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

[Jun Bum Lim via llvm-commits]

junbuml updated this revision to Diff 67840.
junbuml marked 5 inline comments as done.
junbuml added a comment.

Sorry for the long trip time on this.  First, I make the test case very simple as Renato commented. I also make this applied conservatively because a branch instruction could be added in the empty case block. So, this will happen only when the frequency of empty case block is significantly lower than the frequency of header of switch. 
Please take a look and let me know any comment.
Thanks,
Jun


https://reviews.llvm.org/D22696

Files:
  lib/CodeGen/CodeGenPrepare.cpp
  test/Transforms/CodeGenPrepare/skip-merging-case-block.ll

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