1 /* Convert language-specific tree expression to rtl instructions,
3 Copyright (C) 1988-2015 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
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/>. */
24 #include "coretypes.h"
32 /* Expand C++-specific constants. Currently, this means PTRMEM_CST. */
35 cplus_expand_constant (tree cst
)
37 switch (TREE_CODE (cst
))
41 tree type
= TREE_TYPE (cst
);
44 /* Find the member. */
45 member
= PTRMEM_CST_MEMBER (cst
);
47 /* We can't lower this until the class is complete. */
48 if (!COMPLETE_TYPE_P (DECL_CONTEXT (member
)))
51 if (TREE_CODE (member
) == FIELD_DECL
)
53 /* Find the offset for the field. */
54 cst
= byte_position (member
);
55 while (!same_type_p (DECL_CONTEXT (member
),
56 TYPE_PTRMEM_CLASS_TYPE (type
)))
58 /* The MEMBER must have been nestled within an
59 anonymous aggregate contained in TYPE. Find the
60 anonymous aggregate. */
61 member
= lookup_anon_field (TYPE_PTRMEM_CLASS_TYPE (type
),
62 DECL_CONTEXT (member
));
63 cst
= size_binop (PLUS_EXPR
, cst
, byte_position (member
));
65 cst
= fold (build_nop (type
, cst
));
72 expand_ptrmemfunc_cst (cst
, &delta
, &pfn
);
73 cst
= build_ptrmemfunc1 (type
, delta
, pfn
);
81 unsigned HOST_WIDE_INT idx
;
82 FOR_EACH_VEC_SAFE_ELT (CONSTRUCTOR_ELTS (cst
), idx
, elt
)
83 elt
->value
= cplus_expand_constant (elt
->value
);
87 /* There's nothing to do. */
94 /* Called whenever the expression EXPR is used in an rvalue context.
95 When REJECT_BUILTIN is true the expression is checked to make sure
96 it doesn't make it possible to obtain the address of a GCC built-in
97 function with no library fallback (or any of its bits, such as in
98 a conversion to bool). */
100 mark_rvalue_use (tree expr
,
101 location_t loc
/* = UNKNOWN_LOCATION */,
102 bool reject_builtin
/* = true */)
104 if (reject_builtin
&& reject_gcc_builtin (expr
, loc
))
105 return error_mark_node
;
107 mark_exp_read (expr
);
111 /* Called whenever an expression is used in an lvalue context. */
114 mark_lvalue_use (tree expr
)
116 mark_exp_read (expr
);
120 /* Called whenever an expression is used in a type use context. */
123 mark_type_use (tree expr
)
125 mark_exp_read (expr
);
129 /* Mark EXP as read, not just set, for set but not used -Wunused
133 mark_exp_read (tree exp
)
138 switch (TREE_CODE (exp
))
142 DECL_READ_P (exp
) = 1;
153 mark_exp_read (TREE_OPERAND (exp
, 0));
156 mark_exp_read (TREE_OPERAND (exp
, 1));
159 if (TREE_OPERAND (exp
, 1))
160 mark_exp_read (TREE_OPERAND (exp
, 1));
161 if (TREE_OPERAND (exp
, 2))
162 mark_exp_read (TREE_OPERAND (exp
, 2));