[PATCH] D139780: [AMDGPU] Unify divergent nodes if the PostDom tree has one root

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added a comment.

I haven't looked closely but some of these test changes look worse



================
Comment at: llvm/lib/Target/AMDGPU/AMDGPUUnifyDivergentExitNodes.cpp:192
+      (PDT.root_size() == 1 &&
+       !isa<BranchInst>(PDT.getRoot()->getTerminator())))
     return false;
----------------
What about switches? 


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D139780/new/

https://reviews.llvm.org/D139780