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+-- LLVM back-end for ortho.
+-- Copyright (C) 2014 Tristan Gingold
+--
+-- GHDL is free software; you can redistribute it and/or modify it under
+-- the terms of the GNU General Public License as published by the Free
+-- Software Foundation; either version 2, or (at your option) any later
+-- version.
+--
+-- GHDL is distributed in the hope that it will be useful, but WITHOUT 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
+-- along with GCC; see the file COPYING. If not, write to the Free
+-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+-- 02111-1307, USA.
+
+with Interfaces; use Interfaces;
+with Interfaces.C; use Interfaces.C;
+with Ortho_Ident;
+use Ortho_Ident;
+with LLVM.Core;
+
+-- Interface to create nodes.
+package Ortho_LLVM is
+ --- PUBLIC DECLARATIONS
+ type O_Enode is private;
+ O_Enode_Null : constant O_Enode;
+ type O_Cnode is private;
+ O_Cnode_Null : constant O_Cnode;
+ type O_Lnode is private;
+ O_Lnode_Null : constant O_Lnode;
+ -- A node for a type.
+ type O_Tnode is private;
+ O_Tnode_Null : constant O_Tnode;
+ -- A node for a statement.
+ type O_Snode is private;
+ O_Snode_Null : constant O_Snode;
+ -- A node for a function.
+ type O_Dnode is private;
+ O_Dnode_Null : constant O_Dnode;
+ -- A node for a record element.
+ type O_Fnode is private;
+ O_Fnode_Null : constant O_Fnode;
+
+ procedure Finish_Debug;
+
+ ------------------------
+ -- Type definitions --
+ ------------------------
+
+ type O_Element_List is limited private;
+
+ -- Build a record type.
+ procedure Start_Record_Type (Elements : out O_Element_List);
+ -- Add a field in the record; not constrained array are prohibited, since
+ -- its size is unlimited.
+ procedure New_Record_Field
+ (Elements : in out O_Element_List;
+ El : out O_Fnode;
+ Ident : O_Ident; Etype : O_Tnode);
+ -- Finish the record type.
+ procedure Finish_Record_Type
+ (Elements : in out O_Element_List; Res : out O_Tnode);
+
+ -- Build an uncomplete record type:
+ -- First call NEW_UNCOMPLETE_RECORD_TYPE, which returns a record type.
+ -- This type can be declared or used to define access types on it.
+ -- Then, complete (if necessary) the record type, by calling
+ -- START_UNCOMPLETE_RECORD_TYPE, NEW_RECORD_FIELD and FINISH_RECORD_TYPE.
+ procedure New_Uncomplete_Record_Type (Res : out O_Tnode);
+ procedure Start_Uncomplete_Record_Type (Res : O_Tnode;
+ Elements : out O_Element_List);
+
+ -- Build an union type.
+ procedure Start_Union_Type (Elements : out O_Element_List);
+ procedure New_Union_Field
+ (Elements : in out O_Element_List;
+ El : out O_Fnode;
+ Ident : O_Ident;
+ Etype : O_Tnode);
+ procedure Finish_Union_Type
+ (Elements : in out O_Element_List; Res : out O_Tnode);
+
+ -- Build an access type.
+ -- DTYPE may be O_tnode_null in order to build an incomplete access type.
+ -- It is completed with finish_access_type.
+ function New_Access_Type (Dtype : O_Tnode) return O_Tnode;
+ procedure Finish_Access_Type (Atype : O_Tnode; Dtype : O_Tnode);
+
+ -- Build an array type.
+ -- The array is not constrained and unidimensional.
+ function New_Array_Type (El_Type : O_Tnode; Index_Type : O_Tnode)
+ return O_Tnode;
+
+ -- Build a constrained array type.
+ function New_Constrained_Array_Type (Atype : O_Tnode; Length : O_Cnode)
+ return O_Tnode;
+
+ -- Build a scalar type; size may be 8, 16, 32 or 64.
+ function New_Unsigned_Type (Size : Natural) return O_Tnode;
+ function New_Signed_Type (Size : Natural) return O_Tnode;
+
+ -- Build a float type.
