[LLVMdev] Determine which loops are parallel in Loop pass

[Alexander Fougner]

Hello,

I have a couple of C/C++ programs I want to analyze/modify with a Loop
pass, and I want to find the loops free of loop-carried dependences.
The parallel loops are annotated with the OpenMP #pragma omp parallel for
directive, but OpenMP will not be used, just single-threaded execution. I
can also manually annotate/tag the source code if that would help, the
important part is that the pass automatically can determine whether the
loop is annotated parallel or not.

I've seen a few interesting options that might (or might not) solve my
problem.
- llvm.mem.parallel metadata ?
- annotate intrinsics/attributes ?

What would the simplest way to do this?

Thank you!

Alex
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