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make with ada is no more

Daily bump.

• [DBH] gcc/ada/ChangeLog

ada: TSS finalize address subprogram generation for constrained...

...subtypes of unconstrained synchronized private extensions should take
care to designate the corresponding record of the underlying concurrent
type.

When generating TSS finalize address subprograms for class-wide types of
constrained root types, it follows the parent chain looking for the
first "non-constrained" type. It is possible that such a type is a
private extension with the “synchronized” keyword, in which case the
underlying type is a concurrent type. When that happens, the designated
type of the finalize address subprogram should be the corresponding
record’s class-wide-type.

gcc/ada/ChangeLog:
	* exp_ch3.adb (Expand_Freeze_Class_Wide_Type): Expanded comments
	explaining why TSS Finalize_Address is not generated for
	concurrent class-wide types.
	* exp_ch7.adb (Make_Finalize_Address_Stmts): Handle cases where the
	underlying non-constrained parent type is a concurrent type, and
	adjust the designated type to be the corresponding record’s
	class-wide type.

gcc/testsuite/ChangeLog:

	* gnat.dg/sync_tag_finalize.adb: New test.

Signed-off-by: Richard Wai <[email protected]>

• [DBH] gcc/ada/exp_ch3.adb
• [DBH] gcc/ada/exp_ch7.adb

ada: Refine upper array bound for bit packed array

When using bit-packed arrays, the compiler creates new array subtypes of
1-bit component indexed by integers. The existing routine checks the
index subtype to find the min/max values. Bit-packed arrays being
indexed by integers, the routines gives up as returning the maximum
possible integer carries no useful information.

This change adds a simple max_value routine that can evaluate very
simple expressions by substituting variables by their min/max value.
Bit-packed array subtypes are currently declared as:

  subtype bp_array is packed_bytes1 (0 .. integer((1 * Var +  7) / 8 - 1));

The simple max_value evaluator handles the bare minimum for this
expression pattern.

gcc/ada/ChangeLog:

	* gcc-interface/utils.cc (max_value): New.
	* gcc-interface/gigi.h (max_value): New.
	* gcc-interface/decl.cc (gnat_to_gnu_entity) <E_Array_Subtype>:
	When computing gnu_min/gnu_max, try to use max_value if there is
	an initial expression.

• [DBH] gcc/ada/gcc-interface/decl.cc
• [DBH] gcc/ada/gcc-interface/gigi.h
• [DBH] gcc/ada/gcc-interface/utils.cc

ada: Crash processing type invariants on child subprogram

gcc/ada/

	* contracts.adb
	(Has_Public_Visibility_Of_Subprogram): Add missing support for
	child subprograms.

• [DBH] gcc/ada/contracts.adb

ada: Private extensions with the keyword "synchronized" are always limited.

GNAT was relying on synchronized private type extensions deriving from a
concurrent interface to determine its limitedness. This does not cover the case
where such an extension derives a limited interface. RM-7.6(6/2) makes is clear
that "synchronized" in a private extension implies the derived type is limited.
GNAT should explicitly check for the presence of "synchronized" in a private
extension declaration, and it should have the same effect as the presence of
“limited”.

gcc/ada/ChangeLog:

	* sem_ch3.adb (Build_Derived_Record_Type): Treat presence of
	keyword "synchronized" the same as "limited" when determining if a
	private extension is limited.

gcc/testsuite/ChangeLog:

	* gnat.dg/sync_tag_discriminals.adb: New test.
	* gnat.dg/sync_tag_limited.adb: New test.

Signed-off-by: Richard Wai <[email protected]>

• [DBH] gcc/ada/sem_ch3.adb

Daily bump.

• [DBH] gcc/ada/ChangeLog

ada: Explicitly analyze and expand null array aggregates

Null array aggregates have present but empty lists of expressions and
component associations. This confuses the previous code for ordinary
array aggregates, which assumes that if a list of either expressions or
component associations is present, then it is non-empty.

This patch adds explicit handling for null array aggregates to avoid
assertion failures in code for ordinary array aggregates.

gcc/ada/

	* exp_aggr.adb (Build_Array_Aggr_Code): Don't build aggregate code
	for null array aggregates.
	* sem_aggr.adb (Resolve_Array_Aggregate): Don't examine formatting
	of a null array aggregate.

