[8833] | 1 | /* Sets (bit vectors) of hard registers, and operations on them. |
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| 2 | Copyright (C) 1987, 1992, 1994 Free Software Foundation, Inc. |
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| 3 | |
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| 4 | This file is part of GNU CC |
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| 5 | |
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| 6 | GNU CC is free software; you can redistribute it and/or modify |
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| 7 | it under the terms of the GNU General Public License as published by |
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| 8 | the Free Software Foundation; either version 2, or (at your option) |
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| 9 | any later version. |
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| 10 | |
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| 11 | GNU CC is distributed in the hope that it will be useful, |
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | GNU General Public License 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 GNU CC; see the file COPYING. If not, write to |
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| 18 | the Free Software Foundation, 59 Temple Place - Suite 330, |
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| 19 | Boston, MA 02111-1307, USA. */ |
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| 20 | |
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| 21 | |
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| 22 | /* Define the type of a set of hard registers. */ |
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| 23 | |
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| 24 | /* HARD_REG_ELT_TYPE is a typedef of the unsigned integral type which |
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| 25 | will be used for hard reg sets, either alone or in an array. |
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| 26 | |
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| 27 | If HARD_REG_SET is a macro, its definition is HARD_REG_ELT_TYPE, |
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| 28 | and it has enough bits to represent all the target machine's hard |
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| 29 | registers. Otherwise, it is a typedef for a suitably sized array |
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| 30 | of HARD_REG_ELT_TYPEs. HARD_REG_SET_LONGS is defined as how many. |
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| 31 | |
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| 32 | Note that lots of code assumes that the first part of a regset is |
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| 33 | the same format as a HARD_REG_SET. To help make sure this is true, |
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| 34 | we only try the widest integer mode (HOST_WIDE_INT) instead of all the |
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| 35 | smaller types. This approach loses only if there are a very few |
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| 36 | registers and then only in the few cases where we have an array of |
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| 37 | HARD_REG_SETs, so it needn't be as complex as it used to be. */ |
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| 38 | |
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| 39 | typedef unsigned HOST_WIDE_INT HARD_REG_ELT_TYPE; |
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| 40 | |
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| 41 | #if FIRST_PSEUDO_REGISTER <= HOST_BITS_PER_WIDE_INT |
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| 42 | |
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| 43 | #define HARD_REG_SET HARD_REG_ELT_TYPE |
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| 44 | |
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| 45 | #else |
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| 46 | |
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| 47 | #define HARD_REG_SET_LONGS \ |
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| 48 | ((FIRST_PSEUDO_REGISTER + HOST_BITS_PER_WIDE_INT - 1) \ |
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| 49 | / HOST_BITS_PER_WIDE_INT) |
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| 50 | typedef HARD_REG_ELT_TYPE HARD_REG_SET[HARD_REG_SET_LONGS]; |
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| 51 | |
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| 52 | #endif |
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| 53 | |
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| 54 | /* HARD_CONST is used to cast a constant to the appropriate type |
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| 55 | for use with a HARD_REG_SET. */ |
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| 56 | |
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| 57 | #define HARD_CONST(X) ((HARD_REG_ELT_TYPE) (X)) |
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| 58 | |
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| 59 | /* Define macros SET_HARD_REG_BIT, CLEAR_HARD_REG_BIT and TEST_HARD_REG_BIT |
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| 60 | to set, clear or test one bit in a hard reg set of type HARD_REG_SET. |
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| 61 | All three take two arguments: the set and the register number. |
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| 62 | |
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| 63 | In the case where sets are arrays of longs, the first argument |
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| 64 | is actually a pointer to a long. |
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| 65 | |
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| 66 | Define two macros for initializing a set: |
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| 67 | CLEAR_HARD_REG_SET and SET_HARD_REG_SET. |
