X-Git-Url: https://oss.titaniummirror.com/gitweb/?a=blobdiff_plain;f=gcc%2Fada%2Ftrans.c;fp=gcc%2Fada%2Ftrans.c;h=0000000000000000000000000000000000000000;hb=6fed43773c9b0ce596dca5686f37ac3fc0fa11c0;hp=f33fee6e0bebb0101f4688a80b8b3feea45c2f85;hpb=27b11d56b743098deb193d510b337ba22dc52e5c;p=msp430-gcc.git diff --git a/gcc/ada/trans.c b/gcc/ada/trans.c deleted file mode 100644 index f33fee6e..00000000 --- a/gcc/ada/trans.c +++ /dev/null @@ -1,5454 +0,0 @@ -/**************************************************************************** - * * - * GNAT COMPILER COMPONENTS * - * * - * T R A N S * - * * - * C Implementation File * - * * - * $Revision: 1.11.2.2 $ - * * - * 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. * - * * - ****************************************************************************/ - -#include "config.h" -#include "system.h" -#include "tree.h" -#include "real.h" -#include "flags.h" -#include "rtl.h" -#include "expr.h" -#include "ggc.h" -#include "function.h" -#include "debug.h" -#include "output.h" -#include "ada.h" -#include "types.h" -#include "atree.h" -#include "elists.h" -#include "namet.h" -#include "nlists.h" -#include "snames.h" -#include "stringt.h" -#include "uintp.h" -#include "urealp.h" -#include "fe.h" -#include "sinfo.h" -#include "einfo.h" -#include "ada-tree.h" -#include "gigi.h" - -int max_gnat_nodes; -int number_names; -struct Node *Nodes_Ptr; -Node_Id *Next_Node_Ptr; -Node_Id *Prev_Node_Ptr; -struct Elist_Header *Elists_Ptr; -struct Elmt_Item *Elmts_Ptr; -struct String_Entry *Strings_Ptr; -Char_Code *String_Chars_Ptr; -struct List_Header *List_Headers_Ptr; - -/* Current filename without path. */ -const char *ref_filename; - -/* Flag indicating whether file names are discarded in exception messages */ -int discard_file_names; - -/* If true, then gigi is being called on an analyzed but unexpanded - tree, and the only purpose of the call is to properly annotate - types with representation information. */ -int type_annotate_only; - -/* List of TREE_LIST nodes representing a block stack. TREE_VALUE - of each gives the variable used for the setjmp buffer in the current - block, if any. TREE_PURPOSE gives the bottom condition for a loop, - if this block is for a loop. The latter is only used to save the tree - over GC. */ -tree gnu_block_stack; - -/* List of TREE_LIST nodes representing a stack of exception pointer - variables. TREE_VALUE is the VAR_DECL that stores the address of - the raised exception. Nonzero means we are in an exception - handler. Set to error_mark_node in the zero-cost case. */ -static tree gnu_except_ptr_stack; - -/* Map GNAT tree codes to GCC tree codes for simple expressions. */ -static enum tree_code gnu_codes[Number_Node_Kinds]; - -/* Current node being treated, in case gigi_abort called. */ -Node_Id error_gnat_node; - -/* Variable that stores a list of labels to be used as a goto target instead of - a return in some functions. See processing for N_Subprogram_Body. */ -static tree gnu_return_label_stack; - -static tree tree_transform PARAMS((Node_Id)); -static void elaborate_all_entities PARAMS((Node_Id)); -static void process_freeze_entity PARAMS((Node_Id)); -static void process_inlined_subprograms PARAMS((Node_Id)); -static void process_decls PARAMS((List_Id, List_Id, Node_Id, - int, int)); -static tree emit_access_check PARAMS((tree)); -static tree emit_discriminant_check PARAMS((tree, Node_Id)); -static tree emit_range_check PARAMS((tree, Node_Id)); -static tree emit_index_check PARAMS((tree, tree, tree, tree)); -static tree emit_check PARAMS((tree, tree)); -static tree convert_with_check PARAMS((Entity_Id, tree, - int, int, int)); -static int addressable_p PARAMS((tree)); -static tree assoc_to_constructor PARAMS((Node_Id, tree)); -static tree extract_values PARAMS((tree, tree)); -static tree pos_to_constructor PARAMS((Node_Id, tree, Entity_Id)); -static tree maybe_implicit_deref PARAMS((tree)); -static tree gnat_stabilize_reference_1 PARAMS((tree, int)); -static int build_unit_elab PARAMS((Entity_Id, int, tree)); - -/* Constants for +0.5 and -0.5 for float-to-integer rounding. */ -static REAL_VALUE_TYPE dconstp5; -static REAL_VALUE_TYPE dconstmp5; - -/* This is the main program of the back-end. It sets up all the table - structures and then generates code. */ - -void -gigi (gnat_root, max_gnat_node, number_name, - nodes_ptr, next_node_ptr, prev_node_ptr, elists_ptr, elmts_ptr, - strings_ptr, string_chars_ptr, list_headers_ptr, - number_units, file_info_ptr, - standard_integer, standard_long_long_float, standard_exception_type, - gigi_operating_mode) - - Node_Id gnat_root; - int max_gnat_node; - int number_name; - - struct Node *nodes_ptr; - Node_Id *next_node_ptr; - Node_Id *prev_node_ptr; - struct Elist_Header *elists_ptr; - struct Elmt_Item *elmts_ptr; - struct String_Entry *strings_ptr; - Char_Code *string_chars_ptr; - struct List_Header *list_headers_ptr; - Int number_units ATTRIBUTE_UNUSED; - char *file_info_ptr ATTRIBUTE_UNUSED; - - Entity_Id standard_integer; - Entity_Id standard_long_long_float; - Entity_Id standard_exception_type; - - Int gigi_operating_mode; -{ - tree gnu_standard_long_long_float; - tree gnu_standard_exception_type; - - max_gnat_nodes = max_gnat_node; - number_names = number_name; - Nodes_Ptr = nodes_ptr - First_Node_Id; - Next_Node_Ptr = next_node_ptr - First_Node_Id; - Prev_Node_Ptr = prev_node_ptr - First_Node_Id; - Elists_Ptr = elists_ptr - First_Elist_Id; - Elmts_Ptr = elmts_ptr - First_Elmt_Id; - Strings_Ptr = strings_ptr - First_String_Id; - String_Chars_Ptr = string_chars_ptr; - List_Headers_Ptr = list_headers_ptr - First_List_Id; - - type_annotate_only = (gigi_operating_mode == 1); - - /* See if we should discard file names in exception messages. */ - discard_file_names = (Global_Discard_Names || Debug_Flag_NN); - - if (Nkind (gnat_root) != N_Compilation_Unit) - gigi_abort (301); - - set_lineno (gnat_root, 0); - - /* Initialize ourselves. */ - init_gnat_to_gnu (); - init_dummy_type (); - init_code_table (); - - /* Enable GNAT stack checking method if needed */ - if (!Stack_Check_Probes_On_Target) - set_stack_check_libfunc (gen_rtx (SYMBOL_REF, Pmode, "_gnat_stack_check")); - - /* Save the type we made for integer as the type for Standard.Integer. - Then make the rest of the standard types. Note that some of these - may be subtypes. */ - save_gnu_tree (Base_Type (standard_integer), - TYPE_NAME (integer_type_node), 0); - - ggc_add_tree_root (&gnu_block_stack, 1); - ggc_add_tree_root (&gnu_except_ptr_stack, 1); - ggc_add_tree_root (&gnu_return_label_stack, 1); - gnu_except_ptr_stack = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); - - dconstp5 = REAL_VALUE_ATOF ("0.5", DFmode); - dconstmp5 = REAL_VALUE_ATOF ("-0.5", DFmode); - - gnu_standard_long_long_float - = gnat_to_gnu_entity (Base_Type (standard_long_long_float), NULL_TREE, 0); - gnu_standard_exception_type - = gnat_to_gnu_entity (Base_Type (standard_exception_type), NULL_TREE, 0); - - init_gigi_decls (gnu_standard_long_long_float, gnu_standard_exception_type); - - /* Emit global symbols containing context list info for the SGI Workshop - debugger */ - -#ifdef MIPS_DEBUGGING_INFO - if (Spec_Context_List != 0) - emit_unit_label (Spec_Context_List, Spec_Filename); - - if (Body_Context_List != 0) - emit_unit_label (Body_Context_List, Body_Filename); -#endif - -#ifdef ASM_OUTPUT_IDENT - if (Present (Ident_String (Main_Unit))) - ASM_OUTPUT_IDENT - (asm_out_file, - TREE_STRING_POINTER (gnat_to_gnu (Ident_String (Main_Unit)))); -#endif - - gnat_to_code (gnat_root); -} - - -/* This function is the driver of the GNAT to GCC tree transformation process. - GNAT_NODE is the root of some gnat tree. It generates code for that - part of the tree. */ - -void -gnat_to_code (gnat_node) - Node_Id gnat_node; -{ - tree gnu_root; - - /* Save node number in case error */ - error_gnat_node = gnat_node; - - gnu_root = tree_transform (gnat_node); - - /* This should just generate code, not return a value. If it returns - a value, something is wrong. */ - if (gnu_root != error_mark_node) - gigi_abort (302); -} - -/* GNAT_NODE is the root of some GNAT tree. Return the root of the GCC - tree corresponding to that GNAT tree. Normally, no code is generated. - We just return an equivalent tree which is used elsewhere to generate - code. */ - -tree -gnat_to_gnu (gnat_node) - Node_Id gnat_node; -{ - tree gnu_root; - - /* Save node number in case error */ - error_gnat_node = gnat_node; - - gnu_root = tree_transform (gnat_node); - - /* If we got no code as a result, something is wrong. */ - if (gnu_root == error_mark_node && ! type_annotate_only) - gigi_abort (303); - - return gnu_root; -} - -/* This function is the driver of the GNAT to GCC tree transformation process. - It is the entry point of the tree transformer. GNAT_NODE is the root of - some GNAT tree. Return the root of the corresponding GCC tree or - error_mark_node to signal that there is no GCC tree to return. - - The latter is the case if only code generation actions have to be performed - like in the case of if statements, loops, etc. This routine is wrapped - in the above two routines for most purposes. */ - -static tree -tree_transform (gnat_node) - Node_Id gnat_node; -{ - tree gnu_result = error_mark_node; /* Default to no value. */ - tree gnu_result_type = void_type_node; - tree gnu_expr; - tree gnu_lhs, gnu_rhs; - Node_Id gnat_temp; - Entity_Id gnat_temp_type; - - /* Set input_file_name and lineno from the Sloc in the GNAT tree. */ - set_lineno (gnat_node, 0); - - /* If this is a Statement and we are at top level, we add the statement - as an elaboration for a null tree. That will cause it to be placed - in the elaboration procedure. */ - if (global_bindings_p () - && ((IN (Nkind (gnat_node), N_Statement_Other_Than_Procedure_Call) - && Nkind (gnat_node) != N_Null_Statement) - || Nkind (gnat_node) == N_Procedure_Call_Statement - || Nkind (gnat_node) == N_Label - || (Nkind (gnat_node) == N_Handled_Sequence_Of_Statements - && (Present (Exception_Handlers (gnat_node)) - || Present (At_End_Proc (gnat_node)))) - || ((Nkind (gnat_node) == N_Raise_Constraint_Error - || Nkind (gnat_node) == N_Raise_Storage_Error - || Nkind (gnat_node) == N_Raise_Program_Error) - && (Ekind (Etype (gnat_node)) == E_Void)))) - { - add_pending_elaborations (NULL_TREE, make_transform_expr (gnat_node)); - - return error_mark_node; - } - - /* If this node is a non-static subexpression and we are only - annotating types, make this into a NULL_EXPR for non-VOID types - and error_mark_node for void return types. But allow - N_Identifier since we use it for lots of things, including - getting trees for discriminants. */ - - if (type_annotate_only - && IN (Nkind (gnat_node), N_Subexpr) - && Nkind (gnat_node) != N_Identifier - && ! Compile_Time_Known_Value (gnat_node)) - { - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - - if (TREE_CODE (gnu_result_type) == VOID_TYPE) - return error_mark_node; - else - return build1 (NULL_EXPR, gnu_result_type, - build_call_raise (raise_constraint_error_decl)); - } - - switch (Nkind (gnat_node)) - { - /********************************/ - /* Chapter 2: Lexical Elements: */ - /********************************/ - - case N_Identifier: - case N_Expanded_Name: - case N_Operator_Symbol: - case N_Defining_Identifier: - - /* If the Etype of this node does not equal the Etype of the - Entity, something is wrong with the entity map, probably in - generic instantiation. However, this does not apply to - types. Since we sometime have strange Ekind's, just do - this test for objects. Also, if the Etype of the Entity - is private, the Etype of the N_Identifier is allowed to be the - full type and also we consider a packed array type to be the - same as the original type. Finally, if the types are Itypes, - one may be a copy of the other, which is also legal. */ - - gnat_temp = (Nkind (gnat_node) == N_Defining_Identifier - ? gnat_node : Entity (gnat_node)); - gnat_temp_type = Etype (gnat_temp); - - if (Etype (gnat_node) != gnat_temp_type - && ! (Is_Packed (gnat_temp_type) - && Etype (gnat_node) == Packed_Array_Type (gnat_temp_type)) - && ! (IN (Ekind (gnat_temp_type), Private_Kind) - && Present (Full_View (gnat_temp_type)) - && ((Etype (gnat_node) == Full_View (gnat_temp_type)) - || (Is_Packed (Full_View (gnat_temp_type)) - && Etype (gnat_node) == - Packed_Array_Type (Full_View (gnat_temp_type))))) - && (!Is_Itype (Etype (gnat_node)) || !Is_Itype (gnat_temp_type)) - && (Ekind (gnat_temp) == E_Variable - || Ekind (gnat_temp) == E_Component - || Ekind (gnat_temp) == E_Constant - || Ekind (gnat_temp) == E_Loop_Parameter - || IN (Ekind (gnat_temp), Formal_Kind))) - gigi_abort (304); - - /* If this is a reference to a deferred constant whose partial view - is an unconstrained private type, the proper type is on the full - view of the constant, not on the full view of the type, which may - be unconstrained. - - This may be a reference to a type, for example in the prefix of the - attribute Position, generated for dispatching code (see Make_DT in - exp_disp,adb). In that case we need the type itself, not is parent, - in particular if it is a derived type */ - - if (Is_Private_Type (gnat_temp_type) - && Has_Unknown_Discriminants (gnat_temp_type) - && Present (Full_View (gnat_temp)) - && ! Is_Type (gnat_temp)) - { - gnat_temp = Full_View (gnat_temp); - gnat_temp_type = Etype (gnat_temp); - gnu_result_type = get_unpadded_type (gnat_temp_type); - } - else - { - /* Expand the type of this identitier first, in case it is - an enumeral literal, which only get made when the type - is expanded. There is no order-of-elaboration issue here. - We want to use the Actual_Subtype if it has already been - elaborated, otherwise the Etype. Avoid using Actual_Subtype - for packed arrays to simplify things. */ - if ((Ekind (gnat_temp) == E_Constant - || Ekind (gnat_temp) == E_Variable || Is_Formal (gnat_temp)) - && ! (Is_Array_Type (Etype (gnat_temp)) - && Present (Packed_Array_Type (Etype (gnat_temp)))) - && Present (Actual_Subtype (gnat_temp)) - && present_gnu_tree (Actual_Subtype (gnat_temp))) - gnat_temp_type = Actual_Subtype (gnat_temp); - else - gnat_temp_type = Etype (gnat_node); - - gnu_result_type = get_unpadded_type (gnat_temp_type); - } - - gnu_result = gnat_to_gnu_entity (gnat_temp, NULL_TREE, 0); - - /* If we are in an exception handler, force this variable into memory - to ensure optimization does not remove stores that appear - redundant but are actually needed in case an exception occurs. - - ??? Note that we need not do this if the variable is declared within - the handler, only if it is referenced in the handler and declared - in an enclosing block, but we have no way of testing that - right now. */ - if (TREE_VALUE (gnu_except_ptr_stack) != 0) - { - mark_addressable (gnu_result); - flush_addressof (gnu_result); - } - - /* Some objects (such as parameters passed by reference, globals of - variable size, and renamed objects) actually represent the address - of the object. In that case, we must do the dereference. Likewise, - deal with parameters to foreign convention subprograms. Call fold - here since GNU_RESULT may be a CONST_DECL. */ - if (DECL_P (gnu_result) - && (DECL_BY_REF_P (gnu_result) - || DECL_BY_COMPONENT_PTR_P (gnu_result))) - { - int ro = DECL_POINTS_TO_READONLY_P (gnu_result); - - if (DECL_BY_COMPONENT_PTR_P (gnu_result)) - gnu_result = convert (build_pointer_type (gnu_result_type), - gnu_result); - - gnu_result = build_unary_op (INDIRECT_REF, NULL_TREE, - fold (gnu_result)); - TREE_READONLY (gnu_result) = TREE_STATIC (gnu_result) = ro; - } - - /* The GNAT tree has the type of a function as the type of its result. - Also use the type of the result if the Etype is a subtype which - is nominally unconstrained. But remove any padding from the - resulting type. */ - if (TREE_CODE (TREE_TYPE (gnu_result)) == FUNCTION_TYPE - || Is_Constr_Subt_For_UN_Aliased (gnat_temp_type)) - { - gnu_result_type = TREE_TYPE (gnu_result); - if (TREE_CODE (gnu_result_type) == RECORD_TYPE - && TYPE_IS_PADDING_P (gnu_result_type)) - gnu_result_type = TREE_TYPE (TYPE_FIELDS (gnu_result_type)); - } - - /* We always want to return the underlying INTEGER_CST for an - enumeration literal to avoid the need to call fold in lots - of places. But don't do this is the parent will be taking - the address of this object. */ - if (TREE_CODE (gnu_result) == CONST_DECL) - { - gnat_temp = Parent (gnat_node); - if (DECL_CONST_CORRESPONDING_VAR (gnu_result) == 0 - || (Nkind (gnat_temp) != N_Reference - && ! (Nkind (gnat_temp) == N_Attribute_Reference - && ((Get_Attribute_Id (Attribute_Name (gnat_temp)) - == Attr_Address) - || (Get_Attribute_Id (Attribute_Name (gnat_temp)) - == Attr_Access) - || (Get_Attribute_Id (Attribute_Name (gnat_temp)) - == Attr_Unchecked_Access) - || (Get_Attribute_Id (Attribute_Name (gnat_temp)) - == Attr_Unrestricted_Access))))) - gnu_result = DECL_INITIAL (gnu_result); - } - break; - - case N_Integer_Literal: - { - tree gnu_type; - - /* Get the type of the result, looking inside any padding and - left-justified modular types. Then get the value in that type. */ - gnu_type = gnu_result_type = get_unpadded_type (Etype (gnat_node)); - - if (TREE_CODE (gnu_type) == RECORD_TYPE - && TYPE_LEFT_JUSTIFIED_MODULAR_P (gnu_type)) - gnu_type = TREE_TYPE (TYPE_FIELDS (gnu_type)); - - gnu_result = UI_To_gnu (Intval (gnat_node), gnu_type); - /* Get the type of the result, looking inside any padding and - left-justified modular types. Then get the value in that type. */ - gnu_type = gnu_result_type = get_unpadded_type (Etype (gnat_node)); - - if (TREE_CODE (gnu_type) == RECORD_TYPE - && TYPE_LEFT_JUSTIFIED_MODULAR_P (gnu_type)) - gnu_type = TREE_TYPE (TYPE_FIELDS (gnu_type)); - - gnu_result = UI_To_gnu (Intval (gnat_node), gnu_type); - - /* If the result overflows (meaning it doesn't fit in its base type) - or is outside of the range of the subtype, we have an illegal tree - entry, so abort. Note that the test for of types with biased - representation is harder, so we don't test in that case. */ - if (TREE_CONSTANT_OVERFLOW (gnu_result) - || (TREE_CODE (TYPE_MIN_VALUE (gnu_result_type)) == INTEGER_CST - && ! TYPE_BIASED_REPRESENTATION_P (gnu_result_type) - && tree_int_cst_lt (gnu_result, - TYPE_MIN_VALUE (gnu_result_type))) - || (TREE_CODE (TYPE_MAX_VALUE (gnu_result_type)) == INTEGER_CST - && ! TYPE_BIASED_REPRESENTATION_P (gnu_result_type) - && tree_int_cst_lt (TYPE_MAX_VALUE (gnu_result_type), - gnu_result))) - gigi_abort (305); - } - break; - - case N_Character_Literal: - /* If a Entity is present, it means that this was one of the - literals in a user-defined character type. In that case, - just return the value in the CONST_DECL. Otherwise, use the - character code. In that case, the base type should be an - INTEGER_TYPE, but we won't bother checking for that. */ - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - if (Present (Entity (gnat_node))) - gnu_result = DECL_INITIAL (get_gnu_tree (Entity (gnat_node))); - else - gnu_result = convert (gnu_result_type, - build_int_2 (Char_Literal_Value (gnat_node), 0)); - break; - - case N_Real_Literal: - /* If this is of a fixed-point type, the value we want is the - value of the corresponding integer. */ - if (IN (Ekind (Underlying_Type (Etype (gnat_node))), Fixed_Point_Kind)) - { - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - gnu_result = UI_To_gnu (Corresponding_Integer_Value (gnat_node), - gnu_result_type); - if (TREE_CONSTANT_OVERFLOW (gnu_result) -#if 0 - || (TREE_CODE (TYPE_MIN_VALUE (gnu_result_type)) == INTEGER_CST - && tree_int_cst_lt (gnu_result, - TYPE_MIN_VALUE (gnu_result_type))) - || (TREE_CODE (TYPE_MAX_VALUE (gnu_result_type)) == INTEGER_CST - && tree_int_cst_lt (TYPE_MAX_VALUE (gnu_result_type), - gnu_result)) -#endif - ) - gigi_abort (305); - } - /* We should never see a Vax_Float type literal, since the front end - is supposed to transform these using appropriate conversions */ - else if (Vax_Float (Underlying_Type (Etype (gnat_node)))) - gigi_abort (334); - - else - { - Ureal ur_realval = Realval (gnat_node); - - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - - /* If the real value is zero, so is the result. Otherwise, - convert it to a machine number if it isn't already. That - forces BASE to 0 or 2 and simplifies the rest of our logic. */ - if (UR_Is_Zero (ur_realval)) - gnu_result = convert (gnu_result_type, integer_zero_node); - else - { - if (! Is_Machine_Number (gnat_node)) - ur_realval - = Machine (Base_Type (Underlying_Type (Etype (gnat_node))), - ur_realval, Round_Even); - - gnu_result - = UI_To_gnu (Numerator (ur_realval), gnu_result_type); - - /* If we have a base of zero, divide by the denominator. - Otherwise, the base must be 2 and we scale the value, which - we know can fit in the mantissa of the type (hence the use - of that type above). */ - if (Rbase (ur_realval) == 0) - gnu_result - = build_binary_op (RDIV_EXPR, - get_base_type (gnu_result_type), - gnu_result, - UI_To_gnu (Denominator (ur_realval), - gnu_result_type)); - else if (Rbase (ur_realval) != 2) - gigi_abort (336); - - else - gnu_result - = build_real (gnu_result_type, - REAL_VALUE_LDEXP - (TREE_REAL_CST (gnu_result), - - UI_To_Int (Denominator (ur_realval)))); - } - - /* Now see if we need to negate the result. Do it this way to - properly handle -0. */ - if (UR_Is_Negative (Realval (gnat_node))) - gnu_result - = build_unary_op (NEGATE_EXPR, get_base_type (gnu_result_type), - gnu_result); - } - - break; - - case N_String_Literal: - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - if (TYPE_PRECISION (TREE_TYPE (gnu_result_type)) == HOST_BITS_PER_CHAR) - { - /* We assume here that all strings are of type standard.string. - "Weird" types of string have been converted to an aggregate - by