1// RUN: %clang_cc1 -std=c++11 -triple x86_64-linux-gnu -verify %s 2 3alignas(1) int n1; // expected-error {{requested alignment is less than minimum alignment of 4 for type 'int'}} 4alignas(1) alignas(2) int n2; // expected-error {{less than minimum alignment}} 5alignas(1) alignas(2) alignas(4) int n3; // ok 6alignas(1) alignas(2) alignas(0) int n4; // expected-error {{less than minimum alignment}} 7alignas(1) alignas(2) int n5 alignas(4); // ok 8alignas(1) alignas(4) int n6 alignas(2); // ok 9alignas(1) int n7 alignas(2), // expected-error {{less than minimum alignment}} 10 n8 alignas(4); // ok 11alignas(8) int n9 alignas(2); // ok, overaligned 12 13enum alignas(1) E1 {}; // expected-error {{requested alignment is less than minimum alignment of 4 for type 'E1'}} 14enum alignas(1) E2 : char {}; // ok 15enum alignas(4) E3 { e3 = 0 }; // ok 16enum alignas(4) E4 { e4 = 1ull << 33 }; // expected-error {{requested alignment is less than minimum alignment of 8 for type 'E4'}} 17 18struct S1 { 19 alignas(8) int n; 20}; 21struct alignas(2) S2 { // expected-error {{requested alignment is less than minimum alignment of 4 for type 'S2'}} 22 int n; 23}; 24struct alignas(2) S3 { // expected-error {{requested alignment is less than minimum alignment of 8 for type 'S3'}} 25 S1 s1; 26}; 27struct alignas(2) S4 : S1 { // expected-error {{requested alignment is less than minimum alignment of 8 for type 'S4'}} 28}; 29struct S5 : S1 { 30 alignas(2) S1 s1; // expected-error {{requested alignment is less than minimum alignment of 8 for type 'S1'}} 31}; 32struct S6 { 33 S1 s1; 34}; 35struct S7 : S1 { 36}; 37struct alignas(2) alignas(8) alignas(1) S8 : S1 { 38}; 39 40S1 s1 alignas(4); // expected-error {{requested alignment is less than minimum alignment of 8 for type 'S1'}} 41S6 s6 alignas(4); // expected-error {{requested alignment is less than minimum alignment of 8 for type 'S6'}} 42S7 s7 alignas(4); // expected-error {{requested alignment is less than minimum alignment of 8 for type 'S7'}} 43 44template<int N, int M, typename T> 45struct alignas(N) X { // expected-error 3{{requested alignment is less than minimum}} 46 alignas(M) T t; // expected-error 3{{requested alignment is less than minimum}} 47}; 48 49template struct X<1, 1, char>; 50template struct X<4, 1, char>; 51template struct X<1, 2, char>; // expected-note {{instantiation}} 52template struct X<1, 1, short>; // expected-note {{instantiation}} 53template struct X<2, 1, short>; // expected-note {{instantiation}} 54template struct X<2, 2, short>; 55template struct X<16, 8, S1>; 56template struct X<4, 4, S1>; // expected-note {{instantiation}} 57 58template<int N, typename T> 59struct Y { 60 enum alignas(N) E : T {}; // expected-error {{requested alignment is less than minimum}} 61}; 62template struct Y<1, char>; 63template struct Y<2, char>; 64template struct Y<1, short>; // expected-note {{instantiation}} 65template struct Y<2, short>; 66 67template<int N, typename T> 68void f() { 69 alignas(N) T v; // expected-error {{requested alignment is less than minimum}} 70}; 71template void f<1, char>(); 72template void f<2, char>(); 73template void f<1, short>(); // expected-note {{instantiation}} 74template void f<2, short>(); 75