[PATCH] D27193: MachineLoopInfo: add function findInductionRegister.

[Sjoerd Meijer via Phabricator via llvm-commits]

SjoerdMeijer created this revision.
SjoerdMeijer added reviewers: jmolloy, bcahoon, kparzysz, qcolombet.
SjoerdMeijer added a subscriber: llvm-commits.

MachineLoopInfo: add function findInductionRegister. This is mainly refactored from the Hexagon backend and is intended to be NFC. This is more groundwork to recognise loop induction variables and trip counts for MachineLoops, and is related to https://reviews.llvm.org/D27191 and https://reviews.llvm.org/D27192.


https://reviews.llvm.org/D27193

Files:
  include/llvm/CodeGen/MachineLoopInfo.h
  lib/CodeGen/MachineLoopInfo.cpp
  lib/Target/Hexagon/HexagonHardwareLoops.cpp

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