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...some tweaks, will be able to catch it. > I've tried manually scalarizing the arguments so the other select arguments are scalars, but the vectorizer still doesn't change it. Here is the scalarized IR. -------------- next part -------------- A non-text attachment was scrubbed... Name: manual_scalarize.ll Type: application/octet-stream Size: 1739 bytes Desc: not available URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20130820/1b1f33b4/attachment.obj> -------------- next part --------------

Hi Matt, This code maintains a vector of float4 and it inserts and extracts values from this vector. The ’select’ operations are already vectorized. Maybe a sequence of inst-combines (or DAG-combines) can help. If you re-write this code using scalars then the slp-vectorizer, with some tweaks, will be able to catch it. Thanks, Nadav On Aug 20, 2013, at 1:14 PM, Matt Arsenault <arsenm2 at

On Aug 20, 2013, at 10:22 , Nadav Rotem <nrotem at apple.com> wrote: > Can you send the IR of the function ? Attached is the -O0 and -O3 IR -------------- next part -------------- A non-text attachment was scrubbed... Name: vselect_optimized.ll Type: application/octet-stream Size: 1545 bytes Desc: not available URL: