* value-prof.c: New.

	* value-prof.h: New.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@68521 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 59 insertions, 0 deletions

diff --git a/gcc/value-prof.h b/gcc/value-prof.h
new file mode 100644
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+/* Definitions for transformations based on profile information for values.
+   Copyright (C) 2003 Free Software Foundation, Inc.
+
+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.  */
+
+/* Supported histogram types.  */
+enum hist_type
+{
+  HIST_TYPE_INTERVAL,	/* Measures histogram of values inside a specified
+			   interval.  */
+  HIST_TYPE_POW2,	/* Histogram of power of 2 values.  */
+  HIST_TYPE_SINGLE_VALUE, /* Tries to identify the value that is (almost)
+			   always constant.  */
+  HIST_TYPE_CONST_DELTA	/* Tries to identify the (almost) always constant
+			   difference between two evaluations of a value.  */
+};
+
+/* The value to measure.  */
+struct histogram_value
+{
+  rtx value;		/* The value to profile.  */
+  enum machine_mode mode; /* And its mode.  */
+  rtx seq;		/* Insns requiered to count the profiled value.  */
+  rtx insn;		/* Insn before that to measure.  */
+  enum hist_type type;	/* Type of information to measure.  */
+  unsigned n_counters;	/* Number of requiered counters.  */
+  union
+    {
+      struct
+	{
+	  int int_start;	/* First value in interval.  */
+	  int steps;		/* Number of values in it.  */
+	  int may_be_less;	/* May the value be below?  */
+	  int may_be_more;	/* Or above.  */
+	} intvl;	/* Interval histogram data.  */
+      struct
+	{
+	  int may_be_other;	/* If the value may be non-positive or not 2^k.  */
+	} pow2;		/* Power of 2 histogram data.  */
+    } hdata;		/* Profiled information specific data.  */
+};
+
+extern void find_values_to_profile (unsigned *, struct histogram_value **);
+extern void free_profiled_values (unsigned, struct histogram_value *);