Steal GCC's --time-report support.

* lib/timevar.c, lib/timevar.h, lib/timevar.def: New,
stolen/adjusted from GCC.
* m4/stage.m4: Remove time related checks.
* m4/timevar.m4: New.
* configure.in: Adjust.
* src/system.h: Adjust to using timevar.h.
* src/getargs.h, src/getargs.c: Support trace_time for
--trace=time.
* src/main.c (stage): Remove.
(main): Replace `stage' invocations with timevar calls.
* src/output.c: Insert pertinent timevar calls.

1 files changed, 553 insertions, 0 deletions

diff --git a/lib/timevar.c b/lib/timevar.c
new file mode 100644
index 00000000..3cc38389
--- /dev/null
+++ b/lib/timevar.c
@@ -0,0 +1,553 @@
+/* Timing variables for measuring compiler performance.
+   Copyright (C) 2000 Free Software Foundation, Inc.
+   Contributed by Alex Samuel <samuel@codesourcery.com>
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING.  If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA.  */
+
+#if IN_GCC
+
+/* These are the original includes --akim.  */
+#include "config.h"
+#include "system.h"
+#include "intl.h"
+#include "rtl.h"
+
+#else
+
+/* These are my replacements by hand --akim.
+   There is another change below, flag with IN_GCC.  */
+# include "../src/system.h"
+int time_report = 0;
+
+#endif
+
+
+#ifdef HAVE_SYS_TIMES_H
+# include <sys/times.h>
+#endif
+#ifdef HAVE_SYS_RESOURCE_H
+#include <sys/resource.h>
+#endif
+
+#ifndef HAVE_CLOCK_T
+typedef int clock_t;
+#endif
+
+#ifndef HAVE_STRUCT_TMS
+struct tms
+{
+  clock_t tms_utime;
+  clock_t tms_stime;
+  clock_t tms_cutime;
+  clock_t tms_cstime;
+};
+#endif
+
+#if defined HAVE_DECL_GETRUSAGE && !HAVE_DECL_GETRUSAGE
+extern int getrusage PARAMS ((int, struct rusage *));
+#endif
+#if defined HAVE_DECL_TIMES && !HAVE_DECL_TIMES
+extern clock_t times PARAMS ((struct tms *));
+#endif
+#if defined HAVE_DECL_CLOCK && !HAVE_DECL_CLOCK
+extern clock_t clock PARAMS ((void));
+#endif
+
+#ifndef RUSAGE_SELF
+# define RUSAGE_SELF 0
+#endif
+
+/* Calculation of scale factor to convert ticks to microseconds.
+   We mustn't use CLOCKS_PER_SEC except with clock().  */
+#if HAVE_SYSCONF && defined _SC_CLK_TCK
+# define TICKS_PER_SECOND sysconf (_SC_CLK_TCK) /* POSIX 1003.1-1996 */
+#else
+# ifdef CLK_TCK
+#  define TICKS_PER_SECOND CLK_TCK /* POSIX 1003.1-1988; obsolescent */
+# else
+#  ifdef HZ
+#   define TICKS_PER_SECOND HZ  /* traditional UNIX */
+#  else
+#   define TICKS_PER_SECOND 100 /* often the correct value */
+#  endif
+# endif
+#endif
+
+/* Prefer times to getrusage to clock (each gives successively less
+   information).  */
+#ifdef HAVE_TIMES
+# define USE_TIMES
+# define HAVE_USER_TIME
+# define HAVE_SYS_TIME
+# define HAVE_WALL_TIME
+#else
+#ifdef HAVE_GETRUSAGE
+# define USE_GETRUSAGE
+# define HAVE_USER_TIME
+# define HAVE_SYS_TIME
+#else
+#ifdef HAVE_CLOCK
+# define USE_CLOCK
+# define HAVE_USER_TIME
+#endif
+#endif
+#endif
+
+/* libc is very likely to have snuck a call to sysconf() into one of
+   the underlying constants, and that can be very slow, so we have to
+   precompute them.  Whose wonderful idea was it to make all those
+   _constants_ variable at run time, anyway?  */
+#ifdef USE_TIMES
+static float ticks_to_msec;
+#define TICKS_TO_MSEC (1 / (float)TICKS_PER_SECOND)
+#endif
+
+#ifdef USE_CLOCK
+static float clocks_to_msec;
+#define CLOCKS_TO_MSEC (1 / (float)CLOCKS_PER_SEC)
+#endif
+
+#if IN_GCC
+#include "flags.h"
+#endif
+#include "timevar.h"
+
+/* See timevar.h for an explanation of timing variables.  */
+
+/* This macro evaluates to non-zero if timing variables are enabled.  */
+#define TIMEVAR_ENABLE (time_report)
+
+/* A timing variable.  */
+
+struct timevar_def
+{
+  /* Elapsed time for this variable.  */
