[Ada] Always do range check against 'First

[gcc.git] / gcc / ada / ChangeLog

2018-05-29  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>

        * exp_ch4.adb (Expand_N_Op_Abs): Always do range check against 'First.

2018-05-29  Eric Botcazou  <ebotcazou@adacore.com>

        * repinfo.adb (List_Entities): Do not list the Linker_Section for
        subprograms here...
        (List_Mechanisms): ...but here instead.  Use consistent name output
        and formatting conventions.

2018-05-29  Bob Duff  <duff@adacore.com>

        * lib-writ.adb (Write_ALI): Cleanup: avoid use of global var; call new
        To_Lower function.
        * libgnat/s-casuti.ads, libgnat/s-casuti.adb (To_Upper, To_Lower,
        To_Mixed): New functions.
        * osint.adb: Cleanup: use Is_Directory_Separator, which correctly
        allows both '\' and '/' on Windows.

2018-05-28  Eric Botcazou  <ebotcazou@adacore.com>

        * repinfo.ads: Minor fixes and tweaks in comments.

2018-05-28  Eric Botcazou  <ebotcazou@adacore.com>

        * repinfo.adb (List_GCC_Expression): Remove Valop and replace calls to
        it with calls to Unop.

2018-05-28  Eric Botcazou  <ebotcazou@adacore.com>

        * repinfo.ads (TCode): Adjust range.
        (Truth_Andif_Expr): Remove.
        (Truth_Orif_Expr): Likewise.
        (Truth_And_Expr .. Dynamic_Val): Adjust value.
        * repinfo.adb (Print_Expr): Remove handling of Truth_{And,Or}if_Expr.
        (Rep_Value): Likewise.
        * repinfo.h (Truth_Andif_Expr): Remove.
        (Truth_Orif_Expr): Likewise.
        (Truth_And_Expr .. Dynamic_Val): Adjust value.
        * gcc-interface/decl.c (annotate_value) <TRUTH_ANDIF_EXPR>: Fall
        through to TRUTH_AND_EXPR case.
        <TRUTH_ORIF_EXPR>: Fall through to TRUTH_OR_EXPR case.

2018-05-28  Ed Schonberg  <schonberg@adacore.com>

        * exp_unst.adb (Visit_Node): For indexed components and attribute
        references, examine index expressions or associated expressions as well
        to record uplevel references.
        (Vist_Node): For function and procedure calls, if a formal is an
        unconstrained array and the actual is constrained, check whether bounds
        of actual have uplevel references.

2018-05-28  Ed Schonberg  <schonberg@adacore.com>

        * einfo.ads, einfo.adb: Exceptions can be uplevel references, and thus
        they can appear as components of activation records.
        * exp_unst.adb (Visit_Node): A reference to an exception may be an
        uplevel reference.

2018-05-28  Eric Botcazou  <ebotcazou@adacore.com>

        * exp_ch4.adb (Expand_Composite_Equality): Compute whether the size
        depends on a discriminant manually instead of using the predicate
        Size_Depends_On_Discriminant in the array type case.

2018-05-28  Ed Schonberg  <schonberg@adacore.com>

        * exp_unst.adb (Check_Static_Type): For a record subtype, check
        discriminant constraints as well.
        (Visit_Node): For a selected component, check type of prefix, as is
        done for indexed components and slices.

2018-05-28  Javier Miranda  <miranda@adacore.com>

        * exp_ch4.adb (Real_Range_Check): Add a temporary to store the integer
        value when converting a float value to a fixed-point value. This is
        required for CCG because it handles fixed-point types by means of
        unsigned integer type variables. The range check is now performed using
        the integer value stored in this temporary.

2018-05-28  Yannick Moy  <moy@adacore.com>

        * sem_util.adb (Is_OK_Volatile_Context): Add attributes First, Last and
        Length as valid non-interfering contexts for SPARK.

2018-05-28  Claire Dross  <dross@adacore.com>

        * sem_disp.ads, sem_disp.adb (Inheritance_Utilities): Package for
        generic inheritance utilities.
        (Generic_Inherited_Subprograms): Generic version of
        Inherited_Subprograms, generic in Find_Dispatching_Type function.
        (Generic_Is_Overriding_Subprogram): Generic version of
        Is_Overriding_Subprogram, generic in Find_Dispatching_Type function.
        (Inherited_Subprograms): Instance of Generic_Inherited_Subprograms with
        Sem_Disp.Find_Dispatching_Type.
        (Is_Overriding_Subprogram): Instance of
        Generic_Is_Overriding_Subprogram with Sem_Disp.Find_Dispatching_Type.
        (Inheritance_Utilities_Inst): Instance of Inheritance_Utilities
        with Sem_Disp.Find_Dispatching_Type.

2018-05-28  Eric Botcazou  <ebotcazou@adacore.com>

        * exp_ch4.adb (Expand_Composite_Equality): For a composite (or FP)
        component type, do not expand array equality using the unconstrained
        base type, except for the case where the bounds of the type depend on a
        discriminant.

2018-05-28  Ed Schonberg  <schonberg@adacore.com>

        * einfo.ads, einfo.adb (Needs_Activation_Record): New flag on
        access-to-subprogram types, to indicate that an indirect call through
        such a type requires an activation record when compiling for LLVM.
        * sem_ch3.adb (Access_Subprogram_Declaration): Set new flag as needed.

2018-05-28  Ed Schonberg  <schonberg@adacore.com>

        * exp_ch4.adb (Real_Range_Check): Specialize float-to-fixed conversions
        when bounds of fixed type are static, to remove some spuerfluous
        implicit conversions and provide an accurate result when converting
        back and forth between the fixed point type and a floating point type.

2018-05-28  Ed Schonberg  <schonberg@adacore.com>

        * exp_unst.adb (Unnest_Subprogram): Prevent creation of empty
        activation records.

2018-05-28  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>

        * exp_unst.adb (Check_Static_Type): Add argument to indicate node to be
        replaced, if any; all callers changed.
        (Note_Uplevel_Ref): Likewise.  Also replace reference to deferred
        constant with private view so we take the address of that entity.
        (Note_Uplevel_Bound): Add argument to indicate node to be replaced, if
        any; all callers changed.  Handle N_Indexed_Component like
        N_Attribute_Reference.  Add N_Type_Conversion case.
        (Visit_Node): Indexed references can be uplevel if the type isn't
        static.
        (Unnest_Subprograms): Don't rewrite if no reference given.  If call has
        been relocated, set first_named pointer in original node as well.

2018-05-28  Ed Schonberg  <schonberg@adacore.com>

        * exp_aggr.adb (Flatten): Copy tree of expression in a component
        association with a range or a set of discrete choices, rather than
        relocating the node. This avoids inconsistencies in the tree when
        handling nested subprograms with uplevel references for LLVM.

2018-05-28  Arnaud Charlet  <charlet@adacore.com>

        * exp_util.adb (Possible_Bit_Aligned_Component): Always return False in
        codepeer mode.

2018-05-28  Arnaud Charlet  <charlet@adacore.com>

        * exp_unst.adb: Fix typo.

2018-05-28  Bob Duff  <duff@adacore.com>

        * libgnat/a-convec.adb (Query_Element): Minor cleanup: remove an
        unnecessary use of 'Unrestricted_Access.

2018-05-28  Hristian Kirtchev  <kirtchev@adacore.com>

        * repinfo.adb (Expr_Value_S): New routine.
        (List_Linker_Section): Properly extract the value of the section
        argument.

2018-05-28  Patrick Bernardi  <bernardi@adacore.com>

        * doc/gnat_ugn/building_executable_programs_with_gnat.rst: Update the
        description of the -D binder switch to reflect current usage.
        * gnat_ugn.texi: Regenerate.

2018-05-28  Gary Dismukes  <dismukes@adacore.com>

        * exp_ch3.adb: Minor reformatting

2018-05-28  Justin Squirek  <squirek@adacore.com>

        * exp_ch3.adb
        (Build_Initialization_Call): Add logic to pass the appropriate actual to match
         new formal.
        (Init_Formals): Add new formal *_skip_null_excluding_check
        * exp_util.adb, exp_util.ads
        (Enclosing_Init_Proc): Added to fetch the enclosing Init_Proc from the current
         scope.
        (Inside_Init_Proc): Refactored to use Enclosing_Init_Proc
        (Needs_Conditional_Null_Excluding_Check): Added to factorize the predicate
         used to determine how to generate an Init_Proc for a given type.
        (Needs_Constant_Address): Minor reformatting
        * sem_res.adb
        (Resolve_Null): Add logic to generate a conditional check in certain cases

2018-05-28  Hristian Kirtchev  <kirtchev@adacore.com>

        * exp_aggr.adb, gnatlink.adb, sem_ch6.adb, sem_res.adb, sem_util.adb:
        Minor reformatting.

2018-05-28  Hristian Kirtchev  <kirtchev@adacore.com>

        * sem_prag.adb (Process_Atomic_Independent_Shared_Volatile): Include
        the declarations of single concurrent types because they fall in the
        category of full type and object declarations.

2018-05-28  Eric Botcazou  <ebotcazou@adacore.com>

        * repinfo.adb (Compute_Max_Length): Skip _Parent component.
        (List_Record_Layout): Likewise.

2018-05-28  Ed Schonberg  <schonberg@adacore.com>

        * sem_util.adb (Is_Function_Result): Add a warning if a postcondition
        includes a call to function to which it applies. This may mean an
        omission of an attribute reference 'Result, in particular if the
        function is pqrameterless.

2018-05-28  Justin Squirek  <squirek@adacore.com>

        * sem_ch8.adb (Find_Expanded_Name): Add extra guard to make sure the
        misresolved package name is not a case of mistaken identity.

2018-05-28  Yannick Moy  <moy@adacore.com>

        * sem_res.adb (Resolve_Range): Re-resolve the low bound of a range in
        GNATprove mode, as the order of resolution (low then high) means that
        all the information is not available when resolving the low bound the
        first time.

2018-05-28  Eric Botcazou  <ebotcazou@adacore.com>

        * repinfo.adb (List_Array_Info): Start with an explicit blank line and
        end with the linker section, if any.
        (List_Entities): Do not output the linker section for record types,
        array types and variables.
        (Print_Expr): Factor out common processing for unary operators and
        special values.  Adjust and reorder the various cases.
        (List_Object_Info): End with the linker section, if any.
        (List_Record_Info): Likewise.
        (List_Type_Info): Do not start with a blank line.

2018-05-25  Nicolas Roche  <roche@adacore.com>

        * libgnat/s-valrea.adb (Scan_Real): Abort computation once it is sure
        that the result will be either -infinite or +infinite.

2018-05-25  Patrick Bernardi  <bernardi@adacore.com>

        * libgnat/s-parame.ads, libgnat/s-parame__vxworks.ads,
        libgnat/s-parame__ae653.ads, libgnat/s-parame__hpux.ads (Size_Type):
        Expand range of type to match the address space of the target.
        (Task_Storage_Size): Remove unused type.

2018-05-25  Ed Schonberg  <schonberg@adacore.com>

        * sem_res.adb (Set_Mixed_Mode_Operand): If the operand is an expression
        of a fixed point type and the parent is a multiplying operation,
        resolve the operand with its own type because the context will impose a
        resulting type on the result of the multiplication by means of
        approriate conversion.

2018-05-25  Hristian Kirtchev  <kirtchev@adacore.com>

        * exp_ch3.adb (Default_Initialize_Object): Ensure that the analysis of
        the in-place initialization aggregate created for pragmas
        Initialize_Scalars or Normalize_Scalars is performed with checks
        suppressed.

2018-05-25  Arnaud Charlet  <charlet@adacore.com>

        * exp_aggr.adb (Convert_To_Positional): Bump default for
        Max_Others_Replicate to 32. Update comments.
        * osint.ads (Unknown_Attributes): No longer pretend this is a constant.
        (No_File_Info_Cache): Initialize separately.
        * osint.adb (No_File_Info_Cache): Update initializer.