+ function New_Float_Type return O_Tnode;
+
+ -- Build a boolean type.
+ procedure New_Boolean_Type (Res : out O_Tnode;
+ False_Id : O_Ident;
+ False_E : out O_Cnode;
+ True_Id : O_Ident;
+ True_E : out O_Cnode);
+
+ -- Create an enumeration
+ type O_Enum_List is limited private;
+
+ -- Elements are declared in order, the first is ordered from 0.
+ procedure Start_Enum_Type (List : out O_Enum_List; Size : Natural);
+ procedure New_Enum_Literal (List : in out O_Enum_List;
+ Ident : O_Ident; Res : out O_Cnode);
+ procedure Finish_Enum_Type (List : in out O_Enum_List; Res : out O_Tnode);
+
+ ----------------
+ -- Literals --
+ ----------------
+
+ -- Create a literal from an integer.
+ function New_Signed_Literal (Ltype : O_Tnode; Value : Integer_64)
+ return O_Cnode;
+ function New_Unsigned_Literal (Ltype : O_Tnode; Value : Unsigned_64)
+ return O_Cnode;
+
+ function New_Float_Literal (Ltype : O_Tnode; Value : IEEE_Float_64)
+ return O_Cnode;
+
+ -- Create a null access literal.
+ function New_Null_Access (Ltype : O_Tnode) return O_Cnode;
+
+ -- Build a record/array aggregate.
+ -- The aggregate is constant, and therefore can be only used to initialize
+ -- constant declaration.
+ -- ATYPE must be either a record type or an array subtype.
+ -- Elements must be added in the order, and must be literals or aggregates.
+ type O_Record_Aggr_List is limited private;
+ type O_Array_Aggr_List is limited private;
+
+ procedure Start_Record_Aggr (List : out O_Record_Aggr_List;
+ Atype : O_Tnode);
+ procedure New_Record_Aggr_El (List : in out O_Record_Aggr_List;
+ Value : O_Cnode);
+ procedure Finish_Record_Aggr (List : in out O_Record_Aggr_List;
+ Res : out O_Cnode);
+
+ procedure Start_Array_Aggr (List : out O_Array_Aggr_List; Atype : O_Tnode);
+ procedure New_Array_Aggr_El (List : in out O_Array_Aggr_List;
+ Value : O_Cnode);
+ procedure Finish_Array_Aggr (List : in out O_Array_Aggr_List;
+ Res : out O_Cnode);
+
+ -- Build an union aggregate.
+ function New_Union_Aggr (Atype : O_Tnode; Field : O_Fnode; Value : O_Cnode)
+ return O_Cnode;
+
+ -- Returns the size in bytes of ATYPE. The result is a literal of
+ -- unsigned type RTYPE
+ -- ATYPE cannot be an unconstrained array type.
+ function New_Sizeof (Atype : O_Tnode; Rtype : O_Tnode) return O_Cnode;
+
+ -- Returns the alignment in bytes for ATYPE. The result is a literal of
+ -- unsgined type RTYPE.
+ function New_Alignof (Atype : O_Tnode; Rtype : O_Tnode) return O_Cnode;
+
+ -- Returns the offset of FIELD in record ATYPE. The result is a literal
+ -- of unsigned type RTYPE.
+ function New_Offsetof (Atype : O_Tnode; Field : O_Fnode; Rtype : O_Tnode)
+ return O_Cnode;
+
+ -- Get the address of a subprogram.
+ function New_Subprogram_Address (Subprg : O_Dnode; Atype : O_Tnode)
+ return O_Cnode;
+
+ -- Get the address of LVALUE.
+ -- ATYPE must be a type access whose designated type is the type of LVALUE.
+ -- FIXME: what about arrays.
+ function New_Global_Address (Decl : O_Dnode; Atype : O_Tnode)
+ return O_Cnode;
+
+ -- Same as New_Address but without any restriction.
+ function New_Global_Unchecked_Address (Decl : O_Dnode; Atype : O_Tnode)
+ return O_Cnode;
+
+ -------------------
+ -- Expressions --
+ -------------------
+
+ type ON_Op_Kind is
+ (
+ -- Not an operation; invalid.
