[LLVMdev] Enabling the vectorizer for -Os -- ping

[Xinliang David Li]

More data point for you: Intel's ICC turns on loop vectorizer at -O2
and -Os too.

Cheers,

David

On Thu, Jun 13, 2013 at 9:37 PM, Nadav Rotem <nrotem at apple.com> wrote:
> Hi,
>
> Last week I wrote llvm-dev and presented data that shows how enabling the vectorizer on -Os can improve the performance of many workloads and that it has negligible effects on code size.  I also added a command line switch to make it easier for people to benchmark the vectorizer using -Os directly from clang without changing LLVM.  Has anyone done any benchmarks on -Os + vectorization ?
>
> Thanks,
> Nadav
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