• [DBH] gcc/ada/exp_aggr.adb
• [DBH] gcc/ada/sem_aggr.adb

ada: Fix wrong optimization of extended return for discriminated record type

This happens when the discriminants of the record type have default values.

gcc/ada/ChangeLog:

	* inline.adb (Expand_Inlined_Call): In the case of a function call
	that returns an unconstrained type and initializes an object, set
	the No_Initialization flag on the new declaration of the object.

• [DBH] gcc/ada/inline.adb

ada: Fix internal error on misaligned component with variable nominal size

The back-end cannot handle this kind of components even when they are small.

gcc/ada/

	* exp_util.adb (Component_May_Be_Bit_Aligned): Do not return false
	for a small component of a record type with a variant part.

• [DBH] gcc/ada/exp_util.adb

ada: Fix minor glitch in finish_record_type

The size needs to be rounded up to the storage unit in all cases.

gcc/ada/

	* gcc-interface/utils.cc (finish_record_type): Round the size in
	the padding case as well.

• [DBH] gcc/ada/gcc-interface/utils.cc

ada: Remove GNAT Pro details regarding mold

gcc/ada/

	* doc/gnat_ugn/building_executable_programs_with_gnat.rst: Remove
	extended discussion regarding mold run-time dependencies;
	packaging changes in GNAT Pro have made them obsolete.

• [DBH] gcc/ada/doc/gnat_ugn/building_executable_programs_with_gnat.rst

ada: Fix internal error on aggregate nested in container aggregate

This handles the case where a component association is present.

gcc/ada/

	* exp_aggr.adb (Convert_To_Assignments): In the case of a
	component association, call Is_Container_Aggregate on the parent's
	parent.
	(Expand_Array_Aggregate): Likewise.

• [DBH] gcc/ada/exp_aggr.adb

ada: Clean up scope depth and related code (tech debt)

The main point of this patch is to remove the special case
for Atree.F_Scope_Depth_Value in the Assert that Field_Present
in Get_Field_Value. Pulling on that thread leads to lots
of related cleanup.

gcc/ada/ChangeLog:

	* atree.adb (Node_Kind_Table): Specify parameter explicitly in
	GNAT.Table instantiations. Use fully qualified references instead
	of relying on use clauses.
	(Get_Field_Value): Remove special case for F_Scope_Depth_Value.
	That is, enable the Field_Present check in that case.
	(It was already enabled for all other fields.) Violations of this
	check were already fixed.
	(Print_Node_Statistics): Sort the output in decreasing order of
	frequencies.
	(Print_Field_Statistics): Likewise (sort).
	* accessibility.adb (Accessibility_Level): Pass Allow_Alt_Model in
	recursive calls. Apparently, an oversight.
	(Innermost_Master_Scope_Depth): Need to special-case the 'Old
	attribute and allocators.
	* einfo-utils.ads (Scope_Depth): Use Scope_Kind_Id to get
	predicate checks.
	(Scope_Depth_Set): Likewise.
	(Scope_Depth_Default_0): Likewise.
	* einfo-utils.adb: As for spec.
	* frontend.adb (Frontend): Remove unnecessary "return;".
	* gen_il-types.ads (Scope_Kind): New union type.
	* gen_il-gen-gen_entities.adb (Scope_Kind): New union type.
	* sem.ads: Move "with Einfo.Entities;" from body to spec.
	(Scope_Stack_Entry): Declare Entity to be of Scope_Kind_Id to get
	predicate checks. We had previously been putting non-scopes on the
	scope stack; this prevents such anomalies.
	* sem.adb: Move "with Einfo.Entities;" from body to spec.
	* sem_ch8.ads: Move "with Einfo.Entities;" from body to spec. Add
	"with Types;".
	(Push_Scope): Use Scope_Kind_Id to get predicate checks.
	* sem_ch8.adb: Move "with Einfo.Entities;" from body to spec. Add
	"with Types;".
	(Push_Scope): Use Scope_Kind_Id to get predicate checks.
	(Pop_Scope): Use Scope_Kind_Id on popped entity to get predicate
	checks. This prevents anomalies where a scope pushed onto the
	stack is later mutated to a nonscope before being popped.
	* sem_util.ads (Find_Enclosing_Scope): Add postcondition to ensure
	that the enclosing scope of a node N is not the same node N.
	Clearly, N does not enclose itself.
	* sem_util.adb (Find_Enclosing_Scope): There were several bugs
	where Find_Enclosing_Scope(N) = N. For example, if N is an entity,
	then we would typically go up to its declaration, and then back
	down to the Defining_Entity of the declaration, which is N itself.
	There were other cases where Find_Enclosing_Scope of an entity
	disagreed with Scope. Clearly, Find_Enclosing_Scope and Scope
	should agree (when both are defined). Such bugs caused latent bugs
	in accessibility.adb related to 'Old, and fixing bugs here caused
	such bugs to be revealed. These are fixed by calling Scope when N
	is an entity.