2018-05-25  Javier Miranda  <miranda@adacore.com>

        * sem_res.adb (Resolve_Membership_Op): Allow the use of the membership
        test when the left operand is a class-wide interface and the right
        operand is not a class-wide type.
        * exp_ch4.adb (Tagged_Membership): Adding support for interface as the
        left operand.

2018-05-25  Ed Schonberg  <schonberg@adacore.com>

        * exp_aggr.adb (Flatten): A quantified expression cannot be duplicated
        in an others clause to prevent visibility issues with the generated
        loop variable.
        (Component_OK_For_Backend): Return false for a quantified expression.
        (Check_Static_Component): Ditto.

2018-05-25  Hristian Kirtchev  <kirtchev@adacore.com>

        * libgnat/s-secsta.adb (SS_Allocate): Reimplemented.
        (SS_Allocate_Dynamic): New routine. The allocation logic is now split
        into three distring cases rather than in one loop which attempts to
        handle all three cases. This rewrite eliminates an issue where the last
        frame of the stack cannot be freed, thus causing the memory range of a
        new frame to approach the overflow point of the memory index type.
        Since the overflow is logically treated as a
        too-much-memory-on-the-stack scenario, it causes a bogus Storage_Error.
        (SS_Allocate_Static): New routine. The routine factorizes the static
        secondary stack-related code from the former SS_Allocate.

2018-05-25  Sergey Rybin  <rybin@adacore.com>

        * doc/gnat_ugn/gnat_and_program_execution.rst: Add description of '-U'
        option for gnatelim.

2018-05-25  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch6.adb (Analyze_Subprogram_Body_Helper): Do not create
        Class_Wide_Clone_Body when analyzing a subprogram_body_stub: the clone
        is created when the proper body of the stub is analyzed.
        * sem_util.adb (ZBuild_Class_Wide_Clone_Body): If the subprogram body
        is the proper body of a subunit, the cloned body must be inserted in
        the declarative list that contains the stub.

2018-05-25  Justin Squirek  <squirek@adacore.com>

        * exp_ch6.adb (Expand_Simple_Function_Return): Add guard in check to
        generate code for 6.5(8-10) so that we don't get an assertion error
        when dealing with an incomplete return type.

2018-05-25  Arnaud Charlet  <charlet@adacore.com>

        * pprint.adb (Expression_Name): Strip too long expressions to avoid
        carrying very large strings.

2018-05-25  Patrick Bernardi  <bernardi@adacore.com>

        * switch-b.adb (Scan_Binder_Switches): binder switch -Q accepts Natural
        numbers.

2018-05-25  Doug Rupp  <rupp@adacore.com>

        * tracebak.c (aarch64-linux): Implement.

2018-05-25  Justin Squirek  <squirek@adacore.com>

        * sem_ch8.adb: Minor reformatting.

2018-05-25  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.adb (Iterate_Call_Parameters): Fix code convention and
        assertions.

2018-05-25  Hristian Kirtchev  <kirtchev@adacore.com>

        * einfo.adb, einfo.ads, exp_ch3.adb, exp_ch8.adb, exp_unst.adb,
        pprint.adb, sem_ch12.adb, sem_ch3.adb, sem_prag.adb, sem_util.adb:
        Minor reformatting.

2018-05-25  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch12.adb (Instance_Exists): New function, subsidiary of
        Validate_Derived_Type_Instance, to verify that all interfaces
        implemented by the formal type are also implemented by the actual. The
        verification is complicated when an interface of the formal is declared
        in a generic unit and the actual is declared in an instance of it.
        There is currently no mechanism to relate an interface declared within
        a generic to the corresponding interface in an instance, so we must
        traverse the list of interfaces of the actual, looking for a name
        match, and verifying that that interface is declared in an instance.

2018-05-25  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.adb (Iterate_Call_Parameters): Rewrite with extra
        assertions; replace function versions of Next_Formal/Next_Actual with
        their procedural versions (which are more concise).

2018-05-25  Doug Rupp  <rupp@adacore.com>

        * libgnarl/s-osinte__aix.ads, libgnarl/s-osinte__android.ads,
        libgnarl/s-osinte__darwin.ads, libgnarl/s-osinte__freebsd.ads,
        libgnarl/s-osinte__hpux.ads, libgnarl/s-osinte__kfreebsd-gnu.ads,
        libgnarl/s-osinte__linux.ads, libgnarl/s-osinte__lynxos178e.ads,
        libgnarl/s-osinte__qnx.ads, libgnarl/s-osinte__rtems.ads
        (Relative_Timed_Wait): Remove.
        * libgnarl/s-tpopmo.adb (Timed_Sleep, Timed_Delay): Rewrite to allow
        for incremental looping. Remove references to Rel_Time and
        Relative_Timed_Wait.
        * libgnat/s-osprim__posix.adb, libgnat/s-osprim__posix2008.adb
        (Timed_Delay): Make separate.
        * libgnat/s-optide.adb: New separate procedure.
        * libgnat/s-osprim.ads (Max_System_Delay): New constant.
        * libgnat/s-osprim__lynxos.ads (Max_Sensible_Delay): Set to 6 months.
        (Max_System_Delay): New constant.

2018-05-25  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch12.adb (Validate_Derived_Type_Instance): Verify that the actual
        for a formal derived type implements all the interfaces declared for
        the formal.

2018-05-25  Yannick Moy  <moy@adacore.com>

        * sem_prag.adb (Check_Applicable_Policy): Deal specially with CodePeer
        and GNATprove modes when applicable policy is Ignore.

2018-05-25  Eric Botcazou  <ebotcazou@adacore.com>

        * freeze.adb (Freeze_Enumeration_Type): Do not give integer size to a
        boolean type with convention C.
        * libgnat/i-cexten.ads (bool): Change to boolean with convention C.
        * gcc-interface/decl.c (gnat_to_gnu_entity): Add new local variable
        FOREIGN and use it throughout the function.
        <E_Enumeration_Type>: Set precision 1 on boolean types with foreign
        convention.
        <E_Enumeration_Subtype>: Likewise for subtypes.
        <E_Record_Type>: Force the size of a storage unit on empty classes.
        * gcc-interface/utils.c (make_type_from_size) <BOOLEAN_TYPE>: Skip
        boolean types with precision 1 if the size is the expected one.

2018-05-25  Arnaud Charlet  <charlet@adacore.com>

        * pprint.adb (Expression_Name): Do not print non ASCII characters.

2018-05-25  Bob Duff  <duff@adacore.com>

        * libgnat/a-strunb__shared.ads, libgnat/a-stwiun__shared.ads,
        libgnat/a-stzunb__shared.ads: (Initialize, Adjust): Add pragma Inline.

2018-05-25  Bob Duff  <duff@adacore.com>

        * sem_util.ads: Minor comment fix.

2018-05-25  Ed Schonberg  <schonberg@adacore.com>

        * exp_unst.adb (Visit_Node): Restrict check for uplevel references in
        prefixes of array attributes, to prefixes that are entity names whose
        type is constrained.
        (Note_Uplevel_Bound): Verify that the bound is declared in an enclosing
        subprogram, as itype created for loops in pre/postcondition may appear
        in loops at the library level.

2018-05-25  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch13.adb (Build_Predicate_Functions): The predicate function
        declaration is inserted into the tree and analyzed at that point, so
        should not be reinserted when the body is constructed. Inside a
        generic, ensure that the body is not inserted twice in the tree.

2018-05-25  Yannick Moy  <moy@adacore.com>

        * sem_prag.adb (Check_Grouping): Modify test to ignore statements and
        declarations not coming from source.

2018-05-25  Fedor Rybin  <frybin@adacore.com>

        * doc/gnat_ugn/gnat_utility_programs.rst: Document new switch
        --copy-environment for gnattest.

2018-05-24  Piotr Trojanek  <trojanek@adacore.com>

        * sem_elab.adb (Non_Private_View): Simplify by removing a local Result
        variable.
        * sem_prag.adb (Get_Base_Subprogram): Same as above.

2018-05-24  Eric Botcazou  <ebotcazou@adacore.com>

        * fe.h (Set_Normalized_First_Bit): Declare.
        (Set_Normalized_Position): Likewise.
        * repinfo.adb (List_Record_Layout): Do not use irregular output for a
        variable position.  Fix minor spacing issue.
        * gcc-interface/decl.c (annotate_rep): If a field has a variable
        offset, compute the normalized position and annotate it in addition to
        the bit offset.

2018-05-24  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/trans.c (Handled_Sequence_Of_Statements_to_gnu):
        Constify and rename variables.  Fix formatting.
        (gnat_to_gnu) <N_Exception_Handler>: Minor tweak.
        <N_Raise_Statement>: Likewise.

2018-05-24  Javier Miranda  <miranda@adacore.com>

        * exp_ch8.adb (Build_Body_For_Renaming): Adding support to build the
        body of a variant record equality renaming.
        (Expand_N_Subprogram_Renaming_Declaration): Adapt the code to the new
        implementation of Build_Body_For_Renaming.
        * exp_ch3.ads (Build_Variant_Record_Equality): New library level
        function that factorizes the functionality needed by
        Build_Body_For_Renaming and Expand_Freeze_Record_Type to build the body
        of a variant record equality subprogram.
        * exp_ch3.adb (Build_Variant_Record_Equality): New subprogram.
        (Build_Variant_Record_Equality): New local procedure of
        Expand_Freeze_Record_Type containing all the code specific for freezing
        the record type that cannot be place in the new library level function.

2018-05-24  Ed Schonberg  <schonberg@adacore.com>

        * einfo.ads, einfo.adb (Is_Activation_Record): New flag on
        in_parameters, used when unesting subprograms for LLVM, to indicate
        that a generated parameter carries the activation record from the
        enclosing subprogram.
        * exp_unst.adb (Check_Static_Type): Handle array attributes of types
        whose bounds may contain up-level references that need to be added to
        an activation recoord.
        (Add_Extra_Formal): Set Is_Activation_Record on new formal.

2018-05-24  Yannick Moy  <moy@adacore.com>

        * pprint.adb (Expression_Image): Improve the printing of expressions,
        by taking more cases into account, in particular qualified expressions
        and aggregates.  Also count more the number of parentheses to close
        after the expression.

2018-05-24  Javier Miranda  <miranda@adacore.com>

        * sem_ch3.adb (Is_Visible_Component): For untagged types add missing
        check for renamed discriminants.
        * sem_ch4.adb (Analyze_Overloaded_Selected_Component,
        Analyze_Selected_Component, Check_Misspelled_Selector): For calls to
        Is_Visible_Component pass the associated selector node to allow
        checking renamed discriminants on untagged types.

2018-05-24  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch8.adb (Analyze_Use_Type): Do not assign the Prev_Use_Clause
        link to a use_type clause if this would cause an infinite loop in the
        machinery that detects redundant use clauses. This may happen when the
        redundant clauses appear in the context of a child unit and the context
        of its parent.

2018-05-24  Piotr Trojanek  <trojanek@adacore.com>

        * sinfo.ads: Fix grammar in comment.

