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Ask questions[PyCDE] Graphing API failing

The test that exercises this is failing for me: https://github.com/llvm/circt/blob/1ac87078f7ff95827af1ad3777e0bc3d4d7736e1/frontends/PyCDE/src/pycde/system.py#L46-L50

Specifically, I get this error:

MLIR Textual PassPipeline Parser:1:1: error: 'view-op-graph' does not refer to a registered pass or pass pipeline

I know that pass is part of mlir-opt, and I would have expected import mlir.all_passes_registration to make it available. Is there some other step I'm missing? Perhaps a CMake dependency that wasn't declared? I've built the following targets: MLIRBindingsPythonExtension, CIRCTBindingsPython, PyCDE, and check-pycde.

llvm/circt

Answer questions teqdruid

It may build against libgraphviz-dev.

On Thu, Jun 17, 2021 at 6:21 PM mikeurbach ***@***.***> wrote:

Hmm, well I do have the graphviz tools (like dot) available. I re-ran CMake just to confirm, and I still have this issue. I'll keep digging into it.

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useful!

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