+  struct timevar_time_def elapsed;
+
+  /* If this variable is timed independently of the timing stack,
+     using timevar_start, this contains the start time.  */
+  struct timevar_time_def start_time;
+
+  /* The name of this timing variable.  */
+  const char *name;
+
+  /* Non-zero if this timing variable is running as a standalone
+     timer.  */
+  unsigned standalone : 1;
+
+  /* Non-zero if this timing variable was ever started or pushed onto
+     the timing stack.  */
+  unsigned used : 1;
+};
+
+/* An element on the timing stack.  Elapsed time is attributed to the
+   topmost timing variable on the stack.  */
+
+struct timevar_stack_def
+{
+  /* The timing variable at this stack level.  */
+  struct timevar_def *timevar;
+
+  /* The next lower timing variable context in the stack.  */
+  struct timevar_stack_def *next;
+};
+
+/* Declared timing variables.  Constructed from the contents of
+   timevar.def.  */
+static struct timevar_def timevars[TIMEVAR_LAST];
+
+/* The top of the timing stack.  */
+static struct timevar_stack_def *stack;
+
+/* A list of unused (i.e. allocated and subsequently popped)
+   timevar_stack_def instances.  */
+static struct timevar_stack_def *unused_stack_instances;
+
+/* The time at which the topmost element on the timing stack was
+   pushed.  Time elapsed since then is attributed to the topmost
+   element.  */
+static struct timevar_time_def start_time;
+
+static void get_time
+  PARAMS ((struct timevar_time_def *));
+static void timevar_accumulate
+  PARAMS ((struct timevar_time_def *, struct timevar_time_def *,
+	   struct timevar_time_def *));
+
+/* Fill the current times into TIME.  The definition of this function
+   also defines any or all of the HAVE_USER_TIME, HAVE_SYS_TIME, and
+   HAVA_WALL_TIME macros.  */
+
+static void
+get_time (now)
+     struct timevar_time_def *now;
+{
+  now->user = 0;
+  now->sys  = 0;
+  now->wall = 0;
+
+  if (!TIMEVAR_ENABLE)
+    return;
+
+  {
+#ifdef USE_TIMES
+    struct tms tms;
+    now->wall = times (&tms)  * ticks_to_msec;
+    now->user = tms.tms_utime * ticks_to_msec;
+    now->sys  = tms.tms_stime * ticks_to_msec;
+#endif
+#ifdef USE_GETRUSAGE
+    struct rusage rusage;
+    getrusage (RUSAGE_SELF, &rusage);
+    now->user = rusage.ru_utime.tv_sec + rusage.ru_utime.tv_usec * 1e-6;
+    now->sys  = rusage.ru_stime.tv_sec + rusage.ru_stime.tv_usec * 1e-6;
+#endif
+#ifdef USE_CLOCK
+    now->user = clock () * clocks_to_msec;
+#endif
+  }
+}
+
+/* Add the difference between STOP_TIME and START_TIME to TIMER.  */
+
+static void
+timevar_accumulate (timer, start_time, stop_time)
+  struct timevar_time_def *timer;
+  struct timevar_time_def *start_time;
+  struct timevar_time_def *stop_time;
+{
+  timer->user += stop_time->user - start_time->user;
+  timer->sys += stop_time->sys - start_time->sys;
+  timer->wall += stop_time->wall - start_time->wall;
+}
+
+/* Initialize timing variables.  */
+
+void
+init_timevar ()
+{
+  if (!TIMEVAR_ENABLE)
+    return;
+
+  /* Zero all elapsed times.  */
+  memset ((void *) timevars, 0, sizeof (timevars));
+
+  /* Initialize the names of timing variables.  */
+#define DEFTIMEVAR(identifier__, name__) \
+  timevars[identifier__].name = name__;
+#include "timevar.def"
+#undef DEFTIMEVAR
+
+#ifdef USE_TIMES
+  ticks_to_msec = TICKS_TO_MSEC;
+#endif
+#ifdef USE_CLOCK
+  clocks_to_msec = CLOCKS_TO_MSEC;
+#endif
+}
+
+/* Push TIMEVAR onto the timing stack.  No further elapsed time is
+   attributed to the previous topmost timing variable on the stack;
+   subsequent elapsed time is attributed to TIMEVAR, until it is
+   popped or another element is pushed on top.
