vr-values.h: New file with vr_values class.

	* vr-values.h: New file with vr_values class.
	* tree-vrp.c: Include vr-values.h
	(vrp_value_range_pool, vrp_equiv_obstack, num_vr_values): Move static
	data objects into the vr_values class.
	(vr_value, values_propagated, vr_phi_edge_counts): Likewise.
	(get_value_range): Make it a member function within vr_values class.
	(set_defs_to_varying, update_value_range, add_equivalence): Likewise.
	(vrp_stmt_computes_nonzero_p, op_with_boolean_value_range_p): Likewise.
	(op_with_constant_singleton_value_range): Likewise.
	(extract_range_for_var_from_comparison_expr): Likewise.
	(extract_range_from_assert, extract_range_from_ssa_name): Likewise.
	(extract_range_from_binary_expr): Likewise.
	(extract_range_from_unary_expr): Likewise.
	(extract_range_from_cond_expr, extrat_range_from_comparison): Likewise.
	(check_for_binary_op_overflow, extract_range_basic): Likewise.
	(extract_range_from_assignment, adjust_range_with_scev): Likewise.
	(dump_all_value_ranges, get_vr_for_comparison): Likewise.
	(compare_name_with_value, compare_names): Likewise.
	(vrp_evaluate_conditional_warnv_with_ops_using_ranges): Likewise.
	(vrp_evaluate_conditional_warnv_with_ops): Likewise.  Remove prototype.
	(vrp_evaluate_conditional, vrp_visit_cond_stmt): Likewise.
	(vrp_visit_switch_stmt, extract_range_from_stmt): Likewise.
	(extract_range_from_phi_node): Likewise.
	(simplify_truth_ops_using_ranges): Likewise.
	(simplify_div_or_mod_using_ranges): Likewise.
	(simplify_min_or_max_using_ranges, simplify_abs_using_ranges): Likewise.
	(simplify_bit_ops_using_ranges, simplify_cond_using_ranges_1): Likewise.
	(simplify_cond_using_ranges_2, simplify_switch_using_ranges): Likewise.
	(simplify_float_conversion_using_ranges): Likewise.
	(simplify_internal_call_using_ranges): Likewise.
	(two_valued_val_range_p, simplify_stmt_using_ranges): Likewise.
	(vrp_visit_assignment_or_call): Likewise.  Smuggle class instance
	poitner via x_vr_values for calls into gimple folder.
	(vrp_initialize_lattice): Make this the vr_values ctor.
	(vrp_free_lattice): Make this the vr_values dtor.
	(set_vr_value): New function.
	(class vrp_prop): Add vr_values data member.  Add various member
	functions as well as member functions that delegate to vr_values.
	(check_array_ref): Make a member function within vrp_prop class.
	(search_for_addr_array, vrp_initialize): Likewise.
	(vrp_finalize): Likewise.  Revamp to avoid direct access to
	vr_value, values_propagated, etc.
	(check_array_bounds): Extract vrp_prop class instance pointer from
	walk info structure.  Use it to call member functions.
	(check_all_array_refs): Make a member function within vrp_prop class.
	Smuggle class instance pointer via walk info structure.
	(x_vr_values): New local static.
	(vrp_valueize): Use x_vr_values to get class instance.
	(vr_valueize_1): Likewise.
	(class vrp_folder): Add vr_values data member.  Add various member
	functions as well as member functions that delegate to vr_values.
	(fold_predicate_in): Make a mber fucntion within vrp_folder class.
	(simplify_stmt_for_jump_threading): Extract smuggled vr_values
	class instance from vr_values.  Use it to call member functions.
	(vrp_dom_walker): Add vr_values data member.
	(vrp_dom_walker::after_dom_children): Smuggle vr_values class
	instance via x_vr_values.
	(identify_jump_threads): Accept vr_values as argument.  Store
	it into the walker structure.
	(evrp_dom_walker): Add vr_values class data member.  Add various
	delegators.
	(evrp_dom_walker::try_find_new_range): Use vr_values data
	member to access the memory allocator.
	(evrp_dom_walker::before_dom_children): Store vr_values class
	instance into the vrp_folder class.
	(evrp_dom_walker::push_value_range): Rework to avoid direct
	access to num_vr_values and vr_value.
	(evrp_dom_walker::pop_value_range): Likewise.
	(execute_early_vrp): Remove call to vrp_initialize_lattice.
	Use vr_values to get to dump_all_value_ranges member function.
	Remove call to vrp_free_lattice.  Call vrp_initialize, vrp_finalize,
	and simplify_cond_using_ranges_2 via vrp_prop class instance.
	Pass vr_values class instance down to identify_jump_threads.
	Remove call to vrp_free_lattice.
	(debug_all_value_ranges): Remove.

