[PATCH] D43270: [GISel][Tablegen]: Make GlobalISelEmitter rule prioritization similar to that of selectionDAG

[Aditya Nandakumar via Phabricator via llvm-commits]

aditya_nandakumar created this revision.
aditya_nandakumar added reviewers: dsanders, qcolombet, rovka, ab.
Herald added a subscriber: kristof.beyls.

This patch changes GlobalISelEmitter to rank patterns similar to how the DAG does it (ie it computes a score for a pattern and adds the added complexity to it).
This is so that the decision tree for GISelSelector remains compatible with that of SelectionDAG.


Repository:
  rL LLVM

https://reviews.llvm.org/D43270

Files:
  test/CodeGen/X86/GlobalISel/select-blsi.mir
  test/TableGen/GlobalISelEmitter.td
  utils/TableGen/GlobalISelEmitter.cpp

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