2017-10-09 Bob Duff <duff@adacore.com>

	* exp_ch6.adb (Make_Build_In_Place_Call_In_Object_Declaration): Use
	Defining_Identifier (Obj_Decl) in two places, because it might have
	changed.
	* exp_ch6.adb (Make_Build_In_Place_Call_In_Allocator): Deal with cases
	involving 'Input on (not visibly) derived types.

2017-10-09  Hristian Kirtchev  <kirtchev@adacore.com>

	* atree.adb: Add new soft link Rewriting_Proc.
	(Rewrite): Invoke the subprogram attached to the rewriting soft link.
	(Set_Rewriting_Proc): New routine.
	* attree.ads: Add new access-to-subprogram type Rewrite_Proc.
	(Set_Rewriting_Proc): New routine.
	* checks.adb (Install_Primitive_Elaboration_Check): Use 'E' character
	for *E*laboration flag to maintain consistency with other elaboration
	flag generating subprograms.
	* debug.adb: Document the new usage of flag -gnatdL.
	* einfo.adb: Node19 is now used as Receiving_Entry.  Node39 is now used
	as Protected_Subprogram.  Flag148 is now used as
	Is_Elaboration_Checks_OK_Id.  Flag302 is now used as
	Is_Initial_Condition_Procedure.
	(Is_Elaboration_Checks_OK_Id): New routine.
	(Is_Initial_Condition_Procedure): New routine.
	(Protected_Subprogram): New routine.
	(Receiving_Entry): New routine.
	(SPARK_Pragma): Update assertion.
	(SPARK_Pragma_Inherited): Update assertion.
	(Suppress_Elaboration_Warnings): Removed.
	(Set_Is_Elaboration_Checks_OK_Id): New routine.
	(Set_Is_Initial_Condition_Procedure): New routine.
	(Set_Protected_Subprogram): New routine.
	(Set_Receiving_Entry): New routine.
	(Set_SPARK_Pragma): Update assertion.
	(Set_SPARK_Pragma_Inherited): Update assertion.
	(Write_Entity_Flags): Update the output for Flag148 and Flag302.
	(Write_Field19_Name): Add output for Receiving_Entry.
	(Write_Field39_Name): Add output for Protected_Subprogram.
	(Write_Field40_Name): Update the output for SPARK_Pragma.
	* einfo.ads: New attributes Is_Elaboration_Checks_OK_Id,
	Is_Initial_Condition_Procedure, Protected_Subprogram, Receiving_Entry.
	Remove attribute Suppress_Elaboration_Warnings.  Update the stricture
	of various entities.
	(Is_Elaboration_Checks_OK_Id): New routine along with pragma Inline.
	(Is_Initial_Condition_Procedure): New routine along with pragma Inline.
	(Protected_Subprogram): New routine along with pragma Inline.
	(Receiving_Entry): New routine along with pragma Inline.
	(Suppress_Elaboration_Warnings): Removed.
	(Set_Is_Elaboration_Checks_OK_Id): New routine along with pragma
	Inline.
	(Set_Is_Initial_Condition_Procedure): New routine along with pragma
	Inline.
	(Set_Protected_Subprogram): New routine along with pragma Inline.
	(Set_Receiving_Entry): New routine along with pragma Inline.
	(Set_Suppress_Elaboration_Warnings): Removed.
	* exp_ch3.adb (Build_Init_Procedure): Use name _Finalizer to maintain
	consistency with other finalizer generating subprograms.
	(Default_Initialize_Object): Mark the block which wraps the call to
	finalize as being part of initialization.
	* exp_ch7.adb (Expand_N_Package_Declaration): Directly expand pragma
	Initial_Condition.
	(Expand_N_Package_Body): Directly expand pragma Initial_Condition.
	(Next_Suitable_Statement): Update the comment on usage. Skip over call
	markers generated by the ABE mechanism.
	* exp_ch9.adb (Activation_Call_Loc): New routine.
	(Add_Accept): Link the accept procedure to the original entry.
	(Build_Protected_Sub_Specification): Link the protected or unprotected
	version to the original subprogram.
	(Build_Task_Activation_Call): Code cleanup. Use a source location which
	is very close to the "begin" or "end" keywords when generating the
	activation call.
	* exp_prag.adb (Expand_Pragma_Initial_Condition): Reimplemented.
	* exp_spark.adb (Expand_SPARK): Use Expand_SPARK_N_Loop_Statement to
	process loops.
	(Expand_SPARK_N_Loop_Statement): New routine.
	(Expand_SPARK_N_Object_Declaration): Code cleanup. Partially insert the
