Add the testcase from llvm PR40322

test/exception-reduced.cpp

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2019 Marc Aldorasi
+ *
+ * This file is part of llvm-mingw.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <new>
+
+typedef void (*func_ptr)(int);
+struct h {
+    func_ptr z;
+};
+struct c {
+    h* e;
+};
+struct as {
+    as() { at = static_cast<int *>(operator new(sizeof(int))); }
+    ~as() { operator delete(at); }
+    int *at;
+};
+void am(int) {
+    static as au;
+    as av;
+    throw 0;
+}
+int main(int argc, char* argv[]) {
+    h hh{am};
+    c *u = new c{&hh};
+    try {
+        u->e->z(0);
+    } catch (...) {
+    }
+    return 0;
+}