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gcc.gnu.org Git - gcc.git/blob - gcc/timevar.h
1 /* Timing variables for measuring compiler performance.
2 Copyright (C) 2000, 2003, 2004, 2005, 2007, 2009
3 Free Software Foundation, Inc.
4 Contributed by Alex Samuel <samuel@codesourcery.com>
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GCC is distributed in the hope that it will be useful, but WITHOUT
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
16 License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
25 /* Timing variables are used to measure elapsed time in various
26 portions of the compiler. Each measures elapsed user, system, and
27 wall-clock time, as appropriate to and supported by the host
30 Timing variables are defined using the DEFTIMEVAR macro in
31 timevar.def. Each has an enumeral identifier, used when referring
32 to the timing variable in code, and a character string name.
34 Timing variables can be used in two ways:
36 - On the timing stack, using timevar_push and timevar_pop.
37 Timing variables may be pushed onto the stack; elapsed time is
38 attributed to the topmost timing variable on the stack. When
39 another variable is pushed on, the previous topmost variable is
40 `paused' until the pushed variable is popped back off.
42 - As a standalone timer, using timevar_start and timevar_stop.
43 All time elapsed between the two calls is attributed to the
47 /* This structure stores the various varieties of time that can be
48 measured. Times are stored in seconds. The time may be an
49 absolute time or a time difference; in the former case, the time
50 base is undefined, except that the difference between two times
51 produces a valid time difference. */
53 struct timevar_time_def
55 /* User time in this process. */
58 /* System time (if applicable for this host platform) in this
62 /* Wall clock time. */
65 /* Garbage collector memory. */
69 /* An enumeration of timing variable identifiers. Constructed from
70 the contents of timevar.def. */
72 #define DEFTIMEVAR(identifier__, name__) \
77 #include "timevar.def"
83 /* True if timevars should be used. In GCC, this happens with
84 the -ftime-report flag. */
85 extern bool timevar_enable
;
87 /* Total amount of memory allocated by garbage collector. */
88 extern size_t timevar_ggc_mem_total
;
90 /* Execute the sequence: timevar_pop (TV), return (E); */
91 #define POP_TIMEVAR_AND_RETURN(TV, E) do { timevar_pop (TV); return (E); }while(0)
93 extern void timevar_init (void);
94 extern void timevar_push_1 (timevar_id_t
);
95 extern void timevar_pop_1 (timevar_id_t
);
96 extern void timevar_start (timevar_id_t
);
97 extern void timevar_stop (timevar_id_t
);
98 extern void timevar_print (FILE *);
100 /* Provided for backward compatibility. */
102 timevar_push (timevar_id_t tv
)
109 timevar_pop (timevar_id_t tv
)
115 extern void print_time (const char *, long);
117 #endif /* ! GCC_TIMEVAR_H */
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