diff --git a/gcc/ada/sem_ch3.adb b/gcc/ada/sem_ch3.adb
index e92b46fa6f6f54c2053d7859f52e7b2f4d21f498..c1113e4fc42100cde4d7b815d9332c54094f65ab 100644
--- a/gcc/ada/sem_ch3.adb
+++ b/gcc/ada/sem_ch3.adb
@@ -3385,7 +3385,7 @@ package body Sem_Ch3 is
       --  case we bypass this.
 
       if Ekind (T) /= E_Void then
-         if not Present (Direct_Primitive_Operations (T)) then
+         if No (Direct_Primitive_Operations (T)) then
             if Etype (T) = T then
                Set_Direct_Primitive_Operations (T, New_Elmt_List);
 
@@ -3397,8 +3397,7 @@ package body Sem_Ch3 is
 
             elsif Etype (T) = Base_Type (T) then
 
-               if not Present (Direct_Primitive_Operations (Base_Type (T)))
-               then
+               if No (Direct_Primitive_Operations (Base_Type (T))) then
                   Set_Direct_Primitive_Operations
                     (Base_Type (T), New_Elmt_List);
                end if;
@@ -3416,7 +3415,7 @@ package body Sem_Ch3 is
          --  If T already has a Direct_Primitive_Operations list but its
          --  base type doesn't then set the base type's list to T's list.
 
-         elsif not Present (Direct_Primitive_Operations (Base_Type (T))) then
+         elsif No (Direct_Primitive_Operations (Base_Type (T))) then
             Set_Direct_Primitive_Operations
               (Base_Type (T), Direct_Primitive_Operations (T));
          end if;
@@ -10345,7 +10344,7 @@ package body Sem_Ch3 is
       --  If not already set, initialize the derived type's list of primitive
       --  operations to an empty element list.
 
-      if not Present (Direct_Primitive_Operations (Derived_Type)) then
+      if No (Direct_Primitive_Operations (Derived_Type)) then
          Set_Direct_Primitive_Operations (Derived_Type, New_Elmt_List);
 
          --  If Etype of the derived type is the base type (as opposed to
@@ -10355,8 +10354,7 @@ package body Sem_Ch3 is
          --  between the two.
 
          if Etype (Derived_Type) = Base_Type (Derived_Type)
-           and then
-             not Present (Direct_Primitive_Operations (Etype (Derived_Type)))
+           and then No (Direct_Primitive_Operations (Etype (Derived_Type)))
          then
             Set_Direct_Primitive_Operations
               (Etype (Derived_Type),
diff --git a/gcc/ada/sem_ch4.adb b/gcc/ada/sem_ch4.adb
index 2f3dfe71590d4b30c9f77b15e2a0d85cb5f4013f..e3badc3e19d106804273cdbdf85c05659e94c946 100644
--- a/gcc/ada/sem_ch4.adb
+++ b/gcc/ada/sem_ch4.adb
@@ -9911,7 +9911,7 @@ package body Sem_Ch4 is
          if (not Is_Tagged_Type (Obj_Type)
               and then
                 (not (Core_Extensions_Allowed or Allow_Extensions)
-                  or else not Present (Primitive_Operations (Obj_Type))))
+                  or else No (Primitive_Operations (Obj_Type))))
            or else Is_Incomplete_Type (Obj_Type)
          then
             Obj_Type := Prev_Obj_Type;
diff --git a/gcc/ada/sem_eval.adb b/gcc/ada/sem_eval.adb
index f744ab38be64f5ddf07924e39d82b90687018abe..f88a00aa380364c0d1c9e07f1d2f33f26635c6ef 100644
--- a/gcc/ada/sem_eval.adb
+++ b/gcc/ada/sem_eval.adb
@@ -6812,7 +6812,7 @@ package body Sem_Eval is
 
                  --  No constraint on the parent type
 
-                 or else not Present (Discriminant_Constraint (Etype (Typ)))
+                 or else No (Discriminant_Constraint (Etype (Typ)))
                  or else Is_Empty_Elmt_List
                            (Discriminant_Constraint (Etype (Typ)))