2018-05-24  Justin Squirek  <squirek@adacore.com>

        * einfo.ads, einfo.adb (Append_Entity): Modified to use Link_Entities
        and manage doubly-linked entity chain.
        (Nested_Scenarios): Removed entity field used for optimization during
         elaboration to make room for the new field Prev_Entity.
        (Link_Entities): Added to replace redundant calls to Set_Next_Entity
        and Set_Prev_Entity as well as centralize changes to the entity chain.
        (Predicated_Parent): Modified to use Node38.
        (Prev_Entity): Added to fetch new node field Prev_Entity in all entity
        types.
        (Remove_Entity): Moved from sem_util.
        (Set_Nested_Scenarios): Deleted.
        (Set_Predicated_Parent): Modified to use Node38.
        (Set_Prev_Entity): Added to set Prev_Entity field.
        (Set_Validated_Object): Modified to use Node38.
        (Unlink_Next_Entity): Added to process Prev_Entity when an unlinking
        action is required.
        (Validated_Object): Modified to use Node38.
        (Write_Field36_Name): Remove Nested_Scenarios, Validated_Object, and
        predicated parent cases.
        (Write_Field38_Name): Add predicated parent and Validated_Object cases.
        * sem_ch3.adb (Process_Subtype): Add guard to protect against
        inappropriate marking of Predicated_Parent to non-itype subtypes.
        (Make_Class_Wide_Type): Preserve Prev_Entity field and set in new type.
        (Copy_And_Swap): Add setting of Prev_Entity.
        (Build_derived_Record_Type): Replace Set_Next_Entity w/ Link_Entities.
        * sem_ch6.adb (Analyze_Subprogram_Body_Helper): Replace Set_Next_Entity
        w/ Link_Entities.
        (New_Overloaded_Entity): Remove block created to search for previous
        entities in the entity chain with relevant calls to Prev_Entity as well
        as replace duplicated code from Remove_Entity_And_Homonym with a call
        to that subprogram.
        * sem_ch7.adb (Exchange_Declarations): Replace Set_Next_Entity w/
        Link_Entities.
        * sem_elab.adb (Find_And_Process_Nested_Scenarios): Remove global and
        initial subprogram declarations related to Nested_Scenarios.
        (Process_Nested_Scenarios): Deleted.
        (Save_Scenario): Deleted.
        (Traverse_Body): Remove optimization for Nested_Scenarios so as to free
        node space in the entity tree.
        * sem_util.adb, sem_util.ads (Remove_Entity): Moved to einfo.
        (Remove_Entity_And_Homonym): Added to separate functionality of
        Remove_Entity from the homonym chain directly.
        * exp_attr.adb (Expand_N_Attribute_Reference): Replace Set_Next_Entity
        w/ Link_Entities and Unlink_Next_Entity.
        * exp_ch3.adb (Expand_N_Object_Declaration): Replace Set_Next_Entity w/
        Link_Entities.
        * exp_ch6.adb (Replace_Renaming_Declaration_Id): Replace
        Set_Next_Entity w/ Link_Entities.
        * exp_disp.adb (Expand_Dispatching_Call): Replace Set_Next_Entity w/
        Link_Entities and Unlink_Next_Entity.
        * exp_spark.adb (Expand_SPARK_N_Object_Renaming_Declaration): Replace
        call to Remove_Entity with its new incarnation.
        * exp_util.adb (New_Class_Wide_Subtype): Add setting of Prev_Entity.
        * freeze.adb (Freeze_Record_Type): Replace Set_Next_Entity w/
        Link_Entities.

2018-05-24  Hristian Kirtchev  <kirtchev@adacore.com>

        * sem_ch10.adb (Expand_Limited_With_Clause): Update the call to
        Install_Limited_Withed_Unit.
        (Expand_With_Clause): Update the call to Install_Withed_Unit.
        (Implicit_With_On_Parent): Update the call to Install_Withed_Unit.
        (Install_Context_Clauses): Update the call to Install_Withed_Unit.
        (Install_Limited_Context_Clauses): Update the calls to
         Install_Limited_Withed_Unit.
        (Install_Limited_Withed_Unit): Renamed to better illustrate its
        purpose.
        (Install_Private_With_Clauses): Update the calls to Install_Withed_Unit
        and Install_Limited_Withed_Unit.
        (Install_With_Clause): Uninstall a limited with clause if a [private]
        with clause is given for the same package.
        (Install_Withed_Unit): Renamed to better illustrate its purpose.
        (Remove_Limited_With_Unit): New routine.

2018-05-24  Eric Botcazou  <ebotcazou@adacore.com>

        * raise-gcc.c (__gnat_SEH_error_handler): Remove prototype.
        (__gnat_personality_seh0): Adjust and beef up comments, and
        fix formatting throughout.
        (__gnat_adjust_context): Deal minimally with version 2.
        * seh_init.c (__gnat_map_SEH): Fix formatting.
        (_gnat_SEH_error_handler): Adjust comments.
        (__gnat_install_SEH_handler): Fix formatting.

2018-05-24  Hristian Kirtchev  <kirtchev@adacore.com>

        * exp_ch7.adb, sem_ch3.adb, sem_res.adb: Minor reformatting.

2018-05-24  Ed Schonberg  <schonberg@adacore.com>

        * exp_aggr.adb (Flatten): Add a warning on an others clause in an array
        aggregate with static bounds when named associations cover all index
        positions and the others clause is redundant.

2018-05-24  Raphael Amiard  <amiard@adacore.com>

        * libgnat/a-cohama.ads: Add documentation.

2018-05-24  Raphael Amiard  <amiard@adacore.com>

        * libgnat/a-convec.ads: Add documentation.

2018-05-24  Justin Squirek  <squirek@adacore.com>

        * exp_ch3.adb (Expand_N_Object_Declaration): Ignore raising an error in
        expansion for limited tagged types when the node to be expanded is a
        raise expression due to it not representing a valid object.
        * exp_ch5.adb (Expand_N_Assignment_Statement): Add exception to error
        message regarding assignments to limited types to ignore genereated
        code.

2018-05-24  Hristian Kirtchev  <kirtchev@adacore.com>

        * exp_util.adb (New_Class_Wide_Subtype): Capture and restore relevant
        Ghost-related attributes of the class-wide subtype because the copy
        clobbers them.

2018-05-24  Justin Squirek  <squirek@adacore.com>

        * sem_res.adb (Resolve_Entity_Name): Add guard to protect against
        marking use clauses as effective when the reference appears within
        generated code.

2018-05-24  Cyrille Comar  <comar@adacore.com>

        * doc/gnat_rm/the_gnat_library.rst: Fix typos.
        * gnat_rm.texi: Regenerate.

2018-05-24  Bob Duff  <duff@adacore.com>

        * exp_ch7.adb (Expand_Cleanup_Actions): Create a mark unconditionally
        for build-in-place functions with a caller-unknown-size result.
        (Create_Finalizer): For build-in-place functions with a
        caller-unknown-size result, check at run time whether we need to
        release the secondary stack.

2018-05-24  Hristian Kirtchev  <kirtchev@adacore.com>

        * sem_prag.adb (Analyze_Pragma): Use the full view of an internally
        generated incomplete type.

2018-05-24  Hristian Kirtchev  <kirtchev@adacore.com>

        * expander.adb (Expand): Update the save and restore of the Ghost
        region.
        * exp_ch3.adb (Freeze_Type): Likewise.
        * exp_disp.adb (Make_DT): Likewise.
        * exp_util.adb (Build_DIC_Procedure_Body): Likewise.
        (Build_DIC_Procedure_Declaration): Likewise.
        (Build_Invariant_Procedure_Body): Likewise.
        (Build_Invariant_Procedure_Declaration): Likewise.
        (Make_Predicate_Call): Likewise.
        * freeze.adb (Add_To_Result): Insert the freeze action of a living
        entity prior to the start of the enclosing ignored Ghost region.
        (Freeze_Entity): Update the save and restore of the Ghost region.
        * ghost.adb (Install_Ghost_Mode): Reimplemented.
        (Install_Ghost_Region): New routine.
        (Mark_And_Set_Ghost_Assignment): Install a region rather than a mode.
        (Mark_And_Set_Ghost_Body): Likewise.
        (Mark_And_Set_Ghost_Completion): Likewise.
        (Mark_And_Set_Ghost_Declaration): Likewise.
        (Mark_And_Set_Ghost_Instantiation): Likewise.
        (Mark_And_Set_Ghost_Procedure_Call): Likewise.
        (Name_To_Ghost_Mode): New routine.
        (Restore_Ghost_Region): New routine.
        * ghost.ads (Install_Ghost_Region): New routine.
        (Restore_Ghost_Region): New routine.
        * opt.ads: Add new global variable Ignored_Ghost_Region.
        * rtsfind.adb (Load_RTU): Update the save and restore of the Ghost
        region. Install a clean region.
        * sem.adb (Analyze): Likewise.
        (Do_Analyze): Likewise.
        * sem_ch3.adb (Analyze_Object_Declaration): Likewise
        (Derive_Progenitor_Subprograms): Use local variable Iface_Alias to
        capture the ultimate alias of the current primitive.
        (Process_Full_View): Update the save and restore of the Ghost region.
        Do not inherit DIC and invariant procedures.
        * sem_ch5.adb (Analyze_Assignment): Update the save and restore of the
        Ghost region.
        * sem_ch6.adb (Analyze_Procedure_Call): Likewise.
        (Analyze_Subprogram_Body_Helper): Likewise.
        * sem_ch7.adb (Analyze_Package_Body_Helper): Likewise.
        * sem_ch12.adb (Analyze_Package_Instantiation): Likewise.
        (Analyze_Subprogram_Instantiation): Likewise.
        (Instantiate_Package_Body): Likewise.
        (Instantiate_Subprogram_Body): Likewise.
        * sem_ch13.adb (Build_Predicate_Functions): Likewise.
        (Build_Predicate_Function_Declaration): Likewise.
        * sem_disp.adb
        (Add_Dispatching_Operation): Do not consider DIC and invariant
        procedures.
        (Check_Dispatching_Operation): Use Add_Dispatching_Operation to collect
        a dispatching subprogram.
        (Check_Operation_From_Private_View): Likewise.
        (Override_Dispatching_Operation): Likewise.
        * sem_prag.adb (Analyze_Contract_Cases_In_Decl_Part): Update the save
        and restore of the Ghost region.
        (Analyze_Initial_Condition_In_Decl_Part): Likewise.
        (Analyze_Pragma): Update the save and restore of the Ghost region.
        (Analyze_Pre_Post_Condition_In_Decl_Part): Likewise.
        * sem_util.adb (Is_Suitable_Primitive): New routine.
        * sem_util.ads (Is_Suitable_Primitive): New routine.
        * sinfo.ads: Update the section of Ghost regions.

2018-05-24  Piotr Trojanek  <trojanek@adacore.com>

        * doc/gnat_rm/implementation_defined_pragmas.rst (Contract_Cases):
        Change "condition" to "case guard" after renaming in the contract
        grammar.
        * gnat_rm.texi: Regenerate.

2018-05-24  Hristian Kirtchev  <kirtchev@adacore.com>

        * exp_util.adb (Expand_Static_Predicates_In_Choices): Indicate that the
        construct with discrete choices no longer contains a subtype with
        predicates since the expansion already handled this case.

2018-05-24  Hristian Kirtchev  <kirtchev@adacore.com>

        * freeze.adb (Wrap_Imported_Subprogram): Generate an unchecked
        conversion to the return type to avoid a side effect where an imported
        relocated function generates a new anonymous access type, whose
        accessibility level does not agree with with that of the wrapper.

2018-05-24  Javier Miranda  <miranda@adacore.com>

        * sem_util.adb (Abstract_Interface_List): Add missing support for
        private types whose full view is a synchronized type.
        * sem_ch3.adb (Build_Derived_Private_Type): Skip building the full
        derivation of a private type parent type is a task type with
        discriminants as gigi does not use such type directly.

2018-05-24  Hristian Kirtchev  <kirtchev@adacore.com>

        * sem_elab.adb (Build_Variable_Reference_Marker): Do not create a
        variable marker when the reference appears in the formal part of a
        compilation unit instance because there is no place to insert it.
        (In_Compilation_Instance_Formal_Part): New routine.

2018-05-24  Piotr Trojanek  <trojanek@adacore.com>

        * layout.ads, repinfo.ads: Fix references to renamed Backend_Layout
        configuration parameter.

2018-05-24  Doug Rupp  <rupp@adacore.com>

        * argv-lynxos178-raven-cert.c: New file.
        * libgnat/system-lynxos178-x86.ads: New file.

2018-05-23  Hristian Kirtchev  <kirtchev@adacore.com>

        * exp_disp.adb, freeze.adb, gnat1drv.adb, sem_ch5.adb, sem_spark.adb:
        Minor reformattings.

2018-05-23  Pascal Obry  <obry@adacore.com>

        * adaint.c (win32_wait): Properly free the handle/pid lists when
        WaitForMultipleObjects fails (return WAIT_FAILED).

2018-05-23  Pascal Obry  <obry@adacore.com>

        * adaint.c (win32_wait): Add missing parentheses.