From-SVN: r254613

gcc/ChangeLog

 2017-11-09  Jeff Law  <law@redhat.com>
 
+	* vr-values.h: New file with vr_values class.
+	* tree-vrp.c: Include vr-values.h
+	(vrp_value_range_pool, vrp_equiv_obstack, num_vr_values): Move static
+	data objects into the vr_values class.
+	(vr_value, values_propagated, vr_phi_edge_counts): Likewise.
+	(get_value_range): Make it a member function within vr_values class.
+	(set_defs_to_varying, update_value_range, add_equivalence): Likewise.
+	(vrp_stmt_computes_nonzero_p, op_with_boolean_value_range_p): Likewise.
+	(op_with_constant_singleton_value_range): Likewise.
+	(extract_range_for_var_from_comparison_expr): Likewise.
+	(extract_range_from_assert, extract_range_from_ssa_name): Likewise.
+	(extract_range_from_binary_expr): Likewise.
+	(extract_range_from_unary_expr): Likewise.
+	(extract_range_from_cond_expr, extrat_range_from_comparison): Likewise.
+	(check_for_binary_op_overflow, extract_range_basic): Likewise.
+	(extract_range_from_assignment, adjust_range_with_scev): Likewise.
+	(dump_all_value_ranges, get_vr_for_comparison): Likewise.
+	(compare_name_with_value, compare_names): Likewise.
+	(vrp_evaluate_conditional_warnv_with_ops_using_ranges): Likewise.
+	(vrp_evaluate_conditional_warnv_with_ops): Likewise.  Remove prototype.
+	(vrp_evaluate_conditional, vrp_visit_cond_stmt): Likewise.
+	(vrp_visit_switch_stmt, extract_range_from_stmt): Likewise.
+	(extract_range_from_phi_node): Likewise.
+	(simplify_truth_ops_using_ranges): Likewise.
+	(simplify_div_or_mod_using_ranges): Likewise.
+	(simplify_min_or_max_using_ranges, simplify_abs_using_ranges): Likewise.
+	(simplify_bit_ops_using_ranges, simplify_cond_using_ranges_1): Likewise.
+	(simplify_cond_using_ranges_2, simplify_switch_using_ranges): Likewise.
+	(simplify_float_conversion_using_ranges): Likewise.
+	(simplify_internal_call_using_ranges): Likewise.
+	(two_valued_val_range_p, simplify_stmt_using_ranges): Likewise.
+	(vrp_visit_assignment_or_call): Likewise.  Smuggle class instance
+	poitner via x_vr_values for calls into gimple folder.
+	(vrp_initialize_lattice): Make this the vr_values ctor.
+	(vrp_free_lattice): Make this the vr_values dtor.
+	(set_vr_value): New function.
+	(class vrp_prop): Add vr_values data member.  Add various member
+	functions as well as member functions that delegate to vr_values.
+	(check_array_ref): Make a member function within vrp_prop class.
+	(search_for_addr_array, vrp_initialize): Likewise.
+	(vrp_finalize): Likewise.  Revamp to avoid direct access to
+	vr_value, values_propagated, etc.
+	(check_array_bounds): Extract vrp_prop class instance pointer from
+	walk info structure.  Use it to call member functions.
+	(check_all_array_refs): Make a member function within vrp_prop class.
+	Smuggle class instance pointer via walk info structure.
+	(x_vr_values): New local static.
+	(vrp_valueize): Use x_vr_values to get class instance.
+	(vr_valueize_1): Likewise.
+	(class vrp_folder): Add vr_values data member.  Add various member
+	functions as well as member functions that delegate to vr_values.
+	(fold_predicate_in): Make a mber fucntion within vrp_folder class.
+	(simplify_stmt_for_jump_threading): Extract smuggled vr_values
+	class instance from vr_values.  Use it to call member functions.
+	(vrp_dom_walker): Add vr_values data member.
+	(vrp_dom_walker::after_dom_children): Smuggle vr_values class
+	instance via x_vr_values.
+	(identify_jump_threads): Accept vr_values as argument.  Store
+	it into the walker structure.
+	(evrp_dom_walker): Add vr_values class data member.  Add various
+	delegators.
+	(evrp_dom_walker::try_find_new_range): Use vr_values data
+	member to access the memory allocator.
+	(evrp_dom_walker::before_dom_children): Store vr_values class
+	instance into the vrp_folder class.
+	(evrp_dom_walker::push_value_range): Rework to avoid direct
+	access to num_vr_values and vr_value.
+	(evrp_dom_walker::pop_value_range): Likewise.
+	(execute_early_vrp): Remove call to vrp_initialize_lattice.
+	Use vr_values to get to dump_all_value_ranges member function.
+	Remove call to vrp_free_lattice.  Call vrp_initialize, vrp_finalize,
+	and simplify_cond_using_ranges_2 via vrp_prop class instance.
+	Pass vr_values class instance down to identify_jump_threads.  
+	Remove call to vrp_free_lattice.
+	(debug_all_value_ranges): Remove.
+
 	* tree-vrp.c (vrp_prop): Move class to earlier point in the file.
 	(vrp_folder): Likewise.
 

