[PATCH] D82730: [SimplifyCFG] Merge identical basic blocks (WIP)

[Nikita Popov via Phabricator via llvm-commits]

nikic updated this revision to Diff 275554.
nikic added a comment.

Improve phi handling. Blocks with phi nodes can be merged, but it requires some care when backedges are involved.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D82730/new/

https://reviews.llvm.org/D82730

Files:
  llvm/lib/Transforms/Scalar/SimplifyCFGPass.cpp
  llvm/lib/Transforms/Utils/SimplifyCFG.cpp
  llvm/test/Transforms/LoopDeletion/simplify-then-delete.ll
  llvm/test/Transforms/LoopUnswitch/infinite-loop.ll
  llvm/test/Transforms/PGOProfile/chr.ll
  llvm/test/Transforms/SimplifyCFG/ForwardSwitchConditionToPHI.ll
  llvm/test/Transforms/SimplifyCFG/HoistCode.ll
  llvm/test/Transforms/SimplifyCFG/X86/switch_to_lookup_table.ll
  llvm/test/Transforms/SimplifyCFG/duplicate-landingpad.ll
  llvm/test/Transforms/SimplifyCFG/merge-blocks.ll
  llvm/test/Transforms/SimplifyCFG/wc-widen-block.ll

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