2018-05-23  Hristian Kirtchev  <kirtchev@adacore.com>

        * exp_ch3.adb (Check_Large_Modular_Array): Moved to Freeze.
        (Expand_N_Object_Declaration): Do not check for a large modular array
        here.
        * freeze.adb (Check_Large_Modular_Array): Moved from Exp_Ch3.
        (Freeze_Object_Declaration): Code cleanup. Check for a large modular
        array.
        * sem_ch3.adb: Minor reformatting.

2018-05-23  Ed Schonberg  <schonberg@adacore.com>

        * einfo.ads: New attribute on types: Predicated_Parent, to simplify the
        retrieval of the applicable predicate function to an itype created for
        a constrained array component.
        * einfo.adb: Subprograms for Predicated_Parent.
        (Predicate_Function): Use new attribute.
        * exp_util.adb (Make_Predicate_Call): If the predicate function is not
        available for a subtype, retrieve it from the base type, which may have
        been frozen after the subtype declaration and not captured by the
        subtype declaration.
        * sem_aggr.adb (Resolve_Array_Aggregate): An Others association is
        legal within a generated initiqlization procedure, as may happen with a
        predicate check on a component, when the predicate function applies to
        the base type of the component.
        * sem_ch3.adb (Analyze_Subtype_Declaration): Clean up inheritance of
        predicates for subtype declarations and for subtype indications in
        other contexts.
        (Process_Subtype): Likewise. Handle properly the case of a private type
        with unknown discriminants whose full view is an unconstrained array.
        Use Predicated_Parent to indicate source of predicate function on an
        itype whose parent is itself an itype.
        (Complete_Private_Subtype): If the private view has unknown
        discriminants and the full view is an unconstrained array, set base
        type of completion to the full view of parent.
        (Inherit_Predicate_Flags): Prevent double assignment of predicate
        function and flags.
        (Build_Subtype): For a constrained array component, propagate predicate
        information from original component type declaration.

2018-05-23  Boris Yakobowski  <yakobowski@adacore.com>

        * libgnat/a-ngelfu.ads (Arctanh, Arccoth): Fix faulty preconditions.

2018-05-23  Arnaud Charlet  <charlet@adacore.com>

        * checks.adb (Minimize_Eliminate_Overflows): Default initialize Lo and
        Hi.
        * sem_elab.adb: Make "out" parameters instead of "in out" when
        relevant.

2018-05-23  Bob Duff  <duff@adacore.com>

        * gnatbind.adb (List_Applicable_Restrictions): Add
        No_Implementation_Restrictions to the list of restrictions not to list.
        Remove double negative "not No_Restriction_List".  Comment the
        commentary that is output, so it won't cause errors if used directly in
        a gnat.adc.

2018-05-23  Ed Schonberg  <schonberg@adacore.com>

        * sem_prag.adb (Inherit_Class_Wide_Pre): Refine legality check on
        class-wide precondition on a type extension when ancestor does not have
        a class-wide precondition.  Previously the compiler accepted such a
        precondition when the ancestor had a class-wide postcondition.

2018-05-23  Javier Miranda  <miranda@adacore.com>

        * sem_attr.adb (Valid_Scalars): Do not invoke Error_Attr_P to report
        the warning on occurrences of this attribute whose evaluation is always
        true (since that subprogram aborts processing the attribute). In
        addition, replace the node by its boolean result 'True' (required
        because the backend has no knowledge of this attribute).

2018-05-23  Bob Duff  <duff@adacore.com>

        * libgnat/a-convec.adb: (Insert, Insert_Space): Suppress warnings. The
        code in question is not reachable in the case where Count_Type'Last is
        out of range.

2018-05-23  Yannick Moy  <moy@adacore.com>

        * doc/gnat_rm/implementation_defined_pragmas.rst: Clarify meaning of
        local pragma Warnings Off without On.
        * gnat_rm.texi: Regenerate.

2018-05-23  Olivier Hainque  <hainque@adacore.com>

        * libgnat/g-excact.ads (Is_Foreign_Exception): New predicate.
        * libgnat/g-excact.adb: Implement.

2018-05-23  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch5.adb (Analyze_Iterator_Specification): If a subtype indication
        is present, verify its legality when the domain of iteration is a
        GNAT-specific formal container, as is already done for arrays and
        predefined containers.

2018-05-23  Yannick Moy  <moy@adacore.com>

        * sem_util.adb (Enclosing_Declaration): Fix the case of a named number
        declaration, which was not taken into account.

2018-05-23  Hristian Kirtchev  <kirtchev@adacore.com>

        * debug.adb: Switch -gnatd_s is now used to stop elaboration checks on
        synchronized suspension.
        * rtsfind.ads: Add entries for units Ada.Synchronous_Barriers and
        Ada.Synchronous_Task_Control and routines Suspend_Until_True and
        Wait_For_Release.
        * sem_elab.adb: Document switch -gnatd_s.
        (In_Task_Body): New routine.
        (Is_Potential_Scenario): Code cleanup. Stop the traversal of a task
        body when the current construct denotes a synchronous suspension call,
        and restriction No_Entry_Calls_In_Elaboration_Code or switch -gnatd_s
        is in effect.
        (Is_Synchronous_Suspension_Call): New routine.
        * switch-c.adb (Scan_Front_End_Switches): Switch -gnatJ now sets switch
        -gnatd_s.

2018-05-23  Javier Miranda  <miranda@adacore.com>

        * exp_disp.adb (Make_DT): Restrict the initialization of
        External_Tag and Expanded_Name to an empty string to the case where
        both pragmas apply (i.e. No_Tagged_Streams and Discard_Names), since
        restricted runtimes are compiled with pragma Discard_Names.
        * doc/gnat_rm/implementation_defined_pragmas.rst,
        doc/gnat_rm/implementation_defined_characteristics.rst: Add
        documentation.
        * gnat_rm.texi: Regenerate.

2018-05-23  Maroua Maalej  <maalej@adacore.com>

        * sem_spark.adb: Fix of some permission rules of pointers in SPARK.

2018-05-23  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch5.adb (Preanalyze_Range): The pre-analysis of the domain of
        iteration of an Ada2012 loop is performed to determine the type of the
        domain, but full analysis is performed once the loop is rewritten as a
        while-loop during expansion. The pre-analysis suppresses expansion; it
        must also suppress the generation of freeze nodes, which may otherwise
        appear in the wrong scope before rewritting.

2018-05-23  Hristian Kirtchev  <kirtchev@adacore.com>

        * sem_elab.adb: Update the section on suppressing elaboration warnings.

2018-05-23  Hristian Kirtchev  <kirtchev@adacore.com>

        * einfo.adb (Is_Elaboration_Checks_OK_Id): Use predicate
        Is_Elaboration_Target.
        (Is_Elaboration_Target): New routine.
        (Is_Elaboration_Warnings_OK_Id): Use predicate Is_Elaboration_Target.
        (Set_Is_Elaboration_Checks_OK_Id): Use predicate Is_Elaboration_Target.
        (Set_Is_Elaboration_Warnings_OK_Id): Use predicate
        Is_Elaboration_Target.
        * einfo.ads: Add new synthesized attribute Is_Elaboration_Target along
        with occurrences in nodes.
        (Is_Elaboration_Target): New routine.
        * sem_prag.adb (Analyze_Pragma): Suppress elaboration warnings when an
        elaboration target is subject to pragma Warnings (Off, ...).

2018-05-23  Eric Botcazou  <ebotcazou@adacore.com>

        * repinfo.adb (List_Type_Info): Remove obsolete stuff.

2018-05-23  Hristian Kirtchev  <kirtchev@adacore.com>

        * einfo.adb: Flag304 is now Is_Elaboration_Warnings_OK_Id.
        (Is_Elaboration_Warnings_OK_Id): New routine.
        (Set_Is_Elaboration_Warnings_OK_Id): New routine.
        (Write_Entity_Flags): Output Flag304.
        * einfo.ads: Add new attribute Is_Elaboration_Warnings_OK_Id along with
        occurrences in entities.
        (Is_Elaboration_Warnings_OK_Id): New routine along with pragma Inline.
        (Set_Is_Elaboration_Warnings_OK_Id): New routine along with pragma
        Inline.
        * sem_attr.adb (Analyze_Access_Attribute): Capture the state of
        elaboration warnings.
        * sem_ch3.adb (Analyze_Object_Declaration): Capture the state of
        elaboration warnings.
        * sem_ch6.adb (Analyze_Abstract_Subprogram_Declaration): Capture the
        state of elaboration warnings.
        (Analyze_Subprogram_Body_Helper): Capture the state of elaboration
        warnings.
        (Analyze_Subprogram_Declaration): Capture the state of elaboration
        warnings.
        * sem_ch9.adb (Analyze_Entry_Declaration): Capture the state of
        elaboration warnings.
        (Analyze_Single_Task_Declaration): Capture the state of elaboration
        warnings.
        (Analyze_Task_Type_Declaration): Capture the state of elaboration
        warnings.
        * sem_ch12.adb (Analyze_Generic_Package_Declaration): Capture the state
        of elaboration warnings.
        (Analyze_Generic_Subprogram_Declaration): Capture the state of
        elaboration warnings.
        * sem_elab.adb: Add a section on suppressing elaboration warnings.
        Type Processing_Attributes includes component Suppress_Warnings
        intended to suppress any elaboration warnings along a path in the
        graph.  Update Initial_State to include a value for this component.
        Types Target_Attributes and Task_Attriutes include component
        Elab_Warnings_OK to indicate whether the target or task has elaboration
        warnings enabled.  component Elab_Warnings_OK.
        (Build_Access_Marker): Propagate attribute
        Is_Elaboration_Warnings_OK_Node from the attribute to the generated
        call marker.
        (Extract_Instantiation_Attributes): Set the value for Elab_Warnings_OK.
        (Extract_Target_Attributes): Set the value for Elab_Warnings_OK.
        (Extract_Task_Attributes): Set the value for Elab_Warnings_OK.
        (Process_Conditional_ABE_Access): Suppress futher elaboration warnings
        when already in this mode or when the attribute or target have warnings
        suppressed.
        (Process_Conditional_ABE_Activation_Impl): Do not emit any diagnostics
        if warnings are suppressed.
        (Process_Conditional_ABE_Call): Suppress further elaboration warnings
        when already in this mode, or the target or call have warnings
        suppressed.
        (Process_Conditional_ABE_Call_Ada): Do not emit any diagnostics if
        warnings are suppressed.
        (Process_Conditional_ABE_Call_SPARK): Do not emit any diagnostics if
        warnings are suppressed.
        (Process_Conditional_ABE_Instantiation): Suppress further elaboration
        warnings when already in this mode or when the instantiation has
        warnings suppressed.
        (Process_Conditional_ABE_Instantiation_Ada): Do not emit any
        diagnostics if warnings are suppressed.
        (Process_Conditional_ABE_Variable_Assignment_Ada): Use the more
        specific Is_Elaboration_Warnings_OK_Id rather than Warnings_Off.
        (Process_Conditional_ABE_Variable_Assignment_SPARK): Use the more
        specific Is_Elaboration_Warnings_OK_Id rather than Warnings_Off.
        (Process_Task_Object): Suppress further elaboration warnings when
        already in this mode, or when the object, activation call, or task type
        have warnings suppressed. Update the processing state to indicate that
        the path goes through a task body.
        * sinfo.adb (Is_Elaboration_Warnings_OK_Node): Accept attribute
        references.
        (Set_Is_Elaboration_Warnings_OK_Node): Accept attribute references.
        * sinfo.ads: Attribute Is_Elaboration_Warnings_OK_Node now applies to
        attribute references.

2018-05-23  Piotr Trojanek  <trojanek@adacore.com>

        * einfo.ads: Minor reformatting.

2018-05-23  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch3.adb (Analyze_Object_Declaration): If expression is an
        anonymous_access_to_ subprogram formal, apply a conversion to force an
        accsssibility check that will fail statically, enforcing 3.10.2 (13).

