derek.holloway
7502bf64a4
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43 lines
1.9 KiB
C
43 lines
1.9 KiB
C
// RUN: %clang_cc1 -fsyntax-only -verify -std=c11 -Dalignof=__alignof %s
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// RUN: %clang_cc1 -fsyntax-only -verify -std=c11 -Dalignof=_Alignof -DUSING_C11_SYNTAX %s
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// RUN: %clang_cc1 -fsyntax-only -verify -std=c23 -DUSING_C11_SYNTAX %s
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_Alignas(3) int align_illegal; //expected-error {{requested alignment is not a power of 2}}
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_Alignas(int) char align_big;
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_Alignas(1) int align_small; // expected-error {{requested alignment is less than minimum}}
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_Alignas(1) unsigned _Alignas(8) int _Alignas(1) align_multiple;
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struct align_member {
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_Alignas(8) int member;
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_Alignas(1) char bitfield : 1; // expected-error {{'_Alignas' attribute cannot be applied to a bit-field}}
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};
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typedef _Alignas(8) char align_typedef; // expected-error {{'_Alignas' attribute only applies to variables and fields}}
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void f(_Alignas(1) char c) { // expected-error {{'_Alignas' attribute cannot be applied to a function parameter}}
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_Alignas(1) register char k; // expected-error {{'_Alignas' attribute cannot be applied to a variable with 'register' storage class}}
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}
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#ifdef USING_C11_SYNTAX
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// expected-warning-re@+4{{'{{(_A|a)}}lignof' applied to an expression is a GNU extension}}
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// expected-warning-re@+4{{'{{(_A|a)}}lignof' applied to an expression is a GNU extension}}
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// expected-warning-re@+4{{'{{(_A|a)}}lignof' applied to an expression is a GNU extension}}
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#endif
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_Static_assert(alignof(align_big) == alignof(int), "k's alignment is wrong");
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_Static_assert(alignof(align_small) == 1, "j's alignment is wrong");
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_Static_assert(alignof(align_multiple) == 8, "l's alignment is wrong");
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_Static_assert(alignof(struct align_member) == 8, "quuux's alignment is wrong");
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_Static_assert(sizeof(struct align_member) == 8, "quuux's size is wrong");
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struct GH95032_1 {
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_Alignas(16) char bytes[16];
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};
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_Static_assert(_Alignof(struct GH95032_1) == 16, "");
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#if __STDC_VERSION__ >= 202311L
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struct GH95032_2 {
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alignas(16) char bytes[16];
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};
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static_assert(alignof(struct GH95032_2) == 16);
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#endif
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