Mercurial > hg > CbC > CbC_gcc
annotate gcc/ira-conflicts.c @ 111:04ced10e8804
gcc 7
| author | kono |
|---|---|
| date | Fri, 27 Oct 2017 22:46:09 +0900 |
| parents | f6334be47118 |
| children | 84e7813d76e9 |
| rev | line source |
|---|---|
| 0 | 1 /* IRA conflict builder. |
| 111 | 2 Copyright (C) 2006-2017 Free Software Foundation, Inc. |
| 0 | 3 Contributed by Vladimir Makarov <vmakarov@redhat.com>. |
| 4 | |
| 5 This file is part of GCC. | |
| 6 | |
| 7 GCC is free software; you can redistribute it and/or modify it under | |
| 8 the terms of the GNU General Public License as published by the Free | |
| 9 Software Foundation; either version 3, or (at your option) any later | |
| 10 version. | |
| 11 | |
| 12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with GCC; see the file COPYING3. If not see | |
| 19 <http://www.gnu.org/licenses/>. */ | |
| 20 | |
| 21 #include "config.h" | |
| 22 #include "system.h" | |
| 23 #include "coretypes.h" | |
| 111 | 24 #include "backend.h" |
| 0 | 25 #include "target.h" |
| 111 | 26 #include "rtl.h" |
| 27 #include "predict.h" | |
| 28 #include "memmodel.h" | |
| 29 #include "tm_p.h" | |
| 0 | 30 #include "insn-config.h" |
| 111 | 31 #include "regs.h" |
| 32 #include "ira.h" | |
| 33 #include "ira-int.h" | |
| 0 | 34 #include "params.h" |
| 35 #include "sparseset.h" | |
| 36 #include "addresses.h" | |
| 37 | |
| 38 /* This file contains code responsible for allocno conflict creation, | |
| 39 allocno copy creation and allocno info accumulation on upper level | |
| 40 regions. */ | |
| 41 | |
| 42 /* ira_allocnos_num array of arrays of bits, recording whether two | |
| 43 allocno's conflict (can't go in the same hardware register). | |
| 44 | |
| 45 Some arrays will be used as conflict bit vector of the | |
|
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46 corresponding allocnos see function build_object_conflicts. */ |
| 0 | 47 static IRA_INT_TYPE **conflicts; |
| 48 | |
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49 /* Macro to test a conflict of C1 and C2 in `conflicts'. */ |
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50 #define OBJECTS_CONFLICT_P(C1, C2) \ |
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51 (OBJECT_MIN (C1) <= OBJECT_CONFLICT_ID (C2) \ |
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52 && OBJECT_CONFLICT_ID (C2) <= OBJECT_MAX (C1) \ |
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53 && TEST_MINMAX_SET_BIT (conflicts[OBJECT_CONFLICT_ID (C1)], \ |
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54 OBJECT_CONFLICT_ID (C2), \ |
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55 OBJECT_MIN (C1), OBJECT_MAX (C1))) |
| 0 | 56 |
| 57 | |
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58 /* Record a conflict between objects OBJ1 and OBJ2. If necessary, |
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59 canonicalize the conflict by recording it for lower-order subobjects |
| 111 | 60 of the corresponding allocnos. */ |
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61 static void |
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62 record_object_conflict (ira_object_t obj1, ira_object_t obj2) |
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63 { |
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64 ira_allocno_t a1 = OBJECT_ALLOCNO (obj1); |
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65 ira_allocno_t a2 = OBJECT_ALLOCNO (obj2); |
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66 int w1 = OBJECT_SUBWORD (obj1); |
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67 int w2 = OBJECT_SUBWORD (obj2); |
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68 int id1, id2; |
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69 |
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70 /* Canonicalize the conflict. If two identically-numbered words |
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71 conflict, always record this as a conflict between words 0. That |
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72 is the only information we need, and it is easier to test for if |
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73 it is collected in each allocno's lowest-order object. */ |
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74 if (w1 == w2 && w1 > 0) |
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75 { |
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76 obj1 = ALLOCNO_OBJECT (a1, 0); |
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77 obj2 = ALLOCNO_OBJECT (a2, 0); |
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78 } |
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79 id1 = OBJECT_CONFLICT_ID (obj1); |
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80 id2 = OBJECT_CONFLICT_ID (obj2); |
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81 |
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82 SET_MINMAX_SET_BIT (conflicts[id1], id2, OBJECT_MIN (obj1), |
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83 OBJECT_MAX (obj1)); |
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84 SET_MINMAX_SET_BIT (conflicts[id2], id1, OBJECT_MIN (obj2), |
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85 OBJECT_MAX (obj2)); |
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86 } |
| 0 | 87 |
| 88 /* Build allocno conflict table by processing allocno live ranges. | |
| 89 Return true if the table was built. The table is not built if it | |
| 90 is too big. */ | |
| 91 static bool | |
| 92 build_conflict_bit_table (void) | |
| 93 { | |
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94 int i; |
| 0 | 95 unsigned int j; |
| 111 | 96 enum reg_class aclass; |
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97 int object_set_words, allocated_words_num, conflict_bit_vec_words_num; |
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98 live_range_t r; |
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99 ira_allocno_t allocno; |
| 0 | 100 ira_allocno_iterator ai; |
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101 sparseset objects_live; |
