3 * File name: ir/ir/irflag.c
4 * Purpose: Flags to control optimizations.
5 * Author: Christian Schaefer, Goetz Lindenmaier
9 * Copyright: (c) 1999-2003 Universität Karlsruhe
10 * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
17 #include "firm_common.h"
20 /* DISABLE - don't do this optimization
21 ENABLE - lets see, if there is a better graph */
25 optimization_state_t libFIRM_opt =
26 ENABLE(OPT_OPTIMIZED) |
28 DISABLE(OPT_GLOBAL_CSE) |
29 ENABLE(OPT_CONSTANT_FOLDING) |
30 ENABLE(OPT_UNREACHABLE_CODE) |
31 ENABLE(OPT_CONTROL_FLOW_STRAIGHTENING) |
32 ENABLE(OPT_CONTROL_FLOW_WEAK_SIMPLIFICATION) |
33 ENABLE(OPT_CONTROL_FLOW_STRONG_SIMPLIFICATION) |
34 ENABLE(OPT_CRITICAL_EDGES) |
35 ENABLE(OPT_DEAD_NODE_ELIMINATION) |
36 ENABLE(OPT_REASSOCIATION) |
38 ENABLE(OPT_DYN_METH_DISPATCH) |
39 ENABLE(OPT_NORMALIZE);
41 /* set the flags with set_flagname, get the flag with get_flagname */
42 void set_opt_cse (int value)
45 libFIRM_opt |= OPT_CSE;
47 libFIRM_opt &= ~OPT_CSE;
50 void set_opt_global_cse(int value)
53 libFIRM_opt |= OPT_GLOBAL_CSE;
55 libFIRM_opt &= ~OPT_GLOBAL_CSE;
59 set_opt_constant_folding(int value)
62 libFIRM_opt |= OPT_CONSTANT_FOLDING;
64 libFIRM_opt &= ~OPT_CONSTANT_FOLDING;
68 set_opt_unreachable_code(int value)
71 libFIRM_opt |= OPT_UNREACHABLE_CODE;
73 libFIRM_opt &= ~OPT_UNREACHABLE_CODE;
76 void set_opt_control_flow(int value)
78 set_opt_control_flow_straightening(value);
79 set_opt_control_flow_weak_simplification(value);
80 set_opt_control_flow_strong_simplification(value);
81 set_opt_critical_edges(value);
84 /* Performs Straightening */
85 void set_opt_control_flow_straightening(int value)
88 libFIRM_opt |= OPT_CONTROL_FLOW_STRAIGHTENING;
90 libFIRM_opt &= ~OPT_CONTROL_FLOW_STRAIGHTENING;
93 /* Performs if simplifications in local optimizations. */
94 void set_opt_control_flow_weak_simplification(int value)
97 libFIRM_opt |= OPT_CONTROL_FLOW_WEAK_SIMPLIFICATION;
99 libFIRM_opt &= ~OPT_CONTROL_FLOW_WEAK_SIMPLIFICATION;
102 /* Performs strong if and loop simplification (in optimize_cf). */
103 void set_opt_control_flow_strong_simplification(int value)
106 libFIRM_opt |= OPT_CONTROL_FLOW_STRONG_SIMPLIFICATION;
108 libFIRM_opt &= ~OPT_CONTROL_FLOW_STRONG_SIMPLIFICATION;
111 void set_opt_critical_edges(int value)
114 libFIRM_opt |= OPT_CRITICAL_EDGES;
116 libFIRM_opt &= ~OPT_CRITICAL_EDGES;
119 void set_opt_reassociation(int value)
122 libFIRM_opt |= OPT_REASSOCIATION;
124 libFIRM_opt &= ~OPT_REASSOCIATION;
127 void set_opt_dead_node_elimination(int value)
130 libFIRM_opt |= OPT_DEAD_NODE_ELIMINATION;
132 libFIRM_opt &= ~OPT_DEAD_NODE_ELIMINATION;
135 void set_optimize(int value)
138 libFIRM_opt |= OPT_OPTIMIZED;
140 libFIRM_opt &= ~OPT_OPTIMIZED;
143 int get_optimize(void)
145 return get_opt_optimize();
148 void set_opt_inline(int value)
151 libFIRM_opt |= OPT_INLINE;
153 libFIRM_opt &= ~OPT_INLINE;
156 /** Enable/Disable optimization of dynamic method dispatch
158 * This flag enables/disables the optimization of dynamic method dispatch.
159 * If the flag is turned on Sel nodes can be replaced by Const nodes representing
160 * the address of a function.
162 void set_opt_dyn_meth_dispatch (int value)
165 libFIRM_opt |= OPT_DYN_METH_DISPATCH;
167 libFIRM_opt &= ~OPT_DYN_METH_DISPATCH;
170 void set_opt_normalize(int value)
173 libFIRM_opt |= OPT_NORMALIZE;
175 libFIRM_opt &= ~OPT_NORMALIZE;
178 /* Save the current optimization state. */
179 void save_optimization_state(optimization_state_t *state)
181 *state = libFIRM_opt;
184 /* Restore the current optimization state. */
185 void restore_optimization_state(const optimization_state_t *state)
187 libFIRM_opt = *state;