1/* Compilation switch flag definitions for GCC.
2 Copyright (C) 1987, 1988, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002,
3 2003, 2004, 2005, 2006, 2007
4 Free Software Foundation, Inc.
5
6This file is part of GCC.
7
8GCC is free software; you can redistribute it and/or modify it under
9the terms of the GNU General Public License as published by the Free
10Software Foundation; either version 2, or (at your option) any later
11version.
12
13GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14WARRANTY; without even the implied warranty of MERCHANTABILITY or
15FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16for more details.
17
18You should have received a copy of the GNU General Public License
19along with GCC; see the file COPYING. If not, write to the Free
20Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
2102110-1301, USA. */
22
23#ifndef GCC_FLAGS_H
24#define GCC_FLAGS_H
25
26#include "options.h"
27
28enum debug_info_type
29{
30 NO_DEBUG, /* Write no debug info. */
31 DBX_DEBUG, /* Write BSD .stabs for DBX (using dbxout.c). */
32 SDB_DEBUG, /* Write COFF for (old) SDB (using sdbout.c). */
33 DWARF2_DEBUG, /* Write Dwarf v2 debug info (using dwarf2out.c). */
34 XCOFF_DEBUG, /* Write IBM/Xcoff debug info (using dbxout.c). */
35 VMS_DEBUG, /* Write VMS debug info (using vmsdbgout.c). */
36 VMS_AND_DWARF2_DEBUG /* Write VMS debug info (using vmsdbgout.c).
37 and DWARF v2 debug info (using dwarf2out.c). */
38};
39
40/* Specify which kind of debugging info to generate. */
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53
54/* Specify how much debugging info to generate. */
55extern enum debug_info_level debug_info_level;
56
57/* Nonzero means use GNU-only extensions in the generated symbolic
58 debugging information. */
59extern bool use_gnu_debug_info_extensions;
60
61/* Enumerate visibility settings. This is deliberately ordered from most
62 to least visibility. */
63#ifndef SYMBOL_VISIBILITY_DEFINED
64#define SYMBOL_VISIBILITY_DEFINED
65enum symbol_visibility
66{
67 VISIBILITY_DEFAULT,
68 VISIBILITY_PROTECTED,
69 VISIBILITY_HIDDEN,
70 VISIBILITY_INTERNAL
71};
72#endif
73
74/* The default visibility for all symbols (unless overridden). */
75extern enum symbol_visibility default_visibility;
76
77struct visibility_flags
78{
79 unsigned inpragma : 1; /* True when in #pragma GCC visibility. */
80 unsigned inlines_hidden : 1; /* True when -finlineshidden in effect. */
81};
82
83/* Global visibility options. */
84extern struct visibility_flags visibility_options;
85
86/* Nonzero means do optimizations. -opt. */
87
88extern int optimize;
89
90/* Nonzero means optimize for size. -Os. */
91
92extern int optimize_size;
93
94/* Do print extra warnings (such as for uninitialized variables).
95 -W/-Wextra. */
96
97extern bool extra_warnings;
98
99/* Nonzero to warn about unused variables, functions et.al. Use
100 set_Wunused() to update the -Wunused-* flags that correspond to the
101 -Wunused option. */
102
103extern void set_Wunused (int setting);
104
105/* Nonzero means warn about any objects definitions whose size is larger
106 than N bytes. Also want about function definitions whose returned
107 values are larger than N bytes. The value N is in `larger_than_size'. */
108
109extern bool warn_larger_than;
110extern HOST_WIDE_INT larger_than_size;
111
112/* Nonzero means warn about constructs which might not be strict
113 aliasing safe. */
114
115extern int warn_strict_aliasing;
116
117/* Nonzero means warn about optimizations which rely on undefined
118 signed overflow. */
119
120extern int warn_strict_overflow;
121
122/* Temporarily suppress certain warnings.
123 This is set while reading code from a system header file. */
124
125extern int in_system_header;
126
127/* Nonzero for -dp: annotate the assembly with a comment describing the
128 pattern and alternative used. */
129
130extern int flag_print_asm_name;
131
132/* Now the symbols that are set with `-f' switches. */
133
134/* Nonzero means `char' should be signed. */
135
136extern int flag_signed_char;
137
138/* Nonzero means give an enum type only as many bytes as it needs. A value
139 of 2 means it has not yet been initialized. */
140
141extern int flag_short_enums;
142
143/* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
144
145extern int flag_pcc_struct_return;
146
147/* 0 means straightforward implementation of complex divide acceptable.
