Mercurial > hg > CbC > CbC_gcc
annotate gcc/ira-conflicts.c @ 145:1830386684a0
gcc-9.2.0
| author | anatofuz |
|---|---|
| date | Thu, 13 Feb 2020 11:34:05 +0900 |
| parents | 84e7813d76e9 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* IRA conflict builder. |
| 145 | 2 Copyright (C) 2006-2020 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 "sparseset.h" |
| 35 #include "addresses.h" | |
| 36 | |
| 37 /* This file contains code responsible for allocno conflict creation, | |
| 38 allocno copy creation and allocno info accumulation on upper level | |
| 39 regions. */ | |
| 40 | |
| 41 /* ira_allocnos_num array of arrays of bits, recording whether two | |
| 42 allocno's conflict (can't go in the same hardware register). | |
| 43 | |
| 44 Some arrays will be used as conflict bit vector of the | |
|
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45 corresponding allocnos see function build_object_conflicts. */ |
| 0 | 46 static IRA_INT_TYPE **conflicts; |
| 47 | |
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48 /* Macro to test a conflict of C1 and C2 in `conflicts'. */ |
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49 #define OBJECTS_CONFLICT_P(C1, C2) \ |
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50 (OBJECT_MIN (C1) <= OBJECT_CONFLICT_ID (C2) \ |
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51 && OBJECT_CONFLICT_ID (C2) <= OBJECT_MAX (C1) \ |
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52 && TEST_MINMAX_SET_BIT (conflicts[OBJECT_CONFLICT_ID (C1)], \ |
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53 OBJECT_CONFLICT_ID (C2), \ |
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54 OBJECT_MIN (C1), OBJECT_MAX (C1))) |
| 0 | 55 |
| 56 | |
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57 /* Record a conflict between objects OBJ1 and OBJ2. If necessary, |
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58 canonicalize the conflict by recording it for lower-order subobjects |
| 111 | 59 of the corresponding allocnos. */ |
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60 static void |
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61 record_object_conflict (ira_object_t obj1, ira_object_t obj2) |
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62 { |
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63 ira_allocno_t a1 = OBJECT_ALLOCNO (obj1); |
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64 ira_allocno_t a2 = OBJECT_ALLOCNO (obj2); |
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65 int w1 = OBJECT_SUBWORD (obj1); |
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66 int w2 = OBJECT_SUBWORD (obj2); |
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67 int id1, id2; |
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68 |
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69 /* Canonicalize the conflict. If two identically-numbered words |
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70 conflict, always record this as a conflict between words 0. That |
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71 is the only information we need, and it is easier to test for if |
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72 it is collected in each allocno's lowest-order object. */ |
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73 if (w1 == w2 && w1 > 0) |
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74 { |
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75 obj1 = ALLOCNO_OBJECT (a1, 0); |
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76 obj2 = ALLOCNO_OBJECT (a2, 0); |
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77 } |
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78 id1 = OBJECT_CONFLICT_ID (obj1); |
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79 id2 = OBJECT_CONFLICT_ID (obj2); |
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80 |
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81 SET_MINMAX_SET_BIT (conflicts[id1], id2, OBJECT_MIN (obj1), |
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82 OBJECT_MAX (obj1)); |
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83 SET_MINMAX_SET_BIT (conflicts[id2], id1, OBJECT_MIN (obj2), |
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84 OBJECT_MAX (obj2)); |
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85 } |
| 0 | 86 |
| 87 /* Build allocno conflict table by processing allocno live ranges. | |
| 88 Return true if the table was built. The table is not built if it | |
| 89 is too big. */ | |
| 90 static bool | |
| 91 build_conflict_bit_table (void) | |
| 92 { | |
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93 int i; |
| 0 | 94 unsigned int j; |
| 111 | 95 enum reg_class aclass; |
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96 int object_set_words, allocated_words_num, conflict_bit_vec_words_num; |
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97 live_range_t r; |
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98 ira_allocno_t allocno; |
| 0 | 99 ira_allocno_iterator ai; |
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100 sparseset objects_live; |
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101 ira_object_t obj; |
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102 ira_allocno_object_iterator aoi; |
| 0 | 103 |
| 104 allocated_words_num = 0; | |
| 105 FOR_EACH_ALLOCNO (allocno, ai) | |
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106 FOR_EACH_ALLOCNO_OBJECT (allocno, obj, aoi) |
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107 { |
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108 if (OBJECT_MAX (obj) < OBJECT_MIN (obj)) |
| 0 | 109 continue; |
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110 conflict_bit_vec_words_num |
