------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- G E N _ I L . G E N -- -- -- -- B o d y -- -- -- -- Copyright (C) 2020-2022, Free Software Foundation, Inc. -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- -- ware Foundation; either version 3, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- -- for more details. You should have received a copy of the GNU General -- -- Public License distributed with GNAT; see file COPYING3. If not, go to -- -- http://www.gnu.org/licenses for a complete copy of the license. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ with Ada.Containers; use type Ada.Containers.Count_Type; with Ada.Text_IO; package body Gen_IL.Gen is Statistics_Enabled : constant Boolean := False; -- Change to True or False to enable/disable statistics printed by -- Atree. Should normally be False, for efficiency. Also compile with -- -gnatd.A to get the statistics printed. Enabling these statistics -- makes the compiler about 20% slower. Num_Header_Slots : constant := 3; -- Number of header slots; the first Num_Header_Slots slots are stored in -- the header; the rest are dynamically allocated in the Slots table. We -- need to subtract this off when accessing dynamic slots. The constant -- Seinfo.N_Head will contain this value. Fields that are allocated in the -- header slots are quicker to access. -- -- This number can be adjusted for efficiency. We choose 3 because the -- minimum node size is 3 slots, and because that causes the size of type -- Node_Header to be a power of 2. We can't make it zero, however, because -- C doesn't allow zero-length arrays. N_Head : constant String := Image (Field_Offset'(Num_Header_Slots)); -- String form of the above Enable_Assertions : constant Boolean := True; -- True to enable predicates on the _Id types, and preconditions on getters -- and setters. Overlay_Fields : constant Boolean := True; -- False to allocate every field so it doesn't overlay any other fields, -- which results in enormous nodes. For experimenting and debugging. -- Should be True in normal operation, for efficiency. SS : constant := 32; -- slot size in bits SSS : constant String := Image (Bit_Offset'(SS)); Inline : constant String := "Inline"; -- For experimenting with Inline_Always Syntactic : Fields_Per_Node_Type := (others => (others => False)); Nodes_And_Entities : constant Type_Vector := Node_Kind & Entity_Kind; All_Entities : constant Type_Vector := To_Vector (Entity_Kind, Length => 1); procedure Create_Type (T : Node_Or_Entity_Type; Parent : Opt_Abstract_Type; Fields : Field_Sequence; Nmake_Assert : String); -- Called by the Create_..._Type procedures exported by this package to -- create an entry in the Types_Table. procedure Create_Union_Type (Root : Root_Type; T : Abstract_Type; Children : Type_Array); -- Called by Create_Node_Union_Type and Create_Entity_Union_Type to create -- a union type. function Create_Field (Field : Field_Enum; Field_Type : Type_Enum; Default_Value : Field_Default_Value; Type_Only : Type_Only_Enum; Pre, Pre_Get, Pre_Set : String; Is_Syntactic : Boolean) return Field_Desc; -- Called by the Create_..._Field functions exported by this package to -- create an entry in the Field_Table. See Create_Syntactic_Field and -- Create_Semantic_Field for additional doc. procedure Check_Type (T : Node_Or_Entity_Type); -- Check some "legality" rules for types in the Gen_IL little language ---------------- -- Check_Type -- ---------------- procedure Check_Type (T : Node_Or_Entity_Type) is Im : constant String := Node_Or_Entity_Type'Image (T); begin if Type_Table (T) /= null then raise Illegal with "duplicate creation of type " & Image (T); end if; if T not in Root_Type then case T is when Node_Type => if Im'Length < 2 or else Im (1 .. 2) /= "N_" then raise Illegal with "Node type names must start with ""N_"""; end if; when Concrete_Entity => if Im'Length < 2 or else Im (1 .. 2) /= "E_" then raise Illegal with "Concrete entity type names must start with ""E_"""; end if; when others => null; -- No special prefix for abstract entities end case; end if; end Check_Type; ----------------- -- Create_Type -- ----------------- procedure Create_Type (T : Node_Or_Entity_Type; Parent : Opt_Abstract_Type; Fields : Field_Sequence; Nmake_Assert : String) is begin Check_Type (T); if T not in Root_Type then if Type_Table (Parent) = null then raise Illegal with "undefined parent type for " & Image (T) & " (parent is " & Image (Parent) & ")"; end if; if Type_Table (Parent).Is_Union then raise Illegal with "parent type for " & Image (T) & " must not be union (" & Image (Parent) & ")"; end if; end if; Type_Table (T) := new Type_Info' (Is_Union => False, Parent => Parent, Children | Concrete_Descendants => Type_Vectors.Empty_Vector, First | Last | Fields => <>, -- filled in later Nmake_Assert => new String'(Nmake_Assert)); if Parent /= No_Type then Append (Type_Table (Parent).Children, T); end if; -- Check that syntactic fields precede semantic fields. Note that this -- check is happening before we compute inherited fields. -- Exempt Chars and Actions from this rule, for now. declare Semantic_Seen : Boolean := False; begin for J in Fields'Range loop if Fields (J).Is_Syntactic then if Semantic_Seen then raise Illegal with "syntactic fields must precede semantic ones " & Image (T); end if; else if Fields (J).F not in Chars | Actions then Semantic_Seen := True; end if; end if; end loop; end; -- Check that node fields are in nodes, and entity fields are in -- entities. for J in Fields'Range loop declare Field : constant Field_Enum := Fields (J).F; Error_Prefix : constant String := "Field " & Image (T) & "." & Image (Field) & " not in "; begin case T is when Node_Type => if Field not in Node_Field then raise Illegal with Error_Prefix & "Node_Field"; end if; when Entity_Type => if Field not in Entity_Field then raise Illegal with Error_Prefix & "Entity_Field"; end if; when Type_Boundaries => raise Program_Error; -- dummy types shouldn't have fields end case; end; end loop; -- Compute the Have_This_Field component of fields, the Fields component -- of the current type, and Syntactic table. for J in Fields'Range loop declare Field : constant Field_Enum := Fields (J).F; Is_Syntactic : constant Boolean := Fields (J).Is_Syntactic; begin Append (Field_Table (Field).Have_This_Field, T); Append (Type_Table (T).Fields, Field); pragma Assert (not Syntactic (T) (Field)); Syntactic (T) (Field) := Is_Syntactic; end; end loop; end Create_Type; -- Other than constraint checks on T at the call site, and the lack of a -- parent for root types, the following six all do the same thing. --------------------------- -- Create_Root_Node_Type -- --------------------------- procedure Create_Root_Node_Type (T : Abstract_Node; Fields : Field_Sequence := No_Fields) is begin Create_Type (T, Parent => No_Type, Fields => Fields, Nmake_Assert => ""); end Create_Root_Node_Type; ------------------------------- -- Create_Abstract_Node_Type -- ------------------------------- procedure Create_Abstract_Node_Type (T : Abstract_Node; Parent : Abstract_Type; Fields : Field_Sequence := No_Fields) is begin Create_Type (T, Parent, Fields, Nmake_Assert => ""); end Create_Abstract_Node_Type; ------------------------------- -- Create_Concrete_Node_Type -- ------------------------------- procedure Create_Concrete_Node_Type (T : Concrete_Node; Parent : Abstract_Type; Fields : Field_Sequence := No_Fields; Nmake_Assert : String := "") is begin Create_Type (T, Parent, Fields, Nmake_Assert); end Create_Concrete_Node_Type; ----------------------------- -- Create_Root_Entity_Type -- ----------------------------- procedure Create_Root_Entity_Type (T : Abstract_Entity; Fields : Field_Sequence := No_Fields) is begin Create_Type (T, Parent => No_Type, Fields => Fields, Nmake_Assert => ""); end Create_Root_Entity_Type; --------------------------------- -- Create_Abstract_Entity_Type -- --------------------------------- procedure Create_Abstract_Entity_Type (T : Abstract_Entity; Parent : Abstract_Type; Fields : Field_Sequence := No_Fields) is begin Create_Type (T, Parent, Fields, Nmake_Assert => ""); end Create_Abstract_Entity_Type; --------------------------------- -- Create_Concrete_Entity_Type -- --------------------------------- procedure Create_Concrete_Entity_Type (T : Concrete_Entity; Parent : Abstract_Type; Fields : Field_Sequence := No_Fields) is begin Create_Type (T, Parent, Fields, Nmake_Assert => ""); end Create_Concrete_Entity_Type; ------------------ -- Create_Field -- ------------------ function Create_Field (Field : Field_Enum; Field_Type : Type_Enum; Default_Value : Field_Default_Value; Type_Only : Type_Only_Enum; Pre, Pre_Get, Pre_Set : String; Is_Syntactic : Boolean) return Field_Desc is begin -- Note that this function has the side effect of update the -- Field_Table. pragma Assert (if Default_Value /= No_Default then Is_Syntactic); pragma Assert (if Type_Only /= No_Type_Only then not Is_Syntactic); -- First time this field has been seen; create an entry in the -- Field_Table. if Field_Table (Field) = null then Field_Table (Field) := new Field_Info' (Type_Vectors.Empty_Vector, Field_Type, Default_Value, Type_Only, Pre => new String'(Pre), Pre_Get => new String'(Pre_Get), Pre_Set => new String'(Pre_Set), Offset => Unknown_Offset); -- The Field_Table entry has already been created by the 'then' part -- above. Now we're seeing the same field being "created" again in a -- different type. Here we check consistency of this new Create_Field -- call with the old one. else if Field_Type /= Field_Table (Field).Field_Type then raise Illegal with "mismatched field types for " & Image (Field); end if; -- Check that default values for syntactic fields match. This check -- could be stricter; it currently allows a field to have No_Default -- in one type, but something else in another type. In that case, we -- use the "something else" for all types. -- -- Note that the order of calls does not matter; a default value -- always overrides a No_Default value. if Is_Syntactic then if Default_Value /= Field_Table (Field).Default_Value then if Field_Table (Field).Default_Value = No_Default then Field_Table (Field).Default_Value := Default_Value; else raise Illegal with "mismatched default values for " & Image (Field); end if; end if; end if; if Type_Only /= Field_Table (Field).Type_Only then raise Illegal with "mismatched Type_Only for " & Image (Field); end if; if Pre /= Field_Table (Field).Pre.all then raise Illegal with "mismatched extra preconditions for " & Image (Field); end if; if Pre_Get /= Field_Table (Field).Pre_Get.all then raise Illegal with "mismatched extra getter-only preconditions for " & Image (Field); end if; if Pre_Set /= Field_Table (Field).Pre_Set.all then raise Illegal with "mismatched extra setter-only preconditions for " & Image (Field); end if; end if; return (Field, Is_Syntactic); end Create_Field; ---------------------------- -- Create_Syntactic_Field -- ---------------------------- function Create_Syntactic_Field (Field : Node_Field; Field_Type : Type_Enum; Default_Value : Field_Default_Value := No_Default; Pre, Pre_Get, Pre_Set : String := "") return Field_Desc is begin return Create_Field (Field, Field_Type, Default_Value, No_Type_Only, Pre, Pre_Get, Pre_Set, Is_Syntactic => True); end Create_Syntactic_Field; --------------------------- -- Create_Semantic_Field -- --------------------------- function Create_Semantic_Field (Field : Field_Enum; Field_Type : Type_Enum; Type_Only : Type_Only_Enum := No_Type_Only; Pre, Pre_Get, Pre_Set : String := "") return Field_Desc is begin return Create_Field (Field, Field_Type, No_Default, Type_Only, Pre, Pre_Get, Pre_Set, Is_Syntactic => False); end Create_Semantic_Field; ----------------------- -- Create_Union_Type -- ----------------------- procedure Create_Union_Type (Root : Root_Type; T : Abstract_Type; Children : Type_Array) is Children_Seen : Type_Set := (others => False); begin Check_Type (T); if Children'Length <= 1 then raise Illegal with Image (T) & " must have two or more children"; end if; for Child of Children loop if Children_Seen (Child) then raise Illegal with Image (T) & " has duplicate child " & Image (Child); end if; Children_Seen (Child) := True; if Type_Table (Child) = null then raise Illegal with "undefined child type for " & Image (T) & " (child is " & Image (Child) & ")"; end if; end loop; Type_Table (T) := new Type_Info' (Is_Union => True, Parent => Root, Children | Concrete_Descendants => Type_Vectors.Empty_Vector); for Child of Children loop Append (Type_Table (T).Children, Child); end loop; end Create_Union_Type; ---------------------------- -- Create_Node_Union_Type -- ---------------------------- procedure Create_Node_Union_Type (T : Abstract_Node; Children : Type_Array) is begin Create_Union_Type (Node_Kind, T, Children); end Create_Node_Union_Type; ------------------------------ -- Create_Entity_Union_Type -- ------------------------------ procedure Create_Entity_Union_Type (T : Abstract_Entity; Children : Type_Array) is begin Create_Union_Type (Entity_Kind, T, Children); end Create_Entity_Union_Type; ------------- -- Compile -- ------------- procedure Compile is Fields_Per_Node : Fields_Per_Node_Type := (others => (others => False)); Type_Bit_Size : array (Concrete_Type) of Bit_Offset := (others => 0); Min_Node_Bit_Size : Bit_Offset := Bit_Offset'Last; Max_Node_Bit_Size : Bit_Offset := 0; Min_Entity_Bit_Size : Bit_Offset := Bit_Offset'Last; Max_Entity_Bit_Size : Bit_Offset := 0; -- Above are in units of bits; following are in units of slots: Min_Node_Size : Field_Offset := Field_Offset'Last; Max_Node_Size : Field_Offset := 0; Min_Entity_Size : Field_Offset := Field_Offset'Last; Max_Entity_Size : Field_Offset := 0; Node_Field_Types_Used, Entity_Field_Types_Used : Type_Set; Setter_Needs_Parent : Field_Set := (Actions | Expression | Then_Actions | Else_Actions => True, others => False); -- Set of fields where the setter should set the Parent. True for -- syntactic fields of type Node_Id and List_Id, but with some -- exceptions. Expression is syntactic AND semantic, and the Parent -- is needed. Default_Expression is also both, but the Parent is not -- needed. Then_Actions and Else_Actions are not syntactic, but the -- Parent is needed. procedure Check_Completeness; -- Check that every type and field has been declared procedure Compute_Ranges (Root : Root_Type); -- Compute the range of Node_Kind/Entity_Kind values for all the types -- rooted at Root. The result is stored in the First and Last components -- in the Type_Table. procedure Compute_Fields_Per_Node; -- Compute which fields are in which nodes. Implements inheritance of -- fields. Set the Fields component of each Type_Info to include -- inherited ones. Set the Is_Syntactic component in the Type_Table to -- the set of fields that are syntactic in that node kind. Set the -- Fields_Per_Node table. procedure Compute_Field_Offsets; -- Compute the offsets of each field. The results are stored in the -- Offset components in the Field_Table. procedure Compute_Type_Sizes; -- Compute the size of each node and entity type, which is one more than -- the maximum bit offset of all fields of the type. Results are -- returned in the above Type_Bit_Size and Min_.../Max_... variables. procedure Check_For_Syntactic_Field_Mismatch; -- Check that fields are either all syntactic or all semantic in all -- nodes in which they exist, except for some fields that already -- violate this rule. -- -- Also sets Setter_Needs_Parent. function Field_Types_Used (First, Last : Field_Enum) return Type_Set; -- Returns the union of the types of all the fields in the range First -- .. Last. Only Special_Type; if the declared type of a field is a -- descendant of Node_Kind or Entity_Kind, then the low-level getter for -- Node_Id can be used. procedure Put_Seinfo; -- Print out the Seinfo package, which is with'ed by both Sinfo.Nodes -- and Einfo.Entities. procedure Put_Nodes; -- Print out the Sinfo.Nodes package spec and body procedure Put_Entities; -- Print out the Einfo.Entities package spec and body procedure Put_Type_And_Subtypes (S : in out Sink; Root : Root_Type); -- Called by Put_Nodes and Put_Entities to print out the main type -- and subtype declarations in Sinfo.Nodes and Einfo.Entities. procedure Put_Subp_Decls (S : in out Sink; Root : Root_Type); -- Called by Put_Nodes and Put_Entities to print out the subprogram -- declarations in Sinfo.Nodes and Einfo.Entities. procedure Put_Subp_Bodies (S : in out Sink; Root : Root_Type); -- Called by Put_Nodes and Put_Entities to print out the subprogram -- bodies in Sinfo.Nodes and Einfo.Entities. function Node_To_Fetch_From (F : Field_Enum) return String; -- Name of the Node from which a getter should fetch the value. -- Normally, we fetch from the node or entity passed in (i.e. formal -- parameter N). But if Type_Only was specified, we need to fetch the -- corresponding base (etc) type. procedure Put_Getter_Spec (S : in out Sink; F : Field_Enum); procedure Put_Setter_Spec (S : in out Sink; F : Field_Enum); procedure Put_Getter_Decl (S : in out Sink; F : Field_Enum); procedure Put_Setter_Decl (S : in out Sink; F : Field_Enum); procedure Put_Getter_Setter_Locals (S : in out Sink; F : Field_Enum; Get : Boolean); procedure Put_Getter_Body (S : in out Sink; F : Field_Enum); procedure Put_Setter_Body (S : in out Sink; F : Field_Enum); -- Print out the specification, declaration, or body of a getter or -- setter for the given field. procedure Put_Precondition (S : in out Sink; F : Field_Enum); -- Print out the precondition, if any, for a getter or setter for the -- given field. procedure Put_Casts (S : in out Sink; T : Type_Enum); -- Print out the Cast functions for a given type procedure Put_Traversed_Fields (S : in out Sink); -- Called by Put_Nodes to print out the Traversed_Fields table in -- Sinfo.Nodes. procedure Put_Tables (S : in out Sink; Root : Root_Type); -- Called by Put_Nodes and Put_Entities to print out the various tables -- in Sinfo.Nodes and Einfo.Entities. procedure Put_Nmake; -- Print out the Nmake package spec and body, containing -- Make_... functions for each concrete node type. procedure Put_Make_Decls (S : in out Sink; Root : Root_Type); -- Called by Put_Nmake to print out the Make_... function declarations procedure Put_Make_Bodies (S : in out Sink; Root : Root_Type); -- Called by Put_Nmake to print out the Make_... function bodies procedure Put_Make_Spec (S : in out Sink; Root : Root_Type; T : Concrete_Type); -- Called by Put_Make_Decls and Put_Make_Bodies to print out the spec of -- a single Make_... function. procedure Put_Seinfo_Tables; -- This puts information about both sinfo and einfo. -- Not actually needed by the compiler. procedure Put_Sinfo_Dot_H; -- Print out the sinfo.h file procedure Put_Einfo_Dot_H; -- Print out the einfo.h file procedure Put_C_Type_And_Subtypes (S : in out Sink; Root : Root_Type); -- Used by Put_Sinfo_Dot_H and Put_Einfo_Dot_H to print out the C code -- corresponding to the Ada Node_Kind, Entity_Kind, and subtypes -- thereof. procedure Put_C_Getters (S : in out Sink; Root : Root_Type); -- Used by Put_Sinfo_Dot_H and Put_Einfo_Dot_H to print out high-level -- getters. procedure Put_C_Getter (S : in out Sink; F : Field_Enum); -- Used by Put_C_Getters to print out one high-level getter. procedure Put_Union_Membership (S : in out Sink; Root : Root_Type; Only_Prototypes : Boolean); -- Used by Put_Sinfo_Dot_H and Put_Einfo_Dot_H to print out functions to -- test membership in a union type. ------------------------ -- Check_Completeness -- ------------------------ procedure Check_Completeness is begin for T in Node_Or_Entity_Type loop if Type_Table (T) = null and then T not in Type_Boundaries then raise Illegal with "Missing type declaration for " & Image (T); end if; end loop; for F in Field_Enum loop if Field_Table (F) = null and then F /= Between_Node_And_Entity_Fields then raise Illegal with "Missing field declaration for " & Image (F); end if; end loop; end Check_Completeness; -------------------- -- Compute_Ranges -- -------------------- procedure Compute_Ranges (Root : Root_Type) is procedure Do_One_Type (T : Node_Or_Entity_Type); -- Compute the range for one type. Passed to Iterate_Types to process -- all of them. procedure Add_Concrete_Descendant_To_Ancestors (Ancestor : Abstract_Type; Descendant : Concrete_Type); -- Add Descendant to the Concrete_Descendants of each of its -- ancestors. procedure Add_Concrete_Descendant_To_Ancestors (Ancestor : Abstract_Type; Descendant : Concrete_Type) is begin if Ancestor not in Root_Type then Add_Concrete_Descendant_To_Ancestors (Type_Table (Ancestor).Parent, Descendant); end if; Append (Type_Table (Ancestor).Concrete_Descendants, Descendant); end Add_Concrete_Descendant_To_Ancestors; procedure Do_One_Type (T : Node_Or_Entity_Type) is begin case T is when Concrete_Type => pragma Annotate (Codepeer, Modified, Type_Table); Type_Table (T).First := T; Type_Table (T).Last := T; Add_Concrete_Descendant_To_Ancestors (Type_Table (T).Parent, T); -- Parent cannot be No_Type here, because T is a concrete -- type, and therefore not a root type. when Abstract_Type => declare Children : Type_Vector renames Type_Table (T).Children; begin -- Ensure that an abstract type is not a leaf in the type -- hierarchy. if Is_Empty (Children) then raise Illegal with Image (T) & " has no children"; end if; -- We could support abstract types with only one child, -- but what's the point of having such a type? if Last_Index (Children) = 1 then raise Illegal with Image (T) & " has only one child"; end if; Type_Table (T).First := Type_Table (Children (1)).First; Type_Table (T).Last := Type_Table (Children (Last_Index (Children))).Last; end; when Between_Abstract_Entity_And_Concrete_Node_Types => raise Program_Error; end case; end Do_One_Type; begin Iterate_Types (Root, Post => Do_One_Type'Access); end Compute_Ranges; ----------------------------- -- Compute_Fields_Per_Node -- ----------------------------- procedure Compute_Fields_Per_Node is Duplicate_Fields_Found : Boolean := False; function Get_Fields (T : Node_Or_Entity_Type) return Field_Vector; -- Compute