diff --git a/gcc/c-family/c-gimplify.cc b/gcc/c-family/c-gimplify.cc
index 039a4b93230..0034d41d33a 100644
--- a/gcc/c-family/c-gimplify.cc
+++ b/gcc/c-family/c-gimplify.cc
@@ -572,8 +572,8 @@ c_genericize (tree fndecl)
       bc_state_t save_state;
       push_cfun (DECL_STRUCT_FUNCTION (fndecl));
       save_bc_state (&save_state);
-      walk_tree (&DECL_SAVED_TREE (fndecl), c_genericize_control_r,
-		 NULL, NULL);
+      walk_tree_without_duplicates (&DECL_SAVED_TREE (fndecl),
+				    c_genericize_control_r, NULL);
       restore_bc_state (&save_state);
       pop_cfun ();
     }
diff --git a/gcc/testsuite/gcc.dg/pr107127.c b/gcc/testsuite/gcc.dg/pr107127.c
new file mode 100644
index 00000000000..f7ae87db70e
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr107127.c
@@ -0,0 +1,12 @@
+/* PR c/107127 */
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+int *v;
+
+_Complex double
+foo (_Complex double a, double b, double c)
+{
+  return v[0] / ((((c * (0 - 0 / a + 699.0 + 7.05 - 286.0 - +-4.65 + 1.57 + 0) * 0.1 - 3.28 + 4.22 + 0.1)) * b + 5.06)
+		 * 1.23 * 8.0 * 12.0 * 16.0 * 2.0 * 2.0 * 0.25 * 0.125 * 18.2 * -15.25 * 0.0001
+		 * 42.0 * 0.012 - 8.45 + 0 + 88.0 + 6.96 + 867.0 + 9.10 - 7.04 * -1.0);