gcc-7.1.0gcc-7.1.0

1 files changed, 59 insertions, 0 deletions

diff --git a/gcc/tree-vrp.h b/gcc/tree-vrp.h
new file mode 100644
index 0000000000..ef2c68a752
--- /dev/null
+++ b/gcc/tree-vrp.h
@@ -0,0 +1,59 @@
+/* Support routines for Value Range Propagation (VRP).
+   Copyright (C) 2016-2017 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 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/>.  */
+
+/* Type of value ranges.  See value_range_d In tree-vrp.c for a
+   description of these types.  */
+enum value_range_type { VR_UNDEFINED, VR_RANGE,
+			VR_ANTI_RANGE, VR_VARYING, VR_LAST };
+
+/* Range of values that can be associated with an SSA_NAME after VRP
+   has executed.  */
+struct GTY((for_user)) value_range
+{
+  /* Lattice value represented by this range.  */
+  enum value_range_type type;
+
+  /* Minimum and maximum values represented by this range.  These
+     values should be interpreted as follows:
+
+	- If TYPE is VR_UNDEFINED or VR_VARYING then MIN and MAX must
+	  be NULL.
+
+	- If TYPE == VR_RANGE then MIN holds the minimum value and
+	  MAX holds the maximum value of the range [MIN, MAX].
+
+	- If TYPE == ANTI_RANGE the variable is known to NOT
+	  take any values in the range [MIN, MAX].  */
+  tree min;
+  tree max;
+
+  /* Set of SSA names whose value ranges are equivalent to this one.
+     This set is only valid when TYPE is VR_RANGE or VR_ANTI_RANGE.  */
+  bitmap equiv;
+};
+
+extern void vrp_intersect_ranges (value_range *vr0, value_range *vr1);
+extern void vrp_meet (value_range *vr0, const value_range *vr1);
+extern void dump_value_range (FILE *, const value_range *);
+extern void extract_range_from_unary_expr (value_range *vr,
+					   enum tree_code code,
+					   tree type,
+					   value_range *vr0_,
+					   tree op0_type);
+