2 * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
6 * This file may be distributed and/or modified under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation and appearing in the file LICENSE.GPL included in the
9 * packaging of this file.
11 * Licensees holding valid libFirm Professional Edition licenses may use
12 * this file in accordance with the libFirm Commercial License.
13 * Agreement provided with the Software.
15 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
16 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * @brief Definitions for optimisation flags
23 * @author Michael Beck, Sebastian Hack
27 * We have 3 kinds of flags:
28 * I_FLAGS are INTERNAL flags: There is only a public set_opt_<flag> function
29 * E_FLAGS are EXTERNAL flags: Public get_opt_<flag> and set_opt_<flag> fucntions exists
30 * R_FLAGS are RUNNING flags: Use only internally in libfirm to indicate running states
33 /** Turn off all optimizations. */
34 I_FLAG(optimize , 0, ON)
36 /** Common subexpression eliminations: Hash the nodes. */
39 /** Don't use block predecessor for comparison.
40 * Default must be zero as code placement must
41 * be run right after a local optimize walk with
43 I_FLAG(global_cse , 2, OFF)
45 /** Evaluate operations. */
46 E_FLAG(constant_folding , 3, ON)
48 /** Algebraic simplifications. */
49 I_FLAG(algebraic_simplification , 4, ON)
51 /** Use Global Null Pointer Test elimination. */
52 I_FLAG(global_null_ptr_elimination , 5, ON)
54 /** Optimize cast nodes. */
55 E_FLAG(suppress_downcast_optimization , 7, OFF)
57 /** Automatically create Sync node during construction. */
58 I_FLAG(auto_create_sync , 10, OFF)
60 /** Enable Alias-analysis. */
61 I_FLAG(alias_analysis , 11, ON)
63 /** Closed world assumption. */
64 I_FLAG(closed_world , 12, OFF)
66 /* -------------------- RUNNING flags ------------------- */
68 /** This flag is set while the reassociation optimizations are running */