHECK-NEXT: | nvsize=48, nvalign=4, preferrednvalign=8]
} // namespace test7
namespace test8 {
struct Emp {};
struct Y : Emp {
double d;
};
struct Z : Emp {
Y y;
};
int a = sizeof(Z);
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test8::Emp (empty)
// CHECK-NEXT: | [sizeof=1, dsize=1, align=1, preferredalign=1,
// CHECK-NEXT: | nvsize=1, nvalign=1, preferrednvalign=1]
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test8::Y
// CHECK-NEXT: 0 | struct test8::Emp (base) (empty)
// CHECK-NEXT: 0 | double d
// CHECK-NEXT: | [sizeof=8, dsize=8, align=4, preferredalign=8,
// CHECK-NEXT: | nvsize=8, nvalign=4, preferrednvalign=8]
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test8::Z
// CHECK-NEXT: 0 | struct test8::Emp (base) (empty)
// CHECK-NEXT: 8 | struct test8::Y y
// CHECK-NEXT: 8 | struct test8::Emp (base) (empty)
// CHECK-NEXT: 8 | double d
// CHECK-NEXT: | [sizeof=16, dsize=16, align=4, preferredalign=8,
// CHECK-NEXT: | nvsize=16, nvalign=4, preferrednvalign=8]
} // namespace test8
namespace test9 {
// Test the class layout when having a zero-extent array in a base class, which
// renders the base class not empty.
struct A { char zea[0]; };
struct B : A { double d; };
struct C { double d; };
struct D : A, C { char x; };
int a = sizeof(B);
int b = sizeof(D);
// CHECK: 0 | struct test9::B
// CHECK-NEXT: 0 | struct test9::A (base)
// CHECK-NEXT: 0 | char [0] zea
// CHECK-NEXT: 0 | double d
// CHECK-NEXT: | [sizeof=8, dsize=8, align=4, preferredalign=4,
// CHECK-NEXT: | nvsize=8, nvalign=4, preferrednvalign=4]
// CHECK: 0 | struct test9::D
// CHECK-NEXT: 0 | struct test9::A (base)
// CHECK-NEXT: 0 | char [0] zea
// CHECK-NEXT: 0 | struct test9::C (base)
// CHECK-NEXT: 0 | double d
// CHECK-NEXT: 8 | char x
// CHECK-NEXT: | [sizeof=12, dsize=9, align=4, preferredalign=4,
// CHECK-NEXT: | nvsize=9, nvalign=4, preferrednvalign=4]
} // namespace test9
namespace test10 {
struct A { double x; };
struct B : A {};
int a = sizeof(B);
// CHECK: 0 | struct test10::B
// CHECK-NEXT: 0 | struct test10::A (base)
// CHECK-NEXT: 0 | double x
// CHECK-NEXT: | [sizeof=8, dsize=8, align=4, preferredalign=8,
// CHECK-NEXT: | nvsize=8, nvalign=4, preferrednvalign=8]
} // namespace test10
namespace test11 {
// Test how #pragma pack and align attribute interacts with AIX `power`
// alignment rules.
struct A {
char a;
double __attribute__((aligned(16))) d;
int i;
};
struct B {
double __attribute__((aligned(4))) d1;
char a;
double d2;
};
#pragma pack(2)
struct C {
int i;
short j;
double k;
};
#pragma pack(pop)
#pragma pack(2)
struct D {
double d;
short j;
int i;
};
#pragma pack(pop)
#pragma pack(8)
struct E {
double __attribute__((aligned(4))) d;
short s;
};
#pragma pack(pop)
#pragma pack(4)
struct F : public D {
double d;
};
#pragma pack(pop)
#pragma pack(2)
struct G : public E {
int i;
};
#pragma pack(pop)
int a = sizeof(A);
int b = sizeof(B);
int c = sizeof(C);
int d = sizeof(D);
int e = sizeof(E);
int f = sizeof(F);
int g = sizeof(G);
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test11::A
// CHECK-NEXT: 0 | char a
// CHECK-NEXT: 16 | double d
// CHECK-NEXT: 24 | int i
// CHECK-NEXT: | [sizeof=32, dsize=32, align=16, preferredalign=16,
// CHECK-NEXT: | nvsize=32, nvalign=16, preferrednvalign=16]
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test11::B
// CHECK-NEXT: 0 | double d1
// CHECK-NEXT: 8 | char a
// CHECK-NEXT: 12 | double d2
// CHECK-NEXT: | [sizeof=24, dsize=24, align=4, preferredalign=8,
// CHECK-NEXT: | nvsize=24, nvalign=4, preferrednvalign=8]
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test11::C
// CHECK-NEXT: 0 | int i
// CHECK-NEXT: 4 | short j
// CHECK-NEXT: 6 | double k
// CHECK-NEXT: | [sizeof=14, dsize=14, align=2, preferredalign=2,
// CHECK-NEXT: | nvsize=14, nvalign=2, preferrednvalign=2]
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test11::D
// CHECK-NEXT: 0 | double d
// CHECK-NEXT: 8 | short j
// CHECK-NEXT: 10 | int i
// CHECK-NEXT: | [sizeof=14, dsize=14, align=2, preferredalign=2,
// CHECK-NEXT: | nvsize=14, nvalign=2, preferrednvalign=2]
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test11::E
// CHECK-NEXT: 0 | double d
// CHECK-NEXT: 8 | short s
// CHECK-NEXT: | [sizeof=16, dsize=16, align=4, preferredalign=8,
// CHECK-NEXT: | nvsize=16, nvalign=4, preferrednvalign=8]
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test11::F
// CHECK-NEXT: 0 | struct test11::D (base)
// CHECK-NEXT: 0 | double d
// CHECK-NEXT: 8 | short j
// CHECK-NEXT: 10 | int i
// CHECK-NEXT: 16 | double d
// CHECK-NEXT: | [sizeof=24, dsize=24, align=4, preferredalign=4,
// CHECK-NEXT: | nvsize=24, nvalign=4, preferrednvalign=4]
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct test11::G
// CHECK-NEXT: 0 | struct test11::E (base)
// CHECK-NEXT: 0 | double d
// CHECK-NEXT: 8 | short s
// CHECK-NEXT: 16 | int i
// CHECK-NEXT: | [sizeof=20, dsize=20, align=2, preferredalign=2,
// CHECK-NEXT: | nvsize=20, nvalign=2, preferrednvalign=2]
} // namespace test11
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