options.texi (NegativeAlias): Document.

	* 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.

From-SVN: r171745

gcc/ChangeLog

+2011-03-30  Joseph Myers  <joseph@codesourcery.com>
+
+	* 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.
+
 2011-03-29  Mark Wielaard  <mjw@redhat.com>
 
 	* common.opt (fdebug-types-section): New flag.

gcc/config/rs6000/rs6000.c

@@ -1082,7 +1082,6 @@ static bool rs6000_handle_option (struct gcc_options *, struct gcc_options *,
 				  const struct cl_decoded_option *,
 				  location_t);
 static int rs6000_loop_align_max_skip (rtx);
-static void rs6000_parse_yes_no_option (const char *, const char *, int *);
 static int first_altivec_reg_to_save (void);
 static unsigned int compute_vrsave_mask (void);
 static void compute_save_world_info (rs6000_stack_t *info_ptr);
@@ -3820,24 +3819,6 @@ rs6000_preferred_simd_mode (enum machine_mode mode)
   return word_mode;
 }
 
-/* Handle generic options of the form -mfoo=yes/no.
-   NAME is the option name.
-   VALUE is the option value.
-   FLAG is the pointer to the flag where to store a 1 or 0, depending on
-   whether the option value is 'yes' or 'no' respectively.  */
-static void
-rs6000_parse_yes_no_option (const char *name, const char *value, int *flag)
-{
-  if (value == 0)
-    return;
-  else if (!strcmp (value, "yes"))
-    *flag = 1;
-  else if (!strcmp (value, "no"))
-    *flag = 0;
-  else
-    error ("unknown -m%s= option specified: '%s'", name, value);
-}
-
 /* Implement TARGET_OPTION_INIT_STRUCT.  */
 
 static void
@@ -4337,31 +4318,11 @@ rs6000_handle_option (struct gcc_options *opts, struct gcc_options *opts_set,
       TARGET_ALTIVEC_VRSAVE = value;
       break;
 
-    case OPT_mvrsave_:
-      rs6000_explicit_options.vrsave = true;
-      rs6000_parse_yes_no_option ("vrsave", arg, &(TARGET_ALTIVEC_VRSAVE));
-      break;
-
-    case OPT_misel_:
-      target_flags_explicit |= MASK_ISEL;
-      isel = 0;
-      rs6000_parse_yes_no_option ("isel", arg, &isel);
-      if (isel)
-	target_flags |= MASK_ISEL;
-      else
-	target_flags &= ~MASK_ISEL;
-      break;
-
     case OPT_mspe:
       rs6000_explicit_options.spe = true;
       rs6000_spe = value;
       break;
 
-    case OPT_mspe_:
-      rs6000_explicit_options.spe = true;
-      rs6000_parse_yes_no_option ("spe", arg, &(rs6000_spe));
-      break;
-
     case OPT_mdebug_:
       p = ASTRDUP (arg);
       rs6000_debug = 0;

gcc/config/rs6000/rs6000.opt

 ; Options for the rs6000 port of the compiler
 ;
-; Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Free Software
+; Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software
 ; Foundation, Inc.
 ; Contributed by Aldy Hernandez <aldy@quesejoda.com>.
 ;
@@ -353,9 +353,13 @@ mvrsave
 Target Report Var(TARGET_ALTIVEC_VRSAVE) Save
 Generate VRSAVE instructions when generating AltiVec code
 
-mvrsave=
-Target RejectNegative Joined
--mvrsave=yes/no	Deprecated option.  Use -mvrsave/-mno-vrsave instead
+mvrsave=no
+Target RejectNegative Alias(mvrsave) NegativeAlias
+Deprecated option.  Use -mno-vrsave instead
+
+mvrsave=yes
+Target RejectNegative Alias(mvrsave)
+Deprecated option.  Use -mvrsave instead
 
 mblock-move-inline-limit=
 Target Report Var(rs6000_block_move_inline_limit) Init(0) RejectNegative Joined UInteger Save
@@ -365,9 +369,13 @@ misel
 Target Report Mask(ISEL) Save
 Generate isel instructions
 