+
+   TIMEVAR cannot be running as a standalone timer.  */
+
+void
+timevar_push (timevar)
+     timevar_id_t timevar;
+{
+  struct timevar_def *tv = &timevars[timevar];
+  struct timevar_stack_def *context;
+  struct timevar_time_def now;
+
+  if (!TIMEVAR_ENABLE)
+    return;
+
+  /* Mark this timing variable as used.  */
+  tv->used = 1;
+
+  /* Can't push a standalone timer.  */
+  if (tv->standalone)
+    abort ();
+
+  /* What time is it?  */
+  get_time (&now);
+
+  /* If the stack isn't empty, attribute the current elapsed time to
+     the old topmost element.  */
+  if (stack)
+    timevar_accumulate (&stack->timevar->elapsed, &start_time, &now);
+
+  /* Reset the start time; from now on, time is attributed to
+     TIMEVAR.  */
+  start_time = now;
+
+  /* See if we have a previously-allocated stack instance.  If so,
+     take it off the list.  If not, malloc a new one.  */
+  if (unused_stack_instances != NULL)
+    {
+      context = unused_stack_instances;
+      unused_stack_instances = unused_stack_instances->next;
+    }
+  else
+    context = (struct timevar_stack_def *)
+      xmalloc (sizeof (struct timevar_stack_def));
+
+  /* Fill it in and put it on the stack.  */
+  context->timevar = tv;
+  context->next = stack;
+  stack = context;
+}
+
+/* Pop the topmost timing variable element off the timing stack.  The
+   popped variable must be TIMEVAR.  Elapsed time since the that
+   element was pushed on, or since it was last exposed on top of the
+   stack when the element above it was popped off, is credited to that
+   timing variable.  */
+
+void
+timevar_pop (timevar)
+     timevar_id_t timevar;
+{
+  struct timevar_time_def now;
+  struct timevar_stack_def *popped = stack;
+
+  if (!TIMEVAR_ENABLE)
+    return;
+
+  if (&timevars[timevar] != stack->timevar)
+    abort ();
+
+  /* What time is it?  */
+  get_time (&now);
+
+  /* Attribute the elapsed time to the element we're popping.  */
+  timevar_accumulate (&popped->timevar->elapsed, &start_time, &now);
+
+  /* Reset the start time; from now on, time is attributed to the
+     element just exposed on the stack.  */
+  start_time = now;
+
+  /* Take the item off the stack.  */
+  stack = stack->next;
+
+  /* Don't delete the stack element; instead, add it to the list of
+     unused elements for later use.  */
+  popped->next = unused_stack_instances;
+  unused_stack_instances = popped;
+}
+
+/* Start timing TIMEVAR independently of the timing stack.  Elapsed
+   time until timevar_stop is called for the same timing variable is
+   attributed to TIMEVAR.  */
+
+void
+timevar_start (timevar)
+     timevar_id_t timevar;
+{
+  struct timevar_def *tv = &timevars[timevar];
+
+  if (!TIMEVAR_ENABLE)
+    return;
+
+  /* Mark this timing variable as used.  */
+  tv->used = 1;
+
+  /* Don't allow the same timing variable to be started more than
+     once.  */
+  if (tv->standalone)
+    abort ();
+  tv->standalone = 1;
+
+  get_time (&tv->start_time);
+}
+
+/* Stop timing TIMEVAR.  Time elapsed since timevar_start was called
+   is attributed to it.  */
+
+void
+timevar_stop (timevar)
+     timevar_id_t timevar;
+{
+  struct timevar_def *tv = &timevars[timevar];
+  struct timevar_time_def now;
+
+  if (!TIMEVAR_ENABLE)
+    return;
+
+  /* TIMEVAR must have been started via timevar_start.  */
+  if (!tv->standalone)
+    abort ();
+
+  get_time (&now);
+  timevar_accumulate (&tv->elapsed, &tv->start_time, &now);
+}
+
+/* Fill the elapsed time for TIMEVAR into ELAPSED.  Returns
+   update-to-date information even if TIMEVAR is currently running.  */
+
+void
+timevar_get (timevar, elapsed)
+     timevar_id_t timevar;
+     struct timevar_time_def *elapsed;
+{
+  struct timevar_def *tv = &timevars[timevar];
+  struct timevar_time_def now;
+
+  *elapsed = tv->elapsed;
+
+  /* Is TIMEVAR currently running as a standalone timer?  */
+  if (tv->standalone)
+    {
