+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- E X P A N D E R --
--- --
--- B o d y --
--- --
--- $Revision: 1.1.16.1 $
--- --
--- Copyright (C) 1992-2001 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 2, 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 COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
--- --
--- GNAT was originally developed by the GNAT team at New York University. --
--- Extensive contributions were provided by Ada Core Technologies Inc. --
--- --
-------------------------------------------------------------------------------
-
-with Atree; use Atree;
-with Debug_A; use Debug_A;
-with Errout; use Errout;
-with Exp_Aggr; use Exp_Aggr;
-with Exp_Attr; use Exp_Attr;
-with Exp_Ch2; use Exp_Ch2;
-with Exp_Ch3; use Exp_Ch3;
-with Exp_Ch4; use Exp_Ch4;
-with Exp_Ch5; use Exp_Ch5;
-with Exp_Ch6; use Exp_Ch6;
-with Exp_Ch7; use Exp_Ch7;
-with Exp_Ch8; use Exp_Ch8;
-with Exp_Ch9; use Exp_Ch9;
-with Exp_Ch11; use Exp_Ch11;
-with Exp_Ch12; use Exp_Ch12;
-with Exp_Ch13; use Exp_Ch13;
-with Exp_Prag; use Exp_Prag;
-with Opt; use Opt;
-with Sem; use Sem;
-with Sem_Ch8; use Sem_Ch8;
-with Sem_Util; use Sem_Util;
-with Sinfo; use Sinfo;
-with Table;
-
-package body Expander is
-
- ----------------
- -- Local Data --
- ----------------
-
- -- The following table is used to save values of the Expander_Active
- -- flag when they are saved by Expander_Mode_Save_And_Set. We use an
- -- extendible table (which is a bit of overkill) because it is easier
- -- than figuring out a maximum value or bothering with range checks!
-
- package Expander_Flags is new Table.Table (
- Table_Component_Type => Boolean,
- Table_Index_Type => Int,
- Table_Low_Bound => 0,
- Table_Initial => 32,
- Table_Increment => 200,
- Table_Name => "Expander_Flags");
-
- ------------
- -- Expand --
- ------------
-
- procedure Expand (N : Node_Id) is
- begin
- -- If we were analyzing a default expression the Full_Analysis flag
- -- must have be off. If we are in expansion mode then we must be
- -- performing a full analysis. If we are analyzing a generic then
- -- Expansion must be off.
-
- pragma Assert
- (not (Full_Analysis and then In_Default_Expression)
- and then (Full_Analysis or else not Expander_Active)
- and then not (Inside_A_Generic and then Expander_Active));
-
- -- There are three reasons for the Expander_Active flag to be false.
- --
- -- The first is when are not generating code. In this mode the
- -- Full_Analysis flag indicates whether we are performing a complete
- -- analysis, in which case Full_Analysis = True or a pre-analysis in
- -- which case Full_Analysis = False. See the spec of Sem for more
- -- info on this.
- --
- -- The second reason for the Expander_Active flag to be False is that
- -- we are performing a pre-analysis. During pre-analysis all
- -- expansion activity is turned off to make sure nodes are
- -- semantically decorated but no extra nodes are generated. This is
- -- for instance needed for the first pass of aggregate semantic
- -- processing. Note that in this case the Full_Analysis flag is set
- -- to False because the node will subsequently be re-analyzed with
- -- expansion on (see the spec of sem).
-
- -- Finally, expansion is turned off in a regular compilation if there
- -- are semantic errors. In that case there will be no further expansion,
- -- but one cleanup action may be required: if a transient scope was
- -- created (e.g. for a function that returns an unconstrained type)
- -- the scope may still be on the stack, and must be removed explicitly,
- -- given that the expansion actions that would normally process it will
- -- not take place. This prevents cascaded errors due to stack mismatch.
-
- if not Expander_Active then
- Set_Analyzed (N, Full_Analysis);
-
- if Errors_Detected > 0
- and then Scope_Is_Transient
- then
- Scope_Stack.Table
- (Scope_Stack.Last).Actions_To_Be_Wrapped_Before := No_List;
- Scope_Stack.Table
- (Scope_Stack.Last).Actions_To_Be_Wrapped_After := No_List;
-
- Pop_Scope;
- end if;
-
- return;
-
- else
-
- Debug_A_Entry ("expanding ", N);
-
- -- Processing depends on node kind. For full details on the expansion
- -- activity required in each case, see bodies of corresponding
- -- expand routines
-
- case Nkind (N) is
-
- when N_Abort_Statement =>
- Expand_N_Abort_Statement (N);
-
- when N_Accept_Statement =>
- Expand_N_Accept_Statement (N);
-
- when N_Aggregate =>
- Expand_N_Aggregate (N);
-
- when N_Allocator =>
- Expand_N_Allocator (N);
-
- when N_And_Then =>
- Expand_N_And_Then (N);
-
- when N_Assignment_Statement =>
- Expand_N_Assignment_Statement (N);
-
- when N_Asynchronous_Select =>
- Expand_N_Asynchronous_Select (N);
-
- when N_Attribute_Definition_Clause =>
- Expand_N_Attribute_Definition_Clause (N);
-
- when N_Attribute_Reference =>
- Expand_N_Attribute_Reference (N);
-
- when N_Block_Statement =>
- Expand_N_Block_Statement (N);
-
- when N_Case_Statement =>
- Expand_N_Case_Statement (N);
-
- when N_Conditional_Entry_Call =>
- Expand_N_Conditional_Entry_Call (N);
-
- when N_Conditional_Expression =>
- Expand_N_Conditional_Expression (N);
-
- when N_Delay_Relative_Statement =>
- Expand_N_Delay_Relative_Statement (N);
-
- when N_Delay_Until_Statement =>
- Expand_N_Delay_Until_Statement (N);
-
- when N_Entry_Body =>
- Expand_N_Entry_Body (N);
-
- when N_Entry_Call_Statement =>
- Expand_N_Entry_Call_Statement (N);
-
- when N_Entry_Declaration =>
- Expand_N_Entry_Declaration (N);
-
- when N_Exception_Declaration =>
- Expand_N_Exception_Declaration (N);
-
- when N_Exception_Renaming_Declaration =>
- Expand_N_Exception_Renaming_Declaration (N);
-
- when N_Exit_Statement =>
- Expand_N_Exit_Statement (N);
-
- when N_Expanded_Name =>
- Expand_N_Expanded_Name (N);
-
- when N_Explicit_Dereference =>
- Expand_N_Explicit_Dereference (N);
-
- when N_Extension_Aggregate =>
- Expand_N_Extension_Aggregate (N);
-
- when N_Freeze_Entity =>
- Expand_N_Freeze_Entity (N);
-
- when N_Full_Type_Declaration =>
- Expand_N_Full_Type_Declaration (N);
-
- when N_Function_Call =>
- Expand_N_Function_Call (N);
-
- when N_Generic_Instantiation =>
- Expand_N_Generic_Instantiation (N);
-
- when N_Goto_Statement =>
- Expand_N_Goto_Statement (N);
-
- when N_Handled_Sequence_Of_Statements =>
- Expand_N_Handled_Sequence_Of_Statements (N);
-
- when N_Identifier =>
- Expand_N_Identifier (N);
-
- when N_Indexed_Component =>
- Expand_N_Indexed_Component (N);
-
- when N_If_Statement =>
- Expand_N_If_Statement (N);
-
- when N_In =>
- Expand_N_In (N);
-
- when N_Loop_Statement =>
- Expand_N_Loop_Statement (N);
-
- when N_Not_In =>
- Expand_N_Not_In (N);
-
- when N_Null =>
- Expand_N_Null (N);
-
- when N_Object_Declaration =>
- Expand_N_Object_Declaration (N);
-
- when N_Object_Renaming_Declaration =>
- Expand_N_Object_Renaming_Declaration (N);
-
- when N_Op_Add =>
- Expand_N_Op_Add (N);
-
- when N_Op_Abs =>
- Expand_N_Op_Abs (N);
-
- when N_Op_And =>
- Expand_N_Op_And (N);
-
- when N_Op_Concat =>
- Expand_N_Op_Concat (N);
-
- when N_Op_Divide =>
- Expand_N_Op_Divide (N);
-
- when N_Op_Eq =>
- Expand_N_Op_Eq (N);
-
- when N_Op_Expon =>
- Expand_N_Op_Expon (N);
-
- when N_Op_Ge =>
- Expand_N_Op_Ge (N);
-
- when N_Op_Gt =>
- Expand_N_Op_Gt (N);
-
- when N_Op_Le =>
- Expand_N_Op_Le (N);
-
- when N_Op_Lt =>
- Expand_N_Op_Lt (N);
-
- when N_Op_Minus =>
- Expand_N_Op_Minus (N);
-
- when N_Op_Mod =>
- Expand_N_Op_Mod (N);
-
- when N_Op_Multiply =>
- Expand_N_Op_Multiply (N);
-
- when N_Op_Ne =>
- Expand_N_Op_Ne (N);
-
- when N_Op_Not =>
- Expand_N_Op_Not (N);
-
- when N_Op_Or =>
- Expand_N_Op_Or (N);
-
- when N_Op_Plus =>
- Expand_N_Op_Plus (N);
-
- when N_Op_Rem =>
- Expand_N_Op_Rem (N);
-
- when N_Op_Rotate_Left =>
- Expand_N_Op_Rotate_Left (N);
-
- when N_Op_Rotate_Right =>
- Expand_N_Op_Rotate_Right (N);
