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      1 /* Exported functions from alias.cc
      2    Copyright (C) 2004-2022 Free Software Foundation, Inc.
      3 
      4 This file is part of GCC.
      5 
      6 GCC is free software; you can redistribute it and/or modify it under
      7 the terms of the GNU General Public License as published by the Free
      8 Software Foundation; either version 3, or (at your option) any later
      9 version.
     10 
     11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
     12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
     13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
     14 for more details.
     15 
     16 You should have received a copy of the GNU General Public License
     17 along with GCC; see the file COPYING3.  If not see
     18 <http://www.gnu.org/licenses/>.  */
     19 
     20 #ifndef GCC_ALIAS_H
     21 #define GCC_ALIAS_H
     22 
     23 extern alias_set_type new_alias_set (void);
     24 extern alias_set_type get_alias_set (tree);
     25 extern alias_set_type get_deref_alias_set (tree);
     26 extern alias_set_type get_varargs_alias_set (void);
     27 extern alias_set_type get_frame_alias_set (void);
     28 extern tree component_uses_parent_alias_set_from (const_tree);
     29 extern bool ends_tbaa_access_path_p (const_tree);
     30 extern bool alias_set_subset_of (alias_set_type, alias_set_type);
     31 extern void record_alias_subset (alias_set_type, alias_set_type);
     32 extern void record_component_aliases (tree);
     33 extern int alias_sets_conflict_p (alias_set_type, alias_set_type);
     34 extern int alias_sets_must_conflict_p (alias_set_type, alias_set_type);
     35 extern int objects_must_conflict_p (tree, tree);
     36 extern int nonoverlapping_memrefs_p (const_rtx, const_rtx, bool);
     37 extern void dump_alias_stats_in_alias_c (FILE *s);
     38 tree reference_alias_ptr_type (tree);
     39 tree reference_alias_ptr_type_1 (tree *);
     40 bool alias_ptr_types_compatible_p (tree, tree);
     41 int compare_base_decls (tree, tree);
     42 bool refs_same_for_tbaa_p (tree, tree);
     43 bool mems_same_for_tbaa_p (rtx, rtx);
     44 
     45 /* This alias set can be used to force a memory to conflict with all
     46    other memories, creating a barrier across which no memory reference
     47    can move.  Note that there are other legacy ways to create such
     48    memory barriers, including an address of SCRATCH.  */
     49 #define ALIAS_SET_MEMORY_BARRIER	((alias_set_type) -1)
     50 
     51 #endif /* GCC_ALIAS_H */
     52