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| 68 | These take just one argument. |
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| 69 | |
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| 70 | Also define macros for copying hard reg sets: |
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| 71 | COPY_HARD_REG_SET and COMPL_HARD_REG_SET. |
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| 72 | These take two arguments TO and FROM; they read from FROM |
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| 73 | and store into TO. COMPL_HARD_REG_SET complements each bit. |
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| 74 | |
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| 75 | Also define macros for combining hard reg sets: |
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| 76 | IOR_HARD_REG_SET and AND_HARD_REG_SET. |
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| 77 | These take two arguments TO and FROM; they read from FROM |
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| 78 | and combine bitwise into TO. Define also two variants |
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| 79 | IOR_COMPL_HARD_REG_SET and AND_COMPL_HARD_REG_SET |
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| 80 | which use the complement of the set FROM. |
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| 81 | |
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| 82 | Also define GO_IF_HARD_REG_SUBSET (X, Y, TO): |
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| 83 | if X is a subset of Y, go to TO. |
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| 84 | */ |
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| 85 | |
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| 86 | #ifdef HARD_REG_SET |
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| 87 | |
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| 88 | #define SET_HARD_REG_BIT(SET, BIT) \ |
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| 89 | ((SET) |= HARD_CONST (1) << (BIT)) |
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| 90 | #define CLEAR_HARD_REG_BIT(SET, BIT) \ |
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| 91 | ((SET) &= ~(HARD_CONST (1) << (BIT))) |
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| 92 | #define TEST_HARD_REG_BIT(SET, BIT) \ |
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| 93 | ((SET) & (HARD_CONST (1) << (BIT))) |
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| 94 | |
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| 95 | #define CLEAR_HARD_REG_SET(TO) ((TO) = HARD_CONST (0)) |
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| 96 | #define SET_HARD_REG_SET(TO) ((TO) = ~ HARD_CONST (0)) |
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| 97 | |
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| 98 | #define COPY_HARD_REG_SET(TO, FROM) ((TO) = (FROM)) |
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| 99 | #define COMPL_HARD_REG_SET(TO, FROM) ((TO) = ~(FROM)) |
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| 100 | |
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| 101 | #define IOR_HARD_REG_SET(TO, FROM) ((TO) |= (FROM)) |
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| 102 | #define IOR_COMPL_HARD_REG_SET(TO, FROM) ((TO) |= ~ (FROM)) |
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| 103 | #define AND_HARD_REG_SET(TO, FROM) ((TO) &= (FROM)) |
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| 104 | #define AND_COMPL_HARD_REG_SET(TO, FROM) ((TO) &= ~ (FROM)) |
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| 105 | |
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| 106 | #define GO_IF_HARD_REG_SUBSET(X,Y,TO) if (HARD_CONST (0) == ((X) & ~(Y))) goto TO |
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| 107 | |
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| 108 | #define GO_IF_HARD_REG_EQUAL(X,Y,TO) if ((X) == (Y)) goto TO |
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| 109 | |
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| 110 | #else |
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| 111 | |
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| 112 | #define UHOST_BITS_PER_WIDE_INT ((unsigned) HOST_BITS_PER_WIDE_INT) |
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| 113 | |
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| 114 | #define SET_HARD_REG_BIT(SET, BIT) \ |
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| 115 | ((SET)[(BIT) / UHOST_BITS_PER_WIDE_INT] \ |
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| 116 | |= HARD_CONST (1) << ((BIT) % UHOST_BITS_PER_WIDE_INT)) |
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| 117 | |
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| 118 | #define CLEAR_HARD_REG_BIT(SET, BIT) \ |
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| 119 | ((SET)[(BIT) / UHOST_BITS_PER_WIDE_INT] \ |
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| 120 | &= ~(HARD_CONST (1) << ((BIT) % UHOST_BITS_PER_WIDE_INT))) |
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| 121 | |
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| 122 | #define TEST_HARD_REG_BIT(SET, BIT) \ |
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| 123 | ((SET)[(BIT) / UHOST_BITS_PER_WIDE_INT] \ |
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| 124 | & (HARD_CONST (1) << ((BIT) % UHOST_BITS_PER_WIDE_INT))) |
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| 125 | |
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[11287] | 126 | #if FIRST_PSEUDO_REGISTER <= 2*HOST_BITS_PER_WIDE_INT |
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[8833] | 127 | #define CLEAR_HARD_REG_SET(TO) \ |
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| 128 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO); \ |
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[11287] | 129 | scan_tp_[0] = 0; \ |
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| 130 | scan_tp_[1] = 0; } while (0) |
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| 131 | |
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| 132 | #define SET_HARD_REG_SET(TO) \ |
