417 Commits

Author	SHA1	Message	Date
Дмитрий Изволов	69b54c1a05	[libcxx][algorithm] Optimize std::stable_sort via radix sort algorithm (#104683) ... The radix sort (LSD) algorithm allows to speed up std::stable_sort dramatically in case we sort integers. The speed up varies from a relatively small to x10 times, depending on type of sorted elements and the initial state of the sorted array. ``` Running ./libcxx/test/benchmarks/stable_sort.bench.out Run on (12 X 2600 MHz CPU s) CPU Caches: L1 Data 32 KiB L1 Instruction 32 KiB L2 Unified 256 KiB (x6) L3 Unified 12288 KiB Load Average: 3.48, 3.38, 3.08 --------------------------------------------------------------------------- Benchmark After Before --------------------------------------------------------------------------- BM_StableSort_int8_Random_1 3.39 ns 3.58 ns BM_StableSort_int8_Random_4 21.1 ns 21.9 ns BM_StableSort_int8_Random_16 142 ns 147 ns BM_StableSort_int8_Random_64 893 ns 903 ns BM_StableSort_int8_Random_256 409 ns 5810 ns BM_StableSort_int8_Random_1024 1235 ns 29973 ns BM_StableSort_int8_Random_4096 4410 ns 141880 ns BM_StableSort_int8_Random_16384 18044 ns 620540 ns BM_StableSort_int8_Random_65536 144030 ns 2592013 ns BM_StableSort_int8_Random_262144 858350 ns 10935814 ns BM_StableSort_int8_Random_524288 2929988 ns 27060729 ns BM_StableSort_int8_Random_1048576 6058292 ns 49622720 ns BM_StableSort_int8_Ascending_1 3.42 ns 3.92 ns BM_StableSort_int8_Ascending_4 5.86 ns 8.08 ns BM_StableSort_int8_Ascending_16 10.6 ns 12.0 ns BM_StableSort_int8_Ascending_64 28.9 ns 30.6 ns BM_StableSort_int8_Ascending_256 415 ns 391 ns BM_StableSort_int8_Ascending_1024 1666 ns 2309 ns BM_StableSort_int8_Ascending_4096 7748 ns 12269 ns BM_StableSort_int8_Ascending_16384 40588 ns 60181 ns BM_StableSort_int8_Ascending_65536 178843 ns 298221 ns BM_StableSort_int8_Ascending_262144 919959 ns 1402692 ns BM_StableSort_int8_Ascending_524288 2397397 ns 3036984 ns BM_StableSort_int8_Ascending_1048576 5080043 ns 7218581 ns BM_StableSort_int8_Descending_1 3.44 ns 3.53 ns BM_StableSort_int8_Descending_4 7.94 ns 8.29 ns BM_StableSort_int8_Descending_16 59.6 ns 57.7 ns BM_StableSort_int8_Descending_64 1051 ns 1027 ns BM_StableSort_int8_Descending_256 422 ns 4718 ns BM_StableSort_int8_Descending_1024 1676 ns 21044 ns BM_StableSort_int8_Descending_4096 7766 ns 64827 ns BM_StableSort_int8_Descending_16384 40230 ns 93981 ns BM_StableSort_int8_Descending_65536 190978 ns 421151 ns BM_StableSort_int8_Descending_262144 1055141 ns 1918927 ns BM_StableSort_int8_Descending_524288 2875115 ns 3809153 ns BM_StableSort_int8_Descending_1048576 5854135 ns 8713690 ns BM_StableSort_int8_SingleElement_1 3.52 ns 3.46 ns BM_StableSort_int8_SingleElement_4 6.25 ns 5.79 ns BM_StableSort_int8_SingleElement_16 10.7 ns 11.4 ns BM_StableSort_int8_SingleElement_64 29.3 ns 30.3 ns BM_StableSort_int8_SingleElement_256 858 ns 380 ns BM_StableSort_int8_SingleElement_1024 3036 ns 2231 ns BM_StableSort_int8_SingleElement_4096 11580 ns 11866 ns BM_StableSort_int8_SingleElement_16384 44956 ns 59621 ns BM_StableSort_int8_SingleElement_65536 182006 ns 297853 ns BM_StableSort_int8_SingleElement_262144 962181 ns 1432857 ns BM_StableSort_int8_SingleElement_524288 2256687 ns 2975707 ns BM_StableSort_int8_SingleElement_1048576 4522556 ns 6949948 ns BM_StableSort_int8_PipeOrgan_1 3.26 ns 3.64 ns BM_StableSort_int8_PipeOrgan_4 6.21 ns 6.58 ns BM_StableSort_int8_PipeOrgan_16 23.7 ns 25.4 ns BM_StableSort_int8_PipeOrgan_64 250 ns 248 ns BM_StableSort_int8_PipeOrgan_256 414 ns 2498 ns BM_StableSort_int8_PipeOrgan_1024 1697 ns 10946 ns BM_StableSort_int8_PipeOrgan_4096 7840 ns 37238 ns BM_StableSort_int8_PipeOrgan_16384 41402 ns 74805 ns BM_StableSort_int8_PipeOrgan_65536 180107 ns 357891 ns BM_StableSort_int8_PipeOrgan_262144 988273 ns 1647296 ns BM_StableSort_int8_PipeOrgan_524288 2547374 ns 3245991 ns BM_StableSort_int8_PipeOrgan_1048576 5128783 ns 7342444 ns BM_StableSort_int8_QuickSortAdversary_1 3.14 ns 4.01 ns BM_StableSort_int8_QuickSortAdversary_4 6.05 ns 7.02 ns BM_StableSort_int8_QuickSortAdversary_16 10.5 ns 11.9 ns BM_StableSort_int8_QuickSortAdversary_64 520 ns 516 ns BM_StableSort_int8_QuickSortAdversary_256 920 ns 386 ns BM_StableSort_int8_QuickSortAdversary_1024 3083 ns 2299 ns BM_StableSort_int8_QuickSortAdversary_4096 11659 ns 12295 ns BM_StableSort_int8_QuickSortAdversary_16384 45721 ns 60931 ns BM_StableSort_int8_QuickSortAdversary_65536 186334 ns 295423 ns BM_StableSort_int8_QuickSortAdversary_262144 946262 ns 1399973 ns BM_StableSort_int8_QuickSortAdversary_524288 2282004 ns 2832266 ns BM_StableSort_int8_QuickSortAdversary_1048576 4691123 ns 6963253 ns BM_StableSort_uint8_Random_1 3.11 ns 3.44 ns BM_StableSort_uint8_Random_4 21.9 ns 23.1 ns BM_StableSort_uint8_Random_16 154 ns 171 ns BM_StableSort_uint8_Random_64 1000 ns 1051 ns BM_StableSort_uint8_Random_256 402 ns 6498 ns BM_StableSort_uint8_Random_1024 1176 ns 35310 ns BM_StableSort_uint8_Random_4096 4415 ns 164087 ns BM_StableSort_uint8_Random_16384 17849 ns 686769 ns BM_StableSort_uint8_Random_65536 146109 ns 2932051 ns BM_StableSort_uint8_Random_262144 876710 ns 12163988 ns BM_StableSort_uint8_Random_524288 2858089 ns 26458830 ns BM_StableSort_uint8_Random_1048576 5766942 ns 54836214 ns BM_StableSort_uint8_Ascending_1 3.11 ns 3.43 ns BM_StableSort_uint8_Ascending_4 6.18 ns 7.24 ns BM_StableSort_uint8_Ascending_16 14.5 ns 17.0 ns BM_StableSort_uint8_Ascending_64 50.7 ns 59.2 ns BM_StableSort_uint8_Ascending_256 395 ns 536 ns BM_StableSort_uint8_Ascending_1024 1752 ns 2956 ns BM_StableSort_uint8_Ascending_4096 7785 ns 15146 ns BM_StableSort_uint8_Ascending_16384 41442 ns 74136 ns BM_StableSort_uint8_Ascending_65536 180879 ns 354261 ns BM_StableSort_uint8_Ascending_262144 945880 ns 1674256 ns BM_StableSort_uint8_Ascending_524288 2287832 ns 3138581 ns BM_StableSort_uint8_Ascending_1048576 4630290 ns 7296278 ns BM_StableSort_uint8_Descending_1 3.19 ns 3.63 ns BM_StableSort_uint8_Descending_4 9.60 ns 11.5 ns BM_StableSort_uint8_Descending_16 78.3 ns 86.0 ns BM_StableSort_uint8_Descending_64 1265 ns 1308 ns BM_StableSort_uint8_Descending_256 395 ns 6556 ns BM_StableSort_uint8_Descending_1024 1712 ns 24669 ns