https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82324
--- Comment #1 from kargl at gcc dot gnu.org ---
Does this fix the problem?
Index: promotion_3.f90
===================================================================
--- promotion_3.f90 (revision 253178)
+++ promotion_3.f90 (working copy)
@@ -1,5 +1,6 @@
! { dg-do run }
! { dg-options "-fdefault-real-16" }
+! { dg-require-effective-target fortran_large_real }
!
! PR 82143: add a -fdefault-real-16 flag
!
Index: promotion_4.f90
===================================================================
--- promotion_4.f90 (revision 253178)
+++ promotion_4.f90 (working copy)
@@ -1,5 +1,6 @@
! { dg-do run }
! { dg-options "-fdefault-real-10" }
+! { dg-require-effective-target fortran_large_real }
!
! PR 82143: add a -fdefault-real-16 flag
!
