re PR target/85756 (wrong code at -Os on x86-64-linux-gnu in 32-bit mode)

	PR target/85756
	* gnat.dg/opt70.adb: New test.
	* gnat.dg/opt70_pkg.ad[sb]: New helper.

From-SVN: r260239

gcc/testsuite/ChangeLog

+2018-05-14  Eric Botcazou  <ebotcazou@adacore.com>
+
+	PR target/85756
+	* gnat.dg/opt70.adb: New test.
+	* gnat.dg/opt70_pkg.ad[sb]: New helper.
+
 2018-05-14  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
 	* gcc.target/aarch64/crypto-fuse-1.c: New test.

gcc/testsuite/gnat.dg/opt70.adb

+-- { dg-do run }
+-- { dg-options "-O2" }
+
+with Ada.Calendar;
+with Opt70_Pkg;
+
+procedure Opt70 is
+  T : Ada.Calendar.Time := Ada.Calendar.Time_Of (2001, 10, 31);
+begin
+  if Opt70_Pkg.Image (T, "%y") /= "01" then
+    raise Program_Error;
+  end if;
+end;

gcc/testsuite/gnat.dg/opt70_pkg.adb

+with Ada.Calendar;          use Ada.Calendar;
+with Ada.Strings.Unbounded; use Ada.Strings.Unbounded;
+with GNAT.Calendar;         use GNAT.Calendar;
+
+package body Opt70_Pkg is
+
+   type Enum is (None, Zero, Space);
+
+   type Sec_Number is mod 2 ** 64;
+
+   function Image (N : Sec_Number; Pad : Enum; Length : Natural) return String;
+
+   function Image (N : Natural; Pad : Enum; Length: Natural) return String is
+   begin
+      return Image (Sec_Number (N), Pad, Length);
+   end;
+
+   function Image (N : Sec_Number; Pad : Enum; Length : Natural) return String is
+
+      function Pad_Char return String is
+      begin
+         case Pad is
+            when None  => return "";
+            when Zero  => return "00";
+            when Space => return "  ";
+         end case;
+      end;
+
+      NI  : constant String := Sec_Number'Image (N);
+      NIP : constant String := Pad_Char & NI (2 .. NI'Last);
+
+   begin
+      return NIP (NIP'Last - Length + 1 .. NIP'Last);
+   end;
+
+   function Image (Date : Ada.Calendar.Time; S : String) return String is
+      Result     : Unbounded_String := Null_Unbounded_String;
+      Year       : Year_Number;
+      Month      : Month_Number;
+      Day        : Day_Number;
+      Hour       : Hour_Number;
+      Minute     : Minute_Number;
+      Second     : Second_Number;
+      Sub_Second : Second_Duration;
+   begin
+      Split (Date, Year, Month, Day, Hour, Minute, Second, Sub_Second);
+      case S (S'First + 1) is
+         when 'S' => Result := Result & Image (Second, Zero, 2);
+         when 'y' => Result := Result & Image (Sec_Number (1), Zero, 2);
+         when others => null;
+      end case;
+      return To_String (Result);
+   end;
+
+end Opt70_Pkg;

gcc/testsuite/gnat.dg/opt70_pkg.ads

+with Ada.Calendar;
+
+package Opt70_Pkg is
+
+   function Image (Date : Ada.Calendar.Time; S : String) return String;
+
+end Opt70_Pkg;