the fields of a given type. This is the fields inherited -- from ancestors, plus the fields declared for the type itself. function Get_Syntactic_Fields (T : Node_Or_Entity_Type) return Field_Set; -- Compute the set of fields that are syntactic for a given type. -- Note that a field can be syntactic in some node types, but -- semantic in others. procedure Do_Concrete_Type (CT : Concrete_Type); -- Do the Compute_Fields_Per_Node work for a concrete type function Get_Fields (T : Node_Or_Entity_Type) return Field_Vector is Parent_Fields : constant Field_Vector := (if T in Root_Type then Field_Vectors.Empty_Vector else Get_Fields (Type_Table (T).Parent)); begin return Parent_Fields & Type_Table (T).Fields; end Get_Fields; function Get_Syntactic_Fields (T : Node_Or_Entity_Type) return Field_Set is Parent_Is_Syntactic : constant Field_Set := (if T in Root_Type then (Field_Enum => False) else Get_Syntactic_Fields (Type_Table (T).Parent)); begin return Parent_Is_Syntactic or Syntactic (T); end Get_Syntactic_Fields; procedure Do_Concrete_Type (CT : Concrete_Type) is begin Type_Table (CT).Fields := Get_Fields (CT); Syntactic (CT) := Get_Syntactic_Fields (CT); for F of Type_Table (CT).Fields loop if Fields_Per_Node (CT) (F) then Ada.Text_IO.Put_Line ("duplicate field" & Image (CT) & Image (F)); Duplicate_Fields_Found := True; end if; Fields_Per_Node (CT) (F) := True; end loop; end Do_Concrete_Type; begin -- Compute_Fields_Per_Node for CT in Concrete_Node loop Do_Concrete_Type (CT); end loop; -- The node fields defined for all three N_Entity kinds should be the -- same: if Type_Table (N_Defining_Character_Literal).Fields /= Type_Table (N_Defining_Identifier).Fields then raise Illegal with "fields for N_Defining_Identifier and " & "N_Defining_Character_Literal must match"; end if; if Type_Table (N_Defining_Operator_Symbol).Fields /= Type_Table (N_Defining_Identifier).Fields then raise Illegal with "fields for N_Defining_Identifier and " & "N_Defining_Operator_Symbol must match"; end if; if Fields_Per_Node (N_Defining_Character_Literal) /= Fields_Per_Node (N_Defining_Identifier) then raise Illegal with "Fields of N_Defining_Character_Literal must match " & "N_Defining_Identifier"; end if; if Fields_Per_Node (N_Defining_Operator_Symbol) /= Fields_Per_Node (N_Defining_Identifier) then raise Illegal with "Fields of N_Defining_Operator_Symbol must match " & "N_Defining_Identifier"; end if; -- Copy node fields from N_Entity nodes to entities, so they have -- slots allocated (but the getters and setters are only in -- Sinfo.Nodes). Type_Table (Entity_Kind).Fields := Type_Table (N_Defining_Identifier).Fields & Type_Table (Entity_Kind).Fields; for CT in Concrete_Entity loop Do_Concrete_Type (CT); end loop; if Duplicate_Fields_Found then raise Illegal with "duplicate fields found"; end if; end Compute_Fields_Per_Node; function Field_Size (T : Type_Enum) return Bit_Offset is (case T is when Flag => 1, when Small_Paren_Count_Type | Component_Alignment_Kind => 2, when Node_Kind_Type | Entity_Kind_Type | Convention_Id => 8, when Mechanism_Type | List_Id | Elist_Id | Name_Id | String_Id | Uint | Uint_Subtype | Ureal | Source_Ptr | Union_Id | Node_Id | Node_Or_Entity_Type => 32, when Between_Special_And_Abstract_Node_Types => -- can't happen Bit_Offset'Last); -- Size in bits of a a field of type T. It must be a power of 2, and -- must match the size of the type in GNAT, which sometimes requires -- a Size clause in GNAT. -- -- Note that this is not the same as Type_Bit_Size of the field's -- type. For one thing, Type_Bit_Size only covers concrete node and -- entity types, which does not include most of the above. For -- another thing, Type_Bit_Size includes the full size of all the -- fields, whereas a field of a node or entity type is just a 32-bit -- Node_Id or Entity_Id; i.e. it is indirect. function Field_Size (F : Field_Enum) return Bit_Offset is (Field_Size (Field_Table (F).Field_Type)); function To_Bit_Offset (F : Field_Enum; Offset : Field_Offset'Base) return Bit_Offset'Base is (Bit_Offset'Base (Offset) * Field_Size (F)); function First_Bit (F : Field_Enum; Offset : Field_Offset) return Bit_Offset is (To_Bit_Offset (F, Offset)); function Last_Bit (F : Field_Enum; Offset : Field_Offset) return Bit_Offset is (To_Bit_Offset (F, Offset + 1) - 1); function To_Size_In_Slots (Size_In_Bits : Bit_Offset) return Field_Offset is ((Field_Offset (Size_In_Bits) + (SS - 1)) / SS); function Type_Size_In_Slots (T : Concrete_Type) return Field_Offset is (To_Size_In_Slots (Type_Bit_Size (T))); -- rounded up to slot boundary function Type_Bit_Size_Aligned (T : Concrete_Type) return Bit_Offset is (Bit_Offset (Type_Size_In_Slots (T)) * SS); -- multiple of slot size --------------------------- -- Compute_Field_Offsets -- --------------------------- procedure Compute_Field_Offsets is type Offset_Set_Unconstrained is array (Bit_Offset range <>) of Boolean with Pack; subtype Offset_Set is Offset_Set_Unconstrained (Bit_Offset); Offset_Sets : array (Concrete_Type) of Offset_Set := (others => (others => False)); function All_False (F : Field_Enum; Offset : Field_Offset) return Offset_Set_Unconstrained is (First_Bit (F, Offset) .. Last_Bit (F, Offset) => False); function All_True (F : Field_Enum; Offset : Field_Offset) return Offset_Set_Unconstrained is (First_Bit (F, Offset) .. Last_Bit (F, Offset) => True); function Offset_OK (F : Field_Enum; Offset : Field_Offset) return Boolean; -- True if it is OK to choose this offset; that is, if this offset is -- not in use for any type that has the field. If Overlay_Fields is -- False, then "any type that has the field" --> "any type, whether -- or not it has the field". procedure Set_Offset_In_Use (F : Field_Enum; Offset : Field_Offset); -- Mark the offset as "in use" procedure Choose_Offset (F : Field_Enum); -- Choose an offset for this field function Offset_OK (F : Field_Enum; Offset : Field_Offset) return Boolean is begin for T in Concrete_Type loop if Fields_Per_Node (T) (F) or else not Overlay_Fields then declare Bits : Offset_Set_Unconstrained renames Offset_Sets (T) (First_Bit (F, Offset) .. Last_Bit (F, Offset)); begin if Bits /= All_False (F, Offset) then return False; end if; end; end if; end loop; return True; end Offset_OK; procedure Set_Offset_In_Use (F : Field_Enum; Offset : Field_Offset) is begin for T in Concrete_Type loop if Fields_Per_Node (T) (F) then declare Bits : Offset_Set_Unconstrained renames Offset_Sets (T) (First_Bit (F, Offset) .. Last_Bit (F, Offset)); begin pragma Assert (Bits = All_False (F, Offset)); Bits := All_True (F, Offset); end; end if; end loop; end Set_Offset_In_Use; procedure Choose_Offset (F : Field_Enum) is begin for Offset in Field_Offset loop if Offset_OK (F, Offset) then Set_Offset_In_Use (F, Offset); Field_Table (F).Offset := Offset; return; end if; end loop; raise Illegal with "No available field offset for " & Image (F) & "; need to increase Gen_IL.Internals.Bit_Offset'Last (" & Image (Gen_IL.Internals.Bit_Offset'Last) & " is too small)"; end Choose_Offset; Weighted_Node_Frequency : array (Field_Enum) of Type_Count := (others => 0); -- Number of concrete types that have each field function More_Types_Have_Field (F1, F2 : Field_Enum) return Boolean is (Weighted_Node_Frequency (F1) > Weighted_Node_Frequency (F2)); -- True if F1 appears in more concrete types than F2 function Sort_Less (F1, F2 : Field_Enum) return Boolean is (if Weighted_Node_Frequency (F1) = Weighted_Node_Frequency (F2) then F1 < F2 else More_Types_Have_Field (F1, F2)); package Sorting is new Field_Vectors.Generic_Sorting ("<" => Sort_Less); All_Fields : Field_Vector; -- Start of processing for Compute_Field_Offsets begin -- Compute the number of types that have each field, weighted by the -- frequency of such nodes. for T in Concrete_Type loop for F in Field_Enum loop if Fields_Per_Node (T) (F) then Weighted_Node_Frequency (F) := Weighted_Node_Frequency (F) + Type_Frequency (T); end if; end loop; end loop; -- Collect all the fields in All_Fields for F in Node_Field loop Append (All_Fields, F); end loop; for F in Entity_Field loop Append (All_Fields, F); end loop; -- Sort All_Fields based on how many concrete types have the field. -- This is for efficiency; we want to choose the offsets of the most -- common fields first, so they get low numbers. Sorting.Sort (All_Fields); -- Go through all the fields, and choose the lowest offset that is -- free in all types that have the field. This is basically a -- graph-coloring algorithm on the interference graph. The -- interference graph is an undirected graph with the fields being -- nodes (not nodes in the compiler!) in the graph, and an edge -- between a pair of fields if they appear in the same node in the -- compiler. The "colors" are fields offsets, except that a -- complication compared to standard graph coloring is that fields -- are different sizes. -- First choose offsets for some heavily-used fields, so they will -- get low offsets, so they will wind up in the node header for -- faster access. Choose_Offset (Nkind); pragma Assert (Field_Table (Nkind).Offset = 0); Choose_Offset (Ekind); pragma Assert (Field_Table (Ekind).Offset = 1); Choose_Offset (Homonym); pragma Assert (Field_Table (Homonym).Offset = 1); Choose_Offset (Is_Immediately_Visible); pragma Assert (Field_Table (Is_Immediately_Visible).Offset = 16); Choose_Offset (From_Limited_With); pragma Assert (Field_Table (From_Limited_With).Offset = 17); Choose_Offset (Is_Potentially_Use_Visible); pragma Assert (Field_Table (Is_Potentially_Use_Visible).Offset = 18); Choose_Offset (Is_Generic_Instance); pragma Assert (Field_Table (Is_Generic_Instance).Offset = 19); Choose_Offset (Scope); pragma Assert (Field_Table (Scope).Offset = 2); -- Then loop through them all, skipping the ones we did above for F of All_Fields loop if Field_Table (F).Offset = Unknown_Offset then Choose_Offset (F); end if; end loop; end Compute_Field_Offsets; ------------------------ -- Compute_Type_Sizes -- ------------------------ procedure Compute_Type_Sizes is begin for T in Concrete_Type loop declare Max_Offset : Bit_Offset := 0; begin for F in Field_Enum loop if Fields_Per_Node (T) (F) then Max_Offset := Bit_Offset'Max (Max_Offset, To_Bit_Offset (F, Field_Table (F).Offset)); end if; end loop; -- No type can be smaller than the header slots Type_Bit_Size (T) := Bit_Offset'Max (Max_Offset + 1, SS * Num_Header_Slots); end; end loop; for T in Concrete_Node loop Min_Node_Bit_Size := Bit_Offset'Min (Min_Node_Bit_Size, Type_Bit_Size (T)); Max_Node_Bit_Size := Bit_Offset'Max (Max_Node_Bit_Size, Type_Bit_Size (T)); end loop; for T in Concrete_Entity loop Min_Entity_Bit_Size := Bit_Offset'Min (Min_Entity_Bit_Size, Type_Bit_Size (T)); Max_Entity_Bit_Size := Bit_Offset'Max (Max_Entity_Bit_Size, Type_Bit_Size (T)); end loop; Min_Node_Size := To_Size_In_Slots (Min_Node_Bit_Size); Max_Node_Size := To_Size_In_Slots (Max_Node_Bit_Size); Min_Entity_Size := To_Size_In_Slots (Min_Entity_Bit_Size); Max_Entity_Size := To_Size_In_Slots (Max_Entity_Bit_Size); end