s390x looks through pointers when determining the "externally
visible vector ABI". For that reason, the test shows different
behavior just on that platform.
Adjust the test in the reverse direction of what I originall did:
Make sure that the type behind the pointer is always queried, by
dereferencing the pointer.
In CGTypes, directly create opaque pointers, without computing the
LLVM element type. This is not as straightforward as I though it
would be, because apparently computing the LLVM type also causes a
number of side effects.
In particular, we no longer produce diagnostics like -Wpacked for
typed (only) behind pointers, because we no longer depend on their
layout.
Differential Revision: https://reviews.llvm.org/D152505
Allow completing a redeclaration check for anonymous structs/unions
inside `RecordDecl`, so we deserialize and compare anonymous entities
from different modules.
Completing the redeclaration chain for `RecordDecl` in
`ASTContext::getASTRecordLayout` mimics the behavior in
`CXXRecordDecl::dataPtr`. Instead of completing the redeclaration chain
every time we request a definition, do that right before we need a
complete definition in `ASTContext::getASTRecordLayout`.
Such code is required only for anonymous `RecordDecl` because we
deserialize named decls when we look them up by name. But it doesn't
work for anonymous decls as they don't have a name. That's why need to
force deserialization of anonymous decls in a different way.
rdar://81864186
Differential Revision: https://reviews.llvm.org/D140055
When two modules contain struct/union with the same name, check the
definitions are equivalent and diagnose if they are not. This is similar
to `CXXRecordDecl` where we already discover and diagnose mismatches.
rdar://problem/56764293
Differential Revision: https://reviews.llvm.org/D71734
