Enable `interleave` for Loop Optimization about llvmlite HOT 4 OPEN

hm... LLVM14 actual have it on by default: https://github.com/llvm/llvm-project/blob/f28c006a5895fc0e329fe15fead81e37457cb1d1/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp#L194-L223

from llvmlite.

found another llvm issue related to this: llvm/llvm-project#47011.

This makes me a bit confused. If we didn't specify disable interleave, why the debug msg tells me it's disabled by pass manager? need to figure out. Perhaps it's related to optimization level. However, I did rerun my test case with setting NUMBA_OPT to max, the log still shows disabled.

from llvmlite.

Looks like PassManagerBuilder has a lot of new options: https://github.com/llvm-mirror/llvm/blob/2c4ca6832fa6b306ee6a7010bfb80a3f2596f824/lib/Transforms/IPO/PassManagerBuilder.cpp#L150-L177
Update: This is LLVM10

from llvmlite.

Thanks for digging. After your digging, this is more interesting to me, since I did use LLVM 14.0.6 to locally build llvmlite, I strictly followed the llvm14 recipe provided by llvmlite. I suppose I have to provide a simple reproducer to prove myself.. Will try.

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