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102 ira_object_t obj; |
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103 ira_allocno_object_iterator aoi; |
| 0 | 104 |
| 105 allocated_words_num = 0; | |
| 106 FOR_EACH_ALLOCNO (allocno, ai) | |
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107 FOR_EACH_ALLOCNO_OBJECT (allocno, obj, aoi) |
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108 { |
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109 if (OBJECT_MAX (obj) < OBJECT_MIN (obj)) |
| 0 | 110 continue; |
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111 conflict_bit_vec_words_num |
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112 = ((OBJECT_MAX (obj) - OBJECT_MIN (obj) + IRA_INT_BITS) |
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113 / IRA_INT_BITS); |
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114 allocated_words_num += conflict_bit_vec_words_num; |
| 111 | 115 if ((uint64_t) allocated_words_num * sizeof (IRA_INT_TYPE) |
| 116 > (uint64_t) IRA_MAX_CONFLICT_TABLE_SIZE * 1024 * 1024) | |
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117 { |
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118 if (internal_flag_ira_verbose > 0 && ira_dump_file != NULL) |
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119 fprintf |
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120 (ira_dump_file, |
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121 "+++Conflict table will be too big(>%dMB) -- don't use it\n", |
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122 IRA_MAX_CONFLICT_TABLE_SIZE); |
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123 return false; |
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124 } |
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125 } |
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126 |
| 0 | 127 conflicts = (IRA_INT_TYPE **) ira_allocate (sizeof (IRA_INT_TYPE *) |
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128 * ira_objects_num); |
| 0 | 129 allocated_words_num = 0; |
| 130 FOR_EACH_ALLOCNO (allocno, ai) | |
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131 FOR_EACH_ALLOCNO_OBJECT (allocno, obj, aoi) |
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132 { |
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133 int id = OBJECT_CONFLICT_ID (obj); |
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134 if (OBJECT_MAX (obj) < OBJECT_MIN (obj)) |
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135 { |
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136 conflicts[id] = NULL; |
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137 continue; |
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138 } |
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139 conflict_bit_vec_words_num |
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140 = ((OBJECT_MAX (obj) - OBJECT_MIN (obj) + IRA_INT_BITS) |
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141 / IRA_INT_BITS); |
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142 allocated_words_num += conflict_bit_vec_words_num; |
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143 conflicts[id] |
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144 = (IRA_INT_TYPE *) ira_allocate (sizeof (IRA_INT_TYPE) |
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145 * conflict_bit_vec_words_num); |
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146 memset (conflicts[id], 0, |
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147 sizeof (IRA_INT_TYPE) * conflict_bit_vec_words_num); |
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148 } |
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149 |
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150 object_set_words = (ira_objects_num + IRA_INT_BITS - 1) / IRA_INT_BITS; |
| 0 | 151 if (internal_flag_ira_verbose > 0 && ira_dump_file != NULL) |
| 152 fprintf | |
| 153 (ira_dump_file, | |
| 154 "+++Allocating %ld bytes for conflict table (uncompressed size %ld)\n", | |
| 155 (long) allocated_words_num * sizeof (IRA_INT_TYPE), | |
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156 (long) object_set_words * ira_objects_num * sizeof (IRA_INT_TYPE)); |
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157 |
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158 objects_live = sparseset_alloc (ira_objects_num); |
| 0 | 159 for (i = 0; i < ira_max_point; i++) |
| 160 { | |
| 161 for (r = ira_start_point_ranges[i]; r != NULL; r = r->start_next) | |
| 162 { | |
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163 ira_object_t obj = r->object; |
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164 ira_allocno_t allocno = OBJECT_ALLOCNO (obj); |
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165 int id = OBJECT_CONFLICT_ID (obj); |
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166 |
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167 gcc_assert (id < ira_objects_num); |
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168 |
| 111 | 169 aclass = ALLOCNO_CLASS (allocno); |
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170 EXECUTE_IF_SET_IN_SPARSESET (objects_live, j) |
| 0 | 171 { |
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172 ira_object_t live_obj = ira_object_id_map[j]; |
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173 ira_allocno_t live_a = OBJECT_ALLOCNO (live_obj); |
| 111 | 174 enum reg_class live_aclass = ALLOCNO_CLASS (live_a); |
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175 |
| 111 | 176 if (ira_reg_classes_intersect_p[aclass][live_aclass] |
| 0 | 177 /* Don't set up conflict for the allocno with itself. */ |
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178 && live_a != allocno) |
| 0 | 179 { |
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180 record_object_conflict (obj, live_obj); |
| 0 | 181 } |
| 182 } | |
| 111 | 183 sparseset_set_bit (objects_live, id); |
| 0 | 184 } |
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185 |
| 0 | 186 for (r = ira_finish_point_ranges[i]; r != NULL; r = r->finish_next) |
