1 files changed, 16 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/reassoc_2.f90 b/gcc/testsuite/gfortran.dg/reassoc_2.f90
new file mode 100644
index 000000000..053cb865f
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/reassoc_2.f90
@@ -0,0 +1,16 @@
+! { dg-do compile }
+! { dg-options "-O3 -ffast-math -fdump-tree-optimized" }
+
+! Make sure that FRE does not replace c with b in d = c - 5
+
+function test(a)
+  real a, b, c, d
+  b = a + 5.
+  c = (a + 5.)
+  d = c - 5.
+  call foo(b)
+  test = d
+end
+
+! { dg-final { scan-tree-dump "- 5" "optimized" } }
+! { dg-final { cleanup-tree-dump "optimized" } }