BM_StableSort_uint8_Descending_4096 7748 ns 83407 ns BM_StableSort_uint8_Descending_16384 40779 ns 104043 ns BM_StableSort_uint8_Descending_65536 181560 ns 467680 ns BM_StableSort_uint8_Descending_262144 1146627 ns 2102769 ns BM_StableSort_uint8_Descending_524288 2874096 ns 4572229 ns BM_StableSort_uint8_Descending_1048576 5873195 ns 10170663 ns BM_StableSort_uint8_SingleElement_1 3.28 ns 3.58 ns BM_StableSort_uint8_SingleElement_4 6.44 ns 7.40 ns BM_StableSort_uint8_SingleElement_16 14.9 ns 16.4 ns BM_StableSort_uint8_SingleElement_64 51.2 ns 52.9 ns BM_StableSort_uint8_SingleElement_256 876 ns 490 ns BM_StableSort_uint8_SingleElement_1024 3041 ns 2750 ns BM_StableSort_uint8_SingleElement_4096 11947 ns 14326 ns BM_StableSort_uint8_SingleElement_16384 46669 ns 69984 ns BM_StableSort_uint8_SingleElement_65536 197903 ns 328961 ns BM_StableSort_uint8_SingleElement_262144 1031466 ns 1551436 ns BM_StableSort_uint8_SingleElement_524288 2447672 ns 3049553 ns BM_StableSort_uint8_SingleElement_1048576 4793087 ns 7615245 ns BM_StableSort_uint8_PipeOrgan_1 3.38 ns 3.56 ns BM_StableSort_uint8_PipeOrgan_4 7.16 ns 8.70 ns BM_StableSort_uint8_PipeOrgan_16 31.7 ns 35.3 ns BM_StableSort_uint8_PipeOrgan_64 326 ns 366 ns BM_StableSort_uint8_PipeOrgan_256 409 ns 2942 ns BM_StableSort_uint8_PipeOrgan_1024 1994 ns 12571 ns BM_StableSort_uint8_PipeOrgan_4096 8086 ns 46278 ns BM_StableSort_uint8_PipeOrgan_16384 41749 ns 79813 ns BM_StableSort_uint8_PipeOrgan_65536 180697 ns 375120 ns BM_StableSort_uint8_PipeOrgan_262144 1004899 ns 1676143 ns BM_StableSort_uint8_PipeOrgan_524288 2456081 ns 3333949 ns BM_StableSort_uint8_PipeOrgan_1048576 5030857 ns 7591303 ns BM_StableSort_uint8_QuickSortAdversary_1 3.12 ns 3.46 ns BM_StableSort_uint8_QuickSortAdversary_4 7.25 ns 6.83 ns BM_StableSort_uint8_QuickSortAdversary_16 14.6 ns 16.2 ns BM_StableSort_uint8_QuickSortAdversary_64 650 ns 665 ns BM_StableSort_uint8_QuickSortAdversary_256 395 ns 2982 ns BM_StableSort_uint8_QuickSortAdversary_1024 3125 ns 2583 ns BM_StableSort_uint8_QuickSortAdversary_4096 11797 ns 13929 ns BM_StableSort_uint8_QuickSortAdversary_16384 45803 ns 66513 ns BM_StableSort_uint8_QuickSortAdversary_65536 190745 ns 313467 ns BM_StableSort_uint8_QuickSortAdversary_262144 974646 ns 1469014 ns BM_StableSort_uint8_QuickSortAdversary_524288 2317553 ns 3022065 ns BM_StableSort_uint8_QuickSortAdversary_1048576 4898703 ns 6854079 ns BM_StableSort_int16_Random_1 3.94 ns 3.49 ns BM_StableSort_int16_Random_4 20.8 ns 23.2 ns BM_StableSort_int16_Random_16 133 ns 163 ns BM_StableSort_int16_Random_64 903 ns 953 ns BM_StableSort_int16_Random_256 5638 ns 6258 ns BM_StableSort_int16_Random_1024 3056 ns 34587 ns BM_StableSort_int16_Random_4096 10596 ns 168397 ns BM_StableSort_int16_Random_16384 49908 ns 753031 ns BM_StableSort_int16_Random_65536 444605 ns 3838368 ns BM_StableSort_int16_Random_262144 2419345 ns 15657285 ns BM_StableSort_int16_Random_524288 7984040 ns 32726933 ns BM_StableSort_int16_Random_1048576 16092424 ns 67999766 ns BM_StableSort_int16_Ascending_1 3.40 ns 3.43 ns BM_StableSort_int16_Ascending_4 5.45 ns 5.79 ns BM_StableSort_int16_Ascending_16 12.0 ns 15.3 ns BM_StableSort_int16_Ascending_64 39.6 ns 52.6 ns BM_StableSort_int16_Ascending_256 470 ns 550 ns BM_StableSort_int16_Ascending_1024 1686 ns 2707 ns BM_StableSort_int16_Ascending_4096 5676 ns 14165 ns BM_StableSort_int16_Ascending_16384 21413 ns 69483 ns BM_StableSort_int16_Ascending_65536 88010 ns 334466 ns BM_StableSort_int16_Ascending_262144 567239 ns 1570620 ns BM_StableSort_int16_Ascending_524288 1553063 ns 3424666 ns BM_StableSort_int16_Ascending_1048576 3145577 ns 8499649 ns BM_StableSort_int16_Descending_1 3.22 ns 3.54 ns BM_StableSort_int16_Descending_4 6.85 ns 10.2 ns BM_StableSort_int16_Descending_16 62.7 ns 62.2 ns BM_StableSort_int16_Descending_64 1138 ns 1036 ns BM_StableSort_int16_Descending_256 5541 ns 4696 ns BM_StableSort_int16_Descending_1024 3046 ns 19577 ns BM_StableSort_int16_Descending_4096 10962 ns 79149 ns BM_StableSort_int16_Descending_16384 58182 ns 327709 ns BM_StableSort_int16_Descending_65536 447025 ns 1424896 ns BM_StableSort_int16_Descending_262144 1104973 ns 5921903 ns BM_StableSort_int16_Descending_524288 2547840 ns 17956789 ns BM_StableSort_int16_Descending_1048576 5093555 ns 17044318 ns BM_StableSort_int16_SingleElement_1 3.56 ns 3.96 ns BM_StableSort_int16_SingleElement_4 5.75 ns 6.72 ns BM_StableSort_int16_SingleElement_16 12.4 ns 16.1 ns BM_StableSort_int16_SingleElement_64 36.9 ns 54.4 ns BM_StableSort_int16_SingleElement_256 473 ns 557 ns BM_StableSort_int16_SingleElement_1024 1828 ns 2826 ns BM_StableSort_int16_SingleElement_4096 6239 ns 14252 ns BM_StableSort_int16_SingleElement_16384 23695 ns 70369 ns BM_StableSort_int16_SingleElement_65536 93281 ns 361641 ns BM_StableSort_int16_SingleElement_262144 599078 ns 1640216 ns BM_StableSort_int16_SingleElement_524288 1659678 ns 3343087 ns BM_StableSort_int16_SingleElement_1048576 3184033 ns 7770271 ns BM_StableSort_int16_PipeOrgan_1 3.75 ns 3.76 ns BM_StableSort_int16_PipeOrgan_4 5.94 ns 7.74 ns BM_StableSort_int16_PipeOrgan_16 26.7 ns 25.9 ns BM_StableSort_int16_PipeOrgan_64 300 ns 263 ns BM_StableSort_int16_PipeOrgan_256 2769 ns 2760 ns BM_StableSort_int16_PipeOrgan_1024 2996 ns 10544 ns BM_StableSort_int16_PipeOrgan_4096 11641 ns 44750 ns BM_StableSort_int16_PipeOrgan_16384 57224 ns 200464 ns BM_StableSort_int16_PipeOrgan_65536 416873 ns 887631 ns BM_StableSort_int16_PipeOrgan_262144 843264 ns 3588669 ns BM_StableSort_int16_PipeOrgan_524288 2027741 ns 11056924 ns BM_StableSort_int16_PipeOrgan_1048576 4223773 ns 13261276 ns BM_StableSort_int16_QuickSortAdversary_1 3.83 ns 3.68 ns BM_StableSort_int16_QuickSortAdversary_4 5.55 ns 6.93 ns BM_StableSort_int16_QuickSortAdversary_16 12.3 ns 15.2 ns BM_StableSort_int16_QuickSortAdversary_64 646 ns 632 ns BM_StableSort_int16_QuickSortAdversary_256 2751 ns 2542 ns BM_StableSort_int16_QuickSortAdversary_1024 3028 ns 16901 ns BM_StableSort_int16_QuickSortAdversary_4096 10862 ns 80222 ns BM_StableSort_int16_QuickSortAdversary_16384 57753 ns 317281 ns BM_StableSort_int16_QuickSortAdversary_65536 94064 ns 328502 ns BM_StableSort_int16_QuickSortAdversary_262144 