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Diffstat (limited to 'gcc-4.9/gcc/tree-phinodes.h')
-rw-r--r-- | gcc-4.9/gcc/tree-phinodes.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/tree-phinodes.h b/gcc-4.9/gcc/tree-phinodes.h new file mode 100644 index 000000000..1e5df8391 --- /dev/null +++ b/gcc-4.9/gcc/tree-phinodes.h @@ -0,0 +1,69 @@ +/* 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 */ |