[PATCH] D88716: [TwoAddressInstruction][PowerPC] Call `regOverlapsSet` to find out real clobbers and uses

[Kai Luo via Phabricator via llvm-commits]

lkail created this revision.
lkail added reviewers: qcolombet, eli.friedman, Carrot, PowerPC.
Herald added subscribers: llvm-commits, shchenz, hiraditya, nemanjai.
Herald added a project: LLVM.
lkail requested review of this revision.

In `rescheduleKillAboveMI`, current implementation uses `SmallSet` to track reg's defs and uses. When comparing, use `SmallSet.count` to find if it's clobbered or used. It's not correctly if involving subregisters. This patch uses `regOverlapsSet` already used by `rescheduleMIBelowKill` to fix the issue.

Fixed https://bugs.llvm.org/show_bug.cgi?id=47707.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D88716

Files:
  llvm/lib/CodeGen/TwoAddressInstructionPass.cpp
  llvm/test/CodeGen/PowerPC/pr47707.ll

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