[LLVMdev] Probing the complexity of the LLVM's optimizations (original) (raw)

Junio Cezar juniocezar.dcc at gmail.com
Sun Oct 12 08:43:21 PDT 2014


Hello guys,

I am a student from UFMG, Brazil, and I am doing a research project in LLVM. I am running some experiments to estimate the complexity of the LLVM's optimizations. To do this, I run the optimizations over hundreds of different bytecode files, and collect the time spent by each optimization.

To get a large number of samples, I use CSmith, the random C program generator of Utah (from John Regehr's group). So, I can get hundreds of C files with different sizes. I also use the benchmarks available in the LLVM test suite.

The results of these experiments are available in my page: http://homepages.dcc.ufmg.br/~juniocezar/llvm/. You will find plots for all the optimizations there. They are mostly linear, but there are a few weird ones. You are all welcome to give me suggestions or point out mistakes in my report.

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