[PATCH] D30966: AMDGPU: Fix annotating loops with nested loop conditions

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
Herald added subscribers: tpr, dstuttard, tony-tye, yaxunl, nhaehnle, wdng, kzhuravl.

If the branch condition for a loop was a phi which itself
was fed from a phi from a loop, it isn't safe to try
to delete the phi until after the loop is handled.


https://reviews.llvm.org/D30966

Files:
  lib/Target/AMDGPU/SIAnnotateControlFlow.cpp
  test/CodeGen/AMDGPU/nested-loop-conditions.ll

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