1 /* RTL hash functions.
2 Copyright (C) 1987-2018 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
add_rtx(const_rtx x,hash & hstate)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 (code);
44 mode = GET_MODE (x);
45 hstate.add_object (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), 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 (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), strlen (XSTR (x, 0)) + 1);
107 break;
108 default:
109 break;
110 }
111 }
112
113 }
114