-
- when N_Op_Shift_Left =>
- Expand_N_Op_Shift_Left (N);
-
- when N_Op_Shift_Right =>
- Expand_N_Op_Shift_Right (N);
-
- when N_Op_Shift_Right_Arithmetic =>
- Expand_N_Op_Shift_Right_Arithmetic (N);
-
- when N_Op_Subtract =>
- Expand_N_Op_Subtract (N);
-
- when N_Op_Xor =>
- Expand_N_Op_Xor (N);
-
- when N_Or_Else =>
- Expand_N_Or_Else (N);
-
- when N_Package_Body =>
- Expand_N_Package_Body (N);
-
- when N_Package_Declaration =>
- Expand_N_Package_Declaration (N);
-
- when N_Package_Renaming_Declaration =>
- Expand_N_Package_Renaming_Declaration (N);
-
- when N_Pragma =>
- Expand_N_Pragma (N);
-
- when N_Procedure_Call_Statement =>
- Expand_N_Procedure_Call_Statement (N);
-
- when N_Protected_Type_Declaration =>
- Expand_N_Protected_Type_Declaration (N);
-
- when N_Protected_Body =>
- Expand_N_Protected_Body (N);
-
- when N_Qualified_Expression =>
- Expand_N_Qualified_Expression (N);
-
- when N_Raise_Statement =>
- Expand_N_Raise_Statement (N);
-
- when N_Raise_Constraint_Error =>
- Expand_N_Raise_Constraint_Error (N);
-
- when N_Raise_Program_Error =>
- Expand_N_Raise_Program_Error (N);
-
- when N_Raise_Storage_Error =>
- Expand_N_Raise_Storage_Error (N);
-
- when N_Real_Literal =>
- Expand_N_Real_Literal (N);
-
- when N_Record_Representation_Clause =>
- Expand_N_Record_Representation_Clause (N);
-
- when N_Requeue_Statement =>
- Expand_N_Requeue_Statement (N);
-
- when N_Return_Statement =>
- Expand_N_Return_Statement (N);
-
- when N_Selected_Component =>
- Expand_N_Selected_Component (N);
-
- when N_Selective_Accept =>
- Expand_N_Selective_Accept (N);
-
- when N_Single_Task_Declaration =>
- Expand_N_Single_Task_Declaration (N);
-
- when N_Slice =>
- Expand_N_Slice (N);
-
- when N_Subtype_Indication =>
- Expand_N_Subtype_Indication (N);
-
- when N_Subprogram_Body =>
- Expand_N_Subprogram_Body (N);
-
- when N_Subprogram_Body_Stub =>
- Expand_N_Subprogram_Body_Stub (N);
-
- when N_Subprogram_Declaration =>
- Expand_N_Subprogram_Declaration (N);
-
- when N_Subprogram_Info =>
- Expand_N_Subprogram_Info (N);
-
- when N_Task_Body =>
- Expand_N_Task_Body (N);
-
- when N_Task_Type_Declaration =>
- Expand_N_Task_Type_Declaration (N);
-
- when N_Timed_Entry_Call =>
- Expand_N_Timed_Entry_Call (N);
-
- when N_Type_Conversion =>
- Expand_N_Type_Conversion (N);
-
- when N_Unchecked_Expression =>
- Expand_N_Unchecked_Expression (N);
-
- when N_Unchecked_Type_Conversion =>
- Expand_N_Unchecked_Type_Conversion (N);
-
- when N_Variant_Part =>
- Expand_N_Variant_Part (N);
-
- -- For all other node kinds, no expansion activity is required
-
- when others => null;
-
- end case;
-
- -- Set result as analyzed and then do a possible transient wrap. The
- -- transient wrap must be done after the Analyzed flag is set on, so
- -- that we do not get a recursive attempt to expand the node N.
-
- Set_Analyzed (N);
-
- -- Deal with transient scopes
-
- if Scope_Is_Transient and then N = Node_To_Be_Wrapped then
-
- case Nkind (N) is
- when N_Statement_Other_Than_Procedure_Call |
- N_Procedure_Call_Statement =>
- Wrap_Transient_Statement (N);
-
- when N_Object_Declaration |
- N_Object_Renaming_Declaration |
- N_Subtype_Declaration =>
- Wrap_Transient_Declaration (N);
-
- when others => Wrap_Transient_Expression (N);
- end case;
- end if;
-
- Debug_A_Exit ("expanding ", N, " (done)");
- end if;
- end Expand;
-
- ---------------------------
- -- Expander_Mode_Restore --
- ---------------------------
-
- procedure Expander_Mode_Restore is
- begin
- Expander_Active := Expander_Flags.Table (Expander_Flags.Last);
- Expander_Flags.Decrement_Last;
-
- if Errors_Detected /= 0 then
- Expander_Active := False;
- end if;
- end Expander_Mode_Restore;
-
- --------------------------------
- -- Expander_Mode_Save_And_Set --
- --------------------------------
-
- procedure Expander_Mode_Save_And_Set (Status : Boolean) is
- begin
- Expander_Flags.Increment_Last;
- Expander_Flags.Table (Expander_Flags.Last) := Expander_Active;
- Expander_Active := Status;
- end Expander_Mode_Save_And_Set;
-
-end Expander;
projects / msp430-gcc.git / blobdiff