[PATCH] D92393: [PowerPC] prepare more dq form for P10 pair load/store

[ChenZheng via Phabricator via llvm-commits]

shchenz created this revision.
shchenz added reviewers: jsji, steven.zhang, nemanjai, PowerPC.
Herald added subscribers: llvm-commits, kbarton, hiraditya.
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shchenz requested review of this revision.

For P10 <https://reviews.llvm.org/P10>, we have dq form pair load/store.Making `PPCLoopInstrFormPrep` pass can prepare more dq form chains. 
This is important if there are many IV Users in a loop. Because currently many search space narrow heuristics functions are targeted for register number, but on powerpc we should narrow search space targeted for instruction number.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D92393

Files:
  llvm/lib/Target/PowerPC/PPCLoopInstrFormPrep.cpp
  llvm/test/CodeGen/PowerPC/more-dq-form-prepare.ll

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