[llvm-commits] [llvm] r166642 - in /llvm/trunk: include/llvm/Target/TargetLowering.h include/llvm/Target/TargetTransformImpl.h lib/Target/TargetTransformImpl.cpp lib/Transforms/IPO/PassManagerBuilder.cpp lib/Transforms/Vectorize/LoopVectorize.cpp test/Transforms/LoopVectorize/cost-model.ll

[Nadav Rotem]

On Oct 24, 2012, at 8:27 PM, Hal Finkel <hfinkel at anl.gov> wrote:

> This should correspond to an ADD + MUL? Given that we have a vectorized GEP, I'd think that we certainly don't want this to be zero.
> 

FWIW, I think that vector-geps are only a good idea for scatter/gather instructions (such as the one MIC has).   The reason is that scalar GEPs can be implemented as part of the addressing mode. 

So, I think that we should not emit vector-geps unless we have a really good reason. 

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