82 lines
3.3 KiB
C++
82 lines
3.3 KiB
C++
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// RUN: %clang_cc1 -std=c++11 -triple x86_64-linux-gnu -verify %s
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alignas(1) int n1; // expected-error {{requested alignment is less than minimum alignment of 4 for type 'int'}}
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alignas(1) alignas(2) int n2; // expected-error {{less than minimum alignment}}
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alignas(1) alignas(2) alignas(4) int n3; // ok
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alignas(1) alignas(2) alignas(0) int n4; // expected-error {{less than minimum alignment}}
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alignas(1) alignas(2) int n5 alignas(4); // ok
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alignas(1) alignas(4) int n6 alignas(2); // ok
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alignas(1) int n7 alignas(2), // expected-error {{less than minimum alignment}}
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n8 alignas(4); // ok
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alignas(8) int n9 alignas(2); // ok, overaligned
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alignas(1) extern int n10; // expected-error {{less than minimum alignment}}
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enum alignas(1) E1 {}; // expected-error {{requested alignment is less than minimum alignment of 4 for type 'E1'}}
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enum alignas(1) E2 : char {}; // ok
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enum alignas(4) E3 { e3 = 0 }; // ok
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enum alignas(4) E4 { e4 = 1ull << 33 }; // expected-error {{requested alignment is less than minimum alignment of 8 for type 'E4'}}
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enum alignas(8) E5 {};
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static_assert(alignof(E5) == 8, "");
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typedef __attribute__((aligned(16))) int IntAlign16;
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enum E6 : IntAlign16 {};
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static_assert(alignof(E6) == 4, "");
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struct S1 {
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alignas(8) int n;
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};
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struct alignas(2) S2 { // expected-error {{requested alignment is less than minimum alignment of 4 for type 'S2'}}
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int n;
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};
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struct alignas(2) S3 { // expected-error {{requested alignment is less than minimum alignment of 8 for type 'S3'}}
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S1 s1;
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};
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struct alignas(2) S4 : S1 { // expected-error {{requested alignment is less than minimum alignment of 8 for type 'S4'}}
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};
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struct S5 : S1 {
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alignas(2) S1 s1; // expected-error {{requested alignment is less than minimum alignment of 8 for type 'S1'}}
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};
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struct S6 {
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S1 s1;
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};
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struct S7 : S1 {
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};
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struct alignas(2) alignas(8) alignas(1) S8 : S1 {
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};
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S1 s1 alignas(4); // expected-error {{requested alignment is less than minimum alignment of 8 for type 'S1'}}
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S6 s6 alignas(4); // expected-error {{requested alignment is less than minimum alignment of 8 for type 'S6'}}
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S7 s7 alignas(4); // expected-error {{requested alignment is less than minimum alignment of 8 for type 'S7'}}
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template<int N, int M, typename T>
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struct alignas(N) X { // expected-error 3{{requested alignment is less than minimum}}
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alignas(M) T t; // expected-error 3{{requested alignment is less than minimum}}
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};
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template struct X<1, 1, char>;
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template struct X<4, 1, char>;
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template struct X<1, 2, char>; // expected-note {{instantiation}}
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template struct X<1, 1, short>; // expected-note {{instantiation}}
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template struct X<2, 1, short>; // expected-note {{instantiation}}
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template struct X<2, 2, short>;
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template struct X<16, 8, S1>;
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template struct X<4, 4, S1>; // expected-note {{instantiation}}
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template<int N, typename T>
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struct Y {
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enum alignas(N) E : T {}; // expected-error {{requested alignment is less than minimum}}
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};
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template struct Y<1, char>;
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template struct Y<2, char>;
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template struct Y<1, short>; // expected-note {{instantiation}}
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template struct Y<2, short>;
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template<int N, typename T>
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void f() {
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alignas(N) T v; // expected-error {{requested alignment is less than minimum}}
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};
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template void f<1, char>();
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template void f<2, char>();
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template void f<1, short>(); // expected-note {{instantiation}}
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template void f<2, short>();
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