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[Ada] Revert meaning of -gnatd_b

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gcc/ada/

	* debug.adb, sem_util.adb: Revert meaning of -gnatd_b.
	* sem_res.adb: Minor reformatting.
This commit is contained in:
Arnaud Charlet 2021-05-24 08:38:20 -04:00 committed by Pierre-Marie de Rodat
parent 3cb32058b4
commit a2f91a52b4
3 changed files with 34 additions and 31 deletions
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6
gcc/ada/debug.adb
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@ -140,7 +140,7 @@ package body Debug is
-- d.Z Do not enable expansion in configurable run-time mode
-- d_a Stop elaboration checks on accept or select statement
-- d_b Use compatibility model under No_Dynamic_Accessibility_Checks
-- d_b Use designated type model under No_Dynamic_Accessibility_Checks
-- d_c CUDA compilation : compile for the host
-- d_d
-- d_e Ignore entry calls and requeue statements for elaboration
@ -956,6 +956,10 @@ package body Debug is
-- behavior is similar to that of No_Entry_Calls_In_Elaboration_Code,
-- but does not penalize actual entry calls in elaboration code.
-- d_b When the restriction No_Dynamic_Accessibility_Checks is enabled,
-- use the simple "designated type" accessibility model, instead of
-- using the implicit level of the anonymous access type declaration.
-- d_e The compiler ignores simple entry calls, asynchronous transfer of
-- control, conditional entry calls, timed entry calls, and requeue
-- statements in both the static and dynamic elaboration models.

3
gcc/ada/sem_res.adb
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@ -13738,8 +13738,7 @@ package body Sem_Res is
Deepest_Type_Access_Level (Target_Type)
and then (Nkind (Associated_Node_For_Itype (Opnd_Type)) /=
N_Function_Specification
or else Ekind (Target_Type) in
Anonymous_Access_Kind)
or else Ekind (Target_Type) in Anonymous_Access_Kind)
-- Check we are not in a return value ???

56
gcc/ada/sem_util.adb
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@ -410,17 +410,18 @@ package body Sem_Util is
and then No_Dynamic_Accessibility_Checks_Enabled (N)
and then Is_Anonymous_Access_Type (Etype (N))
then
-- In the alternative model the level is that of the subprogram
-- In the alternative model the level is that of the
-- designated type.
if Debug_Flag_Underscore_B then
return Make_Level_Literal (Typ_Access_Level (Etype (N)));
-- Otherwise the level is that of the subprogram
else
return Make_Level_Literal
(Subprogram_Access_Level (Current_Subprogram));
end if;
-- Otherwise the level is that of the designated type
return Make_Level_Literal
(Typ_Access_Level (Etype (N)));
end if;
if Nkind (N) = N_Function_Call then
@ -659,24 +660,22 @@ package body Sem_Util is
if Allow_Alt_Model
and then No_Dynamic_Accessibility_Checks_Enabled (E)
then
-- In the alternative model the level depends on the
-- entity's context.
-- In the alternative model the level is that of the
-- designated type entity's context.
if Debug_Flag_Underscore_B then
if Is_Formal (E) then
return Make_Level_Literal
(Subprogram_Access_Level
(Enclosing_Subprogram (E)));
end if;
return Make_Level_Literal (Typ_Access_Level (Etype (E)));
-- Otherwise the level depends on the entity's context
elsif Is_Formal (E) then
return Make_Level_Literal
(Subprogram_Access_Level
(Enclosing_Subprogram (E)));
else
return Make_Level_Literal
(Scope_Depth (Enclosing_Dynamic_Scope (E)));
end if;
-- Otherwise the level is that of the designated type
return Make_Level_Literal
(Typ_Access_Level (Etype (E)));
end if;
-- Return the dynamic level in the normal case
@ -701,10 +700,11 @@ package body Sem_Util is
elsif Is_Type (E) then
-- When restriction No_Dynamic_Accessibility_Checks is active
-- along with -gnatd_b.
if Allow_Alt_Model
and then No_Dynamic_Accessibility_Checks_Enabled (E)
and then not Debug_Flag_Underscore_B
and then Debug_Flag_Underscore_B
then
return Make_Level_Literal (Typ_Access_Level (E));
end if;
@ -799,11 +799,11 @@ package body Sem_Util is
= E_Discriminant)
then
-- When restriction No_Dynamic_Accessibility_Checks is active
-- the level is that of the designated type.
-- and -gnatd_b set, the level is that of the designated type.
if Allow_Alt_Model
and then No_Dynamic_Accessibility_Checks_Enabled (E)
and then not Debug_Flag_Underscore_B
and then Debug_Flag_Underscore_B
then
return Make_Level_Literal
(Typ_Access_Level (Etype (E)));
@ -825,11 +825,11 @@ package body Sem_Util is
= E_Anonymous_Access_Type
then
-- When restriction No_Dynamic_Accessibility_Checks is active
-- the level is that of the designated type.
-- and -gnatd_b set, the level is that of the designated type.
if Allow_Alt_Model
and then No_Dynamic_Accessibility_Checks_Enabled (E)
and then not Debug_Flag_Underscore_B
and then Debug_Flag_Underscore_B
then
return Make_Level_Literal
(Typ_Access_Level (Etype (E)));
@ -7212,7 +7212,7 @@ package body Sem_Util is
if Allow_Alt_Model
and then No_Dynamic_Accessibility_Checks_Enabled (Typ)
and then Debug_Flag_Underscore_B
and then not Debug_Flag_Underscore_B
then
return Type_Access_Level (Typ, Allow_Alt_Model);
end if;
@ -29176,16 +29176,16 @@ package body Sem_Util is
if Allow_Alt_Model
and then No_Dynamic_Accessibility_Checks_Enabled (Btyp)
then
-- In the normal model, the level of an anonymous access
-- In the -gnatd_b model, the level of an anonymous access
-- type is always that of the designated type.
if not Debug_Flag_Underscore_B then
if Debug_Flag_Underscore_B then
return Type_Access_Level
(Designated_Type (Btyp), Allow_Alt_Model);
end if;
-- Otherwise the secondary model dictates special handling
-- depending on the context of the anonymous access type.
-- Otherwise take the context of the anonymous access type into
-- account.
-- Obtain the defining entity for the internally generated
-- anonymous access type.