1 /* Perform optimizations on tree structure.
2 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004
3 Free Software Foundation, Inc.
4 Written by Mark Michell (mark@codesourcery.com).
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to the Free
20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
25 #include "coretypes.h"
30 #include "insn-config.h"
32 #include "integrate.h"
38 #include "tree-inline.h"
40 #include "langhooks.h"
41 #include "diagnostic.h"
42 #include "tree-dump.h"
43 #include "tree-gimple.h"
47 static void update_cloned_parm (tree, tree);
49 /* CLONED_PARM is a copy of CLONE, generated for a cloned constructor
50 or destructor. Update it to ensure that the source-position for
51 the cloned parameter matches that for the original, and that the
52 debugging generation code will be able to find the original PARM. */
55 update_cloned_parm (tree parm, tree cloned_parm)
57 DECL_ABSTRACT_ORIGIN (cloned_parm) = parm;
59 /* We may have taken its address. */
60 TREE_ADDRESSABLE (cloned_parm) = TREE_ADDRESSABLE (parm);
62 /* The definition might have different constness. */
63 TREE_READONLY (cloned_parm) = TREE_READONLY (parm);
65 TREE_USED (cloned_parm) = TREE_USED (parm);
67 /* The name may have changed from the declaration. */
68 DECL_NAME (cloned_parm) = DECL_NAME (parm);
69 DECL_SOURCE_LOCATION (cloned_parm) = DECL_SOURCE_LOCATION (parm);
72 /* FN is a function that has a complete body. Clone the body as
73 necessary. Returns nonzero if there's no longer any need to
74 process the main body. */
77 maybe_clone_body (tree fn)
81 /* We only clone constructors and destructors. */
82 if (!DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (fn)
83 && !DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (fn))
86 /* Emit the DWARF1 abstract instance. */
87 (*debug_hooks->deferred_inline_function) (fn);
89 /* We know that any clones immediately follow FN in the TYPE_METHODS
92 for (clone = TREE_CHAIN (fn);
93 clone && DECL_CLONED_FUNCTION_P (clone);
94 clone = TREE_CHAIN (clone))
101 /* Update CLONE's source position information to match FN's. */
102 DECL_SOURCE_LOCATION (clone) = DECL_SOURCE_LOCATION (fn);
103 DECL_INLINE (clone) = DECL_INLINE (fn);
104 DECL_DECLARED_INLINE_P (clone) = DECL_DECLARED_INLINE_P (fn);
105 DECL_COMDAT (clone) = DECL_COMDAT (fn);
106 DECL_WEAK (clone) = DECL_WEAK (fn);
107 DECL_ONE_ONLY (clone) = DECL_ONE_ONLY (fn);
108 DECL_SECTION_NAME (clone) = DECL_SECTION_NAME (fn);
109 DECL_USE_TEMPLATE (clone) = DECL_USE_TEMPLATE (fn);
110 DECL_EXTERNAL (clone) = DECL_EXTERNAL (fn);
111 DECL_INTERFACE_KNOWN (clone) = DECL_INTERFACE_KNOWN (fn);
112 DECL_NOT_REALLY_EXTERN (clone) = DECL_NOT_REALLY_EXTERN (fn);
113 TREE_PUBLIC (clone) = TREE_PUBLIC (fn);
114 DECL_VISIBILITY (clone) = DECL_VISIBILITY (fn);
115 DECL_VISIBILITY_SPECIFIED (clone) = DECL_VISIBILITY_SPECIFIED (fn);
117 /* Adjust the parameter names and locations. */
118 parm = DECL_ARGUMENTS (fn);
119 clone_parm = DECL_ARGUMENTS (clone);
120 /* Update the `this' parameter, which is always first. */
121 update_cloned_parm (parm, clone_parm);
122 parm = TREE_CHAIN (parm);
123 clone_parm = TREE_CHAIN (clone_parm);
124 if (DECL_HAS_IN_CHARGE_PARM_P (fn))
125 parm = TREE_CHAIN (parm);
126 if (DECL_HAS_VTT_PARM_P (fn))
127 parm = TREE_CHAIN (parm);
128 if (DECL_HAS_VTT_PARM_P (clone))
129 clone_parm = TREE_CHAIN (clone_parm);
131 parm = TREE_CHAIN (parm), clone_parm = TREE_CHAIN (clone_parm))
132 /* Update this parameter. */
133 update_cloned_parm (parm, clone_parm);
135 /* Start processing the function. */
136 start_preparsed_function (clone, NULL_TREE, SF_PRE_PARSED);
138 /* Remap the parameters. */
139 decl_map = splay_tree_new (splay_tree_compare_pointers, NULL, NULL);
141 parm = DECL_ARGUMENTS (fn),
142 clone_parm = DECL_ARGUMENTS (clone);
145 parm = TREE_CHAIN (parm))
147 /* Map the in-charge parameter to an appropriate constant. */
148 if (DECL_HAS_IN_CHARGE_PARM_P (fn) && parmno == 1)
151 in_charge = in_charge_arg_for_name (DECL_NAME (clone));
152 splay_tree_insert (decl_map,
153 (splay_tree_key) parm,
154 (splay_tree_value) in_charge);
156 else if (DECL_ARTIFICIAL (parm)
157 && DECL_NAME (parm) == vtt_parm_identifier)
159 /* For a subobject constructor or destructor, the next
160 argument is the VTT parameter. Remap the VTT_PARM
161 from the CLONE to this parameter. */
162 if (DECL_HAS_VTT_PARM_P (clone))
164 DECL_ABSTRACT_ORIGIN (clone_parm) = parm;
165 splay_tree_insert (decl_map,
166 (splay_tree_key) parm,
167 (splay_tree_value) clone_parm);
168 clone_parm = TREE_CHAIN (clone_parm);
170 /* Otherwise, map the VTT parameter to `NULL'. */
173 splay_tree_insert (decl_map,
174 (splay_tree_key) parm,
175 (splay_tree_value) null_pointer_node);
178 /* Map other parameters to their equivalents in the cloned
182 splay_tree_insert (decl_map,
183 (splay_tree_key) parm,
184 (splay_tree_value) clone_parm);
185 clone_parm = TREE_CHAIN (clone_parm);
189 /* Clone the body. */
190 clone_body (clone, fn, decl_map);
193 splay_tree_delete (decl_map);
195 /* The clone can throw iff the original function can throw. */
196 cp_function_chain->can_throw = !TREE_NOTHROW (fn);
198 /* Now, expand this function into RTL, if appropriate. */
200 BLOCK_ABSTRACT_ORIGIN (DECL_INITIAL (clone)) = DECL_INITIAL (fn);
201 expand_or_defer_fn (clone);
203 pop_from_top_level ();
205 /* We don't need to process the original function any further. */