[PATCH] D20789: Consecutive memory access in Loop Vectorizer - fixed and simplified

[Elena Demikhovsky via llvm-commits]

delena created this revision.
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I fixed consecutive memory access detection in Loop Vectorizer.
It did not handle correctly cases without GEP. 

I started from this loop that wasn't vectorized.

for (int i=0; i<len; i++)
    *to++ = *from++;

Probably this loop should be resolved with memcpy, but it is another pass. Current loop vectorizer does not recognize consecutive memory access, because the generated code performs load/store without GEP. I use SCEV to detect consecutive access.


Repository:
  rL LLVM

http://reviews.llvm.org/D20789

Files:
  ../lib/Transforms/Vectorize/LoopVectorize.cpp
  ../test/Transforms/LoopVectorize/consec_no_gep.ll

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