bugfix: remove dead blocks from keepalive
[libfirm] / ir / ir / irhooks.h
1 /*
2  * Project:     libFIRM
3  * File name:   ir/ir/irhooks.h
4  * Purpose:     Generic hooks for various libFirm functions.
5  * Author:      Michael Beck
6  * Created:
7  * CVS-ID:      $Id$
8  * Copyright:   (C) 1998-2005 Universität Karlsruhe
9  * Licence:     This file protected by GPL -  GNU GENERAL PUBLIC LICENSE.
10  */
11
12 /**
13  * @file irhooks.h
14  *
15  * Generic hooks for various libFirm functions.
16  *
17  * @author Michael Beck
18  */
19 #ifndef __IRHOOKS_H__
20 #define __IRHOOKS_H__
21
22 #include "firm_config.h"
23 #include "irop.h"
24 #include "irnode.h"
25 #include "irgraph.h"
26
27 /**
28  * options for the hook_merge_nodes hook
29  */
30 typedef enum {
31   HOOK_OPT_STG,         /**< straightening optimization */
32   HOOK_OPT_IFSIM,       /**< if simplification */
33   HOOK_OPT_CONST_EVAL,  /**< constant evaluation */
34   HOOK_OPT_ALGSIM,      /**< algebraic simplification */
35   HOOK_OPT_PHI,         /**< Phi optmization */
36   HOOK_OPT_WAW,         /**< Write-After-Write optimization */
37   HOOK_OPT_WAR,         /**< Write-After-Read optimization */
38   HOOK_OPT_RAW,         /**< Read-After-Write optimization */
39   HOOK_OPT_RAR,         /**< Read-After-Read optimization */
40   HOOK_OPT_RC,          /**< Read-a-Const optimization */
41   HOOK_OPT_TUPLE,       /**< Tuple optimization */
42   HOOK_OPT_ID,          /**< ID optimization */
43   HOOK_OPT_CSE,         /**< common subexpression elimination */
44   HOOK_OPT_STRENGTH_RED,/**< strength reduction */
45   HOOK_OPT_ARCH_DEP,    /**< architecture dependent optimization */
46   HOOK_OPT_REASSOC,     /**< reassociation */
47   HOOK_OPT_POLY_CALL,   /**< polymorphic call optimization */
48   HOOK_LOWERED,         /**< lowered */
49
50   HOOK_OPT_LAST
51 } hook_opt_kind;
52
53 /**
54  * a hook entry
55  */
56 typedef struct hook_entry {
57   /** a union of all possible hook types */
58   union {
59     void (*_hook_new_ir_op)(void *context, ir_op *op);
60     void (*_hook_free_ir_op)(void *context, ir_op *op);
61     void (*_hook_new_node)(void *context, ir_node *node);
62     void (*_hook_turn_into_id)(void *context, ir_node *node);
63     void (*_hook_new_graph)(void *context, ir_graph *irg, entity *ent);
64     void (*_hook_free_graph)(void *context, ir_graph *irg);
65     void (*_hook_irg_walk)(void *context, ir_graph *irg, void *pre, void *post);
66     void (*_hook_irg_walk_blkwise)(void *context, ir_graph *irg, void *pre, void *post);
67     void (*_hook_irg_block_walk)(void *context, ir_graph *irg, ir_node *node, void *pre, void *post);
68     void (*_hook_merge_nodes)(void *context, ir_node **new_node_array, int new_num_entries, ir_node **old_node_array, int old_num_entries, hook_opt_kind opt);
69     void (*_hook_reassociate)(void *context, int start);
70     void (*_hook_lower)(void *context, ir_node *node);
71     void (*_hook_inline)(void *context, ir_node *call, ir_graph *irg);
72     void (*_hook_tail_rec)(void *context, ir_graph *irg);
73     void (*_hook_strength_red)(void *context, ir_graph *irg, ir_node *strong, ir_node *cmp);
74     void (*_hook_dead_node_elim_start)(void *context, ir_graph *irg);
75     void (*_hook_dead_node_elim_stop)(void *context, ir_graph *irg);
76     void (*_hook_arch_dep_replace_mul_with_shifts)(void *context, ir_node *irn);
77     void (*_hook_arch_dep_replace_div_by_const)(void *context, ir_node *irn);
78     void (*_hook_arch_dep_replace_mod_by_const)(void *context, ir_node *irn);
79     void (*_hook_arch_dep_replace_DivMod_by_const)(void *context, ir_node *irn);
80   } hook;
81
82   /** the context for every hook */
83   void *context;
84
85   /** needed for chaining */
86   struct hook_entry *next;
87 } hook_entry_t;
88
89 /**
90  * possible hooks
91  */
92 typedef enum {
93   hook_new_ir_op,
94   hook_free_ir_op,
95   hook_new_node,
96   hook_turn_into_id,
97   hook_new_graph,
98   hook_free_graph,
99   hook_irg_walk,
100   hook_irg_walk_blkwise,
101   hook_irg_block_walk,
102   hook_merge_nodes,
103   hook_reassociate,
104   hook_lower,
105   hook_inline,
106   hook_tail_rec,
107   hook_strength_red,
108   hook_dead_node_elim_start,
109   hook_dead_node_elim_stop,
110   hook_arch_dep_replace_mul_with_shifts,
111   hook_arch_dep_replace_div_by_const,
112   hook_arch_dep_replace_mod_by_const,
113   hook_arch_dep_replace_DivMod_by_const,
114   hook_last,
115 } hook_type_t;
116
117 /**
118  * register the hook entry.
