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2013 Jul 30
1
[LLVMdev] Enabling the SLP-vectorizer by default for -O3
Nadav, I ran some benchmarks and I'm seeing 3-6% performance loss on a few of them when we use SLP on both O2 and O3 (with O3 having the biggest differences). Unfortunately, my benchmarking is not scientific, so I can't vow for those numbers, nor I'll have time to investigate it closer in the short term, but I wouldn't be surprised if this is result of extra shuffles we were