diff --git a/test/smoke-fort-dev/llvm-180493/Makefile b/test/smoke-fort-dev/llvm-180493/Makefile
new file mode 100644
index 000000000..b5699ea60
--- /dev/null
+++ b/test/smoke-fort-dev/llvm-180493/Makefile
@@ -0,0 +1,19 @@
+#NOOPT        = 1
+#NOOMP        = 1
+#OMP_FLAGS    = -DNO_OMP
+include ../../Makefile.defs
+
+TESTNAME     = equiv
+TESTSRC_MAIN = equiv.f90
+TESTSRC_ALL  = $(TESTSRC_MAIN)
+
+FLANG        = flang
+CFLAGS       = -fopenmp
+OMP_BIN      = $(AOMP)/bin/$(FLANG)
+CC           = $(OMP_BIN) $(VERBOSE)
+#-ccc-print-phases
+#"-\#\#\#"
+
+RUNCMD       = ./equiv
+
+include ../Makefile.rules
diff --git a/test/smoke-fort-dev/llvm-180493/equiv.f90 b/test/smoke-fort-dev/llvm-180493/equiv.f90
new file mode 100644
index 000000000..de83dd891
--- /dev/null
+++ b/test/smoke-fort-dev/llvm-180493/equiv.f90
@@ -0,0 +1,54 @@
+program equiv
+    use omp_lib
+    implicit none
+    common/ba/ a,b,c
+    integer :: a,b,c
+    integer :: x,y,z
+
+    integer, parameter :: nthreads = 4
+    integer :: i
+    integer :: chk
+
+    logical :: failed
+
+    !$omp threadprivate(/ba/)
+
+    equivalence (x,a)
+    equivalence (y,a)
+
+    failed = .false.
+
+    !$omp parallel num_threads(nthreads) shared(failed) private(chk)
+        x = 21
+        chk = 21
+        !$omp masked filter(1)
+            x = 42
+            chk = 42
+        !$omp end masked
+
+        !$omp masked filter(2)
+            y = 10
+            chk = 10
+        !$omp end masked
+
+        !$omp barrier
+
+        a = a + omp_get_thread_num()
+        chk = chk + omp_get_thread_num()
+
+        !$omp barrier
+        do i = 0, nthreads-1
+            if (omp_get_thread_num() == i) then
+                print '(I3,I5)', omp_get_thread_num(), a
+                if (chk /= a) then
+                    failed = .true.
+                end if
+            end if
+            !$omp barrier
+        end do
+    !$omp end parallel
+
+    if (failed) then
+        stop 1
+    end if
+end program equiv