Should `typeof_unqual` remove [[gnu::aligned]] attribute on typedef's?

[fuhsnn]

https://godbolt.org/z/a1zjYMrY5

[[gnu::aligned]] typedef int T1;
[[gnu::aligned]] typedef int const T2;
[[gnu::aligned]] typedef int volatile T3;

__typeof_unqual(T1) i1; // 16-bytes aligned
__typeof_unqual(T2) i2; // 4-bytes aligned
__typeof_unqual(T3) i3; // 4-bytes aligned

Both GCC and Clang exhibit this inconsistency.
If the attribute is a qualifier it shouldn't survive typeof_unqual in i1, and if it isn't i2/i3 shouldn't drop it.

llvm/llvm-project#175733

[fuhsnn]

Also with other situations where qualifier removal is performed.

https://godbolt.org/z/9e5Pb66YW

[[gnu::aligned]] typedef int I1;
[[gnu::aligned]] typedef int const I2;

inline I1 rtn1(void) { return 3; };
inline I2 rtn2(void) { return 3; };

typeof(rtn1()) rtn_i1; // clang: 16, gcc: 16
typeof(rtn2()) rtn_i2; // clang:  4, gcc: 16

typeof((I1)3) cast_i1; // clang: 16, gcc: 4
typeof((I2)3) cast_i2; // clang:  4, gcc: 4