* doc/options.texi (NegativeAlias): Document.

	(Alias): Mention NegativeAlias.
	* opt-functions.awk: Handle NegativeAlias.
	* optc-gen.awk: Disallow NegativeAlias with multiple Alias
	arguments.
	* opts-common.c (decode_cmdline_option): Handle CL_NEGATIVE_ALIAS.
	* opts.h (CL_NEGATIVE_ALIAS): Define.
	* config/rs6000/rs6000.c (rs6000_parse_yes_no_option): Remove.
	(rs6000_handle_option): Don't handle OPT_mvrsave_, OPT_misel_ and
	OPT_mspe_.
	* config/rs6000/rs6000.opt (mvrsave=, misel=, mspe=): Replace with
	Alias entries.
	* config/rs6000/t-spe (MULTILIB_OPTIONS, MULTILIB_EXCEPTIONS): Use
	mno-spe and mno-isel instead of mspe=no and -misel=no.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@171745 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 9 insertions, 1 deletions

diff --git a/gcc/doc/options.texi b/gcc/doc/options.texi
index e39d79e1c8f..608afa2b1b9 100644
--- a/gcc/doc/options.texi
+++ b/gcc/doc/options.texi
@@ -364,7 +364,8 @@ for later processing.
 @item Alias(@var{opt})
 @itemx Alias(@var{opt}, @var{arg})
 @itemx Alias(@var{opt}, @var{posarg}, @var{negarg})
-The option is an alias for @option{-@var{opt}}.  In the first form,
+The option is an alias for @option{-@var{opt}} (or the negative form
+of that option, depending on @code{NegativeAlias}).  In the first form,
 any argument passed to the alias is considered to be passed to
 @option{-@var{opt}}, and @option{-@var{opt}} is considered to be
 negated if the alias is used in negated form.  In the second form, the
@@ -387,6 +388,13 @@ not need to handle it and no @samp{OPT_} enumeration value is defined
 for it; only the canonical form of the option will be seen in those
 places.
 
+@item NegativeAlias
+For an option marked with @code{Alias(@var{opt})}, the option is
+considered to be an alias for the positive form of @option{-@var{opt}}
+if negated and for the negative form of @option{-@var{opt}} if not
+negated.  @code{NegativeAlias} may not be used with the forms of
+@code{Alias} taking more than one argument.
+
 @item Ignore
 This option is ignored apart from printing any warning specified using
 @code{Warn}.  The option will not be seen by specs and no @samp{OPT_}