148 1 means wide ranges of inputs must work for complex divide.
149 2 means C99-like requirements for complex multiply and divide. */
150
151extern int flag_complex_method;
152
153/* Nonzero means that we don't want inlining by virtue of -fno-inline,
154 not just because the tree inliner turned us off. */
155
156extern int flag_really_no_inline;
157
158/* Nonzero if we are only using compiler to check syntax errors. */
159
160extern int rtl_dump_and_exit;
161
162/* Nonzero means we should save auxiliary info into a .X file. */
163
164extern int flag_gen_aux_info;
165
166/* Nonzero means suppress output of instruction numbers and line number
167 notes in debugging dumps. */
168
169extern int flag_dump_unnumbered;
170
171/* Nonzero means change certain warnings into errors.
172 Usually these are warnings about failure to conform to some standard. */
173
174extern int flag_pedantic_errors;
175
176/* Nonzero if we are compiling code for a shared library, zero for
177 executable. */
178
179extern int flag_shlib;
180
181/* -dA causes debug information to be produced in
182 the generated assembly code (to make it more readable). This option
183 is generally only of use to those who actually need to read the
184 generated assembly code (perhaps while debugging the compiler itself).
185 Currently, this switch is only used by dwarfout.c; however, it is intended
186 to be a catchall for printing debug information in the assembler file. */
187
188extern int flag_debug_asm;
189
190/* Generate code for GNU or NeXT Objective-C runtime environment. */
191
192extern int flag_next_runtime;
193
194extern int flag_dump_rtl_in_asm;
195
196/* If one, renumber instruction UIDs to reduce the number of
197 unused UIDs if there are a lot of instructions. If greater than
198 one, unconditionally renumber instruction UIDs. */
199extern int flag_renumber_insns;
200
201/* Other basic status info about current function. */
202
203/* Nonzero means current function must be given a frame pointer.
204 Set in stmt.c if anything is allocated on the stack there.
205 Set in reload1.c if anything is allocated on the stack there. */
206
207extern int frame_pointer_needed;
208
209/* Nonzero if subexpressions must be evaluated from left-to-right. */
210extern int flag_evaluation_order;
211
212/* Value of the -G xx switch, and whether it was passed or not. */
213extern unsigned HOST_WIDE_INT g_switch_value;
214extern bool g_switch_set;
215
216/* Values of the -falign-* flags: how much to align labels in code.
217 0 means `use default', 1 means `don't align'.
218 For each variable, there is an _log variant which is the power
219 of two not less than the variable, for .align output. */
220
221extern int align_loops_log;
222extern int align_loops_max_skip;
223extern int align_jumps_log;
224extern int align_jumps_max_skip;
225extern int align_labels_log;
226extern int align_labels_max_skip;
227extern int align_functions_log;
228
229/* Like align_functions_log above, but used by front-ends to force the
230 minimum function alignment. Zero means no alignment is forced. */
231extern int force_align_functions_log;
232
233/* Nonzero if we dump in VCG format, not plain text. */
234extern int dump_for_graph;
235
236/* Selection of the graph form. */
237enum graph_dump_types
238{
239 no_graph = 0,
240 vcg
241};
242extern enum graph_dump_types graph_dump_format;
243
244/* Nonzero means to collect statistics which might be expensive
245 and to print them when we are done. */
246extern int flag_detailed_statistics;
247
248/* Nonzero means that we defer emitting functions until they are actually
249 used. */
250extern int flag_remove_unreachable_functions;
251
252/* Nonzero if we should track variables. */
253extern int flag_var_tracking;
254
255/* True if flag_speculative_prefetching was set by user. Used to suppress
256 warning message in case flag was set by -fprofile-{generate,use}. */
