131
|
1 /* Manipulation of formal and actual parameters of functions and function
|
|
2 calls.
|
|
3 Copyright (C) 2017-2018 Free Software Foundation, Inc.
|
|
4
|
|
5 This file is part of GCC.
|
|
6
|
|
7 GCC is free software; you can redistribute it and/or modify it under
|
|
8 the terms of the GNU General Public License as published by the Free
|
|
9 Software Foundation; either version 3, or (at your option) any later
|
|
10 version.
|
|
11
|
|
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
15 for more details.
|
|
16
|
|
17 You should have received a copy of the GNU General Public License
|
|
18 along with GCC; see the file COPYING3. If not see
|
|
19 <http://www.gnu.org/licenses/>. */
|
|
20
|
|
21 #ifndef IPA_PARAM_MANIPULATION_H
|
|
22 #define IPA_PARAM_MANIPULATION_H
|
|
23
|
|
24 /* Operation to be performed for the parameter in ipa_parm_adjustment
|
|
25 below. */
|
|
26 enum ipa_parm_op {
|
|
27 IPA_PARM_OP_NONE,
|
|
28
|
|
29 /* This describes a brand new parameter.
|
|
30
|
|
31 The field `type' should be set to the new type, `arg_prefix'
|
|
32 should be set to the string prefix for the new DECL_NAME, and
|
|
33 `new_decl' will ultimately hold the newly created argument. */
|
|
34 IPA_PARM_OP_NEW,
|
|
35
|
|
36 /* This new parameter is an unmodified parameter at index base_index. */
|
|
37 IPA_PARM_OP_COPY,
|
|
38
|
|
39 /* This adjustment describes a parameter that is about to be removed
|
|
40 completely. Most users will probably need to book keep those so that they
|
|
41 don't leave behinfd any non default def ssa names belonging to them. */
|
|
42 IPA_PARM_OP_REMOVE
|
|
43 };
|
|
44
|
|
45 /* Structure to describe transformations of formal parameters and actual
|
|
46 arguments. Each instance describes one new parameter and they are meant to
|
|
47 be stored in a vector. Additionally, most users will probably want to store
|
|
48 adjustments about parameters that are being removed altogether so that SSA
|
|
49 names belonging to them can be replaced by SSA names of an artificial
|
|
50 variable. */
|
|
51 struct ipa_parm_adjustment
|
|
52 {
|
|
53 /* The original PARM_DECL itself, helpful for processing of the body of the
|
|
54 function itself. Intended for traversing function bodies.
|
|
55 ipa_modify_formal_parameters, ipa_modify_call_arguments and
|
|
56 ipa_combine_adjustments ignore this and use base_index.
|
|
57 ipa_modify_formal_parameters actually sets this. */
|
|
58 tree base;
|
|
59
|
|
60 /* Type of the new parameter. However, if by_ref is true, the real type will
|
|
61 be a pointer to this type. */
|
|
62 tree type;
|
|
63
|
|
64 /* Alias refrerence type to be used in MEM_REFs when adjusting caller
|
|
65 arguments. */
|
|
66 tree alias_ptr_type;
|
|
67
|
|
68 /* The new declaration when creating/replacing a parameter. Created
|
|
69 by ipa_modify_formal_parameters, useful for functions modifying
|
|
70 the body accordingly. For brand new arguments, this is the newly
|
|
71 created argument. */
|
|
72 tree new_decl;
|
|
73
|
|
74 /* New declaration of a substitute variable that we may use to replace all
|
|
75 non-default-def ssa names when a parm decl is going away. */
|
|
76 tree new_ssa_base;
|
|
77
|
|
78 /* If non-NULL and the original parameter is to be removed (copy_param below
|
|
79 is NULL), this is going to be its nonlocalized vars value. */
|
|
80 tree nonlocal_value;
|
|
81
|
|
82 /* This holds the prefix to be used for the new DECL_NAME. */
|
|
83 const char *arg_prefix;
|
|
84
|
|
85 /* Offset into the original parameter (for the cases when the new parameter
|
|
86 is a component of an original one). */
|
|
87 poly_int64_pod offset;
|
|
88
|
|
89 /* Zero based index of the original parameter this one is based on. */
|
|
90 int base_index;
|
|
91
|
|
92 /* Whether this parameter is a new parameter, a copy of an old one,
|
|
93 or one about to be removed. */
|
|
94 enum ipa_parm_op op;
|
|
95
|
|
96 /* Storage order of the original parameter (for the cases when the new
|
|
97 parameter is a component of an original one). */
|
|
98 unsigned reverse : 1;
|
|
99
|
|
100 /* The parameter is to be passed by reference. */
|
|
101 unsigned by_ref : 1;
|
|
102 };
|
|
103
|
|
104 typedef vec<ipa_parm_adjustment> ipa_parm_adjustment_vec;
|
|
105
|
|
106 vec<tree> ipa_get_vector_of_formal_parms (tree fndecl);
|
|
107 vec<tree> ipa_get_vector_of_formal_parm_types (tree fntype);
|
|
108 void ipa_modify_formal_parameters (tree fndecl, ipa_parm_adjustment_vec);
|
|
109 void ipa_modify_call_arguments (struct cgraph_edge *, gcall *,
|
|
110 ipa_parm_adjustment_vec);
|
|
111 ipa_parm_adjustment_vec ipa_combine_adjustments (ipa_parm_adjustment_vec,
|
|
112 ipa_parm_adjustment_vec);
|
|
113 void ipa_dump_param_adjustments (FILE *, ipa_parm_adjustment_vec, tree);
|
|
114
|
|
115 bool ipa_modify_expr (tree *, bool, ipa_parm_adjustment_vec);
|
|
116 ipa_parm_adjustment *ipa_get_adjustment_candidate (tree **, bool *,
|
|
117 ipa_parm_adjustment_vec,
|
|
118 bool);
|
|
119
|
|
120 #endif /* IPA_PARAM_MANIPULATION_H */
|