I've found this stale reference while looking at cp-gimplify.c. tree-gimple.c
no longer exists and its contents were merged into gimple.c.
Seems obvious enough.
gcc/cp/ChangeLog:
2019-10-16 Luis Machado <luis.machado@linaro.org>
* cp-gimplify.c: Fix reference to non-existing tree-gimple.c file.
From-SVN: r277089
+2019-10-16 Luis Machado <luis.machado@linaro.org>
+
+ * cp-gimplify.c: Fix reference to non-existing tree-gimple.c file.
+
2019-10-16 Jakub Jelinek <jakub@redhat.com>
* decl.c (cxx_maybe_build_cleanup): When clearing location of cleanup,
-/* C++-specific tree lowering bits; see also c-gimplify.c and tree-gimple.c.
+/* C++-specific tree lowering bits; see also c-gimplify.c and gimple.c.
Copyright (C) 2002-2019 Free Software Foundation, Inc.
Contributed by Jason Merrill <jason@redhat.com>