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| 133 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO); \ |
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| 134 | scan_tp_[0] = -1; \ |
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| 135 | scan_tp_[1] = -1; } while (0) |
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| 136 | |
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| 137 | #define COPY_HARD_REG_SET(TO, FROM) \ |
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| 138 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 139 | scan_tp_[0] = scan_fp_[0]; \ |
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| 140 | scan_tp_[1] = scan_fp_[1]; } while (0) |
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| 141 | |
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| 142 | #define COMPL_HARD_REG_SET(TO, FROM) \ |
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| 143 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 144 | scan_tp_[0] = ~ scan_fp_[0]; \ |
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| 145 | scan_tp_[1] = ~ scan_fp_[1]; } while (0) |
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| 146 | |
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| 147 | #define AND_HARD_REG_SET(TO, FROM) \ |
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| 148 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 149 | scan_tp_[0] &= scan_fp_[0]; \ |
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| 150 | scan_tp_[1] &= scan_fp_[1]; } while (0) |
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| 151 | |
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| 152 | #define AND_COMPL_HARD_REG_SET(TO, FROM) \ |
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| 153 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 154 | scan_tp_[0] &= ~ scan_fp_[0]; \ |
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| 155 | scan_tp_[1] &= ~ scan_fp_[1]; } while (0) |
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| 156 | |
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| 157 | #define IOR_HARD_REG_SET(TO, FROM) \ |
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| 158 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 159 | scan_tp_[0] |= scan_fp_[0]; \ |
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| 160 | scan_tp_[1] |= scan_fp_[1]; } while (0) |
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| 161 | |
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| 162 | #define IOR_COMPL_HARD_REG_SET(TO, FROM) \ |
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| 163 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 164 | scan_tp_[0] |= ~ scan_fp_[0]; \ |
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| 165 | scan_tp_[1] |= ~ scan_fp_[1]; } while (0) |
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| 166 | |
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| 167 | #define GO_IF_HARD_REG_SUBSET(X,Y,TO) \ |
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| 168 | do { register HARD_REG_ELT_TYPE *scan_xp_ = (X), *scan_yp_ = (Y); \ |
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| 169 | if ((0 == (scan_xp_[0] & ~ scan_yp_[0])) \ |
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| 170 | && (0 == (scan_xp_[1] & ~ scan_yp_[1]))) \ |
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| 171 | goto TO; } while (0) |
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| 172 | |
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| 173 | #define GO_IF_HARD_REG_EQUAL(X,Y,TO) \ |
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| 174 | do { register HARD_REG_ELT_TYPE *scan_xp_ = (X), *scan_yp_ = (Y); \ |
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| 175 | if ((scan_xp_[0] == scan_yp_[0]) \ |
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| 176 | && (scan_xp_[1] == scan_yp_[1])) \ |
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| 177 | goto TO; } while (0) |
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| 178 | |
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| 179 | #else |
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| 180 | #if FIRST_PSEUDO_REGISTER <= 3*HOST_BITS_PER_WIDE_INT |
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| 181 | #define CLEAR_HARD_REG_SET(TO) \ |
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| 182 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO); \ |
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| 183 | scan_tp_[0] = 0; \ |
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| 184 | scan_tp_[1] = 0; \ |
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| 185 | scan_tp_[2] = 0; } while (0) |
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| 186 | |
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| 187 | #define SET_HARD_REG_SET(TO) \ |
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| 188 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO); \ |
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| 189 | scan_tp_[0] = -1; \ |
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| 190 | scan_tp_[1] = -1; \ |
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| 191 | scan_tp_[2] = -1; } while (0) |
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| 192 | |
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| 193 | #define COPY_HARD_REG_SET(TO, FROM) \ |
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| 194 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 195 | scan_tp_[0] = scan_fp_[0]; \ |
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| 196 | scan_tp_[1] = scan_fp_[1]; \ |
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| 197 | scan_tp_[2] = scan_fp_[2]; } while (0) |
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| 198 | |
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| 199 | #define COMPL_HARD_REG_SET(TO, FROM) \ |
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| 200 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 201 | scan_tp_[0] = ~ scan_fp_[0]; \ |
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| 202 | scan_tp_[1] = ~ scan_fp_[1]; \ |
