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111
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1 /* RTL hash functions.
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2 Copyright (C) 1987-2017 Free Software Foundation, Inc.
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify it under
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7 the terms of the GNU General Public License as published by the Free
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8 Software Foundation; either version 3, or (at your option) any later
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9 version.
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10
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11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with GCC; see the file COPYING3. If not see
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18 <http://www.gnu.org/licenses/>. */
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19
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20 #include "config.h"
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21 #include "system.h"
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22 #include "coretypes.h"
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23 #include "tm.h"
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24 #include "rtl.h"
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25 #include "rtlhash.h"
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26
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27 namespace inchash
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28 {
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29
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30 /* Iteratively hash rtx X into HSTATE. */
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31
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32 void
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33 add_rtx (const_rtx x, hash &hstate)
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34 {
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35 enum rtx_code code;
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36 machine_mode mode;
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37 int i, j;
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38 const char *fmt;
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39
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40 if (x == NULL_RTX)
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41 return;
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42 code = GET_CODE (x);
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43 hstate.add_object (code);
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44 mode = GET_MODE (x);
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45 hstate.add_object (mode);
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46 switch (code)
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47 {
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48 case REG:
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49 hstate.add_int (REGNO (x));
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50 return;
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51 case CONST_INT:
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52 hstate.add_object (INTVAL (x));
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53 return;
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54 case CONST_WIDE_INT:
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55 for (i = 0; i < CONST_WIDE_INT_NUNITS (x); i++)
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56 hstate.add_object (CONST_WIDE_INT_ELT (x, i));
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57 return;
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58 case SYMBOL_REF:
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59 if (XSTR (x, 0))
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60 hstate.add (XSTR (x, 0), strlen (XSTR (x, 0)) + 1);
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61 return;
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62 case LABEL_REF:
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63 case DEBUG_EXPR:
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64 case VALUE:
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65 case SCRATCH:
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66 case CONST_DOUBLE:
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67 case CONST_FIXED:
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68 case DEBUG_IMPLICIT_PTR:
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69 case DEBUG_PARAMETER_REF:
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70 return;
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71 default:
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72 break;
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73 }
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74
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75 fmt = GET_RTX_FORMAT (code);
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76 for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
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77 switch (fmt[i])
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78 {
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79 case 'w':
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80 hstate.add_object (XWINT (x, i));
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81 break;
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82 case 'n':
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83 case 'i':
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84 hstate.add_object (XINT (x, i));
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85 break;
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86 case 'V':
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87 case 'E':
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88 j = XVECLEN (x, i);
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89 hstate.add_int (j);
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90 for (j = 0; j < XVECLEN (x, i); j++)
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91 inchash::add_rtx (XVECEXP (x, i, j), hstate);
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92 break;
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93 case 'e':
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94 inchash::add_rtx (XEXP (x, i), hstate);
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95 break;
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96 case 'S':
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97 case 's':
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98 if (XSTR (x, i))
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99 hstate.add (XSTR (x, 0), strlen (XSTR (x, 0)) + 1);
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100 break;
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101 default:
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102 break;
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103 }
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104 }
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105
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106 }
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