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187 sparseset_clear_bit (objects_live, OBJECT_CONFLICT_ID (r->object)); |
| 0 | 188 } |
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189 sparseset_free (objects_live); |
| 0 | 190 return true; |
| 191 } | |
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192 |
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193 /* Return true iff allocnos A1 and A2 cannot be allocated to the same |
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194 register due to conflicts. */ |
| 0 | 195 |
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196 static bool |
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197 allocnos_conflict_for_copy_p (ira_allocno_t a1, ira_allocno_t a2) |
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198 { |
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199 /* Due to the fact that we canonicalize conflicts (see |
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200 record_object_conflict), we only need to test for conflicts of |
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201 the lowest order words. */ |
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202 ira_object_t obj1 = ALLOCNO_OBJECT (a1, 0); |
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203 ira_object_t obj2 = ALLOCNO_OBJECT (a2, 0); |
| 111 | 204 |
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205 return OBJECTS_CONFLICT_P (obj1, obj2); |
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206 } |
| 0 | 207 |
| 208 /* Check that X is REG or SUBREG of REG. */ | |
| 209 #define REG_SUBREG_P(x) \ | |
| 210 (REG_P (x) || (GET_CODE (x) == SUBREG && REG_P (SUBREG_REG (x)))) | |
| 211 | |
| 212 /* Return X if X is a REG, otherwise it should be SUBREG of REG and | |
| 213 the function returns the reg in this case. *OFFSET will be set to | |
| 214 0 in the first case or the regno offset in the first case. */ | |
| 215 static rtx | |
| 216 go_through_subreg (rtx x, int *offset) | |
| 217 { | |
| 218 rtx reg; | |
| 219 | |
| 220 *offset = 0; | |
| 221 if (REG_P (x)) | |
| 222 return x; | |
| 223 ira_assert (GET_CODE (x) == SUBREG); | |
| 224 reg = SUBREG_REG (x); | |
| 225 ira_assert (REG_P (reg)); | |
| 226 if (REGNO (reg) < FIRST_PSEUDO_REGISTER) | |
| 227 *offset = subreg_regno_offset (REGNO (reg), GET_MODE (reg), | |
| 228 SUBREG_BYTE (x), GET_MODE (x)); | |
| 229 else | |
| 230 *offset = (SUBREG_BYTE (x) / REGMODE_NATURAL_SIZE (GET_MODE (x))); | |
| 231 return reg; | |
| 232 } | |
| 233 | |
| 234 /* Process registers REG1 and REG2 in move INSN with execution | |
| 235 frequency FREQ. The function also processes the registers in a | |
| 236 potential move insn (INSN == NULL in this case) with frequency | |
| 237 FREQ. The function can modify hard register costs of the | |
| 238 corresponding allocnos or create a copy involving the corresponding | |
| 239 allocnos. The function does nothing if the both registers are hard | |
| 240 registers. When nothing is changed, the function returns | |
| 241 FALSE. */ | |
| 242 static bool | |
| 243 process_regs_for_copy (rtx reg1, rtx reg2, bool constraint_p, | |
| 111 | 244 rtx_insn *insn, int freq) |
| 0 | 245 { |
| 246 int allocno_preferenced_hard_regno, cost, index, offset1, offset2; | |
| 247 bool only_regs_p; | |
| 248 ira_allocno_t a; | |
| 111 | 249 reg_class_t rclass, aclass; |
| 250 machine_mode mode; | |
| 0 | 251 ira_copy_t cp; |
| 252 | |
| 253 gcc_assert (REG_SUBREG_P (reg1) && REG_SUBREG_P (reg2)); | |
| 254 only_regs_p = REG_P (reg1) && REG_P (reg2); | |
| 255 reg1 = go_through_subreg (reg1, &offset1); | |
| 256 reg2 = go_through_subreg (reg2, &offset2); | |
| 257 /* Set up hard regno preferenced by allocno. If allocno gets the | |
| 258 hard regno the copy (or potential move) insn will be removed. */ | |
| 259 if (HARD_REGISTER_P (reg1)) | |
| 260 { | |
| 261 if (HARD_REGISTER_P (reg2)) | |
| 262 return false; | |
| 263 allocno_preferenced_hard_regno = REGNO (reg1) + offset1 - offset2; | |
| 264 a = ira_curr_regno_allocno_map[REGNO (reg2)]; | |
| 265 } | |
| 266 else if (HARD_REGISTER_P (reg2)) | |
| 267 { | |
| 268 allocno_preferenced_hard_regno = REGNO (reg2) + offset2 - offset1; | |
| 269 a = ira_curr_regno_allocno_map[REGNO (reg1)]; | |
| 270 } | |
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271 else |
| 0 | 272 { |
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273 ira_allocno_t a1 = ira_curr_regno_allocno_map[REGNO (reg1)]; |
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274 ira_allocno_t a2 = ira_curr_regno_allocno_map[REGNO (reg2)]; |
| 111 | 275 |
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276 if (!allocnos_conflict_for_copy_p (a1, a2) && offset1 == offset2) |
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277 { |
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278 cp = ira_add_allocno_copy (a1, a2, freq, constraint_p, insn, |
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279 ira_curr_loop_tree_node); |
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280 bitmap_set_bit (ira_curr_loop_tree_node->local_copies, cp->num); |
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281 return true; |
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282 } |
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283 else |
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284 return false; |
| 0 | 285 } |
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286 |
| 111 | 287 if (! IN_RANGE (allocno_preferenced_hard_regno, |
| 288 0, FIRST_PSEUDO_REGISTER - 1)) | |
| 0 | 289 /* Can not be tied. */ |
| 290 return false; | |
| 291 rclass = REGNO_REG_CLASS (allocno_preferenced_hard_regno); | |
| 292 mode = ALLOCNO_MODE (a); | |
| 111 | 293 aclass = ALLOCNO_CLASS (a); |
| 0 | 294 if (only_regs_p && insn != NULL_RTX |
| 111 | 295 && reg_class_size[rclass] <= ira_reg_class_max_nregs [rclass][mode]) |
| 0 | 296 /* It is already taken into account in ira-costs.c. */ |
| 297 return false; | |
| 111 | 298 index = ira_class_hard_reg_index[aclass][allocno_preferenced_hard_regno]; |
| 0 | 299 if (index < 0) |
| 111 | 300 /* Can not be tied. It is not in the allocno class. */ |