557796 ns 1613208 ns BM_StableSort_int16_QuickSortAdversary_524288 1518451 ns 3479740 ns BM_StableSort_int16_QuickSortAdversary_1048576 3165129 ns 7655880 ns BM_StableSort_uint16_Random_1 3.26 ns 3.44 ns BM_StableSort_uint16_Random_4 21.1 ns 22.2 ns BM_StableSort_uint16_Random_16 157 ns 156 ns BM_StableSort_uint16_Random_64 955 ns 947 ns BM_StableSort_uint16_Random_256 5886 ns 6097 ns BM_StableSort_uint16_Random_1024 2787 ns 30776 ns BM_StableSort_uint16_Random_4096 9973 ns 155652 ns BM_StableSort_uint16_Random_16384 48628 ns 741072 ns BM_StableSort_uint16_Random_65536 439609 ns 3478966 ns BM_StableSort_uint16_Random_262144 2336983 ns 15197642 ns BM_StableSort_uint16_Random_524288 7888701 ns 34234254 ns BM_StableSort_uint16_Random_1048576 14865180 ns 68516386 ns BM_StableSort_uint16_Ascending_1 3.33 ns 4.00 ns BM_StableSort_uint16_Ascending_4 5.79 ns 6.64 ns BM_StableSort_uint16_Ascending_16 14.9 ns 15.5 ns BM_StableSort_uint16_Ascending_64 50.2 ns 52.5 ns BM_StableSort_uint16_Ascending_256 538 ns 546 ns BM_StableSort_uint16_Ascending_1024 1645 ns 2652 ns BM_StableSort_uint16_Ascending_4096 5559 ns 14517 ns BM_StableSort_uint16_Ascending_16384 22803 ns 70275 ns BM_StableSort_uint16_Ascending_65536 83109 ns 333446 ns BM_StableSort_uint16_Ascending_262144 562667 ns 1568670 ns BM_StableSort_uint16_Ascending_524288 1564646 ns 3059839 ns BM_StableSort_uint16_Ascending_1048576 3178826 ns 7048327 ns BM_StableSort_uint16_Descending_1 3.34 ns 3.93 ns BM_StableSort_uint16_Descending_4 8.75 ns 9.73 ns BM_StableSort_uint16_Descending_16 55.9 ns 55.5 ns BM_StableSort_uint16_Descending_64 1021 ns 1035 ns BM_StableSort_uint16_Descending_256 4752 ns 4931 ns BM_StableSort_uint16_Descending_1024 2982 ns 19727 ns BM_StableSort_uint16_Descending_4096 10432 ns 83165 ns BM_StableSort_uint16_Descending_16384 56593 ns 326131 ns BM_StableSort_uint16_Descending_65536 439134 ns 1371346 ns BM_StableSort_uint16_Descending_262144 1220925 ns 5735665 ns BM_StableSort_uint16_Descending_524288 2767234 ns 16758330 ns BM_StableSort_uint16_Descending_1048576 5673769 ns 17541715 ns BM_StableSort_uint16_SingleElement_1 3.53 ns 3.73 ns BM_StableSort_uint16_SingleElement_4 6.27 ns 5.81 ns BM_StableSort_uint16_SingleElement_16 14.8 ns 15.1 ns BM_StableSort_uint16_SingleElement_64 51.5 ns 50.9 ns BM_StableSort_uint16_SingleElement_256 536 ns 540 ns BM_StableSort_uint16_SingleElement_1024 1669 ns 2690 ns BM_StableSort_uint16_SingleElement_4096 5840 ns 14230 ns BM_StableSort_uint16_SingleElement_16384 22468 ns 68524 ns BM_StableSort_uint16_SingleElement_65536 89845 ns 332187 ns BM_StableSort_uint16_SingleElement_262144 590736 ns 1550868 ns BM_StableSort_uint16_SingleElement_524288 1573677 ns 3095703 ns BM_StableSort_uint16_SingleElement_1048576 3183421 ns 8251180 ns BM_StableSort_uint16_PipeOrgan_1 3.70 ns 3.64 ns BM_StableSort_uint16_PipeOrgan_4 7.01 ns 6.81 ns BM_StableSort_uint16_PipeOrgan_16 25.7 ns 26.4 ns BM_StableSort_uint16_PipeOrgan_64 283 ns 277 ns BM_StableSort_uint16_PipeOrgan_256 2562 ns 2852 ns BM_StableSort_uint16_PipeOrgan_1024 2863 ns 10892 ns BM_StableSort_uint16_PipeOrgan_4096 10585 ns 45668 ns BM_StableSort_uint16_PipeOrgan_16384 59151 ns 194358 ns BM_StableSort_uint16_PipeOrgan_65536 508579 ns 854692 ns BM_StableSort_uint16_PipeOrgan_262144 901294 ns 3606346 ns BM_StableSort_uint16_PipeOrgan_524288 2192498 ns 10449279 ns BM_StableSort_uint16_PipeOrgan_1048576 4204368 ns 11956606 ns BM_StableSort_uint16_QuickSortAdversary_1 3.20 ns 3.63 ns BM_StableSort_uint16_QuickSortAdversary_4 5.30 ns 6.38 ns BM_StableSort_uint16_QuickSortAdversary_16 14.5 ns 15.3 ns BM_StableSort_uint16_QuickSortAdversary_64 575 ns 611 ns BM_StableSort_uint16_QuickSortAdversary_256 2423 ns 2577 ns BM_StableSort_uint16_QuickSortAdversary_1024 2794 ns 16854 ns BM_StableSort_uint16_QuickSortAdversary_4096 10511 ns 75952 ns BM_StableSort_uint16_QuickSortAdversary_16384 56214 ns 333824 ns BM_StableSort_uint16_QuickSortAdversary_65536 422512 ns 1354867 ns BM_StableSort_uint16_QuickSortAdversary_262144 583301 ns 1564443 ns BM_StableSort_uint16_QuickSortAdversary_524288 1584319 ns 3265575 ns BM_StableSort_uint16_QuickSortAdversary_1048576 3197732 ns 7945245 ns BM_StableSort_int32_Random_1 3.81 ns 3.70 ns BM_StableSort_int32_Random_4 20.8 ns 23.4 ns BM_StableSort_int32_Random_16 134 ns 161 ns BM_StableSort_int32_Random_64 895 ns 984 ns BM_StableSort_int32_Random_256 5640 ns 5897 ns BM_StableSort_int32_Random_1024 6994 ns 32118 ns BM_StableSort_int32_Random_4096 27367 ns 168960 ns BM_StableSort_int32_Random_16384 183261 ns 843240 ns BM_StableSort_int32_Random_65536 950914 ns 3953588 ns BM_StableSort_int32_Random_262144 3673311 ns 16790171 ns BM_StableSort_int32_Random_524288 11515700 ns 36023098 ns BM_StableSort_int32_Random_1048576 24492515 ns 78116028 ns BM_StableSort_int32_Ascending_1 3.31 ns 4.48 ns BM_StableSort_int32_Ascending_4 5.96 ns 6.99 ns BM_StableSort_int32_Ascending_16 13.0 ns 16.0 ns BM_StableSort_int32_Ascending_64 36.7 ns 53.0 ns BM_StableSort_int32_Ascending_256 391 ns 471 ns BM_StableSort_int32_Ascending_1024 2705 ns 2682 ns BM_StableSort_int32_Ascending_4096 8773 ns 14231 ns BM_StableSort_int32_Ascending_16384 34709 ns 70625 ns BM_StableSort_int32_Ascending_65536 142907 ns 344482 ns BM_StableSort_int32_Ascending_262144 745483 ns 1591418 ns BM_StableSort_int32_Ascending_524288 1873701 ns 3190305 ns BM_StableSort_int32_Ascending_1048576 3851590 ns 7570095 ns BM_StableSort_int32_Descending_1 3.22 ns 4.23 ns BM_StableSort_int32_Descending_4 7.58 ns 11.2 ns BM_StableSort_int32_Descending_16 63.9 ns 58.6 ns BM_StableSort_int32_Descending_64 1133 ns 1017 ns BM_StableSort_int32_Descending_256 4850 ns 4464 ns BM_StableSort_int32_Descending_1024 7023 ns 18954 ns BM_StableSort_int32_Descending_4096 28550 ns 75163 ns BM_StableSort_int32_Descending_16384 200880 ns 341104 ns BM_StableSort_int32_Descending_65536 1095910 ns 1398021 ns BM_StableSort_int32_Descending_262144 3818864 ns 5695486 ns BM_StableSort_int32_Descending_524288 5606779 ns 17593982 ns BM_StableSort_int32_Descending_1048576 16416366 ns 26649503 ns BM_StableSort_int32_SingleElement_1 3.81 ns 3.71 ns BM_StableSort_int32_SingleElement_4 6.57 ns 6.61 