Initial checkin of GCC 4.9.0 from trunk (r208799).

Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba

1 files changed, 605 insertions, 0 deletions

diff --git a/gcc-4.9/gcc/timevar.c b/gcc-4.9/gcc/timevar.c
new file mode 100644
index 000000000..c111e983c
--- /dev/null
+++ b/gcc-4.9/gcc/timevar.c
@@ -0,0 +1,605 @@
+/* Timing variables for measuring compiler performance.
+   Copyright (C) 2000-2014 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 3, 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 COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "timevar.h"
+
+#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
+
+#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
+# if defined HAVE_DECL_TIMES && !HAVE_DECL_TIMES
+  extern clock_t times (struct tms *);
+# endif
+# define USE_TIMES
+# define HAVE_USER_TIME
+# define HAVE_SYS_TIME
+# define HAVE_WALL_TIME
+#else
+#ifdef HAVE_GETRUSAGE
+# if defined HAVE_DECL_GETRUSAGE && !HAVE_DECL_GETRUSAGE
+  extern int getrusage (int, struct rusage *);
+# endif
+# define USE_GETRUSAGE
+# define HAVE_USER_TIME
+# define HAVE_SYS_TIME
+#else
+#ifdef HAVE_CLOCK
+# if defined HAVE_DECL_CLOCK && !HAVE_DECL_CLOCK
+  extern clock_t clock (void);
+# endif
+# 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 double ticks_to_msec;
+#define TICKS_TO_MSEC (1 / (double)TICKS_PER_SECOND)
+#endif
+
+#ifdef USE_CLOCK
+static double clocks_to_msec;
+#define CLOCKS_TO_MSEC (1 / (double)CLOCKS_PER_SEC)
+#endif
+
+/* True if timevars should be used.  In GCC, this happens with
+   the -ftime-report flag.  */
+
+bool timevar_enable;
+
+/* Total amount of memory allocated by garbage collector.  */
+
+size_t timevar_ggc_mem_total;
+
+/* The amount of memory that will cause us to report the timevar even
+   if the time spent is not significant.  */
+
+#define GGC_MEM_BOUND (1 << 20)
+
+/* See timevar.h for an explanation of timing variables.  */
+
+/* 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;
+
+  /* Nonzero if this timing variable is running as a standalone
+     timer.  */
+  unsigned standalone : 1;
+
+  /* Nonzero 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 (struct timevar_time_def *);
+static void timevar_accumulate (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
+   HAVE_WALL_TIME macros.  */
+
+static void
+get_time (struct timevar_time_def *now)
+{
+  now->user = 0;
+  now->sys  = 0;
+  now->wall = 0;
+  now->ggc_mem = timevar_ggc_mem_total;
+
+  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 (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;
+  timer->ggc_mem += stop_time->ggc_mem - start_time->ggc_mem;
+}
+
+/* Initialize timing variables.  */
+
+void
+timevar_init (void)
+{
+  timevar_enable = true;
+
+  /* Zero all elapsed times.  */
+  memset (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_1 (timevar_id_t timevar)
+{
+  struct timevar_def *tv = &timevars[timevar];
+  struct timevar_stack_def *context;
+  struct timevar_time_def now;
+
+  /* Mark this timing variable as used.  */
+  tv->used = 1;
+
+  /* Can't push a standalone timer.  */
+  gcc_assert (!tv->standalone);
+
+  /* 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 = XNEW (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_1 (timevar_id_t timevar)
+{
+  struct timevar_time_def now;
+  struct timevar_stack_def *popped = stack;
+
+  gcc_assert (&timevars[timevar] == stack->timevar);
+
+  /* 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_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.  */
+  gcc_assert (!tv->standalone);
+  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_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.  */
+  gcc_assert (tv->standalone);
+  tv->standalone = 0; /* Enable a restart.  */
+
+  get_time (&now);
+  timevar_accumulate (&tv->elapsed, &tv->start_time, &now);
+}
+
+
+/* Conditionally start timing TIMEVAR independently of the timing stack.
+   If the timer is already running, leave it running and return true.
+   Otherwise, start the timer and return false.
+   Elapsed time until the corresponding timevar_cond_stop
+   is called for the same timing variable is attributed to TIMEVAR.  */
+
+bool
+timevar_cond_start (timevar_id_t timevar)
+{
+  struct timevar_def *tv = &timevars[timevar];
+
+  if (!timevar_enable)
