[all-commits] [llvm/llvm-project] 2e83cc: ADT: Support copying of IntrusiveRefCntPtr objects

[David Blaikie via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2e83ccc2ee333389110659f3cb313968a0c970d4
      https://github.com/llvm/llvm-project/commit/2e83ccc2ee333389110659f3cb313968a0c970d4
  Author: David Blaikie <dblaikie at gmail.com>
  Date:   2020-12-03 (Thu, 03 Dec 2020)

  Changed paths:
    M llvm/include/llvm/ADT/IntrusiveRefCntPtr.h
    M llvm/unittests/ADT/IntrusiveRefCntPtrTest.cpp

  Log Message:
  -----------
  ADT: Support copying of IntrusiveRefCntPtr objects

This was partially supported but untested for RefCountedBase (the
implicit copy assignment would've been problematic - so delete that) and
unsupported (would not have compiled, because std::atomic is
non-copyable) for ThreadSafeRefCountedBase (implement similar support
to RefCountedBase)

Fix the test that had a copy ctor for the derived object but called
RefCountBase's default ctor from that copy ctor - which meant it wasn't
actually testing RefCountBase's copy semantics.