3 * File name: ir/ir/irhooks.h
4 * Purpose: Generic hooks for various libFirm functions.
8 * Copyright: (C) 1998-2005 Universität Karlsruhe
9 * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
15 * Generic hooks for various libFirm functions.
17 * @author Michael Beck
22 #include "firm_config.h"
28 * options for the hook_merge_nodes hook
31 HOOK_OPT_DEAD_BLOCK, /**< a block was removed because it's dead */
32 HOOK_OPT_STG, /**< straightening optimization */
33 HOOK_OPT_IFSIM, /**< if simplification */
34 HOOK_OPT_CONST_EVAL, /**< constant evaluation */
35 HOOK_OPT_ALGSIM, /**< algebraic simplification */
36 HOOK_OPT_PHI, /**< Phi optmization */
37 HOOK_OPT_WAW, /**< Write-After-Write optimization */
38 HOOK_OPT_WAR, /**< Write-After-Read optimization */
39 HOOK_OPT_RAW, /**< Read-After-Write optimization */
40 HOOK_OPT_RAR, /**< Read-After-Read optimization */
41 HOOK_OPT_RC, /**< Read-a-Const optimization */
42 HOOK_OPT_TUPLE, /**< Tuple optimization */
43 HOOK_OPT_ID, /**< ID optimization */
44 HOOK_OPT_CSE, /**< common subexpression elimination */
45 HOOK_OPT_STRENGTH_RED,/**< strength reduction */
46 HOOK_OPT_ARCH_DEP, /**< architecture dependent optimization */
47 HOOK_OPT_REASSOC, /**< reassociation */
48 HOOK_OPT_POLY_CALL, /**< polymorphic call optimization */
49 HOOK_OPT_IF_CONV, /**< an if conversion was tried */
50 HOOK_OPT_FUNC_CALL, /**< a real function call was removed */
51 HOOK_OPT_CONFIRM, /**< a value was substituted by another due to a Confirm */
52 HOOK_OPT_CONFIRM_C, /**< a value was substituted by a const due to a Confirm */
53 HOOK_OPT_CONFIRM_E, /**< a value was evaluated due to a Confirm */
54 HOOK_LOWERED, /**< lowered */
58 typedef enum _if_result_t {
59 IF_RESULT_SUCCESS = 0, /**< if conversion could be done */
60 IF_RESULT_SIDE_EFFECT = 1, /**< if conversion failed because of side effect */
61 IF_RESULT_SIDE_EFFECT_PHI = 2, /**< if conversion failed because of Phi node found */
62 IF_RESULT_TOO_DEEP = 3, /**< if conversion failed because of to deep DAG's */
63 IF_RESULT_BAD_CF = 4, /**< if conversion failed because of bad control flow */
64 IF_RESULT_DENIED = 5, /**< if conversion failed because of architecture deny */
69 * A generic function type.
71 typedef void (generic_func)(void);
76 typedef struct hook_entry {
77 /** A union of all possible hook types. */
79 /** This hook is called, after a new ir_op was created. */
80 void (*_hook_new_ir_op)(void *context, ir_op *op);
82 /** This hook is called, before am ir_op is destroyed. */
83 void (*_hook_free_ir_op)(void *context, ir_op *op);
85 /** This hook is called, after a new IR-node was created and before it is optimized. */
86 void (*_hook_new_node)(void *context, ir_graph *graph, ir_node *node);
88 /** This hook is called, after a node input was changed. */
89 void (*_hook_set_irn_n)(void *context, ir_node *src,
90 int pos, ir_node *tgt, ir_node *old_tgt);
92 /** This hook is called, before a node is replaced (exchange()) by another. */
93 void (*_hook_replace)(void *context, ir_node *old_node, ir_node *new_node);
95 /** This hook is called, before a node is changed into an Id node. */
96 void (*_hook_turn_into_id)(void *context, ir_node *node);
98 /** This hook is called, after a new graph was created and before the first block
99 * on this graph is build. */
100 void (*_hook_new_graph)(void *context, ir_graph *irg, entity *ent);
102 /** This hook is called before a graph is freed. */
103 void (*_hook_free_graph)(void *context, ir_graph *irg);
105 /** This hook is called before an irg walk is started. */
106 void (*_hook_irg_walk)(void *context, ir_graph *irg, generic_func *pre, generic_func *post);
108 /** This hook is called before an block wise irg walk is started. */
109 void (*_hook_irg_walk_blkwise)(void *context, ir_graph *irg, generic_func *pre, generic_func *post);
111 /** This hook is called before an block walk is started. */
112 void (*_hook_irg_block_walk)(void *context, ir_graph *irg, ir_node *node, generic_func *pre, generic_func *post);
114 /** This hook is called, when debug info must be merged. */
115 void (*_hook_merge_nodes)(void *context, ir_node **new_node_array, int new_num_entries,
116 ir_node **old_node_array, int old_num_entries, hook_opt_kind opt);
118 /** This hook is called, when reassociation is started/stopped. */
119 void (*_hook_reassociate)(void *context, int start);
121 /** This hook is called, before a node is lowered. */
