[PATCH] D48181: [JumpThreading] Ignore nil destionation when determining whether a block only goes to a single destination

[Xin Tong via Phabricator via llvm-commits]

trentxintong updated this revision to Diff 151414.
trentxintong added a comment.

Handle when all destinations are null (i.e. UNDEF value). There is a slight change in pr22086.ll this is due
to we do not run SimplifyInstructionsInBlock after folding (we run after threading).


Repository:
  rL LLVM

https://reviews.llvm.org/D48181

Files:
  lib/Transforms/Scalar/JumpThreading.cpp
  test/Transforms/JumpThreading/fold-not-thread.ll
  test/Transforms/JumpThreading/pr22086.ll

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