ns BM_StableSort_int32_SingleElement_16 14.0 ns 15.8 ns BM_StableSort_int32_SingleElement_64 38.7 ns 53.5 ns BM_StableSort_int32_SingleElement_256 386 ns 554 ns BM_StableSort_int32_SingleElement_1024 2761 ns 3046 ns BM_StableSort_int32_SingleElement_4096 9179 ns 15188 ns BM_StableSort_int32_SingleElement_16384 34794 ns 70119 ns BM_StableSort_int32_SingleElement_65536 135190 ns 354755 ns BM_StableSort_int32_SingleElement_262144 760995 ns 1644072 ns BM_StableSort_int32_SingleElement_524288 1969575 ns 3343419 ns BM_StableSort_int32_SingleElement_1048576 4423816 ns 8346971 ns BM_StableSort_int32_PipeOrgan_1 3.79 ns 3.63 ns BM_StableSort_int32_PipeOrgan_4 6.21 ns 6.73 ns BM_StableSort_int32_PipeOrgan_16 27.5 ns 26.0 ns BM_StableSort_int32_PipeOrgan_64 291 ns 265 ns BM_StableSort_int32_PipeOrgan_256 2557 ns 2518 ns BM_StableSort_int32_PipeOrgan_1024 6765 ns 10976 ns BM_StableSort_int32_PipeOrgan_4096 26373 ns 44537 ns BM_StableSort_int32_PipeOrgan_16384 201466 ns 188582 ns BM_StableSort_int32_PipeOrgan_65536 1148533 ns 802368 ns BM_StableSort_int32_PipeOrgan_262144 2255177 ns 3477829 ns BM_StableSort_int32_PipeOrgan_524288 3947015 ns 10356637 ns BM_StableSort_int32_PipeOrgan_1048576 10274312 ns 16405366 ns BM_StableSort_int32_QuickSortAdversary_1 3.32 ns 4.36 ns BM_StableSort_int32_QuickSortAdversary_4 5.98 ns 7.44 ns BM_StableSort_int32_QuickSortAdversary_16 13.0 ns 16.3 ns BM_StableSort_int32_QuickSortAdversary_64 657 ns 616 ns BM_StableSort_int32_QuickSortAdversary_256 2569 ns 2483 ns BM_StableSort_int32_QuickSortAdversary_1024 6898 ns 19635 ns BM_StableSort_int32_QuickSortAdversary_4096 27092 ns 75108 ns BM_StableSort_int32_QuickSortAdversary_16384 190379 ns 316463 ns BM_StableSort_int32_QuickSortAdversary_65536 1109040 ns 1319018 ns BM_StableSort_int32_QuickSortAdversary_262144 4361925 ns 5472779 ns BM_StableSort_int32_QuickSortAdversary_524288 6528215 ns 17538983 ns BM_StableSort_int32_QuickSortAdversary_1048576 18345325 ns 27223926 ns BM_StableSort_uint32_Random_1 3.67 ns 3.82 ns BM_StableSort_uint32_Random_4 22.3 ns 21.8 ns BM_StableSort_uint32_Random_16 155 ns 153 ns BM_StableSort_uint32_Random_64 946 ns 976 ns BM_StableSort_uint32_Random_256 5824 ns 6019 ns BM_StableSort_uint32_Random_1024 4525 ns 32764 ns BM_StableSort_uint32_Random_4096 17223 ns 158608 ns BM_StableSort_uint32_Random_16384 134821 ns 748525 ns BM_StableSort_uint32_Random_65536 716644 ns 3453325 ns BM_StableSort_uint32_Random_262144 3628062 ns 16065414 ns BM_StableSort_uint32_Random_524288 10971334 ns 36567712 ns BM_StableSort_uint32_Random_1048576 22688377 ns 77533497 ns BM_StableSort_uint32_Ascending_1 3.57 ns 3.44 ns BM_StableSort_uint32_Ascending_4 5.73 ns 5.33 ns BM_StableSort_uint32_Ascending_16 14.5 ns 14.0 ns BM_StableSort_uint32_Ascending_64 50.3 ns 51.3 ns BM_StableSort_uint32_Ascending_256 465 ns 467 ns BM_StableSort_uint32_Ascending_1024 3042 ns 2530 ns BM_StableSort_uint32_Ascending_4096 9842 ns 12207 ns BM_StableSort_uint32_Ascending_16384 37994 ns 61726 ns BM_StableSort_uint32_Ascending_65536 148890 ns 294385 ns BM_StableSort_uint32_Ascending_262144 855080 ns 1422167 ns BM_StableSort_uint32_Ascending_524288 2154903 ns 3203018 ns BM_StableSort_uint32_Ascending_1048576 5002518 ns 7563817 ns BM_StableSort_uint32_Descending_1 3.51 ns 3.40 ns BM_StableSort_uint32_Descending_4 9.09 ns 7.95 ns BM_StableSort_uint32_Descending_16 54.8 ns 74.4 ns BM_StableSort_uint32_Descending_64 1003 ns 1305 ns BM_StableSort_uint32_Descending_256 4545 ns 5300 ns BM_StableSort_uint32_Descending_1024 4361 ns 21884 ns BM_StableSort_uint32_Descending_4096 16018 ns 90534 ns BM_StableSort_uint32_Descending_16384 146274 ns 381943 ns BM_StableSort_uint32_Descending_65536 938248 ns 1536806 ns BM_StableSort_uint32_Descending_262144 3899300 ns 6387843 ns BM_StableSort_uint32_Descending_524288 5808157 ns 21959858 ns BM_StableSort_uint32_Descending_1048576 17520047 ns 26351912 ns BM_StableSort_uint32_SingleElement_1 4.03 ns 3.97 ns BM_StableSort_uint32_SingleElement_4 6.55 ns 6.41 ns BM_StableSort_uint32_SingleElement_16 15.6 ns 15.8 ns BM_StableSort_uint32_SingleElement_64 52.3 ns 58.7 ns BM_StableSort_uint32_SingleElement_256 473 ns 485 ns BM_StableSort_uint32_SingleElement_1024 3020 ns 2407 ns BM_StableSort_uint32_SingleElement_4096 9998 ns 12527 ns BM_StableSort_uint32_SingleElement_16384 38072 ns 62228 ns BM_StableSort_uint32_SingleElement_65536 153706 ns 295662 ns BM_StableSort_uint32_SingleElement_262144 836532 ns 1477099 ns BM_StableSort_uint32_SingleElement_524288 2144900 ns 3157204 ns BM_StableSort_uint32_SingleElement_1048576 4995525 ns 7617233 ns BM_StableSort_uint32_PipeOrgan_1 4.02 ns 3.99 ns BM_StableSort_uint32_PipeOrgan_4 6.97 ns 6.84 ns BM_StableSort_uint32_PipeOrgan_16 26.1 ns 29.7 ns BM_StableSort_uint32_PipeOrgan_64 266 ns 333 ns BM_StableSort_uint32_PipeOrgan_256 2462 ns 2892 ns BM_StableSort_uint32_PipeOrgan_1024 4291 ns 12431 ns BM_StableSort_uint32_PipeOrgan_4096 15638 ns 51449 ns BM_StableSort_uint32_PipeOrgan_16384 154563 ns 217460 ns BM_StableSort_uint32_PipeOrgan_65536 907724 ns 925873 ns BM_StableSort_uint32_PipeOrgan_262144 2394580 ns 4103575 ns BM_StableSort_uint32_PipeOrgan_524288 4177145 ns 13947158 ns BM_StableSort_uint32_PipeOrgan_1048576 11848224 ns 18807297 ns BM_StableSort_uint32_QuickSortAdversary_1 3.50 ns 3.43 ns BM_StableSort_uint32_QuickSortAdversary_4 5.88 ns 4.96 ns BM_StableSort_uint32_QuickSortAdversary_16 14.6 ns 14.0 ns BM_StableSort_uint32_QuickSortAdversary_64 576 ns 715 ns BM_StableSort_uint32_QuickSortAdversary_256 2353 ns 2797 ns BM_StableSort_uint32_QuickSortAdversary_1024 4176 ns 21775 ns BM_StableSort_uint32_QuickSortAdversary_4096 15565 ns 96188 ns BM_StableSort_uint32_QuickSortAdversary_16384 149092 ns 398332 ns BM_StableSort_uint32_QuickSortAdversary_65536 902488 ns 1552393 ns BM_StableSort_uint32_QuickSortAdversary_262144 3946517 ns 6560414 ns BM_StableSort_uint32_QuickSortAdversary_524288 6247114 ns 22420977 ns BM_StableSort_uint32_QuickSortAdversary_1048576 19892446 ns 26529576 ns BM_StableSort_int64_Random_1 3.83 ns 3.98 ns BM_StableSort_int64_Random_4 21.1 ns 24.0 ns BM_StableSort_int64_Random_16 129 ns 136 ns BM_StableSort_int64_Random_64 890 ns 