[PATCH] D22918: [Loop Vectorizer] Support predication of div/rem

[Gil Rapaport via llvm-commits]

gilr created this revision.
gilr added reviewers: mkuper, jmolloy.
gilr added subscribers: llvm-commits, Ayal, delena.
Herald added a subscriber: mzolotukhin.

div/rem instructions in basic blocks that require predication currently prevent vectorization. This patch extends the existing mechanism for predicating stores to handle other instructions and leverages it to predicate divs and rems.

The generated vector extracts and inserts are now moved into the predicated block (reflected in the cost model for scalarization).

https://reviews.llvm.org/D22918

Files:
  lib/Transforms/Vectorize/LoopVectorize.cpp
  test/Transforms/LoopVectorize/if-pred-non-void.ll
  test/Transforms/LoopVectorize/if-pred-stores.ll

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