-misel=
-Target RejectNegative Joined
--misel=yes/no	Deprecated option.  Use -misel/-mno-isel instead
+misel=no
+Target RejectNegative Alias(misel) NegativeAlias
+Deprecated option.  Use -mno-isel instead
+
+misel=yes
+Target RejectNegative Alias(misel)
+Deprecated option.  Use -misel instead
 
 mspe
 Target
@@ -377,9 +385,13 @@ mpaired
 Target Var(rs6000_paired_float) Save
 Generate PPC750CL paired-single instructions
 
-mspe=
-Target RejectNegative Joined
--mspe=yes/no	Deprecated option.  Use -mspe/-mno-spe instead
+mspe=no
+Target RejectNegative Alias(mspe) NegativeAlias
+Deprecated option.  Use -mno-spe instead
+
+mspe=yes
+Target RejectNegative Alias(mspe)
+Deprecated option.  Use -mspe instead
 
 mdebug=
 Target RejectNegative Joined

gcc/config/rs6000/t-spe

 # Multilibs for e500
 #
-# Copyright (C) 2003 Free Software Foundation, Inc.
+# Copyright (C) 2003, 2011 Free Software Foundation, Inc.
 #
 # This file is part of GCC.
 #
@@ -36,51 +36,51 @@ INSTALL_LIBGCC = install-multilib
 #	-mcpu=7400 -maltivec -mabi=altivec
 #	-mcpu=7400 -msoft-float
 #	-msoft-float
-#	-mspe=no -mabi=no-spe -misel=no
+#	-mno-spe -mabi=no-spe -mno-isel
 # so we'll need to create exceptions later below.
 
 MULTILIB_OPTIONS	= mcpu=7400 \
 			  maltivec \
 			  mabi=altivec \
 			  msoft-float \
-			  mspe=no \
+			  mno-spe \
 			  mabi=no-spe \
-			  misel=no \
+			  mno-isel \
 			  mlittle
 
 MULTILIB_DIRNAMES	= mpc7400 altivec abi-altivec \
 			  nof no-spe no-abi-spe no-isel le
 
-MULTILIB_EXCEPTIONS	= maltivec mabi=altivec mspe=no mabi=no-spe misel=no \
+MULTILIB_EXCEPTIONS	= maltivec mabi=altivec mno-spe mabi=no-spe mno-isel \
 			  maltivec/mabi=altivec \
 			  mcpu=7400/maltivec \
 			  mcpu=7400/mabi=altivec \
-			  *mcpu=7400/*mspe=no* \
+			  *mcpu=7400/*mno-spe* \
 			  *mcpu=7400/*mabi=no-spe* \
-			  *mcpu=7400/*misel=no* \
+			  *mcpu=7400/*mno-isel* \
 			  *maltivec/*msoft-float* \
-			  *maltivec/*mspe=no* \
+			  *maltivec/*mno-spe* \
 			  *maltivec/*mabi=no-spe* \
-			  *maltivec/*misel=no* \
+			  *maltivec/*mno-isel* \
 			  *mabi=altivec/*msoft-float* \
-			  *mabi=altivec/*mspe=no* \
+			  *mabi=altivec/*mno-spe* \
 			  *mabi=altivec/*mabi=no-spe* \
-			  *mabi=altivec/*misel=no* \
-			  *msoft-float/*mspe=no* \
+			  *mabi=altivec/*mno-isel* \
+			  *msoft-float/*mno-spe* \
 			  *msoft-float/*mabi=no-spe* \
-			  *msoft-float/*misel=no* \
-			  mspe=no/mabi=no-spe \
-			  mspe=no/misel=no \
-			  mabi=no-spe/misel=no \
-			  misel=no/mlittle \
-			  mabi=no-spe/misel=no/mlittle \
-			  mspe=no/mlittle \
+			  *msoft-float/*mno-isel* \
+			  mno-spe/mabi=no-spe \
+			  mno-spe/mno-isel \
+			  mabi=no-spe/mno-isel \
+			  mno-isel/mlittle \
+			  mabi=no-spe/mno-isel/mlittle \
+			  mno-spe/mlittle \
 			  mabi=spe/mlittle \
 			  mcpu=7400/mabi=altivec/mlittle \
 			  mcpu=7400/maltivec/mlittle \
 			  mabi=no-spe/mlittle \
-			  mspe=no/misel=no/mlittle \
-			  mspe=no/mabi=no-spe/mlittle \
+			  mno-spe/mno-isel/mlittle \
+			  mno-spe/mabi=no-spe/mlittle \
 			  mabi=altivec/mlittle \
 			  maltivec/mlittle \
 			  maltivec/mabi=altivec/mlittle