| 0 | 301 return false; |
| 111 | 302 ira_init_register_move_cost_if_necessary (mode); |
| 0 | 303 if (HARD_REGISTER_P (reg1)) |
| 111 | 304 cost = ira_register_move_cost[mode][aclass][rclass] * freq; |
| 0 | 305 else |
| 111 | 306 cost = ira_register_move_cost[mode][rclass][aclass] * freq; |
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307 do |
| 0 | 308 { |
| 309 ira_allocate_and_set_costs | |
| 111 | 310 (&ALLOCNO_HARD_REG_COSTS (a), aclass, |
| 311 ALLOCNO_CLASS_COST (a)); | |
| 0 | 312 ira_allocate_and_set_costs |
| 111 | 313 (&ALLOCNO_CONFLICT_HARD_REG_COSTS (a), aclass, 0); |
| 0 | 314 ALLOCNO_HARD_REG_COSTS (a)[index] -= cost; |
| 315 ALLOCNO_CONFLICT_HARD_REG_COSTS (a)[index] -= cost; | |
| 111 | 316 if (ALLOCNO_HARD_REG_COSTS (a)[index] < ALLOCNO_CLASS_COST (a)) |
| 317 ALLOCNO_CLASS_COST (a) = ALLOCNO_HARD_REG_COSTS (a)[index]; | |
| 318 ira_add_allocno_pref (a, allocno_preferenced_hard_regno, freq); | |
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319 a = ira_parent_or_cap_allocno (a); |
| 0 | 320 } |
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321 while (a != NULL); |
| 0 | 322 return true; |
| 323 } | |
| 324 | |
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325 /* Process all of the output registers of the current insn which are |
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326 not bound (BOUND_P) and the input register REG (its operand number |
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327 OP_NUM) which dies in the insn as if there were a move insn between |
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328 them with frequency FREQ. */ |
| 0 | 329 static void |
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330 process_reg_shuffles (rtx reg, int op_num, int freq, bool *bound_p) |
| 0 | 331 { |
| 332 int i; | |
| 333 rtx another_reg; | |
| 334 | |
| 335 gcc_assert (REG_SUBREG_P (reg)); | |
| 336 for (i = 0; i < recog_data.n_operands; i++) | |
| 337 { | |
| 338 another_reg = recog_data.operand[i]; | |
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339 |
| 0 | 340 if (!REG_SUBREG_P (another_reg) || op_num == i |
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341 || recog_data.operand_type[i] != OP_OUT |
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342 || bound_p[i]) |
| 0 | 343 continue; |
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344 |
| 111 | 345 process_regs_for_copy (reg, another_reg, false, NULL, freq); |
| 0 | 346 } |
| 347 } | |
| 348 | |
| 349 /* Process INSN and create allocno copies if necessary. For example, | |
| 350 it might be because INSN is a pseudo-register move or INSN is two | |
| 351 operand insn. */ | |
| 352 static void | |
| 111 | 353 add_insn_allocno_copies (rtx_insn *insn) |
| 0 | 354 { |
| 355 rtx set, operand, dup; | |
| 111 | 356 bool bound_p[MAX_RECOG_OPERANDS]; |
| 357 int i, n, freq; | |
| 358 HARD_REG_SET alts; | |
|
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359 |
| 0 | 360 freq = REG_FREQ_FROM_BB (BLOCK_FOR_INSN (insn)); |
| 361 if (freq == 0) | |
| 362 freq = 1; | |
| 363 if ((set = single_set (insn)) != NULL_RTX | |
| 364 && REG_SUBREG_P (SET_DEST (set)) && REG_SUBREG_P (SET_SRC (set)) | |
| 365 && ! side_effects_p (set) | |
| 366 && find_reg_note (insn, REG_DEAD, | |
| 367 REG_P (SET_SRC (set)) | |
| 368 ? SET_SRC (set) | |
| 369 : SUBREG_REG (SET_SRC (set))) != NULL_RTX) | |
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370 { |
| 111 | 371 process_regs_for_copy (SET_SRC (set), SET_DEST (set), |
| 372 false, insn, freq); | |
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373 return; |
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374 } |
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375 /* Fast check of possibility of constraint or shuffle copies. If |
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376 there are no dead registers, there will be no such copies. */ |
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377 if (! find_reg_note (insn, REG_DEAD, NULL_RTX)) |
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378 return; |
| 111 | 379 ira_setup_alts (insn, alts); |
|
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380 for (i = 0; i < recog_data.n_operands; i++) |
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381 bound_p[i] = false; |
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382 for (i = 0; i < recog_data.n_operands; i++) |
| 0 | 383 { |
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384 operand = recog_data.operand[i]; |
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385 if (! REG_SUBREG_P (operand)) |
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386 continue; |
| 111 | 387 if ((n = ira_get_dup_out_num (i, alts)) >= 0) |
| 388 { | |
| 389 bound_p[n] = true; | |
| 390 dup = recog_data.operand[n]; | |
| 391 if (REG_SUBREG_P (dup) | |
| 392 && find_reg_note (insn, REG_DEAD, | |
| 393 REG_P (operand) | |
| 394 ? operand | |
| 395 : SUBREG_REG (operand)) != NULL_RTX) | |
| 396 process_regs_for_copy (operand, dup, true, NULL, | |
| 397 freq); | |
| 398 } | |
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399 } |
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400 for (i = 0; i < recog_data.n_operands; i++) |
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401 { |
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402 operand = recog_data.operand[i]; |
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403 if (REG_SUBREG_P (operand) |
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404 && find_reg_note (insn, REG_DEAD, |
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405 REG_P (operand) |
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406 ? operand : SUBREG_REG (operand)) != NULL_RTX) |
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407 /* If an operand dies, prefer its hard register for the output |
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408 operands by decreasing the hard register cost or creating |
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409 the corresponding allocno copies. The cost will not |