2018-05-23  Daniel Mercier  <mercier@adacore.com>

        * gnat1drv.adb: Turn off length expansion in CodePeer mode.

2018-05-23  Bob Duff  <duff@adacore.com>

        * freeze.adb: (Check_Address_Clause): Deal with build-in-place
        aggregates in addition to build-in-place calls.

2018-05-23  Bob Duff  <duff@adacore.com>

        * einfo.ads: Minor reformatting.
        * sem_ch3.adb: Likewise.
        * sinfo.ads: Likewise.

2018-05-23  Hristian Kirtchev  <kirtchev@adacore.com>

        * exp_ch3.adb (Default_Initialize_Object): Do not optimize scalar array
        initialization when the component type has predicates.
        * exp_ch4.adb (Expand_N_Allocator): Do not optimize scalar array
        allocation when the component type has predicates.

2018-05-23  Hristian Kirtchev  <kirtchev@adacore.com>

        * einfo.adb, exp_disp.adb, sem_ch3.adb, sem_ch6.adb, sem_prag.adb:
        Minor reformatting.

2018-05-22  Justin Squirek  <squirek@adacore.com>

        * sem_ch6.adb (Analyze_Expression_Function): Propagate flags from the
        original function spec into the generated function spec due to
        expansion of expression functions during analysis.
        (Analyze_Subprogram_Body_Helper): Modify check on formal parameter
        references from the body to the subprogram spec in the case of
        expression functions because of inconsistances related to having a
        generated body.
        * libgnarl/s-osinte__android.ads: Flag parameters as unused.
        * libgnarl/s-osinte__lynxos178e.ads: Likewise.
        * libgnarl/s-osinte__qnx.adb: Likewise.
        * libgnarl/s-osinte__qnx.ads: Likewise.

2018-05-22  Doug Rupp  <rupp@adacore.com>

        * init.c (HAVE_ADJUST_CONTEXT_FOR_RAISE): Don't define on VxWorks7 for
        AArch64.

2018-05-22  Olivier Hainque  <hainque@adacore.com>

        * libgnat/a-except.adb (Exception_Propagation.Propagate_Exception):
        Expect an Exception_Occurence object, not an Access.
        (Complete_And_Propagate_Occurrence): Adjust accordingly.
        (Raise_From_Signal_Handler): Likewise.
        (Reraise_Occurrence_No_Defer): If we have a Machine_Occurrence
        available in the provided occurrence object, just re-propagate the
        latter as a bare "raise;" would do.
        * libgnat/a-exexpr.adb (Propagate_Exception): Adjust to spec change.
        * libgnat/a-exstat.adb (String_To_EO): Initialize X.Machine_Occurrence
        to null, to mark that the occurrence we're crafting from the stream
        contents is not being propagated (yet).

2018-05-22  Hristian Kirtchev  <kirtchev@adacore.com>

        * exp_aggr.adb (Initialize_Ctrl_Record_Component): Insert the generated
        code for a transient component in line with the rest of the
        initialization code, rather than before the aggregate. This ensures
        that the component has proper visibility of the discriminants.

2018-05-22  Jerome Lambourg  <lambourg@adacore.com>

        * adaint.c: Reorganize QNX-specific macros, use syspage to retreive the
        number of CPUs.

2018-05-22  Jerome Lambourg  <lambourg@adacore.com>

        * sigtramp-qnx.c: Properly restore link register in signal trampoline.

2018-05-22  Hristian Kirtchev  <kirtchev@adacore.com>

        * exp_aggr.adb (Aggr_Assignment_OK_For_Backend): Strip away any
        conversions before extracting the value of the expression.
        * exp_ch3.adb (Default_Initialize_Object): Optimize the default
        initialization of an array of scalars.
        (Get_Simple_Init_Val): Add processing for array types. Remove the
        processing of strings because this case is already handled by the array
        case.
        (Needs_Simple_Initialization): Moved to Sem_Util.
        (Simple_Init_Array_Type): New routine.
        (Simple_Init_Initialize_Scalars_Type): Reimplemented to use the new
        facilities from Sem_Util.
        (Simple_Initialization_OK): New routine.
        * exp_ch3.ads (Needs_Simple_Initialization): Moved to Sem_Util.
        * exp_ch4.adb (Expand_N_Allocator): Optimize the default allocation of
        an array of scalars.
        * sem_prag.adb (Analyze_Float_Value): New routine.
        (Analyze_Integer_Value): New routine.
        (Analyze_Pragma): Reimplement the analysis of pragma Initialize_Scalars
        to handled the extended form of the pragma.
        (Analyze_Type_Value_Pair): New routine.
        * sem_util.adb: Add invalid value-related data structures.
        (Examine_Array_Bounds): New routine.
        (Has_Static_Array_Bounds): Reimplemented.
        (Has_Static_Non_Empty_Array_Bounds): New routine.
        (Invalid_Scalar_Value): New routine.
        (Needs_Simple_Initialization): Moved from Exp_Ch3.
        (Set_Invalid_Scalar_Value): New routines.
        * sem_util.ads (Has_Static_Non_Empty_Array_Bounds): New routine.
        (Invalid_Scalar_Value): New routine.
        (Needs_Simple_Initialization): Moved from Exp_Ch3.
        (Set_Invalid_Scalar_Value): New routines.
        * snames.ads-tmpl: Add names for the salar type families used by pragma
        Initialize_Scalars.

2018-05-22  Javier Miranda  <miranda@adacore.com>

        * exp_disp.adb (Make_DT): Initialize the External_Tag with an empty
        string when pragma No_Tagged_Streams is applicable to the tagged type,
        and initialize the Expanded_Name with an empty string when pragma
        Discard_Names is applicable to the tagged type.

2018-05-22  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch6.adb (Check_Conformance): Add RM reference for rule that a
        formal subprogram is never subtype conformqnt, and thus cannot be the
        prefix of 'Access.  Reject as well the attribute when applied to a
        renaming of a formal subprogram.

2018-05-22  Hristian Kirtchev  <kirtchev@adacore.com>

        * exp_ch3.adb (Build_Array_Init_Proc): Update the call to
        Needs_Simple_Initialization.
        (Build_Init_Statements): Update the call to Get_Simple_Init_Val.
        (Check_Subtype_Bounds): Renamed to Extract_Subtype_Bounds. Update the
        profile and comment on usage.
        (Default_Initialize_Object): Do not use New_Copy_Tree to set the proper
        Sloc of a value obtained from aspect Default_Value because this could
        potentially replicate large trees. The proper Sloc is now set in
        Get_Simple_Init_Val.
        (Get_Simple_Init_Val): Reorganized by breaking the various cases into
        separate routines. Eliminate the use of global variables.
        (Init_Component): Update the call to Get_Simple_Init_Val.
        (Needs_Simple_Initialization): Update the parameter profile and all
        uses of T.
        (Simple_Init_Defaulted_Type): Copy the value of aspect Default_Value
        and set the proper Sloc.
        * exp_ch3.ads (Get_Simple_Init_Val): Update the parameter profile and
        comment on usage.
        (Needs_Simple_Initialization): Update the parameter profile.

2018-05-22  Patrick Bernardi  <bernardi@adacore.com>

        * sem_ch3.adb (Build_Discriminant_Constraints): Raise an error if the
        user tries to use a subtype indication as a discriminant constraint.

2018-05-22  Ed Schonberg  <schonberg@adacore.com>

        * exp_ch4.ads, exp_ch4.adb, exp_util.adb, expander.adb: Remove mention
        of N_Reduction_Expression and N_Reduction_Expression_Parameter.
        * par-ch4.adb: Remove parsing routines for reduction expressions.
        * sem.adb, sinfo.ads, sinfo.adb, sem_ch4.ads, sem_ch4.adb, sem_res.adb,
        sem_spark.adb, sprint.adb: Remove analysis routines for reduction
        expressions.

2018-05-22  Arnaud Charlet  <charlet@adacore.com>

        * sem_ch8.adb (Check_Frozen_Renaming): Do not emit error in
        Relaxed_RM_Semantics mode.

2018-05-22  Arnaud Charlet  <charlet@adacore.com>

        * comperr.adb (Delete_SCIL_Files): Take into account
        N_Generic_Package_Renaming_Declaration.

2018-05-22  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch3.adb (Search_Derivation_Levels): Whenever a parent type is
        private, use the full view if available, because it may include renamed
        discriminants whose values are stored in the corresponding
        Stored_Constraint.

2018-05-22  Ed Schonberg  <schonberg@adacore.com>

        * einfo.ads, einfo.adb: New attribute Hidden_In_Formal_Instance,
        defined on packages that are actuals for formal packages, in order to
        set/reset the visibility of the formals of a formal package with given
        actuals, when there are subsequent uses of those formals in the
        enclosing generic, as required by RN 12.7 (10).
        * atree.ads, atree.adb: Add operations for Elist30.
        * atree.h: Add Elist30.
        * sem_ch12.adb (Analyze_Formal_Package_Instantiation): Collect formals
        that are not defaulted and are thus not visible within the current
        instance.
        (Check_Formal_Packages): Reset visibility of formals of a formal
        package that are not defaulted, on exit from current instance.

2018-05-22  Hristian Kirtchev  <kirtchev@adacore.com>

        * sem_prag.adb (Analyze_Input_Output): Emit an error when a non-null,
        non-'Result output appears in the output list of a function.

2018-05-22  Hristian Kirtchev  <kirtchev@adacore.com>

        * exp_attr.adb (Build_Array_VS_Func): Reimplemented.
        (Build_Record_VS_Func): Reimplemented.
        (Expand_N_Attribute): Reimplement the handling of attribute
        'Valid_Scalars.
        * sem_attr.adb (Analyze_Attribute): Reimplement the handling of
        attribute 'Valid_Scalars.
        * sem_util.adb (Scalar_Part_Present): Reimplemented.
        (Validated_View): New routine.
        * sem_util.ads (Scalar_Part_Present): Update the parameter profile and
        comment on usage.
        (Validated_View): New routine.
        * doc/gnat_rm/implementation_defined_attributes.rst: Update the
        documentation of attribute 'Valid_Scalars.
        * gnat_rm.texi: Regenerate.

2018-05-22  Bob Duff  <duff@adacore.com>

        * binde.adb: (Choose): Ignore a pragma Elaborate_Body that appears in
        the spec of a SAL_Interface package.

2018-05-22  Ed Schonberg  <schonberg@adacore.com>

        * freeze.adb (Freeze_Entity): When analyzing delayed aspects of an
        entity E within a generic unit, indicate that there are no remaining
        delayed aspects after invoking Analyze_Aspects_At_Freeze_Point. The
        entity E is not frozen yet but the aspects should not be reanalyzed at
        the freeze point, which may be outside of the generic and may not have
        the proper visibility.

2018-05-22  Bob Duff  <duff@adacore.com>

        * doc/gnat_ugn/gnat_utility_programs.rst: Add documentation for
        the new --split-line-before-record, --indent-named-statements and
        --no-align-modes gnatpp switches.

2018-05-22  Ed Schonberg  <schonberg@adacore.com>

        * sem_prag.adb (Process_Compile_Time_Warning_Or_Error): Handle properly
        a second argument that is a constant of a given string value.

2018-05-22  Doug Rupp  <rupp@adacore.com>

        * sigtramp-vxworks-target.inc: Align stack to 128bits on AArch64.

2018-05-22  Jerome Lambourg  <lambourg@adacore.com>

        * sigtramp-qnx.c: Fix stack alignment issue in the signal trampoline.

2018-05-22  Ed Schonberg  <schonberg@adacore.com>

        * freeze.adb (Freeze_Fixed_Point_Type): If the first subtype has
        delayed aspects, analyze them now, os that the representation of the
        type (size, bounds) can be computed and validated.

2018-05-22  Olivier Hainque  <hainque@adacore.com>

        * libgnat/s-dwalin.adb (Enable_Cache): Skip symbols outside of the
        executable code section boundaries.