	call to the Default_Initial_Condition procedure.
	(Expand_SPARK_Op_Ne): Renamed to Expand_SPARK_N_Op_Ne.
	* exp_util.adb (Build_DIC_Procedure_Body): Capture the SPARK_Mode in
	effect.
	(Build_DIC_Procedure_Declaration): Capture the SPARK_Mode in effect.
	(Insert_Actions): Add processing for N_Call_Marker.
	(Kill_Dead_Code): Explicitly kill an elaboration scenario.
	* exp_util.ads (Make_Invariant_Call): Update the comment on usage.
	* frontend.adb: Initialize Sem_Elab. Process all saved top level
	elaboration scenarios for ABE issues.
	* gcc-interface/trans.c (gnat_to_gnu): Add processing for N_Call_Marker
	nodes.
	* lib.adb (Earlier_In_Extended_Unit): New variant.
	* sem.adb (Analyze): Ignore N_Call_Marker nodes.
	(Preanalysis_Active): New routine.
	* sem.ads (Preanalysis_Active): New routine.
	* sem_attr.adb (Analyze_Access_Attribute): Save certain
	elaboration-related attributes. Save the scenario for ABE processing.
	* sem_ch3.adb (Analyze_Object_Declaration): Save the SPARK mode in
	effect. Save certain elaboration-related attributes.
	* sem_ch5.adb (Analyze_Assignment): Save certain elaboration-related
	attributes. Save the scenario for ABE processing.
	* sem_ch6.adb (Analyze_Abstract_Subprogram_Declaration): Save the SPARK
	mode in effect. Save certain elaboration-related attributes.
	(Analyze_Subprogram_Body_Helper): Skip N_Call_Marker nodes when
	locating the first real statement.
	(Analyze_Subprogram_Declaration): Save the SPARK mode in effect. Save
	certain elaboration-related attributes.
	* sem_ch7.adb (Analyze_Package_Declaration): Do not suppress
	elaboration warnings.
	* sem_ch8.adb (Attribute_Renaming): Mark a subprogram body which was
	generated for purposes of wrapping an attribute used as a generic
	actual.
	(Find_Direct_Name): Save certain elaboration-related attributes. Save
	the scenario for ABE processing.
	(Find_Expanded_Name): Save certain elaboration-related attributes. Save
	the scenario for ABE processing.
	* sem_ch9.adb (Analyze_Entry_Declaration): Save certain
	elaboration-related attributes.
	(Analyze_Requeue): Save certain elaboration-related attributes. Save
	the scenario for ABE processing.
	(Analyze_Single_Task_Declaration): Save certain elaboration-related
	attributes.
	(Analyze_Task_Type_Declaration): Save certain elaboration-related
	attributes.
	* sem_ch12.adb (Analyze_Generic_Package_Declaration): Save certain
	elaboration-related attributes.
	(Analyze_Generic_Subprogram_Declaration): Save the SPARK mode in
	effect. Save certain elaboration-related attributes.
	(Analyze_Package_Instantiation): Save certain elaboration-related
	attributes.  Save the scenario for ABE processing. Create completing
	bodies in case the instantiation results in a guaranteed ABE.
	(Analyze_Subprogram_Instantiation): Save certain elaboration-related
	attributes Save the scenario for ABE processing. Create a completing
	body in case the instantiation results in a guaranteed ABE.
	(Provide_Completing_Bodies): New routine.
	* sem_elab.ads: Brand new implementation.
	* sem_prag.adb (Analyze_Pragma, cases Elaborate, Elaborate_All,
	Elaborate_Body): Do not suppress elaboration warnings.
	* sem_res.adb (Make_Call_Into_Operator): Set the parent field of the
	operator.
	(Resolve_Call): Save certain elaboration-related attributes. Save the
	scenario for ABE processing.
	(Resolve_Entity_Name): Do not perform any ABE processing here.
	(Resolve_Entry_Call): Inherit certain attributes from the original call.
	* sem_util.adb (Begin_Keyword_Location): New routine.
	(Defining_Entity): Update the parameter profile. Add processing for
	concurrent subunits that are rewritten as null statements.
	(End_Keyword_Location): New routine.
	(Find_Enclosing_Scope): New routine.
	(In_Instance_Visible_Part): Code cleanup.
	(In_Subtree): Update the parameter profile. Add new version.