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111 = ((OBJECT_MAX (obj) - OBJECT_MIN (obj) + IRA_INT_BITS) |
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112 / IRA_INT_BITS); |
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113 allocated_words_num += conflict_bit_vec_words_num; |
| 111 | 114 if ((uint64_t) allocated_words_num * sizeof (IRA_INT_TYPE) |
| 145 | 115 > (uint64_t) param_ira_max_conflict_table_size * 1024 * 1024) |
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116 { |
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117 if (internal_flag_ira_verbose > 0 && ira_dump_file != NULL) |
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118 fprintf |
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119 (ira_dump_file, |
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120 "+++Conflict table will be too big(>%dMB) -- don't use it\n", |
| 145 | 121 param_ira_max_conflict_table_size); |
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122 return false; |
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123 } |
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124 } |
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125 |
| 0 | 126 conflicts = (IRA_INT_TYPE **) ira_allocate (sizeof (IRA_INT_TYPE *) |
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127 * ira_objects_num); |
| 0 | 128 allocated_words_num = 0; |
| 129 FOR_EACH_ALLOCNO (allocno, ai) | |
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130 FOR_EACH_ALLOCNO_OBJECT (allocno, obj, aoi) |
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131 { |
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132 int id = OBJECT_CONFLICT_ID (obj); |
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133 if (OBJECT_MAX (obj) < OBJECT_MIN (obj)) |
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134 { |
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135 conflicts[id] = NULL; |
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136 continue; |
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137 } |
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138 conflict_bit_vec_words_num |
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139 = ((OBJECT_MAX (obj) - OBJECT_MIN (obj) + IRA_INT_BITS) |
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140 / IRA_INT_BITS); |
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141 allocated_words_num += conflict_bit_vec_words_num; |
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142 conflicts[id] |
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143 = (IRA_INT_TYPE *) ira_allocate (sizeof (IRA_INT_TYPE) |
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144 * conflict_bit_vec_words_num); |
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145 memset (conflicts[id], 0, |
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146 sizeof (IRA_INT_TYPE) * conflict_bit_vec_words_num); |
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147 } |
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148 |
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149 object_set_words = (ira_objects_num + IRA_INT_BITS - 1) / IRA_INT_BITS; |
| 0 | 150 if (internal_flag_ira_verbose > 0 && ira_dump_file != NULL) |
| 151 fprintf | |
| 152 (ira_dump_file, | |
| 153 "+++Allocating %ld bytes for conflict table (uncompressed size %ld)\n", | |
| 154 (long) allocated_words_num * sizeof (IRA_INT_TYPE), | |
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155 (long) object_set_words * ira_objects_num * sizeof (IRA_INT_TYPE)); |
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156 |
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157 objects_live = sparseset_alloc (ira_objects_num); |
| 0 | 158 for (i = 0; i < ira_max_point; i++) |
| 159 { | |
| 160 for (r = ira_start_point_ranges[i]; r != NULL; r = r->start_next) | |
| 161 { | |
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162 ira_object_t obj = r->object; |
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163 ira_allocno_t allocno = OBJECT_ALLOCNO (obj); |
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164 int id = OBJECT_CONFLICT_ID (obj); |
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165 |
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166 gcc_assert (id < ira_objects_num); |
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167 |
| 111 | 168 aclass = ALLOCNO_CLASS (allocno); |
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169 EXECUTE_IF_SET_IN_SPARSESET (objects_live, j) |
| 0 | 170 { |
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171 ira_object_t live_obj = ira_object_id_map[j]; |
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172 ira_allocno_t live_a = OBJECT_ALLOCNO (live_obj); |
| 111 | 173 enum reg_class live_aclass = ALLOCNO_CLASS (live_a); |
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174 |
| 111 | 175 if (ira_reg_classes_intersect_p[aclass][live_aclass] |
| 0 | 176 /* Don't set up conflict for the allocno with itself. */ |
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177 && live_a != allocno) |
| 0 | 178 { |
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179 record_object_conflict (obj, live_obj); |
| 0 | 180 } |
| 181 } | |
| 111 | 182 sparseset_set_bit (objects_live, id); |
| 0 | 183 } |
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184 |
| 0 | 185 for (r = ira_finish_point_ranges[i]; r != NULL; r = r->finish_next) |
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186 sparseset_clear_bit (objects_live, OBJECT_CONFLICT_ID (r->object)); |
| 0 | 187 } |
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188 sparseset_free (objects_live); |
| 0 | 189 return true; |
| 190 } | |
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191 |
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192 /* Return true iff allocnos A1 and A2 cannot be allocated to the same |
