[Ada] Fix inlining of subprograms with deep param/result in GNATprove

2019-10-10  Yannick Moy  <moy@adacore.com>

gcc/ada/

	* inline.adb (Can_Be_Inlined_In_GNATprove_Mode): Do not peek
	under private types whose completion is SPARK_Mode Off.

From-SVN: r276833

gcc/ada/ChangeLog

-2019-10-10  Gary Dismukes  <dismukes@adacore.com>
+2019-10-10  Yannick Moy  <moy@adacore.com>
 
-	* exp_ch4.adb, sem_cat.adb, sem_ch12.adb, sem_ch3.adb,
-	sem_ch6.adb, sem_prag.adb, sem_util.adb, sem_util.ads: Minor
-	typo fixes.
\ No newline at end of file
+	* inline.adb (Can_Be_Inlined_In_GNATprove_Mode): Do not peek
+	under private types whose completion is SPARK_Mode Off.
\ No newline at end of file

gcc/ada/inline.adb

@@ -1582,6 +1582,20 @@ package body Inline is
 
                   if No (Underlying_Type (Typ)) then
                      return True;
+
+                  --  Do not peek under a private type if its completion has
+                  --  SPARK_Mode Off. In such a case, a deep type is considered
+                  --  by GNATprove to be not deep.
+
+                  elsif Present (Full_View (Typ))
+                    and then Present (SPARK_Pragma (Full_View (Typ)))
+                    and then Get_SPARK_Mode_From_Annotation
+                      (SPARK_Pragma (Full_View (Typ))) = Off
+                  then
+                     return False;
+
+                  --  Otherwise peek under the private type.
+
                   else
                      return Is_Deep (Underlying_Type (Typ));
                   end if;