[PATCH] D22696: [CodeGenPrep] Skip merging empty case blocks

[Jun Bum Lim via llvm-commits]

junbuml updated this revision to Diff 78630.
junbuml added a comment.

Address David's comment. Now we compute BFI/BPI only when it need to be.


https://reviews.llvm.org/D22696

Files:
  lib/CodeGen/CodeGenPrepare.cpp
  test/CodeGen/X86/phi-immediate-factoring.ll
  test/CodeGen/X86/ragreedy-hoist-spill.ll
  test/Transforms/CodeGenPrepare/AArch64/widen_switch.ll
  test/Transforms/CodeGenPrepare/X86/widen_switch.ll
  test/Transforms/CodeGenPrepare/skip-merging-case-block.ll

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