906 ns BM_StableSort_int64_Random_256 5542 ns 5901 ns BM_StableSort_int64_Random_1024 16085 ns 33112 ns BM_StableSort_int64_Random_4096 63895 ns 162181 ns BM_StableSort_int64_Random_16384 348827 ns 790045 ns BM_StableSort_int64_Random_65536 1488237 ns 3557506 ns BM_StableSort_int64_Random_262144 8195713 ns 16315808 ns BM_StableSort_int64_Random_524288 16586833 ns 38274075 ns BM_StableSort_int64_Random_1048576 40346644 ns 79182089 ns BM_StableSort_int64_Ascending_1 3.76 ns 3.55 ns BM_StableSort_int64_Ascending_4 5.82 ns 6.19 ns BM_StableSort_int64_Ascending_16 11.7 ns 11.8 ns BM_StableSort_int64_Ascending_64 32.9 ns 36.8 ns BM_StableSort_int64_Ascending_256 415 ns 550 ns BM_StableSort_int64_Ascending_1024 5352 ns 3347 ns BM_StableSort_int64_Ascending_4096 17516 ns 19134 ns BM_StableSort_int64_Ascending_16384 64147 ns 91099 ns BM_StableSort_int64_Ascending_65536 322126 ns 434009 ns BM_StableSort_int64_Ascending_262144 1554669 ns 2057056 ns BM_StableSort_int64_Ascending_524288 3656527 ns 5016650 ns BM_StableSort_int64_Ascending_1048576 10469979 ns 12908613 ns BM_StableSort_int64_Descending_1 4.09 ns 3.35 ns BM_StableSort_int64_Descending_4 9.13 ns 8.01 ns BM_StableSort_int64_Descending_16 76.8 ns 92.9 ns BM_StableSort_int64_Descending_64 1336 ns 1417 ns BM_StableSort_int64_Descending_256 5525 ns 5674 ns BM_StableSort_int64_Descending_1024 17461 ns 22558 ns BM_StableSort_int64_Descending_4096 64285 ns 102360 ns BM_StableSort_int64_Descending_16384 336946 ns 388940 ns BM_StableSort_int64_Descending_65536 837912 ns 1662169 ns BM_StableSort_int64_Descending_262144 3680806 ns 7494323 ns BM_StableSort_int64_Descending_524288 11023784 ns 24935033 ns BM_StableSort_int64_Descending_1048576 20023568 ns 33220712 ns BM_StableSort_int64_SingleElement_1 3.37 ns 3.98 ns BM_StableSort_int64_SingleElement_4 5.32 ns 6.92 ns BM_StableSort_int64_SingleElement_16 10.9 ns 13.3 ns BM_StableSort_int64_SingleElement_64 32.1 ns 43.8 ns BM_StableSort_int64_SingleElement_256 420 ns 541 ns BM_StableSort_int64_SingleElement_1024 5689 ns 3381 ns BM_StableSort_int64_SingleElement_4096 19199 ns 17989 ns BM_StableSort_int64_SingleElement_16384 75754 ns 91963 ns BM_StableSort_int64_SingleElement_65536 357106 ns 500326 ns BM_StableSort_int64_SingleElement_262144 1672975 ns 2417734 ns BM_StableSort_int64_SingleElement_524288 3642891 ns 5200878 ns BM_StableSort_int64_SingleElement_1048576 11172007 ns 13729511 ns BM_StableSort_int64_PipeOrgan_1 3.38 ns 3.94 ns BM_StableSort_int64_PipeOrgan_4 5.73 ns 6.44 ns BM_StableSort_int64_PipeOrgan_16 27.5 ns 29.0 ns BM_StableSort_int64_PipeOrgan_64 310 ns 321 ns BM_StableSort_int64_PipeOrgan_256 2761 ns 2918 ns BM_StableSort_int64_PipeOrgan_1024 16105 ns 12525 ns BM_StableSort_int64_PipeOrgan_4096 65289 ns 59990 ns BM_StableSort_int64_PipeOrgan_16384 341757 ns 270636 ns BM_StableSort_int64_PipeOrgan_65536 587452 ns 1126132 ns BM_StableSort_int64_PipeOrgan_262144 2837955 ns 5034180 ns BM_StableSort_int64_PipeOrgan_524288 6617313 ns 15267354 ns BM_StableSort_int64_PipeOrgan_1048576 15208796 ns 23162989 ns BM_StableSort_int64_QuickSortAdversary_1 3.77 ns 3.45 ns BM_StableSort_int64_QuickSortAdversary_4 5.55 ns 5.20 ns BM_StableSort_int64_QuickSortAdversary_16 12.5 ns 11.5 ns BM_StableSort_int64_QuickSortAdversary_64 646 ns 750 ns BM_StableSort_int64_QuickSortAdversary_256 2655 ns 3539 ns BM_StableSort_int64_QuickSortAdversary_1024 16373 ns 22349 ns BM_StableSort_int64_QuickSortAdversary_4096 62306 ns 97248 ns BM_StableSort_int64_QuickSortAdversary_16384 321755 ns 388084 ns BM_StableSort_int64_QuickSortAdversary_65536 1374694 ns 1596091 ns BM_StableSort_int64_QuickSortAdversary_262144 4374661 ns 6894139 ns BM_StableSort_int64_QuickSortAdversary_524288 12736074 ns 23932229 ns BM_StableSort_int64_QuickSortAdversary_1048576 22615219 ns 33355629 ns BM_StableSort_uint64_Random_1 3.82 ns 3.49 ns BM_StableSort_uint64_Random_4 22.4 ns 23.4 ns BM_StableSort_uint64_Random_16 154 ns 146 ns BM_StableSort_uint64_Random_64 924 ns 926 ns BM_StableSort_uint64_Random_256 5864 ns 5913 ns BM_StableSort_uint64_Random_1024 7168 ns 31746 ns BM_StableSort_uint64_Random_4096 27668 ns 154224 ns BM_StableSort_uint64_Random_16384 219526 ns 755205 ns BM_StableSort_uint64_Random_65536 965251 ns 3490165 ns BM_StableSort_uint64_Random_262144 6262162 ns 15889589 ns BM_StableSort_uint64_Random_524288 12530078 ns 36458581 ns BM_StableSort_uint64_Random_1048576 38462191 ns 75168445 ns BM_StableSort_uint64_Ascending_1 3.30 ns 3.35 ns BM_StableSort_uint64_Ascending_4 5.65 ns 5.84 ns BM_StableSort_uint64_Ascending_16 14.7 ns 12.6 ns BM_StableSort_uint64_Ascending_64 55.3 ns 34.6 ns BM_StableSort_uint64_Ascending_256 513 ns 533 ns BM_StableSort_uint64_Ascending_1024 5541 ns 3189 ns BM_StableSort_uint64_Ascending_4096 17706 ns 20326 ns BM_StableSort_uint64_Ascending_16384 66420 ns 93757 ns BM_StableSort_uint64_Ascending_65536 341425 ns 435016 ns BM_StableSort_uint64_Ascending_262144 1595691 ns 2088317 ns BM_StableSort_uint64_Ascending_524288 3808703 ns 5092832 ns BM_StableSort_uint64_Ascending_1048576 11060417 ns 13023250 ns BM_StableSort_uint64_Descending_1 3.29 ns 3.35 ns BM_StableSort_uint64_Descending_4 8.65 ns 7.92 ns BM_StableSort_uint64_Descending_16 54.7 ns 80.2 ns BM_StableSort_uint64_Descending_64 1028 ns 1307 ns BM_StableSort_uint64_Descending_256 4521 ns 5635 ns BM_StableSort_uint64_Descending_1024 7122 ns 23323 ns BM_StableSort_uint64_Descending_4096 30538 ns 95892 ns BM_StableSort_uint64_Descending_16384 195565 ns 392721 ns BM_StableSort_uint64_Descending_65536 852002 ns 1720358 ns BM_StableSort_uint64_Descending_262144 3737884 ns 7484130 ns BM_StableSort_uint64_Descending_524288 11159345 ns 25690770 ns BM_StableSort_uint64_Descending_1048576 20648864 ns 33057383 ns BM_StableSort_uint64_SingleElement_1 3.62 ns 4.10 ns BM_StableSort_uint64_SingleElement_4 6.73 ns 6.64 ns BM_StableSort_uint64_SingleElement_16 14.9 ns 11.3 ns BM_StableSort_uint64_SingleElement_64 52.0 ns 33.0 ns BM_StableSort_uint64_SingleElement_256 511 ns 582 ns BM_StableSort_uint64_SingleElement_1024 6499 ns 3287 ns BM_StableSort_uint64_SingleElement_4096 22190 ns 17616 ns BM_StableSort_uint64_SingleElement_16384 84378 ns 86885 