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77dec518 | 1 | /* Data type conversion |
8d9254fc | 2 | Copyright (C) 1987-2020 Free Software Foundation, Inc. |
6de9cd9a DN |
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 | |
d234d788 | 8 | Software Foundation; either version 3, or (at your option) any later |
6de9cd9a DN |
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 | |
d234d788 NC |
17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
6de9cd9a DN |
19 | |
20 | ||
77dec518 SB |
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'. */ | |
6de9cd9a DN |
24 | |
25 | #include "config.h" | |
26 | #include "system.h" | |
27 | #include "coretypes.h" | |
2adfab87 | 28 | #include "tree.h" |
40e23961 | 29 | #include "fold-const.h" |
6de9cd9a | 30 | #include "convert.h" |
6de9cd9a | 31 | |
63ee5404 JB |
32 | #include "gfortran.h" |
33 | #include "trans.h" | |
34 | #include "trans-types.h" | |
35 | ||
87a60f68 | 36 | /* Prepare expr to be an argument of a TRUTH_NOT_EXPR, |
77dec518 | 37 | or validate its data type for a GIMPLE `if' or `while' statement. |
87a60f68 | 38 | |
63ee5404 | 39 | The resulting type should always be `logical_type_node'. */ |
87a60f68 SB |
40 | |
41 | static tree | |
77dec518 | 42 | truthvalue_conversion (tree expr) |
87a60f68 SB |
43 | { |
44 | switch (TREE_CODE (TREE_TYPE (expr))) | |
45 | { | |
46 | case BOOLEAN_TYPE: | |
63ee5404 | 47 | if (TREE_TYPE (expr) == logical_type_node) |
87a60f68 SB |
48 | return expr; |
49 | else if (COMPARISON_CLASS_P (expr)) | |
50 | { | |
63ee5404 | 51 | TREE_TYPE (expr) = logical_type_node; |
87a60f68 SB |
52 | return expr; |
53 | } | |
54 | else if (TREE_CODE (expr) == NOP_EXPR) | |
55 | return fold_build1_loc (input_location, NOP_EXPR, | |
63ee5404 JB |
56 | logical_type_node, |
57 | TREE_OPERAND (expr, 0)); | |
87a60f68 | 58 | else |
63ee5404 JB |
59 | return fold_build1_loc (input_location, NOP_EXPR, |
60 | logical_type_node, | |
87a60f68 SB |
61 | expr); |
62 | ||
63 | case INTEGER_TYPE: | |
64 | if (TREE_CODE (expr) == INTEGER_CST) | |
63ee5404 JB |
65 | return integer_zerop (expr) ? logical_false_node |
66 | : logical_true_node; | |
87a60f68 | 67 | else |
63ee5404 JB |
68 | return fold_build2_loc (input_location, NE_EXPR, |
69 | logical_type_node, | |
87a60f68 SB |
70 | expr, build_int_cst (TREE_TYPE (expr), 0)); |
71 | ||
72 | default: | |
77dec518 | 73 | gcc_unreachable (); |
87a60f68 SB |
74 | } |
75 | } | |
6de9cd9a DN |
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. */ | |
77dec518 | 82 | |
6de9cd9a DN |
83 | tree |
84 | convert (tree type, tree expr) | |
85 | { | |
86 | tree e = expr; | |
77dec518 | 87 | enum tree_code code; |
6de9cd9a | 88 | |
77dec518 SB |
89 | if (type == TREE_TYPE (expr)) |
90 | return expr; | |
91 | ||
92 | if (TREE_CODE (type) == ERROR_MARK | |
6de9cd9a | 93 | || TREE_CODE (expr) == ERROR_MARK |
77dec518 | 94 | || TREE_CODE (TREE_TYPE (expr)) == ERROR_MARK) |
6de9cd9a DN |
95 | return expr; |
96 | ||
77dec518 SB |
97 | gcc_checking_assert (TREE_CODE (TREE_TYPE (expr)) != VOID_TYPE); |
98 | ||
6de9cd9a | 99 | if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (TREE_TYPE (expr))) |
433ce291 | 100 | return fold_build1_loc (input_location, NOP_EXPR, type, expr); |
77dec518 SB |
101 | |
102 | code = TREE_CODE (type); | |
6de9cd9a | 103 | if (code == VOID_TYPE) |
433ce291 | 104 | return fold_build1_loc (input_location, CONVERT_EXPR, type, e); |
6de9cd9a | 105 | if (code == BOOLEAN_TYPE) |
f8627856 SB |
106 | return fold_build1_loc (input_location, NOP_EXPR, type, |
107 | truthvalue_conversion (e)); | |
77dec518 SB |
108 | if (code == INTEGER_TYPE) |
109 | return fold (convert_to_integer (type, e)); | |
6de9cd9a DN |
110 | if (code == POINTER_TYPE || code == REFERENCE_TYPE) |
111 | return fold (convert_to_pointer (type, e)); | |
112 | if (code == REAL_TYPE) | |
113 | return fold (convert_to_real (type, e)); | |
114 | if (code == COMPLEX_TYPE) | |
115 | return fold (convert_to_complex (type, e)); | |
116 | if (code == VECTOR_TYPE) | |
117 | return fold (convert_to_vector (type, e)); | |
118 | ||
77dec518 | 119 | gcc_unreachable (); |
6de9cd9a | 120 | } |
77dec518 | 121 |