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| 203 | scan_tp_[2] = ~ scan_fp_[2]; } while (0) |
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| 204 | |
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| 205 | #define AND_HARD_REG_SET(TO, FROM) \ |
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| 206 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 207 | scan_tp_[0] &= scan_fp_[0]; \ |
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| 208 | scan_tp_[1] &= scan_fp_[1]; \ |
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| 209 | scan_tp_[2] &= scan_fp_[2]; } while (0) |
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| 210 | |
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| 211 | #define AND_COMPL_HARD_REG_SET(TO, FROM) \ |
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| 212 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 213 | scan_tp_[0] &= ~ scan_fp_[0]; \ |
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| 214 | scan_tp_[1] &= ~ scan_fp_[1]; \ |
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| 215 | scan_tp_[2] &= ~ scan_fp_[2]; } while (0) |
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| 216 | |
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| 217 | #define IOR_HARD_REG_SET(TO, FROM) \ |
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| 218 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 219 | scan_tp_[0] |= scan_fp_[0]; \ |
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| 220 | scan_tp_[1] |= scan_fp_[1]; \ |
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| 221 | scan_tp_[2] |= scan_fp_[2]; } while (0) |
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| 222 | |
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| 223 | #define IOR_COMPL_HARD_REG_SET(TO, FROM) \ |
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| 224 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 225 | scan_tp_[0] |= ~ scan_fp_[0]; \ |
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| 226 | scan_tp_[1] |= ~ scan_fp_[1]; \ |
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| 227 | scan_tp_[2] |= ~ scan_fp_[2]; } while (0) |
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| 228 | |
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| 229 | #define GO_IF_HARD_REG_SUBSET(X,Y,TO) \ |
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| 230 | do { register HARD_REG_ELT_TYPE *scan_xp_ = (X), *scan_yp_ = (Y); \ |
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| 231 | if ((0 == (scan_xp_[0] & ~ scan_yp_[0])) \ |
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| 232 | && (0 == (scan_xp_[1] & ~ scan_yp_[1])) \ |
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| 233 | && (0 == (scan_xp_[2] & ~ scan_yp_[2]))) \ |
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| 234 | goto TO; } while (0) |
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| 235 | |
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| 236 | #define GO_IF_HARD_REG_EQUAL(X,Y,TO) \ |
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| 237 | do { register HARD_REG_ELT_TYPE *scan_xp_ = (X), *scan_yp_ = (Y); \ |
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| 238 | if ((scan_xp_[0] == scan_yp_[0]) \ |
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| 239 | && (scan_xp_[1] == scan_yp_[1]) \ |
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| 240 | && (scan_xp_[2] == scan_yp_[2])) \ |
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| 241 | goto TO; } while (0) |
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| 242 | |
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| 243 | #else |
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| 244 | #if FIRST_PSEUDO_REGISTER <= 4*HOST_BITS_PER_WIDE_INT |
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| 245 | #define CLEAR_HARD_REG_SET(TO) \ |
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| 246 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO); \ |
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| 247 | scan_tp_[0] = 0; \ |
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| 248 | scan_tp_[1] = 0; \ |
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| 249 | scan_tp_[2] = 0; \ |
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| 250 | scan_tp_[3] = 0; } while (0) |
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| 251 | |
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| 252 | #define SET_HARD_REG_SET(TO) \ |
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| 253 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO); \ |
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| 254 | scan_tp_[0] = -1; \ |
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| 255 | scan_tp_[1] = -1; \ |
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| 256 | scan_tp_[2] = -1; \ |
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| 257 | scan_tp_[3] = -1; } while (0) |
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| 258 | |
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| 259 | #define COPY_HARD_REG_SET(TO, FROM) \ |
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| 260 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 261 | scan_tp_[0] = scan_fp_[0]; \ |
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| 262 | scan_tp_[1] = scan_fp_[1]; \ |
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| 263 | scan_tp_[2] = scan_fp_[2]; \ |
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| 264 | scan_tp_[3] = scan_fp_[3]; } while (0) |
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| 265 | |
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| 266 | #define COMPL_HARD_REG_SET(TO, FROM) \ |
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| 267 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 268 | scan_tp_[0] = ~ scan_fp_[0]; \ |
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| 269 | scan_tp_[1] = ~ scan_fp_[1]; \ |
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| 270 | scan_tp_[2] = ~ scan_fp_[2]; \ |
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| 271 | scan_tp_[3] = ~ scan_fp_[3]; } while (0) |