+ ON_Nil,
+
+ -- Dyadic operations.
+ ON_Add_Ov, -- ON_Dyadic_Op_Kind
+ ON_Sub_Ov, -- ON_Dyadic_Op_Kind
+ ON_Mul_Ov, -- ON_Dyadic_Op_Kind
+ ON_Div_Ov, -- ON_Dyadic_Op_Kind
+ ON_Rem_Ov, -- ON_Dyadic_Op_Kind
+ ON_Mod_Ov, -- ON_Dyadic_Op_Kind
+
+ -- Binary operations.
+ ON_And, -- ON_Dyadic_Op_Kind
+ ON_Or, -- ON_Dyadic_Op_Kind
+ ON_Xor, -- ON_Dyadic_Op_Kind
+ ON_And_Then, -- ON_Dyadic_Op_Kind
+ ON_Or_Else, -- ON_Dyadic_Op_Kind
+
+ -- Monadic operations.
+ ON_Not, -- ON_Monadic_Op_Kind
+ ON_Neg_Ov, -- ON_Monadic_Op_Kind
+ ON_Abs_Ov, -- ON_Monadic_Op_Kind
+
+ -- Comparaisons
+ ON_Eq, -- ON_Compare_Op_Kind
+ ON_Neq, -- ON_Compare_Op_Kind
+ ON_Le, -- ON_Compare_Op_Kind
+ ON_Lt, -- ON_Compare_Op_Kind
+ ON_Ge, -- ON_Compare_Op_Kind
+ ON_Gt -- ON_Compare_Op_Kind
+ );
+
+ subtype ON_Dyadic_Op_Kind is ON_Op_Kind range ON_Add_Ov .. ON_Or_Else;
+ subtype ON_Monadic_Op_Kind is ON_Op_Kind range ON_Not .. ON_Abs_Ov;
+ subtype ON_Compare_Op_Kind is ON_Op_Kind range ON_Eq .. ON_Gt;
+
+ type O_Storage is (O_Storage_External,
+ O_Storage_Public,
+ O_Storage_Private,
+ O_Storage_Local);
+ -- Specifies the storage kind of a declaration.
+ -- O_STORAGE_EXTERNAL:
+ -- The declaration do not either reserve memory nor generate code, and
+ -- is imported either from an other file or from a later place in the
+ -- current file.
+ -- O_STORAGE_PUBLIC, O_STORAGE_PRIVATE:
+ -- The declaration reserves memory or generates code.
+ -- With O_STORAGE_PUBLIC, the declaration is exported outside of the
+ -- file while with O_STORAGE_PRIVATE, the declaration is local to the
+ -- file.
+
+ Type_Error : exception;
+ Syntax_Error : exception;
+
+ -- Create a value from a literal.
+ function New_Lit (Lit : O_Cnode) return O_Enode;
+
+ -- Create a dyadic operation.
+ -- Left and right nodes must have the same type.
+ -- Binary operation is allowed only on boolean types.
+ -- The result is of the type of the operands.
+ function New_Dyadic_Op (Kind : ON_Dyadic_Op_Kind; Left, Right : O_Enode)
+ return O_Enode;
+
+ -- Create a monadic operation.
+ -- Result is of the type of operand.
+ function New_Monadic_Op (Kind : ON_Monadic_Op_Kind; Operand : O_Enode)
+ return O_Enode;
+
+ -- Create a comparaison operator.
+ -- NTYPE is the type of the result and must be a boolean type.
+ function New_Compare_Op
+ (Kind : ON_Compare_Op_Kind; Left, Right : O_Enode; Ntype : O_Tnode)
+ return O_Enode;
+
+
+ type O_Inter_List is limited private;
+ type O_Assoc_List is limited private;
+ type O_If_Block is limited private;
+ type O_Case_Block is limited private;
+
+
+ -- Get an element of an array.
+ -- INDEX must be of the type of the array index.