	(Is_Preelaborable_Aggregate): New routine.
	(Is_Preelaborable_Construct): New routine.
	(Mark_Elaboration_Attributes): New routine.
	(Scope_Within): Update the parameter profile.
	(Scope_Within_Or_Same): Update the parameter profile.
	* sem_util.ads (Begin_Keyword_Location): New routine.
	(Defining_Entity): Update the parameter profile and the comment on
	usage.
	(End_Keyword_Location): New routine.
	(Find_Enclosing_Scope): New routine.
	(In_Instance_Visible_Part): Update the parameter profile.
	(In_Subtree): Update the parameter profile. Add new version.
	(Is_Preelaborable_Aggregate): New routine.
	(Is_Preelaborable_Construct): New routine.
	(Mark_Elaboration_Attributes): New routine.
	(Scope_Within): Update the parameter profile and the comment on usage.
	(Scope_Within_Or_Same): Update the parameter profile and the comment on
	usage.
	* sem_warn.adb (Check_Infinite_Loop_Warning): Use Has_Condition_Actions
	to determine whether a loop has meaningful condition actions.
	(Has_Condition_Actions): New routine.
	* sinfo.adb (ABE_Is_Certain): Removed.
	(Is_Declaration_Level_Node): New routine.
	(Is_Dispatching_Call): New routine.
	(Is_Elaboration_Checks_OK_Node): New routine.
	(Is_Initialization_Block): New routine.
	(Is_Known_Guaranteed_ABE): New routine.
	(Is_Recorded_Scenario): New routine.
	(Is_Source_Call): New routine.
	(Is_SPARK_Mode_On_Node): New routine.
	(No_Elaboration_Check): Removed.
	(Target): New routine.
	(Was_Attribute_Reference): New routine.
	(Set_ABE_Is_Certain): Removed.
	(Set_Is_Declaration_Level_Node): New routine.
	(Set_Is_Dispatching_Call): New routine.
	(Set_Is_Elaboration_Checks_OK_Node): New routine.
	(Set_Is_Initialization_Block): New routine.
	(Set_Is_Known_Guaranteed_ABE): New routine.
	(Set_Is_Recorded_Scenario): New routine.
	(Set_Is_Source_Call): New routine.
	(Set_Is_SPARK_Mode_On_Node): New routine.
	(Set_No_Elaboration_Check): Removed.
	(Set_Target): New routine.
	(Set_Was_Attribute_Reference): New routine.
	* sinfo.ads: Remove attribute ABE_Is_Certain.  Attribute
	Do_Discriminant_Check now utilizes Flag3.  Attribute
	No_Side_Effect_Removal now utilizes Flag17.  Add new node
	N_Call_Marker.  Update the structure of various nodes.
	(ABE_Is_Certain): Removed along with pragma Inline.
	(Is_Declaration_Level_Node): New routine along with pragma Inline.
	(Is_Dispatching_Call): New routine along with pragma Inline.
	(Is_Elaboration_Checks_OK_Node): New routine along with pragma Inline.
	(Is_Initialization_Block): New routine along with pragma Inline.
	(Is_Known_Guaranteed_ABE): New routine along with pragma Inline.
	(Is_Recorded_Scenario): New routine along with pragma Inline.
	(Is_Source_Call): New routine along with pragma Inline.
	(Is_SPARK_Mode_On_Node): New routine along with pragma Inline.
	(No_Elaboration_Check): Removed along with pragma Inline.
	(Target): New routine along with pragma Inline.
	(Was_Attribute_Reference): New routine along with pragma Inline.
	(Set_ABE_Is_Certain): Removed along with pragma Inline.
	(Set_Is_Declaration_Level_Node): New routine along with pragma Inline.
	(Set_Is_Dispatching_Call): New routine along with pragma Inline.
	(Set_Is_Elaboration_Checks_OK_Node): New routine along with pragma
	Inline.
	(Set_Is_Initialization_Block): New routine along with pragma Inline.
	(Set_Is_Known_Guaranteed_ABE): New routine along with pragma Inline.
	(Set_Is_Recorded_Scenario): New routine along with pragma Inline.
	(Set_Is_Source_Call): New routine along with pragma Inline.
	(Set_Is_SPARK_Mode_On_Node): New routine along with pragma Inline.
	(Set_No_Elaboration_Check): Removed along with pragma Inline.
	(Set_Target): New routine along with pragma Inline.
	(Set_Was_Attribute_Reference): New routine along with pragma Inline.
	* sprint.adb (Sprint_Node_Actual): Add an entry for N_Call_Marker.




