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"https://github.com/oflatt/egg-smol", rev = "057725d9353727d831c90c7f8fdd76954d06b351" } +strum = "0.25" +strum_macros = "0.25" +main_error = "0.1.2" +thiserror = "1.0" +bril-rs = { git = "https://github.com/sampsyo/bril", rev = "daaff28" } diff --git a/tree_inputs/semantics.md b/tree_inputs/semantics.md new file mode 100644 index 000000000..44b6be0a7 --- /dev/null +++ b/tree_inputs/semantics.md @@ -0,0 +1,21 @@ +;; Input schema idea + +;; current schema: +(Let id1 some_input + (Add (Get (Arg id1) 0) (Get (Arg id1) 1))) + +=> + +;; input appears twice but evaluated only once +;; "dag semantics for inputs" +(Let + (Add (Get (Input some_input) 0) (Get (Input some_input) 1))) + + +(Let + (Add (Get (Input inner) 0) (Get (Input inner) 1))) + + +(Loop + (Add (Input some_loop_inputs) (Input some_loop_inputs))) + diff --git a/tree_inputs/src/schema.egg b/tree_inputs/src/schema.egg new file mode 100644 index 000000000..bd5ea0632 --- /dev/null +++ b/tree_inputs/src/schema.egg @@ -0,0 +1,128 @@ +(datatype Expr) +(datatype ListExpr (Cons Expr ListExpr) (Nil)) + +(sort TypeList) + +(datatype Type + (IntT) + (BoolT) + (FuncT Type Type) + (TupleT TypeList) ; Use a tuple of length 0 for a "unit" type +) + +(function TNil () TypeList) +(function TCons (Type TypeList) TypeList) + +; ========================== +; Operators that do not create regions +; ========================== +(datatype BinaryOp + (Add) + (Sub) + (Mul) + (LessThan) + (And) + (Or) + (Write)) +(datatype UnaryOp + (Not) + (Print)) + +; A Ctx defines an equality relation. +; All program leaves need to refer to a context to distinguish the equality relations. +; No term should mix two contexts that are not equal. +(datatype Ctx + (Global) ; set of equalities between programs, assuming nothing + ; Ctx is hard to add but easy to remove. + ; We haven't decided what other Ctxs we may want to support. Here are two + ; potential use cases: + ; (Term) ; set of only reflexive equalities between programs (e.g. a = a) + ; (PathCondition Expr) ; set of equalities between programs, assuming the path condition on the argument +) + +; Constants +(datatype Constant + (Int i64) + (Bool bool)) +(function Const (Ctx Constant) Expr) + +; Operators +(function Bop (BinaryOp Expr Expr) Expr) +(function Uop (UnaryOp Expr) Expr) +; gets from a tuple. static index +(function Get (Expr i64) Expr) +; read has a type, so it can't be a bop +(function Read (Expr Type) Expr) + +; ========================== +; Tuple operations +; ========================== +(datatype Order (Parallel) (Sequential)) + +; Perform a list of operations. Only way to create a tuple! +; Needs a Ctx because the list may be empty. +; E.g. (All (Parallel) (Nil)) is a leaf, so it needs a Ctx. +(function All (Ctx Order ListExpr) Expr) + +; Switch on a list of lazily-evaluated branches. Does not create a region. +; pred must be an integer +; pred branches chosen +(function Switch (Expr ListExpr) Expr) +; If is like switch, but with a boolean predicate +; pred then else +(function If (Expr Expr Expr) Expr) + + +; ========================== +; Regions +; ========================== + +; An `Input` marks a shared computation inside of a region (Loop or Let). +; Invariant: All inputs that are children of a region are equal. +; Invariant: (Input a) = (Input b) iff a = b. +; Invariant: An Input must have an enclosing region. An input cannot be +; a child of an input without a region constructor (Loop or Let) in-between. +; e.g. (Input (Add (Input 1) 2)) is invalid, since a new region was not created for the inner input. +; e.g. (Let (Input (Let (Input (Farg (IntT)))))) is valid. +; Don't union Inputs directly- they will be unioned via congruence. +(function Input (Expr) Expr) +; A function argument. +; In leaf regions, use `(Input (Farg some_type))` to refer to +; the function's inputs. +(function Farg (Type) Expr) + + + +; Creates a region, allowing for a shared computation +; using `Input`. Evaluates the `input` first, then +; evaluates `output` on the result. +; +; output +(function Let (Expr) Expr) + + +; A do-while loop. +; `output` and `pred` are evaluated inside the loop, +; with the `output` evaluated first. +; `pred` must be a boolean, while `output` can have any type. +; +; output pred +(function Loop (Expr Expr) Expr) + +; ========================== +; Functions +; ========================== + +; An entry function and a list of additional functions. +; entry function other functions +(relation Program (Expr ListExpr)) +; name input ty output ty output +(function Function (String Type Type Expr) Expr) + +; name of func arg +(function Call (String Expr) Expr) + + +; Rulesets +(ruleset always-run) +(ruleset error-checking) diff --git a/tree_optimizer/src/schema.egg b/tree_optimizer/src/schema.egg index bd5ea0632..dea2dbd25 100644 --- a/tree_optimizer/src/schema.egg +++ b/tree_optimizer/src/schema.egg @@ -1,3 +1,9 @@ +; We could generate this from ir.rs, this manual version is just easier reference. + +(sort IdSort) +(function Id (i64) IdSort) +(function Shared () IdSort) +(let shared (Shared)) (datatype Expr) (datatype ListExpr (Cons Expr ListExpr) (Nil)) @@ -7,122 +13,97 @@ (IntT) (BoolT) (FuncT Type Type) - (TupleT TypeList) ; Use a tuple of length 0 for a "unit" type + (TupleT TypeList) + (UnitT) ) (function TNil () TypeList) (function TCons (Type TypeList) TypeList) ; ========================== -; Operators that do not create regions +; Pure operators ; ========================== -(datatype BinaryOp +; id val +(datatype BinPureOp (Add) (Sub) (Mul) (LessThan) (And) - (Or) - (Write)) -(datatype UnaryOp - (Not) - (Print)) - -; A Ctx defines an equality relation. -; All program leaves need to refer to a context to distinguish the equality relations. -; No term should mix two contexts that are not equal. -(datatype Ctx - (Global) ; set of equalities between programs, assuming nothing - ; Ctx is hard to add but easy to remove. - ; We haven't decided what other Ctxs we may want to support. Here are two - ; potential use cases: - ; (Term) ; set of only reflexive equalities between programs (e.g. a = a) - ; (PathCondition Expr) ; set of equalities between programs, assuming the path condition on the argument -) + (Or)) +(datatype UnaryPureOp + (Not)) -; Constants -(datatype Constant - (Int i64) - (Bool bool)) -(function Const (Ctx Constant) Expr) +;; Constants +(function UnitExpr (IdSort) Expr) +(function Num (IdSort i64) Expr) +; id val +(function Boolean (IdSort bool) Expr) -; Operators -(function Bop (BinaryOp Expr Expr) Expr) -(function Uop (UnaryOp Expr) Expr) -; gets from a tuple. static index -(function Get (Expr i64) Expr) -; read has a type, so it can't be a bop -(function Read (Expr Type) Expr) +;; Pure operators +(function BOp (BinPureOp Expr Expr) Expr) +(function UOp (UnaryPureOp Expr) Expr) +(function Get (Expr i64) Expr) ; gets from a tuple. static index ; ========================== -; Tuple operations +; Effectful operators +; ========================== + +; value unit +(function Print (Expr) Expr) +; addr type value +(function Read (Expr Type) Expr) +; addr value unit +(function Write (Expr Expr) Expr) + ; ========================== +; Control flow operators +; ========================== + (datatype Order (Parallel) (Sequential)) ; Perform a list of operations. Only way to create a tuple! -; Needs a Ctx because the list may be empty. -; E.g. (All (Parallel) (Nil)) is a leaf, so it needs a Ctx. -(function All (Ctx Order ListExpr) Expr) +(function All (IdSort Order ListExpr) Expr) -; Switch on a list of lazily-evaluated branches. Does not create a region. +; Switch on a list of lazily-evaluated branches. +; branches must be constructed with `(Branch id expr)`. ; pred must be an integer -; pred branches chosen -(function Switch (Expr ListExpr) Expr) +; pred branches chosen +(function Switch (Expr ListExpr) Expr) ; If is like switch, but with a boolean predicate -; pred then else +; pred then else (function If (Expr Expr Expr) Expr) - +(function Branch (IdSort Expr) Expr) ; ========================== ; Regions ; ========================== -; An `Input` marks a shared computation inside of a region (Loop or Let). -; Invariant: All inputs that are children of a region are equal. -; Invariant: (Input a) = (Input b) iff a = b. -; Invariant: An Input must have an enclosing region. An input cannot be -; a child of an input without a region constructor (Loop or Let) in-between. -; e.g. (Input (Add (Input 1) 2)) is invalid, since a new region was not created for the inner input. -; e.g. (Let (Input (Let (Input (Farg (IntT)))))) is valid. -; Don't union Inputs directly- they will be unioned via congruence. -(function Input (Expr) Expr) -; A function argument. -; In leaf regions, use `(Input (Farg some_type))` to refer to -; the function's inputs. -(function Farg (Type) Expr) - - - -; Creates a region, allowing for a shared computation -; using `Input`. Evaluates the `input` first, then -; evaluates `output` on the result. +; pred and output are evaluated inside the loop's context +; input and output may or may not be a tuples. pred must be boolean. ; -; output -(function Let (Expr) Expr) +; id input (pred, output) tuple +(function Loop (IdSort Expr Expr) Expr) +; id input output +(function Let (IdSort Expr Expr) Expr) -; A do-while loop. -; `output` and `pred` are evaluated inside the loop, -; with the `output` evaluated first. -; `pred` must be a boolean, while `output` can have any type. -; -; output pred -(function Loop (Expr Expr) Expr) +; Arg gets the input of a region or the parameter of a function +(function Arg (IdSort) Expr) ; ========================== ; Functions ; ========================== -; An entry function and a list of additional functions. -; entry function other functions -(relation Program (Expr ListExpr)) -; name input ty output ty output -(function Function (String Type Type Expr) Expr) +; A list of functions, with the first one being the entry point +(function Program (ListExpr) Expr) +; id name input ty output ty output +(function Function (IdSort String Type Type Expr) Expr) -; name of func arg -(function Call (String Expr) Expr) +; referencing id name of func arg +(function Call (IdSort String Expr) Expr) -; Rulesets +;; Rulesets (ruleset always-run) -(ruleset error-checking) +(ruleset error-checking) \ No newline at end of file