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410 correspond to a real move insn cost, so make the frequency |
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411 smaller. */ |
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412 process_reg_shuffles (operand, i, freq < 8 ? 1 : freq / 8, bound_p); |
| 0 | 413 } |
| 414 } | |
| 415 | |
| 416 /* Add copies originated from BB given by LOOP_TREE_NODE. */ | |
| 417 static void | |
| 418 add_copies (ira_loop_tree_node_t loop_tree_node) | |
| 419 { | |
| 420 basic_block bb; | |
| 111 | 421 rtx_insn *insn; |
| 0 | 422 |
| 423 bb = loop_tree_node->bb; | |
| 424 if (bb == NULL) | |
| 425 return; | |
| 426 FOR_BB_INSNS (bb, insn) | |
|
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427 if (NONDEBUG_INSN_P (insn)) |
| 0 | 428 add_insn_allocno_copies (insn); |
| 429 } | |
| 430 | |
| 431 /* Propagate copies the corresponding allocnos on upper loop tree | |
| 432 level. */ | |
| 433 static void | |
| 434 propagate_copies (void) | |
| 435 { | |
| 436 ira_copy_t cp; | |
| 437 ira_copy_iterator ci; | |
| 438 ira_allocno_t a1, a2, parent_a1, parent_a2; | |
| 439 | |
| 440 FOR_EACH_COPY (cp, ci) | |
| 441 { | |
| 442 a1 = cp->first; | |
| 443 a2 = cp->second; | |
| 444 if (ALLOCNO_LOOP_TREE_NODE (a1) == ira_loop_tree_root) | |
| 445 continue; | |
| 446 ira_assert ((ALLOCNO_LOOP_TREE_NODE (a2) != ira_loop_tree_root)); | |
|
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447 parent_a1 = ira_parent_or_cap_allocno (a1); |
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448 parent_a2 = ira_parent_or_cap_allocno (a2); |
| 0 | 449 ira_assert (parent_a1 != NULL && parent_a2 != NULL); |
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450 if (! allocnos_conflict_for_copy_p (parent_a1, parent_a2)) |
| 0 | 451 ira_add_allocno_copy (parent_a1, parent_a2, cp->freq, |
| 452 cp->constraint_p, cp->insn, cp->loop_tree_node); | |
| 453 } | |
| 454 } | |
| 455 | |
| 456 /* Array used to collect all conflict allocnos for given allocno. */ | |
|
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457 static ira_object_t *collected_conflict_objects; |
| 0 | 458 |
| 459 /* Build conflict vectors or bit conflict vectors (whatever is more | |
|
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460 profitable) for object OBJ from the conflict table. */ |
| 0 | 461 static void |
|
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462 build_object_conflicts (ira_object_t obj) |
| 0 | 463 { |
| 464 int i, px, parent_num; | |
|
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465 ira_allocno_t parent_a, another_parent_a; |
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466 ira_object_t parent_obj; |
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467 ira_allocno_t a = OBJECT_ALLOCNO (obj); |
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468 IRA_INT_TYPE *object_conflicts; |
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469 minmax_set_iterator asi; |
| 111 | 470 int parent_min, parent_max ATTRIBUTE_UNUSED; |
| 0 | 471 |
|
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472 object_conflicts = conflicts[OBJECT_CONFLICT_ID (obj)]; |
| 0 | 473 px = 0; |
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474 FOR_EACH_BIT_IN_MINMAX_SET (object_conflicts, |
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475 OBJECT_MIN (obj), OBJECT_MAX (obj), i, asi) |
| 0 | 476 { |
|
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477 ira_object_t another_obj = ira_object_id_map[i]; |
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478 ira_allocno_t another_a = OBJECT_ALLOCNO (obj); |
| 111 | 479 |
| 0 | 480 ira_assert (ira_reg_classes_intersect_p |
| 111 | 481 [ALLOCNO_CLASS (a)][ALLOCNO_CLASS (another_a)]); |
|
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482 collected_conflict_objects[px++] = another_obj; |
| 0 | 483 } |
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484 if (ira_conflict_vector_profitable_p (obj, px)) |
| 0 | 485 { |
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486 ira_object_t *vec; |
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487 ira_allocate_conflict_vec (obj, px); |
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488 vec = OBJECT_CONFLICT_VEC (obj); |
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489 memcpy (vec, collected_conflict_objects, sizeof (ira_object_t) * px); |
| 0 | 490 vec[px] = NULL; |
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491 OBJECT_NUM_CONFLICTS (obj) = px; |
| 0 | 492 } |
| 493 else | |
| 494 { | |
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495 int conflict_bit_vec_words_num; |
| 111 | 496 |
|
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497 OBJECT_CONFLICT_ARRAY (obj) = object_conflicts; |
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498 if (OBJECT_MAX (obj) < OBJECT_MIN (obj)) |
| 0 | 499 conflict_bit_vec_words_num = 0; |
| 500 else | |
| 501 conflict_bit_vec_words_num | |
|
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502 = ((OBJECT_MAX (obj) - OBJECT_MIN (obj) + IRA_INT_BITS) |
| 0 | 503 / IRA_INT_BITS); |
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504 OBJECT_CONFLICT_ARRAY_SIZE (obj) |
| 0 | 505 = conflict_bit_vec_words_num * sizeof (IRA_INT_TYPE); |
| 506 } | |
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507 |
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508 parent_a = ira_parent_or_cap_allocno (a); |
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509 if (parent_a == NULL) |
| 0 | 510 return; |
| 111 | 511 ira_assert (ALLOCNO_CLASS (a) == ALLOCNO_CLASS (parent_a)); |
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512 ira_assert (ALLOCNO_NUM_OBJECTS (a) == ALLOCNO_NUM_OBJECTS (parent_a)); |
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513 parent_obj = ALLOCNO_OBJECT (parent_a, OBJECT_SUBWORD (obj)); |
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514 parent_num = OBJECT_CONFLICT_ID (parent_obj); |
| 111 | 515 parent_min = OBJECT_MIN (parent_obj); |
| 516 parent_max = OBJECT_MAX (parent_obj); | |
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517 FOR_EACH_BIT_IN_MINMAX_SET (object_conflicts, |