119  *
120  * @param hook   the hook type
121  * @rapam entry  the hook entry
122  */
123 void register_hook(hook_type_t hook, hook_entry_t *entry);
124
125 #ifdef FIRM_ENABLE_HOOKS
126
127 extern hook_entry_t *hooks[hook_last];
128
129 /**
130  * execute the hook what with the args args
131  * Do not use this macro directly.
132  */
133 #define hook_exec(what, args) do {       \
134   hook_entry_t *p;                       \
135   for (p = hooks[what]; p; p = p->next){ \
136     void *ctx = p->context;              \
137     p->hook._##what args;                \
138   }                                      \
139 } while (0)
140
141 #else
142
143 #define hook_exec(what, args)
144
145 #endif /* FIRM_ENABLE_HOOKS */
146
147 #define hook_new_ir_op(op)                hook_exec(hook_new_ir_op, (ctx, op))
148 #define hook_free_ir_op(op)               hook_exec(hook_free_ir_op, (ctx, op))
149 #define hook_new_node(node)               hook_exec(hook_new_node, (ctx, node))
150 #define hook_turn_into_id(node)           hook_exec(hook_turn_into_id, (ctx, node))
151 #define hook_new_graph(irg, ent)          hook_exec(hook_new_graph, (ctx, irg, ent))
152 #define hook_free_graph(irg)              hook_exec(hook_free_graph, (ctx, irg))
153 #define hook_irg_walk(irg, pre, post)     hook_exec(hook_irg_walk, (ctx, irg, pre, post))
154 #define hook_irg_walk_blkwise(irg, pre, post) \
155   hook_exec(hook_irg_walk_blkwise, (ctx, irg, pre, post))
156 #define hook_irg_block_walk(irg, node, pre, post) \
157   hook_exec(hook_irg_block_walk, (ctx, irg, node, pre, post))
158 #define hook_merge_nodes(new_node_array, new_num_entries, old_node_array, old_num_entries, opt) \
159   hook_exec(hook_merge_nodes, (ctx, new_node_array, new_num_entries, old_node_array, old_num_entries, opt))
160 #define hook_reassociate(start)           hook_exec(hook_reassociate, (ctx, start))
161 #define hook_lower(node)                  hook_exec(hook_lower, (ctx, node))
162 #define hook_inline(call, irg)            hook_exec(hook_inline, (ctx, call, irg))
163 #define hook_tail_rec(irg)                hook_exec(hook_tail_rec, (ctx, irg))
164 #define hook_strength_red(irg, strong, cmp) \
165   hook_exec(hook_strength_red, (ctx, irg, strong, cmp))
166 #define hook_dead_node_elim_start(irg)    hook_exec(hook_dead_node_elim_start, (ctx, irg))
167 #define hook_dead_node_elim_stop(irg)     hook_exec(hook_dead_node_elim_stop, (ctx, irg))
168 #define hook_arch_dep_replace_mul_with_shifts(irn) \
169   hook_exec(hook_arch_dep_replace_mul_with_shifts, (ctx, irn))
170 #define hook_arch_dep_replace_div_by_const(irn) \
171   hook_exec(hook_arch_dep_replace_div_by_const, (ctx, irn))
172 #define hook_arch_dep_replace_mod_by_const(irn) \
173   hook_exec(hook_arch_dep_replace_mod_by_const, (ctx, irn))
174 #define hook_arch_dep_replace_DivMod_by_const(irn) \
175   hook_exec(hook_arch_dep_replace_DivMod_by_const, (ctx, irn))
176
177 /* the initializer, move to hooks_t.h some day */
178 int init_hooks(void);
179
180 #endif /* __IRHOOKS_H__ */