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Mention -Z unpretty=mir-cfg for debugging MIR #1112

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Merged
merged 1 commit into from
Apr 23, 2021
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Mention -Z unpretty=mir-cfg for debugging MIR #1112

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5 changes: 5 additions & 0 deletions src/mir/debugging.md
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Original file line number Diff line number Diff line change
Expand Up @@ -88,6 +88,11 @@ rustc.main.002-006.NoLandingPads.before.mir
(Here, the `main-promoted[0]` files refer to the MIR for "promoted constants"
that appeared within the `main` function.)

The `-Z unpretty=mir-cfg` flag can be used to create a graphviz MIR
control-flow diagram for the whole crate:

![A control-flow diagram](mir_cfg.svg)

TODO: anything else?

[dataflow state]: ./dataflow.html#graphviz-diagrams
270 changes: 270 additions & 0 deletions src/mir/mir_cfg.svg
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