ns BM_StableSort_uint64_SingleElement_65536 466257 ns 457144 ns BM_StableSort_uint64_SingleElement_262144 1993687 ns 2361999 ns BM_StableSort_uint64_SingleElement_524288 4759565 ns 5096771 ns BM_StableSort_uint64_SingleElement_1048576 12426111 ns 13468453 ns BM_StableSort_uint64_PipeOrgan_1 3.73 ns 3.94 ns BM_StableSort_uint64_PipeOrgan_4 7.18 ns 7.54 ns BM_StableSort_uint64_PipeOrgan_16 25.2 ns 29.1 ns BM_StableSort_uint64_PipeOrgan_64 260 ns 321 ns BM_StableSort_uint64_PipeOrgan_256 2468 ns 2970 ns BM_StableSort_uint64_PipeOrgan_1024 7025 ns 12912 ns BM_StableSort_uint64_PipeOrgan_4096 28968 ns 53379 ns BM_StableSort_uint64_PipeOrgan_16384 194156 ns 239790 ns BM_StableSort_uint64_PipeOrgan_65536 599491 ns 993800 ns BM_StableSort_uint64_PipeOrgan_262144 2648585 ns 4689680 ns BM_StableSort_uint64_PipeOrgan_524288 7621109 ns 15401808 ns BM_StableSort_uint64_PipeOrgan_1048576 15608814 ns 23484821 ns BM_StableSort_uint64_QuickSortAdversary_1 3.38 ns 3.54 ns BM_StableSort_uint64_QuickSortAdversary_4 5.50 ns 6.03 ns BM_StableSort_uint64_QuickSortAdversary_16 14.2 ns 11.0 ns BM_StableSort_uint64_QuickSortAdversary_64 597 ns 688 ns BM_StableSort_uint64_QuickSortAdversary_256 2446 ns 2818 ns BM_StableSort_uint64_QuickSortAdversary_1024 7266 ns 20319 ns BM_StableSort_uint64_QuickSortAdversary_4096 31155 ns 89112 ns BM_StableSort_uint64_QuickSortAdversary_16384 201033 ns 390574 ns BM_StableSort_uint64_QuickSortAdversary_65536 871014 ns 1685639 ns BM_StableSort_uint64_QuickSortAdversary_262144 3978535 ns 7265830 ns BM_StableSort_uint64_QuickSortAdversary_524288 10279721 ns 25350004 ns BM_StableSort_uint64_QuickSortAdversary_1048576 20256585 ns 33054393 ns ```	2025-01-09 19:02:35 +01:00
Nikolas Klauser	e99c4906e4	[libc++] Granularize <cstddef> includes (#108696)	2024-10-31 02:20:10 +01:00
Louis Dionne	09e3a36058	[libc++][modules] Fix missing and incorrect includes (#108850) ... This patch adds a large number of missing includes in the libc++ headers and the test suite. Those were found as part of the effort to move towards a mostly monolithic top-level std module.	2024-09-16 15:06:20 -04:00
A. Jiang	94e7c0b051	[libc++] Remove get_temporary_buffer and return_temporary_buffer (#100914) ... Works towards P0619R4 / #99985. The use of `std::get_temporary_buffer` and `std::return_temporary_buffer` are replaced with `unique_ptr`-based RAII buffer holder. Escape hatches: - `_LIBCPP_ENABLE_CXX20_REMOVED_TEMPORARY_BUFFER` restores `std::get_temporary_buffer` and `std::return_temporary_buffer`. Drive-by changes: - In `<syncstream>`, states that `get_temporary_buffer` is now removed, because `<syncstream>` is added in C++20.	2024-09-16 11:53:05 -04:00
Louis Dionne	f73050e722	[libc++] Fix several double-moves in the code base (#104616) ... This patch hardens the "test iterators" we use to test algorithms by ensuring that they don't get double-moved. As a result of this hardening, the tests started reporting multiple failures where we would double-move iterators, which are being fixed in this patch. In particular: - Fixed a double-move in pstl.partition - Add coverage for begin()/end() in subrange tests - Fix tests for ranges::ends_with and ranges::contains, which were incorrectly calling begin() twice on the same subrange containing non-copyable input iterators. Fixes #100709	2024-08-20 14:36:11 -04:00
Louis Dionne	257831582c	[libc++] Check correctly ref-qualified __is_callable in algorithms (#101553) ... We were only checking that the comparator was rvalue callable, when in reality the algorithms always call comparators as lvalues. This patch also refactors the tests for callable requirements and expands it to a few missing algorithms. This is take 2 of #73451, which was reverted because it broke some CI bots. The issue was that we checked __is_callable with arguments in the wrong order inside std::upper_bound. This has now been fixed and a test was added. Fixes #69554	2024-08-05 11:23:06 -04:00
Nikolas Klauser	d07fdf9779	[libc++] Optimize lexicographical_compare (#65279) ... If the comparison operation is equivalent to < and that is a total order, we know that we can use equality comparison on that type instead to extract some information. Furthermore, if equality comparison on that type is trivial, the user can't observe that we're calling it. So instead of using the user-provided total order, we use std::mismatch, which uses equality comparison (and is vertorized). Additionally, if the type is trivially lexicographically comparable, we can go one step further and use std::memcmp directly instead of calling std::mismatch. Benchmarks: ``` ------------------------------------------------------------------------------------- Benchmark old new ------------------------------------------------------------------------------------- bm_lexicographical_compare<unsigned char>/1 1.17 ns 2.34 ns bm_lexicographical_compare<unsigned char>/2 1.64 ns 2.57 ns bm_lexicographical_compare<unsigned char>/3 2.23 ns 2.58 ns bm_lexicographical_compare<unsigned char>/4 2.82 ns 2.57 ns bm_lexicographical_compare<unsigned char>/5 3.34 ns 2.11 ns bm_lexicographical_compare<unsigned char>/6 3.94 ns 2.21 ns bm_lexicographical_compare<unsigned char>/7 4.56 ns 2.11 ns bm_lexicographical_compare<unsigned char>/8 5.25 ns 2.11 ns bm_lexicographical_compare<unsigned char>/16 9.88 ns 2.11 ns bm_lexicographical_compare<unsigned char>/64 38.9 ns 2.36 ns bm_lexicographical_compare<unsigned char>/512 317 ns 6.54 ns bm_lexicographical_compare<unsigned char>/4096 2517 ns 41.4 ns bm_lexicographical_compare<unsigned char>/32768 20052 ns 488 ns bm_lexicographical_compare<unsigned char>/262144 159579 ns 4409 ns bm_lexicographical_compare<unsigned char>/1048576 640456 ns 20342 ns bm_lexicographical_compare<signed char>/1 1.18 ns 2.37 ns bm_lexicographical_compare<signed char>/2 1.65 ns 2.60 ns bm_lexicographical_compare<signed char>/3 2.23 ns 2.83 ns bm_lexicographical_compare<signed char>/4 2.81 ns 3.06 ns bm_lexicographical_compare<signed char>/5 3.35 ns 3.30 ns bm_lexicographical_compare<signed char>/6 3.90 ns 3.99 ns bm_lexicographical_compare<signed char>/7 4.56 ns 3.78 ns bm_lexicographical_compare<signed char>/8 5.20 ns 4.02 