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518 OBJECT_MIN (obj), OBJECT_MAX (obj), i, asi) |
| 0 | 519 { |
|
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520 ira_object_t another_obj = ira_object_id_map[i]; |
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521 ira_allocno_t another_a = OBJECT_ALLOCNO (another_obj); |
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522 int another_word = OBJECT_SUBWORD (another_obj); |
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523 |
| 0 | 524 ira_assert (ira_reg_classes_intersect_p |
| 111 | 525 [ALLOCNO_CLASS (a)][ALLOCNO_CLASS (another_a)]); |
|
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526 |
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527 another_parent_a = ira_parent_or_cap_allocno (another_a); |
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528 if (another_parent_a == NULL) |
| 0 | 529 continue; |
| 530 ira_assert (ALLOCNO_NUM (another_parent_a) >= 0); | |
| 111 | 531 ira_assert (ALLOCNO_CLASS (another_a) |
| 532 == ALLOCNO_CLASS (another_parent_a)); | |
|
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533 ira_assert (ALLOCNO_NUM_OBJECTS (another_a) |
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534 == ALLOCNO_NUM_OBJECTS (another_parent_a)); |
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535 SET_MINMAX_SET_BIT (conflicts[parent_num], |
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536 OBJECT_CONFLICT_ID (ALLOCNO_OBJECT (another_parent_a, |
| 111 | 537 another_word)), |
| 538 parent_min, parent_max); | |
| 0 | 539 } |
| 540 } | |
| 541 | |
| 542 /* Build conflict vectors or bit conflict vectors (whatever is more | |
| 543 profitable) of all allocnos from the conflict table. */ | |
| 544 static void | |
| 545 build_conflicts (void) | |
| 546 { | |
| 547 int i; | |
| 548 ira_allocno_t a, cap; | |
| 549 | |
|
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550 collected_conflict_objects |
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551 = (ira_object_t *) ira_allocate (sizeof (ira_object_t) |
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552 * ira_objects_num); |
| 0 | 553 for (i = max_reg_num () - 1; i >= FIRST_PSEUDO_REGISTER; i--) |
| 554 for (a = ira_regno_allocno_map[i]; | |
| 555 a != NULL; | |
| 556 a = ALLOCNO_NEXT_REGNO_ALLOCNO (a)) | |
| 557 { | |
|
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558 int j, nregs = ALLOCNO_NUM_OBJECTS (a); |
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559 for (j = 0; j < nregs; j++) |
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560 { |
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561 ira_object_t obj = ALLOCNO_OBJECT (a, j); |
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562 build_object_conflicts (obj); |
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563 for (cap = ALLOCNO_CAP (a); cap != NULL; cap = ALLOCNO_CAP (cap)) |
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564 { |
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565 ira_object_t cap_obj = ALLOCNO_OBJECT (cap, j); |
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566 gcc_assert (ALLOCNO_NUM_OBJECTS (cap) == ALLOCNO_NUM_OBJECTS (a)); |
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567 build_object_conflicts (cap_obj); |
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568 } |
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569 } |
| 0 | 570 } |
|
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571 ira_free (collected_conflict_objects); |
| 0 | 572 } |
| 573 | |
| 574 | |
| 575 | |
| 576 /* Print hard reg set SET with TITLE to FILE. */ | |
| 577 static void | |
| 578 print_hard_reg_set (FILE *file, const char *title, HARD_REG_SET set) | |
| 579 { | |
| 580 int i, start; | |
| 581 | |
|
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582 fputs (title, file); |
| 0 | 583 for (start = -1, i = 0; i < FIRST_PSEUDO_REGISTER; i++) |
| 584 { | |
| 585 if (TEST_HARD_REG_BIT (set, i)) | |
| 586 { | |
| 587 if (i == 0 || ! TEST_HARD_REG_BIT (set, i - 1)) | |
| 588 start = i; | |
| 589 } | |
| 590 if (start >= 0 | |
| 591 && (i == FIRST_PSEUDO_REGISTER - 1 || ! TEST_HARD_REG_BIT (set, i))) | |
| 592 { | |
| 593 if (start == i - 1) | |
| 594 fprintf (file, " %d", start); | |
| 595 else if (start == i - 2) | |
| 596 fprintf (file, " %d %d", start, start + 1); | |
| 597 else | |
| 598 fprintf (file, " %d-%d", start, i - 1); | |
| 599 start = -1; | |
| 600 } | |
| 601 } | |
|
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602 putc ('\n', file); |
| 0 | 603 } |
| 604 | |
|
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605 static void |
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606 print_allocno_conflicts (FILE * file, bool reg_p, ira_allocno_t a) |
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607 { |
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608 HARD_REG_SET conflicting_hard_regs; |
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609 basic_block bb; |
|
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610 int n, i; |
|
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611 |
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612 if (reg_p) |
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613 fprintf (file, ";; r%d", ALLOCNO_REGNO (a)); |
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614 else |
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615 { |
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616 fprintf (file, ";; a%d(r%d,", ALLOCNO_NUM (a), ALLOCNO_REGNO (a)); |
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617 if ((bb = ALLOCNO_LOOP_TREE_NODE (a)->bb) != NULL) |
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618 fprintf (file, "b%d", bb->index); |
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619 else |
| 111 | 620 fprintf (file, "l%d", ALLOCNO_LOOP_TREE_NODE (a)->loop_num); |
|
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621 putc (')', file); |
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622 } |
|
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623 |