+ function New_Indexed_Element (Arr : O_Lnode; Index : O_Enode)
+ return O_Lnode;
+
+ -- Get a slice of an array; this is equivalent to a conversion between
+ -- an array or an array subtype and an array subtype.
+ -- RES_TYPE must be an array_sub_type whose base type is the same as the
+ -- base type of ARR.
+ -- INDEX must be of the type of the array index.
+ function New_Slice (Arr : O_Lnode; Res_Type : O_Tnode; Index : O_Enode)
+ return O_Lnode;
+
+ -- Get an element of a record.
+ -- Type of REC must be a record type.
+ function New_Selected_Element (Rec : O_Lnode; El : O_Fnode)
+ return O_Lnode;
+
+ -- Reference an access.
+ -- Type of ACC must be an access type.
+ function New_Access_Element (Acc : O_Enode) return O_Lnode;
+
+ -- Do a conversion.
+ -- Allowed conversions are:
+ -- FIXME: to write.
+ function New_Convert_Ov (Val : O_Enode; Rtype : O_Tnode) return O_Enode;
+
+ -- Get the address of LVALUE.
+ -- ATYPE must be a type access whose designated type is the type of LVALUE.
+ -- FIXME: what about arrays.
+ function New_Address (Lvalue : O_Lnode; Atype : O_Tnode) return O_Enode;
+
+ -- Same as New_Address but without any restriction.
+ function New_Unchecked_Address (Lvalue : O_Lnode; Atype : O_Tnode)
+ return O_Enode;
+
+ -- Get the value of an Lvalue.
+ function New_Value (Lvalue : O_Lnode) return O_Enode;
+ function New_Obj_Value (Obj : O_Dnode) return O_Enode;
+
+ -- Get an lvalue from a declaration.
+ function New_Obj (Obj : O_Dnode) return O_Lnode;
+
+ -- Return a pointer of type RTPE to SIZE bytes allocated on the stack.
+ function New_Alloca (Rtype : O_Tnode; Size : O_Enode) return O_Enode;
+
+ -- Declare a type.
+ -- This simply gives a name to a type.
+ procedure New_Type_Decl (Ident : O_Ident; Atype : O_Tnode);
+
+ ---------------------
+ -- Declarations. --
+ ---------------------
+
+ -- Filename of the next declaration.
+ procedure New_Debug_Filename_Decl (Filename : String);
+
+ -- Line number of the next declaration.
+ procedure New_Debug_Line_Decl (Line : Natural);
+
+ -- Add a comment in the declarative region.
+ procedure New_Debug_Comment_Decl (Comment : String);
+
+ -- Declare a constant.
+ -- This simply gives a name to a constant value or aggregate.
+ -- A constant cannot be modified and its storage cannot be local.
+ -- ATYPE must be constrained.
+ procedure New_Const_Decl
+ (Res : out O_Dnode;
+ Ident : O_Ident;
+ Storage : O_Storage;
+ Atype : O_Tnode);
+
+ -- Set the value of a non-external constant.
+ procedure Start_Const_Value (Const : in out O_Dnode);
+ procedure Finish_Const_Value (Const : in out O_Dnode; Val : O_Cnode);
+
+ -- Create a variable declaration.
+ -- A variable can be local only inside a function.
+ -- ATYPE must be constrained.
+ procedure New_Var_Decl
+ (Res : out O_Dnode;
+ Ident : O_Ident;
+ Storage : O_Storage;
+ Atype : O_Tnode);
+
+ -- Start a subprogram declaration.
+ -- Note: nested subprograms are allowed, ie o_storage_local subprograms can
+ -- be declared inside a subprograms. It is not allowed to declare
+ -- o_storage_external subprograms inside a subprograms.
+ -- Return type and interfaces cannot be a composite type.
+ procedure Start_Function_Decl
+ (Interfaces : out O_Inter_List;
+ Ident : O_Ident;
+ Storage : O_Storage;
+ Rtype : O_Tnode);
+ -- For a subprogram without return value.
+ procedure Start_Procedure_Decl
+ (Interfaces : out O_Inter_List;
+ Ident : O_Ident;
+ Storage : O_Storage);
+
+ -- Add an interface declaration to INTERFACES.
