options.texi (Variable): Document.

	* doc/options.texi (Variable): Document.
	* optc-gen.awk, opth-gen.awk: Handle Variable records.  Don't
	generate target_flags declarations explicitly.  Don't define
	VarExists variables for the driver.
	* common.opt (target_flags): New Variable record.
	(flag_dump_unnumbered, flag_dump_unnumbered_links,
	flag_var_tracking, flag_var_tracking_assignments,
	flag_var_tracking_assignments_toggle): Don't mark variables with
	VarExists.
	* config/i386/i386.c (ix86_isa_flags): Don't define here.
	* config/i386/i386.opt (ix86_isa_flags): Define here.
	* config/mcore/mcore.c (mcore_stack_increment): Don't define here.
	* config/mcore/mcore.opt (mcore_stack_increment): Don't mark with
	VarExists.
	* flags.h (flag_dump_unnumbered, flag_var_tracking): Remove.
	* print-rtl.c (flag_dump_unnumbered, flag_dump_unnumbered_links):
	Only define for generator programs.
	* rtlanal.c (target_flags): Remove.
	* toplev.c (flag_var_tracking, flag_var_tracking_assignments,
	flag_var_tracking_assignments_toggle): Remove.

From-SVN: r164370

gcc/ChangeLog

+2010-09-17  Joseph Myers  <joseph@codesourcery.com>
+
+	* doc/options.texi (Variable): Document.
+	* optc-gen.awk, opth-gen.awk: Handle Variable records.  Don't
+	generate target_flags declarations explicitly.  Don't define
+	VarExists variables for the driver.
+	* common.opt (target_flags): New Variable record.
+	(flag_dump_unnumbered, flag_dump_unnumbered_links,
+	flag_var_tracking, flag_var_tracking_assignments,
+	flag_var_tracking_assignments_toggle): Don't mark variables with
+	VarExists.
+	* config/i386/i386.c (ix86_isa_flags): Don't define here.
+	* config/i386/i386.opt (ix86_isa_flags): Define here.
+	* config/mcore/mcore.c (mcore_stack_increment): Don't define here.
+	* config/mcore/mcore.opt (mcore_stack_increment): Don't mark with
+	VarExists.
+	* flags.h (flag_dump_unnumbered, flag_var_tracking): Remove.
+	* print-rtl.c (flag_dump_unnumbered, flag_dump_unnumbered_links):
+	Only define for generator programs.
+	* rtlanal.c (target_flags): Remove.
+	* toplev.c (flag_var_tracking, flag_var_tracking_assignments,
+	flag_var_tracking_assignments_toggle): Remove.
+
 2010-09-17  Michael Matz  <matz@suse.de>
 
 	PR tree-optimization/43432

gcc/common.opt

@@ -23,6 +23,9 @@
 
 ; Please try to keep this file in ASCII collating order.
 
+Variable
+int target_flags
+
 ###
 Driver
 
@@ -552,11 +555,11 @@ Common Report Var(flag_dump_noaddr)
 Suppress output of addresses in debugging dumps
 
 fdump-unnumbered
-Common Report Var(flag_dump_unnumbered) VarExists
+Common Report Var(flag_dump_unnumbered)
 Suppress output of instruction numbers, line number notes and addresses in debugging dumps
 
 fdump-unnumbered-links
-Common Report Var(flag_dump_unnumbered_links) VarExists
+Common Report Var(flag_dump_unnumbered_links)
 Suppress output of previous and next insn numbers in debugging dumps
 
 fdwarf2-cfi-asm
@@ -1511,16 +1514,27 @@ Just generate unwind tables for exception handling
 fuse-linker-plugin
 Common Undocumented
 
+; Positive if we should track variables, negative if we should run
+; the var-tracking pass only to discard debug annotations, zero if
+; we're not to run it.  When flag_var_tracking == 2 (AUTODETECT_VALUE) it
+; will be set according to optimize, debug_info_level and debug_hooks
+; in process_options ().
 fvar-tracking
-Common Report Var(flag_var_tracking) VarExists Optimization
+Common Report Var(flag_var_tracking) Init(2) Optimization
 Perform variable tracking
 
+; Positive if we should track variables at assignments, negative if
+; we should run the var-tracking pass only to discard debug
+; annotations.  When flag_var_tracking_assignments ==
+; AUTODETECT_VALUE it will be set according to flag_var_tracking.
 fvar-tracking-assignments
-Common Report Var(flag_var_tracking_assignments) VarExists Optimization
+Common Report Var(flag_var_tracking_assignments) Init(2) Optimization
 Perform variable tracking by annotating assignments
 
+; Nonzero if we should toggle flag_var_tracking_assignments after
+; processing options and computing its default.  */
 fvar-tracking-assignments-toggle
-Common Report Var(flag_var_tracking_assignments_toggle) VarExists Optimization
+Common Report Var(flag_var_tracking_assignments_toggle) Optimization
 Toggle -fvar-tracking-assignments
 
 fvar-tracking-uninit

gcc/config/i386/i386.c

@@ -2025,9 +2025,6 @@ static enum calling_abi ix86_function_abi (const_tree);
 static int ix86_tune_defaulted;
 static int ix86_arch_specified;
 
-/* Bit flags that specify the ISA we are compiling for.  */
-int ix86_isa_flags = TARGET_64BIT_DEFAULT | TARGET_SUBTARGET_ISA_DEFAULT;
-
 /* A mask of ix86_isa_flags that includes bit X if X
    was set or cleared on the command line.  */
 static int ix86_isa_flags_explicit;

gcc/config/i386/i386.opt

@@ -19,6 +19,10 @@
 ; along with GCC; see the file COPYING3.  If not see
 ; <http://www.gnu.org/licenses/>.
 