git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@253559 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 16 insertions, 11 deletions

diff --git a/gcc/ada/sem_attr.adb b/gcc/ada/sem_attr.adb
index 5bedc6c8c12..5aef17df8ec 100644
--- a/gcc/ada/sem_attr.adb
+++ b/gcc/ada/sem_attr.adb
@@ -28,7 +28,6 @@ with Ada.Characters.Latin_1; use Ada.Characters.Latin_1;
 with Atree;    use Atree;
 with Casing;   use Casing;
 with Checks;   use Checks;
-with Debug;    use Debug;
 with Einfo;    use Einfo;
 with Elists;   use Elists;
 with Errout;   use Errout;
@@ -806,6 +805,20 @@ package body Sem_Attr is
               ("prefix of % attribute cannot be enumeration literal");
          end if;
 
+         --  Preserve relevant elaboration-related attributes of the context
+         --  which are no longer available or very expensive to recompute once
+         --  analysis, resolution, and expansion are over.
+
+         Mark_Elaboration_Attributes
+           (N_Id   => N,
+            Checks => True,
+            Modes  => True);
+
+         --  Save the scenario for later examination by the ABE Processing
+         --  phase.
+
+         Record_Elaboration_Scenario (N);
+
          --  Case of access to subprogram
 
          if Is_Entity_Name (P) and then Is_Overloadable (Entity (P)) then
@@ -860,14 +873,6 @@ package body Sem_Attr is
                Kill_Current_Values;
             end if;
 
-            --  In the static elaboration model, treat the attribute reference
-            --  as a call for elaboration purposes.  Suppress this treatment
-            --  under debug flag. In any case, we are all done.
-
-            if not Dynamic_Elaboration_Checks and not Debug_Flag_Dot_UU then
-               Check_Elab_Call (N);
-            end if;
-
             return;
 
          --  Component is an operation of a protected type
@@ -11133,8 +11138,8 @@ package body Sem_Attr is
             --  'Unrestricted_Access or in case of a subprogram.
 
             if Is_Entity_Name (P)
-             and then (Attr_Id = Attribute_Unrestricted_Access
-                        or else Is_Subprogram (Entity (P)))
+              and then (Attr_Id = Attribute_Unrestricted_Access
+                         or else Is_Subprogram (Entity (P)))
             then
                Set_Address_Taken (Entity (P));
             end if;