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| 272 | |
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| 273 | #define AND_HARD_REG_SET(TO, FROM) \ |
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| 274 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 275 | scan_tp_[0] &= scan_fp_[0]; \ |
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| 276 | scan_tp_[1] &= scan_fp_[1]; \ |
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| 277 | scan_tp_[2] &= scan_fp_[2]; \ |
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| 278 | scan_tp_[3] &= scan_fp_[3]; } while (0) |
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| 279 | |
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| 280 | #define AND_COMPL_HARD_REG_SET(TO, FROM) \ |
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| 281 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 282 | scan_tp_[0] &= ~ scan_fp_[0]; \ |
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| 283 | scan_tp_[1] &= ~ scan_fp_[1]; \ |
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| 284 | scan_tp_[2] &= ~ scan_fp_[2]; \ |
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| 285 | scan_tp_[3] &= ~ scan_fp_[3]; } while (0) |
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| 286 | |
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| 287 | #define IOR_HARD_REG_SET(TO, FROM) \ |
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| 288 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 289 | scan_tp_[0] |= scan_fp_[0]; \ |
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| 290 | scan_tp_[1] |= scan_fp_[1]; \ |
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| 291 | scan_tp_[2] |= scan_fp_[2]; \ |
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| 292 | scan_tp_[3] |= scan_fp_[3]; } while (0) |
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| 293 | |
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| 294 | #define IOR_COMPL_HARD_REG_SET(TO, FROM) \ |
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| 295 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 296 | scan_tp_[0] |= ~ scan_fp_[0]; \ |
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| 297 | scan_tp_[1] |= ~ scan_fp_[1]; \ |
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| 298 | scan_tp_[2] |= ~ scan_fp_[2]; \ |
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| 299 | scan_tp_[3] |= ~ scan_fp_[3]; } while (0) |
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| 300 | |
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| 301 | #define GO_IF_HARD_REG_SUBSET(X,Y,TO) \ |
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| 302 | do { register HARD_REG_ELT_TYPE *scan_xp_ = (X), *scan_yp_ = (Y); \ |
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| 303 | if ((0 == (scan_xp_[0] & ~ scan_yp_[0])) \ |
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| 304 | && (0 == (scan_xp_[1] & ~ scan_yp_[1])) \ |
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| 305 | && (0 == (scan_xp_[2] & ~ scan_yp_[2])) \ |
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| 306 | && (0 == (scan_xp_[3] & ~ scan_yp_[3]))) \ |
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| 307 | goto TO; } while (0) |
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| 308 | |
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| 309 | #define GO_IF_HARD_REG_EQUAL(X,Y,TO) \ |
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| 310 | do { register HARD_REG_ELT_TYPE *scan_xp_ = (X), *scan_yp_ = (Y); \ |
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| 311 | if ((scan_xp_[0] == scan_yp_[0]) \ |
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| 312 | && (scan_xp_[1] == scan_yp_[1]) \ |
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| 313 | && (scan_xp_[2] == scan_yp_[2]) \ |
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| 314 | && (scan_xp_[3] == scan_yp_[3])) \ |
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| 315 | goto TO; } while (0) |
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| 316 | |
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| 317 | #else /* FIRST_PSEUDO_REGISTER > 3*HOST_BITS_PER_WIDE_INT */ |
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| 318 | |
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| 319 | #define CLEAR_HARD_REG_SET(TO) \ |
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| 320 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO); \ |
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[8833] | 321 | register int i; \ |
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| 322 | for (i = 0; i < HARD_REG_SET_LONGS; i++) \ |
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| 323 | *scan_tp_++ = 0; } while (0) |
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| 324 | |
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| 325 | #define SET_HARD_REG_SET(TO) \ |
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| 326 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO); \ |
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| 327 | register int i; \ |
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| 328 | for (i = 0; i < HARD_REG_SET_LONGS; i++) \ |
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| 329 | *scan_tp_++ = -1; } while (0) |
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| 330 | |
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| 331 | #define COPY_HARD_REG_SET(TO, FROM) \ |
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| 332 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 333 | register int i; \ |
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| 334 | for (i = 0; i < HARD_REG_SET_LONGS; i++) \ |
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| 335 | *scan_tp_++ = *scan_fp_++; } while (0) |
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| 336 | |
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| 337 | #define COMPL_HARD_REG_SET(TO, FROM) \ |
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| 338 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 339 | register int i; \ |