+; Bit flags that specify the ISA we are compiling for.
+Variable
+int ix86_isa_flags = TARGET_64BIT_DEFAULT | TARGET_SUBTARGET_ISA_DEFAULT
+
 ;; Definitions to add to the cl_target_option structure
 ;; -march= processor
 TargetSave

gcc/config/mcore/mcore.c

@@ -46,11 +46,6 @@
 #include "target-def.h"
 #include "df.h"
 
-/* Maximum size we are allowed to grow the stack in a single operation.
-   If we want more, we must do it in increments of at most this size.
-   If this value is 0, we don't check at all.  */
-int mcore_stack_increment = STACK_UNITS_MAXSTEP;
-
 /* For dumping information about frame sizes.  */
 char * mcore_current_function_name = 0;
 long   mcore_current_compilation_timestamp = 0;

gcc/config/mcore/mcore.opt

@@ -63,8 +63,11 @@ mslow-bytes
 Target Report Mask(SLOW_BYTES)
 Prefer word accesses over byte accesses
 
+; Maximum size we are allowed to grow the stack in a single operation.
+; If we want more, we must do it in increments of at most this size.
+; If this value is 0, we don't check at all.
 mstack-increment=
-Target RejectNegative Joined UInteger Var(mcore_stack_increment) VarExists
+Target RejectNegative Joined UInteger Var(mcore_stack_increment) Init(STACK_UNITS_MAXSTEP)
 Set the maximum amount for a single stack increment operation
 
 mwide-bitfields

gcc/doc/options.texi

@@ -41,6 +41,17 @@ records have two fields: the string @samp{TargetSave}, and a
 declaration type to go in the @code{cl_target_option} structure.
 
 @item
+A variable record to define a variable used to store option
+information.  These records have two fields: the string
+@samp{Variable}, and a declaration of the type and name of the
+variable, optionally with an initializer (but without any trailing
+@samp{;}).  These records may be used for variables used for many
+options where declaring the variable and its initializer by omitting
+@code{VarExists} from a single option definition record would be
+inappropriate, or for variables set in option handlers rather than
+referenced by @code{Var} properties.
+
+@item
 An option definition record.  These records have the following fields:
 @enumerate
 @item

gcc/flags.h

@@ -164,11 +164,6 @@ extern int rtl_dump_and_exit;
 
 extern int flag_gen_aux_info;
 
-/* Nonzero means suppress output of instruction numbers and line number
-   notes in debugging dumps.  */
-
-extern int flag_dump_unnumbered;
-
 /* True if printing into -fdump-final-insns= dump.  */
 
 extern bool final_insns_dump_p;
@@ -301,9 +296,6 @@ enum graph_dump_types
 };
 extern enum graph_dump_types graph_dump_format;
 
-/* Nonzero if we should track variables.  */
-extern int flag_var_tracking;
-
 /* True if flag_speculative_prefetching was set by user.  Used to suppress
    warning message in case flag was set by -fprofile-{generate,use}.  */
 extern bool flag_speculative_prefetching_set;

gcc/optc-gen.awk

@@ -30,6 +30,7 @@ BEGIN {
 	n_opts = 0
 	n_langs = 0
 	n_target_save = 0
+	n_extra_vars = 0
         quote = "\042"
 	comma = ","
 	FS=SUBSEP
@@ -48,6 +49,10 @@ BEGIN {
 			target_save_decl[n_target_save] = $2
 			n_target_save++
 		}
+		else if ($1 == "Variable") {
+			extra_vars[n_extra_vars] = $2
+			n_extra_vars++
+		}
 		else {
 			name = opt_args("Mask", $1)
 			if (name == "") {
@@ -72,7 +77,6 @@ print "#include " quote "opts.h" quote
 print "#include " quote "intl.h" quote
 print ""
 print "#ifdef GCC_DRIVER"
-print "int target_flags;"
 print "int target_flags_explicit;"
 print "#else"
 print "#include " quote "flags.h" quote
@@ -81,6 +85,9 @@ print "#endif /* GCC_DRIVER */"
 print ""
 
 have_save = 0;
+for (i = 0; i < n_extra_vars; i++) {
+	print extra_vars[i] ";"
+}
 for (i = 0; i < n_opts; i++) {
 	if (flag_set_p("Save", flags[i]))
 		have_save = 1;
@@ -90,11 +97,7 @@ for (i = 0; i < n_opts; i++) {
 		continue;
 
 	if (flag_set_p("VarExists", flags[i])) {
-		# Need it for the gcc driver.
-		if (name in var_seen)
-			continue;
-		init = ""
-		gcc_driver = 1
+		continue;
 	}
 	else {
 		init = opt_args("Init", flags[i])
@@ -102,16 +105,11 @@ for (i = 0; i < n_opts; i++) {
 			init = " = " init;
 		else if (name in var_seen)
 			continue;
-		gcc_driver = 0
 	}
 