Co-authored-by: Ronan Desplanques <[email protected]>

• [DBH] gcc/ada/accessibility.adb
• [DBH] gcc/ada/atree.adb
• [DBH] gcc/ada/einfo-utils.adb
• [DBH] gcc/ada/einfo-utils.ads
• [DBH] gcc/ada/frontend.adb
• [DBH] gcc/ada/gen_il-gen-gen_entities.adb
• [DBH] gcc/ada/gen_il-types.ads
• [DBH] gcc/ada/sem.adb
• [DBH] gcc/ada/sem.ads
• [DBH] gcc/ada/sem_ch8.adb
• [DBH] gcc/ada/sem_ch8.ads
• [DBH] gcc/ada/sem_util.adb
• [DBH] gcc/ada/sem_util.ads

ada: Fix internal error on expression function with Refined_Post aspect

This occurs when the expression function calls a protected function and the
-gnata switch is specified, because the compiler wrongly freezes the called
function when analyzing the expression function, a fallout of the wrapping
scheme used for the Post and Refined_Post aspects.

gcc/ada/

	* sem_res.adb (Resolve_Call): When the target is an entity, do not
	freeze it if the current scope is the inner wrapper function built
	for an expression function with a Post or Refined_Post aspect.

• [DBH] gcc/ada/sem_res.adb

ada: Crash on creation of extra formals on type extension

Revert previous patch and fix the pending issue.

gcc/ada/

	* accessibility.ads (Needs_Result_Accessibility_Extra_Formal):
	Removed.
	* accessibility.adb (Needs_Result_Accessibility_Level_Param):
	Removed.
	(Needs_Result_Accessibility_Extra_Formal): Removed.
	(Needs_Result_Accessibility_Level): Revert previous patch.
	* sem_ch6.adb (Parent_Subprogram): Handle function overriding an
	enumeration literal.
	(Create_Extra_Formals): Ensure that the parent subprogram has all
	its extra formals.

• [DBH] gcc/ada/accessibility.adb
• [DBH] gcc/ada/accessibility.ads
• [DBH] gcc/ada/sem_ch6.adb

ada: Generate runtime restrictions list when the standard library is suppressed

With the introduction of Jorvik support into the light-tasking runtime comes
the requirement to detect voliations of runtime restrictions (for example
Max_Entry_Queue_Length) where previously they could be hard coded in the
runtime. This means we now need the binder to populate
System.System.Restrictions.Run_Time_Restrictions when the standard library
is suppressed.

gcc/ada/

	* bindgen.adb (Gen_Adainit): Generate restrictions when standard
	library is suppressed.
	(Gen_Output_File_Ada): Ditto.
	(Gen_Restrictions): Ditto.

• [DBH] gcc/ada/bindgen.adb

ada: Do not perform local-exception-to-goto optimization on barrier functions

The local-exception-to-goto optimization is no longer applied to entry
barrier functions as entry barriers cannot contain exception handlers and
this optimization interferes with another optimization that occurs for
simple barrier functions.

In particular, the simple barrier optimization removes the push error label
statements generated by the local-exception-to-goto optimization. This
causes a Storage_Error in GIGI when the restriction No_Exception_Propagation
is  active and a protected object contains more than one simple entry
barrier.

gcc/ada/

	* exp_ch6.adb (Expand_N_Subprogram_Body): Do not perform
	local-exception-to- goto optimization on barrier functions.
	* exp_ch9.adb (Expand_Entry_Barrier): Simplify the if statement
	around the simple barrier optimization and remove an old, no
	longer relevant comment.

• [DBH] gcc/ada/exp_ch6.adb
• [DBH] gcc/ada/exp_ch9.adb