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| 340 | for (i = 0; i < HARD_REG_SET_LONGS; i++) \ |
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| 341 | *scan_tp_++ = ~ *scan_fp_++; } while (0) |
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| 342 | |
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| 343 | #define AND_HARD_REG_SET(TO, FROM) \ |
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| 344 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 345 | register int i; \ |
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| 346 | for (i = 0; i < HARD_REG_SET_LONGS; i++) \ |
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| 347 | *scan_tp_++ &= *scan_fp_++; } while (0) |
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| 348 | |
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| 349 | #define AND_COMPL_HARD_REG_SET(TO, FROM) \ |
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| 350 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 351 | register int i; \ |
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| 352 | for (i = 0; i < HARD_REG_SET_LONGS; i++) \ |
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| 353 | *scan_tp_++ &= ~ *scan_fp_++; } while (0) |
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| 354 | |
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| 355 | #define IOR_HARD_REG_SET(TO, FROM) \ |
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| 356 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 357 | register int i; \ |
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| 358 | for (i = 0; i < HARD_REG_SET_LONGS; i++) \ |
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| 359 | *scan_tp_++ |= *scan_fp_++; } while (0) |
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| 360 | |
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| 361 | #define IOR_COMPL_HARD_REG_SET(TO, FROM) \ |
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| 362 | do { register HARD_REG_ELT_TYPE *scan_tp_ = (TO), *scan_fp_ = (FROM); \ |
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| 363 | register int i; \ |
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| 364 | for (i = 0; i < HARD_REG_SET_LONGS; i++) \ |
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| 365 | *scan_tp_++ |= ~ *scan_fp_++; } while (0) |
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| 366 | |
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| 367 | #define GO_IF_HARD_REG_SUBSET(X,Y,TO) \ |
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| 368 | do { register HARD_REG_ELT_TYPE *scan_xp_ = (X), *scan_yp_ = (Y); \ |
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| 369 | register int i; \ |
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| 370 | for (i = 0; i < HARD_REG_SET_LONGS; i++) \ |
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| 371 | if (0 != (*scan_xp_++ & ~ *scan_yp_++)) break; \ |
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| 372 | if (i == HARD_REG_SET_LONGS) goto TO; } while (0) |
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| 373 | |
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| 374 | #define GO_IF_HARD_REG_EQUAL(X,Y,TO) \ |
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| 375 | do { register HARD_REG_ELT_TYPE *scan_xp_ = (X), *scan_yp_ = (Y); \ |
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| 376 | register int i; \ |
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| 377 | for (i = 0; i < HARD_REG_SET_LONGS; i++) \ |
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| 378 | if (*scan_xp_++ != *scan_yp_++) break; \ |
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| 379 | if (i == HARD_REG_SET_LONGS) goto TO; } while (0) |
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| 380 | |
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| 381 | #endif |
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[11287] | 382 | #endif |
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| 383 | #endif |
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| 384 | #endif |
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[8833] | 385 | |
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| 386 | /* Define some standard sets of registers. */ |
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| 387 | |
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| 388 | /* Indexed by hard register number, contains 1 for registers |
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| 389 | that are fixed use (stack pointer, pc, frame pointer, etc.). |
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| 390 | These are the registers that cannot be used to allocate |
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| 391 | a pseudo reg whose life does not cross calls. */ |
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| 392 | |
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| 393 | extern char fixed_regs[FIRST_PSEUDO_REGISTER]; |
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| 394 | |
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| 395 | /* The same info as a HARD_REG_SET. */ |
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| 396 | |
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| 397 | extern HARD_REG_SET fixed_reg_set; |
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| 398 | |
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| 399 | /* Indexed by hard register number, contains 1 for registers |
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| 400 | that are fixed use or are clobbered by function calls. |
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| 401 | These are the registers that cannot be used to allocate |
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| 402 | a pseudo reg whose life crosses calls. */ |
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| 403 | |
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| 404 | extern char call_used_regs[FIRST_PSEUDO_REGISTER]; |
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| 405 | |