|
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624 fputs (" conflicts:", file); |
|
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625 n = ALLOCNO_NUM_OBJECTS (a); |
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626 for (i = 0; i < n; i++) |
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627 { |
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628 ira_object_t obj = ALLOCNO_OBJECT (a, i); |
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629 ira_object_t conflict_obj; |
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630 ira_object_conflict_iterator oci; |
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631 |
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632 if (OBJECT_CONFLICT_ARRAY (obj) == NULL) |
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633 continue; |
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634 if (n > 1) |
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635 fprintf (file, "\n;; subobject %d:", i); |
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636 FOR_EACH_OBJECT_CONFLICT (obj, conflict_obj, oci) |
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637 { |
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638 ira_allocno_t conflict_a = OBJECT_ALLOCNO (conflict_obj); |
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639 if (reg_p) |
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640 fprintf (file, " r%d,", ALLOCNO_REGNO (conflict_a)); |
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641 else |
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642 { |
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643 fprintf (file, " a%d(r%d", ALLOCNO_NUM (conflict_a), |
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644 ALLOCNO_REGNO (conflict_a)); |
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645 if (ALLOCNO_NUM_OBJECTS (conflict_a) > 1) |
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646 fprintf (file, ",w%d", OBJECT_SUBWORD (conflict_obj)); |
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647 if ((bb = ALLOCNO_LOOP_TREE_NODE (conflict_a)->bb) != NULL) |
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648 fprintf (file, ",b%d", bb->index); |
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649 else |
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650 fprintf (file, ",l%d", |
| 111 | 651 ALLOCNO_LOOP_TREE_NODE (conflict_a)->loop_num); |
|
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652 putc (')', file); |
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653 } |
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654 } |
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655 COPY_HARD_REG_SET (conflicting_hard_regs, OBJECT_TOTAL_CONFLICT_HARD_REGS (obj)); |
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656 AND_COMPL_HARD_REG_SET (conflicting_hard_regs, ira_no_alloc_regs); |
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657 AND_HARD_REG_SET (conflicting_hard_regs, |
| 111 | 658 reg_class_contents[ALLOCNO_CLASS (a)]); |
|
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659 print_hard_reg_set (file, "\n;; total conflict hard regs:", |
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660 conflicting_hard_regs); |
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661 |
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662 COPY_HARD_REG_SET (conflicting_hard_regs, OBJECT_CONFLICT_HARD_REGS (obj)); |
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663 AND_COMPL_HARD_REG_SET (conflicting_hard_regs, ira_no_alloc_regs); |
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664 AND_HARD_REG_SET (conflicting_hard_regs, |
| 111 | 665 reg_class_contents[ALLOCNO_CLASS (a)]); |
|
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666 print_hard_reg_set (file, ";; conflict hard regs:", |
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667 conflicting_hard_regs); |
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668 putc ('\n', file); |
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669 } |
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670 |
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671 } |
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672 |
| 0 | 673 /* Print information about allocno or only regno (if REG_P) conflicts |
| 674 to FILE. */ | |
| 675 static void | |
| 676 print_conflicts (FILE *file, bool reg_p) | |
| 677 { | |
| 678 ira_allocno_t a; | |
| 679 ira_allocno_iterator ai; | |
| 680 | |
| 681 FOR_EACH_ALLOCNO (a, ai) | |
|
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682 print_allocno_conflicts (file, reg_p, a); |
| 0 | 683 } |
| 684 | |
| 685 /* Print information about allocno or only regno (if REG_P) conflicts | |
| 686 to stderr. */ | |
| 687 void | |
| 688 ira_debug_conflicts (bool reg_p) | |
| 689 { | |
| 690 print_conflicts (stderr, reg_p); | |
| 691 } | |
| 692 | |
| 693 | |
| 694 | |
| 695 /* Entry function which builds allocno conflicts and allocno copies | |
| 696 and accumulate some allocno info on upper level regions. */ | |
| 697 void | |
| 698 ira_build_conflicts (void) | |
| 699 { | |
| 111 | 700 enum reg_class base; |
| 0 | 701 ira_allocno_t a; |
| 702 ira_allocno_iterator ai; | |
| 703 HARD_REG_SET temp_hard_reg_set; | |
| 704 | |
| 705 if (ira_conflicts_p) | |
| 706 { | |
| 707 ira_conflicts_p = build_conflict_bit_table (); | |
| 708 if (ira_conflicts_p) | |
| 709 { | |
|
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710 ira_object_t obj; |
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711 ira_object_iterator oi; |
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712 |
| 0 | 713 build_conflicts (); |
| 111 | 714 ira_traverse_loop_tree (true, ira_loop_tree_root, add_copies, NULL); |
| 0 | 715 /* We need finished conflict table for the subsequent call. */ |
| 716 if (flag_ira_region == IRA_REGION_ALL | |
| 717 || flag_ira_region == IRA_REGION_MIXED) | |
| 718 propagate_copies (); | |
|
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719 |
| 0 | 720 /* Now we can free memory for the conflict table (see function |
|
