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145
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1 /* Support routines for dead store elimination.
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2 Copyright (C) 2019-2020 Free Software Foundation, Inc.
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 3, or (at your option)
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9 any later version.
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10
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11 GCC is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with GCC; see the file COPYING3. If not see
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18 <http://www.gnu.org/licenses/>. */
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19
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20 #ifndef GCC_TREE_SSA_DSE_H
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21 #define GCC_TREE_SSA_DSE_H
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22
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23 /* Return value from dse_classify_store */
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24 enum dse_store_status
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25 {
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26 DSE_STORE_LIVE,
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27 DSE_STORE_MAYBE_PARTIAL_DEAD,
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28 DSE_STORE_DEAD
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29 };
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30
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31 dse_store_status dse_classify_store (ao_ref *, gimple *, bool, sbitmap,
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32 bool * = NULL, tree = NULL);
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33
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34 void delete_dead_or_redundant_assignment (gimple_stmt_iterator *, const char *,
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35 bitmap = NULL);
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36
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37 #endif /* GCC_TREE_SSA_DSE_H */
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