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| 406 | /* The same info as a HARD_REG_SET. */ |
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| 407 | |
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| 408 | extern HARD_REG_SET call_used_reg_set; |
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| 409 | |
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[11287] | 410 | /* Registers that we don't want to caller save. */ |
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| 411 | extern HARD_REG_SET losing_caller_save_reg_set; |
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| 412 | |
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[8833] | 413 | /* Indexed by hard register number, contains 1 for registers that are |
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| 414 | fixed use -- i.e. in fixed_regs -- or a function value return register |
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| 415 | or STRUCT_VALUE_REGNUM or STATIC_CHAIN_REGNUM. These are the |
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| 416 | registers that cannot hold quantities across calls even if we are |
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| 417 | willing to save and restore them. */ |
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| 418 | |
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| 419 | extern char call_fixed_regs[FIRST_PSEUDO_REGISTER]; |
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| 420 | |
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| 421 | /* The same info as a HARD_REG_SET. */ |
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| 422 | |
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| 423 | extern HARD_REG_SET call_fixed_reg_set; |
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| 424 | |
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| 425 | /* Indexed by hard register number, contains 1 for registers |
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| 426 | that are being used for global register decls. |
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| 427 | These must be exempt from ordinary flow analysis |
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| 428 | and are also considered fixed. */ |
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| 429 | |
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| 430 | extern char global_regs[FIRST_PSEUDO_REGISTER]; |
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| 431 | |
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| 432 | /* Table of register numbers in the order in which to try to use them. */ |
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| 433 | |
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| 434 | #ifdef REG_ALLOC_ORDER /* Avoid undef symbol in certain broken linkers. */ |
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| 435 | extern int reg_alloc_order[FIRST_PSEUDO_REGISTER]; |
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| 436 | #endif |
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| 437 | |
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| 438 | /* For each reg class, a HARD_REG_SET saying which registers are in it. */ |
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| 439 | |
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| 440 | extern HARD_REG_SET reg_class_contents[]; |
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| 441 | |
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| 442 | /* For each reg class, number of regs it contains. */ |
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| 443 | |
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| 444 | extern int reg_class_size[N_REG_CLASSES]; |
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| 445 | |
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| 446 | /* For each reg class, table listing all the containing classes. */ |
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| 447 | |
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| 448 | extern enum reg_class reg_class_superclasses[N_REG_CLASSES][N_REG_CLASSES]; |
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| 449 | |
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| 450 | /* For each reg class, table listing all the classes contained in it. */ |
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| 451 | |
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| 452 | extern enum reg_class reg_class_subclasses[N_REG_CLASSES][N_REG_CLASSES]; |
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| 453 | |
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| 454 | /* For each pair of reg classes, |
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| 455 | a largest reg class contained in their union. */ |
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| 456 | |
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| 457 | extern enum reg_class reg_class_subunion[N_REG_CLASSES][N_REG_CLASSES]; |
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| 458 | |
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| 459 | /* For each pair of reg classes, |
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| 460 | the smallest reg class that contains their union. */ |
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| 461 | |
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| 462 | extern enum reg_class reg_class_superunion[N_REG_CLASSES][N_REG_CLASSES]; |
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| 463 | |
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| 464 | /* Number of non-fixed registers. */ |
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| 465 | |
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| 466 | extern int n_non_fixed_regs; |
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| 467 | |
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| 468 | /* Vector indexed by hardware reg giving its name. */ |
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| 469 | |
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| 470 | extern char *reg_names[FIRST_PSEUDO_REGISTER]; |
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