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1 : : /* Data type conversion
2 : : Copyright (C) 1987-2024 Free Software Foundation, Inc.
3 : :
4 : : This file is part of GCC.
5 : :
6 : : GCC is free software; you can redistribute it and/or modify it under
7 : : the terms of the GNU General Public License as published by the Free
8 : : Software Foundation; either version 3, or (at your option) any later
9 : : version.
10 : :
11 : : GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 : : WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 : : FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 : : for more details.
15 : :
16 : : You should have received a copy of the GNU General Public License
17 : : along with GCC; see the file COPYING3. If not see
18 : : <http://www.gnu.org/licenses/>. */
19 : :
20 : :
21 : : /* This file contains the functions for converting expressions to
22 : : different data types for the translation of the gfortran internal
23 : : representation to GIMPLE. The only entry point is `convert'. */
24 : :
25 : : #include "config.h"
26 : : #include "system.h"
27 : : #include "coretypes.h"
28 : : #include "tree.h"
29 : : #include "fold-const.h"
30 : : #include "convert.h"
31 : :
32 : : #include "gfortran.h"
33 : : #include "trans.h"
34 : : #include "trans-types.h"
35 : :
36 : : /* Prepare expr to be an argument of a TRUTH_NOT_EXPR,
37 : : or validate its data type for a GIMPLE `if' or `while' statement.
38 : :
39 : : The resulting type should always be `logical_type_node'. */
40 : :
41 : : static tree
42 : 72352 : truthvalue_conversion (tree expr)
43 : : {
44 : 72352 : switch (TREE_CODE (TREE_TYPE (expr)))
45 : : {
46 : 71043 : case BOOLEAN_TYPE:
47 : 71043 : if (TREE_TYPE (expr) == logical_type_node)
48 : : return expr;
49 : 68938 : else if (COMPARISON_CLASS_P (expr))
50 : : {
51 : 0 : TREE_TYPE (expr) = logical_type_node;
52 : 0 : return expr;
53 : : }
54 : 68938 : else if (TREE_CODE (expr) == NOP_EXPR)
55 : 9 : return fold_build1_loc (input_location, NOP_EXPR,
56 : : logical_type_node,
57 : 18 : TREE_OPERAND (expr, 0));
58 : : else
59 : 68929 : return fold_build1_loc (input_location, NOP_EXPR,
60 : : logical_type_node,
61 : 68929 : expr);
62 : :
63 : 1309 : case INTEGER_TYPE:
64 : 1309 : if (TREE_CODE (expr) == INTEGER_CST)
65 : 0 : return integer_zerop (expr) ? logical_false_node
66 : : : logical_true_node;
67 : : else
68 : 1309 : return fold_build2_loc (input_location, NE_EXPR,
69 : : logical_type_node,
70 : 1309 : expr, build_int_cst (TREE_TYPE (expr), 0));
71 : :
72 : 0 : default:
73 : 0 : gcc_unreachable ();
74 : : }
75 : : }
76 : :
77 : : /* Create an expression whose value is that of EXPR,
78 : : converted to type TYPE. The TREE_TYPE of the value
79 : : is always TYPE. This function implements all reasonable
80 : : conversions; callers should filter out those that are
81 : : not permitted by the language being compiled. */
82 : :
83 : : tree
84 : 965027 : convert (tree type, tree expr)
85 : : {
86 : 965027 : tree e = expr;
87 : 965027 : enum tree_code code;
88 : :
89 : 965027 : if (type == TREE_TYPE (expr))
90 : : return expr;
91 : :
92 : 583101 : if (TREE_CODE (type) == ERROR_MARK
93 : 583101 : || TREE_CODE (expr) == ERROR_MARK
94 : 1166202 : || TREE_CODE (TREE_TYPE (expr)) == ERROR_MARK)
95 : : return expr;
96 : :
97 : 583101 : gcc_checking_assert (TREE_CODE (TREE_TYPE (expr)) != VOID_TYPE);
98 : :
99 : 583101 : if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (TREE_TYPE (expr)))
100 : 5019 : return fold_build1_loc (input_location, NOP_EXPR, type, expr);
101 : :
102 : 578082 : code = TREE_CODE (type);
103 : 578082 : if (code == VOID_TYPE)
104 : 0 : return fold_build1_loc (input_location, CONVERT_EXPR, type, e);
105 : : if (code == BOOLEAN_TYPE)
106 : 72352 : return fold_build1_loc (input_location, NOP_EXPR, type,
107 : 72352 : truthvalue_conversion (e));
108 : : if (code == INTEGER_TYPE)
109 : 298539 : return fold (convert_to_integer (type, e));
110 : : if (code == POINTER_TYPE || code == REFERENCE_TYPE)
111 : 194327 : return fold (convert_to_pointer (type, e));
112 : : if (code == REAL_TYPE)
113 : 11560 : return fold (convert_to_real (type, e));
114 : : if (code == COMPLEX_TYPE)
115 : 1304 : return fold (convert_to_complex (type, e));
116 : : if (code == VECTOR_TYPE)
117 : 0 : return fold (convert_to_vector (type, e));
118 : :
119 : 0 : gcc_unreachable ();
120 : : }
121 : :
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