[PATCH] D47463: [TableGen] Avoid leaking TreePatternNodes by using shared_ptr.

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: craig.topper, dsanders, stoklund, tstellar, zturner.

By using std::shared_ptr for TreePatternNode, we can avoid leaking them.
Together with the other patches in linked to this one, ASAN shipped with
GCC8 is happy for TableGen.

I tried to keep the number of times we copy shared_ptrs around small,
but I probably missed a few places where there is no need to copy them.


https://reviews.llvm.org/D47463

Files:
  utils/TableGen/CodeGenDAGPatterns.cpp
  utils/TableGen/CodeGenDAGPatterns.h
  utils/TableGen/DAGISelMatcherGen.cpp

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