[Ada] Silence spurious warning on instances of formal vectors

2020-06-08  Claire Dross  <dross@adacore.com>

gcc/ada/

	* libgnat/a-cofove.adb (Insert_Space): The computation of Index
	generates a spurious compiler warning about a value not being in
	range for a statically dead branch.  Silence it using pragma
	Warnings.

diff --git a/gcc/ada/libgnat/a-cofove.adb b/gcc/ada/libgnat/a-cofove.adb
index 6835503928acc0e8ce9212647f0bbac18462e9bc..41c69a8cc9aa54e8e2877423cbb7154ab3eb3a01 100644 (file)
--- a/gcc/ada/libgnat/a-cofove.adb
+++ b/gcc/ada/libgnat/a-cofove.adb
@@ -868,7 +868,11 @@ is
             --  less than 0, so it is safe to compute the following sum without
             --  fear of overflow.
 
+            pragma Warnings
+              (Off, "value not in range of type ""T"" defined at line 4");
             Index := No_Index + Index_Type'Base (Count_Type'Last);
+            pragma Warnings
+              (On, "value not in range of type ""T"" defined at line 4");
 
             if Index <= Index_Type'Last then