+ procedure New_Interface_Decl
+ (Interfaces : in out O_Inter_List;
+ Res : out O_Dnode;
+ Ident : O_Ident;
+ Atype : O_Tnode);
+ -- Finish the function declaration, get the node and a statement list.
+ procedure Finish_Subprogram_Decl
+ (Interfaces : in out O_Inter_List; Res : out O_Dnode);
+ -- Start a subprogram body.
+ -- Note: the declaration may have an external storage, in this case it
+ -- becomes public.
+ procedure Start_Subprogram_Body (Func : O_Dnode);
+ -- Finish a subprogram body.
+ procedure Finish_Subprogram_Body;
+
+
+ -------------------
+ -- Statements. --
+ -------------------
+
+ -- Add a line number as a statement.
+ procedure New_Debug_Line_Stmt (Line : Natural);
+
+ -- Add a comment as a statement.
+ procedure New_Debug_Comment_Stmt (Comment : String);
+
+ -- Start a declarative region.
+ procedure Start_Declare_Stmt;
+ procedure Finish_Declare_Stmt;
+
+ -- Create a function call or a procedure call.
+ procedure Start_Association (Assocs : out O_Assoc_List; Subprg : O_Dnode);
+ procedure New_Association (Assocs : in out O_Assoc_List; Val : O_Enode);
+ function New_Function_Call (Assocs : O_Assoc_List) return O_Enode;
+ procedure New_Procedure_Call (Assocs : in out O_Assoc_List);
+
+ -- Assign VALUE to TARGET, type must be the same or compatible.
+ -- FIXME: what about slice assignment?
+ procedure New_Assign_Stmt (Target : O_Lnode; Value : O_Enode);
+
+ -- Exit from the subprogram and return VALUE.
+ procedure New_Return_Stmt (Value : O_Enode);
+ -- Exit from the subprogram, which doesn't return value.
+ procedure New_Return_Stmt;
+
+ -- Build an IF statement.
+ procedure Start_If_Stmt (Block : in out O_If_Block; Cond : O_Enode);
+ procedure New_Else_Stmt (Block : in out O_If_Block);
+ procedure Finish_If_Stmt (Block : in out O_If_Block);
+
+ -- Create a infinite loop statement.
+ procedure Start_Loop_Stmt (Label : out O_Snode);
+ procedure Finish_Loop_Stmt (Label : in out O_Snode);
+
+ -- Exit from a loop stmt or from a for stmt.
+ procedure New_Exit_Stmt (L : O_Snode);
+ -- Go to the start of a loop stmt or of a for stmt.
+ -- Loops/Fors between L and the current points are exited.
+ procedure New_Next_Stmt (L : O_Snode);
+
+ -- Case statement.
+ -- VALUE is the selector and must be a discrete type.
+ procedure Start_Case_Stmt (Block : in out O_Case_Block; Value : O_Enode);
+ -- A choice branch is composed of expr, range or default choices.
+ -- A choice branch is enclosed between a Start_Choice and a Finish_Choice.
+ -- The statements are after the finish_choice.
