1 files changed, 40 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/volatile11.f90 b/gcc/testsuite/gfortran.dg/volatile11.f90
new file mode 100644
index 000000000..5742915ab
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/volatile11.f90
@@ -0,0 +1,40 @@
+! { dg-do compile }
+! { dg-options "-O2 -fdump-tree-optimized" }
+! Tests that volatile can be applied to members of common blocks or
+! equivalence groups (PR fortran/35037)
+!
+subroutine wait1
+  logical event
+  volatile event
+  common /dd/ event
+  event = .false.
+  do
+    if (event) print *, 'NotOptimizedAway1'
+  end do
+end subroutine
+
+subroutine wait2
+  logical event, foo
+  volatile event
+  equivalence (event, foo)
+  event = .false.
+  do
+    if (event) print *, 'NotOptimizedAway2'
+  end do
+end subroutine
+
+subroutine wait3
+  logical event
+  integer foo
+  volatile foo
+  equivalence (event, foo)
+  event = .false.
+  do
+    if (event) print *, 'IsOptimizedAway'
+  end do
+end subroutine
+
+! { dg-final { scan-tree-dump "NotOptimizedAway1" "optimized" } } */
+! { dg-final { scan-tree-dump "NotOptimizedAway2" "optimized" } } */
+! { dg-final { scan-tree-dump-not "IsOptimizedAway" "optimized" } } */
+! { dg-final { cleanup-tree-dump "optimized" } } */