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193 register due to conflicts. */ |
| 0 | 194 |
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195 static bool |
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196 allocnos_conflict_for_copy_p (ira_allocno_t a1, ira_allocno_t a2) |
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197 { |
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198 /* Due to the fact that we canonicalize conflicts (see |
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199 record_object_conflict), we only need to test for conflicts of |
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200 the lowest order words. */ |
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201 ira_object_t obj1 = ALLOCNO_OBJECT (a1, 0); |
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202 ira_object_t obj2 = ALLOCNO_OBJECT (a2, 0); |
| 111 | 203 |
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204 return OBJECTS_CONFLICT_P (obj1, obj2); |
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205 } |
| 0 | 206 |
| 207 /* Check that X is REG or SUBREG of REG. */ | |
| 208 #define REG_SUBREG_P(x) \ | |
| 209 (REG_P (x) || (GET_CODE (x) == SUBREG && REG_P (SUBREG_REG (x)))) | |
| 210 | |
| 211 /* Return X if X is a REG, otherwise it should be SUBREG of REG and | |
| 212 the function returns the reg in this case. *OFFSET will be set to | |
| 213 0 in the first case or the regno offset in the first case. */ | |
| 214 static rtx | |
| 215 go_through_subreg (rtx x, int *offset) | |
| 216 { | |
| 217 rtx reg; | |
| 218 | |
| 219 *offset = 0; | |
| 220 if (REG_P (x)) | |
| 221 return x; | |
| 222 ira_assert (GET_CODE (x) == SUBREG); | |
| 223 reg = SUBREG_REG (x); | |
| 224 ira_assert (REG_P (reg)); | |
| 225 if (REGNO (reg) < FIRST_PSEUDO_REGISTER) | |
| 226 *offset = subreg_regno_offset (REGNO (reg), GET_MODE (reg), | |
| 227 SUBREG_BYTE (x), GET_MODE (x)); | |
| 131 | 228 else if (!can_div_trunc_p (SUBREG_BYTE (x), |
| 229 REGMODE_NATURAL_SIZE (GET_MODE (x)), offset)) | |
| 230 /* Checked by validate_subreg. We must know at compile time which | |
| 231 inner hard registers are being accessed. */ | |
| 232 gcc_unreachable (); | |
| 0 | 233 return reg; |
| 234 } | |
| 235 | |
| 236 /* Process registers REG1 and REG2 in move INSN with execution | |
| 237 frequency FREQ. The function also processes the registers in a | |
| 238 potential move insn (INSN == NULL in this case) with frequency | |
| 239 FREQ. The function can modify hard register costs of the | |
| 240 corresponding allocnos or create a copy involving the corresponding | |
| 241 allocnos. The function does nothing if the both registers are hard | |
| 242 registers. When nothing is changed, the function returns | |
| 243 FALSE. */ | |
| 244 static bool | |
| 245 process_regs_for_copy (rtx reg1, rtx reg2, bool constraint_p, | |
| 111 | 246 rtx_insn *insn, int freq) |
| 0 | 247 { |
| 248 int allocno_preferenced_hard_regno, cost, index, offset1, offset2; | |
| 249 bool only_regs_p; | |
| 250 ira_allocno_t a; | |
| 111 | 251 reg_class_t rclass, aclass; |
| 252 machine_mode mode; | |
| 0 | 253 ira_copy_t cp; |
| 254 | |
| 255 gcc_assert (REG_SUBREG_P (reg1) && REG_SUBREG_P (reg2)); | |
| 256 only_regs_p = REG_P (reg1) && REG_P (reg2); | |
| 257 reg1 = go_through_subreg (reg1, &offset1); | |
| 258 reg2 = go_through_subreg (reg2, &offset2); | |
| 259 /* Set up hard regno preferenced by allocno. If allocno gets the | |
| 260 hard regno the copy (or potential move) insn will be removed. */ | |
| 261 if (HARD_REGISTER_P (reg1)) | |
| 262 { | |
| 263 if (HARD_REGISTER_P (reg2)) | |
| 264 return false; | |
| 265 allocno_preferenced_hard_regno = REGNO (reg1) + offset1 - offset2; | |
| 266 a = ira_curr_regno_allocno_map[REGNO (reg2)]; | |
| 267 } | |
| 268 else if (HARD_REGISTER_P (reg2)) | |
| 269 { | |
| 270 allocno_preferenced_hard_regno = REGNO (reg2) + offset2 - offset1; | |
| 271 a = ira_curr_regno_allocno_map[REGNO (reg1)]; | |
| 272 } | |
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273 else |
| 0 | 274 { |
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275 ira_allocno_t a1 = ira_curr_regno_allocno_map[REGNO (reg1)]; |
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276 ira_allocno_t a2 = ira_curr_regno_allocno_map[REGNO (reg2)]; |
| 111 | 277 |
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278 if (!allocnos_conflict_for_copy_p (a1, a2) && offset1 == offset2) |
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279 { |
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280 cp = ira_add_allocno_copy (a1, a2, freq, constraint_p, insn, |
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281 ira_curr_loop_tree_node); |
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282 bitmap_set_bit (ira_curr_loop_tree_node->local_copies, cp->num); |
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283 return true; |
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284 } |
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285 else |
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286 return false; |
| 0 | 287 } |
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288 |
| 111 | 289 if (! IN_RANGE (allocno_preferenced_hard_regno, |
| 290 0, FIRST_PSEUDO_REGISTER - 1)) | |
| 145 | 291 /* Cannot be tied. */ |
| 0 | 292 return false; |
| 293 rclass = REGNO_REG_CLASS (allocno_preferenced_hard_regno); | |
| 294 mode = ALLOCNO_MODE (a); | |
| 111 | 295 aclass = ALLOCNO_CLASS (a); |
| 0 | 296 if (only_regs_p && insn != NULL_RTX |
| 111 | 297 && reg_class_size[rclass] <= ira_reg_class_max_nregs [rclass][mode]) |
| 0 | 298 /* It is already taken into account in ira-costs.c. */ |
| 299 return false; | |
| 111 | 300 index = ira_class_hard_reg_index[aclass][allocno_preferenced_hard_regno]; |
