--- gcc/rtlanal.c.jj	2015-06-15 04:55:41.027812458 +0200
+++ gcc/rtlanal.c	2015-06-15 05:11:58.921821778 +0200
@@ -42,6 +42,7 @@ along with GCC; see the file COPYING3.
 #include "emit-rtl.h"  /* FIXME: Can go away once crtl is moved to rtl.h.  */
 #include "addresses.h"
 #include "rtl-iter.h"
+#include "tree-pass.h"
 
 /* Forward declarations */
 static void set_of_1 (rtx, const_rtx, void *);
@@ -663,6 +664,15 @@ rtx_addr_can_trap_p_1 (const_rtx x, HOST
 
 	  if (offset >= low_bound && offset <= high_bound - size)
 	    return 0;
+	  fprintf (stderr, "*** %s can trap: function=%s, pass=%s"
+			   ", offset=%" PRId64 ", size=%" PRId64
+			   ", low_bound=%" PRId64 ", high_bound=%" PRId64 "\n",
+		   x == frame_pointer_rtx ? "frame"
+		   : x == hard_frame_pointer_rtx ? "fp"
+		   : x == stack_pointer_rtx ? "sp" : "argp",
+		   IDENTIFIER_POINTER (DECL_NAME (current_function_decl)),
+		   current_pass->name,
+		   offset, size, low_bound, high_bound);
 	  return 1;
 	}
       /* All of the virtual frame registers are stack references.  */