--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/ipa/pr93621.C	Mon May 25 07:50:57 2020 +0900
@@ -0,0 +1,29 @@
+// PR ipa/93621
+// { dg-do compile }
+// { dg-options "-O3 --param ipa-cp-eval-threshold=100 --param large-function-growth=60 --param large-function-insns=10 --param uninlined-thunk-insns=1000" }
+
+typedef enum { X } E;
+struct A {
+  virtual void bar ();
+};
+struct B {
+  virtual E fn (const char *, int, int *) = 0;
+};
+struct C : A, B {
+  E fn (const char *, int, int *);
+  void fn2 ();
+  B *foo;
+};
+void C::fn2 () {
+  if (!foo)
+    return;
+  foo->fn (0, 0, 0);
+}
+E
+C::fn (const char *, int, int *)
+{
+  fn2 ();
+  foo = 0;
+  fn (0, 0, 0);
+  return X;
+}