[PATCH] Add testcase for PR51801

[Richard Guenther]

Committed.

Richard.

2012-01-10  Richard Guenther  <rguent...@suse.de>

        PR tree-optimization/51801
        * gcc.dg/torture/pr51801.c: New testcase.

Index: gcc/testsuite/gcc.dg/torture/pr51801.c
===================================================================
--- gcc/testsuite/gcc.dg/torture/pr51801.c      (revision 0)
+++ gcc/testsuite/gcc.dg/torture/pr51801.c      (revision 0)
@@ -0,0 +1,62 @@
+/* { dg-do compile } */
+
+typedef struct { char Vshow; } TScreen;
+typedef struct _Misc { char Tshow; } Misc;
+typedef struct _XtermWidgetRec { TScreen screen; Misc misc; } XtermWidgetRec, 
*XtermWidget;
+extern XtermWidget term;
+
+void
+handle_tekshow (void *gw, int allowswitch)
+{
+  XtermWidget xw = term;
+  if (!((xw)->misc.Tshow))
+    set_tek_visibility (1);
+}
+
+void
+do_tekonoff (void *gw, void *closure, void *data)
+{
+  handle_tekshow (gw, 0);
+}
+
+void
+do_vtonoff (void *gw, void *closure, void *data)
+{
+}
+
+void
+handle_toggle (void (*proc) (void *gw, void *closure, void *data),
+              int var, char **params, unsigned int nparams, void *w,
+              void *closure, void *data)
+{
+  XtermWidget xw = term;
+  int dir = -2;
+  switch (nparams)
+    {
+    case 0:
+      dir = -1;
+    }
+  switch (dir)
+    {
+    case 1:
+      (*proc) (w, closure, data);
+      Bell (xw, 2, 0);
+    }
+}
+
+void
+HandleVisibility (void *w, char **params, unsigned int *param_count)
+{
+  XtermWidget xw = term;
+  if (*param_count == 2)
+    switch (params[0][0])
+      {
+      case 'v':
+       handle_toggle (do_vtonoff, (int) ((int) (&(xw)->screen)->Vshow),
+                      params + 1, (*param_count) - 1, w, (void *) 0,
+                      (void *) 0);
+       handle_toggle (do_tekonoff, (int) ((int) ((xw)->misc.Tshow)),
+                      params + 1, (*param_count) - 1, w, (void *) 0,
+                      (void *) 0);
+      }
+}