[PATCH] D12385: Generating Assumption loads fix

[Piotr Padlewski via cfe-commits]

Prazek created this revision.
Prazek added reviewers: rsmith, majnemer, rjmccall.
Prazek added a subscriber: cfe-commits.

It wasn't always safe to generate assumption loads. Last time build failed on linking of classes like FenceInst because
it didn't introduce any new virtual function, and it had implicit virtual destructor.

http://reviews.llvm.org/D12385

Files:
  lib/CodeGen/CGCXXABI.h
  lib/CodeGen/CGClass.cpp
  lib/CodeGen/CGVTables.cpp
  lib/CodeGen/ItaniumCXXABI.cpp
  lib/CodeGen/MicrosoftCXXABI.cpp
  test/CodeGenCXX/template-instantiation.cpp
  test/CodeGenCXX/thunks.cpp
  test/CodeGenCXX/vtable-assume-load.cpp
  test/CodeGenCXX/vtable-available-externally.cpp

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