the expander. */ - String_Id gnat_string = Strval (gnat_node); - int length = String_Length (gnat_string); - char *string = (char *) alloca (length + 1); - int i; - - /* Build the string with the characters in the literal. Note - that Ada strings are 1-origin. */ - for (i = 0; i < length; i++) - string[i] = Get_String_Char (gnat_string, i + 1); - - /* Put a null at the end of the string in case it's in a context - where GCC will want to treat it as a C string. */ - string[i] = 0; - - gnu_result = build_string (length, string); - - /* Strings in GCC don't normally have types, but we want - this to not be converted to the array type. */ - TREE_TYPE (gnu_result) = gnu_result_type; - } - else - { - /* Build a list consisting of each character, then make - the aggregate. */ - String_Id gnat_string = Strval (gnat_node); - int length = String_Length (gnat_string); - int i; - tree gnu_list = NULL_TREE; - - for (i = 0; i < length; i++) - gnu_list - = tree_cons (NULL_TREE, - convert (TREE_TYPE (gnu_result_type), - build_int_2 (Get_String_Char (gnat_string, - i + 1), - 0)), - gnu_list); - - gnu_result - = build_constructor (gnu_result_type, nreverse (gnu_list)); - } - break; - - case N_Pragma: - if (type_annotate_only) - break; - - /* Check for (and ignore) unrecognized pragma */ - if (! Is_Pragma_Name (Chars (gnat_node))) - break; - - switch (Get_Pragma_Id (Chars (gnat_node))) - { - case Pragma_Inspection_Point: - /* Do nothing at top level: all such variables are already - viewable. */ - if (global_bindings_p ()) - break; - - set_lineno (gnat_node, 1); - for (gnat_temp = First (Pragma_Argument_Associations (gnat_node)); - Present (gnat_temp); - gnat_temp = Next (gnat_temp)) - { - gnu_expr = gnat_to_gnu (Expression (gnat_temp)); - if (TREE_CODE (gnu_expr) == UNCONSTRAINED_ARRAY_REF) - gnu_expr = TREE_OPERAND (gnu_expr, 0); - - gnu_expr = build1 (USE_EXPR, void_type_node, gnu_expr); - TREE_SIDE_EFFECTS (gnu_expr) = 1; - expand_expr_stmt (gnu_expr); - } - break; - - case Pragma_Optimize: - switch (Chars (Expression - (First (Pragma_Argument_Associations (gnat_node))))) - { - case Name_Time: case Name_Space: - if (optimize == 0) - post_error ("insufficient -O value?", gnat_node); - break; - - case Name_Off: - if (optimize != 0) - post_error ("must specify -O0?", gnat_node); - break; - - default: - gigi_abort (331); - break; - } - break; - - case Pragma_Reviewable: - if (write_symbols == NO_DEBUG) - post_error ("must specify -g?", gnat_node); - break; - } - break; - - /**************************************/ - /* Chapter 3: Declarations and Types: */ - /**************************************/ - - case N_Subtype_Declaration: - case N_Full_Type_Declaration: - case N_Incomplete_Type_Declaration: - case N_Private_Type_Declaration: - case N_Private_Extension_Declaration: - case N_Task_Type_Declaration: - process_type (Defining_Entity (gnat_node)); - break; - - case N_Object_Declaration: - case N_Exception_Declaration: - gnat_temp = Defining_Entity (gnat_node); - - /* If we are just annotating types and this object has an unconstrained - or task type, don't elaborate it. */ - if (type_annotate_only - && (((Is_Array_Type (Etype (gnat_temp)) - || Is_Record_Type (Etype (gnat_temp))) - && ! Is_Constrained (Etype (gnat_temp))) - || Is_Concurrent_Type (Etype (gnat_temp)))) - break; - - if (Present (Expression (gnat_node)) - && ! (Nkind (gnat_node) == N_Object_Declaration - && No_Initialization (gnat_node)) - && (! type_annotate_only - || Compile_Time_Known_Value (Expression (gnat_node)))) - { - gnu_expr = gnat_to_gnu (Expression (gnat_node)); - if (Do_Range_Check (Expression (gnat_node))) - gnu_expr = emit_range_check (gnu_expr, Etype (gnat_temp)); - - /* If this object has its elaboration delayed, we must force - evaluation of GNU_EXPR right now and save it for when the object - is frozen. */ - if (Present (Freeze_Node (gnat_temp))) - { - if ((Is_Public (gnat_temp) || global_bindings_p ()) - && ! TREE_CONSTANT (gnu_expr)) - gnu_expr - = create_var_decl (create_concat_name (gnat_temp, "init"), - NULL_TREE, TREE_TYPE (gnu_expr), gnu_expr, - 0, Is_Public (gnat_temp), 0, 0, 0); - else - gnu_expr = maybe_variable (gnu_expr, Expression (gnat_node)); - - save_gnu_tree (gnat_node, gnu_expr, 1); - } - } - else - gnu_expr = 0; - - if (type_annotate_only && gnu_expr != 0 - && TREE_CODE (gnu_expr) == ERROR_MARK) - gnu_expr = 0; - - if (No (Freeze_Node (gnat_temp))) - gnat_to_gnu_entity (gnat_temp, gnu_expr, 1); - break; - - case N_Object_Renaming_Declaration: - - gnat_temp = Defining_Entity (gnat_node); - - /* Don't do anything if this renaming handled by the front end. - or if we are just annotating types and this object has an - unconstrained or task type, don't elaborate it. */ - if (! Is_Renaming_Of_Object (gnat_temp) - && ! (type_annotate_only - && (((Is_Array_Type (Etype (gnat_temp)) - || Is_Record_Type (Etype (gnat_temp))) - && ! Is_Constrained (Etype (gnat_temp))) - || Is_Concurrent_Type (Etype (gnat_temp))))) - { - gnu_expr = gnat_to_gnu (Renamed_Object (gnat_temp)); - gnat_to_gnu_entity (gnat_temp, gnu_expr, 1); - } - break; - - case N_Implicit_Label_Declaration: - gnat_to_gnu_entity (Defining_Entity (gnat_node), NULL_TREE, 1); - break; - - case N_Subprogram_Renaming_Declaration: - case N_Package_Renaming_Declaration: - case N_Exception_Renaming_Declaration: - case N_Number_Declaration: - /* These are fully handled in the front end. */ - break; - - /*************************************/ - /* Chapter 4: Names and Expressions: */ - /*************************************/ - - case N_Explicit_Dereference: - gnu_result = gnat_to_gnu (Prefix (gnat_node)); - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - - /* Emit access check if necessary */ - if (Do_Access_Check (gnat_node)) - gnu_result = emit_access_check (gnu_result); - - gnu_result = build_unary_op (INDIRECT_REF, NULL_TREE, gnu_result); - break; - - case N_Indexed_Component: - { - tree gnu_array_object = gnat_to_gnu (Prefix (gnat_node)); - tree gnu_type; - int ndim; - int i; - Node_Id *gnat_expr_array; - - /* Emit access check if necessary */ - if (Do_Access_Check (gnat_node)) - gnu_array_object = emit_access_check (gnu_array_object); - - gnu_array_object = maybe_implicit_deref (gnu_array_object); - gnu_array_object = maybe_unconstrained_array (gnu_array_object); - - /* If we got a padded type, remove it too. */ - if (TREE_CODE (TREE_TYPE (gnu_array_object)) == RECORD_TYPE - && TYPE_IS_PADDING_P (TREE_TYPE (gnu_array_object))) - gnu_array_object - = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_array_object))), - gnu_array_object); - - gnu_result = gnu_array_object; - - /* First compute the number of dimensions of the array, then - fill the expression array, the order depending on whether - this is a Convention_Fortran array or not. */ - for (ndim = 1, gnu_type = TREE_TYPE (gnu_array_object); - TREE_CODE (TREE_TYPE (gnu_type)) == ARRAY_TYPE - && TYPE_MULTI_ARRAY_P (TREE_TYPE (gnu_type)); - ndim++, gnu_type = TREE_TYPE (gnu_type)) - ; - - gnat_expr_array = (Node_Id *) alloca (ndim * sizeof (Node_Id)); - - if (TYPE_CONVENTION_FORTRAN_P (TREE_TYPE (gnu_array_object))) - for (i = ndim - 1, gnat_temp = First (Expressions (gnat_node)); - i >= 0; - i--, gnat_temp = Next (gnat_temp)) - gnat_expr_array[i] = gnat_temp; - else - for (i = 0, gnat_temp = First (Expressions (gnat_node)); - i < ndim; - i++, gnat_temp = Next (gnat_temp)) - gnat_expr_array[i] = gnat_temp; - - for (i = 0, gnu_type = TREE_TYPE (gnu_array_object); - i < ndim; i++, gnu_type = TREE_TYPE (gnu_type)) - { - if (TREE_CODE (gnu_type) != ARRAY_TYPE) - gigi_abort (307); - - gnat_temp = gnat_expr_array[i]; - gnu_expr = gnat_to_gnu (gnat_temp); - - if (Do_Range_Check (gnat_temp)) - gnu_expr - = emit_index_check - (gnu_array_object, gnu_expr, - TYPE_MIN_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))), - TYPE_MAX_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type)))); - - gnu_result = build_binary_op (ARRAY_REF, NULL_TREE, - gnu_result, gnu_expr); - } - } - - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - break; - - case N_Slice: - { - tree gnu_type; - Node_Id gnat_range_node = Discrete_Range (gnat_node); - - gnu_result = gnat_to_gnu (Prefix (gnat_node)); - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - - /* Emit access check if necessary */ - if (Do_Access_Check (gnat_node)) - gnu_result = emit_access_check (gnu_result); - - /* Do any implicit dereferences of the prefix and do any needed - range check. */ - gnu_result = maybe_implicit_deref (gnu_result); - gnu_result = maybe_unconstrained_array (gnu_result); - gnu_type = TREE_TYPE (gnu_result); - if (Do_Range_Check (gnat_range_node)) - { - /* Get the bounds of the slice. */ - tree gnu_index_type - = TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_result_type)); - tree gnu_min_expr = TYPE_MIN_VALUE (gnu_index_type); - tree gnu_max_expr = TYPE_MAX_VALUE (gnu_index_type); - tree gnu_expr_l, gnu_expr_h, gnu_expr_type; - - /* Check to see that the minimum slice value is in range */ - gnu_expr_l - = emit_index_check - (gnu_result, gnu_min_expr, - TYPE_MIN_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))), - TYPE_MAX_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type)))); - - /* Check to see that the maximum slice value is in range */ - gnu_expr_h - = emit_index_check - (gnu_result, gnu_max_expr, - TYPE_MIN_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))), - TYPE_MAX_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type)))); - - /* Derive a good type to convert everything too */ - gnu_expr_type = get_base_type (TREE_TYPE (gnu_expr_l)); - - /* Build a compound expression that does the range checks */ - gnu_expr - = build_binary_op (COMPOUND_EXPR, gnu_expr_type, - convert (gnu_expr_type, gnu_expr_h), - convert (gnu_expr_type, gnu_expr_l)); - - /* Build a conditional expression that returns the range checks - expression if the slice range is not null (max >= min) or - returns the min if the slice range is null */ - gnu_expr - = fold (build (COND_EXPR, gnu_expr_type, - build_binary_op (GE_EXPR, gnu_expr_type, - convert (gnu_expr_type, - gnu_max_expr), - convert (gnu_expr_type, - gnu_min_expr)), - gnu_expr, gnu_min_expr)); - } - else - gnu_expr = TYPE_MIN_VALUE (TYPE_DOMAIN (gnu_result_type)); - - gnu_result = build_binary_op (ARRAY_RANGE_REF, gnu_result_type, - gnu_result, gnu_expr); - } - break; - - case N_Selected_Component: - { - tree gnu_prefix = gnat_to_gnu (Prefix (gnat_node)); - Entity_Id gnat_field = Entity (Selector_Name (gnat_node)); - Entity_Id gnat_pref_type = Etype (Prefix (gnat_node)); - tree gnu_field; - - while (IN (Ekind (gnat_pref_type), Incomplete_Or_Private_Kind) - || IN (Ekind (gnat_pref_type), Access_Kind)) - { - if (IN (Ekind (gnat_pref_type), Incomplete_Or_Private_Kind)) - gnat_pref_type = Underlying_Type (gnat_pref_type); - else if (IN (Ekind (gnat_pref_type), Access_Kind)) - gnat_pref_type = Designated_Type (gnat_pref_type); - } - - if (Do_Access_Check (gnat_node)) - gnu_prefix = emit_access_check (gnu_prefix); - - gnu_prefix = maybe_implicit_deref (gnu_prefix); - - /* For discriminant references in tagged types always substitute the - corresponding discriminant as the actual selected component. */ - - if (Is_Tagged_Type (gnat_pref_type)) - while (Present (Corresponding_Discriminant (gnat_field))) - gnat_field = Corresponding_Discriminant (gnat_field); - - /* For discriminant references of untagged types always substitute the - corresponding girder discriminant. */ - - else if (Present (Corresponding_Discriminant (gnat_field))) - gnat_field = Original_Record_Component (gnat_field); - - /* Handle extracting the real or imaginary part of a complex. - The real part is the first field and the imaginary the last. */ - - if (TREE_CODE (TREE_TYPE (gnu_prefix)) == COMPLEX_TYPE) - gnu_result = build_unary_op (Present (Next_Entity (gnat_field)) - ? REALPART_EXPR : IMAGPART_EXPR, - NULL_TREE, gnu_prefix); - else - { - gnu_field = gnat_to_gnu_entity (gnat_field, NULL_TREE, 0); - - /* If there are discriminants, the prefix might be - evaluated more than once, which is a problem if it has - side-effects. */ - - if (Has_Discriminants (Is_Access_Type (Etype (Prefix (gnat_node))) - ? Designated_Type (Etype - (Prefix (gnat_node))) - : Etype (Prefix (gnat_node))) - && TREE_SIDE_EFFECTS (gnu_prefix)) - gnu_prefix = make_save_expr (gnu_prefix); - - /* Emit discriminant check if necessary. */ - if (Do_Discriminant_Check (gnat_node)) - gnu_prefix = emit_discriminant_check (gnu_prefix, gnat_node); - gnu_result - = build_component_ref (gnu_prefix, NULL_TREE, gnu_field); - } - - if (gnu_result == 0) - gigi_abort (308); - - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - } - break; - - case N_Attribute_Reference: - { - /* The attribute designator (like an enumeration value). */ - int attribute = Get_Attribute_Id (Attribute_Name (gnat_node)); - int prefix_unused = 0; - tree gnu_prefix; - tree gnu_type; - - /* The Elab_Spec and Elab_Body attributes are special in that - Prefix is a unit, not an object with a GCC equivalent. Similarly - for Elaborated, since that variable isn't otherwise known. */ - if (attribute == Attr_Elab_Body || attribute == Attr_Elab_Spec) - { - gnu_prefix - = create_subprog_decl - (create_concat_name (Entity (Prefix (gnat_node)), - attribute == Attr_Elab_Body - ? "elabb" : "elabs"), - NULL_TREE, void_ftype, NULL_TREE, 0, 1, 1, 0); - return gnu_prefix; - } - - gnu_prefix = gnat_to_gnu (Prefix (gnat_node)); - gnu_type = TREE_TYPE (gnu_prefix); - - /* If the input is a NULL_EXPR, make a new one. */ - if (TREE_CODE (gnu_prefix) == NULL_EXPR) - { - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - gnu_result = build1 (NULL_EXPR, gnu_result_type, - TREE_OPERAND (gnu_prefix, 0)); - break; - } - - switch (attribute) - { - case Attr_Pos: - case Attr_Val: - /* These are just conversions until since representation - clauses for enumerations are handled in the front end. */ - { - int check_p = Do_Range_Check (First (Expressions (gnat_node))); - - gnu_result = gnat_to_gnu (First (Expressions (gnat_node))); - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - gnu_result = convert_with_check (Etype (gnat_node), gnu_result, - check_p, check_p, 1); - } - break; - - case Attr_Pred: - case Attr_Succ: - /* These just add or subject the constant 1. Representation - clauses for enumerations are handled in the front-end. */ - gnu_expr = gnat_to_gnu (First (Expressions (gnat_node))); - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - - if (Do_Range_Check (First (Expressions (gnat_node)))) - { - gnu_expr = make_save_expr (gnu_expr); - gnu_expr - = emit_check - (build_binary_op (EQ_EXPR, integer_type_node, - gnu_expr, - attribute == Attr_Pred - ? TYPE_MIN_VALUE (gnu_result_type) - : TYPE_MAX_VALUE (gnu_result_type)), - gnu_expr); - } - - gnu_result - = build_binary_op (attribute == Attr_Pred - ? MINUS_EXPR : PLUS_EXPR, - gnu_result_type, gnu_expr, - convert (gnu_result_type, integer_one_node)); - break; - - case Attr_Address: - case Attr_Unrestricted_Access: - - /* Conversions don't change something's address but can cause - us to miss the COMPONENT_REF case below, so strip them off. */ - gnu_prefix = remove_conversions (gnu_prefix); - - /* If we are taking 'Address of an unconstrained object, - this is the pointer to the underlying array. */ - gnu_prefix = maybe_unconstrained_array (gnu_prefix); - - /* ... fall through ... */ - - case Attr_Access: - case Attr_Unchecked_Access: - case Attr_Code_Address: - - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - gnu_result - = build_unary_op (attribute == Attr_Address - || attribute == Attr_Unrestricted_Access - ? ATTR_ADDR_EXPR : ADDR_EXPR, - gnu_result_type, gnu_prefix); - - /* For 'Code_Address, find an inner ADDR_EXPR and mark it - so that we don't try to build a trampoline. */ - if (attribute == Attr_Code_Address) - { - for (gnu_expr = gnu_result; - TREE_CODE (gnu_expr) == NOP_EXPR - || TREE_CODE (gnu_expr) == CONVERT_EXPR; - gnu_expr = TREE_OPERAND (gnu_expr, 0)) - TREE_CONSTANT (gnu_expr) = 1; - ; - - if (TREE_CODE (gnu_expr) == ADDR_EXPR) - TREE_STATIC (gnu_expr) = TREE_CONSTANT (gnu_expr) = 1; - } - - break; - - case Attr_Size: - case Attr_Object_Size: - case Attr_Value_Size: - case Attr_Max_Size_In_Storage_Elements: - - gnu_expr = gnu_prefix; - - /* Remove NOPS from gnu_expr and conversions from gnu_prefix. - We only use GNU_EXPR to see if a COMPONENT_REF was involved. */ - while (TREE_CODE (gnu_expr) == NOP_EXPR) - gnu_expr = TREE_OPERAND (gnu_expr, 0); - - gnu_prefix = remove_conversions (gnu_prefix); - prefix_unused = 1; - gnu_type = TREE_TYPE (gnu_prefix); - - /* Replace an unconstrained array type with the type of the - underlying array. We can't do this with a call to - maybe_unconstrained_array since we may have a TYPE_DECL. - For 'Max_Size_In_Storage_Elements, use the record type - that will be used to allocate the object and its template. */ - - if (TREE_CODE (gnu_type) == UNCONSTRAINED_ARRAY_TYPE) - { - gnu_type = TYPE_OBJECT_RECORD_TYPE (gnu_type); - if (attribute != Attr_Max_Size_In_Storage_Elements) - gnu_type = TREE_TYPE (TREE_CHAIN (TYPE_FIELDS (gnu_type))); - } - - /* If we are looking for the size of a field, return the - field size. Otherwise, if the prefix is an object, - or if 'Object_Size or 'Max_Size_In_Storage_Elements has - been specified, the result is the GCC size of the type. - Otherwise, the result is the RM_Size of the type. */ - if (TREE_CODE (gnu_prefix) == COMPONENT_REF) - gnu_result = DECL_SIZE (TREE_OPERAND (gnu_prefix, 1)); - else if (TREE_CODE (gnu_prefix) != TYPE_DECL - || attribute == Attr_Object_Size - || attribute == Attr_Max_Size_In_Storage_Elements) - { - /* If this is a padded type, the GCC size isn't relevant - to the programmer. Normally, what we want is the RM_Size, - which was set from the specified size, but if it was not - set, we want the size of the relevant field. Using the MAX - of those two produces the right result in all case. Don't - use the size of the field if it's a self-referential type, - since that's never what's wanted. */ - if (TREE_CODE (gnu_type) == RECORD_TYPE - && TYPE_IS_PADDING_P (gnu_type) - && TREE_CODE (gnu_expr) == COMPONENT_REF) - { - gnu_result = rm_size (gnu_type); - if (! (contains_placeholder_p - (DECL_SIZE (TREE_OPERAND (gnu_expr, 1))))) - gnu_result - = size_binop (MAX_EXPR, gnu_result, - DECL_SIZE (TREE_OPERAND (gnu_expr, 1))); - } - else - gnu_result = TYPE_SIZE (gnu_type); - } - else - gnu_result = rm_size (gnu_type); - - if (gnu_result == 0) - gigi_abort (325); - - /* Deal with a self-referential size by returning the maximum - size for a type and by qualifying the size with - the object for 'Size of an object. */ - - if (TREE_CODE (gnu_result) != INTEGER_CST - && contains_placeholder_p (gnu_result)) - { - if (TREE_CODE (gnu_prefix) != TYPE_DECL) - gnu_result = build (WITH_RECORD_EXPR, TREE_TYPE (gnu_result), - gnu_result, gnu_prefix); - else - gnu_result = max_size (gnu_result, 1); - } - - /* If the type contains a template, subtract the size of the - template. */ - if (TREE_CODE (gnu_type) == RECORD_TYPE - && TYPE_CONTAINS_TEMPLATE_P (gnu_type)) - gnu_result = size_binop (MINUS_EXPR, gnu_result, - DECL_SIZE (TYPE_FIELDS (gnu_type))); - - /* If the type contains a template, subtract the size of the - template. */ - if (TREE_CODE (gnu_type) == RECORD_TYPE - && TYPE_CONTAINS_TEMPLATE_P (gnu_type)) - gnu_result = size_binop (MINUS_EXPR, gnu_result, - DECL_SIZE (TYPE_FIELDS (gnu_type))); - - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - - /* Always perform division using unsigned arithmetic as the - size cannot be negative, but may be an overflowed positive - value. This provides correct results for sizes up to 512 MB. - ??? Size should be calculated in storage elements directly. */ - - if (attribute == Attr_Max_Size_In_Storage_Elements) - gnu_result = convert (sizetype, - fold (build (CEIL_DIV_EXPR, bitsizetype, - gnu_result, - bitsize_unit_node))); - break; - - case Attr_Alignment: - if (TREE_CODE (gnu_prefix) == COMPONENT_REF - && (TREE_CODE (TREE_TYPE (TREE_OPERAND (gnu_prefix, 0))) - == RECORD_TYPE) - && (TYPE_IS_PADDING_P - (TREE_TYPE (TREE_OPERAND (gnu_prefix, 0))))) - gnu_prefix = TREE_OPERAND (gnu_prefix, 0); - - gnu_type = TREE_TYPE (gnu_prefix); - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - prefix_unused = 1; - - if (TREE_CODE (gnu_prefix) == COMPONENT_REF) - gnu_result - = size_int (DECL_ALIGN (TREE_OPERAND (gnu_prefix, 1))); - else - gnu_result = size_int (TYPE_ALIGN (gnu_type) / BITS_PER_UNIT); - break; - - case Attr_First: - case Attr_Last: - case Attr_Range_Length: - prefix_unused = 1; - - if (INTEGRAL_TYPE_P (gnu_type) - || TREE_CODE (gnu_type) == REAL_TYPE) - { - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - - if (attribute == Attr_First) - gnu_result = TYPE_MIN_VALUE (gnu_type); - else if (attribute == Attr_Last) - gnu_result = TYPE_MAX_VALUE (gnu_type); - else - gnu_result - = build_binary_op - (MAX_EXPR, get_base_type (gnu_result_type), - build_binary_op - (PLUS_EXPR, get_base_type (gnu_result_type), - build_binary_op (MINUS_EXPR, - get_base_type (gnu_result_type), - convert (gnu_result_type, - TYPE_MAX_VALUE (gnu_type)), - convert (gnu_result_type, - TYPE_MIN_VALUE (gnu_type))), - convert (gnu_result_type, integer_one_node)), - convert (gnu_result_type, integer_zero_node)); - - break; - } - /* ... fall through ... */ - case Attr_Length: - { - int Dimension - = (Present (Expressions (gnat_node)) - ? UI_To_Int (Intval (First (Expressions (gnat_node)))) - : 1); - - /* Emit access check if necessary */ - if (Do_Access_Check (gnat_node)) - gnu_prefix = emit_access_check (gnu_prefix); - - /* Make sure any implicit dereference gets done. */ - gnu_prefix = maybe_implicit_deref (gnu_prefix); - gnu_prefix = maybe_unconstrained_array (gnu_prefix); - gnu_type = TREE_TYPE (gnu_prefix); - prefix_unused = 1; - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - - if (TYPE_CONVENTION_FORTRAN_P (gnu_type)) - { - int ndim; - tree gnu_type_temp; - - for (ndim = 1, gnu_type_temp = gnu_type; - TREE_CODE (TREE_TYPE (gnu_type_temp)) == ARRAY_TYPE - && TYPE_MULTI_ARRAY_P (TREE_TYPE (gnu_type_temp)); - ndim++, gnu_type_temp = TREE_TYPE (gnu_type_temp)) - ; - - Dimension = ndim + 1 - Dimension; - } - - for (; Dimension > 1; Dimension--) - gnu_type = TREE_TYPE (gnu_type); - - if (TREE_CODE (gnu_type) != ARRAY_TYPE) - gigi_abort (309); - - if (attribute == Attr_First) - gnu_result - = TYPE_MIN_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))); - else if (attribute == Attr_Last) - gnu_result - = TYPE_MAX_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))); - else - /* 'Length or 'Range_Length. */ - { - tree gnu_compute_type - = signed_or_unsigned_type - (0, get_base_type (gnu_result_type)); - - gnu_result - = build_binary_op - (MAX_EXPR, gnu_compute_type, - build_binary_op - (PLUS_EXPR, gnu_compute_type, - build_binary_op - (MINUS_EXPR, gnu_compute_type, - convert (gnu_compute_type, - TYPE_MAX_VALUE - (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type)))), - convert (gnu_compute_type, - TYPE_MIN_VALUE - (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))))), - convert (gnu_compute_type, integer_one_node)), - convert (gnu_compute_type, integer_zero_node)); - } - - /* If this has a PLACEHOLDER_EXPR, qualify it by the object - we are handling. Note that these attributes could not - have been used on an unconstrained array type. */ - if (TREE_CODE (gnu_result) != INTEGER_CST - && contains_placeholder_p (gnu_result)) - gnu_result = build (WITH_RECORD_EXPR, TREE_TYPE (gnu_result), - gnu_result, gnu_prefix); - - break; - } - - case Attr_Bit_Position: - case Attr_Position: - case Attr_First_Bit: - case Attr_Last_Bit: - case Attr_Bit: - { - HOST_WIDE_INT bitsize; - HOST_WIDE_INT bitpos; - tree gnu_offset; - tree gnu_field_bitpos; - tree gnu_field_offset; - tree gnu_inner; - enum machine_mode mode; - int unsignedp, volatilep; - - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - gnu_prefix = remove_conversions (gnu_prefix); - prefix_unused = 1; - - /* We can have 'Bit on any object, but if it isn't a - COMPONENT_REF, the result is zero. Do not allow - 'Bit on a bare component, though. */ - if (attribute == Attr_Bit - && TREE_CODE (gnu_prefix) != COMPONENT_REF - && TREE_CODE (gnu_prefix) != FIELD_DECL) - { - gnu_result = integer_zero_node; - break; - } - - else if (TREE_CODE (gnu_prefix) != COMPONENT_REF - && ! (attribute == Attr_Bit_Position - && TREE_CODE (gnu_prefix) == FIELD_DECL)) - gigi_abort (310); - - get_inner_reference (gnu_prefix, &bitsize, &bitpos, &gnu_offset, - &mode, &unsignedp, &volatilep); - - - if (TREE_CODE (gnu_prefix) == COMPONENT_REF) - { - gnu_field_bitpos - = bit_position (TREE_OPERAND (gnu_prefix, 1)); - gnu_field_offset - = byte_position (TREE_OPERAND (gnu_prefix, 1)); - - for (gnu_inner = TREE_OPERAND (gnu_prefix, 0); - TREE_CODE (gnu_inner) == COMPONENT_REF - && DECL_INTERNAL_P (TREE_OPERAND (gnu_inner, 1)); - gnu_inner = TREE_OPERAND (gnu_inner, 0)) - { - gnu_field_bitpos - = size_binop (PLUS_EXPR, gnu_field_bitpos, - bit_position (TREE_OPERAND (gnu_inner, - 1))); - gnu_field_offset - = size_binop (PLUS_EXPR, gnu_field_offset, - byte_position (TREE_OPERAND (gnu_inner, - 1))); - } - } - else if (TREE_CODE (gnu_prefix) == FIELD_DECL) - { - gnu_field_bitpos = bit_position (gnu_prefix); - gnu_field_offset = byte_position (gnu_prefix); - } - else - { - gnu_field_bitpos = bitsize_zero_node; - gnu_field_offset = size_zero_node; - } - - switch (attribute) - { - case Attr_Position: - gnu_result = gnu_field_offset; - break; - - - case Attr_First_Bit: - case Attr_Bit: - gnu_result = size_int (bitpos % BITS_PER_UNIT); - break; - - - case Attr_Last_Bit: - gnu_result = bitsize_int (bitpos % BITS_PER_UNIT); - gnu_result - = size_binop (PLUS_EXPR, gnu_result, - TYPE_SIZE (TREE_TYPE (gnu_prefix))); - gnu_result = size_binop (MINUS_EXPR, gnu_result, - bitsize_one_node); - break; - - case Attr_Bit_Position: - gnu_result = gnu_field_bitpos; - break; - } - - /* If this has a PLACEHOLDER_EXPR, qualify it by the object - we are handling. */ - if (TREE_CODE (gnu_result) != INTEGER_CST - && contains_placeholder_p (gnu_result)) - gnu_result = build (WITH_RECORD_EXPR, TREE_TYPE (gnu_result), - gnu_result, gnu_prefix); - - break; - } - - case Attr_Min: - case Attr_Max: - gnu_lhs = gnat_to_gnu (First (Expressions (gnat_node))); - gnu_rhs = gnat_to_gnu (Next (First (Expressions (gnat_node)))); - - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - gnu_result = build_binary_op (attribute == Attr_Min - ? MIN_EXPR : MAX_EXPR, - gnu_result_type, gnu_lhs, gnu_rhs); - break; - - case Attr_Passed_By_Reference: - gnu_result = size_int (default_pass_by_ref (gnu_type) - || must_pass_by_ref (gnu_type)); - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - break; - - case Attr_Component_Size: - if (TREE_CODE (gnu_prefix) == COMPONENT_REF - && (TREE_CODE (TREE_TYPE (TREE_OPERAND (gnu_prefix, 0))) - == RECORD_TYPE) - && (TYPE_IS_PADDING_P - (TREE_TYPE (TREE_OPERAND (gnu_prefix, 0))))) - gnu_prefix = TREE_OPERAND (gnu_prefix, 0); - - gnu_prefix = maybe_implicit_deref (gnu_prefix); - gnu_type = TREE_TYPE (gnu_prefix); - - if (TREE_CODE (gnu_type) == UNCONSTRAINED_ARRAY_TYPE) - gnu_type - = TREE_TYPE (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_type)))); - - while (TREE_CODE (TREE_TYPE (gnu_type)) == ARRAY_TYPE - && TYPE_MULTI_ARRAY_P (TREE_TYPE (gnu_type))) - gnu_type = TREE_TYPE (gnu_type); - - if (TREE_CODE (gnu_type) != ARRAY_TYPE) - gigi_abort (330); - - /* Note this size cannot be self-referential. */ - gnu_result = TYPE_SIZE (TREE_TYPE (gnu_type)); - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - prefix_unused = 1; - break; - - case Attr_Null_Parameter: - /* This is just a zero cast to the pointer type for - our prefix and dereferenced. */ - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - gnu_result - = build_unary_op (INDIRECT_REF, NULL_TREE, - convert (build_pointer_type (gnu_result_type), - integer_zero_node)); - TREE_PRIVATE (gnu_result) = 1; - break; - - case Attr_Mechanism_Code: - { - int code; - Entity_Id gnat_obj = Entity (Prefix (gnat_node)); - - prefix_unused = 1; - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - if (Present (Expressions (gnat_node))) - { - int i = UI_To_Int (Intval (First (Expressions (gnat_node)))); - - for (gnat_obj = First_Formal (gnat_obj); i > 1; - i--, gnat_obj = Next_Formal (gnat_obj)) - ; - } - - code = Mechanism (gnat_obj); - if (code == Default) - code = ((present_gnu_tree (gnat_obj) - && (DECL_BY_REF_P (get_gnu_tree (gnat_obj)) - || (DECL_BY_COMPONENT_PTR_P - (get_gnu_tree (gnat_obj))))) - ? By_Reference : By_Copy); - gnu_result = convert (gnu_result_type, size_int (- code)); - } - break; - - default: - /* Say we have an unimplemented attribute. Then set the - value to be returned to be a zero and hope that's something - we can convert to the type of this attribute. */ - - post_error ("unimplemented attribute", gnat_node); - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - gnu_result = integer_zero_node; - break; - } - - /* If this is an attribute where the prefix was unused, - force a use of it if it has a side-effect. */ - if (prefix_unused && TREE_SIDE_EFFECTS (gnu_prefix)) - gnu_result = fold (build (COMPOUND_EXPR, TREE_TYPE (gnu_result), - gnu_prefix, gnu_result)); - } - break; - - case N_Reference: - /* Like 'Access as far as we are concerned. */ - gnu_result = gnat_to_gnu (Prefix (gnat_node)); - gnu_result = build_unary_op (ADDR_EXPR, NULL_TREE, gnu_result); - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - break; - - case N_Aggregate: - case N_Extension_Aggregate: - { - tree gnu_aggr_type; - - /* ??? It is wrong to evaluate the type now, but there doesn't - seem to be any other practical way of doing it. */ - - gnu_aggr_type = gnu_result_type - = get_unpadded_type (Etype (gnat_node)); - - if (TREE_CODE (gnu_result_type) == RECORD_TYPE - && TYPE_CONTAINS_TEMPLATE_P (gnu_result_type)) - gnu_aggr_type - = TREE_TYPE (TREE_CHAIN (TYPE_FIELDS (gnu_result_type))); - - if (Null_Record_Present (gnat_node)) - gnu_result = build_constructor (gnu_aggr_type, NULL_TREE); - - else if (TREE_CODE (gnu_aggr_type) == RECORD_TYPE) - gnu_result - = assoc_to_constructor (First (Component_Associations (gnat_node)), - gnu_aggr_type); - else if (TREE_CODE (gnu_aggr_type) == UNION_TYPE) - { - /* The first element is the discrimant, which we ignore. The - next is the field we're building. Convert the expression - to the type of the field and then to the union type. */ - Node_Id gnat_assoc - = Next (First (Component_Associations (gnat_node))); - Entity_Id gnat_field = Entity (First (Choices (gnat_assoc))); - tree gnu_field_type - = TREE_TYPE (gnat_to_gnu_entity (gnat_field, NULL_TREE, 0)); - - gnu_result = convert (gnu_field_type, - gnat_to_gnu (Expression (gnat_assoc))); - } - else if (TREE_CODE (gnu_aggr_type) == ARRAY_TYPE) - gnu_result = pos_to_constructor (First (Expressions (gnat_node)), - gnu_aggr_type, - Component_Type (Etype (gnat_node))); - else if (TREE_CODE (gnu_aggr_type) == COMPLEX_TYPE) - gnu_result - = build_binary_op - (COMPLEX_EXPR, gnu_aggr_type, - gnat_to_gnu (Expression (First - (Component_Associations (gnat_node)))), - gnat_to_gnu (Expression - (Next - (First (Component_Associations (gnat_node)))))); - else - gigi_abort (312); - - gnu_result = convert (gnu_result_type, gnu_result); - } - break; - - case N_Null: - gnu_result = null_pointer_node; - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - break; - - case N_Type_Conversion: - case N_Qualified_Expression: - /* Get the operand expression. */ - gnu_result = gnat_to_gnu (Expression (gnat_node)); - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - - gnu_result - = convert_with_check (Etype (gnat_node), gnu_result, - Do_Overflow_Check (gnat_node), - Do_Range_Check (Expression (gnat_node)), - Nkind (gnat_node) == N_Type_Conversion - && Float_Truncate (gnat_node)); - break; - - case N_Unchecked_Type_Conversion: - gnu_result = gnat_to_gnu (Expression (gnat_node)); - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - - /* If the result is a pointer type, see if we are improperly - converting to a stricter alignment. */ - - if (STRICT_ALIGNMENT && POINTER_TYPE_P (gnu_result_type) - && IN (Ekind (Etype (gnat_node)), Access_Kind)) - { - unsigned int align = known_alignment (gnu_result); - tree gnu_obj_type = TREE_TYPE (gnu_result_type); - unsigned int oalign - = TREE_CODE (gnu_obj_type) == FUNCTION_TYPE - ? FUNCTION_BOUNDARY : TYPE_ALIGN (gnu_obj_type); - - if (align != 0 && align < oalign && ! TYPE_ALIGN_OK_P (gnu_obj_type)) - post_error_ne_tree_2 - ("?source alignment (^) < alignment of & (^)", - gnat_node, Designated_Type (Etype (gnat_node)), - size_int (align / BITS_PER_UNIT), oalign / BITS_PER_UNIT); - } - - gnu_result = unchecked_convert (gnu_result_type, gnu_result); - break; - - case N_In: - case N_Not_In: - { - tree gnu_object = gnat_to_gnu (Left_Opnd (gnat_node)); - Node_Id gnat_range = Right_Opnd (gnat_node); - tree gnu_low; - tree gnu_high; - - /* GNAT_RANGE is either an N_Range node or an identifier - denoting a subtype. */ - if (Nkind (gnat_range) == N_Range) - { - gnu_low = gnat_to_gnu (Low_Bound (gnat_range)); - gnu_high = gnat_to_gnu (High_Bound (gnat_range)); - } - else if (Nkind (gnat_range) == N_Identifier - || Nkind (gnat_range) == N_Expanded_Name) - { - tree gnu_range_type = get_unpadded_type (Entity (gnat_range)); - - gnu_low = TYPE_MIN_VALUE (gnu_range_type); - gnu_high = TYPE_MAX_VALUE (gnu_range_type); - } - else - gigi_abort (313); - - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - - /* If LOW and HIGH are identical, perform an equality test. - Otherwise, ensure that GNU_OBJECT is only evaluated once - and perform a full range test. */ - if (operand_equal_p (gnu_low, gnu_high, 0)) - gnu_result = build_binary_op (EQ_EXPR, gnu_result_type, - gnu_object, gnu_low); - else - { - gnu_object = make_save_expr (gnu_object); - gnu_result - = build_binary_op (TRUTH_ANDIF_EXPR, gnu_result_type, - build_binary_op (GE_EXPR, gnu_result_type, - gnu_object, gnu_low), - build_binary_op (LE_EXPR, gnu_result_type, - gnu_object, gnu_high)); - } - - if (Nkind (gnat_node) == N_Not_In) - gnu_result = invert_truthvalue (gnu_result); - } - break; - - case N_Op_Divide: - gnu_lhs = gnat_to_gnu (Left_Opnd (gnat_node)); - gnu_rhs = gnat_to_gnu (Right_Opnd (gnat_node)); - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - gnu_result = build_binary_op (FLOAT_TYPE_P (gnu_result_type) - ? RDIV_EXPR - : (Rounded_Result (gnat_node) - ? ROUND_DIV_EXPR : TRUNC_DIV_EXPR), - gnu_result_type, gnu_lhs, gnu_rhs); - break; - - case N_And_Then: case N_Or_Else: - { - enum tree_code code = gnu_codes[Nkind (gnat_node)]; - tree gnu_rhs_side; - - /* The elaboration of the RHS may generate code. If so, - we need to make sure it gets executed after the LHS. */ - gnu_lhs = gnat_to_gnu (Left_Opnd (gnat_node)); - clear_last_expr (); - gnu_rhs_side = expand_start_stmt_expr (/*has_scope=*/1); - gnu_rhs = gnat_to_gnu (Right_Opnd (gnat_node)); - expand_end_stmt_expr (gnu_rhs_side); - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - - if (RTL_EXPR_SEQUENCE (gnu_rhs_side) != 0) - gnu_rhs = build (COMPOUND_EXPR, gnu_result_type, gnu_rhs_side, - gnu_rhs); - - gnu_result = build_binary_op (code, gnu_result_type, gnu_lhs, gnu_rhs); - } - break; - - case N_Op_Or: case N_Op_And: case N_Op_Xor: - /* These can either be operations on booleans or on modular types. - Fall through for boolean types since that's the way GNU_CODES is - set up. */ - if (IN (Ekind (Underlying_Type (Etype (gnat_node))), - Modular_Integer_Kind)) - { - enum tree_code code - = (Nkind (gnat_node) == N_Op_Or ? BIT_IOR_EXPR - : Nkind (gnat_node) == N_Op_And ? BIT_AND_EXPR - : BIT_XOR_EXPR); - - gnu_lhs = gnat_to_gnu (Left_Opnd (gnat_node)); - gnu_rhs = gnat_to_gnu (Right_Opnd (gnat_node)); - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - gnu_result = build_binary_op (code, gnu_result_type, - gnu_lhs, gnu_rhs); - break; - } - - /* ... fall through ... */ - - case N_Op_Eq: case N_Op_Ne: case N_Op_Lt: - case N_Op_Le: case N_Op_Gt: case N_Op_Ge: - case N_Op_Add: case N_Op_Subtract: case N_Op_Multiply: - case N_Op_Mod: case N_Op_Rem: - case N_Op_Rotate_Left: - case N_Op_Rotate_Right: - case N_Op_Shift_Left: - case N_Op_Shift_Right: - case N_Op_Shift_Right_Arithmetic: - { - enum tree_code code = gnu_codes[Nkind (gnat_node)]; - tree gnu_type; - - gnu_lhs = gnat_to_gnu (Left_Opnd (gnat_node)); - gnu_rhs = gnat_to_gnu (Right_Opnd (gnat_node)); - gnu_type = gnu_result_type = get_unpadded_type (Etype (gnat_node)); - - /* If this is a comparison operator, convert any references to - an unconstrained array value into a reference to the - actual array. */ - if (TREE_CODE_CLASS (code) == '<') - { - gnu_lhs = maybe_unconstrained_array (gnu_lhs); - gnu_rhs = maybe_unconstrained_array (gnu_rhs); - } - - /* If the result type is a private type, its full view may be a - numeric subtype. The representation we need is that of its base - type, given that it is the result of an arithmetic operation. */ - else if (Is_Private_Type (Etype (gnat_node))) - gnu_type = gnu_result_type - = get_unpadded_type (Base_Type (Full_View (Etype (gnat_node)))); - - /* If this is a shift whose count is not guaranteed to be correct, - we need to adjust the shift count. */ - if (IN (Nkind (gnat_node), N_Op_Shift) - && ! Shift_Count_OK (gnat_node)) - { - tree gnu_count_type = get_base_type (TREE_TYPE (gnu_rhs)); - tree gnu_max_shift - = convert (gnu_count_type, TYPE_SIZE (gnu_type)); - - if (Nkind (gnat_node) == N_Op_Rotate_Left - || Nkind (gnat_node) == N_Op_Rotate_Right) - gnu_rhs = build_binary_op (TRUNC_MOD_EXPR, gnu_count_type, - gnu_rhs, gnu_max_shift); - else if (Nkind (gnat_node) == N_Op_Shift_Right_Arithmetic) - gnu_rhs - = build_binary_op - (MIN_EXPR, gnu_count_type, - build_binary_op (MINUS_EXPR, - gnu_count_type, - gnu_max_shift, - convert (gnu_count_type, - integer_one_node)), - gnu_rhs); - } - - /* For right shifts, the type says what kind of shift to do, - so we may need to choose a different type. */ - if (Nkind (gnat_node) == N_Op_Shift_Right - && ! TREE_UNSIGNED (gnu_type)) - gnu_type = unsigned_type (gnu_type); - else if (Nkind (gnat_node) == N_Op_Shift_Right_Arithmetic - && TREE_UNSIGNED (gnu_type)) - gnu_type = signed_type (gnu_type); - - if (gnu_type != gnu_result_type) - { - gnu_lhs = convert (gnu_type, gnu_lhs); - gnu_rhs = convert (gnu_type, gnu_rhs); - } - - gnu_result = build_binary_op (code, gnu_type, gnu_lhs, gnu_rhs); - - /* If this is a logical shift with the shift count not verified, - we must return zero if it is too large. We cannot compensate - above in this case. */ - if ((Nkind (gnat_node) == N_Op_Shift_Left - || Nkind (gnat_node) == N_Op_Shift_Right) - && ! Shift_Count_OK (gnat_node)) - gnu_result - = build_cond_expr - (gnu_type, - build_binary_op (GE_EXPR, integer_type_node, - gnu_rhs, - convert (TREE_TYPE (gnu_rhs), - TYPE_SIZE (gnu_type))), - convert (gnu_type, integer_zero_node), - gnu_result); - } - break; - - case N_Conditional_Expression: - { - tree gnu_cond = gnat_to_gnu (First (Expressions (gnat_node))); - tree gnu_true = gnat_to_gnu (Next (First (Expressions (gnat_node)))); - tree gnu_false - = gnat_to_gnu (Next (Next (First (Expressions (gnat_node))))); - - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - gnu_result = build_cond_expr (gnu_result_type, - truthvalue_conversion (gnu_cond), - gnu_true, gnu_false); - } - break; - - case N_Op_Plus: - gnu_result = gnat_to_gnu (Right_Opnd (gnat_node)); - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - break; - - case N_Op_Not: - /* This case can apply to a boolean or a modular type. - Fall through for a boolean operand since GNU_CODES is set - up to handle this. */ - if (IN (Ekind (Etype (gnat_node)), Modular_Integer_Kind)) - { - gnu_expr = gnat_to_gnu (Right_Opnd (gnat_node)); - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - gnu_result = build_unary_op (BIT_NOT_EXPR, gnu_result_type, - gnu_expr); - break; - } - - /* ... fall through ... */ - - case N_Op_Minus: case N_Op_Abs: - gnu_expr = gnat_to_gnu (Right_Opnd (gnat_node)); - - if (Ekind (Etype (gnat_node)) != E_Private_Type) - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - else - gnu_result_type = get_unpadded_type (Base_Type - (Full_View (Etype (gnat_node)))); - - gnu_result = build_unary_op (gnu_codes[Nkind (gnat_node)], - gnu_result_type, gnu_expr); - break; - - case N_Allocator: - { - tree gnu_init = 0; - tree gnu_type; - - gnat_temp = Expression (gnat_node); - - /* The Expression operand can either be an N_Identifier or - Expanded_Name, which must represent a type, or a - N_Qualified_Expression, which contains both the object type and an - initial value for the object. */ - if (Nkind (gnat_temp) == N_Identifier - || Nkind (gnat_temp) == N_Expanded_Name) - gnu_type = gnat_to_gnu_type (Entity (gnat_temp)); - else if (Nkind (gnat_temp) == N_Qualified_Expression) - { - Entity_Id gnat_desig_type - = Designated_Type (Underlying_Type (Etype (gnat_node))); - - gnu_init = gnat_to_gnu (Expression (gnat_temp)); - - gnu_init = maybe_unconstrained_array (gnu_init); - if (Do_Range_Check (Expression (gnat_temp))) - gnu_init = emit_range_check (gnu_init, gnat_desig_type); - - if (Is_Elementary_Type (gnat_desig_type) - || Is_Constrained (gnat_desig_type)) - { - gnu_type = gnat_to_gnu_type (gnat_desig_type); - gnu_init = convert (gnu_type, gnu_init); - } - else - { - gnu_type = gnat_to_gnu_type (Etype (Expression (gnat_temp))); - if (TREE_CODE (gnu_type) == UNCONSTRAINED_ARRAY_TYPE) - gnu_type = TREE_TYPE (gnu_init); - - gnu_init = convert (gnu_type, gnu_init); - } - } - else - gigi_abort (315); - - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - return build_allocator (gnu_type, gnu_init, gnu_result_type, - Procedure_To_Call (gnat_node), - Storage_Pool (gnat_node)); - } - break; - - /***************************/ - /* Chapter 5: Statements: */ - /***************************/ - - case N_Label: - if (! type_annotate_only) - { - tree gnu_label = gnat_to_gnu (Identifier (gnat_node)); - Node_Id gnat_parent = Parent (gnat_node); - - expand_label (gnu_label); - - /* If this is the first label of an exception handler, we must - mark that any CALL_INSN can jump to it. */ - if (Present (gnat_parent) - && Nkind (gnat_parent) == N_Exception_Handler - && First (Statements (gnat_parent)) == gnat_node) - nonlocal_goto_handler_labels - = gen_rtx_EXPR_LIST (VOIDmode, label_rtx (gnu_label), - nonlocal_goto_handler_labels); - } - break; - - case N_Null_Statement: - break; - - case N_Assignment_Statement: - if (type_annotate_only) - break; - - /* Get the LHS and RHS of the statement and convert any reference to an - unconstrained array into a reference to the underlying array. */ - gnu_lhs = maybe_unconstrained_array (gnat_to_gnu (Name (gnat_node))); - gnu_rhs - = maybe_unconstrained_array (gnat_to_gnu (Expression (gnat_node))); - - set_lineno (gnat_node, 1); - - /* If range check is needed, emit code to generate it */ - if (Do_Range_Check (Expression (gnat_node))) - gnu_rhs = emit_range_check (gnu_rhs, Etype (Name (gnat_node))); - - /* If either side's type has a size that overflows, convert this - into raise of Storage_Error: execution shouldn't have gotten - here anyway. */ - if ((TREE_CODE (TYPE_SIZE (TREE_TYPE (gnu_lhs))) == INTEGER_CST - && TREE_OVERFLOW (TYPE_SIZE (TREE_TYPE (gnu_lhs)))) - || (TREE_CODE (TYPE_SIZE (TREE_TYPE (gnu_rhs))) == INTEGER_CST - && TREE_OVERFLOW (TYPE_SIZE (TREE_TYPE (gnu_rhs))))) - expand_expr_stmt (build_call_raise (raise_storage_error_decl)); - else - expand_expr_stmt (build_binary_op (MODIFY_EXPR, NULL_TREE, - gnu_lhs, gnu_rhs)); - break; - - case N_If_Statement: - /* Start an IF statement giving the condition. */ - gnu_expr = gnat_to_gnu (Condition (gnat_node)); - set_lineno (gnat_node, 1); - expand_start_cond (gnu_expr, 0); - - /* Generate code for the statements to be executed if the condition - is true. */ - - for (gnat_temp = First (Then_Statements (gnat_node)); - Present (gnat_temp); - gnat_temp = Next (gnat_temp)) - gnat_to_code (gnat_temp); - - /* Generate each of the "else if" parts. */ - if (Present (Elsif_Parts (gnat_node))) - { - for (gnat_temp = First (Elsif_Parts (gnat_node)); - Present (gnat_temp); - gnat_temp = Next (gnat_temp)) - { - Node_Id gnat_statement; - - expand_start_else (); - - /* Set up the line numbers for each condition we test. */ - set_lineno (Condition (gnat_temp), 1); - expand_elseif (gnat_to_gnu (Condition (gnat_temp))); - - for (gnat_statement = First (Then_Statements (gnat_temp)); - Present (gnat_statement); - gnat_statement = Next (gnat_statement)) - gnat_to_code (gnat_statement); - } - } - - /* Finally, handle any statements in the "else" part. */ - if (Present (Else_Statements (gnat_node))) - { - expand_start_else (); - - for (gnat_temp = First (Else_Statements (gnat_node)); - Present (gnat_temp); - gnat_temp = Next (gnat_temp)) - gnat_to_code (gnat_temp); - } - - expand_end_cond (); - break; - - case N_Case_Statement: - { - Node_Id gnat_when; - Node_Id gnat_choice; - tree gnu_label; - Node_Id gnat_statement; - - gnu_expr = gnat_to_gnu (Expression (gnat_node)); - gnu_expr = convert (get_base_type (TREE_TYPE (gnu_expr)), gnu_expr); - - set_lineno (gnat_node, 1); - expand_start_case (1, gnu_expr, TREE_TYPE (gnu_expr), "case"); - - for (gnat_when = First_Non_Pragma (Alternatives (gnat_node)); - Present (gnat_when); - gnat_when = Next_Non_Pragma (gnat_when)) - { - /* First compile all the different case choices for the current - WHEN alternative. */ - - for (gnat_choice = First (Discrete_Choices (gnat_when)); - Present (gnat_choice); gnat_choice = Next (gnat_choice)) - { - int error_code; - - gnu_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE); - - set_lineno (gnat_choice, 1); - switch (Nkind (gnat_choice)) - { - case N_Range: - /* Abort on all errors except range empty, which - means we ignore this alternative. */ - error_code - = pushcase_range (gnat_to_gnu (Low_Bound (gnat_choice)), - gnat_to_gnu (High_Bound (gnat_choice)), - convert, gnu_label, 0); - - if (error_code != 0 && error_code != 4) - gigi_abort (332); - break; - - case N_Subtype_Indication: - error_code - = pushcase_range - (gnat_to_gnu (Low_Bound (Range_Expression - (Constraint (gnat_choice)))), - gnat_to_gnu (High_Bound (Range_Expression - (Constraint (gnat_choice)))), - convert, gnu_label, 0); - - if (error_code != 0 && error_code != 4) - gigi_abort (332); - break; - - case N_Identifier: - case N_Expanded_Name: - /* This represents either a subtype range or a static value - of some kind; Ekind says which. If a static value, - fall through to the next case. */ - if (IN (Ekind (Entity (gnat_choice)), Type_Kind)) - { - tree type = get_unpadded_type (Entity (gnat_choice)); - - error_code - = pushcase_range (fold (TYPE_MIN_VALUE (type)), - fold (TYPE_MAX_VALUE (type)), - convert, gnu_label, 0); - - if (error_code != 0 && error_code != 4) - gigi_abort (332); - break; - } - /* ... fall through ... */ - case N_Character_Literal: - case N_Integer_Literal: - if (pushcase (gnat_to_gnu (gnat_choice), convert, - gnu_label, 0)) - gigi_abort (332); - break; - - case N_Others_Choice: - if (pushcase (NULL_TREE, convert, gnu_label, 0)) - gigi_abort (332); - break; - - default: - gigi_abort (316); - } - } - - /* After compiling the choices attached to the WHEN compile the - body of statements that have to be executed, should the - "WHEN ... =>" be taken. */ - for (gnat_statement = First (Statements (gnat_when)); - Present (gnat_statement); - gnat_statement = Next (gnat_statement)) - gnat_to_code (gnat_statement); - - /* Communicate to GCC that we are done with the current WHEN, - i.e. insert a "break" statement. */ - expand_exit_something (); - } - - expand_end_case (gnu_expr); - } - break; - - case N_Loop_Statement: - { - /* The loop variable in GCC form, if any. */ - tree gnu_loop_var = NULL_TREE; - /* PREINCREMENT_EXPR or PREDECREMENT_EXPR. */ - enum tree_code gnu_update = ERROR_MARK; - /* Used if this is a named loop for so EXIT can work. */ - struct nesting *loop_id; - /* Condition to continue loop tested at top of loop. */ - tree gnu_top_condition = integer_one_node; - /* Similar, but tested at bottom of loop. */ - tree gnu_bottom_condition = integer_one_node; - Node_Id gnat_statement; - Node_Id gnat_iter_scheme = Iteration_Scheme (gnat_node); - Node_Id gnat_top_condition = Empty; - int enclosing_if_p = 0; - - /* Set the condition that under which the loop should continue. - For "LOOP .... END LOOP;" the condition is always true. */ - if (No (gnat_iter_scheme)) - ; - /* The case "WHILE condition LOOP ..... END LOOP;" */ - else if (Present (Condition (gnat_iter_scheme))) - gnat_top_condition = Condition (gnat_iter_scheme); - else - { - /* We have an iteration scheme. */ - Node_Id gnat_loop_spec - = Loop_Parameter_Specification (gnat_iter_scheme); - Entity_Id gnat_loop_var = Defining_Entity (gnat_loop_spec); - Entity_Id gnat_type = Etype (gnat_loop_var); - tree gnu_type = get_unpadded_type (gnat_type); - tree gnu_low = TYPE_MIN_VALUE (gnu_type); - tree gnu_high = TYPE_MAX_VALUE (gnu_type); - int reversep = Reverse_Present (gnat_loop_spec); - tree gnu_first = reversep ? gnu_high : gnu_low; - tree gnu_last = reversep ? gnu_low : gnu_high; - enum tree_code end_code = reversep ? GE_EXPR : LE_EXPR; - tree gnu_base_type = get_base_type (gnu_type); - tree gnu_limit - = (reversep ? TYPE_MIN_VALUE (gnu_base_type) - : TYPE_MAX_VALUE (gnu_base_type)); - - /* We know the loop variable will not overflow if GNU_LAST is - a constant and is not equal to GNU_LIMIT. If it might - overflow, we have to move the limit test to the end of - the loop. In that case, we have to test for an - empty loop outside the loop. */ - if (TREE_CODE (gnu_last) != INTEGER_CST - || TREE_CODE (gnu_limit) != INTEGER_CST - || tree_int_cst_equal (gnu_last, gnu_limit)) - { - gnu_expr = build_binary_op (LE_EXPR, integer_type_node, - gnu_low, gnu_high); - set_lineno (gnat_loop_spec, 1); - expand_start_cond (gnu_expr, 0); - enclosing_if_p = 1; - } - - /* Open a new nesting level that will surround the loop to declare - the loop index variable. */ - pushlevel (0); - expand_start_bindings (0); - - /* Declare the loop index and set it to its initial value. */ - gnu_loop_var = gnat_to_gnu_entity (gnat_loop_var, gnu_first, 1); - if (DECL_BY_REF_P (gnu_loop_var)) - gnu_loop_var = build_unary_op (INDIRECT_REF, NULL_TREE, - gnu_loop_var); - - /* The loop variable might be a padded type, so use `convert' to - get a reference to the inner variable if so. */ - gnu_loop_var = convert (get_base_type (gnu_type), gnu_loop_var); - - /* Set either the top or bottom exit condition as - appropriate depending on whether we know an overflow - cannot occur or not. */ - if (enclosing_if_p) - gnu_bottom_condition - = build_binary_op (NE_EXPR, integer_type_node, - gnu_loop_var, gnu_last); - else - gnu_top_condition - = build_binary_op (end_code, integer_type_node, - gnu_loop_var, gnu_last); - - gnu_update = reversep ? PREDECREMENT_EXPR : PREINCREMENT_EXPR; - } - - set_lineno (gnat_node, 1); - if (gnu_loop_var) - loop_id = expand_start_loop_continue_elsewhere (1); - else - loop_id = expand_start_loop (1); - - /* If the loop was named, have the name point to this loop. In this - case, the association is not a ..._DECL node; in fact, it isn't - a GCC tree node at all. Since this name is referenced inside - the loop, do it before we process the statements of the loop. */ - if (Present (Identifier (gnat_node))) - { - tree gnu_loop_id = make_node (GNAT_LOOP_ID); - - TREE_LOOP_ID (gnu_loop_id) = (rtx) loop_id; - save_gnu_tree (Entity (Identifier (gnat_node)), gnu_loop_id, 1); - } - - set_lineno (gnat_node, 1); - - /* We must evaluate the condition after we've entered the - loop so that any expression actions get done in the right - place. */ - if (Present (gnat_top_condition)) - gnu_top_condition = gnat_to_gnu (gnat_top_condition); - - expand_exit_loop_top_cond (0, gnu_top_condition); - - /* Make the loop body into its own block, so any allocated - storage will be released every iteration. This is needed - for stack allocation. */ - - pushlevel (0); - gnu_block_stack - = tree_cons (gnu_bottom_condition, NULL_TREE, gnu_block_stack); - expand_start_bindings (0); - - for (gnat_statement = First (Statements (gnat_node)); - Present (gnat_statement); - gnat_statement = Next (gnat_statement)) - gnat_to_code (gnat_statement); - - expand_end_bindings (getdecls (), kept_level_p (), 0); - poplevel (kept_level_p (), 1, 0); - gnu_block_stack = TREE_CHAIN (gnu_block_stack); - - set_lineno (gnat_node, 1); - expand_exit_loop_if_false (0, gnu_bottom_condition); - - if (gnu_loop_var) - { - expand_loop_continue_here (); - gnu_expr = build_binary_op (gnu_update, TREE_TYPE (gnu_loop_var), - gnu_loop_var, - convert (TREE_TYPE (gnu_loop_var), - integer_one_node)); - set_lineno (gnat_iter_scheme, 1); - expand_expr_stmt (gnu_expr); - } - - set_lineno (gnat_node, 1); - expand_end_loop (); - - if (gnu_loop_var) - { - /* Close the nesting level that sourround the loop that was used to - declare the loop index variable. */ - set_lineno (gnat_node, 1); - expand_end_bindings (getdecls (), 1, 0); - poplevel (1, 1, 0); - } - - if (enclosing_if_p) - { - set_lineno (gnat_node, 1); - expand_end_cond (); - } - } - break; - - case N_Block_Statement: - pushlevel (0); - gnu_block_stack = tree_cons (NULL_TREE, NULL_TREE, gnu_block_stack); - expand_start_bindings (0); - process_decls (Declarations (gnat_node), Empty, Empty, 1, 1); - gnat_to_code (Handled_Statement_Sequence (gnat_node)); - expand_end_bindings (getdecls (), kept_level_p (), 0); - poplevel (kept_level_p (), 1, 0); - gnu_block_stack = TREE_CHAIN (gnu_block_stack); - if (Present (Identifier (gnat_node))) - mark_out_of_scope (Entity (Identifier (gnat_node))); - break; - - case N_Exit_Statement: - { - /* Which loop to exit, NULL if the current loop. */ - struct nesting *loop_id = 0; - /* The GCC version of the optional GNAT condition node attached to the - exit statement. Exit the loop if this is false. */ - tree gnu_cond = integer_zero_node; - - if (Present (Name (gnat_node))) - loop_id - = (struct nesting *) - TREE_LOOP_ID (get_gnu_tree (Entity (Name (gnat_node)))); - - if (Present (Condition (gnat_node))) - gnu_cond - = invert_truthvalue - (truthvalue_conversion (gnat_to_gnu (Condition (gnat_node)))); - - set_lineno (gnat_node, 1); - expand_exit_loop_if_false (loop_id, gnu_cond); - } - break; - - case N_Return_Statement: - if (type_annotate_only) - break; - - { - /* The gnu function type of the subprogram currently processed. */ - tree gnu_subprog_type = TREE_TYPE (current_function_decl); - /* The return value from the subprogram. */ - tree gnu_ret_val = 0; - - /* If we are dealing with a "return;" from an Ada procedure with - parameters passed by copy in copy out, we need to return a record - containing the final values of these parameters. If the list - contains only one entry, return just that entry. - - For a full description of the copy in copy out parameter mechanism, - see the part of the gnat_to_gnu_entity routine dealing with the - translation of subprograms. - - But if we have a return label defined, convert this into - a branch to that label. */ - - if (TREE_VALUE (gnu_return_label_stack) != 0) - expand_goto (TREE_VALUE (gnu_return_label_stack)); - - else if (TYPE_CI_CO_LIST (gnu_subprog_type) != NULL_TREE) - { - if (list_length (TYPE_CI_CO_LIST (gnu_subprog_type)) == 1) - gnu_ret_val = TREE_VALUE (TYPE_CI_CO_LIST (gnu_subprog_type)); - else - gnu_ret_val - = build_constructor (TREE_TYPE (gnu_subprog_type), - TYPE_CI_CO_LIST (gnu_subprog_type)); - } - - /* If the Ada subprogram is a function, we just need to return the - expression. If the subprogram returns an unconstrained - array, we have to allocate a new version of the result and - return it. If we return by reference, return a pointer. */ - - else if (Present (Expression (gnat_node))) - { - gnu_ret_val = gnat_to_gnu (Expression (gnat_node)); - - /* Do not remove the padding from GNU_RET_VAL if the inner - type is self-referential since we want to allocate the fixed - size in that case. */ - if (TREE_CODE (gnu_ret_val) == COMPONENT_REF - && (TYPE_IS_PADDING_P - (TREE_TYPE (TREE_OPERAND (gnu_ret_val, 0)))) - && contains_placeholder_p - (TYPE_SIZE (TREE_TYPE (gnu_ret_val)))) - gnu_ret_val = TREE_OPERAND (gnu_ret_val, 0); - - if (TYPE_RETURNS_BY_REF_P (gnu_subprog_type) - || By_Ref (gnat_node)) - gnu_ret_val = build_unary_op (ADDR_EXPR, NULL_TREE, gnu_ret_val); - - else if (TYPE_RETURNS_UNCONSTRAINED_P (gnu_subprog_type)) - { - gnu_ret_val = maybe_unconstrained_array (gnu_ret_val); - - /* We have two cases: either the function returns with - depressed stack or not. If not, we allocate on the - secondary stack. If so, we allocate in the stack frame. - if no copy is needed, the front end will set By_Ref, - which we handle in the case above. */ - if (TYPE_RETURNS_STACK_DEPRESSED (gnu_subprog_type)) - gnu_ret_val - = build_allocator (TREE_TYPE (gnu_ret_val), gnu_ret_val, - TREE_TYPE (gnu_subprog_type), 0, -1); - else - gnu_ret_val - = build_allocator (TREE_TYPE (gnu_ret_val), gnu_ret_val, - TREE_TYPE (gnu_subprog_type), - Procedure_To_Call (gnat_node), - Storage_Pool (gnat_node)); - } - } - - set_lineno (gnat_node, 1); - if (gnu_ret_val) - expand_return (build_binary_op (MODIFY_EXPR, NULL_TREE, - DECL_RESULT (current_function_decl), - gnu_ret_val)); - else - expand_null_return (); - - } - break; - - case N_Goto_Statement: - if (type_annotate_only) - break; - - gnu_expr = gnat_to_gnu (Name (gnat_node)); - TREE_USED (gnu_expr) = 1; - set_lineno (gnat_node, 1); - expand_goto (gnu_expr); - break; - - /****************************/ - /* Chapter 6: Subprograms: */ - /****************************/ - - case N_Subprogram_Declaration: - /* Unless there is a freeze node, declare the subprogram. We consider - this a "definition" even though we're not generating code for - the subprogram because we will be making the corresponding GCC - node here. */ - - if (No (Freeze_Node (Defining_Entity (Specification (gnat_node))))) - gnat_to_gnu_entity (Defining_Entity (Specification (gnat_node)), - NULL_TREE, 1); - - break; - - case N_Abstract_Subprogram_Declaration: - /* This subprogram doesn't exist for code generation purposes, but we - have to elaborate the types of any parameters, unless they are - imported types (nothing to generate in this case). */ - for (gnat_temp - = First_Formal (Defining_Entity (Specification (gnat_node))); - Present (gnat_temp); - gnat_temp = Next_Formal_With_Extras (gnat_temp)) - if (Is_Itype (Etype (gnat_temp)) - && !From_With_Type (Etype (gnat_temp))) - gnat_to_gnu_entity (Etype (gnat_temp), NULL_TREE, 0); - - break; - - case N_Defining_Program_Unit_Name: - /* For a child unit identifier go up a level to get the - specificaton. We get this when we try to find the spec of - a child unit package that is the compilation unit being compiled. */ - gnat_to_code (Parent (gnat_node)); - break; - - case N_Subprogram_Body: - { - /* Save debug output mode in case it is reset. */ - enum debug_info_type save_write_symbols = write_symbols; - struct gcc_debug_hooks *save_debug_hooks = debug_hooks; - /* Definining identifier of a parameter to the subprogram. */ - Entity_Id gnat_param; - /* The defining identifier for the subprogram body. Note that if a - specification has appeared before for this body, then the identifier - occurring in that specification will also be a defining identifier - and all the calls to this subprogram will point to that - specification. */ - Entity_Id gnat_subprog_id - = (Present (Corresponding_Spec (gnat_node)) - ? Corresponding_Spec (gnat_node) : Defining_Entity (gnat_node)); - - /* The FUNCTION_DECL node corresponding to the subprogram spec. */ - tree gnu_subprog_decl; - /* The FUNCTION_TYPE node corresponding to the subprogram spec. */ - tree gnu_subprog_type; - tree gnu_cico_list; - - /* If this is a generic object or if it has been eliminated, - ignore it. */ - - if (Ekind (gnat_subprog_id) == E_Generic_Procedure - || Ekind (gnat_subprog_id) == E_Generic_Function - || Is_Eliminated (gnat_subprog_id)) - break; - - /* If debug information is suppressed for the subprogram, - turn debug mode off for the duration of processing. */ - if (Debug_Info_Off (gnat_subprog_id)) - { - write_symbols = NO_DEBUG; - debug_hooks = &do_nothing_debug_hooks; - } - - /* If this subprogram acts as its own spec, define it. Otherwise, - just get the already-elaborated tree node. However, if this - subprogram had its elaboration deferred, we will already have - made a tree node for it. So treat it as not being defined in - that case. Such a subprogram cannot have an address clause or - a freeze node, so this test is safe, though it does disable - some otherwise-useful error checking. */ - gnu_subprog_decl - = gnat_to_gnu_entity (gnat_subprog_id, NULL_TREE, - Acts_As_Spec (gnat_node) - && ! present_gnu_tree (gnat_subprog_id)); - - gnu_subprog_type = TREE_TYPE (gnu_subprog_decl); - - /* Set the line number in the decl to correspond to that of - the body so that the line number notes are written - correctly. */ - set_lineno (gnat_node, 0); - DECL_SOURCE_FILE (gnu_subprog_decl) = input_filename; - DECL_SOURCE_LINE (gnu_subprog_decl) = lineno; - - begin_subprog_body (gnu_subprog_decl); - set_lineno (gnat_node, 1); - - pushlevel (0); - gnu_block_stack = tree_cons (NULL_TREE, NULL_TREE, gnu_block_stack); - expand_start_bindings (0); - - gnu_cico_list = TYPE_CI_CO_LIST (gnu_subprog_type); - - /* If there are OUT parameters, we need to ensure that the - return statement properly copies them out. We do this by - making a new block and converting any inner return into a goto - to a label at the end of the block. */ - - if (gnu_cico_list != 0) - { - gnu_return_label_stack - = tree_cons (NULL_TREE, - build_decl (LABEL_DECL, NULL_TREE, NULL_TREE), - gnu_return_label_stack); - pushlevel (0); - expand_start_bindings (0); - } - else - gnu_return_label_stack - = tree_cons (NULL_TREE, NULL_TREE, gnu_return_label_stack); - - /* See if there are any parameters for which we don't yet have - GCC entities. These must be for OUT parameters for which we - will be making VAR_DECL nodes here. Fill them in to - TYPE_CI_CO_LIST, which must contain the empty entry as well. - We can match up the entries because TYPE_CI_CO_LIST is in the - order of the parameters. */ - - for (gnat_param = First_Formal (gnat_subprog_id); - Present (gnat_param); - gnat_param = Next_Formal_With_Extras (gnat_param)) - if (present_gnu_tree (gnat_param)) - adjust_decl_rtl (get_gnu_tree (gnat_param)); - else - { - /* Skip any entries that have been already filled in; they - must correspond to IN OUT parameters. */ - for (; gnu_cico_list != 0 && TREE_VALUE (gnu_cico_list) != 0; - gnu_cico_list = TREE_CHAIN (gnu_cico_list)) - ; - - /* Do any needed references for padded types. */ - TREE_VALUE (gnu_cico_list) - = convert (TREE_TYPE (TREE_PURPOSE (gnu_cico_list)), - gnat_to_gnu_entity (gnat_param, NULL_TREE, 1)); - } - - process_decls (Declarations (gnat_node), Empty, Empty, 1, 1); - - /* Generate the code of the subprogram itself. A return statement - will be present and any OUT parameters will be handled there. */ - gnat_to_code (Handled_Statement_Sequence (gnat_node)); - - expand_end_bindings (getdecls (), kept_level_p (), 0); - poplevel (kept_level_p (), 1, 0); - gnu_block_stack = TREE_CHAIN (gnu_block_stack); - - if (TREE_VALUE (gnu_return_label_stack) != 0) - { - tree gnu_retval; - - expand_end_bindings (NULL_TREE, kept_level_p (), 0); - poplevel (kept_level_p (), 1, 0); - expand_label (TREE_VALUE (gnu_return_label_stack)); - - gnu_cico_list = TYPE_CI_CO_LIST (gnu_subprog_type); - set_lineno (gnat_node, 1); - if (list_length (gnu_cico_list) == 1) - gnu_retval = TREE_VALUE (gnu_cico_list); - else - gnu_retval = build_constructor (TREE_TYPE (gnu_subprog_type), - gnu_cico_list); - - if (DECL_P (gnu_retval) && DECL_BY_REF_P (gnu_retval)) - gnu_retval - = build_unary_op (INDIRECT_REF, NULL_TREE, gnu_retval); - - expand_return - (build_binary_op (MODIFY_EXPR, NULL_TREE, - DECL_RESULT (current_function_decl), - gnu_retval)); - - } - - gnu_return_label_stack = TREE_CHAIN (gnu_return_label_stack); - - /* Disconnect the trees for parameters that we made variables for - from the GNAT entities since these will become unusable after - we end the function. */ - for (gnat_param = First_Formal (gnat_subprog_id); - Present (gnat_param); - gnat_param = Next_Formal_With_Extras (gnat_param)) - if (TREE_CODE (get_gnu_tree (gnat_param)) == VAR_DECL) - save_gnu_tree (gnat_param, NULL_TREE, 0); - - end_subprog_body (); - mark_out_of_scope (Defining_Unit_Name (Specification (gnat_node))); - write_symbols = save_write_symbols; - debug_hooks = save_debug_hooks; - } - break; - - case N_Function_Call: - case N_Procedure_Call_Statement: - - if (type_annotate_only) - break; - - { - /* The GCC node corresponding to the GNAT subprogram name. This can - either be a FUNCTION_DECL node if we are dealing with a standard - subprogram call, or an indirect reference expression (an - INDIRECT_REF node) pointing to a subprogram. */ - tree gnu_subprog_node = gnat_to_gnu (Name (gnat_node)); - /* The FUNCTION_TYPE node giving the GCC type of the subprogram. */ - tree gnu_subprog_type = TREE_TYPE (gnu_subprog_node); - tree