122 void (*_hook_lower)(void *context, ir_node *node);
124 /** This hook is called, before a graph is inlined. */
125 void (*_hook_inline)(void *context, ir_node *call, ir_graph *irg);
127 /** This hook is called, before tail recursion is applied to a graph. */
128 void (*_hook_tail_rec)(void *context, ir_graph *irg, int n_calls);
131 void (*_hook_strength_red)(void *context, ir_graph *irg, ir_node *strong, ir_node *cmp);
133 /** This hook is called, when dead node elimination is started/stopped. */
134 void (*_hook_dead_node_elim)(void *context, ir_graph *irg, int start);
136 /** This hook is called after if conversion has run. */
137 void (*_hook_if_conversion)(void *context, ir_graph *irg, ir_node *phi, int pos, ir_node *mux, if_result_t reason);
139 /** This hook is called after a call was detected as const call */
140 void (*_hook_func_call)(void *context, ir_graph *irg, ir_node *call);
142 /** This hook is called after a Mul was replaced by a series of Shift and Add/Sub operations. */
143 void (*_hook_arch_dep_replace_mul_with_shifts)(void *context, ir_node *irn);
145 /** This hook is called after a Div/Mod/DivMod by a constant value was replaced. */
146 void (*_hook_arch_dep_replace_division_by_const)(void *context, ir_node *irn);
148 /** This hook is called after a new mode was registered. */
149 void (*_hook_new_mode)(void *context, const ir_mode *tmpl, ir_mode *mode);
152 /** the context for every hook */
155 /** needed for chaining */
156 struct hook_entry *next;
172 hook_irg_walk_blkwise,
183 hook_arch_dep_replace_mul_with_shifts,
184 hook_arch_dep_replace_division_by_const,
190 * register the hook entry.
192 * @param hook the hook type
193 * @param entry the hook entry
195 void register_hook(hook_type_t hook, hook_entry_t *entry);
197 #ifdef FIRM_ENABLE_HOOKS
199 extern hook_entry_t *hooks[hook_last];
202 * execute the hook what with the args args
203 * Do not use this macro directly.
205 #define hook_exec(what, args) do { \
207 for (p = hooks[what]; p; p = p->next){ \
208 void *ctx = p->context; \
209 p->hook._##what args; \
215 #define hook_exec(what, args)
217 #endif /* FIRM_ENABLE_HOOKS */
219 #define hook_new_ir_op(op) hook_exec(hook_new_ir_op, (ctx, op))
220 #define hook_free_ir_op(op) hook_exec(hook_free_ir_op, (ctx, op))
221 #define hook_new_node(graph, node) hook_exec(hook_new_node, (ctx, graph, node))
222 #define hook_set_irn_n(src, pos, tgt, old_tgt) \
223 hook_exec(hook_set_irn_n, (ctx, src, pos, tgt, old_tgt))
224 #define hook_replace(old, nw) hook_exec(hook_replace, (ctx, old, nw))
225 #define hook_turn_into_id(node) hook_exec(hook_turn_into_id, (ctx, node))
226 #define hook_new_graph(irg, ent) hook_exec(hook_new_graph, (ctx, irg, ent))
227 #define hook_free_graph(irg) hook_exec(hook_free_graph, (ctx, irg))
228 #define hook_irg_walk(irg, pre, post) hook_exec(hook_irg_walk, (ctx, irg, pre, post))
229 #define hook_irg_walk_blkwise(irg, pre, post) \
230 hook_exec(hook_irg_walk_blkwise, (ctx, irg, pre, post))
231 #define hook_irg_block_walk(irg, node, pre, post) \
232 hook_exec(hook_irg_block_walk, (ctx, irg, node, pre, post))
233 #define hook_merge_nodes(new_node_array, new_num_entries, old_node_array, old_num_entries, opt) \
234 hook_exec(hook_merge_nodes, (ctx, new_node_array, new_num_entries, old_node_array, old_num_entries, opt))
235 #define hook_reassociate(start) hook_exec(hook_reassociate, (ctx, start))
236 #define hook_lower(node) hook_exec(hook_lower, (ctx, node))
237 #define hook_inline(call, irg) hook_exec(hook_inline, (ctx, call, irg))
238 #define hook_tail_rec(irg, n_calls) hook_exec(hook_tail_rec, (ctx, irg, n_calls))
239 #define hook_strength_red(irg, strong, cmp) \
240 hook_exec(hook_strength_red, (ctx, irg, strong, cmp))
241 #define hook_dead_node_elim(irg, start) hook_exec(hook_dead_node_elim, (ctx, irg, start))
242 #define hook_if_conversion(irg, phi, pos, mux, reason) \
243 hook_exec(hook_if_conversion, (ctx, irg, phi, pos, mux, reason))
244 #define hook_func_call(irg, call) \
245 hook_exec(hook_func_call, (ctx, irg, call))
246 #define hook_arch_dep_replace_mul_with_shifts(irn) \
247 hook_exec(hook_arch_dep_replace_mul_with_shifts, (ctx, irn))
248 #define hook_arch_dep_replace_division_by_const(irn) \
249 hook_exec(hook_arch_dep_replace_division_by_const, (ctx, irn))
250 #define hook_new_mode(tmpl, mode) hook_exec(hook_new_mode, (ctx, tmpl, mode))
252 /* the initializer, move to hooks_t.h some day */
253 int init_hooks(void);
255 #endif /* __IRHOOKS_H__ */