| 0 | 301 if (index < 0) |
| 145 | 302 /* Cannot be tied. It is not in the allocno class. */ |
| 0 | 303 return false; |
| 111 | 304 ira_init_register_move_cost_if_necessary (mode); |
| 0 | 305 if (HARD_REGISTER_P (reg1)) |
| 111 | 306 cost = ira_register_move_cost[mode][aclass][rclass] * freq; |
| 0 | 307 else |
| 111 | 308 cost = ira_register_move_cost[mode][rclass][aclass] * freq; |
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309 do |
| 0 | 310 { |
| 311 ira_allocate_and_set_costs | |
| 111 | 312 (&ALLOCNO_HARD_REG_COSTS (a), aclass, |
| 313 ALLOCNO_CLASS_COST (a)); | |
| 0 | 314 ira_allocate_and_set_costs |
| 111 | 315 (&ALLOCNO_CONFLICT_HARD_REG_COSTS (a), aclass, 0); |
| 0 | 316 ALLOCNO_HARD_REG_COSTS (a)[index] -= cost; |
| 317 ALLOCNO_CONFLICT_HARD_REG_COSTS (a)[index] -= cost; | |
| 111 | 318 if (ALLOCNO_HARD_REG_COSTS (a)[index] < ALLOCNO_CLASS_COST (a)) |
| 319 ALLOCNO_CLASS_COST (a) = ALLOCNO_HARD_REG_COSTS (a)[index]; | |
| 320 ira_add_allocno_pref (a, allocno_preferenced_hard_regno, freq); | |
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321 a = ira_parent_or_cap_allocno (a); |
| 0 | 322 } |
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323 while (a != NULL); |
| 0 | 324 return true; |
| 325 } | |
| 326 | |
| 145 | 327 /* Return true if output operand OUTPUT and input operand INPUT of |
| 328 INSN can use the same register class for at least one alternative. | |
| 329 INSN is already described in recog_data and recog_op_alt. */ | |
| 330 static bool | |
| 331 can_use_same_reg_p (rtx_insn *insn, int output, int input) | |
| 332 { | |
| 333 alternative_mask preferred = get_preferred_alternatives (insn); | |
| 334 for (int nalt = 0; nalt < recog_data.n_alternatives; nalt++) | |
| 335 { | |
| 336 if (!TEST_BIT (preferred, nalt)) | |
| 337 continue; | |
| 338 | |
| 339 const operand_alternative *op_alt | |
| 340 = &recog_op_alt[nalt * recog_data.n_operands]; | |
| 341 if (op_alt[input].matches == output) | |
| 342 return true; | |
| 343 | |
| 344 if (ira_reg_class_intersect[op_alt[input].cl][op_alt[output].cl] | |
| 345 != NO_REGS) | |
| 346 return true; | |
| 347 } | |
| 348 return false; | |
| 349 } | |
| 350 | |
| 351 /* Process all of the output registers of the current insn (INSN) which | |
| 352 are not bound (BOUND_P) and the input register REG (its operand number | |
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353 OP_NUM) which dies in the insn as if there were a move insn between |
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354 them with frequency FREQ. */ |
| 0 | 355 static void |
| 145 | 356 process_reg_shuffles (rtx_insn *insn, rtx reg, int op_num, int freq, |
| 357 bool *bound_p) | |
| 0 | 358 { |
| 359 int i; | |
| 360 rtx another_reg; | |
| 361 | |
| 362 gcc_assert (REG_SUBREG_P (reg)); | |
| 363 for (i = 0; i < recog_data.n_operands; i++) | |
| 364 { | |
| 365 another_reg = recog_data.operand[i]; | |
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366 |
| 0 | 367 if (!REG_SUBREG_P (another_reg) || op_num == i |
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368 || recog_data.operand_type[i] != OP_OUT |
| 145 | 369 || bound_p[i] |
| 370 || (!can_use_same_reg_p (insn, i, op_num) | |
| 371 && (recog_data.constraints[op_num][0] != '%' | |
| 372 || !can_use_same_reg_p (insn, i, op_num + 1)) | |
| 373 && (op_num == 0 | |
| 374 || recog_data.constraints[op_num - 1][0] != '%' | |
| 375 || !can_use_same_reg_p (insn, i, op_num - 1)))) | |
| 0 | 376 continue; |
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377 |
| 111 | 378 process_regs_for_copy (reg, another_reg, false, NULL, freq); |
| 0 | 379 } |
| 380 } | |
| 381 | |
| 382 /* Process INSN and create allocno copies if necessary. For example, | |
| 383 it might be because INSN is a pseudo-register move or INSN is two | |
| 384 operand insn. */ | |
| 385 static void | |
| 111 | 386 add_insn_allocno_copies (rtx_insn *insn) |
| 0 | 387 { |
| 388 rtx set, operand, dup; | |
| 111 | 389 bool bound_p[MAX_RECOG_OPERANDS]; |
| 390 int i, n, freq; | |
| 145 | 391 alternative_mask alts; |
|
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392 |
| 0 | 393 freq = REG_FREQ_FROM_BB (BLOCK_FOR_INSN (insn)); |
| 394 if (freq == 0) | |
| 395 freq = 1; | |
| 396 if ((set = single_set (insn)) != NULL_RTX | |
| 397 && REG_SUBREG_P (SET_DEST (set)) && REG_SUBREG_P (SET_SRC (set)) | |
| 398 && ! side_effects_p (set) | |
| 399 && find_reg_note (insn, REG_DEAD, | |
| 400 REG_P (SET_SRC (set)) | |
| 401 ? SET_SRC (set) | |
| 402 : SUBREG_REG (SET_SRC (set))) != NULL_RTX) | |
|
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403 { |
| 111 | 404 process_regs_for_copy (SET_SRC (set), SET_DEST (set), |
| 405 false, insn, freq); | |
|
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406 return; |
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407 } |
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408 /* Fast check of possibility of constraint or shuffle copies. If |
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409 there are no dead registers, there will be no such copies. */ |
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410 if (! find_reg_note (insn, REG_DEAD, NULL_RTX)) |
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411 return; |
| 145 | 412 alts = ira_setup_alts (insn); |
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413 for (i = 0; i < recog_data.n_operands; i++) |
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414 bound_p[i] = false; |
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415 for (i = 0; i < recog_data.n_operands; i++) |
| 0 | 416 { |
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417 operand = recog_data.operand[i]; |
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418 if (! REG_SUBREG_P (operand)) |