gnu_subprog_addr - = build_unary_op (ADDR_EXPR, NULL_TREE, gnu_subprog_node); - Entity_Id gnat_formal; - Node_Id gnat_actual; - tree gnu_actual_list = NULL_TREE; - tree gnu_name_list = NULL_TREE; - tree gnu_after_list = NULL_TREE; - tree gnu_subprog_call; - - switch (Nkind (Name (gnat_node))) - { - case N_Identifier: - case N_Operator_Symbol: - case N_Expanded_Name: - case N_Attribute_Reference: - if (Is_Eliminated (Entity (Name (gnat_node)))) - post_error_ne ("cannot call eliminated subprogram &!", - gnat_node, Entity (Name (gnat_node))); - } - - if (TREE_CODE (gnu_subprog_type) != FUNCTION_TYPE) - gigi_abort (317); - - /* If we are calling a stubbed function, make this into a - raise of Program_Error. Elaborate all our args first. */ - - if (TREE_CODE (gnu_subprog_node) == FUNCTION_DECL - && DECL_STUBBED_P (gnu_subprog_node)) - { - for (gnat_actual = First_Actual (gnat_node); - Present (gnat_actual); - gnat_actual = Next_Actual (gnat_actual)) - expand_expr_stmt (gnat_to_gnu (gnat_actual)); - - if (Nkind (gnat_node) == N_Function_Call) - { - gnu_result_type = TREE_TYPE (gnu_subprog_type); - gnu_result - = build1 (NULL_EXPR, gnu_result_type, - build_call_raise (raise_program_error_decl)); - } - else - expand_expr_stmt (build_call_raise (raise_program_error_decl)); - break; - } - - /* The only way we can be making a call via an access type is - if Name is an explicit dereference. In that case, get the - list of formal args from the type the access type is pointing - to. Otherwise, get the formals from entity being called. */ - if (Nkind (Name (gnat_node)) == N_Explicit_Dereference) - gnat_formal = First_Formal (Etype (Name (gnat_node))); - else if (Nkind (Name (gnat_node)) == N_Attribute_Reference) - /* Assume here that this must be 'Elab_Body or 'Elab_Spec. */ - gnat_formal = 0; - else - gnat_formal = First_Formal (Entity (Name (gnat_node))); - - /* Create the list of the actual parameters as GCC expects it, namely - a chain of TREE_LIST nodes in which the TREE_VALUE field of each - node is a parameter-expression and the TREE_PURPOSE field is - null. Skip OUT parameters that are not passed by reference. */ - - for (gnat_actual = First_Actual (gnat_node); - Present (gnat_actual); - gnat_formal = Next_Formal_With_Extras (gnat_formal), - gnat_actual = Next_Actual (gnat_actual)) - { - tree gnu_formal_type = gnat_to_gnu_type (Etype (gnat_formal)); - Node_Id gnat_name - = ((Nkind (gnat_actual) == N_Unchecked_Type_Conversion) - ? Expression (gnat_actual) : gnat_actual); - tree gnu_name = gnat_to_gnu (gnat_name); - tree gnu_name_type = gnat_to_gnu_type (Etype (gnat_name)); - tree gnu_actual; - - /* If it's possible we may need to use this expression twice, - make sure than any side-effects are handled via SAVE_EXPRs. - Likewise if we need to force side-effects before the call. - ??? This is more conservative than we need since we don't - need to do this for pass-by-ref with no conversion. - If we are passing a non-addressable Out or In Out parameter by - reference, pass the address of a copy and set up to copy back - out after the call. */ - - if (Ekind (gnat_formal) != E_In_Parameter) - { - gnu_name = gnat_stabilize_reference (gnu_name, 1); - if (! addressable_p (gnu_name) - && present_gnu_tree (gnat_formal) - && (DECL_BY_REF_P (get_gnu_tree (gnat_formal)) - || DECL_BY_COMPONENT_PTR_P (get_gnu_tree (gnat_formal)) - || DECL_BY_DESCRIPTOR_P (get_gnu_tree (gnat_formal)))) - { - tree gnu_copy = gnu_name; - - /* Remove any unpadding on the actual and make a copy. - But if the actual is a left-justified modular type, - first convert to it. */ - if (TREE_CODE (gnu_name) == COMPONENT_REF - && (TYPE_IS_PADDING_P - (TREE_TYPE (TREE_OPERAND (gnu_name, 0))))) - gnu_name = gnu_copy = TREE_OPERAND (gnu_name, 0); - else if (TREE_CODE (gnu_name_type) == RECORD_TYPE - && (TYPE_LEFT_JUSTIFIED_MODULAR_P - (gnu_name_type))) - gnu_name = convert (gnu_name_type, gnu_name); - - gnu_actual = save_expr (gnu_name); - - /* Set up to move the copy back to the original. */ - gnu_after_list = tree_cons (gnu_copy, gnu_actual, - gnu_after_list); - - gnu_name = gnu_actual; - } - } - - /* If this was a procedure call, we may not have removed any - padding. So do it here for the part we will use as an - input, if any. */ - gnu_actual = gnu_name; - if (Ekind (gnat_formal) != E_Out_Parameter - && TREE_CODE (TREE_TYPE (gnu_actual)) == RECORD_TYPE - && TYPE_IS_PADDING_P (TREE_TYPE (gnu_actual))) - gnu_actual = convert (get_unpadded_type (Etype (gnat_actual)), - gnu_actual); - - if (Ekind (gnat_formal) != E_Out_Parameter - && Nkind (gnat_actual) != N_Unchecked_Type_Conversion - && Do_Range_Check (gnat_actual)) - gnu_actual = emit_range_check (gnu_actual, Etype (gnat_formal)); - - /* Do any needed conversions. We need only check for - unchecked conversion since normal conversions will be handled - by just converting to the formal type. */ - if (Nkind (gnat_actual) == N_Unchecked_Type_Conversion) - { - gnu_actual - = unchecked_convert (gnat_to_gnu_type (Etype (gnat_actual)), - gnu_actual); - - /* One we've done the unchecked conversion, we still - must ensure that the object is in range of the formal's - type. */ - if (Ekind (gnat_formal) != E_Out_Parameter - && Do_Range_Check (gnat_actual)) - gnu_actual = emit_range_check (gnu_actual, - Etype (gnat_formal)); - } - else - /* We may have suppressed a conversion to the Etype of the - actual since the parent is a procedure call. So add the - conversion here. */ - gnu_actual = convert (gnat_to_gnu_type (Etype (gnat_actual)), - gnu_actual); - - gnu_actual = convert (gnu_formal_type, gnu_actual); - - /* If we have not saved a GCC object for the formal, it means - it is an OUT parameter not passed by reference. Otherwise, - look at the PARM_DECL to see if it is passed by reference. */ - if (present_gnu_tree (gnat_formal) - && TREE_CODE (get_gnu_tree (gnat_formal)) == PARM_DECL - && DECL_BY_REF_P (get_gnu_tree (gnat_formal))) - { - if (Ekind (gnat_formal) != E_In_Parameter) - { - gnu_actual = gnu_name; - - /* If we have a padded type, be sure we've removed the - padding. */ - if (TREE_CODE (TREE_TYPE (gnu_actual)) == RECORD_TYPE - && TYPE_IS_PADDING_P (TREE_TYPE (gnu_actual))) - gnu_actual - = convert (get_unpadded_type (Etype (gnat_actual)), - gnu_actual); - } - - /* The symmetry of the paths to the type of an entity is - broken here since arguments don't know that they will - be passed by ref. */ - gnu_formal_type = TREE_TYPE (get_gnu_tree (gnat_formal)); - gnu_actual = build_unary_op (ADDR_EXPR, gnu_formal_type, - gnu_actual); - } - else if (present_gnu_tree (gnat_formal) - && TREE_CODE (get_gnu_tree (gnat_formal)) == PARM_DECL - && DECL_BY_COMPONENT_PTR_P (get_gnu_tree (gnat_formal))) - { - gnu_formal_type = TREE_TYPE (get_gnu_tree (gnat_formal)); - gnu_actual = maybe_implicit_deref (gnu_actual); - gnu_actual = maybe_unconstrained_array (gnu_actual); - - if (TREE_CODE (gnu_formal_type) == RECORD_TYPE - && TYPE_IS_PADDING_P (gnu_formal_type)) - { - gnu_formal_type - = TREE_TYPE (TYPE_FIELDS (gnu_formal_type)); - gnu_actual = convert (gnu_formal_type, gnu_actual); - } - - /* Take the address of the object and convert to the - proper pointer type. We'd like to actually compute - the address of the beginning of the array using - an ADDR_EXPR of an ARRAY_REF, but there's a possibility - that the ARRAY_REF might return a constant and we'd - be getting the wrong address. Neither approach is - exactly correct, but this is the most likely to work - in all cases. */ - gnu_actual = convert (gnu_formal_type, - build_unary_op (ADDR_EXPR, NULL_TREE, - gnu_actual)); - } - else if (present_gnu_tree (gnat_formal) - && TREE_CODE (get_gnu_tree (gnat_formal)) == PARM_DECL - && DECL_BY_DESCRIPTOR_P (get_gnu_tree (gnat_formal))) - { - /* If arg is 'Null_Parameter, pass zero descriptor. */ - if ((TREE_CODE (gnu_actual) == INDIRECT_REF - || TREE_CODE (gnu_actual) == UNCONSTRAINED_ARRAY_REF) - && TREE_PRIVATE (gnu_actual)) - gnu_actual - = convert (DECL_ARG_TYPE (get_gnu_tree (gnat_formal)), - integer_zero_node); - else - gnu_actual - = build_unary_op (ADDR_EXPR, NULL_TREE, - fill_vms_descriptor (gnu_actual, - gnat_formal)); - } - else - { - tree gnu_actual_size = TYPE_SIZE (TREE_TYPE (gnu_actual)); - - if (Ekind (gnat_formal) != E_In_Parameter) - gnu_name_list - = chainon (gnu_name_list, - build_tree_list (NULL_TREE, gnu_name)); - - if (! present_gnu_tree (gnat_formal) - || TREE_CODE (get_gnu_tree (gnat_formal)) != PARM_DECL) - continue; - - /* If this is 'Null_Parameter, pass a zero even though we are - dereferencing it. */ - else if (TREE_CODE (gnu_actual) == INDIRECT_REF - && TREE_PRIVATE (gnu_actual) - && host_integerp (gnu_actual_size, 1) - && 0 >= compare_tree_int (gnu_actual_size, - BITS_PER_WORD)) - gnu_actual - = unchecked_convert - (DECL_ARG_TYPE (get_gnu_tree (gnat_formal)), - convert (type_for_size - (tree_low_cst (gnu_actual_size, 1), 1), - integer_zero_node)); - else - gnu_actual - = convert (TYPE_MAIN_VARIANT - (DECL_ARG_TYPE (get_gnu_tree (gnat_formal))), - gnu_actual); - } - - gnu_actual_list - = chainon (gnu_actual_list, - build_tree_list (NULL_TREE, gnu_actual)); - } - - gnu_subprog_call = build (CALL_EXPR, TREE_TYPE (gnu_subprog_type), - gnu_subprog_addr, gnu_actual_list, - NULL_TREE); - TREE_SIDE_EFFECTS (gnu_subprog_call) = 1; - - /* If it is a function call, the result is the call expression. */ - if (Nkind (gnat_node) == N_Function_Call) - { - gnu_result = gnu_subprog_call; - - /* If the function returns an unconstrained array or by reference, - we have to de-dereference the pointer. */ - if (TYPE_RETURNS_UNCONSTRAINED_P (gnu_subprog_type) - || TYPE_RETURNS_BY_REF_P (gnu_subprog_type)) - gnu_result = build_unary_op (INDIRECT_REF, NULL_TREE, - gnu_result); - - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - } - - /* If this is the case where the GNAT tree contains a procedure call - but the Ada procedure has copy in copy out parameters, the special - parameter passing mechanism must be used. */ - else if (TYPE_CI_CO_LIST (gnu_subprog_type) != NULL_TREE) - { - /* List of FIELD_DECLs associated with the PARM_DECLs of the copy - in copy out parameters. */ - tree scalar_return_list = TYPE_CI_CO_LIST (gnu_subprog_type); - int length = list_length (scalar_return_list); - - if (length > 1) - { - tree gnu_name; - - gnu_subprog_call = make_save_expr (gnu_subprog_call); - - /* If any of the names had side-effects, ensure they are - all evaluated before the call. */ - for (gnu_name = gnu_name_list; gnu_name; - gnu_name = TREE_CHAIN (gnu_name)) - if (TREE_SIDE_EFFECTS (TREE_VALUE (gnu_name))) - gnu_subprog_call - = build (COMPOUND_EXPR, TREE_TYPE (gnu_subprog_call), - TREE_VALUE (gnu_name), gnu_subprog_call); - } - - if (Nkind (Name (gnat_node)) == N_Explicit_Dereference) - gnat_formal = First_Formal (Etype (Name (gnat_node))); - else - gnat_formal = First_Formal (Entity (Name (gnat_node))); - - for (gnat_actual = First_Actual (gnat_node); - Present (gnat_actual); - gnat_formal = Next_Formal_With_Extras (gnat_formal), - gnat_actual = Next_Actual (gnat_actual)) - /* If we are dealing with a copy in copy out parameter, we must - retrieve its value from the record returned in the function - call. */ - if (! (present_gnu_tree (gnat_formal) - && TREE_CODE (get_gnu_tree (gnat_formal)) == PARM_DECL - && (DECL_BY_REF_P (get_gnu_tree (gnat_formal)) - || (DECL_BY_COMPONENT_PTR_P - (get_gnu_tree (gnat_formal))) - || DECL_BY_DESCRIPTOR_P (get_gnu_tree (gnat_formal)))) - && Ekind (gnat_formal) != E_In_Parameter) - { - /* Get the value to assign to this OUT or IN OUT - parameter. It is either the result of the function if - there is only a single such parameter or the appropriate - field from the record returned. */ - tree gnu_result - = length == 1 ? gnu_subprog_call - : build_component_ref - (gnu_subprog_call, NULL_TREE, - TREE_PURPOSE (scalar_return_list)); - int unchecked_conversion - = Nkind (gnat_actual) == N_Unchecked_Type_Conversion; - /* If the actual is a conversion, get the inner expression, - which will be the real destination, and convert the - result to the type of the actual parameter. */ - tree gnu_actual - = maybe_unconstrained_array (TREE_VALUE (gnu_name_list)); - - /* If the result is a padded type, remove the padding. */ - if (TREE_CODE (TREE_TYPE (gnu_result)) == RECORD_TYPE - && TYPE_IS_PADDING_P (TREE_TYPE (gnu_result))) - gnu_result - = convert (TREE_TYPE (TYPE_FIELDS - (TREE_TYPE (gnu_result))), - gnu_result); - - /* If the result is a type conversion, do it. */ - if (Nkind (gnat_actual) == N_Type_Conversion) - gnu_result - = convert_with_check - (Etype (Expression (gnat_actual)), gnu_result, - Do_Overflow_Check (gnat_actual), - Do_Range_Check (Expression (gnat_actual)), - Float_Truncate (gnat_actual)); - - else if (unchecked_conversion) - gnu_result - = unchecked_convert (TREE_TYPE (gnu_actual), gnu_result); - else - { - if (Do_Range_Check (gnat_actual)) - gnu_result = emit_range_check (gnu_result, - Etype (gnat_actual)); - - if (! (! TREE_CONSTANT (TYPE_SIZE - (TREE_TYPE (gnu_actual))) - && TREE_CONSTANT (TYPE_SIZE - (TREE_TYPE (gnu_result))))) - gnu_result = convert (TREE_TYPE (gnu_actual), - gnu_result); - } - - set_lineno (gnat_node, 1); - expand_expr_stmt (build_binary_op (MODIFY_EXPR, NULL_TREE, - gnu_actual, gnu_result)); - scalar_return_list = TREE_CHAIN (scalar_return_list); - gnu_name_list = TREE_CHAIN (gnu_name_list); - } - } - else - { - set_lineno (gnat_node, 1); - expand_expr_stmt (gnu_subprog_call); - } - - /* Handle anything we need to assign back. */ - for (gnu_expr = gnu_after_list; - gnu_expr; - gnu_expr = TREE_CHAIN (gnu_expr)) - expand_expr_stmt (build_binary_op (MODIFY_EXPR, NULL_TREE, - TREE_PURPOSE (gnu_expr), - TREE_VALUE (gnu_expr))); - } - break; - - /*************************/ - /* Chapter 7: Packages: */ - /*************************/ - - case N_Package_Declaration: - gnat_to_code (Specification (gnat_node)); - break; - - case N_Package_Specification: - - process_decls (Visible_Declarations (gnat_node), - Private_Declarations (gnat_node), Empty, 1, 1); - break; - - case N_Package_Body: - - /* If this is the body of a generic package - do nothing */ - if (Ekind (Corresponding_Spec (gnat_node)) == E_Generic_Package) - break; - - process_decls (Declarations (gnat_node), Empty, Empty, 1, 1); - - if (Present (Handled_Statement_Sequence (gnat_node))) - { - gnu_block_stack = tree_cons (NULL_TREE, NULL_TREE, gnu_block_stack); - gnat_to_code (Handled_Statement_Sequence (gnat_node)); - gnu_block_stack = TREE_CHAIN (gnu_block_stack); - } - break; - - /*********************************/ - /* Chapter 8: Visibility Rules: */ - /*********************************/ - - case N_Use_Package_Clause: - case N_Use_Type_Clause: - /* Nothing to do here - but these may appear in list of declarations */ - break; - - /***********************/ - /* Chapter 9: Tasks: */ - /***********************/ - - case N_Protected_Type_Declaration: - break; - - case N_Single_Task_Declaration: - gnat_to_gnu_entity (Defining_Entity (gnat_node), NULL_TREE, 1); - break; - - /***********************************************************/ - /* Chapter 10: Program Structure and Compilation Issues: */ - /***********************************************************/ - - case N_Compilation_Unit: - - /* For a body, first process the spec if there is one. */ - if (Nkind (Unit (gnat_node)) == N_Package_Body - || (Nkind (Unit (gnat_node)) == N_Subprogram_Body - && ! Acts_As_Spec (gnat_node))) - gnat_to_code (Library_Unit (gnat_node)); - - process_inlined_subprograms (gnat_node); - - if (type_annotate_only && gnat_node == Cunit (Main_Unit)) - { - elaborate_all_entities (gnat_node); - - if (Nkind (Unit (gnat_node)) == N_Subprogram_Declaration - || Nkind (Unit (gnat_node)) == N_Generic_Package_Declaration - || Nkind (Unit (gnat_node)) == N_Generic_Subprogram_Declaration) - break; - }; - - process_decls (Declarations (Aux_Decls_Node (gnat_node)), - Empty, Empty, 1, 1); - - gnat_to_code (Unit (gnat_node)); - - /* Process any pragmas following the unit. */ - if (Present (Pragmas_After (Aux_Decls_Node (gnat_node)))) - for (gnat_temp = First (Pragmas_After (Aux_Decls_Node (gnat_node))); - gnat_temp; gnat_temp = Next (gnat_temp)) - gnat_to_code (gnat_temp); - - /* Put all the Actions into the elaboration routine if we already had - elaborations. This will happen anyway if they are statements, but we - want to force declarations there too due to order-of-elaboration - issues. Most should have Is_Statically_Allocated set. If we - have had no elaborations, we have no order-of-elaboration issue and - don't want to create elaborations here. */ - if (Is_Non_Empty_List (Actions (Aux_Decls_Node (gnat_node)))) - for (gnat_temp = First (Actions (Aux_Decls_Node (gnat_node))); - Present (gnat_temp); gnat_temp = Next (gnat_temp)) - { - if (pending_elaborations_p ()) - add_pending_elaborations (NULL_TREE, - make_transform_expr (gnat_temp)); - else - gnat_to_code (gnat_temp); - } - - /* Generate elaboration code for this unit, if necessary, and - say whether we did or not. */ - Set_Has_No_Elaboration_Code - (gnat_node, - build_unit_elab - (Defining_Entity (Unit (gnat_node)), - Nkind (Unit (gnat_node)) == N_Package_Body - || Nkind (Unit (gnat_node)) == N_Subprogram_Body, - get_pending_elaborations ())); - - break; - - case N_Subprogram_Body_Stub: - case N_Package_Body_Stub: - case N_Protected_Body_Stub: - case N_Task_Body_Stub: - /* Simply process whatever unit is being inserted. */ - gnat_to_code (Unit (Library_Unit (gnat_node))); - break; - - case N_Subunit: - gnat_to_code (Proper_Body (gnat_node)); - break; - - /***************************/ - /* Chapter 11: Exceptions: */ - /***************************/ - - case N_Handled_Sequence_Of_Statements: - /* If there are exception handlers, start a new binding level that - we can exit (since each exception handler will do so). Then - declare a variable to save the old __gnat_jmpbuf value and a - variable for our jmpbuf. Call setjmp and handle each of the - possible exceptions if it returns one. */ - - if (! type_annotate_only && Present (Exception_Handlers (gnat_node))) - { - tree gnu_jmpsave_decl = 0; - tree gnu_jmpbuf_decl = 0; - tree gnu_cleanup_call = 0; - tree gnu_cleanup_decl; - - pushlevel (0); - expand_start_bindings (1); - - if (! Zero_Cost_Handling (gnat_node)) - { - gnu_jmpsave_decl - = create_var_decl (get_identifier ("JMPBUF_SAVE"), NULL_TREE, - jmpbuf_ptr_type, - build_call_0_expr (get_jmpbuf_decl), - 0, 0, 0, 0, 0); - - gnu_jmpbuf_decl = create_var_decl (get_identifier ("JMP_BUF"), - NULL_TREE, jmpbuf_type, - NULL_TREE, 0, 0, 0, 0, - 0); - TREE_VALUE (gnu_block_stack) = gnu_jmpbuf_decl; - } - - /* See if we are to call a function when exiting this block. */ - if (Present (At_End_Proc (gnat_node))) - { - gnu_cleanup_call - = build_call_0_expr (gnat_to_gnu (At_End_Proc (gnat_node))); - - gnu_cleanup_decl - = create_var_decl (get_identifier ("CLEANUP"), NULL_TREE, - integer_type_node, NULL_TREE, 0, 0, 0, 0, - 0); - - expand_decl_cleanup (gnu_cleanup_decl, gnu_cleanup_call); - } - - if (! Zero_Cost_Handling (gnat_node)) - { - /* When we exit this block, restore the saved value. */ - expand_decl_cleanup (gnu_jmpsave_decl, - build_call_1_expr (set_jmpbuf_decl, - gnu_jmpsave_decl)); - - /* Call setjmp and handle exceptions if it returns one. */ - set_lineno (gnat_node, 1); - expand_start_cond - (build_call_1_expr (setjmp_decl, - build_unary_op (ADDR_EXPR, NULL_TREE, - gnu_jmpbuf_decl)), - 0); - - /* Restore our incoming longjmp value before we do anything. */ - expand_expr_stmt (build_call_1_expr (set_jmpbuf_decl, - gnu_jmpsave_decl)); - - pushlevel (0); - expand_start_bindings (0); - - gnu_except_ptr_stack - = tree_cons (NULL_TREE, - create_var_decl - (get_identifier ("EXCEPT_PTR"), NULL_TREE, - build_pointer_type (except_type_node), - build_call_0_expr (get_excptr_decl), - 0, 0, 0, 0, 0), - gnu_except_ptr_stack); - - /* Generate code for each exception handler. The code at - N_Exception_Handler below does the real work. Note that - we ignore the dummy exception handler for the identifier - case, this is used only by the front end */ - if (Present (Exception_Handlers (gnat_node))) - for (gnat_temp - = First_Non_Pragma (Exception_Handlers (gnat_node)); - Present (gnat_temp); - gnat_temp = Next_Non_Pragma (gnat_temp)) - gnat_to_code (gnat_temp); - - /* If none of the exception handlers did anything, re-raise - but do not defer abortion. */ - set_lineno (gnat_node, 1); - expand_expr_stmt - (build_call_1_expr (raise_nodefer_decl, - TREE_VALUE (gnu_except_ptr_stack))); - - gnu_except_ptr_stack = TREE_CHAIN (gnu_except_ptr_stack); - expand_end_bindings (getdecls (), kept_level_p (), 0); - poplevel (kept_level_p (), 1, 0); - - /* End the "if" on setjmp. Note that we have arranged things so - control never returns here. */ - expand_end_cond (); - - /* This is now immediately before the body proper. Set - our jmp_buf as the current buffer. */ - expand_expr_stmt - (build_call_1_expr (set_jmpbuf_decl, - build_unary_op (ADDR_EXPR, NULL_TREE, - gnu_jmpbuf_decl))); - } - } - - /* If there are no exception handlers, we must not have an at end - cleanup identifier, since the cleanup identifier should always - generate a corresponding exception handler. */ - else if (! type_annotate_only && Present (At_End_Proc (gnat_node))) - gigi_abort (335); - - /* Generate code and declarations for the prefix of this block, - if any. */ - if (Present (First_Real_Statement (gnat_node))) - process_decls (Statements (gnat_node), Empty, - First_Real_Statement (gnat_node), 1, 1); - - /* Generate code for each statement in the block. */ - for (gnat_temp = (Present (First_Real_Statement (gnat_node)) - ? First_Real_Statement (gnat_node) - : First (Statements (gnat_node))); - Present (gnat_temp); gnat_temp = Next (gnat_temp)) - gnat_to_code (gnat_temp); - - /* For zero-cost exceptions, exit the block and then compile - the handlers. */ - if (! type_annotate_only && Zero_Cost_Handling (gnat_node) - && Present (Exception_Handlers (gnat_node))) - { - expand_exit_something (); - gnu_except_ptr_stack - = tree_cons (NULL_TREE, error_mark_node, gnu_except_ptr_stack); - - for (gnat_temp = First_Non_Pragma (Exception_Handlers (gnat_node)); - Present (gnat_temp); - gnat_temp = Next_Non_Pragma (gnat_temp)) - gnat_to_code (gnat_temp); - - gnu_except_ptr_stack = TREE_CHAIN (gnu_except_ptr_stack); - } - - /* If we have handlers, close the block we made. */ - if (! type_annotate_only && Present (Exception_Handlers (gnat_node))) - { - expand_end_bindings (getdecls (), kept_level_p (), 0); - poplevel (kept_level_p (), 1, 0); - } - - break; - - case N_Exception_Handler: - if (! Zero_Cost_Handling (gnat_node)) - { - /* Unless this is "Others" or the special "Non-Ada" exception - for Ada, make an "if" statement to select the proper - exceptions. For "Others", exclude exceptions where - Handled_By_Others is nonzero unless the All_Others flag is set. - For "Non-ada", accept an exception if "Lang" is 'V'. */ - tree gnu_choice = integer_zero_node; - - for (gnat_temp = First (Exception_Choices (gnat_node)); - gnat_temp; gnat_temp = Next (gnat_temp)) - { - tree this_choice; - - if (Nkind (gnat_temp) == N_Others_Choice) - { - if (All_Others (gnat_temp)) - this_choice = integer_one_node; - else - this_choice - = build_binary_op - (EQ_EXPR, integer_type_node, - convert - (integer_type_node, - build_component_ref - (build_unary_op - (INDIRECT_REF, NULL_TREE, - TREE_VALUE (gnu_except_ptr_stack)), - get_identifier ("not_handled_by_others"), NULL_TREE)), - integer_zero_node); - } - - else if (Nkind (gnat_temp) == N_Identifier - || Nkind (gnat_temp) == N_Expanded_Name) - { - /* ??? Note that we have to use gnat_to_gnu_entity here - since the type of the exception will be wrong in the - VMS case and that's exactly what this test is for. */ - gnu_expr - = gnat_to_gnu_entity (Entity (gnat_temp), NULL_TREE, 0); - - /* If this was a VMS exception, check import_code - against the value of the exception. */ - if (TREE_CODE (TREE_TYPE (gnu_expr)) == INTEGER_TYPE) - this_choice - = build_binary_op - (EQ_EXPR, integer_type_node, - build_component_ref - (build_unary_op - (INDIRECT_REF, NULL_TREE, - TREE_VALUE (gnu_except_ptr_stack)), - get_identifier ("import_code"), NULL_TREE), - gnu_expr); - else - this_choice - = build_binary_op - (EQ_EXPR, integer_type_node, - TREE_VALUE (gnu_except_ptr_stack), - convert - (TREE_TYPE (TREE_VALUE (gnu_except_ptr_stack)), - build_unary_op (ADDR_EXPR, NULL_TREE, gnu_expr))); - - /* If this is the distinguished exception "Non_Ada_Error" - (and we are in VMS mode), also allow a non-Ada - exception (a VMS condition) to match. */ - if (Is_Non_Ada_Error (Entity (gnat_temp))) - { - tree gnu_comp - = build_component_ref - (build_unary_op - (INDIRECT_REF, NULL_TREE, - TREE_VALUE (gnu_except_ptr_stack)), - get_identifier ("lang"), NULL_TREE); - - this_choice - = build_binary_op - (TRUTH_ORIF_EXPR, integer_type_node, - build_binary_op - (EQ_EXPR, integer_type_node, gnu_comp, - convert (TREE_TYPE (gnu_comp), - build_int_2 ('V', 0))), - this_choice); - } - } - else - gigi_abort (318); - - gnu_choice = build_binary_op (TRUTH_ORIF_EXPR, integer_type_node, - gnu_choice, this_choice); - } - - set_lineno (gnat_node, 1); - - expand_start_cond (gnu_choice, 0); - } - - for (gnat_temp = First (Statements (gnat_node)); - gnat_temp; gnat_temp = Next (gnat_temp)) - gnat_to_code (gnat_temp); - - /* At the end of the handler, exit the block. We made this block - in N_Handled_Sequence_Of_Statements. */ - expand_exit_something (); - - if (! Zero_Cost_Handling (gnat_node)) - expand_end_cond (); - - break; - - /*******************************/ - /* Chapter 12: Generic Units: */ - /*******************************/ - - case N_Generic_Function_Renaming_Declaration: - case N_Generic_Package_Renaming_Declaration: - case N_Generic_Procedure_Renaming_Declaration: - case N_Generic_Package_Declaration: - case N_Generic_Subprogram_Declaration: - case N_Package_Instantiation: - case N_Procedure_Instantiation: - case N_Function_Instantiation: - /* These nodes can appear on a declaration list but there is nothing to - to be done with them. */ - break; - - - /***************************************************/ - /* Chapter 13: Representation Clauses and */ - /* Implementation-Dependent Features: */ - /***************************************************/ - - case N_Attribute_Definition_Clause: - - /* The only one we need deal with is for 'Address. For the others, SEM - puts the information elsewhere. We need only deal with 'Address - if the object has a Freeze_Node (which it never will currently). */ - if (Get_Attribute_Id (Chars (gnat_node)) != Attr_Address - || No (Freeze_Node (Entity (Name (gnat_node))))) - break; - - /* Get the value to use as the address and save it as the - equivalent for GNAT_TEMP. When the object is frozen, - gnat_to_gnu_entity will do the right thing. */ - gnu_expr = gnat_to_gnu (Expression (gnat_node)); - save_gnu_tree (Entity (Name (gnat_node)), gnu_expr, 1); - break; - - case N_Enumeration_Representation_Clause: - case N_Record_Representation_Clause: - case N_At_Clause: - /* We do nothing with these. SEM puts the information elsewhere. */ - break; - - case N_Code_Statement: - if (! type_annotate_only) - { - tree gnu_template = gnat_to_gnu (Asm_Template (gnat_node)); - tree gnu_input_list = 0, gnu_output_list = 0, gnu_orig_out_list = 0; - tree gnu_clobber_list = 0; - char *clobber; - - /* First process inputs, then outputs, then clobbers. */ - Setup_Asm_Inputs (gnat_node); - while (Present (gnat_temp = Asm_Input_Value ())) - { - tree gnu_value = gnat_to_gnu (gnat_temp); - tree gnu_constr = build_tree_list (NULL_TREE, gnat_to_gnu - (Asm_Input_Constraint ())); - - gnu_input_list - = tree_cons (gnu_constr, gnu_value, gnu_input_list); - Next_Asm_Input (); - } - - Setup_Asm_Outputs (gnat_node); - while (Present (gnat_temp = Asm_Output_Variable ())) - { - tree gnu_value = gnat_to_gnu (gnat_temp); - tree gnu_constr = build_tree_list (NULL_TREE, gnat_to_gnu - (Asm_Output_Constraint ())); - - gnu_orig_out_list - = tree_cons (gnu_constr, gnu_value, gnu_orig_out_list); - gnu_output_list - = tree_cons (gnu_constr, gnu_value, gnu_output_list); - Next_Asm_Output (); - } - - Clobber_Setup (gnat_node); - while ((clobber = Clobber_Get_Next ()) != 0) - gnu_clobber_list - = tree_cons (NULL_TREE, - build_string (strlen (clobber) + 1, clobber), - gnu_clobber_list); - - expand_asm_operands (gnu_template, nreverse (gnu_output_list), - nreverse (gnu_input_list), gnu_clobber_list, - Is_Asm_Volatile (gnat_node), - input_filename, lineno); - - /* Copy all the intermediate outputs into the specified outputs. */ - for (; gnu_output_list; - (gnu_output_list = TREE_CHAIN (gnu_output_list), - gnu_orig_out_list = TREE_CHAIN (gnu_orig_out_list))) - if (TREE_VALUE (gnu_orig_out_list) != TREE_VALUE (gnu_output_list)) - { - expand_expr_stmt - (build_binary_op (MODIFY_EXPR, NULL_TREE, - TREE_VALUE (gnu_orig_out_list), - TREE_VALUE (gnu_output_list))); - free_temp_slots (); - } - } - break; - - /***************************************************/ - /* Added Nodes */ - /***************************************************/ - - case N_Freeze_Entity: - process_freeze_entity (gnat_node); - process_decls (Actions (gnat_node), Empty, Empty, 1, 1); - break; - - case N_Itype_Reference: - if (! present_gnu_tree (Itype (gnat_node))) - process_type (Itype (gnat_node)); - break; - - case N_Free_Statement: - if (! type_annotate_only) - { - tree gnu_ptr = gnat_to_gnu (Expression (gnat_node)); - tree gnu_obj_type; - tree gnu_obj_size; - int align; - - /* If this is an unconstrained array, we know the object must - have been allocated with the template in front of the object. - So pass the template address, but get the total size. Do this - by converting to a thin pointer. */ - if (TYPE_FAT_POINTER_P (TREE_TYPE (gnu_ptr))) - gnu_ptr - = convert (build_pointer_type - (TYPE_OBJECT_RECORD_TYPE - (TYPE_UNCONSTRAINED_ARRAY (TREE_TYPE (gnu_ptr)))), - gnu_ptr); - - gnu_obj_type = TREE_TYPE (TREE_TYPE (gnu_ptr)); - gnu_obj_size = TYPE_SIZE_UNIT (gnu_obj_type); - align = TYPE_ALIGN (gnu_obj_type); - - if (TREE_CODE (gnu_obj_type) == RECORD_TYPE - && TYPE_CONTAINS_TEMPLATE_P (gnu_obj_type)) - { - tree gnu_char_ptr_type = build_pointer_type (char_type_node); - tree gnu_pos = byte_position (TYPE_FIELDS (gnu_obj_type)); - tree gnu_byte_offset - = convert (gnu_char_ptr_type, - size_diffop (size_zero_node, gnu_pos)); - - gnu_ptr = convert (gnu_char_ptr_type, gnu_ptr); - gnu_ptr = build_binary_op (MINUS_EXPR, gnu_char_ptr_type, - gnu_ptr, gnu_byte_offset); - } - - set_lineno (gnat_node, 1); - expand_expr_stmt - (build_call_alloc_dealloc (gnu_ptr, gnu_obj_size, align, - Procedure_To_Call (gnat_node), - Storage_Pool (gnat_node))); - } - break; - - case N_Raise_Constraint_Error: - case N_Raise_Program_Error: - case N_Raise_Storage_Error: - - if (type_annotate_only) - break; - - gnu_result_type = get_unpadded_type (Etype (gnat_node)); - gnu_result - = build_call_raise - (Nkind (gnat_node) == N_Raise_Constraint_Error - ? raise_constraint_error_decl - : Nkind (gnat_node) == N_Raise_Program_Error - ? raise_program_error_decl : raise_storage_error_decl); - - /* If the type is VOID, this is a statement, so we need to - generate the code for the call. Handle a Condition, if there - is one. */ - if (TREE_CODE (gnu_result_type) == VOID_TYPE) - { - set_lineno (gnat_node, 1); - - if (Present (Condition (gnat_node))) - expand_start_cond (gnat_to_gnu (Condition (gnat_node)), 0); - - expand_expr_stmt (gnu_result); - if (Present (Condition (gnat_node))) - expand_end_cond (); - gnu_result = error_mark_node; - } - else - gnu_result = build1 (NULL_EXPR, gnu_result_type, gnu_result); - break; - - /* Nothing to do, since front end does all validation using the - values that Gigi back-annotates. */ - case N_Validate_Unchecked_Conversion: - break; - - case N_Raise_Statement: - case N_Function_Specification: - case N_Procedure_Specification: - case N_Op_Concat: - case N_Component_Association: - case N_Task_Body: - default: - if (! type_annotate_only) - gigi_abort (321); - } - - /* If the result is a constant that overflows, raise constraint error. */ - if (TREE_CODE (gnu_result) == INTEGER_CST - && TREE_CONSTANT_OVERFLOW (gnu_result)) - { - post_error ("Constraint_Error will be raised at run-time?", gnat_node); - - gnu_result - = build1 (NULL_EXPR, gnu_result_type, - build_call_raise (raise_constraint_error_decl)); - } - - /* If our result has side-effects and is of an unconstrained type, - make a SAVE_EXPR so that we can be sure it will only be referenced - once. Note we must do this before any conversions. */ - if (TREE_SIDE_EFFECTS (gnu_result) - && (TREE_CODE (gnu_result_type) == UNCONSTRAINED_ARRAY_TYPE - || (TREE_CODE (TYPE_SIZE (gnu_result_type)) != INTEGER_CST - && contains_placeholder_p (TYPE_SIZE (gnu_result_type))))) - gnu_result = gnat_stabilize_reference (gnu_result, 0); - - /* Now convert the result to the proper type. If the type is void or if - we have no result, return error_mark_node to show we have no result. - If the type of the result is correct or if we have a label (which doesn't - have any well-defined type), return our result. Also don't do the - conversion if the "desired" type involves a PLACEHOLDER_EXPR in its size - since those are the cases where the front end may have the type wrong due - to "instantiating" the unconstrained record with discriminant values - or if this is a FIELD_DECL. If this is the Name of an assignment - statement or a parameter of a procedure call, return what we have since - the RHS has to be converted to our type there in that case, unless - GNU_RESULT_TYPE has a simpler size. Similarly, if the two types are - record types with the same name, the expression type has integral mode, - and GNU_RESULT_TYPE BLKmode, don't convert. This will be the case when - we are converting from a packable type to its actual type and we need - those conversions to be NOPs in order for assignments into these types to - work properly if the inner object is a bitfield and hence can't have - its address taken. Finally, don't convert integral types that are the - operand of an unchecked conversion since we need to ignore those - conversions (for 'Valid). Otherwise, convert the result to the proper - type. */ - - if (Present (Parent (gnat_node)) - && ((Nkind (Parent (gnat_node)) == N_Assignment_Statement - && Name (Parent (gnat_node)) == gnat_node) - || (Nkind (Parent (gnat_node)) == N_Procedure_Call_Statement - && Name (Parent (gnat_node)) != gnat_node) - || (Nkind (Parent (gnat_node)) == N_Unchecked_Type_Conversion - && ! AGGREGATE_TYPE_P (gnu_result_type) - && ! AGGREGATE_TYPE_P (TREE_TYPE (gnu_result))) - || Nkind (Parent (gnat_node)) == N_Parameter_Association) - && ! (TYPE_SIZE (gnu_result_type) != 0 - && TYPE_SIZE (TREE_TYPE (gnu_result)) != 0 - && (AGGREGATE_TYPE_P (gnu_result_type) - == AGGREGATE_TYPE_P (TREE_TYPE (gnu_result))) - && ((TREE_CODE (TYPE_SIZE (gnu_result_type)) == INTEGER_CST - && (TREE_CODE (TYPE_SIZE (TREE_TYPE (gnu_result))) - != INTEGER_CST)) - || (TREE_CODE (TYPE_SIZE (gnu_result_type)) != INTEGER_CST - && (TREE_CODE (TYPE_SIZE (TREE_TYPE (gnu_result))) - != INTEGER_CST) - && ! (contains_placeholder_p (TYPE_SIZE (gnu_result_type))) - && (contains_placeholder_p - (TYPE_SIZE (TREE_TYPE (gnu_result)))))) - && ! (TREE_CODE (gnu_result_type) == RECORD_TYPE - && TYPE_LEFT_JUSTIFIED_MODULAR_P (gnu_result_type)))) - { - /* In this case remove padding only if the inner object is of - self-referential size: in that case it must be an object of - unconstrained type with a default discriminant. In other cases, - we want to avoid copying too much data. */ - if (TREE_CODE (TREE_TYPE (gnu_result)) == RECORD_TYPE - && TYPE_IS_PADDING_P (TREE_TYPE (gnu_result)) - && contains_placeholder_p (TYPE_SIZE - (TREE_TYPE (TYPE_FIELDS - (TREE_TYPE (gnu_result)))))) - gnu_result = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_result))), - gnu_result); - } - - else if (TREE_CODE (gnu_result) == LABEL_DECL - || TREE_CODE (gnu_result) == FIELD_DECL - || TREE_CODE (gnu_result) == ERROR_MARK - || (TYPE_SIZE (gnu_result_type) != 0 - && TREE_CODE (TYPE_SIZE (gnu_result_type)) != INTEGER_CST - && TREE_CODE (gnu_result) != INDIRECT_REF - && contains_placeholder_p (TYPE_SIZE (gnu_result_type))) - || ((TYPE_NAME (gnu_result_type) - == TYPE_NAME (TREE_TYPE (gnu_result))) - && TREE_CODE (gnu_result_type) == RECORD_TYPE - && TREE_CODE (TREE_TYPE (gnu_result)) == RECORD_TYPE - && TYPE_MODE (gnu_result_type) == BLKmode - && (GET_MODE_CLASS (TYPE_MODE (TREE_TYPE (gnu_result))) - == MODE_INT))) - { - /* Remove any padding record, but do nothing more in this case. */ - if (TREE_CODE (TREE_TYPE (gnu_result)) == RECORD_TYPE - && TYPE_IS_PADDING_P (TREE_TYPE (gnu_result))) - gnu_result = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_result))), - gnu_result); - } - - else if (gnu_result == error_mark_node - || gnu_result_type == void_type_node) - gnu_result = error_mark_node; - else if (gnu_result_type != TREE_TYPE (gnu_result)) - gnu_result = convert (gnu_result_type, gnu_result); - - /* We don't need any NOP_EXPR or NON_LVALUE_EXPR on GNU_RESULT. */ - while ((TREE_CODE (gnu_result) == NOP_EXPR - || TREE_CODE (gnu_result) == NON_LVALUE_EXPR) - && TREE_TYPE (TREE_OPERAND (gnu_result, 0)) == TREE_TYPE (gnu_result)) - gnu_result = TREE_OPERAND (gnu_result, 0); - - return gnu_result; -} - -/* Force references to each of the entities in packages GNAT_NODE with's - so that the debugging information for all of them are identical - in all clients. Operate recursively on anything it with's, but check - that we aren't elaborating something more than once. */ - -/* The reason for this routine's existence is two-fold. - First, with some debugging formats, notably MDEBUG on SGI - IRIX, the linker will remove duplicate debugging information if two - clients have identical debugguing information. With the normal scheme - of elaboration, this does not usually occur, since entities in with'ed - packages are elaborated on demand, and if clients have different usage - patterns, the normal case, then the order and selection of entities - will differ. In most cases however, it seems that linkers do not know - how to eliminate duplicate debugging information, even if it is - identical, so the use of this routine would increase the total amount - of debugging information in the final executable. - - Second, this routine is called in type_annotate mode, to compute DDA - information for types in withed units, for ASIS use */ - -static void -elaborate_all_entities (gnat_node) - Node_Id gnat_node; -{ - Entity_Id gnat_with_clause, gnat_entity; - - save_gnu_tree (gnat_node, integer_zero_node, 1); - - /* Save entities in all context units. A body may have an implicit_with - on its own spec, if the context includes a child unit, so don't save - the spec twice. */ - - for (gnat_with_clause = First (Context_Items (gnat_node)); - Present (gnat_with_clause); - gnat_with_clause = Next (gnat_with_clause)) - if (Nkind (gnat_with_clause) == N_With_Clause - && ! present_gnu_tree (Library_Unit (gnat_with_clause)) - && Library_Unit (gnat_with_clause) != Library_Unit (Cunit (Main_Unit))) - { - elaborate_all_entities (Library_Unit (gnat_with_clause)); - - if (Ekind (Entity (Name (gnat_with_clause))) == E_Package) - for (gnat_entity = First_Entity (Entity (Name (gnat_with_clause))); - Present (gnat_entity); - gnat_entity = Next_Entity (gnat_entity)) - if (Is_Public (gnat_entity) - && Convention (gnat_entity) != Convention_Intrinsic - && Ekind (gnat_entity) != E_Package - && Ekind (gnat_entity) != E_Package_Body - && Ekind (gnat_entity) != E_Operator - && ! (IN (Ekind (gnat_entity), Type_Kind) - && ! Is_Frozen (gnat_entity)) - && ! ((Ekind (gnat_entity) == E_Procedure - || Ekind (gnat_entity) == E_Function) - && Is_Intrinsic_Subprogram (gnat_entity)) - && ! IN (Ekind (gnat_entity), Named_Kind) - && ! IN (Ekind (gnat_entity), Generic_Unit_Kind)) - gnat_to_gnu_entity (gnat_entity, NULL_TREE, 0); - } - - if (Nkind (Unit (gnat_node)) == N_Package_Body && type_annotate_only) - elaborate_all_entities (Library_Unit (gnat_node)); -} - -/* Do the processing of N_Freeze_Entity, GNAT_NODE. */ - -static void -process_freeze_entity (gnat_node) - Node_Id gnat_node; -{ - Entity_Id gnat_entity = Entity (gnat_node); - tree gnu_old; - tree gnu_new; - tree gnu_init - = (Nkind (Declaration_Node (gnat_entity)) == N_Object_Declaration - && present_gnu_tree (Declaration_Node (gnat_entity))) - ? get_gnu_tree (Declaration_Node (gnat_entity)) : NULL_TREE; - - /* If this is a package, need to generate code for the package. */ - if (Ekind (gnat_entity) == E_Package) - { - insert_code_for - (Parent (Corresponding_Body - (Parent (Declaration_Node (gnat_entity))))); - return; - } - - /* Check for old definition after the above call. This Freeze_Node - might be for one its Itypes. */ - gnu_old - = present_gnu_tree (gnat_entity) ? get_gnu_tree (gnat_entity) : 0; - - /* If this entity has an Address representation clause, GNU_OLD is the - address, so discard it here. */ - if (Present (Address_Clause (gnat_entity))) - gnu_old = 0; - - /* Don't do anything for class-wide types they are always - transformed into their root type. */ - if (Ekind (gnat_entity) == E_Class_Wide_Type - || (Ekind (gnat_entity) == E_Class_Wide_Subtype - && Present (Equivalent_Type (gnat_entity)))) - return; - - /* Don't do anything for subprograms that may have been elaborated before - their freeze nodes. This can happen, for example because of an inner call - in an instance body. */ - if (gnu_old != 0 - && TREE_CODE (gnu_old) == FUNCTION_DECL - && (Ekind (gnat_entity) == E_Function - || Ekind (gnat_entity) == E_Procedure)) - return; - - /* If we have a non-dummy type old tree, we have nothing to do. Unless - this is the public view of a private type whose full view was not - delayed, this node was never delayed as it should have been. - Also allow this to happen for concurrent types since we may have - frozen both the Corresponding_Record_Type and this type. */ - if (gnu_old != 0 - && ! (TREE_CODE (gnu_old) == TYPE_DECL - && TYPE_IS_DUMMY_P (TREE_TYPE (gnu_old)))) - { - if (IN (Ekind (gnat_entity), Incomplete_Or_Private_Kind) - && Present (Full_View (gnat_entity)) - && No (Freeze_Node (Full_View (gnat_entity)))) - return; - else if (Is_Concurrent_Type (gnat_entity)) - return; - else - gigi_abort (320); - } - - /* Reset the saved tree, if any, and elaborate the object or type for real. - If there is a full declaration, elaborate it and copy the type to - GNAT_ENTITY. Likewise if this is the record subtype corresponding to - a class wide type or subtype. */ - if (gnu_old != 0) - { - save_gnu_tree (gnat_entity, NULL_TREE, 0); - if (IN (Ekind (gnat_entity), Incomplete_Or_Private_Kind) - && Present (Full_View (gnat_entity)) - && present_gnu_tree (Full_View (gnat_entity))) - save_gnu_tree (Full_View (gnat_entity), NULL_TREE, 0); - if (Present (Class_Wide_Type (gnat_entity)) - && Class_Wide_Type (gnat_entity) != gnat_entity) - save_gnu_tree (Class_Wide_Type (gnat_entity), NULL_TREE, 0); - } - - if (IN (Ekind (gnat_entity), Incomplete_Or_Private_Kind) - && Present (Full_View (gnat_entity))) - { - gnu_new = gnat_to_gnu_entity (Full_View (gnat_entity), NULL_TREE, 1); - - /* The above call may have defined this entity (the simplest example - of this is when we have a private enumeral type since the bounds - will have the public view. */ - if (! present_gnu_tree (gnat_entity)) - save_gnu_tree (gnat_entity, gnu_new, 0); - if (Present (Class_Wide_Type (gnat_entity)) - && Class_Wide_Type (gnat_entity) != gnat_entity) - save_gnu_tree (Class_Wide_Type (gnat_entity), gnu_new, 0); - } - else - gnu_new = gnat_to_gnu_entity (gnat_entity, gnu_init, 1); - - /* If we've made any pointers to the old version of this type, we - have to update them. Also copy the name of the old object to - the new one. */ - - if (gnu_old != 0) - { - DECL_NAME (gnu_new) = DECL_NAME (gnu_old); - update_pointer_to (TYPE_MAIN_VARIANT (TREE_TYPE (gnu_old)), - TREE_TYPE (gnu_new)); - } -} - -/* Process the list of inlined subprograms of GNAT_NODE, which is an - N_Compilation_Unit. */ - -static void -process_inlined_subprograms (gnat_node) - Node_Id gnat_node; -{ - Entity_Id gnat_entity; - Node_Id gnat_body; - - /* If we can inline, generate RTL for all the inlined subprograms. - Define the entity first so we set DECL_EXTERNAL. */ - if (optimize > 0 && ! flag_no_inline) - for (gnat_entity = First_Inlined_Subprogram (gnat_node); - Present (gnat_entity); - gnat_entity = Next_Inlined_Subprogram (gnat_entity)) - { - gnat_body = Parent (Declaration_Node (gnat_entity)); - - if (Nkind (gnat_body) != N_Subprogram_Body) - { - /* ??? This really should always be Present. */ - if (No (Corresponding_Body (gnat_body))) - continue; - - gnat_body - = Parent (Declaration_Node (Corresponding_Body (gnat_body))); - } - - if (Present (gnat_body)) - { - gnat_to_gnu_entity (gnat_entity, NULL_TREE, 0); - gnat_to_code (gnat_body); - } - } -} - -/* Elaborate decls in the lists GNAT_DECLS and GNAT_DECLS2, if present. - We make two passes, one to elaborate anything other than bodies (but - we declare a function if there was no spec). The second pass - elaborates the bodies. - - GNAT_END_LIST gives the element in the list past the end. Normally, - this is Empty, but can be First_Real_Statement for a - Handled_Sequence_Of_Statements. - - We make a complete pass through both lists if PASS1P is true, then make - the second pass over both lists if PASS2P is true. The lists usually - correspond to the public and private parts of a package. */ - -static void -process_decls (gnat_decls, gnat_decls2, gnat_end_list, pass1p, pass2p) - List_Id gnat_decls, gnat_decls2; - Node_Id gnat_end_list; - int pass1p, pass2p; -{ - List_Id gnat_decl_array[2]; - Node_Id gnat_decl; - int i; - - gnat_decl_array[0] = gnat_decls, gnat_decl_array[1] = gnat_decls2; - - if (pass1p) - for (i = 0; i <= 1; i++) - if (Present (gnat_decl_array[i])) - for (gnat_decl = First (gnat_decl_array[i]); - gnat_decl != gnat_end_list; gnat_decl = Next (gnat_decl)) - { - set_lineno (gnat_decl, 0); - - /* For package specs, we recurse inside the declarations, - thus taking the two pass approach inside the boundary. */ - if (Nkind (gnat_decl) == N_Package_Declaration - && (Nkind (Specification (gnat_decl) - == N_Package_Specification))) - process_decls (Visible_Declarations (Specification (gnat_decl)), - Private_Declarations (Specification (gnat_decl)), - Empty, 1, 0); - - /* Similarly for any declarations in the actions of a - freeze node. */ - else if (Nkind (gnat_decl) == N_Freeze_Entity) - { - process_freeze_entity (gnat_decl); - process_decls (Actions (gnat_decl), Empty, Empty, 1, 0); - } - - /* Package bodies with freeze nodes get their elaboration deferred - until the freeze node, but the code must be placed in the right - place, so record the code position now. */ - else if (Nkind (gnat_decl) == N_Package_Body - && Present (Freeze_Node (Corresponding_Spec (gnat_decl)))) - record_code_position (gnat_decl); - - else if (Nkind (gnat_decl) == N_Package_Body_Stub - && Present (Library_Unit (gnat_decl)) - && Present (Freeze_Node - (Corresponding_Spec - (Proper_Body (Unit - (Library_Unit (gnat_decl))))))) - record_code_position - (Proper_Body (Unit (Library_Unit (gnat_decl)))); - - /* We defer most subprogram bodies to the second pass. - However, Init_Proc subprograms cannot be defered, but luckily - don't need to be. */ - else if ((Nkind (gnat_decl) == N_Subprogram_Body - && (Chars (Defining_Entity (gnat_decl)) - != Name_uInit_Proc))) - { - if (Acts_As_Spec (gnat_decl)) - { - Node_Id gnat_subprog_id = Defining_Entity (gnat_decl); - - if (Ekind (gnat_subprog_id) != E_Generic_Procedure - && Ekind (gnat_subprog_id) != E_Generic_Function) - gnat_to_gnu_entity (gnat_subprog_id, NULL_TREE, 1); - } - } - /* For bodies and stubs that act as their own specs, the entity - itself must be elaborated in the first pass, because it may - be used in other declarations. */ - else if (Nkind (gnat_decl) == N_Subprogram_Body_Stub) - { - Node_Id gnat_subprog_id = - Defining_Entity (Specification (gnat_decl)); - - if (Ekind (gnat_subprog_id) != E_Subprogram_Body - && Ekind (gnat_subprog_id) != E_Generic_Procedure - && Ekind (gnat_subprog_id) != E_Generic_Function) - gnat_to_gnu_entity (gnat_subprog_id, NULL_TREE, 1); - } - - /* Concurrent stubs stand for the corresponding subprogram bodies, - which are deferred like other bodies. */ - else if (Nkind (gnat_decl) == N_Task_Body_Stub - || Nkind (gnat_decl) == N_Protected_Body_Stub) - ; - - else - gnat_to_code (gnat_decl); - } - - /* Here we elaborate everything we deferred above except for package bodies, - which are elaborated at their freeze nodes. Note that we must also - go inside things (package specs and freeze nodes) the first pass did. */ - if (pass2p) - for (i = 0; i <= 1; i++) - if (Present (gnat_decl_array[i])) - for (gnat_decl = First (gnat_decl_array[i]); - gnat_decl != gnat_end_list; gnat_decl = Next (gnat_decl)) - { - if ((Nkind (gnat_decl) == N_Subprogram_Body - && (Chars (Defining_Entity (gnat_decl)) - != Name_uInit_Proc)) - || Nkind (gnat_decl) == N_Subprogram_Body_Stub - || Nkind (gnat_decl) == N_Task_Body_Stub - || Nkind (gnat_decl) == N_Protected_Body_Stub) - gnat_to_code (gnat_decl); - - else if (Nkind (gnat_decl) == N_Package_Declaration - && (Nkind (Specification (gnat_decl) - == N_Package_Specification))) - process_decls (Visible_Declarations (Specification (gnat_decl)), - Private_Declarations (Specification (gnat_decl)), - Empty, 0, 1); - - else if (Nkind (gnat_decl) == N_Freeze_Entity) - process_decls (Actions (gnat_decl), Empty, Empty, 0, 1); - } -} - -/* Emits an access check. GNU_EXPR is the expression that needs to be - checked against the NULL pointer. */ - -static tree -emit_access_check (gnu_expr) - tree gnu_expr; -{ - tree gnu_type = TREE_TYPE (gnu_expr); - - /* This only makes sense if GNU_TYPE is a pointer of some sort. */ - if (! POINTER_TYPE_P (gnu_type) && ! TYPE_FAT_POINTER_P (gnu_type)) - gigi_abort (322); - - /* Checked expressions must be evaluated only once. */ - gnu_expr = make_save_expr (gnu_expr); - - return emit_check (build_binary_op (EQ_EXPR, integer_type_node, - gnu_expr, - convert (TREE_TYPE (gnu_expr), - integer_zero_node)), - gnu_expr); -} - -/* Emits a discriminant check. GNU_EXPR is the expression to be checked and - GNAT_NODE a N_Selected_Component node. */ - -static tree -emit_discriminant_check (gnu_expr, gnat_node) - tree gnu_expr; - Node_Id gnat_node; -{ - Entity_Id orig_comp - = Original_Record_Component (Entity (Selector_Name (gnat_node))); - Entity_Id gnat_discr_fct = Discriminant_Checking_Func (orig_comp); - tree gnu_discr_fct; - Entity_Id gnat_discr; - tree gnu_actual_list = NULL_TREE; - tree gnu_cond; - Entity_Id gnat_pref_type; - tree gnu_pref_type; - - if (Is_Tagged_Type (Scope (orig_comp))) - gnat_pref_type = Scope (orig_comp); - else - gnat_pref_type = Etype (Prefix (gnat_node)); - - if (! Present (gnat_discr_fct)) - return gnu_expr; - - gnu_discr_fct = gnat_to_gnu (gnat_discr_fct); - - /* Checked expressions must be evaluated only once. */ - gnu_expr = make_save_expr (gnu_expr); - - /* Create the list of the actual parameters as GCC expects it. - This list is the list of the discriminant fields of the - record expression to be discriminant checked. For documentation - on what is the GCC format for this list see under the - N_Function_Call case */ - - while (IN (Ekind (gnat_pref_type), Incomplete_Or_Private_Kind) - || IN (Ekind (gnat_pref_type), Access_Kind)) - { - if (IN (Ekind (gnat_pref_type), Incomplete_Or_Private_Kind)) - gnat_pref_type = Underlying_Type (gnat_pref_type); - else if (IN (Ekind (gnat_pref_type), Access_Kind)) - gnat_pref_type = Designated_Type (gnat_pref_type); - } - - gnu_pref_type - = TREE_TYPE (gnat_to_gnu_entity (gnat_pref_type, NULL_TREE, 0)); - - for (gnat_discr = First_Discriminant (gnat_pref_type); - Present (gnat_discr); gnat_discr = Next_Discriminant (gnat_discr)) - { - Entity_Id gnat_real_discr - = ((Present (Corresponding_Discriminant (gnat_discr)) - && Present (Parent_Subtype (gnat_pref_type))) - ? Corresponding_Discriminant (gnat_discr) : gnat_discr); - tree gnu_discr = gnat_to_gnu_entity (gnat_real_discr, NULL_TREE, 0); - - gnu_actual_list - = chainon (gnu_actual_list, - build_tree_list (NULL_TREE, - build_component_ref - (convert (gnu_pref_type, gnu_expr), - NULL_TREE, gnu_discr))); - } - - gnu_cond = build (CALL_EXPR, - TREE_TYPE (TREE_TYPE (gnu_discr_fct)), - build_unary_op (ADDR_EXPR, NULL_TREE, gnu_discr_fct), - gnu_actual_list, - NULL_TREE); - TREE_SIDE_EFFECTS (gnu_cond) = 1; - - return - build_unary_op - (INDIRECT_REF, NULL_TREE, - emit_check (gnu_cond, - build_unary_op (ADDR_EXPR, - build_reference_type (TREE_TYPE (gnu_expr)), - gnu_expr))); -} - -/* Emit code for a range check. GNU_EXPR is the expression to be checked, - GNAT_RANGE_TYPE the gnat type or subtype containing the bounds against - which we have to check. */ - -static tree -emit_range_check (gnu_expr, gnat_range_type) - tree gnu_expr; - Entity_Id gnat_range_type; -{ - tree gnu_range_type = get_unpadded_type (gnat_range_type); - tree gnu_low = TYPE_MIN_VALUE (gnu_range_type); - tree gnu_high = TYPE_MAX_VALUE (gnu_range_type); - tree gnu_compare_type = get_base_type (TREE_TYPE (gnu_expr)); - - /* If GNU_EXPR has an integral type that is narrower than GNU_RANGE_TYPE, - we can't do anything since we might be truncating the bounds. No - check is needed in this case. */ - if (INTEGRAL_TYPE_P (TREE_TYPE (gnu_expr)) - && (TYPE_PRECISION (gnu_compare_type) - < TYPE_PRECISION (get_base_type (gnu_range_type)))) - return gnu_expr; - - /* Checked expressions must be evaluated only once. */ - gnu_expr = make_save_expr (gnu_expr); - - /* There's no good type to use here, so we might as well use - integer_type_node. Note that the form of the check is - (not (expr >= lo)) or (not (expr >= hi)) - the reason for this slightly convoluted form is that NaN's - are not considered to be in range in the float case. */ - return emit_check - (build_binary_op (TRUTH_ORIF_EXPR, integer_type_node, - invert_truthvalue - (build_binary_op (GE_EXPR, integer_type_node, - convert (gnu_compare_type, gnu_expr), - convert (gnu_compare_type, gnu_low))), - invert_truthvalue - (build_binary_op (LE_EXPR, integer_type_node, - convert (gnu_compare_type, gnu_expr), - convert (gnu_compare_type, - gnu_high)))), - gnu_expr); -} - -/* Emit code for an index check. GNU_ARRAY_OBJECT is the array object - which we are about to index, GNU_EXPR is the index expression to be - checked, GNU_LOW and GNU_HIGH are the lower and upper bounds - against which GNU_EXPR has to be checked. Note that for index - checking we cannot use the emit_range_check function (although very - similar code needs to be generated in both cases) since for index - checking the array type against which we are checking the indeces - may be unconstrained and consequently we need to retrieve the - actual index bounds from the array object itself - (GNU_ARRAY_OBJECT). The place where we need to do that is in - subprograms having unconstrained array formal parameters */ - -static tree -emit_index_check (gnu_array_object, gnu_expr, gnu_low, gnu_high) - tree gnu_array_object; - tree gnu_expr; - tree gnu_low; - tree gnu_high; -{ - tree gnu_expr_check; - - /* Checked expressions must be evaluated only once. */ - gnu_expr = make_save_expr (gnu_expr); - - /* Must do this computation in the base type in case the expression's - type is an unsigned subtypes. */ - gnu_expr_check = convert (get_base_type (TREE_TYPE (gnu_expr)), gnu_expr); - - /* If GNU_LOW or GNU_HIGH are a PLACEHOLDER_EXPR, qualify them by - the object we are handling. */ - if (TREE_CODE (gnu_low) != INTEGER_CST && contains_placeholder_p (gnu_low)) - gnu_low = build (WITH_RECORD_EXPR, TREE_TYPE (gnu_low), - gnu_low, gnu_array_object); - - if (TREE_CODE (gnu_high) != INTEGER_CST && contains_placeholder_p (gnu_high)) - gnu_high = build (WITH_RECORD_EXPR, TREE_TYPE (gnu_high), - gnu_high, gnu_array_object); - - /* There's no good type to use here, so we might as well use - integer_type_node. */ - return emit_check - (build_binary_op (TRUTH_ORIF_EXPR, integer_type_node, - build_binary_op (LT_EXPR, integer_type_node, - gnu_expr_check, - convert (TREE_TYPE (gnu_expr_check), - gnu_low)), - build_binary_op (GT_EXPR, integer_type_node, - gnu_expr_check, - convert (TREE_TYPE (gnu_expr_check), - gnu_high))), - gnu_expr); -} - -/* Given GNU_COND which contains the condition corresponding to an access, - discriminant or range check, of value GNU_EXPR, build a COND_EXPR - that returns GNU_EXPR if GNU_COND is false and raises a - CONSTRAINT_ERROR if GNU_COND is true. */ - -static tree -emit_check (gnu_cond, gnu_expr) - tree gnu_cond; - tree gnu_expr; -{ - tree gnu_call; - - gnu_call = build_call_raise (raise_constraint_error_decl); - - /* Use an outer COMPOUND_EXPR to make sure that GNU_EXPR will - get evaluated in front of the comparison in case it ends - up being a SAVE_EXPR. Put the whole thing inside its own - SAVE_EXPR do the inner SAVE_EXPR doesn't leak out. */ - - return make_save_expr (build (COMPOUND_EXPR, TREE_TYPE (gnu_expr), gnu_expr, - fold (build (COND_EXPR, TREE_TYPE (gnu_expr), - gnu_cond, - build (COMPOUND_EXPR, - TREE_TYPE (gnu_expr), - gnu_call, gnu_expr), - gnu_expr)))); -} - -/* Return an expression that converts GNU_EXPR to GNAT_TYPE, doing - overflow checks if OVERFLOW_P is nonzero and range checks if - RANGE_P is nonzero. GNAT_TYPE is known to be an integral type. - If TRUNCATE_P is nonzero, do a float to integer conversion with - truncation; otherwise round. */ - -static tree -convert_with_check (gnat_type, gnu_expr, overflow_p, range_p, truncate_p) - Entity_Id gnat_type; - tree gnu_expr; - int overflow_p; - int range_p; - int truncate_p; -{ - tree gnu_type = get_unpadded_type (gnat_type); - tree gnu_in_type = TREE_TYPE (gnu_expr); - tree gnu_in_basetype = get_base_type (gnu_in_type); - tree gnu_base_type = get_base_type (gnu_type); - tree gnu_ada_base_type = get_ada_base_type (gnu_type); - tree gnu_in_lb = TYPE_MIN_VALUE (gnu_in_basetype); - tree gnu_in_ub = TYPE_MAX_VALUE (gnu_in_basetype); - tree gnu_out_lb = TYPE_MIN_VALUE (gnu_base_type); - tree gnu_out_ub = TYPE_MAX_VALUE (gnu_base_type); - tree gnu_result = gnu_expr; - - /* If we are not doing any checks, the output is an integral type, and - the input is not a floating type, just do the conversion. This - shortcut is required to avoid problems with packed array types - and simplifies code in all cases anyway. */ - if (! range_p && ! overflow_p && INTEGRAL_TYPE_P (gnu_base_type) - && ! FLOAT_TYPE_P (gnu_in_type)) - return convert (gnu_type, gnu_expr); - - /* First convert the expression to its base type. This - will never generate code, but makes the tests below much simpler. - But don't do this if converting from an integer type to an unconstrained - array type since then we need to get the bounds from the original - (unpacked) type. */ - if (TREE_CODE (gnu_type) != UNCONSTRAINED_ARRAY_TYPE) - gnu_result = convert (gnu_in_basetype, gnu_result); - - /* If overflow checks are requested, we need to be sure the result will - fit in the output base type. But don't do this if the input - is integer and the output floating-point. */ - if (overflow_p - && ! (FLOAT_TYPE_P (gnu_base_type) && INTEGRAL_TYPE_P (gnu_in_basetype))) - { - /* Ensure GNU_EXPR only gets evaluated once. */ - tree gnu_input = make_save_expr (gnu_result); - tree gnu_cond = integer_zero_node; - - /* Convert the lower bounds to signed types, so we're sure we're - comparing them properly. Likewise, convert the upper bounds - to unsigned types. */ - if (INTEGRAL_TYPE_P (gnu_in_basetype) && TREE_UNSIGNED (gnu_in_basetype)) - gnu_in_lb = convert (signed_type (gnu_in_basetype), gnu_in_lb); - - if (INTEGRAL_TYPE_P (gnu_in_basetype) - && ! TREE_UNSIGNED (gnu_in_basetype)) - gnu_in_ub = convert (unsigned_type (gnu_in_basetype), gnu_in_ub); - - if (INTEGRAL_TYPE_P (gnu_base_type) && TREE_UNSIGNED (gnu_base_type)) - gnu_out_lb = convert (signed_type (gnu_base_type), gnu_out_lb); - - if (INTEGRAL_TYPE_P (gnu_base_type) && ! TREE_UNSIGNED (gnu_base_type)) - gnu_out_ub = convert (unsigned_type (gnu_base_type), gnu_out_ub); - - /* Check each bound separately and only if the result bound - is tighter than the bound on the input type. Note that all the - types are base types, so the bounds must be constant. Also, - the comparison is done in the base type of the input, which - always has the proper signedness. First check for input - integer (which means output integer), output float (which means - both float), or mixed, in which case we always compare. - Note that we have to do the comparison which would *fail* in the - case of an error since if it's an FP comparison and one of the - values is a NaN or Inf, the comparison will fail. */ - if (INTEGRAL_TYPE_P (gnu_in_basetype) - ? tree_int_cst_lt (gnu_in_lb, gnu_out_lb) - : (FLOAT_TYPE_P (gnu_base_type) - ? REAL_VALUES_LESS (TREE_REAL_CST (gnu_in_lb), - TREE_REAL_CST (gnu_out_lb)) - : 1)) - gnu_cond - = invert_truthvalue - (build_binary_op (GE_EXPR, integer_type_node, - gnu_input, convert (gnu_in_basetype, - gnu_out_lb))); - - if (INTEGRAL_TYPE_P (gnu_in_basetype) - ? tree_int_cst_lt (gnu_out_ub, gnu_in_ub) - : (FLOAT_TYPE_P (gnu_base_type) - ? REAL_VALUES_LESS (TREE_REAL_CST (gnu_out_ub), - TREE_REAL_CST (gnu_in_lb)) - : 1)) - gnu_cond - = build_binary_op (TRUTH_ORIF_EXPR, integer_type_node, gnu_cond, - invert_truthvalue - (build_binary_op (LE_EXPR, integer_type_node, - gnu_input, - convert (gnu_in_basetype, - gnu_out_ub)))); - - if (! integer_zerop (gnu_cond)) - gnu_result = emit_check (gnu_cond, gnu_input); - } - - /* Now convert to the result base type. If this is a non-truncating - float-to-integer conversion, round. */ - if (INTEGRAL_TYPE_P (gnu_ada_base_type) && FLOAT_TYPE_P (gnu_in_basetype) - && ! truncate_p) - { - tree gnu_point_5 = build_real (gnu_in_basetype, dconstp5); - tree gnu_minus_point_5 = build_real (gnu_in_basetype, dconstmp5); - tree gnu_zero = convert (gnu_in_basetype, integer_zero_node); - tree gnu_saved_result = save_expr (gnu_result); - tree gnu_comp = build (GE_EXPR, integer_type_node, - gnu_saved_result, gnu_zero); - tree gnu_adjust = build (COND_EXPR, gnu_in_basetype, gnu_comp, - gnu_point_5, gnu_minus_point_5); - - gnu_result - = build (PLUS_EXPR, gnu_in_basetype, gnu_saved_result, gnu_adjust); - } - - if (TREE_CODE (gnu_ada_base_type) == INTEGER_TYPE - && TYPE_HAS_ACTUAL_BOUNDS_P (gnu_ada_base_type) - && TREE_CODE (gnu_result) == UNCONSTRAINED_ARRAY_REF) - gnu_result = unchecked_convert (gnu_ada_base_type, gnu_result); - else - gnu_result = convert (gnu_ada_base_type, gnu_result); - - /* Finally, do the range check if requested. Note that if the - result type is a modular type, the range check is actually - an overflow check. */ - - if (range_p - || (TREE_CODE (gnu_base_type) == INTEGER_TYPE - && TYPE_MODULAR_P (gnu_base_type) && overflow_p)) - gnu_result = emit_range_check (gnu_result, gnat_type); - - return convert (gnu_type, gnu_result); -} - -/* Return 1 if GNU_EXPR can be directly addressed. This is the case unless - it is an expression involving computation or if it involves a bitfield - reference. This returns the same as mark_addressable in most cases. */ - -static int -addressable_p (gnu_expr) - tree gnu_expr; -{ - switch (TREE_CODE (gnu_expr)) - { - case UNCONSTRAINED_ARRAY_REF: - case INDIRECT_REF: - case VAR_DECL: - case PARM_DECL: - case FUNCTION_DECL: - case RESULT_DECL: - case CONSTRUCTOR: - case NULL_EXPR: - return 1; - - case COMPONENT_REF: - return (! DECL_BIT_FIELD (TREE_OPERAND (gnu_expr, 1)) - && addressable_p (TREE_OPERAND (gnu_expr, 0))); - - case ARRAY_REF: case ARRAY_RANGE_REF: - case REALPART_EXPR: case IMAGPART_EXPR: - case NOP_EXPR: - return addressable_p (TREE_OPERAND (gnu_expr, 0)); - - case CONVERT_EXPR: - return (AGGREGATE_TYPE_P (TREE_TYPE (gnu_expr)) - && addressable_p (TREE_OPERAND (gnu_expr, 0))); - - case UNCHECKED_CONVERT_EXPR: - { - /* This is addressable if the code in gnat_expand_expr can do - it by either just taking the operand or by pointer punning. */ - tree inner = TREE_OPERAND (gnu_expr, 0); - tree type = TREE_TYPE (gnu_expr); - tree inner_type = TREE_TYPE (inner); - - return ((TYPE_MODE (type) == TYPE_MODE (inner_type) - && (TYPE_ALIGN (type) <= TYPE_ALIGN (inner_type) - || TYPE_ALIGN (inner_type) >= BIGGEST_ALIGNMENT)) - || ((TYPE_MODE (type) == BLKmode - || TYPE_MODE (inner_type) == BLKmode) - && (TYPE_ALIGN (type) <= TYPE_ALIGN (inner_type) - || TYPE_ALIGN (inner_type) >= BIGGEST_ALIGNMENT - || TYPE_ALIGN_OK_P (type) - || TYPE_ALIGN_OK_P (inner_type)))); - } - - default: - return 0; - } -} - -/* Do the processing for the declaration of a GNAT_ENTITY, a type. If - a separate Freeze node exists, delay the bulk of the processing. Otherwise - make a GCC type for GNAT_ENTITY and set up the correspondance. */ - -void -process_type (gnat_entity) - Entity_Id gnat_entity; -{ - tree gnu_old - = present_gnu_tree (gnat_entity) ? get_gnu_tree (gnat_entity) : 0; - tree gnu_new; - - /* If we are to delay elaboration of this type, just do any - elaborations needed for expressions within the declaration and - make a dummy type entry for this node and its Full_View (if - any) in case something points to it. Don't do this if it - has already been done (the only way that can happen is if - the private completion is also delayed). */ - if (Present (Freeze_Node (gnat_entity)) - || (IN (Ekind (gnat_entity), Incomplete_Or_Private_Kind) - && Present (Full_View (gnat_entity)) - && Freeze_Node (Full_View (gnat_entity)) - && ! present_gnu_tree (Full_View (gnat_entity)))) - { - elaborate_entity (gnat_entity); - - if (gnu_old == 0) - { - tree gnu_decl = create_type_decl (get_entity_name (gnat_entity), - make_dummy_type (gnat_entity), - 0, 0, 0); - - save_gnu_tree (gnat_entity, gnu_decl, 0); - if (IN (Ekind (gnat_entity), Incomplete_Or_Private_Kind) - && Present (Full_View (gnat_entity))) - save_gnu_tree (Full_View (gnat_entity), gnu_decl, 0); - } - - return; - } - - /* If we saved away a dummy type for this node it means that this - made the type that corresponds to the full type of an incomplete - type. Clear that type for now and then update the type in the - pointers. */ - if (gnu_old != 0) - { - if (TREE_CODE (gnu_old) != TYPE_DECL - || ! TYPE_IS_DUMMY_P (TREE_TYPE (gnu_old))) - { - /* If this was a withed access type, this is not an error - and merely indicates we've already elaborated the type - already. */ - if (Is_Type (gnat_entity) && From_With_Type (gnat_entity)) - return; - - gigi_abort (323); - } - - save_gnu_tree (gnat_entity, NULL_TREE, 0); - } - - /* Now fully elaborate the type. */ - gnu_new = gnat_to_gnu_entity (gnat_entity, NULL_TREE, 1); - if (TREE_CODE (gnu_new) != TYPE_DECL) - gigi_abort (324); - - /* If we have an old type and we've made pointers to this type, - update those pointers. */ - if (gnu_old != 0) - update_pointer_to (TYPE_MAIN_VARIANT (TREE_TYPE (gnu_old)), - TREE_TYPE (gnu_new)); - - /* If this is a record type corresponding to a task or protected type - that is a completion of an incomplete type, perform a similar update - on the type. */ - /* ??? Including protected types here is a guess. */ - - if (IN (Ekind (gnat_entity), Record_Kind) - && Is_Concurrent_Record_Type (gnat_entity) - && present_gnu_tree (Corresponding_Concurrent_Type (gnat_entity))) - { - tree gnu_task_old - = get_gnu_tree (Corresponding_Concurrent_Type (gnat_entity)); - - save_gnu_tree (Corresponding_Concurrent_Type (gnat_entity), - NULL_TREE, 0); - save_gnu_tree (Corresponding_Concurrent_Type (gnat_entity), - gnu_new, 0); - - update_pointer_to (TYPE_MAIN_VARIANT (TREE_TYPE (gnu_task_old)), - TREE_TYPE (gnu_new)); - } -} - -/* GNAT_ASSOC is the front of the Component_Associations of an N_Aggregate. - GNU_TYPE is the GCC type of the corresponding record. - - Return a CONSTRUCTOR to build the record. */ - -static tree -assoc_to_constructor (gnat_assoc, gnu_type) - Node_Id gnat_assoc; - tree gnu_type; -{ - tree gnu_field, gnu_list, gnu_result; - - /* We test for GNU_FIELD being empty in the case where a variant - was the last thing since we don't take things off GNAT_ASSOC in - that case. We check GNAT_ASSOC in case we have a variant, but it - has no fields. */ - - for (gnu_list = NULL_TREE; Present (gnat_assoc); - gnat_assoc = Next (gnat_assoc)) - { - Node_Id gnat_field = First (Choices (gnat_assoc)); - tree gnu_field = gnat_to_gnu_entity (Entity (gnat_field), NULL_TREE, 0); - tree gnu_expr = gnat_to_gnu (Expression (gnat_assoc)); - - /* The expander is supposed to put a single component selector name - in every record component association */ - if (Next (gnat_field)) - gigi_abort (328); - - /* Before assigning a value in an aggregate make sure range checks - are done if required. Then convert to the type of the field. */ - if (Do_Range_Check (Expression (gnat_assoc))) - gnu_expr = emit_range_check (gnu_expr, Etype (gnat_field)); - - gnu_expr = convert (TREE_TYPE (gnu_field), gnu_expr); - - /* Add the field and expression to the list. */ - gnu_list = tree_cons (gnu_field, gnu_expr, gnu_list); - } - - gnu_result = extract_values (gnu_list, gnu_type); - - /* Verify every enty in GNU_LIST was used. */ - for (gnu_field = gnu_list; gnu_field; gnu_field = TREE_CHAIN (gnu_field)) - if (! TREE_ADDRESSABLE (gnu_field)) - gigi_abort (311); - - return gnu_result; -} - -/* Builds a possibly nested constructor for array aggregates. GNAT_EXPR - is the first element of an array aggregate. It may itself be an - aggregate (an array or record aggregate). GNU_ARRAY_TYPE is the gnu type - corresponding to the array aggregate. GNAT_COMPONENT_TYPE is the type - of the array component. It is needed for range checking. */ - -static tree -pos_to_constructor (gnat_expr, gnu_array_type, gnat_component_type) - Node_Id gnat_expr; - tree gnu_array_type; - Entity_Id gnat_component_type; -{ - tree gnu_expr; - tree gnu_expr_list = NULL_TREE; - - for ( ; Present (gnat_expr); gnat_expr = Next (gnat_expr)) - { - /* If the expression is itself an array aggregate then first build the - innermost constructor if it is part of our array (multi-dimensional - case). */ - - if (Nkind (gnat_expr) == N_Aggregate - && TREE_CODE (TREE_TYPE (gnu_array_type)) == ARRAY_TYPE - && TYPE_MULTI_ARRAY_P (TREE_TYPE (gnu_array_type))) - gnu_expr = pos_to_constructor (First (Expressions (gnat_expr)), - TREE_TYPE (gnu_array_type), - gnat_component_type); - else - { - gnu_expr = gnat_to_gnu (gnat_expr); - - /* before assigning the element to the array make sure it is - in range */ - if (Do_Range_Check (gnat_expr)) - gnu_expr = emit_range_check (gnu_expr, gnat_component_type); - } - - gnu_expr_list - = tree_cons (NULL_TREE, convert (TREE_TYPE (gnu_array_type), gnu_expr), - gnu_expr_list); - } - - return build_constructor (gnu_array_type, nreverse (gnu_expr_list)); -} - -/* Subroutine of assoc_to_constructor: VALUES is a list of field associations, - some of which are from RECORD_TYPE. Return a CONSTRUCTOR consisting - of the associations that are from RECORD_TYPE. If we see an internal - record, make a recursive call to fill it in as well. */ - -static tree -extract_values (values, record_type) - tree values; - tree record_type; -{ - tree result = NULL_TREE; - tree field, tem; - - for (field = TYPE_FIELDS (record_type); field; field = TREE_CHAIN (field)) - { - tree value = 0; - - /* _Parent is an internal field, but may have values in the aggregate, - so check for values first. */ - if ((tem = purpose_member (field, values)) != 0) - { - value = TREE_VALUE (tem); - TREE_ADDRESSABLE (tem) = 1; - } - - else if (DECL_INTERNAL_P (field)) - { - value = extract_values (values, TREE_TYPE (field)); - if (TREE_CODE (value) == CONSTRUCTOR - && CONSTRUCTOR_ELTS (value) == 0) - value = 0; - } - else - /* If we have a record subtype, the names will match, but not the - actual FIELD_DECLs. */ - for (tem = values; tem; tem = TREE_CHAIN (tem)) - if (DECL_NAME (TREE_PURPOSE (tem)) == DECL_NAME (field)) - { - value = convert (TREE_TYPE (field), TREE_VALUE (tem)); - TREE_ADDRESSABLE (tem) = 1; - } - - if (value == 0) - continue; - - result = tree_cons (field, value, result); - } - - return build_constructor (record_type, nreverse (result)); -} - -/* EXP is to be treated as an array or record. Handle the cases when it is - an access object and perform the required dereferences. */ - -static tree -maybe_implicit_deref (exp) - tree exp; -{ - /* If the type is a pointer, dereference it. */ - - if (POINTER_TYPE_P (TREE_TYPE (exp)) || TYPE_FAT_POINTER_P (TREE_TYPE (exp))) - exp = build_unary_op (INDIRECT_REF, NULL_TREE, exp); - - /* If we got a padded type, remove it too. */ - if (TREE_CODE (TREE_TYPE (exp)) == RECORD_TYPE - && TYPE_IS_PADDING_P (TREE_TYPE (exp))) - exp = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (exp))), exp); - - return exp; -} - -/* Surround EXP with a SAVE_EXPR, but handle unconstrained objects specially - since it doesn't make any sense to put them in a SAVE_EXPR. */ - -tree -make_save_expr (exp) - tree exp; -{ - tree type = TREE_TYPE (exp); - - /* If this is an unchecked conversion, save the input since we may need to - handle this expression separately if it's the operand of a component - reference. */ - if (TREE_CODE (exp) == UNCHECKED_CONVERT_EXPR) - return build1 (UNCHECKED_CONVERT_EXPR, type, - make_save_expr (TREE_OPERAND (exp, 0))); - - /* If this is an aggregate type, we may be doing a dereference of it in - the LHS side of an assignment. In that case, we need to evaluate - it , take its address, make a SAVE_EXPR of that, then do the indirect - reference. Note that for an unconstrained array, the effect will be - to make a SAVE_EXPR of the fat pointer. - - ??? This is an efficiency problem in the case of a type that can be - placed into memory, but until we can deal with the LHS issue, - we have to take that hit. This really should test for BLKmode. */ - else if (TREE_CODE (type) == UNCONSTRAINED_ARRAY_TYPE - || (AGGREGATE_TYPE_P (type) && ! TYPE_FAT_POINTER_P (type))) - return - build_unary_op (INDIRECT_REF, type, - save_expr (build_unary_op (ADDR_EXPR, - build_reference_type (type), - exp))); - - /* Otherwise, just do the usual thing. */ - return save_expr (exp); -} - -/* This is equivalent to stabilize_reference in GCC's tree.c, but we know - how to handle our new nodes and we take an extra argument that says - whether to force evaluation of everything. */ - -tree -gnat_stabilize_reference (ref, force) - tree ref; - int force; -{ - register tree type = TREE_TYPE (ref); - register enum tree_code code = TREE_CODE (ref); - register tree result; - - switch (code) - { - case VAR_DECL: - case PARM_DECL: - case RESULT_DECL: - /* No action is needed in this case. */ - return ref; - - case NOP_EXPR: - case CONVERT_EXPR: - case FLOAT_EXPR: - case FIX_TRUNC_EXPR: - case FIX_FLOOR_EXPR: - case FIX_ROUND_EXPR: - case FIX_CEIL_EXPR: - case UNCHECKED_CONVERT_EXPR: - case ADDR_EXPR: - result - = build1 (code, type, - gnat_stabilize_reference (TREE_OPERAND (ref, 0), force)); - break; - - case INDIRECT_REF: - case UNCONSTRAINED_ARRAY_REF: - result = build1 (code, type, - gnat_stabilize_reference_1 (TREE_OPERAND (ref, 0), - force)); - break; - - case COMPONENT_REF: - result = build (COMPONENT_REF, type, - gnat_stabilize_reference (TREE_OPERAND (ref, 0), - force), - TREE_OPERAND (ref, 1)); - break; - - case BIT_FIELD_REF: - result = build (BIT_FIELD_REF, type, - gnat_stabilize_reference (TREE_OPERAND (ref, 0), force), - gnat_stabilize_reference_1 (TREE_OPERAND (ref, 1), - force), - gnat_stabilize_reference_1 (TREE_OPERAND (ref, 2), - force)); - break; - - case ARRAY_REF: - result = build (ARRAY_REF, type, - gnat_stabilize_reference (TREE_OPERAND (ref, 0), force), - gnat_stabilize_reference_1 (TREE_OPERAND (ref, 1), - force)); - break; - - case ARRAY_RANGE_REF: - result = build (ARRAY_RANGE_REF, type, - gnat_stabilize_reference (TREE_OPERAND (ref, 0), force), - gnat_stabilize_reference_1 (TREE_OPERAND (ref, 1), - force)); - break; - - case COMPOUND_EXPR: - result = build (COMPOUND_EXPR, type, - gnat_stabilize_reference_1 (TREE_OPERAND (ref, 0), - force), - gnat_stabilize_reference (TREE_OPERAND (ref, 1), - force)); - break; - - case RTL_EXPR: - result = build1 (INDIRECT_REF, type, - save_expr (build1 (ADDR_EXPR, - build_reference_type (type), ref))); - break; - - /* If arg isn't a kind of lvalue we recognize, make no change. - Caller should recognize the error for an invalid lvalue. */ - default: - return ref; - - case ERROR_MARK: - return error_mark_node; - } - - TREE_READONLY (result) = TREE_READONLY (ref); - return result; -} - -/* Similar to stabilize_reference_1 in tree.c, but supports an extra - arg to force a SAVE_EXPR for everything. */ - -static tree -gnat_stabilize_reference_1 (e, force) - tree e; - int force; -{ - register enum tree_code code = TREE_CODE (e); - register tree type = TREE_TYPE (e); - register tree result; - - /* We cannot ignore const expressions because it might be a reference - to a const array but whose index contains side-effects. But we can - ignore things that are actual constant or that already have been - handled by this function. */ - - if (TREE_CONSTANT (e) || code == SAVE_EXPR) - return e; - - switch (TREE_CODE_CLASS (code)) - { - case 'x': - case 't': - case 'd': - case 'b': - case '<': - case 's': - case 'e': - case 'r': - if (TREE_SIDE_EFFECTS (e) || force) - return save_expr (e); - return e; - - case 'c': - /* Constants need no processing. In fact, we should never reach - here. */ - return e; - - case '2': - /* Division is slow and tends to be compiled with jumps, - especially the division by powers of 2 that is often - found inside of an array reference. So do it just once. */ - if (code == TRUNC_DIV_EXPR || code == TRUNC_MOD_EXPR - || code == FLOOR_DIV_EXPR || code == FLOOR_MOD_EXPR - || code == CEIL_DIV_EXPR || code == CEIL_MOD_EXPR - || code == ROUND_DIV_EXPR || code == ROUND_MOD_EXPR) - return save_expr (e); - /* Recursively stabilize each operand. */ - result = build (code, type, - gnat_stabilize_reference_1 (TREE_OPERAND (e, 0), force), - gnat_stabilize_reference_1 (TREE_OPERAND (e, 1), force)); - break; - - case '1': - /* Recursively stabilize each operand. */ - result = build1 (code, type, - gnat_stabilize_reference_1 (TREE_OPERAND (e, 0), - force)); - break; - - default: - abort (); - } - - TREE_READONLY (result) = TREE_READONLY (e); - return result; -} - -/* GNAT_UNIT is the Defining_Identifier for some package or subprogram, - either a spec or a body, BODY_P says which. If needed, make a function - to be the elaboration routine for that object and perform the elaborations - in GNU_ELAB_LIST. - - Return 1 if we didn't need an elaboration function, zero otherwise. */ - -static int -build_unit_elab (gnat_unit, body_p, gnu_elab_list) - Entity_Id gnat_unit; - int body_p; - tree gnu_elab_list; -{ - tree gnu_decl; - rtx insn; - int result = 1; - - /* If we have nothing to do, return. */ - if (gnu_elab_list == 0) - return 1; - - /* Set our file and line number to that of the object and set up the - elaboration routine. */ - gnu_decl = create_subprog_decl (create_concat_name (gnat_unit, - body_p ? - "elabb" : "elabs"), - NULL_TREE, void_ftype, NULL_TREE, 0, 1, 0, - 0); - DECL_ELABORATION_PROC_P (gnu_decl) = 1; - - begin_subprog_body (gnu_decl); - set_lineno (gnat_unit, 1); - pushlevel (0); - gnu_block_stack = tree_cons (NULL_TREE, NULL_TREE, gnu_block_stack); - expand_start_bindings (0); - - /* Emit the assignments for the elaborations we have to do. If there - is no destination, this is just a call to execute some statement - that was placed within the declarative region. But first save a - pointer so we can see if any insns were generated. */ - - insn = get_last_insn (); - - for (; gnu_elab_list; gnu_elab_list = TREE_CHAIN (gnu_elab_list)) - if (TREE_PURPOSE (gnu_elab_list) == NULL_TREE) - { - if (TREE_VALUE (gnu_elab_list) != 0) - expand_expr_stmt (TREE_VALUE (gnu_elab_list)); - } - else - { - tree lhs = TREE_PURPOSE (gnu_elab_list); - - input_filename = DECL_SOURCE_FILE (lhs); - lineno = DECL_SOURCE_LINE (lhs); - - /* If LHS has a padded type, convert it to the unpadded type - so the assignment is done properly. */ - if (TREE_CODE (TREE_TYPE (lhs)) == RECORD_TYPE - && TYPE_IS_PADDING_P (TREE_TYPE (lhs))) - lhs = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (lhs))), lhs); - - emit_line_note (input_filename, lineno); - expand_expr_stmt (build_binary_op (MODIFY_EXPR, NULL_TREE, - TREE_PURPOSE (gnu_elab_list), - TREE_VALUE (gnu_elab_list))); - } - - /* See if any non-NOTE insns were generated. */ - for (insn = NEXT_INSN (insn); insn; insn = NEXT_INSN (insn)) - if (GET_RTX_CLASS (GET_CODE (insn)) == 'i') - { - result = 0; - break; - } - - expand_end_bindings (getdecls (), kept_level_p (), 0); - poplevel (kept_level_p (), 1, 0); - gnu_block_stack = TREE_CHAIN (gnu_block_stack); - end_subprog_body (); - - /* If there were no insns, we don't need an elab routine. It would - be nice to not output this one, but there's no good way to do that. */ - return result; -} - -extern char *__gnat_to_canonical_file_spec PARAMS ((char *)); - -/* Determine the input_filename and the lineno from the source location - (Sloc) of GNAT_NODE node. Set the global variable input_filename and - lineno. If WRITE_NOTE_P is true, emit a line number note. */ - -void -set_lineno (gnat_node, write_note_p) - Node_Id gnat_node; - int write_note_p; -{ - Source_Ptr source_location = Sloc (gnat_node); - - /* If node not from source code, ignore. */ - if (source_location < 0) - return; - - /* Use the identifier table to make a hashed, permanent copy of the filename, - since the name table gets reallocated after Gigi returns but before all - the debugging information is output. The call to - __gnat_to_canonical_file_spec translates filenames from pragmas - Source_Reference that contain host style syntax not understood by gdb. */ - input_filename - = IDENTIFIER_POINTER - (get_identifier - (__gnat_to_canonical_file_spec - (Get_Name_String - (Debug_Source_Name (Get_Source_File_Index (source_location)))))); - - /* ref_filename is the reference file name as given by sinput (i.e no - directory) */ - ref_filename - = IDENTIFIER_POINTER - (get_identifier - (Get_Name_String - (Reference_Name (Get_Source_File_Index (source_location)))));; - lineno = Get_Logical_Line_Number (source_location); - - if (write_note_p) - emit_line_note (input_filename, lineno); -} - -/* Post an error message. MSG is the error message, properly annotated. - NODE is the node at which to post the error and the node to use for the - "&" substitution. */ - -void -post_error (msg, node) - const char *msg; - Node_Id node; -{ - String_Template temp; - Fat_Pointer fp; - - temp.Low_Bound = 1, temp.High_Bound = strlen (msg); - fp.Array = msg, fp.Bounds = &temp; - if (Present (node)) - Error_Msg_N (fp, node); -} - -/* Similar, but NODE is the node at which to post the error and ENT - is the node to use for the "&" substitution. */ - -void -post_error_ne (msg, node, ent) - const char *msg; - Node_Id node; - Entity_Id ent; -{ - String_Template temp; - Fat_Pointer fp; - - temp.Low_Bound = 1, temp.High_Bound = strlen (msg); - fp.Array = msg, fp.Bounds = &temp; - if (Present (node)) - Error_Msg_NE (fp, node, ent); -} - -/* Similar, but NODE is the node at which to post the error, ENT is the node - to use for the "&" substitution, and N is the number to use for the ^. */ - -void -post_error_ne_num (msg, node, ent, n) - const char *msg; - Node_Id node; - Entity_Id ent; - int n; -{ - String_Template temp; - Fat_Pointer fp; - - temp.Low_Bound = 1, temp.High_Bound = strlen (msg); - fp.Array = msg, fp.Bounds = &temp; - Error_Msg_Uint_1 = UI_From_Int (n); - - if (Present (node)) - Error_Msg_NE (fp, node, ent); -} - -/* Similar to post_error_ne_num, but T is a GCC tree representing the - number to write. If the tree represents a constant that fits within - a host integer, the text inside curly brackets in MSG will be output - (presumably including a '^'). Otherwise that text will not be output - and the text inside square brackets will be output instead. */ - -void -post_error_ne_tree (msg, node, ent, t) - const char *msg; - Node_Id node; - Entity_Id ent; - tree t; -{ - char *newmsg = alloca (strlen (msg) + 1); - String_Template temp = {1, 0}; - Fat_Pointer fp; - char start_yes, end_yes, start_no, end_no; - const char *p; - char *q; - - fp.Array = newmsg, fp.Bounds = &temp; - - if (host_integerp (t, 1) -#if HOST_BITS_PER_WIDE_INT > HOST_BITS_PER_INT - && compare_tree_int (t, 1 << (HOST_BITS_PER_INT - 2)) < 0 -#endif - ) - { - Error_Msg_Uint_1 = UI_From_Int (tree_low_cst (t, 1)); - start_yes = '{', end_yes = '}', start_no = '[', end_no = ']'; - } - else - start_yes = '[', end_yes = ']', start_no = '{', end_no = '}'; - - for (p = msg, q = newmsg; *p != 0; p++) - { - if (*p == start_yes) - for (p++; *p != end_yes; p++) - *q++ = *p; - else if (*p == start_no) - for (p++; *p != end_no; p++) - ; - else - *q++ = *p; - } - - *q = 0; - - temp.High_Bound = strlen (newmsg); - if (Present (node)) - Error_Msg_NE (fp, node, ent); -} - -/* Similar to post_error_ne_tree, except that NUM is a second - integer to write in the message. */ - -void -post_error_ne_tree_2 (msg, node, ent, t, num) - const char *msg; - Node_Id node; - Entity_Id ent; - tree t; - int num; -{ - Error_Msg_Uint_2 = UI_From_Int (num); - post_error_ne_tree (msg, node, ent, t); -} - -/* Set the node for a second '&' in the error message. */ - -void -set_second_error_entity (e) - Entity_Id e; -{ - Error_Msg_Node_2 = e; -} - -/* Signal abort, with "Gigi abort" as the error label, and error_gnat_node - as the relevant node that provides the location info for the error */ - -void -gigi_abort (code) - int code; -{ - String_Template temp = {1, 10}; - Fat_Pointer fp; - - fp.Array = "Gigi abort", fp.Bounds = &temp; - - Current_Error_Node = error_gnat_node; - Compiler_Abort (fp, code); -} - -/* Initialize the table that maps GNAT codes to GCC codes for simple - binary and unary operations. */ - -void -init_code_table () -{ - gnu_codes[N_And_Then] = TRUTH_ANDIF_EXPR; - gnu_codes[N_Or_Else] = TRUTH_ORIF_EXPR; - - gnu_codes[N_Op_And] = TRUTH_AND_EXPR; - gnu_codes[N_Op_Or] = TRUTH_OR_EXPR; - gnu_codes[N_Op_Xor] = TRUTH_XOR_EXPR; - gnu_codes[N_Op_Eq] = EQ_EXPR; - gnu_codes[N_Op_Ne] = NE_EXPR; - gnu_codes[N_Op_Lt] = LT_EXPR; - gnu_codes[N_Op_Le] = LE_EXPR; - gnu_codes[N_Op_Gt] = GT_EXPR; - gnu_codes[N_Op_Ge] = GE_EXPR; - gnu_codes[N_Op_Add] = PLUS_EXPR; - gnu_codes[N_Op_Subtract] = MINUS_EXPR; - gnu_codes[N_Op_Multiply] = MULT_EXPR; - gnu_codes[N_Op_Mod] = FLOOR_MOD_EXPR; - gnu_codes[N_Op_Rem] = TRUNC_MOD_EXPR; - gnu_codes[N_Op_Minus] = NEGATE_EXPR; - gnu_codes[N_Op_Abs] = ABS_EXPR; - gnu_codes[N_Op_Not] = TRUTH_NOT_EXPR; - gnu_codes[N_Op_Rotate_Left] = LROTATE_EXPR; - gnu_codes[N_Op_Rotate_Right] = RROTATE_EXPR; - gnu_codes[N_Op_Shift_Left] = LSHIFT_EXPR; - gnu_codes[N_Op_Shift_Right] = RSHIFT_EXPR; - gnu_codes[N_Op_Shift_Right_Arithmetic] = RSHIFT_EXPR; -}