Remove MaskNeeded

2012-03-27  H.J. Lu  <hongjiu.lu@intel.com>

	* opth-gen.awk: Allocated a bit for Mask and InverseMask if it
	hasn't been allocated.  Define a target macro for Mask and
	InverseMask if it hasn't been defined.  Remove MaskExists
	handling.

	* doc/options.texi: Remove MaskNeeded.

From-SVN: r185882

gcc/ChangeLog

+2012-03-27  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* opth-gen.awk: Allocated a bit for Mask and InverseMask if it
+	hasn't been allocated.  Define a target macro for Mask and
+	InverseMask if it hasn't been defined.  Remove MaskExists
+	handling.
+
+	* doc/options.texi: Remove MaskNeeded.
+
 2012-03-27  Chung-Lin Tang  <cltang@codesourcery.com>
 
 	PR target/52667

gcc/doc/options.texi

@@ -346,8 +346,6 @@ the value 1 when the option is active and 0 otherwise.  If you use @code{Var}
 to attach the option to a different variable, the associated macros are
 called @code{OPTION_MASK_@var{name}} and @code{OPTION_@var{name}} respectively.
 
-You can disable automatic bit allocation using @code{MaskExists}.
-
 @item InverseMask(@var{othername})
 @itemx InverseMask(@var{othername}, @var{thisname})
 The option is the inverse of another option that has the
@@ -355,15 +353,6 @@ The option is the inverse of another option that has the
 the options-processing script will declare a @code{TARGET_@var{thisname}}
 macro that is 1 when the option is active and 0 otherwise.
 
-@item MaskExists
-The mask specified by the @code{Mask} property already exists.
-No @code{MASK} or @code{TARGET} definitions should be added to
-@file{options.h} in response to this option record.
-
-The main purpose of this property is to support synonymous options.
-The first option should use @samp{Mask(@var{name})} and the others
-should use @samp{Mask(@var{name}) MaskExists}.
-
 @item Enum(@var{name})
 The option's argument is a string from the set of strings associated
 with the corresponding @samp{Enum} record.  The string is checked and

gcc/opth-gen.awk

@@ -298,16 +298,25 @@ print "";
 
 for (i = 0; i < n_opts; i++) {
 	name = opt_args("Mask", flags[i])
-	vname = var_name(flags[i])
-	mask = "MASK_"
-	mask_1 = "1"
-	if (vname != "") {
-		mask = "OPTION_MASK_"
-		if (host_wide_int[vname] == "yes")
-			mask_1 = "HOST_WIDE_INT_1"
+	if (name == "") {
+		opt = opt_args("InverseMask", flags[i])
+		if (opt ~ ",")
+			name = nth_arg(0, opt)
+		else
+			name = opt
 	}
-	if (name != "" && !flag_set_p("MaskExists", flags[i]))
+	if (name != "" && mask_bits[name] == 0) {
+		mask_bits[name] = 1
+		vname = var_name(flags[i])
+		mask = "MASK_"
+		mask_1 = "1"
+		if (vname != "") {
+			mask = "OPTION_MASK_"
+			if (host_wide_int[vname] == "yes")
+				mask_1 = "HOST_WIDE_INT_1"
+		}
 		print "#define " mask name " (" mask_1 " << " masknum[vname]++ ")"
+	}
 }
 for (i = 0; i < n_extra_masks; i++) {
 	print "#define MASK_" extra_masks[i] " (1 << " masknum[""]++ ")"
@@ -330,17 +339,26 @@ print ""
 
 for (i = 0; i < n_opts; i++) {
 	name = opt_args("Mask", flags[i])
-	vname = var_name(flags[i])
-	macro = "OPTION_"
-	mask = "OPTION_MASK_"
-	if (vname == "") {
-		vname = "target_flags"
-		macro = "TARGET_"
-		mask = "MASK_"
+	if (name == "") {
+		opt = opt_args("InverseMask", flags[i])
+		if (opt ~ ",")
+			name = nth_arg(0, opt)
+		else
+			name = opt
 	}
-	if (name != "" && !flag_set_p("MaskExists", flags[i]))
+	if (name != "" && mask_macros[name] == 0) {
+		mask_macros[name] = 1
+		vname = var_name(flags[i])
+		macro = "OPTION_"
+		mask = "OPTION_MASK_"
+		if (vname == "") {
+			vname = "target_flags"
+			macro = "TARGET_"
+			mask = "MASK_"
+		}
 		print "#define " macro name \
 		      " ((" vname " & " mask name ") != 0)"
+	}
 }
 for (i = 0; i < n_extra_masks; i++) {
 	print "#define TARGET_" extra_masks[i] \