forked from OSchip/llvm-project
162 lines
4.5 KiB
C
162 lines
4.5 KiB
C
// RUN: %clang_cc1 %s -fsyntax-only -verify
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// RUN: %clang_cc1 %s -fsyntax-only -triple=x86_64-windows-coff -verify
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// Packed structs.
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struct s {
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char a;
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int b __attribute__((packed));
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char c;
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int d;
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};
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extern int a1[sizeof(struct s) == 12 ? 1 : -1];
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extern int a2[__alignof(struct s) == 4 ? 1 : -1];
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struct __attribute__((packed)) packed_s {
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char a;
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int b __attribute__((packed));
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char c;
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int d;
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};
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extern int b1[sizeof(struct packed_s) == 10 ? 1 : -1];
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extern int b2[__alignof(struct packed_s) == 1 ? 1 : -1];
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struct fas {
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char a;
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int b[];
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};
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extern int c1[sizeof(struct fas) == 4 ? 1 : -1];
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extern int c2[__alignof(struct fas) == 4 ? 1 : -1];
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struct __attribute__((packed)) packed_fas {
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char a;
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int b[];
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};
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extern int d1[sizeof(struct packed_fas) == 1 ? 1 : -1];
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extern int d2[__alignof(struct packed_fas) == 1 ? 1 : -1];
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struct packed_after_fas {
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char a;
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int b[];
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} __attribute__((packed));
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extern int d1_2[sizeof(struct packed_after_fas) == 1 ? 1 : -1];
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extern int d2_2[__alignof(struct packed_after_fas) == 1 ? 1 : -1];
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// Alignment
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struct __attribute__((aligned(8))) as1 {
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char c;
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};
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extern int e1[sizeof(struct as1) == 8 ? 1 : -1];
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extern int e2[__alignof(struct as1) == 8 ? 1 : -1];
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struct __attribute__((aligned)) as1_2 {
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char c;
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};
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#ifdef __s390x__
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extern int e1_2[sizeof(struct as1_2) == 8 ? 1 : -1];
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extern int e2_2[__alignof(struct as1_2) == 8 ? 1 : -1];
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#else
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extern int e1_2[sizeof(struct as1_2) == 16 ? 1 : -1];
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extern int e2_2[__alignof(struct as1_2) == 16 ? 1 : -1];
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#endif
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struct as2 {
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char c;
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int __attribute__((aligned(8))) a;
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};
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extern int f1[sizeof(struct as2) == 16 ? 1 : -1];
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extern int f2[__alignof(struct as2) == 8 ? 1 : -1];
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struct __attribute__((packed)) as3 {
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char c;
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int a;
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int __attribute__((aligned(8))) b;
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};
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extern int g1[sizeof(struct as3) == 16 ? 1 : -1];
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extern int g2[__alignof(struct as3) == 8 ? 1 : -1];
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// rdar://5921025
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struct packedtest {
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int ted_likes_cheese;
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void *args[] __attribute__((packed));
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};
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// Packed union
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union __attribute__((packed)) au4 {char c; int x;};
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extern int h1[sizeof(union au4) == 4 ? 1 : -1];
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extern int h2[__alignof(union au4) == 1 ? 1 : -1];
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// Aligned union
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union au5 {__attribute__((aligned(4))) char c;};
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extern int h1[sizeof(union au5) == 4 ? 1 : -1];
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extern int h2[__alignof(union au5) == 4 ? 1 : -1];
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// Alignment+packed
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struct as6 {char c; __attribute__((packed, aligned(2))) int x;};
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extern int i1[sizeof(struct as6) == 6 ? 1 : -1];
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extern int i2[__alignof(struct as6) == 2 ? 1 : -1];
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union au6 {char c; __attribute__((packed, aligned(2))) int x;};
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extern int k1[sizeof(union au6) == 4 ? 1 : -1];
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extern int k2[__alignof(union au6) == 2 ? 1 : -1];
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// Check postfix attributes
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union au7 {char c; int x;} __attribute__((packed));
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extern int l1[sizeof(union au7) == 4 ? 1 : -1];
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extern int l2[__alignof(union au7) == 1 ? 1 : -1];
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struct packed_fas2 {
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char a;
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int b[];
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} __attribute__((packed));
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extern int m1[sizeof(struct packed_fas2) == 1 ? 1 : -1];
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extern int m2[__alignof(struct packed_fas2) == 1 ? 1 : -1];
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// Attribute aligned can round down typedefs. PR9253
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typedef long long __attribute__((aligned(1))) nt;
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struct nS {
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char buf_nr;
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nt start_lba;
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};
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#if defined(_WIN32) && !defined(__declspec) // _MSC_VER is unavailable in cc1.
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// Alignment doesn't affect packing in MS mode.
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extern int n1[sizeof(struct nS) == 16 ? 1 : -1];
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extern int n2[__alignof(struct nS) == 8 ? 1 : -1];
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#else
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extern int n1[sizeof(struct nS) == 9 ? 1 : -1];
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extern int n2[__alignof(struct nS) == 1 ? 1 : -1];
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#endif
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// Packed attribute shouldn't be ignored for bit-field of char types.
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// Note from GCC reference manual: The 4.1, 4.2 and 4.3 series of GCC ignore
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// the packed attribute on bit-fields of type char. This has been fixed in
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// GCC 4.4 but the change can lead to differences in the structure layout.
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// See the documentation of -Wpacked-bitfield-compat for more information.
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struct packed_chars {
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char a:4;
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char b:8 __attribute__ ((packed));
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// expected-warning@-1 {{'packed' attribute was ignored on bit-fields with single-byte alignment in older versions of GCC and Clang}}
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char c:4;
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};
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#if defined(_WIN32) && !defined(__declspec) // _MSC_VER is unavailable in cc1.
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// On Windows clang uses MSVC compatible layout in this case.
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extern int o1[sizeof(struct packed_chars) == 3 ? 1 : -1];
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extern int o2[__alignof(struct packed_chars) == 1 ? 1 : -1];
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#else
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extern int o1[sizeof(struct packed_chars) == 2 ? 1 : -1];
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extern int o2[__alignof(struct packed_chars) == 1 ? 1 : -1];
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#endif
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