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annotate gcc/regset.h @ 131:84e7813d76e9

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gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
parents 04ced10e8804
children 1830386684a0
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63
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1 /* Define regsets.
131
84e7813d76e9 gcc-8.2
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2 Copyright (C) 1987-2018 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 #ifndef GCC_REGSET_H
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21 #define GCC_REGSET_H
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22
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23 /* TODO: regset is just a bitmap in its implementation. The compiler does
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24 not consistently use one or the other, i.e. sometimes variables are
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25 declared as bitmap but they are actually regsets and regset accessors
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26 are used, and vice versa, or mixed (see e.g. spilled_regs in IRA).
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27
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28 This should be cleaned up, either by just dropping the regset type, or
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29 by changing all bitmaps that are really regsets to the regset type. For
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30 the latter option, a good start would be to change everything allocated
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31 on the reg_obstack to regset. */
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32
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33
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34 /* Head of register set linked list. */
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35 typedef bitmap_head regset_head;
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36
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37 /* A pointer to a regset_head. */
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38 typedef bitmap regset;
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39
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40 /* Allocate a register set with oballoc. */
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41 #define ALLOC_REG_SET(OBSTACK) BITMAP_ALLOC (OBSTACK)
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42
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43 /* Do any cleanup needed on a regset when it is no longer used. */
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44 #define FREE_REG_SET(REGSET) BITMAP_FREE (REGSET)
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45
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46 /* Initialize a new regset. */
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47 #define INIT_REG_SET(HEAD) bitmap_initialize (HEAD, &reg_obstack)
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48
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49 /* Clear a register set by freeing up the linked list. */
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50 #define CLEAR_REG_SET(HEAD) bitmap_clear (HEAD)
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51
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52 /* Copy a register set to another register set. */
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53 #define COPY_REG_SET(TO, FROM) bitmap_copy (TO, FROM)
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54
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55 /* Compare two register sets. */
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56 #define REG_SET_EQUAL_P(A, B) bitmap_equal_p (A, B)
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57
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58 /* `and' a register set with a second register set. */
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59 #define AND_REG_SET(TO, FROM) bitmap_and_into (TO, FROM)
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60
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61 /* `and' the complement of a register set with a register set. */
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62 #define AND_COMPL_REG_SET(TO, FROM) bitmap_and_compl_into (TO, FROM)
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63
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64 /* Inclusive or a register set with a second register set. */
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65 #define IOR_REG_SET(TO, FROM) bitmap_ior_into (TO, FROM)
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66
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67 /* Exclusive or a register set with a second register set. */
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68 #define XOR_REG_SET(TO, FROM) bitmap_xor_into (TO, FROM)
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69
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70 /* Or into TO the register set FROM1 `and'ed with the complement of FROM2. */
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71 #define IOR_AND_COMPL_REG_SET(TO, FROM1, FROM2) \
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72 bitmap_ior_and_compl_into (TO, FROM1, FROM2)
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73
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74 /* Clear a single register in a register set. */
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75 #define CLEAR_REGNO_REG_SET(HEAD, REG) bitmap_clear_bit (HEAD, REG)
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76
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77 /* Set a single register in a register set. */
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78 #define SET_REGNO_REG_SET(HEAD, REG) bitmap_set_bit (HEAD, REG)
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79
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80 /* Return true if a register is set in a register set. */
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81 #define REGNO_REG_SET_P(TO, REG) bitmap_bit_p (TO, REG)
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82
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83 /* Copy the hard registers in a register set to the hard register set. */
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84 extern void reg_set_to_hard_reg_set (HARD_REG_SET *, const_bitmap);
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85 #define REG_SET_TO_HARD_REG_SET(TO, FROM) \
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86 do { \
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87 CLEAR_HARD_REG_SET (TO); \
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88 reg_set_to_hard_reg_set (&TO, FROM); \
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89 } while (0)
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90
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91 typedef bitmap_iterator reg_set_iterator;
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92
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93 /* Loop over all registers in REGSET, starting with MIN, setting REGNUM to the
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94 register number and executing CODE for all registers that are set. */
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95 #define EXECUTE_IF_SET_IN_REG_SET(REGSET, MIN, REGNUM, RSI) \
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96 EXECUTE_IF_SET_IN_BITMAP (REGSET, MIN, REGNUM, RSI)
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97
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98 /* Loop over all registers in REGSET1 and REGSET2, starting with MIN, setting
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99 REGNUM to the register number and executing CODE for all registers that are
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100 set in the first regset and not set in the second. */
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101 #define EXECUTE_IF_AND_COMPL_IN_REG_SET(REGSET1, REGSET2, MIN, REGNUM, RSI) \
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102 EXECUTE_IF_AND_COMPL_IN_BITMAP (REGSET1, REGSET2, MIN, REGNUM, RSI)
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103
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104 /* Loop over all registers in REGSET1 and REGSET2, starting with MIN, setting
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105 REGNUM to the register number and executing CODE for all registers that are
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106 set in both regsets. */
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107 #define EXECUTE_IF_AND_IN_REG_SET(REGSET1, REGSET2, MIN, REGNUM, RSI) \
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108 EXECUTE_IF_AND_IN_BITMAP (REGSET1, REGSET2, MIN, REGNUM, RSI) \
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109
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110 /* Same information as REGS_INVALIDATED_BY_CALL but in regset form to be used
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111 in dataflow more conveniently. */
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112
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113 extern regset regs_invalidated_by_call_regset;
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114
111
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115 /* Same information as FIXED_REG_SET but in regset form. */
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116 extern regset fixed_reg_set_regset;
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117
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diff changeset
118 /* An obstack for regsets. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
119 extern bitmap_obstack reg_obstack;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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120
111
kono
parents: 63
diff changeset
121 /* In df-core.c (which should use regset consistently instead of bitmap...) */
63
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
122 extern void dump_regset (regset, FILE *);
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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123
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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124 #endif /* GCC_REGSET_H */