[LLVMdev] Generate scalar SSE instructions instead of packed instructions

[Nowicki, Tyler]

Hi,

I am interested in evaluating the performance of packed vs scalar double-precision floating point instructions on x86-atom and I was wondering if anyone knows more precisely where to modify llvm to use one or the other. I know I probably need to change something in the type legalizer. Could anyone provide more details than that?

Thanks,

Tyler
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