gcc/vr-values.h

+/* 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/>.  */
+
+#ifndef GCC_VR_VALUES_H
+#define GCC_VR_VALUES_H
+
+/* The VR_VALUES class holds the current view of range information
+   for all the SSA_NAMEs in the IL.
+
+   It can be used to hold context sensitive range information during
+   a dominator walk or it may be used to hold range information in the
+   standard VRP pass as ranges are propagated through the lattice to a
+   steady state.
+
+   This information is independent of the range information that gets
+   attached to SSA_NAMEs.  A pass such as VRP may choose to transfer
+   the global information it produces into global range information that
+   gets attached to an SSA_NAME.  It's unclear how useful that global
+   information will be in a world where we can compute context sensitive
+   range information fast or perform on-demand queries.  */
+class vr_values
+{
+ public:
+  vr_values (void);
+  ~vr_values (void);
+
+  /* Value range array.  After propagation, VR_VALUE[I] holds the range
+     of values that SSA name N_I may take.  */
+  unsigned int num_vr_values;
+  value_range **vr_value;
+  bool values_propagated;
+
+  /* For a PHI node which sets SSA name N_I, VR_COUNTS[I] holds the
+     number of executable edges we saw the last time we visited the
+     node.  */
+  int *vr_phi_edge_counts;
+
+  /* Allocation pools for tree-vrp allocations.  */
+  object_allocator<value_range> vrp_value_range_pool;
+  bitmap_obstack vrp_equiv_obstack;
+
+  value_range *get_value_range (const_tree);
+  void set_vr_value (tree, value_range *);
+
+  void set_defs_to_varying (gimple *);
+  bool update_value_range (const_tree, value_range *);
+  void add_equivalence (bitmap *, const_tree);
+  bool vrp_stmt_computes_nonzero (gimple *);
+  tree op_with_constant_singleton_value_range (tree);
+  bool op_with_boolean_value_range_p (tree);
+  bool check_for_binary_op_overflow (enum tree_code, tree, tree, tree, bool *);
+  void adjust_range_with_scev (value_range *, struct loop *, gimple *, tree);
+  value_range get_vr_for_comparison (int);
+  tree compare_name_with_value (enum tree_code, tree, tree, bool *, bool);
+  tree compare_names (enum tree_code, tree, tree, bool *);
+  bool two_valued_val_range_p (tree, tree *, tree *);
+
+  tree vrp_evaluate_conditional_warnv_with_ops_using_ranges (enum tree_code,
+							     tree, tree,
+							     bool *);
+  tree vrp_evaluate_conditional_warnv_with_ops (enum tree_code,
+						tree, tree, bool,
+						bool *, bool *);
+  tree vrp_evaluate_conditional (tree_code, tree, tree, gimple *);
+
+
+  void dump_all_value_ranges (FILE *);
+
+  void extract_range_for_var_from_comparison_expr (tree, enum tree_code,
+						   tree, tree, value_range *);
+  void extract_range_from_assert (value_range *, tree);
+  void extract_range_from_ssa_name (value_range *, tree);
+  void extract_range_from_binary_expr (value_range *, enum tree_code,
+				       tree, tree, tree);
+  void extract_range_from_unary_expr (value_range *, enum tree_code,
+				      tree, tree);
+  void extract_range_from_phi_node (gphi *, value_range *);
+  void extract_range_from_cond_expr (value_range *, gassign *);
+  void extract_range_basic (value_range *, gimple *);
+  void extract_range_from_assignment (value_range *, gassign *);
+  void extract_range_from_stmt (gimple *, edge *, tree *, value_range *);
+  void extract_range_from_comparison (value_range *, enum tree_code,
+				      tree, tree, tree);
+
+  void vrp_visit_assignment_or_call (gimple*, tree *, value_range *);
+  void vrp_visit_switch_stmt (gswitch *, edge *);
+  void vrp_visit_cond_stmt (gcond *, edge *);
+
+  bool simplify_truth_ops_using_ranges (gimple_stmt_iterator *, gimple *);
+  bool simplify_div_or_mod_using_ranges (gimple_stmt_iterator *, gimple *);
+  bool simplify_abs_using_ranges (gimple_stmt_iterator *, gimple *);
+  bool simplify_bit_ops_using_ranges (gimple_stmt_iterator *, gimple *);
+  bool simplify_min_or_max_using_ranges (gimple_stmt_iterator *, gimple *);
+  bool simplify_cond_using_ranges_1 (gcond *);
+  void simplify_cond_using_ranges_2 (gcond *);
+  bool simplify_switch_using_ranges (gswitch *);
+  bool simplify_float_conversion_using_ranges (gimple_stmt_iterator *,
+					       gimple *);
+  bool simplify_internal_call_using_ranges (gimple_stmt_iterator *, gimple *);
+  bool simplify_stmt_using_ranges (gimple_stmt_iterator *);
+};
+
+#endif /* GCC_VR_VALUES_H */