257extern bool flag_speculative_prefetching_set;
258
259/* A string that's used when a random name is required. NULL means
260 to make it really random. */
261
262extern const char *flag_random_seed;
263
264/* Returns TRUE if generated code should match ABI version N or
265 greater is in use. */
266
267#define abi_version_at_least(N) \
268 (flag_abi_version == 0 || flag_abi_version >= (N))
269
270/* True if the given mode has a NaN representation and the treatment of
271 NaN operands is important. Certain optimizations, such as folding
272 x * 0 into 0, are not correct for NaN operands, and are normally
273 disabled for modes with NaNs. The user can ask for them to be
274 done anyway using the -funsafe-math-optimizations switch. */
275#define HONOR_NANS(MODE) \
276 (MODE_HAS_NANS (MODE) && !flag_finite_math_only)
277
278/* Like HONOR_NANs, but true if we honor signaling NaNs (or sNaNs). */
279#define HONOR_SNANS(MODE) (flag_signaling_nans && HONOR_NANS (MODE))
280
--- 7 unchanged lines hidden (view full) ---
288#define HONOR_SIGNED_ZEROS(MODE) \
289 (MODE_HAS_SIGNED_ZEROS (MODE) && !flag_unsafe_math_optimizations)
290
291/* Like HONOR_NANS, but true if given mode supports sign-dependent rounding,
292 and the rounding mode is important. */
293#define HONOR_SIGN_DEPENDENT_ROUNDING(MODE) \
294 (MODE_HAS_SIGN_DEPENDENT_ROUNDING (MODE) && flag_rounding_math)
295
296/* True if overflow wraps around for the given integral type. That
297 is, TYPE_MAX + 1 == TYPE_MIN. */
298#define TYPE_OVERFLOW_WRAPS(TYPE) \
299 (TYPE_UNSIGNED (TYPE) || flag_wrapv)
300
301/* True if overflow is undefined for the given integral type. We may
302 optimize on the assumption that values in the type never overflow.
303
304 IMPORTANT NOTE: Any optimization based on TYPE_OVERFLOW_UNDEFINED
305 must issue a warning based on warn_strict_overflow. In some cases
306 it will be appropriate to issue the warning immediately, and in
307 other cases it will be appropriate to simply set a flag and let the
308 caller decide whether a warning is appropriate or not. */
309#define TYPE_OVERFLOW_UNDEFINED(TYPE) \
310 (!TYPE_UNSIGNED (TYPE) && !flag_wrapv && !flag_trapv && flag_strict_overflow)
311
312/* True if overflow for the given integral type should issue a
313 trap. */
314#define TYPE_OVERFLOW_TRAPS(TYPE) \
315 (!TYPE_UNSIGNED (TYPE) && flag_trapv)
316
317/* Names for the different levels of -Wstrict-overflow=N. The numeric
318 values here correspond to N. */
319
320enum warn_strict_overflow_code
321{
322 /* Overflow warning that should be issued with -Wall: a questionable
323 construct that is easy to avoid even when using macros. Example:
324 folding (x + CONSTANT > x) to 1. */
325 WARN_STRICT_OVERFLOW_ALL = 1,
326 /* Overflow warning about folding a comparison to a constant because
327 of undefined signed overflow, other than cases covered by
328 WARN_STRICT_OVERFLOW_ALL. Example: folding (abs (x) >= 0) to 1
329 (this is false when x == INT_MIN). */
330 WARN_STRICT_OVERFLOW_CONDITIONAL = 2,
331 /* Overflow warning about changes to comparisons other than folding
332 them to a constant. Example: folding (x + 1 > 1) to (x > 0). */
333 WARN_STRICT_OVERFLOW_COMPARISON = 3,
334 /* Overflow warnings not covered by the above cases. Example:
335 folding ((x * 10) / 5) to (x * 2). */
336 WARN_STRICT_OVERFLOW_MISC = 4,
337 /* Overflow warnings about reducing magnitude of constants in
338 comparison. Example: folding (x + 2 > y) to (x + 1 >= y). */
339 WARN_STRICT_OVERFLOW_MAGNITUDE = 5
340};
341
342/* Whether to emit an overflow warning whose code is C. */
343#define issue_strict_overflow_warning(c) (warn_strict_overflow >= (int) (c))
344
345#endif /* ! GCC_FLAGS_H */
2 Copyright (C) 1987, 1988, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002,
3 2003, 2004, 2005, 2006, 2007
4 Free Software Foundation, Inc.
5
6This file is part of GCC.
