[PATCH] D137758: [HardwareLoops] remove loops which has undef count

[ChenZheng via Phabricator via llvm-commits]

shchenz created this revision.
shchenz added reviewers: samparker, dmgreen, nikic, PowerPC.
Herald added subscribers: steven.zhang, hiraditya, nemanjai.
Herald added a project: All.
shchenz requested review of this revision.
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.

Remove the loop which has the loop count `undef`. This aligns with `opt` behavior.

For the PowerPC code gen changes, to keep the original test point, I add a valid count for the loop in the input IR instead of changing the assembly based on the current IR.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D137758

Files:
  llvm/lib/CodeGen/HardwareLoops.cpp
  llvm/test/CodeGen/PowerPC/pr48519.ll
  llvm/test/CodeGen/PowerPC/sms-iterator.ll
  llvm/test/CodeGen/PowerPC/sms-phi-3.ll
  llvm/test/Transforms/HardwareLoops/remove-loop-count-undef-loop.ll

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