compiler.cfg.dependence: more docs for the vocab

basis/compiler/cfg/dependence/dependence-docs.factor

@@ -1,6 +1,33 @@
 USING: compiler.cfg.instructions help.markup help.syntax sequences ;
 IN: compiler.cfg.dependence
 
+HELP: node
+{ $class-description "Nodes in the dependency graph. These need to be numbered so that the same instruction will get distinct nodes if it occurs multiple times. It has the following slots:"
+  { $table
+    { { $slot "number" } { "Sequence number to differentiate two otherwise equal nodes from each other. " } }
+    { { $slot "insn" } { { $link insn } } }
+    { { $slot "parent" } { "Node which must precede this node in the instruction flow." } }
+  }
+} ;
+
 HELP: <node>
 { $values { "insn" insn } { "node" node } }
 { $description "Creates a new dependency graph node from an CFG instruction." } ;
+
+{ node <node> } related-words
+
+HELP: attach-parent
+{ $values { "node" node } { "parent" node } }
+{ $description "Inserts 'node' as a children of 'parent' and sets the parent of 'node' to 'parent'." }
+{ $examples
+  { $unchecked-example
+    "USING: compiler.cfg.dependence ;"
+    "T{ ##replace } T{ ##set-slot-imm } [ <node> ] bi@ attach-parent"
+  }
+} ;
+
+
+ARTICLE: "compiler.cfg.dependence" "Dependence graph construction"
+"This vocab is used by " { $vocab-link "compiler.cfg.scheduling" } "." ;
+
+ABOUT: "compiler.cfg.dependence"

basis/compiler/cfg/dependence/dependence.factor

@@ -7,8 +7,6 @@ make math combinators.short-circuit vectors ;
 FROM: namespaces => set ;
 IN: compiler.cfg.dependence
 
-! Dependence graph construction
-
 SYMBOL: roots
 SYMBOL: node-number
 SYMBOL: nodes
@@ -16,9 +14,6 @@ SYMBOL: nodes
 SYMBOL: +data+
 SYMBOL: +control+
 
-! Nodes in the dependency graph
-! These need to be numbered so that the same instruction
-! will get distinct nodes if it occurs multiple times
 TUPLE: node
     number insn precedes follows
     children parent
@@ -153,6 +148,6 @@ ERROR: node-missing-children trees nodes ;
 
 : build-fan-in-trees ( -- )
     make-trees verify-trees [
-        -1/0. >>parent-index 
+        -1/0. >>parent-index
         calculate-registers drop
     ] each ;