[PATCH] D127609: [AtomicExpand] Make floating point conversion happens before fence insertion

[Kai Luo via Phabricator via llvm-commits]

lkail created this revision.
lkail added reviewers: efriedma, jyknight, nemanjai, reames, PowerPC, arsenm.
Herald added subscribers: steven.zhang, hiraditya.
Herald added a project: All.
lkail requested review of this revision.
Herald added subscribers: llvm-commits, wdng.
Herald added a project: LLVM.

IIUC, the conversion part is not part of atomic operations. Fences should be put around converted atomic operations.
This also fixes atomic load of floating point values which requires fence on PowerPC.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D127609

Files:
  llvm/lib/CodeGen/AtomicExpandPass.cpp
  llvm/test/CodeGen/PowerPC/cfence-double.ll
  llvm/test/CodeGen/PowerPC/cfence-float.ll

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