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_}

gcc/opt-functions.awk

-#  Copyright (C) 2003, 2004, 2007, 2008, 2009, 2010
+#  Copyright (C) 2003, 2004, 2007, 2008, 2009, 2010, 2011
 #  Free Software Foundation, Inc.
 #  Contributed by Kelley Cook, June 2004.
 #  Original code from Neil Booth, May 2003.
@@ -90,6 +90,7 @@ function switch_flags (flags)
 	  test_flag("RejectDriver", flags, " | CL_REJECT_DRIVER") \
 	  test_flag("NoDriverArg", flags, " | CL_NO_DRIVER_ARG") \
 	  test_flag("SeparateAlias", flags, " | CL_SEPARATE_ALIAS") \
+	  test_flag("NegativeAlias", flags, " | CL_NEGATIVE_ALIAS") \
 	  test_flag("Save", flags, " | CL_SAVE") \
 	  test_flag("Joined", flags, " | CL_JOINED") \
 	  test_flag("JoinedOrMissing", flags, " | CL_JOINED | CL_MISSING_OK") \

gcc/optc-gen.awk

@@ -362,6 +362,11 @@ for (i = 0; i < n_opts; i++) {
 				print "#error Alias with single argument " \
 					"allowing negative form"
 		}
+		if (alias_posarg != "" \
+		    && flag_set_p("NegativeAlias", flags[i])) {
+			print "#error Alias with multiple arguments " \
+				"used with NegativeAlias"
+		}
 
 		alias_opt = opt_enum(alias_opt)
 		if (alias_posarg == "")

gcc/opts-common.c

@@ -507,6 +507,7 @@ decode_cmdline_option (const char **argv, unsigned int lang_mask,
 	    {
 	      gcc_assert (option->alias_arg != NULL);
 	      gcc_assert (arg == NULL);
+	      gcc_assert (!(option->flags & CL_NEGATIVE_ALIAS));
 	      if (value)
 		arg = option->alias_arg;
 	      else
@@ -517,9 +518,13 @@ decode_cmdline_option (const char **argv, unsigned int lang_mask,
 	    {
 	      gcc_assert (value == 1);
 	      gcc_assert (arg == NULL);
+	      gcc_assert (!(option->flags & CL_NEGATIVE_ALIAS));
 	      arg = option->alias_arg;
 	    }
 
+	  if (option->flags & CL_NEGATIVE_ALIAS)
+	    value = !value;
+
 	  opt_index = new_opt_index;
 	  option = new_option;
 

gcc/opts.h

@@ -115,6 +115,7 @@ extern const unsigned int cl_lang_count;
 #define CL_MISSING_OK		(1U << 28) /* Missing argument OK (joined).  */
 #define CL_UINTEGER		(1U << 29) /* Argument is an integer >=0.  */
 #define CL_UNDOCUMENTED		(1U << 30) /* Do not output with --help.  */
+#define CL_NEGATIVE_ALIAS	(1U << 31) /* Alias to negative form of option.  */
 
 /* Flags for an enumerated option argument.  */
 #define CL_ENUM_CANONICAL	(1 << 0) /* Canonical for this value.  */