1 files changed, 18 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-16.c b/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-16.c
new file mode 100644
index 000000000..56d85e58e
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-16.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-O -fdump-tree-fre" } */
+
+/* FRE should be able to combine i and j and perform simplification
+   on the condition.  */
+
+extern void link_error (void);
+int i;
+int foo(int b, int c)
+{
+  i = b + 1;
+  int j = i - 1;
+  if (b != j)
+    link_error ();
+}
+
+/* { dg-final { scan-tree-dump-not "link_error" "fre" } } */
+/* { dg-final { cleanup-tree-dump "fre" } } */