2018-05-22  Javier Miranda  <miranda@adacore.com>

        * locales.c: New implementation for the Ada.Locales package.
        * libgnat/a-locale.ads: Remove comment indicating that this is not
        implemented.
        * doc/gnat_rm/standard_library_routines.rst: Remove comment indicating
        that this is not implemented.
        * gnat_rm.texi: Regenerate.

2018-05-22  Hristian Kirtchev  <kirtchev@adacore.com>

        * exp_ch5.adb, freeze.adb, pprint.adb, sem_ch4.adb, sem_res.adb: Minor
        reformattings.

2018-05-22  Justin Squirek  <squirek@adacore.com>

        * sem_ch12.adb (In_Same_Declarative_Part): Moved to sem_util.
        (Freeze_Subprogram_Body, Install_Body): Modify calls to
        In_Same_Declarative_Part.
        * sem_prag.adb (Analyze_Pragma-Pragma_Pure_Function): Add check to
        verify pragma declaration is within the same declarative list with
        corresponding error message.
        * sem_util.adb, sem_util.ads (In_Same_Declarative_Part): Moved from
        sem_ch12.adb and generalized to be useful outside the scope of
        freezing.

2018-05-22  Hristian Kirtchev  <kirtchev@adacore.com>

        * sem_ch6.adb (Analyze_Subprogram_Declaration): Set the proper
        categorization of the unit after processing the aspects in case one of
        its aspects is converted into a categorization pragma.

2018-05-21  Ed Schonberg  <schonberg@adacore.com>

        * freeze.adb (Warn_Overlay): Do not emit a wawrning on an object
        declaration with an explicit address clause and a type with default
        initialization, if the declaration carries an aspect
        Suppress_Initialization.

2018-05-21  Daniel Mercier  <mercier@adacore.com>

        * pprint.adb: Use mixed case for attribute names.

2018-05-21  Hristian Kirtchev  <kirtchev@adacore.com>

        * sem_ch6.adb (Analyze_Generic_Subprogram_Body): Rename the call to
        Analyze_Aspect_Specifications_On_Body_Or_Stub.
        (Analyze_Subprogram_Body_Helper): Rename the calls to
        Analyze_Aspect_Specifications_On_Body_Or_Stub.
        * sem_ch9.adb (Analyze_Entry_Body): Rename the call to
        Analyze_Aspect_Specifications_On_Body_Or_Stub.
        * sem_ch10.adb: Add with and use clause for Sem_Ch13.
        (Analyze_Package_Body_Stub): Add constant Id. Decorate the package stub
        prior to analyzing its aspects.
        (Analyze_Protected_Body_Stub): Add constant Id. Decorate the package
        stub prior to analyzing its aspects. Save and restore the configuration
        switches.
        (Analyze_Task_Body_Stub): Add constant Id. Decorate the package stub
        prior to analyzing its aspects.
        * sem_ch13.adb (Analyze_Aspect_Specifications_On_Body_Or_Stub): Renamed
        to Analyze_Aspects_On_Subprogram_Body_Or_Stub.
        * sem_ch13.ads (Analyze_Aspect_Specifications_On_Body_Or_Stub): Renamed
        to Analyze_Aspects_On_Subprogram_Body_Or_Stub.
        * sem_prag.adb: Code reformatting.
        (Analyze_Refined_Depends_Global_Post): Consider task body stubs.

2018-05-21  Jerome Lambourg  <lambourg@adacore.com>

        * gcc-interface/Makefile.in: Add g-soliop__qnx.ads to the runtime build
        for QNX.

2018-05-21  Hristian Kirtchev  <kirtchev@adacore.com>

        * exp_cg.adb: Remove with and use clause for Exp_Disp.
        * exp_ch9.adb: Remove with and use clause for Exp_Disp.
        * exp_disp.adb (Is_Predefined_Dispatching_Operation): Moved to Sem_Util.
        (Is_Predefined_Interface_Primitive): Moved to Sem_Util.
        (Is_Predefined_Internal_Operation): Moved to Sem_Util.
        * exp_disp.ads (Is_Predefined_Dispatching_Operation): Moved to Sem_Util.
        (Is_Predefined_Interface_Primitive): Moved to Sem_Util.
        (Is_Predefined_Internal_Operation): Moved to Sem_Util.
        * exp_dist.adb: Remove with and use clause for Exp_Disp.
        * freeze.adb: Remove with and use clause for Exp_Disp.
        * sem_cat.adb: Remove with and use clause for Exp_Disp.
        * sem_ch6.adb: Remove with and use clause for Exp_Disp.
        * sem_ch12.adb: Remove with and use clause for Exp_Disp.
        * sem_elab.adb (Check_Overriding_Primitive): Do not process predefined
        primitives.
        * sem_util.adb: Remove with and use clause for Exp_Disp.
        (Is_Predefined_Dispatching_Operation): Moved from Exp_Disp.
        (Is_Predefined_Interface_Primitive): Moved from Exp_Disp.
        (Is_Predefined_Internal_Operation): Moved from Exp_Disp.
        * sem_util.ads (Is_Predefined_Dispatching_Operation): Moved from
        Exp_Disp.
        (Is_Predefined_Interface_Primitive): Moved from Exp_Disp.
        (Is_Predefined_Internal_Operation): Moved from Exp_Disp.

2018-05-21  Ed Schonberg  <schonberg@adacore.com>

        * sem_res.adb (Valid_Conversion): Improve error message on an illegal
        type conversion whose expression has a limited view of a type.

2018-05-21  Ed Schonberg  <schonberg@adacore.com>

        * exp_ch5.adb (Build_Formal_Container_Iteration): If source has
        explicit name for iterator loop, preserve that name in expanded
        construct, for possible use in exit statements.

2018-05-21  Javier Miranda  <miranda@adacore.com>

        * sem_ch4.adb (Analyze_Membership_Op): Avoid compiler crash when the
        spec of a unit has Ada 2012 membership tests with multiple choices and
        the unit body is not compiled under Ada 2012 mode.

2018-05-21  Doug Rupp  <rupp@adacore.com>

        * sigtramp-vxworks-target.inc: Set cfa_reg properly from sigcontext
        pregs.
        (CFI_COMMON_REGS): Restore LR jic probed from prologue.
        (REGNO_PC_OFFSET): Change to correct value for Aarch64.

2018-05-21  Jose Ruiz  <ruiz@adacore.com>

        * doc/gnat_ugn/gnat_utility_programs.rst, exp_attr.adb,
        libgnarl/s-tassta.adb: Minor typo fixes

2018-05-21  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch4.adb (Analyze_One_Call): Recognize complex cases where an
        indexed call originally in prefix forn is itself the prefix of a
        further call.

2018-05-21  Piotr Trojanek  <trojanek@adacore.com>

        * sem_eval.adb (Is_Null_Range): Clarify access to the full view of a
        type.
        (Not_Null_Range): Same as above.

2018-05-21  Hristian Kirtchev  <kirtchev@adacore.com>

        * exp_ch3.adb: Minor reformatting.
        * exp_ch6.adb: Likewise.
        * freeze.adb: Likewise.
        * inline.adb: Likewise.
        * sem_util.adb: Likewise.

2018-05-21  Yannick Moy  <moy@adacore.com>

        * inline.adb (Expand_Inlined_Call.Process_Formals): Use a type
        conversion instead of an unchecked type conversion when inlining a
        return statement, unless type qualification is required (for character
        and string literal) or no check can result from the conversion (for
        access types).
        * opt.ads: Update comment.

2018-05-21  Hristian Kirtchev  <kirtchev@adacore.com>

        * sem_ch6.adb (Analyze_Subprogram_Body_Helper): Install the elaboration
        model of the compilation unit spec, if any.
        * sem_ch7.adb (Analyze_Package_Body_Helper): Install the elaboration
        model of the compilation unit spec, if any.
        * sem_ch10.adb (Analyze_Subunit): Install the elaboration model of the
        parent compilation unit spec, if any.
        * sem_elab.adb (Check_Elaboration_Scenarios): Restore the elaboration
        model of the main unit.
        (Is_Same_Unit): The routine now uses Unit_Entity.
        (Is_Subunit): Removed.
        (Normalize_Unit): Removed.
        (Unit_Entity): New routine.
        * sem_prag.adb (Analyze_Pragma): Reimplement the handling of pragma
        Elaboration_Checks. The analysis now ensures that the pragma appears at
        the configuration level, and on the initial declaration of a unit.
        Other placements are either flagged as illegal, or ignored.
        (Check_Duplicate_Elaboration_Checks_Pragma): New routine.
        (Ignore_Elaboration_Checks_Pragma): New routine.
        * sem_util.adb (Install_Elaboration_Model): New routine.
        * sem_util.ads (Install_Elaboration_Model): New routine.
        * doc/gnat_rm/implementation_defined_pragmas.rst: Update the
        documentation of pragma Elaboration_Checks.
        * gnat_rm.texi: Regenerate.

2018-05-21  Olivier Hainque  <hainque@adacore.com>

        * libgnat/s-trasym__dwarf.adb (Executable_Name): Return argv[0] instead
        of empty string when argv[0] couldn't be found on PATH.
        (Enable_Cache): Raise Program_Error instead of attempting a null
        pointer dereference when the Exec_Module initialization failed.

2018-05-21  Piotr Trojanek  <trojanek@adacore.com>

        * libgnarl/a-reatim.ads (Clock_Time): Remove External aspect.
        * libgnarl/a-taside.ads (Tasking_State): Likewise.
        * libgnat/a-calend.ads (Clock_Time): Likewise.

2018-05-21  Yannick Moy  <moy@adacore.com>

        * sem_ch6.adb (Analyze_Procedure_Call): Refine test to recognize prefix
        call notation in inlined call in GNATprove mode.

2018-05-21  Hristian Kirtchev  <kirtchev@adacore.com>

        * einfo.adb (Is_External_State): An abstract state is also external
        when it is declared with option "synchronous".
        * einfo.ads: Update the documentation of synthesized attribute
        Is_External_State.
        * sem_util.adb (Find_Simple_Properties): New routine.
        (Is_Enabled_External_Property): New routine.
        (State_Has_Enabled_Property): Reimplemented. The two flavors of option
        External have precedence over option Synchronous when determining
        whether a property is in effect.

2018-05-21  Yannick Moy  <moy@adacore.com>

        * sem_eval.adb (Static_Length): Take into account case of variable of
        subtype string literal.

2018-05-21  Olivier Hainque  <hainque@adacore.com>

        * libgnat/s-objrea.ads (Get_Memory_Bounds): Rename as Get_Xcode_Bounds.
        (Object_Section): Rename Flag_Alloc component as Flag_Xcode.
        * libgnat/s-objrea.adb (Get_Xcode_Bounds): Adjust to new subprogram and
        component name.
        (Get_Section, ELF case): Set Flag_Xcode from SHF_EXECINSTR.
        * libgnat/s-dwalin.adb (Open): Adjust to the Get_Memory_Bounds name
        change.

2018-05-21  Olivier Hainque  <hainque@adacore.com>

        * libgnat/s-dwalin.ads (Dwarf_Context): Change type of Load_Address to
        Address, and type of Low, High to Storage_Offset.
        (Low): Rename as Low_Address and convey that the return value is a
        runtime reference accounting for a load address.
        * libgnat/s-dwalin.adb (Read_Aranges_Entry): Adjust to the
        address/offset type changes.
        (Aranges_Lookup): Likewise.
        (Symbolic_Address): Likewise.
        (Symbolic_Traceback): Likewise.
        (Dump_Cache): Likewise.
        (Is_Inside): Likewise.
        (Open): Likewise.
        (Set_Load_Address): Likewise.
        (Low_Address): Likewise, and account for C.Load_Address.
        * libgnat/s-trasym__dwarf.adb (Lt): Use Low_Address instead of Low.
        (Multi_Module_Symbolic_Traceback): Compare address in traceback
        with module Low_Address instead of Low.

2018-05-21  Olivier Hainque  <hainque@adacore.com>

        * libgnat/s-dwalin.ads (Dwarf_Context): Rename Load_Slide as
        Load_Address.
        * libgnat/s-dwalin.adb (Is_Inside): Adjust accordingly.
        (Set_Load_Address): Likewise.
        (Symbolic_Traceback): Likewise.

