re PR rtl-optimization/91173 (ICE: in int_mode_for_mode, at stor-layout.c:403)

	PR rtl-optimization/91173
	* g++.dg/pr91173.C: New test.

From-SVN: r273531

gcc/testsuite/ChangeLog

+2019-07-16  Jeff Law  <law@redhat.com>
+
+	PR rtl-optimization/91173
+	* g++.dg/pr91173.C: New test.
+
 2019-07-16  Wilco Dijkstra  <wdijkstr@arm.com>
 
 	PR target/89190

gcc/testsuite/g++.dg/pr91173.C

+class a {
+  int b;
+  void *c;
+
+public:
+  bool aa();
+  int &ab() {
+    if (aa()) {
+      void *d(c);
+      return static_cast<int *>(d)[b];
+    }
+    return *(int *)0;
+  }
+};
+typedef enum {E} e;
+class f : public a {
+  int g;
+
+public:
+  int ac() {
+    if (g)
+      return 1;
+    return ac();
+  }
+};
+int *ad;
+struct h {
+  static int ae(e, int *m) {
+    f ag;
+    int *ah;
+    while (!0) {
+      ad = &ag.ab();
+      ah = ad + ag.ac();
+      while (ad < ah)
+        *m = *ad++;
+    }
+  }
+};
+template <class, class>
+void i(int *, int *, int, int *, e n, int *o) {
+  h::ae(n, o);
+}
+int aq, ar, as, at, au;
+void aw() { i<int, bool>(&aq, &ar, as, &at, (e)0, &au); }
+