Compute_Type_Sizes; ---------------------------------------- -- Check_For_Syntactic_Field_Mismatch -- ---------------------------------------- procedure Check_For_Syntactic_Field_Mismatch is begin for F in Field_Enum loop if F /= Between_Node_And_Entity_Fields then declare Syntactic_Seen, Semantic_Seen : Boolean := False; Have_Field : Type_Vector renames Field_Table (F).Have_This_Field; begin for J in 1 .. Last_Index (Have_Field) loop if Syntactic (Have_Field (J)) (F) then Syntactic_Seen := True; else Semantic_Seen := True; end if; end loop; -- The following fields violate this rule. We might want to -- simplify by getting rid of these cases, but we allow them -- for now. At least, we don't want to add any new cases of -- syntactic/semantic mismatch. if F in Chars | Actions | Expression | Default_Expression then pragma Assert (Syntactic_Seen and Semantic_Seen); else if Syntactic_Seen and Semantic_Seen then raise Illegal with "syntactic/semantic mismatch for " & Image (F); end if; if Field_Table (F).Field_Type in Traversed_Field_Type and then Syntactic_Seen then Setter_Needs_Parent (F) := True; end if; end if; end; end if; end loop; end Check_For_Syntactic_Field_Mismatch; ---------------------- -- Field_Types_Used -- ---------------------- function Field_Types_Used (First, Last : Field_Enum) return Type_Set is Result : Type_Set := (others => False); begin for F in First .. Last loop if Field_Table (F).Field_Type in Node_Or_Entity_Type then Result (Node_Id) := True; -- Subtypes of Uint all use the same Cast for Uint elsif Field_Table (F).Field_Type in Uint_Subtype then Result (Uint) := True; else Result (Field_Table (F).Field_Type) := True; end if; end loop; return Result; end Field_Types_Used; pragma Style_Checks ("M120"); -- Lines of the form Put (S, "..."); are more readable if we relax the -- line length. We really just want the "..." to be short enough. --------------------------- -- Put_Type_And_Subtypes -- --------------------------- procedure Put_Type_And_Subtypes (S : in out Sink; Root : Root_Type) is procedure Put_Enum_Type; -- Print out the enumeration type declaration for a root type -- (Node_Kind or Entity_Kind). procedure Put_Kind_Subtype (T : Node_Or_Entity_Type); -- Print out a subrange (of type Node_Kind or Entity_Kind) for a -- given nonroot abstract type. procedure Put_Id_Subtype (T : Node_Or_Entity_Type); -- Print out a subtype (of type Node_Id or Entity_Id) for a given -- nonroot abstract type. procedure Put_Opt_Subtype (T : Node_Or_Entity_Type); -- Print out an "optional" subtype; that is, one that allows -- Empty. Their names start with "Opt_". procedure Put_Enum_Type is procedure Put_Enum_Lit (T : Node_Or_Entity_Type); -- Print out one enumeration literal in the declaration of -- Node_Kind or Entity_Kind. First_Time : Boolean := True; procedure Put_Enum_Lit (T : Node_Or_Entity_Type) is begin if T in Concrete_Type then if First_Time then First_Time := False; else Put (S, "," & LF); end if; Put (S, Image (T)); end if; end Put_Enum_Lit; type Dummy is array (First_Concrete (Root) .. Last_Concrete (Root)) of Boolean; Num_Types : constant Root_Int := Dummy'Length; begin Put (S, "type " & Image (Root) & " is -- " & Image (Num_Types) & " " & Image (Root) & "s" & LF); Increase_Indent (S, 2); Put (S, "("); Increase_Indent (S, 1); Iterate_Types (Root, Pre => Put_Enum_Lit'Access); Decrease_Indent (S, 1); Put (S, LF & ") with Size => 8; -- " & Image (Root) & LF & LF); Decrease_Indent (S, 2); end Put_Enum_Type; procedure Put_Kind_Subtype (T : Node_Or_Entity_Type) is begin if T in Abstract_Type then if Type_Table (T).Is_Union then pragma Assert (Type_Table (T).Parent = Root); Put (S, "subtype " & Image (T) & " is" & LF); Increase_Indent (S, 2); Put (S, Image (Root) & " with Predicate =>" & LF); Increase_Indent (S, 2); Put (S, Image (T) & " in" & LF); Put_Types_With_Bars (S, Type_Table (T).Children); Decrease_Indent (S, 2); Put (S, ";" & LF); Decrease_Indent (S, 2); elsif Type_Table (T).Parent /= No_Type then Put (S, "subtype " & Image (T) & " is " & Image (Type_Table (T).Parent) & " range" & LF); Increase_Indent (S, 2); Put (S, Image (Type_Table (T).First) & " .. " & Image (Type_Table (T).Last) & ";" & LF); Decrease_Indent (S, 2); Increase_Indent (S, 3); for J in 1 .. Type_Table (T).Concrete_Descendants.Last_Index loop Put (S, "-- " & Image (Type_Table (T).Concrete_Descendants (J)) & LF); end loop; Decrease_Indent (S, 3); end if; end if; end Put_Kind_Subtype; procedure Put_Id_Subtype (T : Node_Or_Entity_Type) is begin if Type_Table (T).Parent /= No_Type then Put (S, "subtype " & Id_Image (T) & " is" & LF); Increase_Indent (S, 2); Put (S, Id_Image (Type_Table (T).Parent)); if Enable_Assertions then Put (S, " with Predicate =>" & LF); Increase_Indent (S, 2); Put (S, "K (" & Id_Image (T) & ") in " & Image (T)); Decrease_Indent (S, 2); end if; Put (S, ";" & LF); Decrease_Indent (S, 2); end if; end Put_Id_Subtype; procedure Put_Opt_Subtype (T : Node_Or_Entity_Type) is begin if Type_Table (T).Parent /= No_Type then Put (S, "subtype Opt_" & Id_Image (T) & " is" & LF); Increase_Indent (S, 2); Put (S, Id_Image (Root)); -- Assert that the Opt_XXX subtype is empty or in the XXX -- subtype. if Enable_Assertions then Put (S, " with Predicate =>" & LF); Increase_Indent (S, 2); Put (S, "Opt_" & Id_Image (T) & " = Empty or else" & LF); Put (S, "Opt_" & Id_Image (T) & " in " & Id_Image (T)); Decrease_Indent (S, 2); end if; Put (S, ";" & LF); Decrease_Indent (S, 2); end if; end Put_Opt_Subtype; begin -- Put_Type_And_Subtypes Put_Enum_Type; -- Put the getter for Nkind and Ekind here, earlier than the other -- getters, because it is needed in predicates of the following -- subtypes. case Root is when Node_Kind => Put_Getter_Decl (S, Nkind); Put (S, "function K (N : Node_Id) return Node_Kind renames " & Image (Nkind) & ";" & LF); Put (S, "-- Shorthand for use in predicates and preconditions below" & LF); Put (S, "-- There is no procedure Set_Nkind." & LF); Put (S, "-- See Init_Nkind and Mutate_Nkind in Atree." & LF & LF); when Entity_Kind => Put_Getter_Decl (S, Ekind); Put (S, "function K (N : Entity_Id) return Entity_Kind renames Ekind;" & LF); Put (S, "-- Shorthand for use in predicates and preconditions below" & LF); Put (S, "-- There is no procedure Set_Ekind here." & LF); Put (S, "-- See Mutate_Ekind in Atree." & LF & LF); when others => raise Program_Error; end case; Put (S, "-- Subtypes of " & Image (Root) & " for each abstract type:" & LF & LF); Put (S, "pragma Style_Checks (""M200"");" & LF); Iterate_Types (Root, Pre => Put_Kind_Subtype'Access); Put (S, LF & "-- Subtypes of " & Id_Image (Root) & " with specified " & Image (Root) & "." & LF); Put (S, "-- These may be used in place of " & Id_Image (Root) & " for better documentation," & LF); Put (S, "-- and if assertions are enabled, for run-time checking." & LF & LF); Iterate_Types (Root, Pre => Put_Id_Subtype'Access); Put (S, LF & "-- Union types (nonhierarchical subtypes of " & Id_Image (Root) & ")" & LF & LF); for T in First_Abstract (Root) .. Last_Abstract (Root) loop if Type_Table (T) /= null and then Type_Table (T).Is_Union then Put_Kind_Subtype (T); Put_Id_Subtype (T); end if; end loop; Put (S, LF & "-- Optional subtypes of " & Id_Image (Root) & "." & " These allow Empty." & LF & LF); Iterate_Types (Root, Pre => Put_Opt_Subtype'Access); Put (S, LF & "-- Optional union types:" & LF & LF); for T in First_Abstract (Root) .. Last_Abstract (Root) loop if Type_Table (T) /= null and then Type_Table (T).Is_Union then Put_Opt_Subtype (T); end if; end loop; Put (S, LF & "subtype Flag is Boolean;" & LF & LF); end Put_Type_And_Subtypes; ------------------------------------------- -- Put_Casts -- ------------------------------------------- procedure Put_Casts (S : in out Sink; T : Type_Enum) is Pre : constant String := "function Cast is new Unchecked_Conversion ("; Lo_Type : constant String := "Field_Size_" & Image (Field_Size (T)) & "_Bit"; Hi_Type : constant String := Get_Set_Id_Image (T); begin if T not in Uint_Subtype then if T not in Node_Kind_Type | Entity_Kind_Type then Put (S, Pre & Hi_Type & ", " & Lo_Type & ");" & LF); end if; Put (S, Pre & Lo_Type & ", " & Hi_Type & ");" & LF); end if; end Put_Casts; ---------------------- -- Put_Precondition -- ---------------------- procedure Put_Precondition (S : in out Sink; F : Field_Enum) is -- If the field is present in all entities, we want to assert that -- N in N_Entity_Id. If the field is present in only some entities, -- we don't need that, because we are fetching Ekind in that case, -- which will assert N in N_Entity_Id. Is_Entity : constant String := (if Field_Table (F).Have_This_Field = All_Entities then "N in N_Entity_Id" else ""); begin -- If this is an entity field, then we should assert that N is an -- entity. We need "N in A | B | ..." unless this is embodied in a -- subtype predicate. -- -- We can't put the extra "Pre => ..." specified on the call to -- Create_..._Field as part of the precondition, because some of -- them call things that are not visible here. if Enable_Assertions then if Length (Field_Table (F).Have_This_Field) = 1 or else Field_Table (F).Have_This_Field = Nodes_And_Entities then if Is_Entity /= "" then Increase_Indent (S, 1); Put (S, ", Pre =>" & LF); Put (S, Is_Entity); Decrease_Indent (S, 1); end if; else Put (S, ", Pre =>" & LF); Increase_Indent (S, 1); Put (S, "N in "); Put_Type_Ids_With_Bars (S, Field_Table (F).Have_This_Field); pragma Assert (Is_Entity = ""); Decrease_Indent (S, 1); end if; end if; end Put_Precondition; function Root_Type_For_Field (F : Field_Enum) return Root_Type is (case F is when Node_Field => Node_Kind, when Entity_Field => Entity_Kind, when Between_Node_And_Entity_Fields => Node_Kind); -- can't happen function N_Type (F : Field_Enum) return String is (if Length (Field_Table (F).Have_This_Field) = 1 then Id_Image (Field_Table (F).Have_This_Field (1)) else Id_Image (Root_Type_For_Field (F))); -- Name of the parameter type of the N parameter of the getter and -- setter for field F. If there's only one Have_This_Field, use that; -- the predicate will check for the right Kind. Otherwise, we use -- Node_Id or Entity_Id, and the getter and setter will have -- preconditions. procedure Put_Get_Set_Incr (S : in out Sink; F : Field_Enum; Get_Or_Set : String) with Pre => Get_Or_Set in "Get" | "Set"; -- If statistics are enabled, put the appropriate increment statement ---------------------- -- Put_Get_Set_Incr -- ---------------------- procedure Put_Get_Set_Incr (S : in out Sink; F : Field_Enum; Get_Or_Set : String) is begin if Statistics_Enabled then Put (S, "Atree." & Get_Or_Set & "_Count (" & F_Image (F) & ") := Atree." & Get_Or_Set & "_Count (" & F_Image (F) & ") + 1;" & LF); end if; end Put_Get_Set_Incr; ------------------------ -- Node_To_Fetch_From -- ------------------------ function Node_To_Fetch_From (F : Field_Enum) return String is begin return (case Field_Table (F).Type_Only is when No_Type_Only => "N", when Base_Type_Only => "Base_Type (N)", when Impl_Base_Type_Only => "Implementation_Base_Type (N)", when Root_Type_Only => "Root_Type (N)"); end