From 0a9d9b9ca6db84df665a902e59c8cdd875064c3f Mon Sep 17 00:00:00 2001
From: rakdver <rakdver@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu, 26 Jun 2003 07:52:10 +0000
Subject: 	* value-prof.c: New. 	* value-prof.h: New. 	* Makefile.in
 (value-prof.o): New. 	(LIBGCOV): Add _gcov_merge_single and
 _gcov_merge_delta 	(profile.o): Add value-prof.h and tree.h dependency. 
 * flags.h (flag_profile_values): Declare. 	* gcov-io.h (GCOV_COUNTERS,
 GCOV_COUNTER_NAMES, GCOV_MERGE_FUNCTIONS): 	Add new counters. 
 (GCOV_COUNTER_V_INTERVAL, GCOV_COUNTER_V_POW2, GCOV_COUNTER_V_SINGLE, 
 GCOV_COUNTER_V_DELTA): New counter sections. 	(__gcov_merge_single,
 __gcov_merge_delta): Declare. 	* flow.c (mark_used_regs): Set subregs_of_mode
 only when the 	structure is initialized. 	* libgcov.c
 (__gcov_merge_single, __gcov_merge_delta): New functions. 	* profile.c:
 Include value-prof.h and tree.h. 	(gen_interval_profiler,
 gen_pow2_profiler, gen_one_value_profiler, 	gen_const_delta_profiler,
 instrument_values): New static functions. 	(get_exec_counts): Fix
 comment. 	(branch_prob): Invoke instrument_values. 	* toplev.c
 (flag_profile_values): New flag. 	* doc/invoke.texi (-fprofile-values):
 Document.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@68519 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/libgcov.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)

(limited to 'gcc/libgcov.c')

diff --git a/gcc/libgcov.c b/gcc/libgcov.c
index ba54281e585..5396c395bf2 100644
--- a/gcc/libgcov.c
+++ b/gcc/libgcov.c
@@ -63,6 +63,16 @@ void __gcov_merge_add (gcov_type *counters  __attribute__ ((unused)),
 		       unsigned n_counters __attribute__ ((unused))) {}
 #endif
 
+#ifdef L_gcov_merge_single
+void __gcov_merge_single (gcov_type *counters  __attribute__ ((unused)),
+			  unsigned n_counters __attribute__ ((unused))) {}
+#endif
+
+#ifdef L_gcov_merge_delta
+void __gcov_merge_delta (gcov_type *counters  __attribute__ ((unused)),
+			 unsigned n_counters __attribute__ ((unused))) {}
+#endif
+
 #else
 
 #include <string.h>
@@ -466,4 +476,83 @@ __gcov_merge_add (gcov_type *counters, unsigned n_counters)
 }
 #endif /* L_gcov_merge_add */
 
+#ifdef L_gcov_merge_single
+/* The profile merging function for choosing the most common value.  It is given
+   an array COUNTERS of N_COUNTERS old counters and it reads the same number
+   of counters from the gcov file.  The counters are split into 3-tuples
+   where the members of the tuple have meanings:
+   -- the stored candidate on the most common value of the measured entity
+   -- counter
+   -- total number of evaluations of the value  */
+void
+__gcov_merge_single (gcov_type *counters, unsigned n_counters)
+{
+  unsigned i, n_measures;
+  gcov_type value, counter, all;
+
+  if (n_counters % 3)
+    abort ();
+
+  n_measures = n_counters / 3;
+  for (i = 0; i < n_measures; i++, counters += 3)
+    {
+      value = gcov_read_counter ();
+      counter = gcov_read_counter ();
+      all = gcov_read_counter ();
+
+      if (counters[0] == value)
+	counters[1] += counter;
+      else if (counter > counters[1])
+	{
+	  counters[0] = value;
+	  counters[1] = counter - counters[1];
+	}
+      else
+	counters[1] -= counter;
+      counters[2] += all;
+    }
+}
+#endif /* L_gcov_merge_single */
+
+#ifdef L_gcov_merge_delta
+/* The profile merging function for choosing the most common difference between
+   two consecutive evaluations of the value.  It is given an array COUNTERS of
+   N_COUNTERS old counters and it reads the same number of counters from the
+   gcov file.  The counters are split into 4-tuples where the members of the
+   tuple have meanings:
+   -- the last value of the measured entity
+   -- the stored candidate on the most common difference
+   -- counter
+   -- total number of evaluations of the value  */
+void
+__gcov_merge_delta (gcov_type *counters, unsigned n_counters)
+{
+  unsigned i, n_measures;
+  gcov_type last, value, counter, all;
+
+  if (n_counters % 4)
+    abort ();
+
+  n_measures = n_counters / 4;
+  for (i = 0; i < n_measures; i++, counters += 4)
+    {
+      last = gcov_read_counter ();
+      value = gcov_read_counter ();
+      counter = gcov_read_counter ();
+      all = gcov_read_counter ();
+
+      if (counters[1] == value)
+	counters[2] += counter;
+      else if (counter > counters[2])
+	{
+	  counters[1] = value;
+	  counters[2] = counter - counters[2];
+	}
+      else
+	counters[2] -= counter;
+      counters[3] += all;
+    }
+}
+#endif /* L_gcov_merge_delta */
+
 #endif /* inhibit_libc */
-- 
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