-	if (gcc_driver == 1)
-		print "#ifdef GCC_DRIVER"
 	print "/* Set by -" opts[i] "."
 	print "   " help[i] "  */"
 	print var_type(flags[i]) name init ";"
-	if (gcc_driver == 1)
-		print "#endif /* GCC_DRIVER */"
 	print ""
 
 	var_seen[name] = 1;

gcc/opth-gen.awk

@@ -28,6 +28,7 @@ BEGIN {
 	n_opts = 0
 	n_langs = 0
 	n_target_save = 0
+	n_extra_vars = 0
 	n_extra_masks = 0
 	FS=SUBSEP
 }
@@ -43,6 +44,10 @@ BEGIN {
 			target_save_decl[n_target_save] = $2
 			n_target_save++
 		}
+		else if ($1 == "Variable") {
+			extra_vars[n_extra_vars] = $2
+			n_extra_vars++
+		}
 		else {
 			name = opt_args("Mask", $1)
 			if (name == "") {
@@ -65,12 +70,17 @@ print ""
 print "#ifndef OPTIONS_H"
 print "#define OPTIONS_H"
 print ""
-print "extern int target_flags;"
 print "extern int target_flags_explicit;"
 print ""
 
 have_save = 0;
 
+for (i = 0; i < n_extra_vars; i++) {
+	var = extra_vars[i]
+	sub(" *=.*", "", var)
+	print "extern " var ";"
+}
+
 for (i = 0; i < n_opts; i++) {
 	if (flag_set_p("Save", flags[i]))
 		have_save = 1;

gcc/print-rtl.c

@@ -58,6 +58,10 @@ static void print_rtx (const_rtx);
    the assembly output file.  */
 const char *print_rtx_head = "";
 
+#ifdef GENERATOR_FILE
+/* These are defined from the .opt file when not used in generator
+   programs.  */
+
 /* Nonzero means suppress output of instruction numbers
    in debugging dumps.
    This must be defined here so that programs like gencodes can be linked.  */
@@ -67,6 +71,7 @@ int flag_dump_unnumbered = 0;
    and next insns in debugging dumps.
    This must be defined here so that programs like gencodes can be linked.  */
 int flag_dump_unnumbered_links = 0;
+#endif
 
 /* Nonzero means use simplified format without flags, modes, etc.  */
 int flag_simple = 0;

gcc/rtlanal.c

 /* Analyze RTL for GNU compiler.
    Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
-   1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+   1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
    Free Software Foundation, Inc.
 
 This file is part of GCC.
@@ -64,12 +64,6 @@ static unsigned int num_sign_bit_copies1 (const_rtx, enum machine_mode, const_rt
    -1 if a code has no such operand.  */
 static int non_rtx_starting_operands[NUM_RTX_CODE];
 
-/* Bit flags that specify the machine subtype we are compiling for.
-   Bits are tested using macros TARGET_... defined in the tm.h file
-   and set by `-m...' switches.  Must be defined in rtlanal.c.  */
-
-int target_flags;
-
 /* Truncation narrows the mode from SOURCE mode to DESTINATION mode.
    If TARGET_MODE_REP_EXTENDED (DESTINATION, DESTINATION_REP) is
    SIGN_EXTEND then while narrowing we also have to enforce the

gcc/toplev.c

@@ -291,23 +291,6 @@ int flag_dump_rtl_in_asm = 0;
    the support provided depends on the backend.  */
 rtx stack_limit_rtx;
 
-/* Positive if we should track variables, negative if we should run
-   the var-tracking pass only to discard debug annotations, zero if
-   we're not to run it.  When flag_var_tracking == AUTODETECT_VALUE it
-   will be set according to optimize, debug_info_level and debug_hooks
-   in process_options ().  */
-int flag_var_tracking = AUTODETECT_VALUE;
-
-/* Positive if we should track variables at assignments, negative if
-   we should run the var-tracking pass only to discard debug
-   annotations.  When flag_var_tracking_assignments ==
-   AUTODETECT_VALUE it will be set according to flag_var_tracking.  */
-int flag_var_tracking_assignments = AUTODETECT_VALUE;
-
-/* Nonzero if we should toggle flag_var_tracking_assignments after
-   processing options and computing its default.  */
-int flag_var_tracking_assignments_toggle = 0;
-
 /* Type of stack check.  */
 enum stack_check_type flag_stack_check = NO_STACK_CHECK;