1*f4a2713aSLionel Sambuc // RUN: %clang_cc1 -fsyntax-only -verify -std=c11 -Dalignof=__alignof %s 2*f4a2713aSLionel Sambuc // RUN: %clang_cc1 -fsyntax-only -verify -std=c11 -Dalignof=_Alignof -DUSING_C11_SYNTAX %s 3*f4a2713aSLionel Sambuc 4*f4a2713aSLionel Sambuc _Alignas(3) int align_illegal; //expected-error {{requested alignment is not a power of 2}} 5*f4a2713aSLionel Sambuc _Alignas(int) char align_big; 6*f4a2713aSLionel Sambuc _Alignas(1) int align_small; // expected-error {{requested alignment is less than minimum}} 7*f4a2713aSLionel Sambuc _Alignas(1) unsigned _Alignas(8) int _Alignas(1) align_multiple; 8*f4a2713aSLionel Sambuc 9*f4a2713aSLionel Sambuc struct align_member { 10*f4a2713aSLionel Sambuc _Alignas(8) int member; 11*f4a2713aSLionel Sambuc _Alignas(1) char bitfield : 1; // expected-error {{'_Alignas' attribute cannot be applied to a bit-field}} 12*f4a2713aSLionel Sambuc }; 13*f4a2713aSLionel Sambuc 14*f4a2713aSLionel Sambuc typedef _Alignas(8) char align_typedef; // expected-error {{'_Alignas' attribute only applies to variables and fields}} 15*f4a2713aSLionel Sambuc f(char c)16*f4a2713aSLionel Sambucvoid f(_Alignas(1) char c) { // expected-error {{'_Alignas' attribute cannot be applied to a function parameter}} 17*f4a2713aSLionel Sambuc _Alignas(1) register char k; // expected-error {{'_Alignas' attribute cannot be applied to a variable with 'register' storage class}} 18*f4a2713aSLionel Sambuc } 19*f4a2713aSLionel Sambuc 20*f4a2713aSLionel Sambuc #ifdef USING_C11_SYNTAX 21*f4a2713aSLionel Sambuc // expected-warning@+4{{'_Alignof' applied to an expression is a GNU extension}} 22*f4a2713aSLionel Sambuc // expected-warning@+4{{'_Alignof' applied to an expression is a GNU extension}} 23*f4a2713aSLionel Sambuc // expected-warning@+4{{'_Alignof' applied to an expression is a GNU extension}} 24*f4a2713aSLionel Sambuc #endif 25*f4a2713aSLionel Sambuc _Static_assert(alignof(align_big) == alignof(int), "k's alignment is wrong"); 26*f4a2713aSLionel Sambuc _Static_assert(alignof(align_small) == 1, "j's alignment is wrong"); 27*f4a2713aSLionel Sambuc _Static_assert(alignof(align_multiple) == 8, "l's alignment is wrong"); 28*f4a2713aSLionel Sambuc _Static_assert(alignof(struct align_member) == 8, "quuux's alignment is wrong"); 29*f4a2713aSLionel Sambuc _Static_assert(sizeof(struct align_member) == 8, "quuux's size is wrong"); 30