[PATCH] D17061: [MS ABI] Never reference dllimport'd vtables

[David Majnemer via cfe-commits]

majnemer created this revision.
majnemer added reviewers: rnk, hans, thakis, rsmith.
majnemer added a subscriber: cfe-commits.

Referencing a dllimported vtable is impossible in a constexpr
constructor.  It would be friendlier to C++ programmers if we
synthesized a copy of the vftable which referenced imported virtual
functions.  This would let us initialize the object in a way which
preserves both the intent to import functionality from another DLL while
also making constexpr work.

http://reviews.llvm.org/D17061

Files:
  lib/AST/MicrosoftMangle.cpp
  lib/AST/VTableBuilder.cpp
  lib/CodeGen/MicrosoftCXXABI.cpp
  test/CodeGenCXX/dllimport-rtti.cpp
  test/CodeGenCXX/dllimport.cpp
  test/CodeGenCXX/microsoft-abi-vftables.cpp

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