ns bm_lexicographical_compare<signed char>/16 9.80 ns 6.21 ns bm_lexicographical_compare<signed char>/64 39.0 ns 3.16 ns bm_lexicographical_compare<signed char>/512 318 ns 7.58 ns bm_lexicographical_compare<signed char>/4096 2514 ns 47.4 ns bm_lexicographical_compare<signed char>/32768 20096 ns 504 ns bm_lexicographical_compare<signed char>/262144 156617 ns 4146 ns bm_lexicographical_compare<signed char>/1048576 624265 ns 19810 ns bm_lexicographical_compare<int>/1 1.15 ns 2.12 ns bm_lexicographical_compare<int>/2 1.60 ns 2.36 ns bm_lexicographical_compare<int>/3 2.21 ns 2.59 ns bm_lexicographical_compare<int>/4 2.74 ns 2.83 ns bm_lexicographical_compare<int>/5 3.26 ns 3.06 ns bm_lexicographical_compare<int>/6 3.81 ns 4.53 ns bm_lexicographical_compare<int>/7 4.41 ns 4.72 ns bm_lexicographical_compare<int>/8 5.08 ns 2.36 ns bm_lexicographical_compare<int>/16 9.54 ns 3.08 ns bm_lexicographical_compare<int>/64 37.8 ns 4.71 ns bm_lexicographical_compare<int>/512 309 ns 24.6 ns bm_lexicographical_compare<int>/4096 2422 ns 204 ns bm_lexicographical_compare<int>/32768 19362 ns 1947 ns bm_lexicographical_compare<int>/262144 155727 ns 19793 ns bm_lexicographical_compare<int>/1048576 623614 ns 80180 ns bm_ranges_lexicographical_compare<unsigned char>/1 1.07 ns 2.35 ns bm_ranges_lexicographical_compare<unsigned char>/2 1.72 ns 2.13 ns bm_ranges_lexicographical_compare<unsigned char>/3 2.46 ns 2.12 ns bm_ranges_lexicographical_compare<unsigned char>/4 3.17 ns 2.12 ns bm_ranges_lexicographical_compare<unsigned char>/5 3.86 ns 2.12 ns bm_ranges_lexicographical_compare<unsigned char>/6 4.55 ns 2.12 ns bm_ranges_lexicographical_compare<unsigned char>/7 5.25 ns 2.12 ns bm_ranges_lexicographical_compare<unsigned char>/8 5.95 ns 2.13 ns bm_ranges_lexicographical_compare<unsigned char>/16 11.7 ns 2.13 ns bm_ranges_lexicographical_compare<unsigned char>/64 45.5 ns 2.36 ns bm_ranges_lexicographical_compare<unsigned char>/512 366 ns 6.35 ns bm_ranges_lexicographical_compare<unsigned char>/4096 2886 ns 40.9 ns bm_ranges_lexicographical_compare<unsigned char>/32768 23054 ns 489 ns bm_ranges_lexicographical_compare<unsigned char>/262144 185302 ns 4339 ns bm_ranges_lexicographical_compare<unsigned char>/1048576 741576 ns 19430 ns bm_ranges_lexicographical_compare<signed char>/1 1.10 ns 2.12 ns bm_ranges_lexicographical_compare<signed char>/2 1.66 ns 2.35 ns bm_ranges_lexicographical_compare<signed char>/3 2.23 ns 2.58 ns bm_ranges_lexicographical_compare<signed char>/4 2.82 ns 2.82 ns bm_ranges_lexicographical_compare<signed char>/5 3.34 ns 3.06 ns bm_ranges_lexicographical_compare<signed char>/6 3.92 ns 3.99 ns bm_ranges_lexicographical_compare<signed char>/7 4.64 ns 4.10 ns bm_ranges_lexicographical_compare<signed char>/8 5.21 ns 4.61 ns bm_ranges_lexicographical_compare<signed char>/16 9.79 ns 7.42 ns bm_ranges_lexicographical_compare<signed char>/64 38.9 ns 2.93 ns bm_ranges_lexicographical_compare<signed char>/512 317 ns 7.31 ns bm_ranges_lexicographical_compare<signed char>/4096 2500 ns 47.5 ns bm_ranges_lexicographical_compare<signed char>/32768 19940 ns 496 ns bm_ranges_lexicographical_compare<signed char>/262144 159166 ns 4393 ns bm_ranges_lexicographical_compare<signed char>/1048576 638206 ns 19786 ns bm_ranges_lexicographical_compare<int>/1 1.10 ns 2.12 ns bm_ranges_lexicographical_compare<int>/2 1.64 ns 3.04 ns bm_ranges_lexicographical_compare<int>/3 2.23 ns 2.58 ns bm_ranges_lexicographical_compare<int>/4 2.81 ns 2.81 ns bm_ranges_lexicographical_compare<int>/5 3.35 ns 3.05 ns bm_ranges_lexicographical_compare<int>/6 3.94 ns 4.60 ns bm_ranges_lexicographical_compare<int>/7 4.60 ns 4.81 ns bm_ranges_lexicographical_compare<int>/8 5.19 ns 2.35 ns bm_ranges_lexicographical_compare<int>/16 9.85 ns 2.87 ns bm_ranges_lexicographical_compare<int>/64 38.9 ns 4.70 ns bm_ranges_lexicographical_compare<int>/512 318 ns 24.5 ns bm_ranges_lexicographical_compare<int>/4096 2494 ns 202 ns bm_ranges_lexicographical_compare<int>/32768 20000 ns 1939 ns bm_ranges_lexicographical_compare<int>/262144 160433 ns 19730 ns bm_ranges_lexicographical_compare<int>/1048576 642636 ns 80760 ns ```	2024-08-04 10:02:43 +02:00
Louis Dionne	451bba6fbf	[libc++] Revert "Check correctly ref-qualified __is_callable in algorithms (#73451)" ... This reverts commit 8d151f804f, which broke some build bots. I think that is caused by an invalid argument order when checking __is_comparable in upper_bound.	2024-08-01 15:56:06 -04:00
Nhat Nguyen	8d151f804f	[libc++] Check correctly ref-qualified __is_callable in algorithms (#73451) ... We were only checking that the comparator was rvalue callable, when in reality the algorithms always call comparators as lvalues. This patch also refactors the tests for callable requirements and expands it to a few missing algorithms. Fixes #69554	2024-08-01 14:08:21 -04:00
David Spickett	f90e51a508	[libcxx][test] Mark sort.pass.cpp as a long test (#100720) ... Picolib testing skips any test requiring this feature, I just didn't know the feature existed until now.	2024-07-31 15:35:45 +01:00
nicole mazzuca	c6b192ac2e	[libc++][test] Do not assume array::iterator is a pointer (#100603) ... In the tests I added for `ranges::find_last{_if{_not}}`, I accidentally introduced an assumption that `same_as<array<T, 0>::iterator, T*>`; this is a faulty assumption on MSVC-STL. Fixes #100498.	2024-07-30 02:28:56 -07:00
David Spickett	929b474991	[libcxx][test] Explain picolib unsupported in sort.pass.cpp ... This is not a hidden bug, it's just a very slow test under emulation.	2024-07-24 12:43:07 +00:00
nicole mazzuca	04760bfadb	[libc++][ranges] P1223R5: find_last (#99312) ... Implements [P1223R5][] completely. Includes an implementation of `find_last`, `find_last_if`, and `find_last_if_not`. [P1223R5]: https://wg21.link/p1223r5	2024-07-19 09:42:16 -07:00
