[Ada] Rename GNATprove annotate pragma for termination to Always_Return

[Pierre-Marie de Rodat via Gcc-patches]

GNATprove changed the name of the pragma Annotate used to verify that
a subprogram always returns normally. It is now called Always_Return
instead of Terminating.

Tested on x86_64-pc-linux-gnu, committed on trunk

gcc/ada/

        * libgnat/s-aridou.adb: Use Always_Return instead of Terminating
        to annotate termination for GNATprove.
        * libgnat/s-arit32.adb: Idem.
        * libgnat/s-spcuop.ads: Idem.
diff --git a/gcc/ada/libgnat/s-aridou.adb b/gcc/ada/libgnat/s-aridou.adb
--- a/gcc/ada/libgnat/s-aridou.adb
+++ b/gcc/ada/libgnat/s-aridou.adb
@@ -162,7 +162,7 @@ is
 
    function To_Neg_Int (A : Double_Uns) return Double_Int
    with
-     Annotate => (GNATprove, Terminating),
+     Annotate => (GNATprove, Always_Return),
      Pre      => In_Double_Int_Range (-Big (A)),
      Post     => Big (To_Neg_Int'Result) = -Big (A);
    --  Convert to negative integer equivalent. If the input is in the range
@@ -172,7 +172,7 @@ is
 
    function To_Pos_Int (A : Double_Uns) return Double_Int
    with
-     Annotate => (GNATprove, Terminating),
+     Annotate => (GNATprove, Always_Return),
      Pre      => In_Double_Int_Range (Big (A)),
      Post     => Big (To_Pos_Int'Result) = Big (A);
    --  Convert to positive integer equivalent. If the input is in the range


diff --git a/gcc/ada/libgnat/s-arit32.adb b/gcc/ada/libgnat/s-arit32.adb
--- a/gcc/ada/libgnat/s-arit32.adb
+++ b/gcc/ada/libgnat/s-arit32.adb
@@ -104,7 +104,7 @@ is
 
    function To_Neg_Int (A : Uns32) return Int32
    with
-     Annotate => (GNATprove, Terminating),
+     Annotate => (GNATprove, Always_Return),
      Pre      => In_Int32_Range (-Big (A)),
      Post     => Big (To_Neg_Int'Result) = -Big (A);
    --  Convert to negative integer equivalent. If the input is in the range
@@ -114,7 +114,7 @@ is
 
    function To_Pos_Int (A : Uns32) return Int32
    with
-     Annotate => (GNATprove, Terminating),
+     Annotate => (GNATprove, Always_Return),
      Pre      => In_Int32_Range (Big (A)),
      Post     => Big (To_Pos_Int'Result) = Big (A);
    --  Convert to positive integer equivalent. If the input is in the range


diff --git a/gcc/ada/libgnat/s-spcuop.ads b/gcc/ada/libgnat/s-spcuop.ads
--- a/gcc/ada/libgnat/s-spcuop.ads
+++ b/gcc/ada/libgnat/s-spcuop.ads
@@ -45,7 +45,7 @@
 package System.SPARK.Cut_Operations with
   SPARK_Mode,
   Pure,
-  Annotate => (GNATprove, Terminating)
+  Annotate => (GNATprove, Always_Return)
 is
 
    function By (Consequence, Premise : Boolean) return Boolean with