Node_To_Fetch_From; --------------------- -- Put_Getter_Spec -- --------------------- procedure Put_Getter_Spec (S : in out Sink; F : Field_Enum) is begin Put (S, "function " & Image (F)); Put (S, " (N : " & N_Type (F) & ") return " & Get_Set_Id_Image (Field_Table (F).Field_Type)); end Put_Getter_Spec; --------------------- -- Put_Getter_Decl -- --------------------- procedure Put_Getter_Decl (S : in out Sink; F : Field_Enum) is begin Put_Getter_Spec (S, F); Put (S, " with " & Inline); Increase_Indent (S, 2); Put_Precondition (S, F); Decrease_Indent (S, 2); Put (S, ";" & LF); end Put_Getter_Decl; ------------------------------ -- Put_Getter_Setter_Locals -- ------------------------------ procedure Put_Getter_Setter_Locals (S : in out Sink; F : Field_Enum; Get : Boolean) is Rec : Field_Info renames Field_Table (F).all; F_Size : constant Bit_Offset := Field_Size (Rec.Field_Type); Off : constant Field_Offset := Rec.Offset; F_Per_Slot : constant Field_Offset := SS / Field_Offset (Field_Size (Rec.Field_Type)); Slot_Off : constant Field_Offset := Off / F_Per_Slot; In_NH : constant Boolean := Slot_Off < Num_Header_Slots; N : constant String := (if Get then Node_To_Fetch_From (F) else "N"); begin Put (S, " is" & LF); Increase_Indent (S, 3); Put (S, "-- " & Image (F_Per_Slot) & " " & Image (F_Size) & "-bit fields per " & SSS & "-bit slot." & LF); Put (S, "-- Offset " & Image (Off) & " = " & Image (Slot_Off) & " slots + " & Image (Off mod F_Per_Slot) & " fields in slot." & LF & LF); Put (S, "Off : constant := " & Image (Off) & ";" & LF); Put (S, "F_Size : constant := " & Image (F_Size) & ";" & LF); if Field_Size (Rec.Field_Type) /= SS then Put (S, "Mask : constant := 2**F_Size - 1;" & LF); end if; Put (S, "F_Per_Slot : constant Field_Offset := Slot_Size / F_Size;" & LF); Put (S, "Slot_Off : constant Field_Offset := Off / F_Per_Slot;" & LF); if In_NH then Put (S, "S : Slot renames Node_Offsets.Table (" & N & ").Slots (Slot_Off);" & LF); else Put (S, "S : Slot renames Slots.Table (Node_Offsets.Table (" & N & ").Offset + Slot_Off);" & LF); end if; if Field_Size (Rec.Field_Type) /= SS then Put (S, "V : constant Natural := Natural ((Off mod F_Per_Slot) * F_Size);" & LF); Put (S, LF); end if; end Put_Getter_Setter_Locals; --------------------- -- Put_Getter_Body -- --------------------- procedure Put_Getter_Body (S : in out Sink; F : Field_Enum) is Rec : Field_Info renames Field_Table (F).all; F_Size : constant Bit_Offset := Field_Size (Rec.Field_Type); T : constant String := Get_Set_Id_Image (Rec.Field_Type); begin -- Note that we store the result in a local constant below, so that -- the "Pre => ..." can refer to it. The constant is called Val so -- that it has the same name as the formal of the setter, so the -- "Pre => ..." can refer to it by the same name in both getter -- and setter. Put_Getter_Spec (S, F); Put_Getter_Setter_Locals (S, F, Get => True); Put (S, "Raw : constant Field_Size_" & Image (F_Size) & "_Bit :=" & LF); Increase_Indent (S, 2); Put (S, "Field_Size_" & Image (F_Size) & "_Bit ("); if Field_Size (Rec.Field_Type) /= SS then Put (S, "Shift_Right (S, V) and Mask);" & LF); else Put (S, "S);" & LF); end if; Decrease_Indent (S, 2); Put (S, "Val : constant " & T & " :="); if Field_Has_Special_Default (Rec.Field_Type) then pragma Assert (Field_Size (Rec.Field_Type) = 32); Put (S, LF); Increase_Indent (S, 2); Put (S, "(if Raw = 0 then " & Special_Default (Rec.Field_Type) & " else " & "Cast (Raw));"); Decrease_Indent (S, 2); else Put (S, " Cast (Raw);"); end if; Put (S, LF); Decrease_Indent (S, 3); Put (S, "begin" & LF); Increase_Indent (S, 3); Put (S, "-- pragma Debug (Validate_Node_And_Offset (NN, Slot_Off));" & LF); -- Comment out the validation, because it's too slow, and because the -- relevant routines in Atree are not visible. if Rec.Pre.all /= "" then Put (S, "pragma Assert (" & Rec.Pre.all & ");" & LF); end if; if Rec.Pre_Get.all /= "" then Put (S, "pragma Assert (" & Rec.Pre_Get.all & ");" & LF); end if; Put_Get_Set_Incr (S, F, "Get"); Put (S, "return Val;" & LF); Decrease_Indent (S, 3); Put (S, "end " & Image (F) & ";" & LF & LF); end Put_Getter_Body; --------------------- -- Put_Setter_Spec -- --------------------- procedure Put_Setter_Spec (S : in out Sink; F : Field_Enum) is Rec : Field_Info renames Field_Table (F).all; Default : constant String := (if Rec.Field_Type = Flag then " := True" else ""); begin Put (S, "procedure Set_" & Image (F)); Put (S, " (N : " & N_Type (F) & "; Val : " & Get_Set_Id_Image (Rec.Field_Type) & Default & ")"); end Put_Setter_Spec; --------------------- -- Put_Setter_Decl -- --------------------- procedure Put_Setter_Decl (S : in out Sink; F : Field_Enum) is begin Put_Setter_Spec (S, F); Put (S, " with " & Inline); Increase_Indent (S, 2); Put_Precondition (S, F); Decrease_Indent (S, 2); Put (S, ";" & LF); end Put_Setter_Decl; --------------------- -- Put_Setter_Body -- --------------------- procedure Put_Setter_Body (S : in out Sink; F : Field_Enum) is Rec : Field_Info renames Field_Table (F).all; F_Size : constant Bit_Offset := Field_Size (Rec.Field_Type); -- If Type_Only was specified in the call to Create_Semantic_Field, -- then we assert that the node is a base type. We cannot assert that -- it is an implementation base type or a root type. Type_Only_Assertion : constant String := (case Rec.Type_Only is when No_Type_Only => "", when Base_Type_Only | Impl_Base_Type_Only | Root_Type_Only => "Is_Base_Type (N)"); begin Put_Setter_Spec (S, F); Put_Getter_Setter_Locals (S, F, Get => False); Put (S, "Raw : constant Field_Size_" & Image (F_Size) & "_Bit := Cast (Val);" & LF); Decrease_Indent (S, 3); Put (S, "begin" & LF); Increase_Indent (S, 3); Put (S, "-- pragma Debug (Validate_Node_And_Offset_Write (N, Slot_Off));" & LF); -- Comment out the validation, because it's too slow, and because the -- relevant routines in Atree are not visible. if Rec.Pre.all /= "" then Put (S, "pragma Assert (" & Rec.Pre.all & ");" & LF); end if; if Rec.Pre_Set.all /= "" then Put (S, "pragma Assert (" & Rec.Pre_Set.all & ");" & LF); end if; if Type_Only_Assertion /= "" then Put (S, "pragma Assert (" & Type_Only_Assertion & ");" & LF); end if; if Setter_Needs_Parent (F) then declare Err : constant String := (if Rec.Field_Type = List_Id then "Error_List" else "Error"); begin Put (S, "if Present (Val) and then Val /= " & Err & " then" & LF); Increase_Indent (S, 3); Put (S, "pragma Warnings (Off, ""actuals for this call may be in wrong order"");" & LF); Put (S, "Set_Parent (Val, N);" & LF); Put (S, "pragma Warnings (On, ""actuals for this call may be in wrong order"");" & LF); Decrease_Indent (S, 3); Put (S, "end if;" & LF & LF); end; end if; if Field_Size (Rec.Field_Type) /= SS then Put (S, "S := (S and not Shift_Left (Mask, V)) or Shift_Left (Slot (Raw), V);" & LF); else Put (S, "S := Slot (Raw);" & LF); end if; Put_Get_Set_Incr (S, F, "Set"); Decrease_Indent (S, 3); Put (S, "end Set_" & Image (F) & ";" & LF & LF); end Put_Setter_Body; -------------------- -- Put_Subp_Decls -- -------------------- procedure Put_Subp_Decls (S : in out Sink; Root : Root_Type) is -- Note that there are several fields that are defined for both nodes -- and entities, such as Nkind. These are allocated slots in both, -- but here we only put out getters and setters in Sinfo.Nodes, not -- Einfo.Entities. begin Put (S, "-- Getters and setters for fields" & LF); for F in First_Field (Root) .. Last_Field (Root) loop -- Nkind/Ekind getter is already done (see Put_Type_And_Subtypes), -- and there is no setter for these. if F = Nkind then Put (S, LF & "-- Nkind getter is above" & LF); elsif F = Ekind then Put (S, LF & "-- Ekind getter is above" & LF); else Put_Getter_Decl (S, F); Put_Setter_Decl (S, F); end if; Put (S, LF); end loop; end Put_Subp_Decls; --------------------- -- Put_Subp_Bodies -- --------------------- procedure Put_Subp_Bodies (S : in out Sink; Root : Root_Type) is begin Put (S, LF & "-- Getters and setters for fields" & LF & LF); for F in First_Field (Root) .. Last_Field (Root) loop Put_Getter_Body (S, F); if F not in Nkind | Ekind then Put_Setter_Body (S, F); end if; end loop; end Put_Subp_Bodies; -------------------------- -- Put_Traversed_Fields -- -------------------------- procedure Put_Traversed_Fields (S : in out Sink) is function Is_Traversed_Field (T : Concrete_Node; F : Field_Enum) return Boolean; -- True if F is a field that should be traversed by Traverse_Func. In -- particular, True if F is a syntactic field of T, and is of a -- Node_Id or List_Id type. function Init_Max_Traversed_Fields return Field_Offset; -- Compute the maximum number of syntactic fields that are of type -- Node_Id or List_Id over all node types. procedure Put_Aggregate (T : Node_Or_Entity_Type); -- Print out the subaggregate for one type function Is_Traversed_Field (T : Concrete_Node; F : Field_Enum) return Boolean is begin return Syntactic (T) (F) and then Field_Table (F).Field_Type in Traversed_Field_Type; end Is_Traversed_Field; First_Time : Boolean := True; procedure Put_Aggregate (T : Node_Or_Entity_Type) is Left_Opnd_Skipped : Boolean := False; begin if T in Concrete_Node then if First_Time then First_Time := False; else Put (S, "," & LF); end if; Put (S, Image (T) & " => ("); Increase_Indent (S, 2); for FI in 1 .. Last_Index (Type_Table (T).Fields) loop declare F : constant Field_Enum := Type_Table (T).Fields (FI); begin if Is_Traversed_Field (T, F) then if F = Left_Opnd then Left_Opnd_Skipped := True; -- see comment below else Put (S, Image (Field_Table (F).Offset) & ", "); end if; end if; end; end loop; -- We always put the Left_Opnd field of N_Op_Concat last. See -- comments in Atree.Traverse_Func for the reason. We might as -- well do that for all Left_Opnd fields; the old version did -- that. if Left_Opnd_Skipped then Put (S, Image (Field_Table (Left_Opnd).Offset) & ", "); end if; Put (S, "others => No_Field_Offset"); Decrease_Indent (S, 2); Put (S, ")"); end if; end Put_Aggregate; function Init_Max_Traversed_Fields return Field_Offset is Result : Field_Offset := 0; begin for T in Concrete_Node loop declare Num_Traversed_Fields : Field_Offset := 0; -- in type T begin for FI in 1 .. Last_Index (Type_Table (T).Fields) loop declare F : constant Field_Enum := Type_Table (T).Fields (FI); begin if Is_Traversed_Field (T, F) then Num_Traversed_Fields := Num_Traversed_Fields + 1; end if; end; end loop; if Num_Traversed_Fields > Result then Result := Num_Traversed_Fields; end if; end; end loop; return Result; end Init_Max_Traversed_Fields; Max_Traversed_Fields : constant Field_Offset := Init_Max_Traversed_Fields; begin Put (S, "-- Table of fields that should be traversed by Traverse subprograms." & LF); Put (S, "-- Each entry is an array of offsets in slots of fields to be" & LF); Put (S, "-- traversed, terminated by a sentinel equal to No_Field_Offset." & LF & LF); Put (S, "subtype Traversed_Offset_Array is Offset_Array (0 .. " & Image (Max_Traversed_Fields - 1) & " + 1);" & LF); Put (S, "Traversed_Fields : constant array (Node_Kind) of Traversed_Offset_Array :=" & LF); -- One extra for the sentinel