66 lines · cpp
1// RUN: %clang_cc1 -std=c++11 -triple x86_64-linux-gnu -verify %s2 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; // ok6alignas(1) alignas(2) alignas(0) int n4; // expected-error {{less than minimum alignment}}7alignas(1) alignas(2) int n5 alignas(4); // ok8alignas(1) alignas(4) int n6 alignas(2); // ok9alignas(1) int n7 alignas(2), // expected-error {{less than minimum alignment}}10 n8 alignas(4); // ok11alignas(8) int n9 alignas(2); // ok, overaligned12alignas(1) extern int n10; // expected-error {{less than minimum alignment}}13 14typedef __attribute__((aligned(16))) int IntAlign16;15enum E6 : IntAlign16 {};16static_assert(alignof(E6) == 4, "");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>59void f() {60 alignas(N) T v; // expected-error {{requested alignment is less than minimum}}61};62template void f<1, char>();63template void f<2, char>();64template void f<1, short>(); // expected-note {{instantiation}}65template void f<2, short>();66