1 files changed, 65 insertions, 0 deletions
diff --git a/gcc/tree-ssa-sccvn.h b/gcc/tree-ssa-sccvn.h
new file mode 100644
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+++ b/gcc/tree-ssa-sccvn.h
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+/* Tree SCC value numbering
+   Copyright (C) 2007 Free Software Foundation, Inc.
+   Contributed by Daniel Berlin <dberlin@dberlin.org>
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, 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; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef TREE_SSA_SCCVN_H
+#define TREE_SSA_SCCVN_H
+
+/* TOP of the VN lattice.  */
+extern tree VN_TOP;
+
+typedef struct vn_ssa_aux
+{
+  /* SCC information.  */
+  unsigned int dfsnum;
+  bool visited;
+  unsigned int low;
+  bool on_sccstack;
+
+  /* Value number. This may be an SSA name or a constant.  */
+  tree valnum;
+  /* Representative expression, if not a direct constant. */
+  tree expr;
+  /* Whether the representative expression contains constants.  */
+  bool has_constants;
+  /* Whether the SSA_NAME has been value numbered already.  This is
+     only saying whether visit_use has been called on it at least
+     once.  It cannot be used to avoid visitation for SSA_NAME's
+     involved in non-singleton SCC's.  */
+  bool use_processed;
+} *vn_ssa_aux_t;
+
+/* Return the value numbering info for an SSA_NAME.  */
+extern vn_ssa_aux_t VN_INFO (tree);
+extern vn_ssa_aux_t VN_INFO_GET (tree);
+void run_scc_vn (void);
+void free_scc_vn (void);
+void switch_to_PRE_table (void);
+tree vn_binary_op_lookup (tree);
+void vn_binary_op_insert (tree, tree);
+tree vn_unary_op_lookup (tree);
+void vn_unary_op_insert (tree, tree);
+tree vn_reference_lookup (tree, VEC (tree, gc) *);
+void vn_reference_insert (tree, tree, VEC (tree, gc) *);
+VEC (tree, gc) *shared_vuses_from_stmt (tree);
+VEC (tree, gc) *copy_vuses_from_stmt (tree);
+				  
+
+#endif /* TREE_SSA_SCCVN_H  */