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diff --git a/chapter05/README.md b/chapter05/README.md index 88bacbfc..7337da33 100644 --- a/chapter05/README.md +++ b/chapter05/README.md @@ -41,7 +41,7 @@ Here is a recap of the nodes introduced in previous chapters: |-----------|----------------|---------|------------------------------------------------|-------------------------------------------------------------------------------|----------------------------------------------------------------------------| | Multi | Abstract class | 4 | A node that has a tuple result | | A tuple | | Start | Control | 1 | Start of function, now a MultiNode | | A tuple with a ctrl token and an `arg` data node | -| Proj | Data | 4 | Projection nodes extract values from MultiNode | A MultiNode and index | Result is the extracted value from the input MultiNode at offset index | +| Proj | Data / Control | 4 | Projection nodes extract values from MultiNode | A MultiNode and index | Result is the extracted value from the input MultiNode at offset index | | Bool | Data | 4 | Represents results of a comparison operator | Two data nodes | Result is a comparison, represented as integer value where 1=true, 0=false | | Not | Data | 4 | Logical not | One data node | Result converts 0 to 1 and vice versa | | Return | Control | 1 | End of function | Predecessor control node and a data node for the return value of the function | Return value of the function | @@ -53,6 +53,10 @@ Here is a recap of the nodes introduced in previous chapters: | Minus | Data | 2 | Negate a value | One data node which value is negated | Result of the negation | | Scope | Symbol Table | 3 | Represents scopes in the graph | Nodes that represent the current value of variables | None | +> A `Proj` is a control node when it projects a control slot: `Proj#0` off `Start`, +> and both projections off an `If`. Every other projection is a data node. +> See `ProjNode.isCFG()`. + ## New Nodes The following new nodes are introduced in this chapter: |