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(*
* Instruction properties for utilizing the SSA form
*
* -- Allen (leunga@cs.nyu.edu)
*)
signature SSA_PROPERTIES =
sig
structure I : INSTRUCTIONS
structure C : CELLS
structure RTL : MLTREE_RTL
structure RTLProps : RTL_PROPERTIES
structure OT : OPERAND_TABLE
sharing RTLProps.I = OT.I = I
sharing I.C = C
sharing RTLProps.RTL = RTL
(* Create special nodes *)
val source : I.instruction
val sink : I.instruction
val phi : I.instruction
(* Physical registers whose value are volatile *)
val volatile : C.cell list
(* Instructions with definitions (or use) of these registers will not
* be moved
*)
val pinnedDef : C.cell list
val pinnedUse : C.cell list
(* Definitions (or use) of these registers will not be renamed *)
val fixedDef : C.cell list
val fixedUse : C.cell list
(* Extract the naming constraints on the operands *)
val namingConstraints :
{ instr : I.instruction, dst : C.cell list, src : C.cell list } ->
{ dst : (RTL.T.var * C.cell) list, (* destination is fixed *)
src : (RTL.T.var * C.cell) list, (* source is fixed *)
dstsrc : (RTL.T.var * RTL.T.var) list (* dst = src *)
}
(* Rewrite the operands of an instruction *)
val rewriteOperands :
{ const : int -> OT.const } ->
{ instr : I.instruction, dst : C.cell list, src : C.cell list } ->
I.instruction
(* Make copies *)
val copies : {kind: C.cellkind, dst:C.cell, src:C.cell} list ->
I.instruction list
end
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