derek.holloway
7502bf64a4
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63 lines
2.6 KiB
C++
63 lines
2.6 KiB
C++
// RUN: %clang_cc1 -std=c++11 -verify %s
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alignas(4) extern int n1; // expected-note {{previous declaration}}
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alignas(8) int n1; // expected-error {{redeclaration has different alignment requirement (8 vs 4)}}
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alignas(8) int n2; // expected-note {{previous declaration}}
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alignas(4) extern int n2; // expected-error {{different alignment requirement (4 vs 8)}}
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alignas(8) extern int n3; // expected-note {{previous declaration}}
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alignas(4) extern int n3; // expected-error {{different alignment requirement (4 vs 8)}}
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extern int n4;
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alignas(8) extern int n4;
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alignas(8) extern int n5;
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extern int n5;
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int n6; // expected-error {{'alignas' must be specified on definition if it is specified on any declaration}}
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alignas(8) extern int n6; // expected-note {{declared with 'alignas' attribute here}}
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extern int n7;
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alignas(8) int n7;
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alignas(8) extern int n8; // expected-note {{declared with 'alignas' attribute here}}
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int n8; // expected-error {{'alignas' must be specified on definition if it is specified on any declaration}}
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int n9; // expected-error {{'alignas' must be specified on definition if it is specified on any declaration}}
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alignas(4) extern int n9; // expected-note {{declared with 'alignas' attribute here}}
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struct S;
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struct alignas(16) S; // expected-note {{declared with 'alignas' attribute here}}
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struct S;
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struct S { int n; }; // expected-error {{'alignas' must be specified on definition if it is specified on any declaration}}
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struct alignas(2) T;
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struct alignas(2) T { char c; }; // expected-note {{previous declaration is here}}
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struct T;
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struct alignas(4) T; // expected-error {{redeclaration has different alignment requirement (4 vs 2)}}
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struct U;
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struct alignas(2) U {};
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struct V {}; // expected-error {{'alignas' must be specified on definition if it is specified on any declaration}}
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struct alignas(1) V; // expected-note {{declared with 'alignas' attribute here}}
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template<int M, int N> struct alignas(M) W;
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template<int M, int N> struct alignas(N) W {};
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W<4,4> w44; // ok
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// FIXME: We should reject this.
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W<1,2> w12;
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static_assert(alignof(W<4,4>) == 4, "");
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template<int M, int N, int O, int P> struct X {
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alignas(M) alignas(N) static char Buffer[32]; // expected-note {{previous declaration is here}}
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};
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template<int M, int N, int O, int P>
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alignas(O) alignas(P) char X<M, N, O, P>::Buffer[32]; // expected-error {{redeclaration has different alignment requirement (8 vs 2)}}
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char *x1848 = X<1,8,4,8>::Buffer; // ok
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char *x1248 = X<1,2,4,8>::Buffer; // expected-note {{in instantiation of}}
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// Don't crash here.
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alignas(4) struct Incomplete incomplete; // expected-error {{incomplete type}} expected-note {{forward declaration}}
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