[PATCH] D29492: [SelectionDAG/ARM] Check LiveRegGens instead of LiveRegDefs in DelayForLiveRegsBottomUp

[Michael Kruse via Phabricator via llvm-commits]

Meinersbur created this revision.
Herald added subscribers: MatzeB, rengolin, aemerson.

This tries to fix PR30911 <http://llvm.org/PR30911>

This is an ad-hoc fix suggested by Eli Friedman. The problem might deeper in that the `CallResource` dependency is not correctly unscheduled. More details in that bug report. It would be nice if someone with more expertise with the SelectionDAG could have a look.


https://reviews.llvm.org/D29492

Files:
  lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
  test/CodeGen/ARM/unschedule-first-call.ll

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