[PATCH] D35584: [CGP] Folding into empty latch block is always profitable.

[Balaram Makam via Phabricator via llvm-commits]

bmakam created this revision.

If the destination block is an empty latch block then we can hoist
the jump through the backedge, so it is always profitable to merge.
During LSR, loopsimplify creates these empty blocks when it canonicalizes
the loop to have dedicated exit blocks.


https://reviews.llvm.org/D35584

Files:
  lib/CodeGen/CodeGenPrepare.cpp
  test/Transforms/CodeGenPrepare/merge-empty-latch-block.ll

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