match.c (gfc_match_stopcode): Permit error stop in pure procedures with F2015.

gcc/fortran/
2014-12-31  Tobias Burnus  <burnus@net-b.de>

        * match.c (gfc_match_stopcode): Permit error stop in pure
        procedures with F2015.

gcc/testsuite/
2014-12-31  Tobias Burnus  <burnus@net-b.de>

        * gfortran.dg/error_stop_3.f90: New.
        * gfortran.dg/error_stop_4.f90: New.
        * gfortran.dg/coarray_3.f90: Remove a dg-error.

From-SVN: r219127

gcc/fortran/ChangeLog

+2014-12-31  Tobias Burnus  <burnus@net-b.de>
+
+	* match.c (gfc_match_stopcode): Permit error stop in pure
+	procedures with F2015.
+
 2014-12-31  Uros Bizjak  <ubizjak@gmail.com>
 
 	* trans-array.c (trans_array_bound_check): Use xasprintf instead

gcc/fortran/match.c

@@ -2557,7 +2557,8 @@ gfc_match_cycle (void)
 }
 
 
-/* Match a number or character constant after an (ALL) STOP or PAUSE statement.  */
+/* Match a number or character constant after an (ERROR) STOP or PAUSE
+   statement.  */
 
 static match
 gfc_match_stopcode (gfc_statement st)
@@ -2581,9 +2582,18 @@ gfc_match_stopcode (gfc_statement st)
 
   if (gfc_pure (NULL))
     {
-      gfc_error ("%s statement not allowed in PURE procedure at %C",
-		 gfc_ascii_statement (st));
-      goto cleanup;
+      if (st == ST_ERROR_STOP)
+	{
+	  if (!gfc_notify_std (GFC_STD_F2015, "%s statement at %C in PURE "
+			       "procedure", gfc_ascii_statement (st)))
+	    goto cleanup;
+	}
+      else
+	{
+	  gfc_error ("%s statement not allowed in PURE procedure at %C",
+		     gfc_ascii_statement (st));
+	  goto cleanup;
+	}
     }
 
   gfc_unset_implicit_pure (NULL);

gcc/testsuite/ChangeLog

+2014-12-31  Tobias Burnus  <burnus@net-b.de>
+
+	* gfortran.dg/error_stop_3.f90: New.
+	* gfortran.dg/error_stop_4.f90: New.
+	* gfortran.dg/coarray_3.f90: Remove a dg-error.
+
 2014-12-31  Iain Sandoe  <iain@codesourcery.com>
 
 	* obj-c++.dg/lambda-0.mm New.

gcc/testsuite/gfortran.dg/coarray_3.f90

@@ -79,7 +79,7 @@ pure subroutine pureSub()
   critical ! { dg-error "Image control statement CRITICAL" }
   end critical ! { dg-error "Expecting END SUBROUTINE statement" }
   sync all ! { dg-error "Image control statement SYNC" }
-  error stop ! { dg-error "not allowed in PURE procedure" }
+  error stop
 end subroutine pureSub
 
 

gcc/testsuite/gfortran.dg/error_stop_3.f90

+! { dg-do compile }
+! { dg-options "-std=gnu" }
+!
+! F2015 permits ERROR STOP in PURE procedures
+! FIXME: Change to -std=f2015, when available
+!
+pure subroutine foo()
+  error stop "failed"
+end

gcc/testsuite/gfortran.dg/error_stop_4.f90

+! { dg-do compile }
+! { dg-options "-std=f2008ts" }
+!
+! F2015 permits ERROR STOP in PURE procedures
+! FIXME: Change to error_stop_3.f90 to -std=f2015.
+!
+pure subroutine foo()
+  error stop "failed"  ! { dg-error "GNU Extension: ERROR STOP statement at .1. in PURE procedure" }
+end