7
8GCC is free software; you can redistribute it and/or modify it under
9the terms of the GNU General Public License as published by the Free
10Software Foundation; either version 2, or (at your option) any later
11version.
12
13GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14WARRANTY; without even the implied warranty of MERCHANTABILITY or
15FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16for more details.
17
18You should have received a copy of the GNU General Public License
19along with GCC; see the file COPYING. If not, write to the Free
20Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
2102110-1301, USA. */
22
23#ifndef GCC_FLAGS_H
24#define GCC_FLAGS_H
25
26#include "options.h"
27
28enum debug_info_type
29{
30 NO_DEBUG, /* Write no debug info. */
31 DBX_DEBUG, /* Write BSD .stabs for DBX (using dbxout.c). */
32 SDB_DEBUG, /* Write COFF for (old) SDB (using sdbout.c). */
33 DWARF2_DEBUG, /* Write Dwarf v2 debug info (using dwarf2out.c). */
34 XCOFF_DEBUG, /* Write IBM/Xcoff debug info (using dbxout.c). */
35 VMS_DEBUG, /* Write VMS debug info (using vmsdbgout.c). */
36 VMS_AND_DWARF2_DEBUG /* Write VMS debug info (using vmsdbgout.c).
37 and DWARF v2 debug info (using dwarf2out.c). */
38};
39
40/* Specify which kind of debugging info to generate. */
--- 12 unchanged lines hidden (view full) ---
53
54/* Specify how much debugging info to generate. */
55extern enum debug_info_level debug_info_level;
56
57/* Nonzero means use GNU-only extensions in the generated symbolic
58 debugging information. */
59extern bool use_gnu_debug_info_extensions;
60
61/* Enumerate visibility settings. This is deliberately ordered from most
62 to least visibility. */
63#ifndef SYMBOL_VISIBILITY_DEFINED
64#define SYMBOL_VISIBILITY_DEFINED
65enum symbol_visibility
66{
67 VISIBILITY_DEFAULT,
68 VISIBILITY_PROTECTED,
69 VISIBILITY_HIDDEN,
70 VISIBILITY_INTERNAL
71};
72#endif
73
74/* The default visibility for all symbols (unless overridden). */
75extern enum symbol_visibility default_visibility;
76
77struct visibility_flags
78{
79 unsigned inpragma : 1; /* True when in #pragma GCC visibility. */
80 unsigned inlines_hidden : 1; /* True when -finlineshidden in effect. */
81};
82
83/* Global visibility options. */
84extern struct visibility_flags visibility_options;
85
86/* Nonzero means do optimizations. -opt. */
87
88extern int optimize;
89
90/* Nonzero means optimize for size. -Os. */
91
92extern int optimize_size;
93
94/* Do print extra warnings (such as for uninitialized variables).
95 -W/-Wextra. */
96
97extern bool extra_warnings;
98
99/* Nonzero to warn about unused variables, functions et.al. Use
100 set_Wunused() to update the -Wunused-* flags that correspond to the
101 -Wunused option. */
102
103extern void set_Wunused (int setting);
104
105/* Nonzero means warn about any objects definitions whose size is larger
106 than N bytes. Also want about function definitions whose returned
107 values are larger than N bytes. The value N is in `larger_than_size'. */
108
109extern bool warn_larger_than;
110extern HOST_WIDE_INT larger_than_size;
111
112/* Nonzero means warn about constructs which might not be strict
113 aliasing safe. */
114
115extern int warn_strict_aliasing;
116
117/* Nonzero means warn about optimizations which rely on undefined
118 signed overflow. */
119
120extern int warn_strict_overflow;
121
122/* Temporarily suppress certain warnings.
123 This is set while reading code from a system header file. */
124
125extern int in_system_header;
126
127/* Nonzero for -dp: annotate the assembly with a comment describing the
128 pattern and alternative used. */
129
130extern int flag_print_asm_name;
131
132/* Now the symbols that are set with `-f' switches. */
133
134/* Nonzero means `char' should be signed. */
135
136extern int flag_signed_char;
137
138/* Nonzero means give an enum type only as many bytes as it needs. A value
139 of 2 means it has not yet been initialized. */
140
141extern int flag_short_enums;
142
143/* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
144
145extern int flag_pcc_struct_return;
146
147/* 0 means straightforward implementation of complex divide acceptable.
