69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
/* Header file for PHI node routines
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Copyright (C) 2013-2017 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_TREE_PHINODES_H
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#define GCC_TREE_PHINODES_H
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extern void phinodes_print_statistics (void);
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extern void reserve_phi_args_for_new_edge (basic_block);
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extern void add_phi_node_to_bb (gphi *phi, basic_block bb);
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extern gphi *create_phi_node (tree, basic_block);
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extern void add_phi_arg (gphi *, tree, edge, source_location);
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extern void remove_phi_args (edge);
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extern void remove_phi_node (gimple_stmt_iterator *, bool);
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extern void remove_phi_nodes (basic_block);
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extern tree degenerate_phi_result (gphi *);
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extern void set_phi_nodes (basic_block, gimple_seq);
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static inline use_operand_p
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gimple_phi_arg_imm_use_ptr (gimple *gs, int i)
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{
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return &gimple_phi_arg (gs, i)->imm_use;
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}
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/* Return the phi argument which contains the specified use. */
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static inline int
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phi_arg_index_from_use (use_operand_p use)
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{
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struct phi_arg_d *element, *root;
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size_t index;
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gimple *phi;
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/* Since the use is the first thing in a PHI argument element, we can
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calculate its index based on casting it to an argument, and performing
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pointer arithmetic. */
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phi = USE_STMT (use);
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element = (struct phi_arg_d *)use;
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root = gimple_phi_arg (phi, 0);
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index = element - root;
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/* Make sure the calculation doesn't have any leftover bytes. If it does,
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then imm_use is likely not the first element in phi_arg_d. */
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gcc_checking_assert ((((char *)element - (char *)root)
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% sizeof (struct phi_arg_d)) == 0
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&& index < gimple_phi_capacity (phi));
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return index;
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}
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#endif /* GCC_TREE_PHINODES_H */
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