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diff --git a/graph/README.md b/graph/README.md index f7037548..8d3850e7 100644 --- a/graph/README.md +++ b/graph/README.md @@ -156,6 +156,18 @@ This keeps both graphs side by side in the chapter README. Chapter 10a's [load-after-store example](../chapter10a/README.md#local-memory-optimizations) uses this format to isolate a single rewrite. +Choose how much control to show according to the lesson. Keep it when teaching +control construction, branch elimination, loop nesting, or `break`/`continue`. +For a value rewrite inside an otherwise obvious branch or loop, omit the +routine CFG and its predicate-only computations, while preserving Phi data +inputs and their order. Chapter 5's arithmetic/Phi examples and Chapter 9's +optimization examples use this convention. Detached True/False projections +can identify important gates, including the two Returns in Chapter 9's first +GVN example. Describe omitted context in the caption or surrounding text. +If a snapshot omits a Loop, retain `"backedge": true` on its Phis' backedge +inputs so layout still puts the loop header values above their updates. This +is a documentation layout hint; live snapshots derive it from the Loop node. + The memory diagrams in 10a, 10b, and 11 also use viewer snapshots, with definitions above uses (apart from loop backedges) and arrows from use to definition. They omit control-flow context, including Regions and their Phi bindings, |