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/* PR middle-end/81824 - Warn for missing attributes with function aliases
Exercise attribute copy for types.
{ dg-do compile }
{ dg-options "-O2 -Wall -ftrack-macro-expansion=0" } */
#define Assert(expr) typedef char AssertExpr[2 * !!(expr) - 1]
#define ATTR(list) __attribute__ (list)
/* Use attribute packed to verify that type attributes are copied
from one type to another. */
struct ATTR ((packed)) PackedA { int i; char c; };
Assert (__alignof (struct PackedA) == 1);
struct ATTR ((copy ((struct PackedA*)0))) PackedB { long i; char c; };
Assert (__alignof (struct PackedA) == __alignof (struct PackedB));
struct PackedMember
{
char c;
ATTR ((copy ((struct PackedB*)0))) double packed_mem;
/* { dg-warning "attribute ignored" "" { target default_packed } .-1 } */
};
Assert (__alignof (struct PackedMember) == 1);
extern const struct PackedA packed;
struct Unpacked { int i; char c; };
Assert (__alignof (struct Unpacked) > 1);
/* { dg-error "size of array .* is negative" "" { target default_packed } .-1 } */
/* Verify that copying the packed attribute to the declaration
of an object is ignored with a warning. (There should be
a way to copy just the subset of attributes from a type that
aren't ignored and won't cause a warning, maybe via attribute
copy_except or something like that.) */
extern ATTR ((copy ((struct PackedA*)0))) const struct Unpacked
unpacked; /* { dg-warning ".packed. attribute ignored" } */
Assert (__alignof (packed) == 1);
Assert (__alignof (unpacked) == __alignof (struct Unpacked));
/* Verify that attribute deprecated isn't copied (but referencing
the deprecated type in the copy attribute still triggers a warning). */
struct ATTR ((aligned (8), deprecated))
AlignedDeprecated { char c; };
struct ATTR ((copy ((struct AlignedDeprecated *)0))) /* { dg-warning "\\\[-Wdeprecated-declarations]" } */
AlignedCopy { short s; };
Assert (__alignof (struct AlignedCopy) == 8);
struct AlignedCopy aligned_copy;
Assert (__alignof (aligned_copy) == 8);
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