+ procedure Start_Choice (Block : in out O_Case_Block);
+ procedure New_Expr_Choice (Block : in out O_Case_Block; Expr : O_Cnode);
+ procedure New_Range_Choice (Block : in out O_Case_Block;
+ Low, High : O_Cnode);
+ procedure New_Default_Choice (Block : in out O_Case_Block);
+ procedure Finish_Choice (Block : in out O_Case_Block);
+ procedure Finish_Case_Stmt (Block : in out O_Case_Block);
+
+private
+ use LLVM.Core;
+
+ type O_Tnode_Type (<>);
+ type O_Tnode is access O_Tnode_Type;
+ O_Tnode_Null : constant O_Tnode := null;
+
+ type ON_Type_Kind is
+ (ON_No_Type,
+ ON_Unsigned_Type, ON_Signed_Type, ON_Enum_Type, ON_Boolean_Type,
+ ON_Float_Type,
+ ON_Array_Type, ON_Array_Sub_Type,
+ ON_Incomplete_Record_Type,
+ ON_Record_Type, ON_Union_Type,
+ ON_Incomplete_Access_Type, ON_Access_Type);
+
+ subtype ON_Scalar_Types is ON_Type_Kind range
+ ON_Unsigned_Type .. ON_Float_Type;
+
+ subtype ON_Integer_Types is ON_Type_Kind range
+ ON_Unsigned_Type .. ON_Boolean_Type;
+
+ type O_Tnode_Type (Kind : ON_Type_Kind := ON_No_Type) is record
+ LLVM : TypeRef;
+ Dbg : ValueRef;
+ case Kind is
+ when ON_No_Type =>
+ null;
+ when ON_Union_Type =>
+ Un_Size : unsigned;
+ Un_Main_Field : TypeRef;
+ when ON_Access_Type
+ | ON_Incomplete_Access_Type =>
+ Acc_Type : O_Tnode;
+ when ON_Scalar_Types =>
+ Scal_Size : Natural;
+ when ON_Array_Type
+ | ON_Array_Sub_Type =>
+ -- Type of the element
+ Arr_El_Type : O_Tnode;
+ when ON_Record_Type
+ | ON_Incomplete_Record_Type =>
+ null;
+ end case;
+ end record;
+
+ type O_Inter;
+ type O_Inter_Acc is access O_Inter;
+ type O_Inter is record
+ Itype : O_Tnode;
+ Ival : ValueRef;
+ Ident : O_Ident;
+ Next : O_Inter_Acc;
+ end record;
+
+ type On_Decl_Kind is
+ (ON_Type_Decl, ON_Completed_Type_Decl,
+ ON_Const_Decl,
+ ON_Var_Decl, ON_Local_Decl, ON_Interface_Decl,
+ ON_Subprg_Decl,
+ ON_No_Decl);
+
+ type O_Dnode (Kind : On_Decl_Kind := ON_No_Decl) is record
+ Dtype : O_Tnode;
+ LLVM : ValueRef;
+ case Kind is
+ when ON_Var_Decl
+ | ON_Const_Decl
+ | ON_Local_Decl =>
+ null;
+ when ON_Subprg_Decl =>
+ Subprg_Id : O_Ident;
+ Nbr_Args : unsigned;
+ Subprg_Inters : O_Inter_Acc;
+ when ON_Interface_Decl =>
+ Inter : O_Inter_Acc;
+ when others =>
+ null;
+ end case;
+ end record;
+
+ O_Dnode_Null : constant O_Dnode := (Kind => ON_No_Decl,
+ Dtype => O_Tnode_Null,
+ LLVM => Null_ValueRef);
+
+ type OF_Kind is (OF_None, OF_Record, OF_Union);
+ type O_Fnode (Kind : OF_Kind := OF_None) is record
+ Ftype : O_Tnode;
+ case Kind is
+ when OF_None =>
+ null;
+ when OF_Record =>
+ Index : Natural;
+ when OF_Union =>
+ Utype : TypeRef;
+ end case;
+ end record;
+
+ O_Fnode_Null : constant O_Fnode := (Kind => OF_None,
+ Ftype => O_Tnode_Null);
+
+ type O_Anode_Type;
+ type O_Anode is access O_Anode_Type;
+ type O_Anode_Type is record
+ Next : O_Anode;
+ Formal : O_Dnode;
+ Actual : O_Enode;
+ end record;
+
+ type O_Cnode is record
+ LLVM : ValueRef;
+ Ctype : O_Tnode;
+ end record;
+ O_Cnode_Null : constant O_Cnode := (LLVM => Null_ValueRef,
+ Ctype => O_Tnode_Null);
+
+ type O_Enode is record
+ LLVM : ValueRef;
+ Etype : O_Tnode;
+ end record;
+ O_Enode_Null : constant O_Enode := (LLVM => Null_ValueRef,
+ Etype => O_Tnode_Null);
+
+
+ type O_Lnode is record
+ -- If True, the LLVM component is the value (used for arguments).
+ -- If False, the LLVM component is the address of the value (used
+ -- for everything else).