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419 continue; |
| 111 | 420 if ((n = ira_get_dup_out_num (i, alts)) >= 0) |
| 421 { | |
| 422 bound_p[n] = true; | |
| 423 dup = recog_data.operand[n]; | |
| 424 if (REG_SUBREG_P (dup) | |
| 425 && find_reg_note (insn, REG_DEAD, | |
| 426 REG_P (operand) | |
| 427 ? operand | |
| 428 : SUBREG_REG (operand)) != NULL_RTX) | |
| 429 process_regs_for_copy (operand, dup, true, NULL, | |
| 430 freq); | |
| 431 } | |
|
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432 } |
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433 for (i = 0; i < recog_data.n_operands; i++) |
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434 { |
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435 operand = recog_data.operand[i]; |
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436 if (REG_SUBREG_P (operand) |
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437 && find_reg_note (insn, REG_DEAD, |
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438 REG_P (operand) |
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439 ? operand : SUBREG_REG (operand)) != NULL_RTX) |
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440 /* If an operand dies, prefer its hard register for the output |
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441 operands by decreasing the hard register cost or creating |
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442 the corresponding allocno copies. The cost will not |
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443 correspond to a real move insn cost, so make the frequency |
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444 smaller. */ |
| 145 | 445 process_reg_shuffles (insn, operand, i, freq < 8 ? 1 : freq / 8, |
| 446 bound_p); | |
| 0 | 447 } |
| 448 } | |
| 449 | |
| 450 /* Add copies originated from BB given by LOOP_TREE_NODE. */ | |
| 451 static void | |
| 452 add_copies (ira_loop_tree_node_t loop_tree_node) | |
| 453 { | |
| 454 basic_block bb; | |
| 111 | 455 rtx_insn *insn; |
| 0 | 456 |
| 457 bb = loop_tree_node->bb; | |
| 458 if (bb == NULL) | |
| 459 return; | |
| 460 FOR_BB_INSNS (bb, insn) | |
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461 if (NONDEBUG_INSN_P (insn)) |
| 0 | 462 add_insn_allocno_copies (insn); |
| 463 } | |
| 464 | |
| 465 /* Propagate copies the corresponding allocnos on upper loop tree | |
| 466 level. */ | |
| 467 static void | |
| 468 propagate_copies (void) | |
| 469 { | |
| 470 ira_copy_t cp; | |
| 471 ira_copy_iterator ci; | |
| 472 ira_allocno_t a1, a2, parent_a1, parent_a2; | |
| 473 | |
| 474 FOR_EACH_COPY (cp, ci) | |
| 475 { | |
| 476 a1 = cp->first; | |
| 477 a2 = cp->second; | |
| 478 if (ALLOCNO_LOOP_TREE_NODE (a1) == ira_loop_tree_root) | |
| 479 continue; | |
| 480 ira_assert ((ALLOCNO_LOOP_TREE_NODE (a2) != ira_loop_tree_root)); | |
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481 parent_a1 = ira_parent_or_cap_allocno (a1); |
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482 parent_a2 = ira_parent_or_cap_allocno (a2); |
| 0 | 483 ira_assert (parent_a1 != NULL && parent_a2 != NULL); |
|
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484 if (! allocnos_conflict_for_copy_p (parent_a1, parent_a2)) |
| 0 | 485 ira_add_allocno_copy (parent_a1, parent_a2, cp->freq, |
| 486 cp->constraint_p, cp->insn, cp->loop_tree_node); | |
| 487 } | |
| 488 } | |
| 489 | |
| 490 /* Array used to collect all conflict allocnos for given allocno. */ | |
|
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491 static ira_object_t *collected_conflict_objects; |
| 0 | 492 |
| 493 /* Build conflict vectors or bit conflict vectors (whatever is more | |
|
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494 profitable) for object OBJ from the conflict table. */ |
| 0 | 495 static void |
|
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496 build_object_conflicts (ira_object_t obj) |
| 0 | 497 { |
| 498 int i, px, parent_num; | |
|
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499 ira_allocno_t parent_a, another_parent_a; |
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500 ira_object_t parent_obj; |
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501 ira_allocno_t a = OBJECT_ALLOCNO (obj); |
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502 IRA_INT_TYPE *object_conflicts; |
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503 minmax_set_iterator asi; |
| 111 | 504 int parent_min, parent_max ATTRIBUTE_UNUSED; |
| 0 | 505 |
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506 object_conflicts = conflicts[OBJECT_CONFLICT_ID (obj)]; |
| 0 | 507 px = 0; |
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508 FOR_EACH_BIT_IN_MINMAX_SET (object_conflicts, |
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509 OBJECT_MIN (obj), OBJECT_MAX (obj), i, asi) |
| 0 | 510 { |
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511 ira_object_t another_obj = ira_object_id_map[i]; |
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512 ira_allocno_t another_a = OBJECT_ALLOCNO (obj); |
| 111 | 513 |
| 0 | 514 ira_assert (ira_reg_classes_intersect_p |
| 111 | 515 [ALLOCNO_CLASS (a)][ALLOCNO_CLASS (another_a)]); |
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516 collected_conflict_objects[px++] = another_obj; |
| 0 | 517 } |
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518 if (ira_conflict_vector_profitable_p (obj, px)) |
| 0 | 519 { |
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520 ira_object_t *vec; |
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521 ira_allocate_conflict_vec (obj, px); |
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522 vec = OBJECT_CONFLICT_VEC (obj); |
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523 memcpy (vec, collected_conflict_objects, sizeof (ira_object_t) * px); |
