| /* Header file for PHI node routines |
| Copyright (C) 2013-2014 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_TREE_PHINODES_H |
| #define GCC_TREE_PHINODES_H |
| |
| extern void phinodes_print_statistics (void); |
| extern void release_phi_node (gimple); |
| extern void reserve_phi_args_for_new_edge (basic_block); |
| extern void add_phi_node_to_bb (gimple phi, basic_block bb); |
| extern gimple create_phi_node (tree, basic_block); |
| extern void add_phi_arg (gimple, tree, edge, source_location); |
| extern void remove_phi_args (edge); |
| extern void remove_phi_node (gimple_stmt_iterator *, bool); |
| extern void remove_phi_nodes (basic_block); |
| extern tree degenerate_phi_result (gimple); |
| extern void set_phi_nodes (basic_block, gimple_seq); |
| |
| static inline use_operand_p |
| gimple_phi_arg_imm_use_ptr (gimple gs, int i) |
| { |
| return &gimple_phi_arg (gs, i)->imm_use; |
| } |
| |
| /* Return the phi argument which contains the specified use. */ |
| |
| static inline int |
| phi_arg_index_from_use (use_operand_p use) |
| { |
| struct phi_arg_d *element, *root; |
| size_t index; |
| gimple phi; |
| |
| /* Since the use is the first thing in a PHI argument element, we can |
| calculate its index based on casting it to an argument, and performing |
| pointer arithmetic. */ |
| |
| phi = USE_STMT (use); |
| |
| element = (struct phi_arg_d *)use; |
| root = gimple_phi_arg (phi, 0); |
| index = element - root; |
| |
| /* Make sure the calculation doesn't have any leftover bytes. If it does, |
| then imm_use is likely not the first element in phi_arg_d. */ |
| gcc_checking_assert ((((char *)element - (char *)root) |
| % sizeof (struct phi_arg_d)) == 0 |
| && index < gimple_phi_capacity (phi)); |
| |
| return index; |
| } |
| |
| #endif /* GCC_TREE_PHINODES_H */ |
