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(*
* MLRISC IR
*
* This is for performing whole program analysis.
* All optimizations are based on this representation.
* It provides a few useful views: dominator tree, control dependence graph,
* loop nesting (interval) structure etc. Also there is a mechanism to
* incrementally attach additional views to the IR. The SSA infrastructure
* is implemented in such a manner.
*
* -- Allen
*)
signature MLRISC_IR =
sig
structure I : INSTRUCTIONS
structure CFG : CONTROL_FLOW_GRAPH
structure Dom : DOMINATOR_TREE
structure CDG : CONTROL_DEPENDENCE_GRAPH
structure Loop : LOOP_STRUCTURE
structure Util : CFG_UTIL
sharing Util.CFG = CFG
sharing CFG.I = I
sharing Loop.Dom = CDG.Dom = Dom
type cfg = CFG.cfg
type IR = CFG.cfg (* The IR looks just like a CFG! *)
type dom = (CFG.block,CFG.edge_info,CFG.info) Dom.dominator_tree
type pdom = (CFG.block,CFG.edge_info,CFG.info) Dom.postdominator_tree
type cdg = (CFG.block,CFG.edge_info,CFG.info) CDG.cdg
type loop = (CFG.block,CFG.edge_info,CFG.info) Loop.loop_structure
(*
* Extract various views from an IR.
* These are computed by need.
*)
val dom : IR -> dom
val pdom : IR -> pdom
val doms : IR -> dom * pdom
val cdg : IR -> cdg
val loop : IR -> loop
(*
* Signal that the IR has been changed
*)
val changed : IR -> unit
(*
* View as a picture
*)
val view : string -> IR -> unit (* view some facet of the IR *)
val views : string list -> IR -> unit (* view a set of facets *)
val viewSubgraph : IR -> cfg -> unit (* view a subgraph of the IR *)
(*
* This function allows the client to design a new view and extend
* the functionality of the IR
*)
val memo : string -> (IR -> 'facet) -> IR -> 'facet
val addLayout : string -> (IR -> GraphLayout.layout) -> unit
end
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