[PATCH] D30536: [tablegen][globalisel] Convert the SelectionDAG importer to a tree walking approach. NFC

[Daniel Sanders via Phabricator via llvm-commits]

dsanders created this revision.
Herald added subscribers: kristof.beyls, dberris.

But don't actually inspect the tree any deeper than we already do. This
change is NFC but the next one will enable full traversal of the
source/destination patterns.

Depends on https://reviews.llvm.org/D30535


https://reviews.llvm.org/D30536

Files:
  utils/TableGen/GlobalISelEmitter.cpp

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