2015-05-26 Hristian Kirtchev <kirtchev@adacore.com>

	* exp_ch3.adb (Expand_N_Full_Type_Declaration): Capture, set and
	restore the Ghost mode.
	(Expand_N_Object_Declaration): Capture, set and restore the Ghost mode.
	(Freeze_Type): Update the call to Set_Ghost_Mode.
	(Restore_Globals): New routine.
	* exp_ch5.adb Add with and use clauses for Ghost.
	(Expand_N_Assignment_Statement): Capture, set and restore the
	Ghost mode.
	(Restore_Globals): New routine.
	* exp_ch6.adb Add with and use clauses for Ghost.
	(Expand_N_Procedure_Call_Statement): Capture, set and
	restore the Ghost mode.
	(Expand_N_Subprogram_Body):
	Code cleanup. Capture, set and restore the Ghost mode.
	(Expand_N_Subprogram_Declaration): Capture, set and restore the
	Ghost mode.
	(Restore_Globals): New routine.
	* exp_ch7.adb Add with and use clauses for Ghost.
	(Expand_N_Package_Body): Capture, set and restore the Ghost mode.
	(Expand_N_Package_Declaration): Capture, set and restore the
	Ghost mode.
	(Wrap_HSS_In_Block): Create a proper identifier for the block.
	* exp_ch8.adb Add with and use clauses for Ghost.
	(Expand_N_Exception_Renaming_Declaration): Code
	cleanup. Capture, set and restore the Ghost mode.
	(Expand_N_Object_Renaming_Declaration): Capture, set and restore
	the Ghost mode.
	(Expand_N_Package_Renaming_Declaration): Capture, set and restore the
	Ghost mode.
	(Expand_N_Subprogram_Renaming_Declaration): Capture, set and
	restore the Ghost mode.
	* exp_ch11.adb (Expand_N_Exception_Declaration): Code
	cleanup. Capture, set and restore the Ghost mode.
	* exp_disp.adb (Make_DT): Update the call to Set_Ghost_Mode. Do
	not initialize the dispatch table slot of a Ghost subprogram.
	* exp_prag.adb Add with and use clauses for Ghost.
	(Expand_Pragma_Check): Capture, set and restore the Ghost mode.
	(Expand_Pragma_Contract_Cases): Capture, set and restore the
	Ghost mode.
	(Expand_Pragma_Initial_Condition): Capture, set and
	restore the Ghost mode.
	(Expand_Pragma_Loop_Variant): Capture,
	set and restore the Ghost mode.
	(Restore_Globals): New routine.
	* exp_util.adb Add with and use clauses for Ghost.
	(Make_Predicate_Call): Code cleanup. Capture, set and restore
	the Ghost mode.
	(Restore_Globals): New routine.
	* freeze.adb (Freeze_Entity): Code cleanup. Update the call
	to Set_Ghost_Mode.
	* ghost.adb Add with and use clause for Sem_Prag.
	(Check_Ghost_Completion): Code cleanup.
	(Check_Ghost_Overriding): New routine.
	(Check_Ghost_Policy): Code cleanup.
	(Ghost_Entity): New routine.
	(Is_Ghost_Declaration): Removed.
	(Is_Ghost_Statement_Or_Pragma): Removed.
	(Is_OK_Context): Reimplemented.
	(Is_OK_Declaration): New routine.
	(Is_OK_Pragma): New routine.
	(Is_OK_Statement): New routine.
	(Mark_Full_View_As_Ghost): New routine.
	(Mark_Pragma_As_Ghost): New routine.
	(Mark_Renaming_As_Ghost): New routine.
	(Propagate_Ignored_Ghost_Code): Update the comment on usage.
	(Set_From_Entity): New routine.
	(Set_From_Policy): New routine.
	(Set_Ghost_Mode): This routine now handles pragmas and freeze nodes.
	(Set_Ghost_Mode_For_Freeze): Removed.
	(Set_Ghost_Mode_From_Entity): New routine.
	(Set_Ghost_Mode_From_Policy): Removed.
	* ghost.ads (Check_Ghost_Overriding): New routine.
	(Mark_Full_View_As_Ghost): New routine.
	(Mark_Pragma_As_Ghost): New routine.
	(Mark_Renaming_As_Ghost): New routine.
	(Set_Ghost_Mode): Update the parameter profile. Update the
	comment on usage.
	(Set_Ghost_Mode_For_Freeze): Removed.
	(Set_Ghost_Mode_From_Entity): New routine.
	* sem_ch3.adb (Analyze_Full_Type_Declaration):
	Capture and restore the Ghost mode. Mark a type
	as Ghost regardless of whether it comes from source.
	(Analyze_Incomplete_Type_Decl): Capture, set and restore the
	Ghost mode.
	(Analyze_Number_Declaration): Capture and restore the Ghost mode.
	(Analyze_Object_Declaration): Capture and restore the Ghost mode.
	(Analyze_Private_Extension_Declaration): Capture and
	restore the Ghost mode.
	(Analyze_Subtype_Declaration): Capture and restore the Ghost mode.
	(Process_Full_View): The full view inherits all Ghost-related
	attributes from the private view.
	(Restore_Globals): New routine.
