1 | /* RTL hash functions. |
2 | Copyright (C) 1987-2023 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 | #include "config.h" |
21 | #include "system.h" |
22 | #include "coretypes.h" |
23 | #include "tm.h" |
24 | #include "rtl.h" |
25 | #include "rtlhash.h" |
26 | |
27 | namespace inchash |
28 | { |
29 | |
30 | /* Iteratively hash rtx X into HSTATE. */ |
31 | |
32 | void |
33 | add_rtx (const_rtx x, hash &hstate) |
34 | { |
35 | enum rtx_code code; |
36 | machine_mode mode; |
37 | int i, j; |
38 | const char *fmt; |
39 | |
40 | if (x == NULL_RTX) |
41 | return; |
42 | code = GET_CODE (x); |
43 | hstate.add_object (obj&: code); |
44 | mode = GET_MODE (x); |
45 | hstate.add_object (obj&: mode); |
46 | switch (code) |
47 | { |
48 | case REG: |
49 | hstate.add_int (REGNO (x)); |
50 | return; |
51 | case CONST_INT: |
52 | hstate.add_object (INTVAL (x)); |
53 | return; |
54 | case CONST_WIDE_INT: |
55 | for (i = 0; i < CONST_WIDE_INT_NUNITS (x); i++) |
56 | hstate.add_object (CONST_WIDE_INT_ELT (x, i)); |
57 | return; |
58 | case CONST_POLY_INT: |
59 | for (i = 0; i < NUM_POLY_INT_COEFFS; ++i) |
60 | hstate.add_wide_int (CONST_POLY_INT_COEFFS (x)[i]); |
61 | break; |
62 | case SYMBOL_REF: |
63 | if (XSTR (x, 0)) |
64 | hstate.add (XSTR (x, 0), len: strlen (XSTR (x, 0)) + 1); |
65 | return; |
66 | case LABEL_REF: |
67 | case DEBUG_EXPR: |
68 | case VALUE: |
69 | case SCRATCH: |
70 | case CONST_DOUBLE: |
71 | case CONST_FIXED: |
72 | case DEBUG_IMPLICIT_PTR: |
73 | case DEBUG_PARAMETER_REF: |
74 | return; |
75 | default: |
76 | break; |
77 | } |
78 | |
79 | fmt = GET_RTX_FORMAT (code); |
80 | for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--) |
81 | switch (fmt[i]) |
82 | { |
83 | case 'w': |
84 | hstate.add_hwi (XWINT (x, i)); |
85 | break; |
86 | case 'n': |
87 | case 'i': |
88 | hstate.add_int (XINT (x, i)); |
89 | break; |
90 | case 'p': |
91 | hstate.add_poly_int (SUBREG_BYTE (x)); |
92 | break; |
93 | case 'V': |
94 | case 'E': |
95 | j = XVECLEN (x, i); |
96 | hstate.add_int (v: j); |
97 | for (j = 0; j < XVECLEN (x, i); j++) |
98 | inchash::add_rtx (XVECEXP (x, i, j), hstate); |
99 | break; |
100 | case 'e': |
101 | inchash::add_rtx (XEXP (x, i), hstate); |
102 | break; |
103 | case 'S': |
104 | case 's': |
105 | if (XSTR (x, i)) |
106 | hstate.add (XSTR (x, 0), len: strlen (XSTR (x, 0)) + 1); |
107 | break; |
108 | default: |
109 | break; |
110 | } |
111 | } |
112 | |
113 | } |
114 | |