148 1 means wide ranges of inputs must work for complex divide.
149 2 means C99-like requirements for complex multiply and divide. */
150
151extern int flag_complex_method;
152
153/* Nonzero means that we don't want inlining by virtue of -fno-inline,
154 not just because the tree inliner turned us off. */
155
156extern int flag_really_no_inline;
157
158/* Nonzero if we are only using compiler to check syntax errors. */
159
160extern int rtl_dump_and_exit;
161
162/* Nonzero means we should save auxiliary info into a .X file. */
163
164extern int flag_gen_aux_info;
165
166/* Nonzero means suppress output of instruction numbers and line number
167 notes in debugging dumps. */
168
169extern int flag_dump_unnumbered;
170
171/* Nonzero means change certain warnings into errors.
172 Usually these are warnings about failure to conform to some standard. */
173
174extern int flag_pedantic_errors;
175
176/* Nonzero if we are compiling code for a shared library, zero for
177 executable. */
178
179extern int flag_shlib;
180
181/* -dA causes debug information to be produced in
182 the generated assembly code (to make it more readable). This option
183 is generally only of use to those who actually need to read the
184 generated assembly code (perhaps while debugging the compiler itself).
185 Currently, this switch is only used by dwarfout.c; however, it is intended
186 to be a catchall for printing debug information in the assembler file. */
187
188extern int flag_debug_asm;
189
190/* Generate code for GNU or NeXT Objective-C runtime environment. */
191
192extern int flag_next_runtime;
193
194extern int flag_dump_rtl_in_asm;
195
196/* If one, renumber instruction UIDs to reduce the number of
197 unused UIDs if there are a lot of instructions. If greater than
198 one, unconditionally renumber instruction UIDs. */
199extern int flag_renumber_insns;
200
201/* Other basic status info about current function. */
202
203/* Nonzero means current function must be given a frame pointer.
204 Set in stmt.c if anything is allocated on the stack there.
205 Set in reload1.c if anything is allocated on the stack there. */
206
207extern int frame_pointer_needed;
208
209/* Nonzero if subexpressions must be evaluated from left-to-right. */
210extern int flag_evaluation_order;
211
212/* Value of the -G xx switch, and whether it was passed or not. */
213extern unsigned HOST_WIDE_INT g_switch_value;
214extern bool g_switch_set;
215
216/* Values of the -falign-* flags: how much to align labels in code.
217 0 means `use default', 1 means `don't align'.
218 For each variable, there is an _log variant which is the power
219 of two not less than the variable, for .align output. */
220
221extern int align_loops_log;
222extern int align_loops_max_skip;
223extern int align_jumps_log;
224extern int align_jumps_max_skip;
225extern int align_labels_log;
226extern int align_labels_max_skip;
227extern int align_functions_log;
228
229/* Like align_functions_log above, but used by front-ends to force the
230 minimum function alignment. Zero means no alignment is forced. */
231extern int force_align_functions_log;
232
233/* Nonzero if we dump in VCG format, not plain text. */
234extern int dump_for_graph;
235
236/* Selection of the graph form. */
237enum graph_dump_types
238{
239 no_graph = 0,
240 vcg
241};
242extern enum graph_dump_types graph_dump_format;
243
244/* Nonzero means to collect statistics which might be expensive
245 and to print them when we are done. */
246extern int flag_detailed_statistics;
247
248/* Nonzero means that we defer emitting functions until they are actually
249 used. */
250extern int flag_remove_unreachable_functions;
251
252/* Nonzero if we should track variables. */
253extern int flag_var_tracking;
254
255/* True if flag_speculative_prefetching was set by user. Used to suppress