	* sem_ch5.adb (Analyze_Assignment): Capture and restore the
	Ghost mode.
	(Restore_Globals): New routine.
	* sem_ch6.adb (Analyze_Abstract_Subprogram_Declaration):
	Code cleanup. Capture and restore the Ghost mode. Mark a
	subprogram as Ghost regarless of whether it comes from source.
	(Analyze_Procedure_Call): Capture and restore the Ghost mode.
	(Analyze_Subprogram_Body_Helper): Capture and restore the Ghost mode.
	(Analyze_Subprogram_Declaration): Capture and restore the Ghost mode.
	(New_Overloaded_Entity): Ensure that a
	parent subprogram and an overriding subprogram have compatible
	Ghost policies.
	* sem_ch7.adb (Analyze_Package_Body_Helper): Capture and restore
	the Ghost mode.
	(Analyze_Package_Declaration): Capture and
	restore the Ghost mode. Mark a package as Ghost when it is
	declared in a Ghost region.
	(Analyze_Private_Type_Declaration): Capture and restore the Ghost mode.
	(Restore_Globals): New routine.
	* sem_ch8.adb (Analyze_Exception_Renaming): Code
	reformatting. Capture and restore the Ghost mode. A renaming
	becomes Ghost when its name references a Ghost entity.
	(Analyze_Generic_Renaming): Capture and restore the Ghost mode. A
	renaming becomes Ghost when its name references a Ghost entity.
	(Analyze_Object_Renaming): Capture and restore the Ghost mode. A
	renaming becomes Ghost when its name references a Ghost entity.
	(Analyze_Package_Renaming): Capture and restore the Ghost mode. A
	renaming becomes Ghost when its name references a Ghost entity.
	(Analyze_Subprogram_Renaming): Capture and restore the Ghost
	mode. A renaming becomes Ghost when its name references a
	Ghost entity.
	* sem_ch11.adb (Analyze_Exception_Declaration): Capture, set
	and restore the Ghost mode.
	* sem_ch12.adb (Analyze_Generic_Package_Declaration): Capture and
	restore the Ghost mode.
	(Analyze_Generic_Subprogram_Declaration):
	Capture and restore the Ghost mode.
	* sem_ch13.adb Add with and use clauses for Ghost.
	(Add_Invariant): New routine.
	(Add_Invariants): Factor out code.
	(Add_Predicate): New routine.
	(Add_Predicates): Factor out code.
	(Build_Invariant_Procedure_Declaration): Code cleanup. Capture,
	set and restore the Ghost mode.
	(Build_Invariant_Procedure): Code cleanup.
	(Build_Predicate_Functions): Capture, set and
	restore the Ghost mode. Mark the generated functions as Ghost.
	* sem_prag.adb (Analyze_Contract_Cases_In_Decl_Part):
	Capture, set and restore the Ghost mode.
	(Analyze_External_Property_In_Decl_Part): Capture, set and restore
	the Ghost mode.
	(Analyze_Initial_Condition_In_Decl_Part):
	Capture, set and restore the Ghost mode.
	(Analyze_Pragma):
	Code cleanup. Capture, set and restore the Ghost mode. Flag
	pragmas Linker_Section, No_Return, Unmodified, Unreferenced and
	Unreferenced_Objects as illegal when it applies to both Ghost
	and living arguments. Pragma Ghost cannot apply to synchronized
	objects.
	(Check_Kind): Moved to the spec of Sem_Prag.
	(Process_Inline): Flag the pragma as illegal when it applies to
	both Ghost and living arguments.
	(Restore_Globals): New routine.
	* sem_prag.ads Add pragma Default_Initial_Condition
	to table Assertion_Expression_Pragma. Add new table
	Is_Aspect_Specifying_Pragma.
	(Check_Kind): Moved from body of Sem_Prag.
	* sem_util.adb Add with and use clauses for Ghost.
	(Build_Default_Init_Cond_Procedure_Body): Capture, set and restore
	the Ghost mode.
	(Build_Default_Init_Cond_Procedure_Declaration):
	Capture, set and restore the Ghost mode. Mark the default
	initial condition procedure as Ghost when it is declared
	in a Ghost region.
	(Is_Renaming_Declaration): New routine.
	(Policy_In_List): Account for the single argument version of
	Check_Pragma.
	* sem_util.ads (Is_Renaming_Declaration): New routine.
	* sinfo.adb (Is_Ghost_Pragma): New routine.
	(Set_Is_Ghost_Pragma): New routine.
	* sinfo.ads New attribute Is_Ghost_Pragma.
	(Is_Ghost_Pragma): New routine along with pragma Inline.
	(Set_Is_Ghost_Pragma): New routine along with pragma Inline.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@223684 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 24 insertions, 0 deletions

