[cfe-dev] Performance problem with SIMD support

Eric Christopher echristo at gmail.com
Wed Sep 11 11:06:34 PDT 2013


On Wed, Sep 11, 2013 at 9:00 AM, Richard Hadsell
<hadsell at blueskystudios.com> wrote:
> On 09/10/2013 03:04 PM, Richard Hadsell wrote:
>>
>> I am ready to send you a test case.  The asm SIMD code runs slower than
>> the equivalent C++ non-SIMD code.  How do I send it to you?
>>
> I submitted a bug report: http://llvm.org/bugs/show_bug.cgi?id=17195
>

I've responded to one part of it (the -O0 part), but the performance
problem can be looked at separately. You might want to look at the
generated code for each function as well.

-eric



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