[PATCH] D19487: [LV] Reallow interleaved load groups with gaps

[Matthew Simpson via llvm-commits]

mssimpso updated this revision to Diff 55058.
mssimpso added a comment.

Addressed Silviu's comments.

Thanks for catching the negative stride. I now check that a group is not reversed (stride is negative) before allowing it. I also added a reversed test case and check that we do not generate vector loads. For negative strides, we will need a scalar prologue iteration rather than an epilogue, but I'd rather tackle that in a follow-on patch. In the meantime, I've refactored the current patch to distinguish the epilogue and prologue cases. Thanks!


http://reviews.llvm.org/D19487

Files:
  lib/Transforms/Vectorize/LoopVectorize.cpp
  test/Transforms/LoopVectorize/interleaved-accesses.ll

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