[ubsan] Add libcall arguments

[Marek Polacek]

On Mon, Jul 22, 2013 at 10:09:00AM -0400, Jason Merrill wrote:
> On 07/19/2013 02:45 PM, Marek Polacek wrote:
> > /* This type represents an entry in the hash table.  */
> > struct ubsan_typedesc
> > {
> >+  /* This represents the type of a variable.  */
> >   tree type;
> >+
> >+  /* This is the VAR_DECL of the type.  */
> >   tree decl;
> > };
> 
> What I was looking for was something along the lines of "this hash
> table maps from a TYPE to a ubsan type descriptor VAR_DECL for that
> type".

Ah.  Hopefully it's ok this time around; I already commited previous
patch, thus this patchlet.

2013-07-22  Marek Polacek  <polacek@redhat.com>

	* ubsan.c (struct ubsan_typedesc): Improve comment.

--- gcc/ubsan.c.mp	2013-07-22 16:14:16.266199381 +0200
+++ gcc/ubsan.c	2013-07-22 16:19:48.335517383 +0200
@@ -31,7 +31,8 @@ along with GCC; see the file COPYING3.
 #include "ubsan.h"
 #include "c-family/c-common.h"
 
-/* This type represents an entry in the hash table.  */
+/* This type represents an entry in the hash table; this hash table
+   maps from a TYPE to a ubsan type descriptor VAR_DECL for that type.  */
 struct ubsan_typedesc
 {
   /* This represents the type of a variable.  */

	Marek