2018-05-21  Olivier Hainque  <hainque@adacore.com>

        * libgnat/s-trasym__dwarf.adb (Add_Module_To_Cache): Expect a
        Load_Address argument and pass it down to Init_Module.
        * libgnat/s-tsmona__linux.adb (Build_Cache_For_All_Modules): Pass
        lm.l_addr as the Load_Address to Add_Module_To_Cache.

2018-05-21  Piotr Trojanek  <trojanek@adacore.com>

        * einfo.adb (Has_Discriminants): Stronger assertion.
        (Set_Has_Discriminants): Stronger assertion.
        * sem_ch13.adb (Push_Scope_And_Install_Discriminants): Adapt to respect
        the stronger assertion on Has_Discriminant.
        (Uninstall_Discriminants_And_Pop_Scope): Same as above.
        * sem_util.adb (New_Copy_Tree): Same as above.
        * sem_ch7.adb (Generate_Parent_References): Prevent calls to
        Has_Discriminant on non-type entities that might happen when the
        compiled code has errors.
        * sem_ch3.adb (Derived_Type_Declaration): Only call
        Set_Has_Discriminant on type entities.

2018-05-21  Arnaud Charlet  <charlet@adacore.com>

        * exp_unst.adb (Unnest_Subprogram): Unnest all subprograms relevant for
        code generation.

2018-05-21  Piotr Trojanek  <trojanek@adacore.com>

        * lib.ads: Fix typo in enumeration in comment.

2018-05-21  Ed Schonberg  <schonberg@adacore.com>

        * sem_attr.adb (Analyze_Attribute, case Scalar_Storage_Order): The
        attribute reference is legal within a generic unit when the prefix is a
        formal private type.

2018-05-21  Hristian Kirtchev  <kirtchev@adacore.com>

        * exp_ch7.adb (Establish_Transient_Scope): Code cleanup. Do not
        delegate the secondary stack management when there is no suitable
        transient context, and the transient scope was intended to manage the
        secondary stack because this causes premature reclamation. Change the
        transient scope creation logic by special casing assignment statements
        of controlled components for type initialization procedures.
        (Find_Node_To_Be_Wrapped): Renamed to Find_Transient_Context. Update
        the comment on usage.
        (Find_Transient_Context): Change the initinte loop into a while loop.
        Iterations schemes and iterator specifications are not valid transient
        contexts because they rely on special processing. Assignment statements
        are now treated as a normal transient context, special cases are
        handled by the caller. Add special processing for pragma Check.
        (Is_OK_Construct): Removed. Its functionality has been merged in
        routine Find_Transient_Context.
        * sem_ch5.adb (Check_Call): Reimplemented. Add code to properly
        retrieve the subprogram being invoked. Use a more accurate predicate
        (Requires_Transient_Scope) to determine that the function will emply
        the secondary stack.

2018-05-21  Piotr Trojanek  <trojanek@adacore.com>

        * ada_get_targ.adb: Fix subprogram body headers.
        * adabkend.adb: Likewise.
        * checks.adb: Likewise.
        * exp_ch3.adb: Likewise.
        * exp_ch5.adb: Likewise.
        * exp_ch9.adb: Likewise.
        * exp_dist.adb: Likewise.
        * exp_tss.adb: Likewise.
        * inline.adb: Likewise.
        * lib-writ.adb: Likewise.
        * lib-xref-spark_specific.adb: Likewise.
        * libgnarl/s-osinte__darwin.adb: Likewise.
        * libgnarl/s-stusta.adb: Likewise.
        * libgnarl/s-taprop__solaris.adb: Likewise.
        * libgnarl/s-tposen.adb: Likewise.
        * libgnarl/s-vxwext__kernel-smp.adb: Likewise.
        * libgnarl/s-vxwext__kernel.adb: Likewise.
        * libgnat/a-btgbso.adb: Likewise.
        * libgnat/a-cfdlli.adb: Likewise.
        * libgnat/a-cfhama.adb: Likewise.
        * libgnat/a-cfinve.adb: Likewise.
        * libgnat/a-cimutr.adb: Likewise.
        * libgnat/a-coboho.adb: Likewise.
        * libgnat/a-cofove.adb: Likewise.
        * libgnat/a-cofuve.adb: Likewise.
        * libgnat/a-comutr.adb: Likewise.
        * libgnat/a-exexda.adb: Likewise.
        * libgnat/a-tags.adb: Likewise.
        * libgnat/a-tideau.adb: Likewise.
        * libgnat/a-wtdeau.adb: Likewise.
        * libgnat/a-ztdeau.adb: Likewise.
        * libgnat/g-alleve.adb: Likewise.
        * libgnat/s-excdeb.adb: Likewise.
        * libgnat/s-parint.adb: Likewise.
        * libgnat/s-shasto.adb: Likewise.
        * libgnat/s-traceb__hpux.adb: Likewise.
        * prepcomp.adb: Likewise.
        * sem_ch4.adb: Likewise.
        * sem_ch6.adb: Likewise.
        * sem_dist.adb: Likewise.
        * sem_prag.adb: Likewise.
        * sem_util.adb: Likewise.
        * sinfo.adb: Likewise.
        * switch.adb: Likewise.

2018-05-04  John Marino  <gnugcc@marino.st>

        PR ada/85635
        * link.c (BSD platforms): Add missing backslash.

2018-04-27  Eric Botcazou  <ebotcazou@adacore.com>

        PR ada/85540
        * init.c (__gnat_handle_vms_condition): Add missing parentheses.

2018-04-25  Eric Botcazou  <ebotcazou@adacore.com>

        PR ada/85007
        * gnat_ugn.texi: Regenerate.

2018-03-23  Eric Botcazou  <ebotcazou@adacore.com>

        PR ada/85007
        * gnatlink.adb (Gnatlink): Remove handling of -b switch.
        * doc/gnat_ugn/building_executable_programs_with_gnat.rst (gnatlink):
        Remove documentation of -b switch.

2018-03-23  Eric Botcazou  <ebotcazou@adacore.com>

        PR ada/85036
        * gnatlink.adb (Process_Args): Drop existing link switches if multiple
        switches are passed for --LINK.

2018-03-12  Eric Botcazou  <ebotcazou@adacore.com>

        PR ada/82813
        * gcc-interface/misc.c (gnat_post_options): Disable string overflow
        warnings.

2018-03-10  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/trans.c (node_has_volatile_full_access) <N_Identifier>:
        Consider only entities for objects.

2018-03-07  Sebastian Huber  <sebastian.huber@embedded-brains.de>

        * gcc-interface/Makefile.in (OSCONS_CPP): Remove redundant
        $(GNATLIBCFLAGS).
        (OSCONS_EXTRACT): Add $(GNATLIBCFLAGS_FOR_C).

2018-03-06  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/trans.c (convert_with_check): Fix typo in the condition
        guarding the overflow check emitted for the upper bound of a floating-
        point conversion.

2018-03-06  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/utils.c (def_builtin_1): Bail out on error_mark_node.

2018-02-28  Eric Botcazou  <ebotcazou@adacore.com>

        * libgnat/i-cexten.ads (Float_128): New type.

2018-02-02  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (array_type_has_nonaliased_component): Return
        false if the component type is a pointer.

2018-01-11  Gary Dismukes  <dismukes@adacore.com>

        * exp_ch3.adb (Default_Initialize_Object): Call New_Copy_Tree on the
        result of Get_Simple_Init_Value and pass the source location of the
        object declaration's object_definition.

2018-01-11  Ed Schonberg  <schonberg@adacore.com>

        * exp_ch6.adb (Make_Build_In_Place_Call_In_Object_Declaration): Handle
        properly object declarations with initializations that are
        build-in-place function calls, when there is an address specification,
        either as an aspect specification or an explicit attribute
        specification clause, for the initialized object.
        * freeze.adb (Check_Address_Clause): Do not remove side-effects from
        initial expressions in the case of a build-in-place call.

2018-01-11  Piotr Trojanek  <trojanek@adacore.com>

        * sem_eval.adb (Is_Null_Range): Retrieve the full view when called on a
        private (sub)type; refactor to avoid early return statement.
        (Not_Null_Range): Same as above.

2018-01-11  Hristian Kirtchev  <kirtchev@adacore.com>

        * freeze.adb (Freeze_Entity): Ensure that a Ghost type is not
        concurrent, nor effectively volatile.
        * ghost.adb (Check_Ghost_Type): New routine.
        * ghost.ads (Check_Ghost_Type): New routine.
        * sem_util.adb (Is_Declaration): Reimplemented. The routine can now
        consider specific subsets of declarations.
        (Is_Declaration_Other_Than_Renaming): Removed. Its functionality is
        replicated by Is_Declaration.
        * sem_util.ads (Is_Declaration): New parameter profile. Update the
        comment on usage.
        (Is_Declaration_Other_Than_Renaming): Removed.

2018-01-11  Hristian Kirtchev  <kirtchev@adacore.com>

        * sem_ch5.adb (Analyze_Assignment): Assignments to variables that act
        as Part_Of consituents of single protected types are illegal when they
        take place inside a protected function.
        (Diagnose_Non_Variable_Lhs): Use Within_Function to check for an
        enclosing function.
        (Is_Protected_Part_Of_Constituent): New routine.
        (Within_Function): New routine.

2018-01-11  Arnaud Charlet  <charlet@adacore.com>

        Bump copyright notices to 2018.

2018-01-11  Hristian Kirtchev  <kirtchev@adacore.com>

        * binde.adb, par-ch6.adb, par-ch9.adb, sem_ch12.adb, sem_ch13.adb:
        Minor reformatting.

2018-01-11  Justin Squirek  <squirek@adacore.com>

        * par-ch6.adb (Scan_Body_Or_Expression_Function): Add additional check
        to make sure a given expression function is properly parenthesized.

2018-01-11  Hristian Kirtchev  <kirtchev@adacore.com>

        * sem_ch6.adb (Analyze_Subprogram_Body_Helper): Check the
        categorization of a subprogram body which does not complete a previous
        declaration.

2018-01-11  Hristian Kirtchev  <kirtchev@adacore.com>

        * sem_ch10.adb (Check_Private_Child_Unit): Ensure that the enclosing
        scope of package Ada is Standard.

2018-01-11  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch13.adb (Replace_Type_Ref): Handle properly reference to a
        subcomponent of the current entity when building the body for a dynamic
        predicate function for a record with composite subcomponents.

2018-01-11  Hristian Kirtchev  <kirtchev@adacore.com>

        * exp_aggr.adb (Convert_Aggr_In_Object_Decl): Update the call to
        Establish_Transient_Scope.
        (Convert_To_Assignments): Update the call to Establish_Transient_Scope.
        (Expand_Array_Aggregate): Update the call to Establish_Transient_Scope.
        * exp_ch6.adb (Expand_Call_Helper): Update the call to
        Establish_Transient_Scope.
        (Make_Build_In_Place_Call_In_Object_Declaration): Update the call to
        Establish_Transient_Scope.
        * exp_ch7.adb (Establish_Transient_Scope): Restructured. Delegate the
        management of the secondary stack to an enclosing scope if there is no
        suitable construct to wrap, and the transient scope was intended to
        manage the secondary stack.
        (Find_Node_To_Be_Wrapped): Restructured. A case_statement_alternative
        is a valid boundary for a transient expression which comes from the
        statements of the alternative, otherwise alternatives cannot be
        wrapped. Assignments of controlled objects which have controlled
        actions suppressed now stop the traversal as there is no point in
        looking for an enclosing construct. Add several N_xxx_Body choices to
        the termination conditions for completeness.
        * exp_ch7.ads (Establish_Transient_Scope): Update the parameter profile
        and the associated comment on usage.
        * exp_smem.adb (Add_Shared_Var_Lock_Procs): Update the call to
        Establish_Transient_Scope.
        (Add_Write_After): Update the call to Establish_Transient_Scope.
        * sem_res.adb (Check_Initialization_Call): Removed.
        (Resolve_Actuals): Account for additional cases where finalization
        actions are required by utilizing predicate Needs_Finalization rather
        than Is_Controlled.
        (Resolve_Call): Type initialization procedures can now utilize
        transient scopes to manage the secondary stack, thus preventing leaks
        during initialization.  Remove the previous kludgy algorithm which
        attempts to manage the secondary stack at the object creation site.