| 0 | 524 vec[px] = NULL; |
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525 OBJECT_NUM_CONFLICTS (obj) = px; |
| 0 | 526 } |
| 527 else | |
| 528 { | |
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529 int conflict_bit_vec_words_num; |
| 111 | 530 |
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531 OBJECT_CONFLICT_ARRAY (obj) = object_conflicts; |
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532 if (OBJECT_MAX (obj) < OBJECT_MIN (obj)) |
| 0 | 533 conflict_bit_vec_words_num = 0; |
| 534 else | |
| 535 conflict_bit_vec_words_num | |
|
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536 = ((OBJECT_MAX (obj) - OBJECT_MIN (obj) + IRA_INT_BITS) |
| 0 | 537 / IRA_INT_BITS); |
|
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538 OBJECT_CONFLICT_ARRAY_SIZE (obj) |
| 0 | 539 = conflict_bit_vec_words_num * sizeof (IRA_INT_TYPE); |
| 540 } | |
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541 |
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542 parent_a = ira_parent_or_cap_allocno (a); |
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543 if (parent_a == NULL) |
| 0 | 544 return; |
| 111 | 545 ira_assert (ALLOCNO_CLASS (a) == ALLOCNO_CLASS (parent_a)); |
|
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546 ira_assert (ALLOCNO_NUM_OBJECTS (a) == ALLOCNO_NUM_OBJECTS (parent_a)); |
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547 parent_obj = ALLOCNO_OBJECT (parent_a, OBJECT_SUBWORD (obj)); |
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548 parent_num = OBJECT_CONFLICT_ID (parent_obj); |
| 111 | 549 parent_min = OBJECT_MIN (parent_obj); |
| 550 parent_max = OBJECT_MAX (parent_obj); | |
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551 FOR_EACH_BIT_IN_MINMAX_SET (object_conflicts, |
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552 OBJECT_MIN (obj), OBJECT_MAX (obj), i, asi) |
| 0 | 553 { |
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554 ira_object_t another_obj = ira_object_id_map[i]; |
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555 ira_allocno_t another_a = OBJECT_ALLOCNO (another_obj); |
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556 int another_word = OBJECT_SUBWORD (another_obj); |
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557 |
| 0 | 558 ira_assert (ira_reg_classes_intersect_p |
| 111 | 559 [ALLOCNO_CLASS (a)][ALLOCNO_CLASS (another_a)]); |
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560 |
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561 another_parent_a = ira_parent_or_cap_allocno (another_a); |
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562 if (another_parent_a == NULL) |
| 0 | 563 continue; |
| 564 ira_assert (ALLOCNO_NUM (another_parent_a) >= 0); | |
| 111 | 565 ira_assert (ALLOCNO_CLASS (another_a) |
| 566 == ALLOCNO_CLASS (another_parent_a)); | |
|
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567 ira_assert (ALLOCNO_NUM_OBJECTS (another_a) |
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568 == ALLOCNO_NUM_OBJECTS (another_parent_a)); |
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569 SET_MINMAX_SET_BIT (conflicts[parent_num], |
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570 OBJECT_CONFLICT_ID (ALLOCNO_OBJECT (another_parent_a, |
| 111 | 571 another_word)), |
| 572 parent_min, parent_max); | |
| 0 | 573 } |
| 574 } | |
| 575 | |
| 576 /* Build conflict vectors or bit conflict vectors (whatever is more | |
| 577 profitable) of all allocnos from the conflict table. */ | |
| 578 static void | |
| 579 build_conflicts (void) | |
| 580 { | |
| 581 int i; | |
| 582 ira_allocno_t a, cap; | |
| 583 | |
|
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584 collected_conflict_objects |
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585 = (ira_object_t *) ira_allocate (sizeof (ira_object_t) |
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586 * ira_objects_num); |
| 0 | 587 for (i = max_reg_num () - 1; i >= FIRST_PSEUDO_REGISTER; i--) |
| 588 for (a = ira_regno_allocno_map[i]; | |
| 589 a != NULL; | |
| 590 a = ALLOCNO_NEXT_REGNO_ALLOCNO (a)) | |
| 591 { | |
|
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592 int j, nregs = ALLOCNO_NUM_OBJECTS (a); |
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593 for (j = 0; j < nregs; j++) |
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594 { |
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595 ira_object_t obj = ALLOCNO_OBJECT (a, j); |
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596 build_object_conflicts (obj); |
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597 for (cap = ALLOCNO_CAP (a); cap != NULL; cap = ALLOCNO_CAP (cap)) |
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598 { |
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599 ira_object_t cap_obj = ALLOCNO_OBJECT (cap, j); |
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600 gcc_assert (ALLOCNO_NUM_OBJECTS (cap) == ALLOCNO_NUM_OBJECTS (a)); |
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601 build_object_conflicts (cap_obj); |
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602 } |
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603 } |
| 0 | 604 } |
|
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605 ira_free (collected_conflict_objects); |
| 0 | 606 } |
| 607 | |
| 608 | |
| 609 | |
| 610 /* Print hard reg set SET with TITLE to FILE. */ | |
| 611 static void | |
| 612 print_hard_reg_set (FILE *file, const char *title, HARD_REG_SET set) | |
| 613 { | |
| 145 | 614 int i, start, end; |
| 0 | 615 |
|
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616 fputs (title, file); |
| 145 | 617 for (start = end = -1, i = 0; i < FIRST_PSEUDO_REGISTER; i++) |
| 0 | 618 { |
