How to run hlo-opt?

[AlexRibard]

I've followed the instruction to build from source with docker.
And I am trying to run hlo-opt on some HLO file.
https://openxla.org/xla/tools
This tells me to run hlo-opt --platform=CPU --list-stages
But I just get exec: "hlo-opt": executable file not found in $PATH: unknown

[mooskagh]

You need to compile (or directly run) it using bazel, something like:

To run directly through bazel:

$ bazel run -c opt //xla/tools:hlo-opt -- --platform=CPU --list-stages

If you already compiled it, hlo-opt will be in the ./bazel-bin/xla/tools/ subdirectory of your xla repository.

[AlexRibard]

Nice! thank you it works :)
I am now trying to run hlo on a file and see the resulting optimization. For example:
bazel run -c opt //xla/tools:hlo-opt <paht>xla/xla/service/gpu/fusions/tests/input_slices/simple.hlo -- --platform=CPU --stage=hlo
How do I dump out the resulted optimized hlo file?

[AlexRibard]

Erratum, it worked! amazing