Documentation

Lean.Compiler.LCNF.Simp.SimpM

  • declName : Lake.Name

    Name of the declaration being simplified. We currently use this information because we are generating phase1 declarations on demand, and it may trigger non-termination when trying to access the phase1 declaration.

  • inlineStack : List Lake.Name

    Stack of global declarations being recursively inlined.

  • inlineStackOccs : Lean.PHashMap Lake.Name Nat

    Mapping from declaration names to number of occurrences at inlineStack

Instances For
    • Free variable substitution. We use it to implement inlining and removing redundant variables let _x.i := _x.j

    • Track used local declarations to be able to eliminate dead variables.

    • Mapping containing free variables ids that need to be renamed (i.e., the binderName). We use this map to preserve user provide names.

    • Mapping used to decide whether a local function declaration must be inlined or not.

    • simplified : Bool

      true if some simplification was performed in the current simplification pass.

    • visited : Nat

      Number of visited let-declarations and terminal values. This is a performance counter, and currently has no impact on code generation.

    • inline : Nat

      Number of definitions inlined. This is a performance counter.

    • inlineLocal : Nat

      Number of local functions inlined. This is a performance counter.

    Instances For
      @[inline, reducible]
      Instances For

        Increment inline performance counter. It is the number of inlined global declarations.

        Instances For

          Increment inlineLocal performance counter. It is the number of inlined local function and join point declarations.

          Instances For

            Mark the local function declaration or join point with the given id as a "must inline".

            Instances For

              Add a new occurrence of local function fvarId.

              Instances For

                Add a new occurrence of local function fvarId in argument position .

                Instances For

                  Traverse code and update function occurrence map. This map is used to decide whether we inline local functions or not. If mustInline := true, then all local function declarations occurring in code are tagged as .mustInline. Recall that we use .mustInline for local function declarations occurring in type class instances.

                  Instances For
                    @[inline]

                    Execute x with an updated inlineStack. If value is of the form const ..., add const to the stack. Otherwise, do not change the inlineStack.

                    Instances For
                      @[inline]

                      Similar to the default Lean.withIncRecDepth, but include the inlineStack in the error messsage.

                      Instances For

                        Execute x with fvarId set as mustInline. After execution the original setting is restored.

                        Instances For

                          Return true if the given local function declaration or join point id is marked as once or mustInline. We use this information to decide whether to inline them.

                          Instances For

                            Return true if the given code is considered "small".

                            Instances For

                              Return true if the given local function declaration should be inlined.

                              Instances For

                                LCNF "Beta-reduce". The equivalent of (fun params => code) args. If mustInline is true, the local function declarations in the resulting code are marked as .mustInline. See comment at updateFunDeclInfo.

                                Instances For

                                  Erase the given let-declaration from the local context, and set the simplified flag to true.

                                  Instances For

                                    Erase the given local function declaration from the local context, and set the simplified flag to true.

                                    Instances For

                                      Similar to LCNF.addFVarSubst. That is, add the entry fvarId ↦ fvarId' to the free variable substitution. If fvarId has a non-internal binder name n, but fvarId' does not, this method also adds the entry fvarId' ↦ n to the binderRenaming map. The goal is to preserve user provided names.

                                      Instances For