[PR88420] Fortran OpenACC "Clause SEQ conflicts with INDEPENDENT"

The Fortran front end declares that the OpenACC "Clause SEQ conflicts with
INDEPENDENT".  While that combination doesn't make too much sense indeed, it's
still valid; these are orthogonal concepts.

	gcc/fortran/
	PR fortran/88420
	* openmp.c (resolve_oacc_loop_blocks): Remove "Clause SEQ
	conflicts with INDEPENDENT" diagnostic.
	gcc/testsuite/
	PR fortran/88420
	* gfortran.dg/goacc/loop-1-2.f95: Update.
	* gfortran.dg/goacc/loop-1.f95: Likewise.

From-SVN: r266920

gcc/fortran/ChangeLog

+2018-12-09  Thomas Schwinge  <thomas@codesourcery.com>
+
+	PR fortran/88420
+	* openmp.c (resolve_oacc_loop_blocks): Remove "Clause SEQ
+	conflicts with INDEPENDENT" diagnostic.
+
 2018-12-08  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/88048

gcc/fortran/openmp.c

@@ -5895,8 +5895,6 @@ resolve_oacc_loop_blocks (gfc_code *code)
 
   if (code->ext.omp_clauses->seq)
     {
-      if (code->ext.omp_clauses->independent)
-	gfc_error ("Clause SEQ conflicts with INDEPENDENT at %L", &code->loc);
       if (code->ext.omp_clauses->gang)
 	gfc_error ("Clause SEQ conflicts with GANG at %L", &code->loc);
       if (code->ext.omp_clauses->worker)

gcc/testsuite/ChangeLog

+2018-12-09  Thomas Schwinge  <thomas@codesourcery.com>
+
+	PR fortran/88420
+	* gfortran.dg/goacc/loop-1-2.f95: Update.
+	* gfortran.dg/goacc/loop-1.f95: Likewise.
+
 2018-12-08  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/88048

gcc/testsuite/gfortran.dg/goacc/loop-1-2.f95

@@ -152,8 +152,7 @@ subroutine test1
         ! { dg-error "ACC LOOP iteration variable must be of type integer" "" { target *-*-* } 150 }
     end do
 
-    ! Both seq and independent are not allowed
-  !$acc loop independent seq ! { dg-error "SEQ conflicts with INDEPENDENT" }
+  !$acc loop independent seq
   do i = 1,10
   enddo
 

gcc/testsuite/gfortran.dg/goacc/loop-1.f95

@@ -152,8 +152,7 @@ subroutine test1
         ! { dg-error "ACC LOOP iteration variable must be of type integer" "" { target *-*-* } 150 }
     end do
 
-    ! Both seq and independent are not allowed
-  !$acc loop independent seq ! { dg-error "SEQ conflicts with INDEPENDENT" }
+  !$acc loop independent seq
   do i = 1,10
   enddo