+    return false;
+
+  /* Mark this timing variable as used.  */
+  tv->used = 1;
+
+  if (tv->standalone)
+    return true;  /* The timevar is already running.  */
+
+  /* Don't allow the same timing variable
+     to be unconditionally started more than once.  */
+  tv->standalone = 1;
+
+  get_time (&tv->start_time);
+  return false;  /* The timevar was not already running.  */
+}
+
+/* Conditionally stop timing TIMEVAR.  The RUNNING parameter must come
+   from the return value of a dynamically matching timevar_cond_start.
+   If the timer had already been RUNNING, do nothing.  Otherwise, time
+   elapsed since timevar_cond_start was called is attributed to it.  */
+
+void
+timevar_cond_stop (timevar_id_t timevar, bool running)
+{
+  struct timevar_def *tv;
+  struct timevar_time_def now;
+
+  if (!timevar_enable || running)
+    return;
+
+  tv = &timevars[timevar];
+
+  /* TIMEVAR must have been started via timevar_cond_start.  */
+  gcc_assert (tv->standalone);
+  tv->standalone = 0; /* Enable a restart.  */
+
+  get_time (&now);
+  timevar_accumulate (&tv->elapsed, &tv->start_time, &now);
+}
+
+
+/* Validate that phase times are consistent.  */
+
+static void
+validate_phases (FILE *fp)
+{
+  unsigned int /* timevar_id_t */ id;
+  struct timevar_time_def *total = &timevars[TV_TOTAL].elapsed;
+  double phase_user = 0.0;
+  double phase_sys = 0.0;
+  double phase_wall = 0.0;
+  size_t phase_ggc_mem = 0;
+  static char phase_prefix[] = "phase ";
+  const double tolerance = 1.000001;  /* One part in a million.  */
+
+  for (id = 0; id < (unsigned int) TIMEVAR_LAST; ++id)
+    {
+      struct timevar_def *tv = &timevars[(timevar_id_t) id];
+
+      /* Don't evaluate timing variables that were never used.  */
+      if (!tv->used)
+	continue;
+
+      if (strncmp (tv->name, phase_prefix, sizeof phase_prefix - 1) == 0)
+	{
+	  phase_user += tv->elapsed.user;
+	  phase_sys += tv->elapsed.sys;
+	  phase_wall += tv->elapsed.wall;
+	  phase_ggc_mem += tv->elapsed.ggc_mem;
+	}
+    }
+
+  if (phase_user > total->user * tolerance
+      || phase_sys > total->sys * tolerance
+      || phase_wall > total->wall * tolerance
+      || phase_ggc_mem > total->ggc_mem * tolerance)
+    {
+
+      fprintf (fp, "Timing error: total of phase timers exceeds total time.\n");
+      if (phase_user > total->user)
+	fprintf (fp, "user    %24.18e > %24.18e\n", phase_user, total->user);
+      if (phase_sys > total->sys)
+	fprintf (fp, "sys     %24.18e > %24.18e\n", phase_sys, total->sys);
+      if (phase_wall > total->wall)
+	fprintf (fp, "wall    %24.18e > %24.18e\n", phase_wall, total->wall);
+      if (phase_ggc_mem > total->ggc_mem)
+	fprintf (fp, "ggc_mem %24lu > %24lu\n", (unsigned long)phase_ggc_mem,
+		 (unsigned long)total->ggc_mem);
+      gcc_unreachable ();
+    }
+}
+
+
+/* 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 (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 double 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
+	  && tv->elapsed.ggc_mem < GGC_MEM_BOUND)
+	continue;
+
+      /* The timing variable name.  */
+      fprintf (fp, " %-24s:", 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 */
+
+      /* Print the amount of ggc memory allocated.  */
+      fprintf (fp, "%8u kB (%2.0f%%) ggc",
+	       (unsigned) (tv->elapsed.ggc_mem >> 10),
+	       (total->ggc_mem == 0
+		? 0
+		: (float) tv->elapsed.ggc_mem / total->ggc_mem) * 100);
+
+      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           ", total->wall);
+#endif
+  fprintf (fp, "%8u kB\n", (unsigned) (total->ggc_mem >> 10));
+
+#ifdef ENABLE_CHECKING
+  fprintf (fp, "Extra diagnostic checks enabled; compiler may run slowly.\n");
+  fprintf (fp, "Configure with --enable-checking=release to disable checks.\n");
+#endif
+#ifndef ENABLE_ASSERT_CHECKING
+  fprintf (fp, "Internal checks disabled; compiler is not suited for release.\n");
+  fprintf (fp, "Configure with --enable-checking=release to enable checks.\n");
+#endif
+
+#endif /* defined (HAVE_USER_TIME) || defined (HAVE_SYS_TIME)
+	  || defined (HAVE_WALL_TIME) */
+
+  validate_phases (fp);
+}
+
+/* Prints a message to stderr stating that time elapsed in STR is
+   TOTAL (given in microseconds).  */
+
+void
+print_time (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));
+}