+      get_time (&now);
+      timevar_accumulate (elapsed, &tv->start_time, &now);
+    }
+  /* Or is TIMEVAR at the top of the timer stack?  */
+  else if (stack->timevar == tv)
+    {
+      get_time (&now);
+      timevar_accumulate (elapsed, &start_time, &now);
+    }
+}
+
+/* Summarize timing variables to FP.  The timing variable TV_TOTAL has
+   a special meaning -- it's considered to be the total elapsed time,
+   for normalizing the others, and is displayed last.  */
+
+void
+timevar_print (fp)
+     FILE *fp;
+{
+  /* Only print stuff if we have some sort of time information.  */
+#if defined (HAVE_USER_TIME) || defined (HAVE_SYS_TIME) || defined (HAVE_WALL_TIME)
+  unsigned int /* timevar_id_t */ id;
+  struct timevar_time_def *total = &timevars[TV_TOTAL].elapsed;
+  struct timevar_time_def now;
+
+  if (!TIMEVAR_ENABLE)
+    return;
+
+  /* Update timing information in case we're calling this from GDB.  */
+
+  if (fp == 0)
+    fp = stderr;
+
+  /* What time is it?  */
+  get_time (&now);
+
+  /* If the stack isn't empty, attribute the current elapsed time to
+     the old topmost element.  */
+  if (stack)
+    timevar_accumulate (&stack->timevar->elapsed, &start_time, &now);
+
+  /* Reset the start time; from now on, time is attributed to
+     TIMEVAR.  */
+  start_time = now;
+
+  fputs (_("\nExecution times (seconds)\n"), fp);
+  for (id = 0; id < (unsigned int) TIMEVAR_LAST; ++id)
+    {
+      struct timevar_def *tv = &timevars[(timevar_id_t) id];
+      const float tiny = 5e-3;
+
+      /* Don't print the total execution time here; that goes at the
+	 end.  */
+      if ((timevar_id_t) id == TV_TOTAL)
+	continue;
+
+      /* Don't print timing variables that were never used.  */
+      if (!tv->used)
+	continue;
+
+      /* Don't print timing variables if we're going to get a row of
+         zeroes.  */
+      if (tv->elapsed.user < tiny
+	  && tv->elapsed.sys < tiny
+	  && tv->elapsed.wall < tiny)
+	continue;
+
+      /* The timing variable name.  */
+      fprintf (fp, " %-22s:", tv->name);
+
+#ifdef HAVE_USER_TIME
+      /* Print user-mode time for this process.  */
+      fprintf (fp, "%7.2f (%2.0f%%) usr",
+	       tv->elapsed.user,
+	       (total->user == 0 ? 0 : tv->elapsed.user / total->user) * 100);
+#endif /* HAVE_USER_TIME */
+
+#ifdef HAVE_SYS_TIME
+      /* Print system-mode time for this process.  */
+      fprintf (fp, "%7.2f (%2.0f%%) sys",
+	       tv->elapsed.sys,
+	       (total->sys == 0 ? 0 : tv->elapsed.sys / total->sys) * 100);
+#endif /* HAVE_SYS_TIME */
+
+#ifdef HAVE_WALL_TIME
+      /* Print wall clock time elapsed.  */
+      fprintf (fp, "%7.2f (%2.0f%%) wall",
+	       tv->elapsed.wall,
+	       (total->wall == 0 ? 0 : tv->elapsed.wall / total->wall) * 100);
+#endif /* HAVE_WALL_TIME */
+
+      putc ('\n', fp);
+    }
+
+  /* Print total time.  */
+  fputs (_(" TOTAL                 :"), fp);
+#ifdef HAVE_USER_TIME
+  fprintf (fp, "%7.2f          ", total->user);
+#endif
+#ifdef HAVE_SYS_TIME
+  fprintf (fp, "%7.2f          ", total->sys);
+#endif
+#ifdef HAVE_WALL_TIME
+  fprintf (fp, "%7.2f\n", total->wall);
+#endif
+
+#endif /* defined (HAVE_USER_TIME) || defined (HAVE_SYS_TIME)
+	  || defined (HAVE_WALL_TIME) */
+}
+
+/* Returns time (user + system) used so far by the compiler process,
+   in microseconds.  */
+
+long
+get_run_time ()
+{
+  struct timevar_time_def total_elapsed;
+  timevar_get (TV_TOTAL, &total_elapsed);
+  return total_elapsed.user + total_elapsed.sys;
+}
+
+/* Prints a message to stderr stating that time elapsed in STR is
+   TOTAL (given in microseconds).  */
+
+void
+print_time (str, total)
+     const char *str;
+     long total;
+{
+  long all_time = get_run_time ();
+  fprintf (stderr,
+	   _("time in %s: %ld.%06ld (%ld%%)\n"),
+	   str, total / 1000000, total % 1000000,
+ 	   all_time == 0 ? 0
+ 	   : (long) (((100.0 * (double) total) / (double) all_time) + .5));
+}