Document IntegerRange in internal documentation.

2018-06-12  Martin Liska  <mliska@suse.cz>

	* doc/options.texi: Document IntegerRange.

From-SVN: r261498

gcc/ChangeLog

 2018-06-12  Martin Liska  <mliska@suse.cz>
 
+	* doc/options.texi: Document IntegerRange.
+
+2018-06-12  Martin Liska  <mliska@suse.cz>
+
 	* config/i386/i386.opt: Make MPX-related options as Deprecated.
 	* opt-functions.awk: Handle Deprecated flag.
 	* opts-common.c (decode_cmdline_option): Handle cl_deprecated

gcc/doc/options.texi

@@ -264,6 +264,11 @@ option handler.  @code{UInteger} should also be used on options like
 @code{-falign-loops}=@var{n} are supported to make sure the saved
 options are given a full integer.
 
+@item IntegerRange(@var{n}, @var{m})
+The options's arguments are integer numbers.  The option's parser
+will check that value of an option is inclusively within the
+range [@var{n}, @var{m}].
+
 @item ToLower
 The option's argument should be converted to lowercase as part of
 putting it in canonical form, and before comparing with the strings