* md.texi: Document use of '*' in insn pattern name.

From-SVN: r32309

gcc/ChangeLog

+Fri Mar  3 07:38:34 2000  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
+
+	* md.texi: Document use of '*' in insn pattern name.
+
 2000-03-03  Jason Merrill  <jason@casey.cygnus.com>
 
 	* calls.c (special_function_p): operator new may not be malloc-like.

gcc/md.texi

@@ -68,6 +68,11 @@ to be combined later on.
 Names that are not thus known and used in RTL-generation have no
 effect; they are equivalent to no name at all.
 
+For the purpose of debugging the compiler, you may also specify a
+name beginning with the @samp{*} character.  Such a name is used only
+for identifying the instruction in RTL dumps; it is entirely equivalent
+to having a nameless pattern for all other purposes.
+
 @item
 The @dfn{RTL template} (@pxref{RTL Template}) is a vector of incomplete
 RTL expressions which show what the instruction should look like.  It is