256 warning message in case flag was set by -fprofile-{generate,use}. */
257extern bool flag_speculative_prefetching_set;
258
259/* A string that's used when a random name is required. NULL means
260 to make it really random. */
261
262extern const char *flag_random_seed;
263
264/* Returns TRUE if generated code should match ABI version N or
265 greater is in use. */
266
267#define abi_version_at_least(N) \
268 (flag_abi_version == 0 || flag_abi_version >= (N))
269
270/* True if the given mode has a NaN representation and the treatment of
271 NaN operands is important. Certain optimizations, such as folding
272 x * 0 into 0, are not correct for NaN operands, and are normally
273 disabled for modes with NaNs. The user can ask for them to be
274 done anyway using the -funsafe-math-optimizations switch. */
275#define HONOR_NANS(MODE) \
276 (MODE_HAS_NANS (MODE) && !flag_finite_math_only)
277
278/* Like HONOR_NANs, but true if we honor signaling NaNs (or sNaNs). */
279#define HONOR_SNANS(MODE) (flag_signaling_nans && HONOR_NANS (MODE))
280
--- 7 unchanged lines hidden (view full) ---
288#define HONOR_SIGNED_ZEROS(MODE) \
289 (MODE_HAS_SIGNED_ZEROS (MODE) && !flag_unsafe_math_optimizations)
290
291/* Like HONOR_NANS, but true if given mode supports sign-dependent rounding,
292 and the rounding mode is important. */
293#define HONOR_SIGN_DEPENDENT_ROUNDING(MODE) \
294 (MODE_HAS_SIGN_DEPENDENT_ROUNDING (MODE) && flag_rounding_math)
295
296/* True if overflow wraps around for the given integral type. That
297 is, TYPE_MAX + 1 == TYPE_MIN. */
298#define TYPE_OVERFLOW_WRAPS(TYPE) \
299 (TYPE_UNSIGNED (TYPE) || flag_wrapv)
300
301/* True if overflow is undefined for the given integral type. We may
302 optimize on the assumption that values in the type never overflow.
303
304 IMPORTANT NOTE: Any optimization based on TYPE_OVERFLOW_UNDEFINED
305 must issue a warning based on warn_strict_overflow. In some cases
306 it will be appropriate to issue the warning immediately, and in
307 other cases it will be appropriate to simply set a flag and let the
308 caller decide whether a warning is appropriate or not. */
309#define TYPE_OVERFLOW_UNDEFINED(TYPE) \
310 (!TYPE_UNSIGNED (TYPE) && !flag_wrapv && !flag_trapv && flag_strict_overflow)
311
312/* True if overflow for the given integral type should issue a
313 trap. */
314#define TYPE_OVERFLOW_TRAPS(TYPE) \
315 (!TYPE_UNSIGNED (TYPE) && flag_trapv)
316
317/* Names for the different levels of -Wstrict-overflow=N. The numeric
318 values here correspond to N. */
319
320enum warn_strict_overflow_code
321{
322 /* Overflow warning that should be issued with -Wall: a questionable
323 construct that is easy to avoid even when using macros. Example:
324 folding (x + CONSTANT > x) to 1. */
325 WARN_STRICT_OVERFLOW_ALL = 1,
326 /* Overflow warning about folding a comparison to a constant because
327 of undefined signed overflow, other than cases covered by
328 WARN_STRICT_OVERFLOW_ALL. Example: folding (abs (x) >= 0) to 1
329 (this is false when x == INT_MIN). */
330 WARN_STRICT_OVERFLOW_CONDITIONAL = 2,
331 /* Overflow warning about changes to comparisons other than folding
332 them to a constant. Example: folding (x + 1 > 1) to (x > 0). */
333 WARN_STRICT_OVERFLOW_COMPARISON = 3,
334 /* Overflow warnings not covered by the above cases. Example:
335 folding ((x * 10) / 5) to (x * 2). */
336 WARN_STRICT_OVERFLOW_MISC = 4,
337 /* Overflow warnings about reducing magnitude of constants in
338 comparison. Example: folding (x + 2 > y) to (x + 1 >= y). */
339 WARN_STRICT_OVERFLOW_MAGNITUDE = 5
340};
341
342/* Whether to emit an overflow warning whose code is C. */
343#define issue_strict_overflow_warning(c) (warn_strict_overflow >= (int) (c))
344
345#endif /* ! GCC_FLAGS_H */