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721 build_object_conflicts for details). */ |
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722 FOR_EACH_OBJECT (obj, oi) |
| 0 | 723 { |
|
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724 if (OBJECT_CONFLICT_ARRAY (obj) != conflicts[OBJECT_CONFLICT_ID (obj)]) |
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725 ira_free (conflicts[OBJECT_CONFLICT_ID (obj)]); |
| 0 | 726 } |
| 727 ira_free (conflicts); | |
| 728 } | |
| 729 } | |
| 111 | 730 base = base_reg_class (VOIDmode, ADDR_SPACE_GENERIC, ADDRESS, SCRATCH); |
| 731 if (! targetm.class_likely_spilled_p (base)) | |
| 0 | 732 CLEAR_HARD_REG_SET (temp_hard_reg_set); |
| 733 else | |
| 734 { | |
| 111 | 735 COPY_HARD_REG_SET (temp_hard_reg_set, reg_class_contents[base]); |
| 0 | 736 AND_COMPL_HARD_REG_SET (temp_hard_reg_set, ira_no_alloc_regs); |
| 737 AND_HARD_REG_SET (temp_hard_reg_set, call_used_reg_set); | |
| 738 } | |
| 739 FOR_EACH_ALLOCNO (a, ai) | |
| 740 { | |
|
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741 int i, n = ALLOCNO_NUM_OBJECTS (a); |
| 111 | 742 |
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743 for (i = 0; i < n; i++) |
| 0 | 744 { |
|
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745 ira_object_t obj = ALLOCNO_OBJECT (a, i); |
| 111 | 746 machine_mode obj_mode = obj->allocno->mode; |
| 747 rtx allocno_reg = regno_reg_rtx [ALLOCNO_REGNO (a)]; | |
|
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748 |
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749 if ((! flag_caller_saves && ALLOCNO_CALLS_CROSSED_NUM (a) != 0) |
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750 /* For debugging purposes don't put user defined variables in |
| 111 | 751 callee-clobbered registers. However, do allow parameters |
| 752 in callee-clobbered registers to improve debugging. This | |
| 753 is a bit of a fragile hack. */ | |
|
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754 || (optimize == 0 |
| 111 | 755 && REG_USERVAR_P (allocno_reg) |
| 756 && ! reg_is_parm_p (allocno_reg))) | |
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757 { |
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758 IOR_HARD_REG_SET (OBJECT_TOTAL_CONFLICT_HARD_REGS (obj), |
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759 call_used_reg_set); |
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760 IOR_HARD_REG_SET (OBJECT_CONFLICT_HARD_REGS (obj), |
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761 call_used_reg_set); |
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762 } |
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763 else if (ALLOCNO_CALLS_CROSSED_NUM (a) != 0) |
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764 { |
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765 IOR_HARD_REG_SET (OBJECT_TOTAL_CONFLICT_HARD_REGS (obj), |
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766 no_caller_save_reg_set); |
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767 IOR_HARD_REG_SET (OBJECT_TOTAL_CONFLICT_HARD_REGS (obj), |
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768 temp_hard_reg_set); |
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769 IOR_HARD_REG_SET (OBJECT_CONFLICT_HARD_REGS (obj), |
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770 no_caller_save_reg_set); |
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771 IOR_HARD_REG_SET (OBJECT_CONFLICT_HARD_REGS (obj), |
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772 temp_hard_reg_set); |
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773 } |
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774 |
| 111 | 775 /* Now we deal with paradoxical subreg cases where certain registers |
| 776 cannot be accessed in the widest mode. */ | |
| 777 machine_mode outer_mode = ALLOCNO_WMODE (a); | |
| 778 machine_mode inner_mode = ALLOCNO_MODE (a); | |
| 779 if (paradoxical_subreg_p (outer_mode, inner_mode)) | |
| 780 { | |
| 781 enum reg_class aclass = ALLOCNO_CLASS (a); | |
| 782 for (int j = ira_class_hard_regs_num[aclass] - 1; j >= 0; --j) | |
| 783 { | |
| 784 int inner_regno = ira_class_hard_regs[aclass][j]; | |
| 785 int outer_regno = simplify_subreg_regno (inner_regno, | |
| 786 inner_mode, 0, | |
| 787 outer_mode); | |
| 788 if (outer_regno < 0 | |
| 789 || !in_hard_reg_set_p (reg_class_contents[aclass], | |
| 790 outer_mode, outer_regno)) | |
| 791 { | |
| 792 SET_HARD_REG_BIT (OBJECT_TOTAL_CONFLICT_HARD_REGS (obj), | |
| 793 inner_regno); | |
| 794 SET_HARD_REG_BIT (OBJECT_CONFLICT_HARD_REGS (obj), | |
| 795 inner_regno); | |
| 796 } | |
| 797 } | |
| 798 } | |
| 799 | |
|
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800 if (ALLOCNO_CALLS_CROSSED_NUM (a) != 0) |
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801 { |
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802 int regno; |
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803 |
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804 /* Allocnos bigger than the saved part of call saved |
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805 regs must conflict with them. */ |
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806 for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) |
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807 if (!TEST_HARD_REG_BIT (call_used_reg_set, regno) |
| 111 | 808 && targetm.hard_regno_call_part_clobbered (regno, |
| 809 obj_mode)) | |
|
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810 { |
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811 SET_HARD_REG_BIT (OBJECT_CONFLICT_HARD_REGS (obj), regno); |
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812 SET_HARD_REG_BIT (OBJECT_TOTAL_CONFLICT_HARD_REGS (obj), |
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813 regno); |
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814 } |
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815 } |
| 0 | 816 } |
| 817 } | |
| 818 if (optimize && ira_conflicts_p | |
| 819 && internal_flag_ira_verbose > 2 && ira_dump_file != NULL) | |
| 820 print_conflicts (ira_dump_file, false); | |
| 821 } |