| 145 | 619 bool reg_included = TEST_HARD_REG_BIT (set, i); |
| 620 | |
| 621 if (reg_included) | |
| 0 | 622 { |
| 145 | 623 if (start == -1) |
| 0 | 624 start = i; |
| 145 | 625 end = i; |
| 0 | 626 } |
| 145 | 627 if (start >= 0 && (!reg_included || i == FIRST_PSEUDO_REGISTER - 1)) |
| 0 | 628 { |
| 145 | 629 if (start == end) |
| 0 | 630 fprintf (file, " %d", start); |
| 145 | 631 else if (start == end + 1) |
| 632 fprintf (file, " %d %d", start, end); | |
| 0 | 633 else |
| 145 | 634 fprintf (file, " %d-%d", start, end); |
| 0 | 635 start = -1; |
| 636 } | |
| 637 } | |
|
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638 putc ('\n', file); |
| 0 | 639 } |
| 640 | |
|
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641 static void |
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642 print_allocno_conflicts (FILE * file, bool reg_p, ira_allocno_t a) |
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643 { |
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644 HARD_REG_SET conflicting_hard_regs; |
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645 basic_block bb; |
|
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646 int n, i; |
|
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647 |
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648 if (reg_p) |
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649 fprintf (file, ";; r%d", ALLOCNO_REGNO (a)); |
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650 else |
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651 { |
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652 fprintf (file, ";; a%d(r%d,", ALLOCNO_NUM (a), ALLOCNO_REGNO (a)); |
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653 if ((bb = ALLOCNO_LOOP_TREE_NODE (a)->bb) != NULL) |
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654 fprintf (file, "b%d", bb->index); |
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655 else |
| 111 | 656 fprintf (file, "l%d", ALLOCNO_LOOP_TREE_NODE (a)->loop_num); |
|
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657 putc (')', file); |
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658 } |
|
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659 |
|
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660 fputs (" conflicts:", file); |
|
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661 n = ALLOCNO_NUM_OBJECTS (a); |
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662 for (i = 0; i < n; i++) |
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663 { |
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664 ira_object_t obj = ALLOCNO_OBJECT (a, i); |
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665 ira_object_t conflict_obj; |
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666 ira_object_conflict_iterator oci; |
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667 |
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668 if (OBJECT_CONFLICT_ARRAY (obj) == NULL) |
| 145 | 669 { |
| 670 fprintf (file, "\n;; total conflict hard regs:\n"); | |
| 671 fprintf (file, ";; conflict hard regs:\n\n"); | |
| 672 continue; | |
| 673 } | |
| 674 | |
|
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675 if (n > 1) |
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676 fprintf (file, "\n;; subobject %d:", i); |
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677 FOR_EACH_OBJECT_CONFLICT (obj, conflict_obj, oci) |
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678 { |
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679 ira_allocno_t conflict_a = OBJECT_ALLOCNO (conflict_obj); |
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680 if (reg_p) |
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681 fprintf (file, " r%d,", ALLOCNO_REGNO (conflict_a)); |
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682 else |
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683 { |
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684 fprintf (file, " a%d(r%d", ALLOCNO_NUM (conflict_a), |
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685 ALLOCNO_REGNO (conflict_a)); |
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686 if (ALLOCNO_NUM_OBJECTS (conflict_a) > 1) |
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687 fprintf (file, ",w%d", OBJECT_SUBWORD (conflict_obj)); |
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688 if ((bb = ALLOCNO_LOOP_TREE_NODE (conflict_a)->bb) != NULL) |
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689 fprintf (file, ",b%d", bb->index); |
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690 else |
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691 fprintf (file, ",l%d", |
| 111 | 692 ALLOCNO_LOOP_TREE_NODE (conflict_a)->loop_num); |
|
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693 putc (')', file); |
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694 } |
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695 } |
| 145 | 696 conflicting_hard_regs = (OBJECT_TOTAL_CONFLICT_HARD_REGS (obj) |
| 697 & ~ira_no_alloc_regs | |
| 698 & reg_class_contents[ALLOCNO_CLASS (a)]); | |
|
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699 print_hard_reg_set (file, "\n;; total conflict hard regs:", |
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700 conflicting_hard_regs); |
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701 |
| 145 | 702 conflicting_hard_regs = (OBJECT_CONFLICT_HARD_REGS (obj) |
| 703 & ~ira_no_alloc_regs | |
| 704 & reg_class_contents[ALLOCNO_CLASS (a)]); | |
|
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705 print_hard_reg_set (file, ";; conflict hard regs:", |
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706 conflicting_hard_regs); |
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707 putc ('\n', file); |