diff --git a/gcc/ada/sem_ch5.adb b/gcc/ada/sem_ch5.adb
index c2cefd1facc..162e6db03a8 100644
--- a/gcc/ada/sem_ch5.adb
+++ b/gcc/ada/sem_ch5.adb
@@ -90,6 +90,7 @@ package body Sem_Ch5 is
    ------------------------
 
    procedure Analyze_Assignment (N : Node_Id) is
+      GM   : constant Ghost_Mode_Type := Ghost_Mode;
       Lhs  : constant Node_Id := Name (N);
       Rhs  : constant Node_Id := Expression (N);
       T1   : Entity_Id;
@@ -106,6 +107,9 @@ package body Sem_Ch5 is
       --  the assignment, and at the end of processing before setting any new
       --  current values in place.
 
+      procedure Restore_Globals;
+      --  Restore the values of all saved global variables
+
       procedure Set_Assignment_Type
         (Opnd      : Node_Id;
          Opnd_Type : in out Entity_Id);
@@ -211,6 +215,15 @@ package body Sem_Ch5 is
          end if;
       end Kill_Lhs;
 
+      ---------------------
+      -- Restore_Globals --
+      ---------------------
+
+      procedure Restore_Globals is
+      begin
+         Ghost_Mode := GM;
+      end Restore_Globals;
+
       -------------------------
       -- Set_Assignment_Type --
       -------------------------
@@ -378,6 +391,7 @@ package body Sem_Ch5 is
             Error_Msg_N
               ("no valid types for left-hand side for assignment", Lhs);
             Kill_Lhs;
+            Restore_Globals;
             return;
          end if;
       end if;
@@ -453,12 +467,14 @@ package body Sem_Ch5 is
                                   "specified??", Lhs);
                   end if;
 
+                  Restore_Globals;
                   return;
                end if;
             end if;
          end;
 
          Diagnose_Non_Variable_Lhs (Lhs);
+         Restore_Globals;
          return;
 
       --  Error of assigning to limited type. We do however allow this in
@@ -478,6 +494,8 @@ package body Sem_Ch5 is
               ("left hand of assignment must not be limited type", Lhs);
             Explain_Limited_Type (T1, Lhs);
          end if;
+
+         Restore_Globals;
          return;
 
       --  Enforce RM 3.9.3 (8): the target of an assignment operation cannot be
@@ -516,6 +534,7 @@ package body Sem_Ch5 is
       then
          Error_Msg_N ("invalid use of incomplete type", Lhs);
          Kill_Lhs;
+         Restore_Globals;
          return;
       end if;
 
@@ -533,6 +552,7 @@ package body Sem_Ch5 is
 
       if Rhs = Error then
          Kill_Lhs;
+         Restore_Globals;
          return;
       end if;
 
@@ -541,6 +561,7 @@ package body Sem_Ch5 is
       if not Covers (T1, T2) then
          Wrong_Type (Rhs, Etype (Lhs));
          Kill_Lhs;
+         Restore_Globals;
          return;
       end if;
 
@@ -568,6 +589,7 @@ package body Sem_Ch5 is
 
       if T1 = Any_Type or else T2 = Any_Type then
          Kill_Lhs;
+         Restore_Globals;
          return;
       end if;
 
@@ -660,6 +682,7 @@ package body Sem_Ch5 is
             --  to reset Is_True_Constant, and desirable for xref purposes.
 
             Note_Possible_Modification (Lhs, Sure => True);
+            Restore_Globals;
             return;
 
          --  If we know the right hand side is non-null, then we convert to the
@@ -866,6 +889,7 @@ package body Sem_Ch5 is
       end;
 
       Analyze_Dimension (N);
+      Restore_Globals;
    end Analyze_Assignment;
 
    -----------------------------