Increase_Indent (S, 2); Put (S, "("); Increase_Indent (S, 1); Iterate_Types (Node_Kind, Pre => Put_Aggregate'Access); Decrease_Indent (S, 1); Put (S, ");" & LF & LF); Decrease_Indent (S, 2); end Put_Traversed_Fields; ---------------- -- Put_Tables -- ---------------- procedure Put_Tables (S : in out Sink; Root : Root_Type) is First_Time : Boolean := True; procedure Put_Size (T : Node_Or_Entity_Type); procedure Put_Size (T : Node_Or_Entity_Type) is begin if T in Concrete_Type then if First_Time then First_Time := False; else Put (S, "," & LF); end if; Put (S, Image (T) & " => " & Image (Type_Size_In_Slots (T))); end if; end Put_Size; procedure Put_Field_Array (T : Concrete_Type); procedure Put_Field_Array (T : Concrete_Type) is First_Time : Boolean := True; begin for F in First_Field (Root) .. Last_Field (Root) loop if Fields_Per_Node (T) (F) then if First_Time then First_Time := False; else Put (S, "," & LF); end if; Put (S, F_Image (F)); end if; end loop; end Put_Field_Array; Field_Enum_Type_Name : constant String := (case Root is when Node_Kind => "Node_Field", when others => "Entity_Field"); -- Entity_Kind begin Put (S, "-- Table of sizes in " & SSS & "-bit slots for given " & Image (Root) & ", for use by Atree:" & LF); case Root is when Node_Kind => Put (S, LF & "Min_Node_Size : constant Field_Offset := " & Image (Min_Node_Size) & ";" & LF); Put (S, "Max_Node_Size : constant Field_Offset := " & Image (Max_Node_Size) & ";" & LF & LF); when Entity_Kind => Put (S, LF & "Min_Entity_Size : constant Field_Offset := " & Image (Min_Entity_Size) & ";" & LF); Put (S, "Max_Entity_Size : constant Field_Offset := " & Image (Max_Entity_Size) & ";" & LF & LF); when others => raise Program_Error; end case; Put (S, "Size : constant array (" & Image (Root) & ") of Field_Offset :=" & LF); Increase_Indent (S, 2); Put (S, "("); Increase_Indent (S, 1); Iterate_Types (Root, Pre => Put_Size'Access); Decrease_Indent (S, 1); Put (S, "); -- Size" & LF); Decrease_Indent (S, 2); if Root = Node_Kind then declare type Node_Dummy is array (Node_Field) of Boolean; type Entity_Dummy is array (Entity_Field) of Boolean; Num_Fields : constant Root_Int := Node_Dummy'Length + Entity_Dummy'Length; First_Time : Boolean := True; begin Put (S, LF & "-- Enumeration of all " & Image (Num_Fields) & " fields:" & LF & LF); Put (S, "type Node_Or_Entity_Field is" & LF); Increase_Indent (S, 2); Put (S, "("); Increase_Indent (S, 1); for F in Node_Field loop if First_Time then First_Time := False; else Put (S, "," & LF); end if; Put (S, F_Image (F)); end loop; for F in Entity_Field loop Put (S, "," & LF); Put (S, F_Image (F)); end loop; Decrease_Indent (S, 1); Put (S, "); -- Node_Or_Entity_Field" & LF); Decrease_Indent (S, 2); end; end if; Put (S, LF & "subtype " & Field_Enum_Type_Name & " is" & LF); Increase_Indent (S, 2); Put (S, "Node_Or_Entity_Field range " & F_Image (First_Field (Root)) & " .. " & F_Image (Last_Field (Root)) & ";" & LF); Decrease_Indent (S, 2); Put (S, LF & "type " & Field_Enum_Type_Name & "_Index is new Pos;" & LF); Put (S, "type " & Field_Enum_Type_Name & "_Array is array (" & Field_Enum_Type_Name & "_Index range <>) of " & Field_Enum_Type_Name & ";" & LF); Put (S, "type " & Field_Enum_Type_Name & "_Array_Ref is access constant " & Field_Enum_Type_Name & "_Array;" & LF); Put (S, "subtype A is " & Field_Enum_Type_Name & "_Array;" & LF); -- Short name to make allocators below more readable declare First_Time : Boolean := True; procedure Do_One_Type (T : Node_Or_Entity_Type); procedure Do_One_Type (T : Node_Or_Entity_Type) is begin if T in Concrete_Type then if First_Time then First_Time := False; else Put (S, "," & LF); end if; Put (S, Image (T) & " =>" & LF); Increase_Indent (S, 2); Put (S, "new A'("); Increase_Indent (S, 6); Increase_Indent (S, 1); Put_Field_Array (T); Decrease_Indent (S, 1); Put (S, ")"); Decrease_Indent (S, 6); Decrease_Indent (S, 2); end if; end Do_One_Type; begin Put (S, LF & "-- Table mapping " & Image (Root) & "s to the sequence of fields that exist in that " & Image (Root) & ":" & LF & LF); Put (S, Field_Enum_Type_Name & "_Table : constant array (" & Image (Root) & ") of " & Field_Enum_Type_Name & "_Array_Ref :=" & LF); Increase_Indent (S, 2); Put (S, "("); Increase_Indent (S, 1); Iterate_Types (Root, Pre => Do_One_Type'Access); Decrease_Indent (S, 1); Put (S, "); -- " & Field_Enum_Type_Name & "_Table" & LF); Decrease_Indent (S, 2); end; if Root = Node_Kind then declare First_Time : Boolean := True; FS, FB, LB : Bit_Offset; -- Field size in bits, first bit, and last bit for the previous -- time around the loop. Used to print a comment after ",". procedure One_Comp (F : Field_Enum); -------------- -- One_Comp -- -------------- procedure One_Comp (F : Field_Enum) is pragma Annotate (Codepeer, Modified, Field_Table); Offset : constant Field_Offset := Field_Table (F).Offset; begin if First_Time then First_Time := False; else Put (S, ","); -- Print comment showing field's bits, except for 1-bit -- fields. if FS /= 1 then Put (S, " -- *" & Image (FS) & " = bits " & Image (FB) & ".." & Image (LB)); end if; Put (S, LF); end if; Put (S, F_Image (F) & " => (" & Image (Field_Table (F).Field_Type) & "_Field, " & Image (Offset) & ", " & Image (Field_Table (F).Type_Only) & ")"); FS := Field_Size (F); FB := First_Bit (F, Offset); LB := Last_Bit (F, Offset); end One_Comp; begin Put (S, LF & "-- Table mapping fields to kind and offset:" & LF & LF); Put (S, "Field_Descriptors : constant array (" & "Node_Or_Entity_Field) of Field_Descriptor :=" & LF); Increase_Indent (S, 2); Put (S, "("); Increase_Indent (S, 1); for F in Node_Field loop One_Comp (F); end loop; for F in Entity_Field loop One_Comp (F); end loop; Decrease_Indent (S, 1); Put (S, "); -- Field_Descriptors" & LF); Decrease_Indent (S, 2); end; end if; end Put_Tables; ---------------- -- Put_Seinfo -- ---------------- procedure Put_Seinfo is S : Sink; begin Create_File (S, "seinfo.ads"); Put (S, "with Types; use Types;" & LF); Put (S, LF & "package Seinfo is" & LF & LF); Increase_Indent (S, 3); Put (S, "-- This package is automatically generated." & LF & LF); Put (S, "-- Common declarations visible in both Sinfo.Nodes and Einfo.Entities." & LF); Put (S, LF & "type Field_Kind is" & LF); Increase_Indent (S, 2); Put (S, "("); Increase_Indent (S, 1); declare First_Time : Boolean := True; begin for T in Special_Type loop if First_Time then First_Time := False; else Put (S, "," & LF); end if; Put (S, Image (T) & "_Field"); end loop; end; Decrease_Indent (S, 1); Decrease_Indent (S, 2); Put (S, ");" & LF); Put (S, LF & "Field_Size : constant array (Field_Kind) of Field_Size_In_Bits :=" & LF); Increase_Indent (S, 2); Put (S, "("); Increase_Indent (S, 1); declare First_Time : Boolean := True; begin for T in Special_Type loop if First_Time then First_Time := False; else Put (S, "," & LF); end if; Put (S, Image (T) & "_Field => " & Image (Field_Size (T))); end loop; end; Decrease_Indent (S, 1); Decrease_Indent (S, 2); Put (S, ");" & LF & LF); Put (S, "type Type_Only_Enum is" & LF); Increase_Indent (S, 2); Put (S, "("); declare First_Time : Boolean := True; begin for TO in Type_Only_Enum loop if First_Time then First_Time := False; else Put (S, ", "); end if; Put (S, Image (TO)); end loop; end; Decrease_Indent (S, 2); Put (S, ");" & LF & LF); Put (S, "type Field_Descriptor is record" & LF); Increase_Indent (S, 3); Put (S, "Kind : Field_Kind;" & LF); Put (S, "Offset : Field_Offset;" & LF); Put (S, "Type_Only : Type_Only_Enum;" & LF); Decrease_Indent (S, 3); Put (S, "end record;" & LF & LF); -- Print out the node header types. Note that the Offset field is of -- the base type, because we are using zero-origin addressing in -- Atree. Put (S, "N_Head : constant Field_Offset := " & N_Head & ";" & LF & LF); Put (S, "Atree_Statistics_Enabled : constant Boolean := " & Capitalize (Boolean'Image (Statistics_Enabled)) & ";" & LF); Decrease_Indent (S, 3); Put (S, LF & "end Seinfo;" & LF); end Put_Seinfo; --------------- -- Put_Nodes -- --------------- procedure Put_Nodes is S : Sink; B : Sink; begin Create_File (S, "sinfo-nodes.ads"); Create_File (B, "sinfo-nodes.adb"); Put (S, "with Seinfo; use Seinfo;" & LF); Put (S, "pragma Warnings (Off);" & LF); -- With's included in case they are needed; so we don't have to keep -- switching back and forth. Put (S, "with Output; use Output;" & LF); Put (S, "pragma Warnings (On);" & LF); Put (S, LF & "package Sinfo.Nodes is" & LF & LF); Increase_Indent (S, 3); Put (S, "-- This package is automatically generated." & LF & LF); Put_Type_Hierarchy (S, Node_Kind); Put_Type_And_Subtypes (S, Node_Kind); Put (S, "pragma Assert (Node_Kind'Pos (N_Unused_At_Start) = 0);" & LF & LF); Put (S, "pragma Assert (Node_Kind'Last = N_Unused_At_End);" & LF & LF); Put_Subp_Decls (S, Node_Kind); Put_Traversed_Fields (S); Put_Tables (S, Node_Kind); Decrease_Indent (S, 3); Put (S, LF & "end Sinfo.Nodes;" & LF); Put (B, "with Unchecked_Conversion;" & LF); Put (B, "with Atree; use Atree; use Atree.Atree_Private_Part;" & LF); Put (B, "with Nlists; use Nlists;" & LF); Put (B, "pragma Warnings (Off);" & LF); Put (B, "with Einfo.Utils; use Einfo.Utils;" & LF); Put (B, "with Sinfo.Utils; use Sinfo.Utils;" & LF); Put (B, "pragma Warnings (On);" & LF); Put (B, LF & "package body Sinfo.Nodes is" & LF & LF); Increase_Indent (B, 3); Put (B, "-- This package is automatically generated." & LF & LF); Put (B, "pragma Style_Checks (""M200"");" & LF); for T in Special_Type loop if Node_Field_Types_Used (T) then Put_Casts (B, T); end if; end loop; Put_Subp_Bodies (B, Node_Kind); Decrease_Indent (B, 3); Put (B, "end Sinfo.Nodes;" & LF); end Put_Nodes; ------------------ -- Put_Entities -- ------------------ procedure Put_Entities is S : Sink; B : Sink; begin Create_File (S, "einfo-entities.ads"); Create_File (B, "einfo-entities.adb"); Put (S, "with Sinfo.Nodes; use Sinfo.Nodes;" & LF); Put (S, LF & "package Einfo.Entities is" & LF & LF); Increase_Indent (S, 3); Put (S, "-- This package is automatically generated." & LF & LF); Put_Type_Hierarchy (S, Entity_Kind); Put_Type_And_Subtypes (S, Entity_Kind); Put_Subp_Decls (S, Entity_Kind); Put_Tables (S, Entity_Kind); Decrease_Indent (S, 3); Put (S, LF & "end Einfo.Entities;" & LF); Put (B, "with Unchecked_Conversion;" & LF); Put (B, "with Atree; use Atree; use Atree.Atree_Private_Part;" & LF); Put (B, "with Einfo.Utils; use Einfo.Utils;" & LF); -- This forms a cycle between packages (via bodies, which is OK) Put (B, LF & "package body Einfo.Entities is" & LF & LF); Increase_Indent (B, 3); Put (B, "-- This package is automatically generated." & LF & LF); Put (B, "pragma Style_Checks (""M200"");" & LF); for T in Special_Type loop if Entity_Field_Types_Used (T) then Put_Casts (B, T); end if; end loop; Put_Subp_Bodies (B, Entity_Kind); Decrease_Indent (B, 3); Put (B, "end Einfo.Entities;" & LF); end Put_Entities; ------------------- -- Put_Make_Spec -- ------------------- procedure Put_Make_Spec (S : in out Sink; Root : Root_Type; T : Concrete_Type) is begin Put (S, "function Make_" & Image_Sans_N (T) & "" & LF); Increase_Indent (S, 2); Put (S, "(Sloc : Source_Ptr"); Increase_Indent (S, 1); for F of Type_Table (T).Fields loop pragma Assert (Fields_Per_Node (T) (F)); if Syntactic (T) (F) then declare Typ : constant String := (if Field_Table (F).Field_Type = Flag then "Boolean" else Image (Field_Table (F).Field_Type)); -- All Flag fields have a default, which is False by -- default. Default : constant String := (if Field_Table (F).Default_Value = No_Default then (if Field_Table (F).Field_Type = Flag then " := False" else "") else " := " & Value_Image (Field_Table (F).Default_Value)); begin Put (S, ";" & LF); Put (S, Image (F)); Put (S, " : " & Typ & Default); end; end if; end loop; Put (S, ")" & LF); Put (S, "return " & Node_Or_Entity (Root) & "_Id"); Decrease_Indent (S, 2); Decrease_Indent (S, 1); end Put_Make_Spec; -------------------- -- Put_Make_Decls -- -------------------- procedure Put_Make_Decls (S : in out Sink; Root : Root_Type) is begin for T in First_Concrete (Root) .. Last_Concrete (Root) loop if T not in N_Unused_At_Start | N_Unused_At_End then Put_Make_Spec (S, Root, T); Put (S, ";" & LF); Put (S, "pragma " & Inline & " (Make_" & Image_Sans_N (T) & ");" & LF & LF); end if; end loop; end Put_Make_Decls; --------------------- -- Put_Make_Bodies -- --------------------- procedure Put_Make_Bodies (S : in out Sink; Root : Root_Type) is begin for T in First_Concrete (Root) .. Last_Concrete (Root) loop if T not in N_Unused_At_Start | N_Unused_At_End then Put_Make_Spec (S, Root, T); Put (S, LF & "is" & LF); Increase_Indent (S, 3); Put (S, "N : constant Node_Id :=" & LF); if T in Entity_Node then Put (S, " New_Entity (" & Image (T) & ", Sloc);" & LF); else Put (S, " New_Node (" & Image (T) & ", Sloc);" & LF); end if; Decrease_Indent (S, 3); Put (S, "begin" & LF); Increase_Indent (S, 3); for F of Type_Table (T).Fields loop pragma Assert (Fields_Per_Node (T) (F)); if Syntactic (T) (F) then declare NWidth : constant := 28; -- This constant comes from the old Xnmake, which wraps -- the Set_... call if the field name is that long or -- longer. F_Name : constant String := Image (F); begin if F_Name'Length < NWidth then Put (S, "Set_" & F_Name & " (N, " & F_Name & ");" & LF); -- Wrap the line else Put (S, "Set_" & F_Name & "" & LF); Increase_Indent (S, 2); Put (S, "(N, " & F_Name & ");" & LF); Decrease_Indent (S, 2); end if; end; end if; end loop; if Is_Descendant (N_Op, T) then -- Special cases for N_Op nodes: fill in the Chars and Entity -- fields even though they were not passed in. declare Op : constant String := Image_Sans_N (T); -- This will be something like "Op_And" or "Op_Add" Op_Name_With_Op : constant String := (if T = N_Op_Plus then "Op_Add" elsif T = N_Op_Minus then "Op_Subtract" else Op); -- Special cases for unary operators that have the same name -- as a binary operator; we use the binary operator name in -- that case. Slid : constant String (1 .. Op_Name_With_Op'Length) := Op_Name_With_Op; pragma Assert (Slid (1 .. 3) = "Op_"); Op_Name : constant String := (if T in N_Op_Rotate_Left | N_Op_Rotate_Right | N_Op_Shift_Left | N_Op_Shift_Right | N_Op_Shift_Right_Arithmetic then Slid (4 .. Slid'Last) else Slid); -- Special cases for shifts and rotates; the node kind has -- "Op_", but the Name_Id constant does not. begin Put (S, "Set_Chars (N, Name_" & Op_Name & ");" & LF); Put (S, "Set_Entity (N, Standard_" & Op & ");" & LF); end; end if; if Type_Table (T).Nmake_Assert.all /= "" then Put (S, "pragma Assert (" & Type_Table (T).Nmake_Assert.all & ");" & LF); end if; Put (S, "return N;" & LF); Decrease_Indent (S, 3); Put (S, "end Make_" & Image_Sans_N (T) & ";" & LF & LF); end if; end loop; end Put_Make_Bodies; --------------- -- Put_Nmake -- --------------- -- Documentation for the Nmake package, generated by Put_Nmake below. -- The Nmake package contains a set of routines used to construct tree -- nodes using a functional style. There is one routine for each node -- type defined in Gen_IL.Gen.Gen_Nodes with the general interface: -- function Make_xxx (Sloc : Source_Ptr, -- Field_Name_1 : Field_Name_1_Type [:= default] -- Field_Name_2 : Field_Name_2_Type [:= default] -- ...) -- return Node_Id -- Only syntactic fields are included. -- Default values are provided as specified in Gen_Nodes, except that if -- no default is specified for a flag field, it has a default of False. -- Warning: since calls to Make_xxx routines are normal function calls, the -- arguments can be evaluated in any order. This means that at most one such -- argument can have side effects (e.g. be a call to a parse routine). procedure Put_Nmake is S : Sink; B : Sink; begin Create_File (S, "nmake.ads"); Create_File (B, "nmake.adb"); Put (S, "with Namet; use Namet;" & LF); Put (S, "with Nlists; use Nlists;" & LF); Put (S, "with Types; use Types;" & LF); Put (S, "with Uintp; use Uintp;" & LF); Put (S, "with Urealp; use Urealp;" & LF); Put (S, LF & "package Nmake is" & LF & LF); Increase_Indent (S, 3); Put (S, "-- This package is automatically generated." & LF & LF); Put (S, "-- See Put_Nmake in gen_il-gen.adb for documentation." & LF & LF); Put_Make_Decls (S, Node_Kind); Decrease_Indent (S, 3); Put (S, "end Nmake;" & LF); Put (B, "with Atree; use Atree;" & LF); Put (B, "with Sinfo.Nodes; use Sinfo.Nodes;" & LF); Put (B, "with Sinfo.Utils; use Sinfo.Utils;" & LF); Put (B, "with Snames; use Snames;" & LF); Put (B, "with Stand; use Stand;" & LF); Put (B, LF & "package body Nmake is" & LF & LF); Increase_Indent (B, 3); Put (B, "-- This package is automatically generated." & LF & LF); Put (B, "pragma Style_Checks (""M200"");" & LF); Put_Make_Bodies (B, Node_Kind); Decrease_Indent (B, 3); Put (B, "end Nmake;" & LF); end Put_Nmake; ----------------------- -- Put_Seinfo_Tables -- ----------------------- procedure Put_Seinfo_Tables is S : Sink; B : Sink; Type_Layout : Concrete_Type_Layout_Array; function Get_Last_Bit (T : Concrete_Type; F : Opt_Field_Enum; First_Bit : Bit_Offset) return Bit_Offset; function First_Bit_Image (First_Bit : Bit_Offset) return String; function Last_Bit_Image (Last_Bit : Bit_Offset) return String; procedure Put_Field_List (Bit : Bit_Offset); -- Print out the list of fields that are allocated (in part, for -- fields bigger than one bit) at the given bit offset. This allows -- us to see which fields are overlaid with each other, which should -- only happen if the sets of types with those fields are disjoint. function Get_Last_Bit (T : Concrete_Type; F : Opt_Field_Enum; First_Bit : Bit_Offset) return Bit_Offset is begin return Result : Bit_Offset do if F = No_Field then -- We don't have a field size for No_Field, so just look at -- the bits up to the next slot boundary. Result := First_Bit; while (Result + 1) mod SS /= 0 and then Type_Layout (T) (Result + 1) = No_Field loop Result := Result + 1; end loop; else Result := First_Bit + Field_Size (F) - 1; end if; end return; end Get_Last_Bit; function First_Bit_Image (First_Bit : Bit_Offset) return String is W : constant Bit_Offset := First_Bit / SS; B : constant Bit_Offset := First_Bit mod SS; pragma Assert (W * SS + B = First_Bit); begin return Image (W) & "*" & SSS & (if B = 0 then "" else " + " & Image (B)); end First_Bit_Image; function Last_Bit_Image (Last_Bit : Bit_Offset) return String is W : constant Bit_Offset := (Last_Bit + 1) / SS; begin if W * SS - 1 = Last_Bit then return Image (W) & "*" & SSS & " - 1"; else return First_Bit_Image (Last_Bit); end if; end Last_Bit_Image; function Image_Or_Waste (F : Opt_Field_Enum) return String is (if F = No_Field then "Wasted_Bits" else Image (F)); Num_Wasted_Bits : Bit_Offset'Base := 0; Type_Layout_Size : Bit_Offset'Base := Type_Layout'Size; -- Total size of Type_Layout, including the Field_Arrays its -- components point to. procedure Put_Field_List (Bit : Bit_Offset) is First_Time : Boolean := True; begin for F in Field_Enum loop if F /= Between_Node_And_Entity_Fields and then Bit in First_Bit (F, Field_Table (F).Offset) .. Last_Bit (F, Field_Table (F).Offset) then if First_Time then First_Time := False; else Put (B, "," & LF); end if; Put (B, Image (F)); end if; end loop; end Put_Field_List; begin -- Put_Seinfo_Tables Create_File (S, "seinfo_tables.ads"); Create_File (B, "seinfo_tables.adb"); for T in Concrete_Type loop Type_Layout (T) := new Field_Array' (0 .. Type_Bit_Size_Aligned (T) - 1 => No_Field); Type_Layout_Size := Type_Layout_Size + Type_Layout (T).all'Size; for F in Field_Enum loop if Fields_Per_Node (T) (F) then declare Off : constant Field_Offset := Field_Table (F).Offset; subtype Bit_Range is Bit_Offset range First_Bit (F, Off) .. Last_Bit (F, Off); begin pragma Assert (Type_Layout (T) (Bit_Range) = (Bit_Range => No_Field)); Type_Layout (T) (Bit_Range) := (others => F); end; end if; end loop; end loop; for T in Concrete_Type loop for B in 0 .. Type_Bit_Size_Aligned (T) - 1 loop if Type_Layout (T) (B) = No_Field then Num_Wasted_Bits := Num_Wasted_Bits + 1; end if; end loop; end loop; Put (S, LF & "package Seinfo_Tables is" & LF & LF); Increase_Indent (S, 3); Put (S, "-- This package is automatically generated." & LF & LF); Put (S, "-- This package is not used by the compiler." & LF); Put (S, "-- The body contains tables that are intended to be used by humans to" & LF); Put (S, "-- help understand the layout of various data structures." & LF); Put (S, "-- Search for ""--"" to find major sections of code." & LF & LF); Put (S, "pragma Elaborate_Body;" & LF); Decrease_Indent (S, 3); Put (S, LF & "end Seinfo_Tables;" & LF); Put (B, "with Gen_IL.Types; use Gen_IL.Types;" & LF); Put (B, "with Gen_IL.Fields; use Gen_IL.Fields;" & LF); Put (B, "with Gen_IL.Internals; use Gen_IL.Internals;" & LF); Put (B, LF & "package body Seinfo_Tables is" & LF & LF); Increase_Indent (B, 3); Put (B, "-- This package is automatically generated." & LF & LF); Put (B, "Num_Wasted_Bits : Bit_Offset'Base := " & Image (Num_Wasted_Bits) & " with Unreferenced;" & LF); Put (B, LF & "Wasted_Bits : constant Opt_Field_Enum := No_Field;" & LF); Put (B, LF & "-- Table showing the layout of each Node_Or_Entity_Type. For each" & LF); Put (B, "-- concrete type, we show the bits used by each field. Each field" & LF); Put (B, "-- uses the same bit range in all types. This table is not used by" & LF); Put (B, "-- the compiler; it is for information only." & LF & LF); Put (B, "-- Wasted_Bits are unused bits between fields, and padding at the end" & LF); Put (B, "-- to round up to a multiple of the slot size." & LF); Put (B, LF & "-- Type_Layout is " & Image (Type_Layout_Size / 8) & " bytes." & LF); Put (B, LF & "pragma Style_Checks (Off);" & LF); Put (B, "Type_Layout : constant Concrete_Type_Layout_Array := " & LF); Increase_Indent (B, 2); Put (B, "-- Concrete node types:" & LF); Put (B, "("); Increase_Indent (B, 1); declare First_Time : Boolean := True; begin for T in Concrete_Type loop if First_Time then First_Time := False; else Put (B, "," & LF & LF); end if; if T = Concrete_Entity'First then Put (B, "-- Concrete entity types:" & LF & LF); end if; Put (B, Image (T) & " => new Field_Array'" & LF); Increase_Indent (B, 2); Put (B, "("); Increase_Indent (B, 1); declare First_Time : Boolean := True; First_Bit : Bit_Offset := 0; F : Opt_Field_Enum; function Node_Field_Of_Entity return String is (if T in Entity_Type and then F in Node_Field then " -- N" else ""); -- A comment to put out for fields of entities that are -- shared with nodes, such as Chars. begin while First_Bit < Type_Bit_Size_Aligned (T) loop if First_Time then First_Time := False; else Put (B, "," & Node_Field_Of_Entity & LF); end if; F := Type_Layout (T) (First_Bit); declare Last_Bit : constant Bit_Offset := Get_Last_Bit (T, F, First_Bit); begin pragma Assert (Type_Layout (T) (First_Bit .. Last_Bit) = (First_Bit .. Last_Bit => F)); if Last_Bit = First_Bit then Put (B, First_Bit_Image (First_Bit) & " => " & Image_Or_Waste (F)); else pragma Assert (if F /= No_Field then First_Bit mod Field_Size (F) = 0); Put (B, First_Bit_Image (First_Bit) & " .. " & Last_Bit_Image (Last_Bit) & " => " & Image_Or_Waste (F)); end if; First_Bit := Last_Bit + 1; end; end loop; end; Decrease_Indent (B, 1); Put (B, ")"); Decrease_Indent (B, 2); end loop; end; Decrease_Indent (B, 1); Put (B, ") -- Type_Layout" & LF); Increase_Indent (B, 6); Put (B, "with Export, Convention => Ada;" & LF); Decrease_Indent (B, 6); Decrease_Indent (B, 2); Put (B, LF & "-- Table mapping bit offsets to the set of fields at that offset" & LF & LF); Put (B, "Bit_Used : constant Offset_To_Fields_Mapping :=" & LF); Increase_Indent (B, 2); Put (B, "("); Increase_Indent (B, 1); declare First_Time : Boolean := True; begin for Bit in 0 .. Bit_Offset'Max (Max_Node_Bit_Size, Max_Entity_Bit_Size) loop if First_Time then First_Time := False; else Put (B, "," & LF & LF); end if; Put (B, First_Bit_Image (Bit) & " => new Field_Array'" & LF); -- Use [...] notation here, to get around annoying Ada -- limitations on empty and singleton aggregates. This code is -- not used in the compiler, so there are no bootstrap issues. Increase_Indent (B, 2); Put (B, "["); Increase_Indent (B, 1); Put_Field_List (Bit); Decrease_Indent (B, 1); Put (B, "]"); Decrease_Indent (B, 2); end loop; end; Decrease_Indent (B, 1); Put (B, "); -- Bit_Used" & LF); Decrease_Indent (B, 2); Decrease_Indent (B, 3); Put (B, LF & "end Seinfo_Tables;" & LF); end Put_Seinfo_Tables; ----------------------------- -- Put_C_Type_And_Subtypes -- ----------------------------- procedure Put_C_Type_And_Subtypes (S : in out Sink; Root : Root_Type) is Cur_Pos : Root_Nat := 0; -- Current Node_Kind'Pos or Entity_Kind'Pos to be printed procedure Put_Enum_Lit (T : Node_Or_Entity_Type); -- Print out the #define corresponding to the Ada enumeration literal -- for T in Node_Kind and Entity_Kind (i.e. concrete types). -- This looks like "#define Some_Kind ", where Some_Kind -- is the Node_Kind or Entity_Kind enumeration literal, and -- is Node_Kind'Pos or Entity_Kind'Pos of that literal. procedure Put_Kind_Subtype (T : Node_Or_Entity_Type); -- Print out the SUBTYPE macro call corresponding to an abstract -- type. procedure Put_Enum_Lit (T : Node_Or_Entity_Type) is begin if T in Concrete_Type then Put (S, "#define " & Image (T) & " " & Image (Cur_Pos) & LF); Cur_Pos := Cur_Pos + 1; end if; end Put_Enum_Lit; procedure Put_Kind_Subtype (T : Node_Or_Entity_Type) is begin if T in Abstract_Type and then Type_Table (T).Parent /= No_Type then Put (S, "SUBTYPE (" & Image (T) & ", " & Image (Type_Table (T).Parent) & "," & LF); Increase_Indent (S, 3); Put (S, Image (Type_Table (T).First) & "," & LF); Put (S, Image (Type_Table (T).Last) & ")" & LF); Decrease_Indent (S, 3); end if; end Put_Kind_Subtype; begin Put_Union_Membership (S, Root, Only_Prototypes => True); Iterate_Types (Root, Pre => Put_Enum_Lit'Access); Put (S, "#define Number_" & Node_Or_Entity (Root) & "_Kinds " & Image (Cur_Pos) & "" & LF & LF); Iterate_Types (Root, Pre => Put_Kind_Subtype'Access); Put_Union_Membership (S, Root, Only_Prototypes => False); end Put_C_Type_And_Subtypes; ------------------ -- Put_C_Getter -- ------------------ procedure Put_C_Getter (S : in out Sink; F : Field_Enum) is Rec : Field_Info renames Field_Table (F).all; Off : constant Field_Offset := Rec.Offset; F_Size : constant Bit_Offset := Field_Size (Rec.Field_Type); F_Per_Slot : constant Field_Offset := SS / Field_Offset (Field_Size (Rec.Field_Type)); Slot_Off : constant Field_Offset := Off / F_Per_Slot; In_NH : constant Boolean := Slot_Off < Num_Header_Slots; N : constant String := Node_To_Fetch_From (F); begin Put (S, "INLINE " & Get_Set_Id_Image (Rec.Field_Type) & " " & Image (F) & " (Node_Id N)" & LF); Put (S, "{" & LF); Increase_Indent (S, 3); Put (S, "const Field_Offset Off = " & Image (Rec.Offset) & ";" & LF); Put (S, "const Field_Offset F_Size = " & Image (F_Size) & ";" & LF); if Field_Size (Rec.Field_Type) /= SS then Put (S, "const any_slot Mask = (1 << F_Size) - 1;" & LF); end if; Put (S, "const Field_Offset F_Per_Slot = Slot_Size / F_Size;" & LF); Put (S, "const Field_Offset Slot_Off = Off / F_Per_Slot;" & LF); Put (S, LF); if In_NH then Put (S, "any_slot slot = Node_Offsets_Ptr[" & N & "].Slots[Slot_Off];" & LF); else Put (S, "any_slot slot = *(Slots_Ptr + Node_Offsets_Ptr[" & N & "].Offset + Slot_Off);" & LF); end if; if Field_Size (Rec.Field_Type) /= SS then Put (S, "unsigned int Raw = (slot >> (Off % F_Per_Slot) * F_Size) & Mask;" & LF); else Put (S, "unsigned int Raw = slot;" & LF); end if; Put (S, Get_Set_Id_Image (Rec.Field_Type) & " val = "); if Field_Has_Special_Default (Rec.Field_Type) then Increase_Indent (S, 2); Put (S, "(Raw? Raw : " & Special_Default (Rec.Field_Type) & ")"); Decrease_Indent (S, 2); else Put (S, "Raw"); end if; Put (S, ";" & LF); Put (S, "return val;" & LF); Decrease_Indent (S, 3); Put (S, "}" & LF & LF); end Put_C_Getter; ------------------- -- Put_C_Getters -- ------------------- procedure Put_C_Getters (S : in out Sink; Root : Root_Type) is begin Put (S, "// Getters for fields" & LF & LF); for F in First_Field (Root) .. Last_Field (Root) loop Put_C_Getter (S, F); end loop; end Put_C_Getters; -------------------------- -- Put_Union_Membership -- -------------------------- procedure Put_Union_Membership (S : in out Sink; Root : Root_Type; Only_Prototypes : Boolean) is procedure Put_Ors (T : Abstract_Type); -- Print the "or" (i.e. "||") of tests whether kind is in each child -- type. procedure Put_Ors (T : Abstract_Type) is First_Time : Boolean := True; begin for Child of Type_Table (T).Children loop if First_Time then First_Time := False; else Put (S, " ||" & LF); end if; -- Unions, other abstract types, and concrete types each have -- their own way of testing membership in the C++ code. if Child in Abstract_Type then if Type_Table (Child).Is_Union then Put (S, "Is_In_" & Image (Child) & " (kind)"); else Put (S, "IN (kind, " & Image (Child) & ")"); end if; else Put (S, "kind == " & Image (Child)); end if; end loop; end Put_Ors; begin if not Only_Prototypes then Put (S, LF & "// Membership tests for union types" & LF & LF); end if; for T in First_Abstract (Root) .. Last_Abstract (Root) loop if Type_Table (T) /= null and then Type_Table (T).Is_Union then Put (S, "INLINE Boolean" & LF); Put (S, "Is_In_" & Image (T) & " (" & Node_Or_Entity (Root) & "_Kind kind)" & (if Only_Prototypes then ";" else "") & LF); if not Only_Prototypes then Put (S, "{" & LF); Increase_Indent (S, 3); Put (S, "return" & LF); Increase_Indent (S, 3); Put_Ors (T); Decrease_Indent (S, 3); Decrease_Indent (S, 3); Put (S, ";" & LF & "}" & LF); end if; Put (S, "" & LF); end if; end loop; end Put_Union_Membership; --------------------- -- Put_Sinfo_Dot_H -- --------------------- procedure Put_Sinfo_Dot_H is S : Sink; begin Create_File (S, "sinfo.h"); Put (S, "#ifdef __cplusplus" & LF); Put (S, "extern ""C"" {" & LF); Put (S, "#endif" & LF & LF); Put (S, "typedef Boolean Flag;" & LF & LF); Put (S, "#define N_Head " & N_Head & LF); Put (S, "" & LF); Put (S, "typedef struct Node_Header {" & LF); Increase_Indent (S, 2); Put (S, "any_slot Slots[N_Head];" & LF); Put (S, "Field_Offset Offset;" & LF); Decrease_Indent (S, 2); Put (S, "} Node_Header;" & LF & LF); Put (S, "extern Node_Header *Node_Offsets_Ptr;" & LF); Put (S, "extern any_slot *Slots_Ptr;" & LF & LF); Put_C_Type_And_Subtypes (S, Node_Kind); Put (S, "// Getters corresponding to instantiations of Atree.Get_n_Bit_Field" & LF & LF); Put_C_Getters (S, Node_Kind); Put (S, "#ifdef __cplusplus" & LF); Put (S, "}" & LF); Put (S, "#endif" & LF); end Put_Sinfo_Dot_H; --------------------- -- Put_Einfo_Dot_H -- --------------------- procedure Put_Einfo_Dot_H is S : Sink; procedure Put_Membership_Query_Spec (T : Node_Or_Entity_Type); procedure Put_Membership_Query_Defn (T : Node_Or_Entity_Type); -- Print out the Is_... function for T that calls the IN macro on the -- SUBTYPE. procedure Put_Membership_Query_Spec (T : Node_Or_Entity_Type) is Im : constant String := Image (T); pragma Assert (Im (Im'Last - 4 .. Im'Last) = "_Kind"); Im2 : constant String := Im (Im'First .. Im'Last - 5); Typ : constant String := (if Is_Descendant (Type_Kind, T) and then T /= Type_Kind then "_Type" else ""); begin pragma Assert (not Type_Table (T).Is_Union); Put (S, "INLINE B Is_" & Im2 & Typ & " (E Id)"); end Put_Membership_Query_Spec; procedure Put_Membership_Query_Defn (T : Node_Or_Entity_Type) is begin if T in Abstract_Type and T not in Root_Type then Put_Membership_Query_Spec (T); Put (S, "" & LF); Increase_Indent (S, 3); Put (S, "{ return IN (Ekind (Id), " & Image (T) & "); }" & LF); Decrease_Indent (S, 3); end if; end Put_Membership_Query_Defn; begin Create_File (S, "einfo.h"); Put (S, "#ifdef __cplusplus" & LF); Put (S, "extern ""C"" {" & LF); Put (S, "#endif" & LF & LF); Put (S, "typedef Boolean Flag;" & LF & LF); Put_C_Type_And_Subtypes (S, Entity_Kind); Put_C_Getters (S, Entity_Kind); Put (S, "// Abstract type queries" & LF & LF); Iterate_Types (Entity_Kind, Pre => Put_Membership_Query_Defn'Access); Put (S, LF & "#ifdef __cplusplus" & LF); Put (S, "}" & LF); Put (S, "#endif" & LF); end Put_Einfo_Dot_H; begin -- Compile Check_Completeness; Compute_Ranges (Node_Kind); Compute_Ranges (Entity_Kind); Compute_Fields_Per_Node; Compute_Field_Offsets; Compute_Type_Sizes; Check_For_Syntactic_Field_Mismatch; Verify_Type_Table; Node_Field_Types_Used := Field_Types_Used (Node_Field'First, Node_Field'Last); Entity_Field_Types_Used := Field_Types_Used (Entity_Field'First, Entity_Field'Last); Put_Seinfo; Put_Nodes; Put_Entities; Put_Nmake; Put_Seinfo_Tables; Put_Sinfo_Dot_H; Put_Einfo_Dot_H; end Compile; -------- -- Sy -- -------- function Sy (Field : Node_Field; Field_Type : Type_Enum; Default_Value : Field_Default_Value := No_Default; Pre, Pre_Get, Pre_Set : String := "") return Field_Sequence is begin return (1 => Create_Syntactic_Field (Field, Field_Type, Default_Value, Pre, Pre_Get, Pre_Set)); end Sy; -------- -- Sm -- -------- function Sm (Field : Field_Enum; Field_Type : Type_Enum; Type_Only : Type_Only_Enum := No_Type_Only; Pre, Pre_Get, Pre_Set : String := "") return Field_Sequence is begin return (1 => Create_Semantic_Field (Field, Field_Type, Type_Only, Pre, Pre_Get, Pre_Set)); end Sm; end Gen_IL.Gen;