gcc/ada/exp_ch4.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                              E X P _ C H 4                               --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2020, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
  19 -- http://www.gnu.org/licenses for a complete copy of the license.          --
  20 --                                                                          --
  21 -- GNAT was originally developed  by the GNAT team at  New York University. --
  22 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  23 --                                                                          --
  24 ------------------------------------------------------------------------------
  25
  26 --  Expand routines for chapter 4 constructs
  27
  28 with Types; use Types;
  29
  30 package Exp_Ch4 is
  31
  32    procedure Expand_N_Allocator                   (N : Node_Id);
  33    procedure Expand_N_And_Then                    (N : Node_Id);
  34    procedure Expand_N_Case_Expression             (N : Node_Id);
  35    procedure Expand_N_Explicit_Dereference        (N : Node_Id);
  36    procedure Expand_N_Expression_With_Actions     (N : Node_Id);
  37    procedure Expand_N_If_Expression               (N : Node_Id);
  38    procedure Expand_N_In                          (N : Node_Id);
  39    procedure Expand_N_Indexed_Component           (N : Node_Id);
  40    procedure Expand_N_Not_In                      (N : Node_Id);
  41    procedure Expand_N_Null                        (N : Node_Id);
  42    procedure Expand_N_Op_Abs                      (N : Node_Id);
  43    procedure Expand_N_Op_Add                      (N : Node_Id);
  44    procedure Expand_N_Op_And                      (N : Node_Id);
  45    procedure Expand_N_Op_Concat                   (N : Node_Id);
  46    procedure Expand_N_Op_Divide                   (N : Node_Id);
  47    procedure Expand_N_Op_Expon                    (N : Node_Id);
  48    procedure Expand_N_Op_Eq                       (N : Node_Id);
  49    procedure Expand_N_Op_Ge                       (N : Node_Id);
  50    procedure Expand_N_Op_Gt                       (N : Node_Id);
  51    procedure Expand_N_Op_Le                       (N : Node_Id);
  52    procedure Expand_N_Op_Lt                       (N : Node_Id);
  53    procedure Expand_N_Op_Minus                    (N : Node_Id);
  54    procedure Expand_N_Op_Mod                      (N : Node_Id);
  55    procedure Expand_N_Op_Multiply                 (N : Node_Id);
  56    procedure Expand_N_Op_Ne                       (N : Node_Id);
  57    procedure Expand_N_Op_Not                      (N : Node_Id);
  58    procedure Expand_N_Op_Or                       (N : Node_Id);
  59    procedure Expand_N_Op_Plus                     (N : Node_Id);
  60    procedure Expand_N_Op_Rem                      (N : Node_Id);
  61    procedure Expand_N_Op_Rotate_Left              (N : Node_Id);
  62    procedure Expand_N_Op_Rotate_Right             (N : Node_Id);
  63    procedure Expand_N_Op_Shift_Left               (N : Node_Id);
  64    procedure Expand_N_Op_Shift_Right              (N : Node_Id);
  65    procedure Expand_N_Op_Shift_Right_Arithmetic   (N : Node_Id);
  66    procedure Expand_N_Op_Subtract                 (N : Node_Id);
  67    procedure Expand_N_Op_Xor                      (N : Node_Id);
  68    procedure Expand_N_Or_Else                     (N : Node_Id);
  69    procedure Expand_N_Qualified_Expression        (N : Node_Id);
  70    procedure Expand_N_Quantified_Expression       (N : Node_Id);
  71    procedure Expand_N_Selected_Component          (N : Node_Id);
  72    procedure Expand_N_Slice                       (N : Node_Id);
  73    procedure Expand_N_Type_Conversion             (N : Node_Id);
  74    procedure Expand_N_Unchecked_Expression        (N : Node_Id);
  75    procedure Expand_N_Unchecked_Type_Conversion   (N : Node_Id);
  76
  77    function Build_Eq_Call
  78      (Typ : Entity_Id;
  79       Loc : Source_Ptr;
  80       Lhs : Node_Id;
  81       Rhs : Node_Id) return Node_Id;
  82    --  AI05-0123: Locate primitive equality for type if it exists, and build
  83    --  the corresponding call. If operation is abstract, replace call with
  84    --  an explicit raise. Return Empty if there is no primitive.
  85    --  Used in the construction of record-equality routines for records here
  86    --  and for variant records in exp_ch3.adb. These two paths are distinct
  87    --  for historical but also technical reasons: for variant records the
  88    --  constructed function includes a case statement with nested returns,
  89    --  while for records without variants only a simple expression is needed.
  90
  91    function Expand_Record_Equality
  92      (Nod    : Node_Id;
  93       Typ    : Entity_Id;
  94       Lhs    : Node_Id;
  95       Rhs    : Node_Id;
  96       Bodies : List_Id) return Node_Id;
  97    --  Expand a record equality into an expression that compares the fields
  98    --  individually to yield the required Boolean result. Loc is the
  99    --  location for the generated nodes. Typ is the type of the record, and
 100    --  Lhs, Rhs are the record expressions to be compared, these
 101    --  expressions need not to be analyzed but have to be side-effect free.
 102    --  Bodies is a list on which to attach bodies of local functions that
 103    --  are created in the process. This is the responsibility of the caller
 104    --  to insert those bodies at the right place. Nod provides the Sloc
 105    --  value for generated code.
 106
 107    procedure Expand_Set_Membership (N : Node_Id);
 108    --  For each choice of a set membership, we create a simple equality or
 109    --  membership test. The whole membership is rewritten connecting these
 110    --  with OR ELSE.
 111
 112    function Integer_Promotion_Possible (N : Node_Id) return Boolean;
 113    --  Returns true if the node is a type conversion whose operand is an
 114    --  arithmetic operation on signed integers, and the base type of the
 115    --  signed integer type is smaller than Standard.Integer. In such case we
 116    --  have special circuitry in Expand_N_Type_Conversion to promote both of
 117    --  the operands to type Integer.
 118
 119 end Exp_Ch4;