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708 } |
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709 |
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710 } |
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711 |
| 0 | 712 /* Print information about allocno or only regno (if REG_P) conflicts |
| 713 to FILE. */ | |
| 714 static void | |
| 715 print_conflicts (FILE *file, bool reg_p) | |
| 716 { | |
| 717 ira_allocno_t a; | |
| 718 ira_allocno_iterator ai; | |
| 719 | |
| 720 FOR_EACH_ALLOCNO (a, ai) | |
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721 print_allocno_conflicts (file, reg_p, a); |
| 145 | 722 putc ('\n', file); |
| 0 | 723 } |
| 724 | |
| 725 /* Print information about allocno or only regno (if REG_P) conflicts | |
| 726 to stderr. */ | |
| 727 void | |
| 728 ira_debug_conflicts (bool reg_p) | |
| 729 { | |
| 730 print_conflicts (stderr, reg_p); | |
| 731 } | |
| 732 | |
| 733 | |
| 734 | |
| 735 /* Entry function which builds allocno conflicts and allocno copies | |
| 736 and accumulate some allocno info on upper level regions. */ | |
| 737 void | |
| 738 ira_build_conflicts (void) | |
| 739 { | |
| 111 | 740 enum reg_class base; |
| 0 | 741 ira_allocno_t a; |
| 742 ira_allocno_iterator ai; | |
| 743 HARD_REG_SET temp_hard_reg_set; | |
| 744 | |
| 745 if (ira_conflicts_p) | |
| 746 { | |
| 747 ira_conflicts_p = build_conflict_bit_table (); | |
| 748 if (ira_conflicts_p) | |
| 749 { | |
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750 ira_object_t obj; |
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751 ira_object_iterator oi; |
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752 |
| 0 | 753 build_conflicts (); |
| 111 | 754 ira_traverse_loop_tree (true, ira_loop_tree_root, add_copies, NULL); |
| 0 | 755 /* We need finished conflict table for the subsequent call. */ |
| 756 if (flag_ira_region == IRA_REGION_ALL | |
| 757 || flag_ira_region == IRA_REGION_MIXED) | |
| 758 propagate_copies (); | |
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759 |
| 0 | 760 /* Now we can free memory for the conflict table (see function |
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761 build_object_conflicts for details). */ |
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762 FOR_EACH_OBJECT (obj, oi) |
| 0 | 763 { |
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764 if (OBJECT_CONFLICT_ARRAY (obj) != conflicts[OBJECT_CONFLICT_ID (obj)]) |
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765 ira_free (conflicts[OBJECT_CONFLICT_ID (obj)]); |
| 0 | 766 } |
| 767 ira_free (conflicts); | |
| 768 } | |
| 769 } | |
| 111 | 770 base = base_reg_class (VOIDmode, ADDR_SPACE_GENERIC, ADDRESS, SCRATCH); |
| 771 if (! targetm.class_likely_spilled_p (base)) | |
| 0 | 772 CLEAR_HARD_REG_SET (temp_hard_reg_set); |
| 773 else | |
| 145 | 774 temp_hard_reg_set = reg_class_contents[base] & ~ira_no_alloc_regs; |
| 0 | 775 FOR_EACH_ALLOCNO (a, ai) |
| 776 { | |
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777 int i, n = ALLOCNO_NUM_OBJECTS (a); |
| 111 | 778 |
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779 for (i = 0; i < n; i++) |
| 0 | 780 { |
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781 ira_object_t obj = ALLOCNO_OBJECT (a, i); |
| 111 | 782 rtx allocno_reg = regno_reg_rtx [ALLOCNO_REGNO (a)]; |
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783 |
| 145 | 784 /* For debugging purposes don't put user defined variables in |
| 785 callee-clobbered registers. However, do allow parameters | |
| 786 in callee-clobbered registers to improve debugging. This | |
| 787 is a bit of a fragile hack. */ | |
| 788 if (optimize == 0 | |
| 789 && REG_USERVAR_P (allocno_reg) | |
| 790 && ! reg_is_parm_p (allocno_reg)) | |
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791 { |
| 145 | 792 HARD_REG_SET new_conflict_regs = crtl->abi->full_reg_clobbers (); |
| 793 OBJECT_TOTAL_CONFLICT_HARD_REGS (obj) |= new_conflict_regs; | |
| 794 OBJECT_CONFLICT_HARD_REGS (obj) |= new_conflict_regs; | |
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795 } |
| 145 | 796 |
| 797 if (ALLOCNO_CALLS_CROSSED_NUM (a) != 0) | |
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798 { |
| 145 | 799 HARD_REG_SET new_conflict_regs = ira_need_caller_save_regs (a); |
| 800 if (flag_caller_saves) | |
| 801 new_conflict_regs &= (~savable_regs | temp_hard_reg_set); | |
| 802 OBJECT_TOTAL_CONFLICT_HARD_REGS (obj) |= new_conflict_regs; | |
| 803 OBJECT_CONFLICT_HARD_REGS (obj) |= new_conflict_regs; | |
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804 } |
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805 |
| 111 | 806 /* Now we deal with paradoxical subreg cases where certain registers |
| 807 cannot be accessed in the widest mode. */ | |
| 808 machine_mode outer_mode = ALLOCNO_WMODE (a); | |
| 809 machine_mode inner_mode = ALLOCNO_MODE (a); | |
| 810 if (paradoxical_subreg_p (outer_mode, inner_mode)) | |
| 811 { | |
| 812 enum reg_class aclass = ALLOCNO_CLASS (a); | |
| 813 for (int j = ira_class_hard_regs_num[aclass] - 1; j >= 0; --j) | |
| 814 { | |
| 815 int inner_regno = ira_class_hard_regs[aclass][j]; | |
| 816 int outer_regno = simplify_subreg_regno (inner_regno, | |
| 817 inner_mode, 0, | |
| 818 outer_mode); | |
| 819 if (outer_regno < 0 | |
| 820 || !in_hard_reg_set_p (reg_class_contents[aclass], | |
| 821 outer_mode, outer_regno)) | |
| 822 { | |
| 823 SET_HARD_REG_BIT (OBJECT_TOTAL_CONFLICT_HARD_REGS (obj), | |
| 824 inner_regno); | |
| 825 SET_HARD_REG_BIT (OBJECT_CONFLICT_HARD_REGS (obj), | |
| 826 inner_regno); | |
| 827 } | |
| 828 } | |
| 829 } | |
| 0 | 830 } |
| 831 } | |
| 832 if (optimize && ira_conflicts_p | |
| 833 && internal_flag_ira_verbose > 2 && ira_dump_file != NULL) | |
| 834 print_conflicts (ira_dump_file, false); | |
| 835 } |