+ Direct : Boolean;
+ LLVM : ValueRef;
+ Ltype : O_Tnode;
+ end record;
+
+ O_Lnode_Null : constant O_Lnode := (False, Null_ValueRef, O_Tnode_Null);
+
+ type O_Snode is record
+ -- First BB in the loop body.
+ Bb_Entry : BasicBlockRef;
+
+ -- BB after the loop.
+ Bb_Exit : BasicBlockRef;
+ end record;
+
+ O_Snode_Null : constant O_Snode := (Null_BasicBlockRef,
+ Null_BasicBlockRef);
+
+ type O_Inter_List is record
+ Ident : O_Ident;
+ Storage : O_Storage;
+ Res_Type : O_Tnode;
+ Nbr_Inter : Natural;
+ First_Inter, Last_Inter : O_Inter_Acc;
+ end record;
+
+ type O_Element;
+ type O_Element_Acc is access O_Element;
+ type O_Element is record
+ -- Identifier for the element
+ Ident : O_Ident;
+
+ -- Type of the element
+ Etype : O_Tnode;
+
+ -- Next element (in the linked list)
+ Next : O_Element_Acc;
+ end record;
+
+ -- Record and union builder.
+ type O_Element_List is record
+ Nbr_Elements : Natural;
+
+ -- For record: the access to the incomplete (but named) type.
+ Rec_Type : O_Tnode;
+
+ -- For unions: biggest for size and alignment
+ Size : unsigned;
+ Align : Unsigned_32;
+ Align_Type : TypeRef;
+
+ First_Elem, Last_Elem : O_Element_Acc;
+ end record;
+
+ type ValueRefArray_Acc is access ValueRefArray;
+
+ type O_Record_Aggr_List is record
+ -- Current number of elements in Vals.
+ Len : unsigned;
+
+ -- Value of elements.
+ Vals : ValueRefArray_Acc;
+
+ -- Type of the aggregate.
+ Atype : O_Tnode;
+ end record;
+
+ type O_Array_Aggr_List is record
+ -- Current number of elements in Vals.
+ Len : unsigned;
+
+ -- Value of elements.
+ Vals : ValueRefArray_Acc;
+ El_Type : TypeRef;
+
+ -- Type of the aggregate.
+ Atype : O_Tnode;
+ end record;
+
+ type O_Assoc_List is record
+ Subprg : O_Dnode;
+ Idx : unsigned;
+ Vals : ValueRefArray_Acc;
+ end record;
+
+ type O_Enum_List is record
+ LLVM : TypeRef;
+ Num : Natural;
+ Etype : O_Tnode;
+ end record;
+
+ type O_Choice_Type is record
+ Low, High : ValueRef;
+ Bb : BasicBlockRef;
+ end record;
+
+ type O_Choice_Array is array (Natural range <>) of O_Choice_Type;
+ type O_Choice_Array_Acc is access O_Choice_Array;
+
+ type O_Case_Block is record
+ -- BB before the case.
+ BB_Prev : BasicBlockRef;
+
+ -- Select expression
+ Value : ValueRef;
+ Vtype : O_Tnode;
+
+ -- BB after the case statement.
+ BB_Next : BasicBlockRef;
+
+ -- BB for others
+ BB_Others : BasicBlockRef;
+
+ -- BB for the current choice
+ BB_Choice : BasicBlockRef;
+
+ -- List of choices.
+ Nbr_Choices : Natural;
+ Choices : O_Choice_Array_Acc;
+ end record;
+
+ type O_If_Block is record
+ -- The next basic block.
+ -- After the 'If', this is the BB for the else part. If there is no
+ -- else part, this is the BB for statements after the if.
+ -- After the 'else', this is the BB for statements after the if.
+ Bb : BasicBlockRef;
+ end record;
+
+ function Get_LLVM_Type (Atype : O_Tnode) return TypeRef;
+
+ -- Builder for statements.
+ Builder : BuilderRef;
+
+ -- Builder for declarations (local variables).
+ Decl_Builder : BuilderRef;
+
+ Llvm_Dbg_Declare : ValueRef;
+end Ortho_LLVM;