2018-01-11  Jerome Lambourg  <lambourg@adacore.com>

        * libgnat/g-soliop__qnx.ads: New.
        * adaint.c, adaint.h, cstreams.c, s-oscons-tmplt.c, sysdep.c: Update
        for QNX.

2018-01-11  Bob Duff  <duff@adacore.com>

        * par-ch9.adb (P_Protected_Operation_Declaration_Opt): Give an error if
        a null procedure occurs in a protected definition.

2018-01-11  Bob Duff  <duff@adacore.com>

        * binderr.ads, namet.ads: Minor reformatting.

2018-01-11  Bob Duff  <duff@adacore.com>

        * doc/gnat_ugn/gnat_utility_programs.rst: Improve documentation of
        xml2gnat.

2018-01-11  Bob Duff  <duff@adacore.com>

        * binde.adb (Force_Elab_Order): Give an error if there are duplicate
        unit names.

2018-01-11  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch6.adb (Freeze_Expr_Types): If an access value is the
        controlling argument of a dispatching call. freeze the corresponding
        designated type.

2018-01-11  Ben Brosgol  <brosgol@adacore.com>

        * doc/Makefile: Add Sphinx option -W to treat warnings as errors.

2018-01-11  Ben Brosgol  <brosgol@adacore.com>

        * doc/gnat_rm/implementation_defined_aspects.rst: Minor type/wording
        corrections.
        * gnat_rm.texi: Regenerate.

2018-01-11  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch12.adb (Check_Fixed_Point_Type): Do not apply check if the
        formsl type corresponding to the actual fixed point type is private,
        because in this case there can be no suspicious arithmetic operations
        in the generic unless they reference a formal subprogram.  Clarify
        warning.

2018-01-11  Javier Miranda  <miranda@adacore.com>

        * exp_util.adb (Remove_Side_Effects): No action done for functions
        returning class-wide types since it requires generating code using
        'reference and the CCG target has no secondary stack.
        * gnat1drv.adb: Disable building static dispatch tables when generating
        C code.

2018-01-11  Piotr Trojanek  <trojanek@adacore.com>

        * libgnat/a-direio.ads, libgnat/a-sequio.ads, libgnat/a-ststio.ads,
        libgnat/a-textio.ads, libgnat/a-witeio.ads, libgnat/a-ztexio.ads
        (File_Type): Add Default_Initial_Condition aspect.

2018-01-11  Pascal Obry  <obry@adacore.com>

        * libgnat/s-os_lib.adb (Normalize_Pathname): New implementation.

2018-01-11  Bob Duff  <duff@adacore.com>

        * doc/gnat_ugn/gnat_utility_programs.rst: Rewrite gnatpp documentation
        to match what the Libadalang-based version does.
        * doc/gnat_ugn/about_this_guide.rst: Update reference.

2018-01-11  Hristian Kirtchev  <kirtchev@adacore.com>

        * sem_res.adb (Uses_SS): A controlled type requires the secondary stack
        if it contains at least one component declaration employing a function
        call returning on the secondary stack.

2018-01-11  Yannick Moy  <moy@adacore.com>

        * doc/gnat_rm/standard_and_implementation_defined_restrictions.rst:
        Update description of restriction SPARK_05 with SPARK 2014.
        * gnat_rm.texi: Regenerate.

2018-01-11  Vasiliy Fofanov  <fofanov@adacore.com>

        * doc/gnat_ugn/gnat_utility_programs.rst: Fix layout.

2018-01-11  Hristian Kirtchev  <kirtchev@adacore.com>

        * exp_aggr.adb, exp_ch9.adb, exp_util.adb, sem_aggr.adb, sem_ch3.adb,
        sem_res.adb, sem_util.adb: Minor reformatting.

2018-01-11  Ed Schonberg  <schonberg@adacore.com>

        * sem_prag.adb (Analyze_Pragma, case Predicate): Indicate that the type
        has a delayed aspect which must be processed at the point the type is
        frozen. This mimics what is done when the predicate is provided by a
        source aspect.

2018-01-11  Doug Rupp  <rupp@adacore.com>

        * init.c (vxworks): Add macro checks for __aarch64__.

2018-01-11  Hristian Kirtchev  <kirtchev@adacore.com>

        * exp_util.adb (Add_Failure_Expression): New routine.
        (Make_Predicate_Check): Reimplement the handling of Predicate_Failure.
        * sem_util.adb (Is_Current_Instance): Code cleanup.

2018-01-11  Patrick Bernardi  <bernardi@adacore.com>

        * libgnat/s-parame*.adb, libgnat/s-parame*.ads: Remove unneeded
        Default_Sec_Stack_Size.
        * libgnat/s-secsta.adb (SS_Allocate): Handle the fixed secondary stack
        limit check so that the integer index does not overflow. Check the
        dynamic stack allocation does not cause the secondary stack pointer to
        overflow.
        (SS_Info): Align colons.
        (SS_Init): Cover the case when bootstraping with an old compiler that
        does not set Default_SS_Size.

2018-01-11  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch3.adb (Add_Internal_Interface_Entities): When checking the
        legality of an inherited operation that may require overriding, ignore
        primitive_wrappers that correspond to explicit operations that override
        an interface primitive.
        * exp_util.adb (Build_Class_Wide_Expression, Replace_Entity): If the
        operation to which the class-wide expression applies is a protected op.
        with a primitive_wrapper, verify that the updated inherited expression
        does not contain an internal call to a protected function.  This
        completes the implementation of AI12-0166.

2018-01-11  Hristian Kirtchev  <kirtchev@adacore.com>

        * ali.adb: Document the remaining letters available for ALI lines.
        (Scan_ALI): A with clause is internal when it is encoded on a 'Z' line.
        * ali.ads: Update type With_Record. Field
        Implicit_With_From_Instantiation is no longer in use. Add field
        Implicit_With.
        * csinfo.adb (CSinfo): Remove the setup for attribute
        Implicit_With_From_Instantiation.
        * lib-writ.adb (Collect_Withs): Correct the logic which marks a unit as
        either implicitly or explicitly withed.
        (Is_Implicit_With_Clause): New routine.
        (Write_ALI): Rename array Implicit_With to Has_Implicit_With to avoid
        confusion with the with clause attribute by the same name.
        (Write_With_Lines): Update the emission of 'W', 'Y', and 'Z' headers.
        * rtsfind.adb (Maybe_Add_With): Code cleanup.
        * sem_ch8.adb (Present_System_Aux): Code cleanup.
        * sem_ch10.adb (Expand_With_Clause): Mark the with clause as generated
        for a parent unit.
        (Implicit_With_On_Parent): Mark the with clause as generated for a
        parent unit.
        * sem_ch12.adb (Inherit_Context): With clauses inherited by an
        instantiation are no longer marked as Implicit_With_From_Instantiation
        because they are already marked as implicit.
        * sem_elab.adb (Ensure_Prior_Elaboration_Static): Remove the kludge
        which marks implicit with clauses as related to an instantiation.
        * sinfo.adb (Implicit_With_From_Instantiation): Removed.
        (Parent_With): New routine.
        (Set_Implicit_With_From_Instantiation): Removed.
        (Set_Parent_With): New routine.
        * sinfo.ads: Update the documentation of attribute Implicit_With.
        Remove attribute Implicit_With_From_Instantiation along with
        occurrences in nodes.  Add attribute Parent_With along with occurrences
        in nodes.
        (Implicit_With_From_Instantiation): Removed along with pragma Inline.
        (Parent_With): New routine along with pragma Inline.
        (Set_Implicit_With_From_Instantiation): Removed along with pragma Inline.
        (Set_Parent_With): New routine along with pragma Inline.

2018-01-11  Hristian Kirtchev  <kirtchev@adacore.com>

        * sem_util.adb (Find_Enclosing_Scope): Return the unique defining
        entity when the enclosing construct is a body.

2018-01-11  Patrick Bernardi  <bernardi@adacore.com>

        * exp_ch9.adb (Expand_N_Task_Type_Declaration): Simplified
        Secondary_Stack_Size handling as a pragma is now generated for the
        corresponding aspect instead of an attribute.  Pragma expression is
        relocated instead of evaluated. Discriminant of the corresponding
        record type is referenced rather than the type discriminant.
        (Create_Secondary_Stack_For_Task, Make_Task_Create_Call): Update
        Secondary_Stack_Size rep item checks to only look for the pragma rep.
        * sem_ch13.adb (Analyze_One_Aspect): Transform
        Aspect_Secondary_Stack_Size into a pragma instead of an attribute
        because the attribute does not have visibility on a task type's
        discriminants when the type's definition is expanded.
        (Analyze_Attribute_Definition_Clause): Remove handling of
        Attribute_Secondary_Stack_Size.
        * snames.adb-tmpl, snames.ads-tmpl: Remove
        Attribute_Secondary_Stack_Size, no longer used.

2018-01-11  Justin Squirek  <squirek@adacore.com>

        * sem_ch8.adb: Minor comment fix.

2018-01-11  Hristian Kirtchev  <kirtchev@adacore.com>

        * exp_ch4.adb (Process_Action): Do not abandon the inspection of an
        individual action because the action may denote a complex expression,
        such as a case statement, which in turn may contain additional
        transient objects.

2018-01-11  Ed Schonberg  <schonberg@adacore.com>

        * sem_aggr.adb (Resolve_Iterated_Component_Association): Perform
        analysis on a copy of the expression with a copy of the index variable,
        because full expansion will rewrite construct into a loop with the
        original loop variable.
        * exp_aggr.adb (Gen_Assign): Defer analysis and resolution if the
        expression is an iterated component association. Full analysis takes
        place when construct is rewritten as a loop.
        (In_Place_Assign_OK, Safe_Component): An iterated_component_association
        is not safe for in-place assignment.
        * sem_util.adb (Remove_Entity): Handle properly the case of an isolated
        entity with no homonym and no other entity in the scope.

2018-01-11  Justin Squirek  <squirek@adacore.com>

        * sem_prag.adb (Analyze_Pragma:Pragma_Loop_Variant): Modify error
        message to be printed on the pragma argument identifier.

2018-01-11  Hristian Kirtchev  <kirtchev@adacore.com>

        * exp_util.adb (Build_Invariant_Procedure_Declaration): Set the last
        entity of the generated invariant procedure in order to construct a
        proper entity chain.

2018-01-11  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch13.adb (Build_Predicate_Functions): Fix minor issues in
        comment.

2018-01-11  Arnaud Charlet  <charlet@adacore.com>

        * einfo.ads, einfo.adb (Activation_Record_Component,
        Set_Activation_Record_Component, Set_Is_Uplevel_Referenced_Entity):
        Allow E_Discriminant.

2018-01-10  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_component_type): Apply the check
        for atomic access once the component size is taken into account and
        also do it if the component type is Atomic or Volatile_Full_Access.

2018-01-04  Eric Botcazou  <ebotcazou@adacore.com>

        * gnatvsn.ads: Bump copyright year.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * gcc-interface/misc.c (enumerate_modes): Treat GET_MODE_BITSIZE
        as polynomial.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * gcc-interface/misc.c (enumerate_modes): Treat GET_MODE_PRECISION
        as polynomial.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * gcc-interface/utils.c (gnat_types_compatible_p): Handle
        polynomial TYPE_VECTOR_SUBPARTS.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * gcc-interface/misc.c (enumerate_modes): Handle polynomial
        GET_MODE_NUNITS.

2018-01-03  Jakub Jelinek  <jakub@redhat.com>

        Update copyright years.

        * gnat_ugn.texi: Bump @copying's copyright year.
        * gnat_rm.texi: Likewise.
\f
Copyright (C) 2018 Free Software Foundation, Inc.

Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.