Iuri Chaer	a0662176a9	[libc++] Speed up set_intersection() by fast-forwarding over ranges of non-matching elements with one-sided binary search. (#75230) ... One-sided binary search, aka meta binary search, has been in the public domain for decades, and has the general advantage of being constant time in the best case, with the downside of executing at most 2*log(N) comparisons vs classic binary search's exact log(N). There are two scenarios in which it really shines: the first one is when operating over non-random-access iterators, because the classic algorithm requires knowing the container's size upfront, which adds N iterator increments to the complexity. The second one is when traversing the container in order, trying to fast-forward to the next value: in that case the classic algorithm requires at least O(N*log(N)) comparisons and, for non-random-access iterators, O(N^2) iterator increments, whereas the one-sided version will yield O(N) operations on both counts, with a best-case of O(log(N)) comparisons which is very common in practice.	2024-07-18 16:11:24 -04:00
Nikolas Klauser	dfddc0c484	[libc++] Include the rest of the detail headers by version in the umbrella headers (#96032) ... This is a follow-up to #83740.	2024-07-18 10:59:58 +02:00
Louis Dionne	7918e624ad	[libc++] Test suite portability improvements (#98527) ... This patch contains a number of small portability improvements for the test suite, making it easier to run the test suite with other standard library implementations. - Guard checks for _LIBCPP_HARDENING_MODE to avoid -Wundef - Avoid defining _LIBCPP_HARDENING_MODE even when no hardening mode is specified -- we should use the default mode of the library in that case. - Add missing includes and qualify a few function calls. - Avoid opening namespace std to forward declare stdlib containers. The test suite should represent user code, and user code isn't allowed to do that.	2024-07-12 10:17:00 -04:00
Nikolas Klauser	9e9404387d	[libc++] Remove annotations for GCC 13 and update the documentation (#97744) ... GCC 14 has been released a while ago. We've updated the CI to use GCC 14 now. This removes any old annotations in the tests and updates the documentation to reflect the updated version requirements.	2024-07-06 16:52:45 +02:00
Stephan T. Lavavej	a0cdd32b79	[libc++] [test] Consistently use REQUIRES: has-unix-headers (#94122) ... There were 7 occurrences of `UNSUPPORTED: !has-unix-headers`, versus 212 occurrences of `REQUIRES: has-unix-headers`. I don't completely understand how libc++ uses UNSUPPORTED versus REQUIRES, but it seems better to be consistent, and to avoid the double negation in "this is unsupported if we don't have unix headers". (This came to my attention because of the single occurrence in `libcxx/test/std`. Our MSVC-internal test harness isn't aware of lit features, so we teach it to skip tests via the incredibly primitive method of searching for specific comments, so I had to deal with this comment inconsistency.)	2024-06-05 10:25:26 -04:00
Jake Egan	037a0528bb	[libc++] Handle 0 size case for testing support operator new (#93834) ... The return of malloc is implementation defined when the requested size is 0. On platforms (such as AIX) that return a null pointer for 0 size, operator new will throw a bad_alloc exception. operator new should return a non null pointer for 0 size instead.	2024-06-03 16:23:08 -04:00
Stephan T. Lavavej	2ba0838615	[libc++] [test] Fix portability issues for MSVC (#93259) ... * Guard `std::__make_from_tuple_impl` tests with `#ifdef _LIBCPP_VERSION` and `LIBCPP_STATIC_ASSERT`. * Change `_LIBCPP_CONSTEXPR_SINCE_CXX20` to `TEST_CONSTEXPR_CXX20`. + Other functions in `variant.swap/swap.pass.cpp` were already using the proper test macro. * Mark `what` as `[[maybe_unused]]` when used by `TEST_LIBCPP_REQUIRE`. + This updates one occurrence in `libcxx/test/libcxx` for consistency. * Windows `_putenv_s()` takes 2 arguments, not 3. + See MSVC documentation: https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/putenv-s-wputenv-s?view=msvc-170 + POSIX `setenv()` takes `int overwrite`, but Windows `_putenv_s()` always overwrites. * Avoid non-Standard zero-length arrays. + Followup to #74183 and #79792. * Add `operator++()` to `unsized_it`. + The Standard requires this due to [N4981][] [move.iter.requirements]/1 "The template parameter `Iterator` shall either meet the *Cpp17InputIterator* requirements ([input.iterators]) or model `input_iterator` ([iterator.concept.input])." + MSVC's STL requires this because it has a strengthened exception specification in `move_iterator` that inspects the underlying iterator's increment operator. * `uniform_int_distribution` forbids `int8_t`/`uint8_t`. + See [N4981][] [rand.req.genl]/1.5. MSVC's STL enforces this. + Note that when changing the distribution's `IntType`, we need to be careful to preserve the original value range of `[0, max_input]`. * fstreams are constructible from `const fs::path::value_type*` on wide systems. + See [ifstream.cons], [ofstream.cons], [fstream.cons]. * In `msvc_stdlib_force_include.h`, map `_HAS_CXX23` to `TEST_STD_VER` 23 instead of 99. + On 2023-05-23, 71400505ca started recognizing 23 as a distinct value. * Fix test name typo: `destory_elements.pass.cpp` => `destroy_elements.pass.cpp` [N4981]: https://wg21.link/N4981	2024-05-28 12:20:58 -07:00
Louis Dionne	bd3f5a4bd3	[libc++][pstl] Improve exception handling (#88998) ... There were various places where we incorrectly handled exceptions in the PSTL. Typical issues were missing `noexcept` and taking iterators by value instead of by reference. This patch fixes those inconsistent and incorrect instances, and adds proper tests for all of those. Note that the previous tests were often incorrectly turned into no-ops by the compiler due to copy ellision, which doesn't happen with these new tests.	2024-05-22 12:39:21 -07:00
Nikolas Klauser	05cc2d5fe1	[libc++] Vectorize std::mismatch with trivially equality comparable types (#87716)	2024-05-11 23:32:48 +02:00
Christopher Di Bella	f0ea888e01	[libcxx] applies changes regarding post-commit feedback to #75259 (#76534) ... Some of the feedback was also relevant to other files, and has been applied there too.	2024-04-11 10:34:54 -07:00
A. Jiang	04dbf7ad44	[libc++][ranges] Avoid using distance in ranges::contains_subrange (#87155) ... Both `std::distance` or `ranges::distance` are inefficient for non-sized ranges. Also, calculating the range using `int` type is seriously problematic. This patch avoids using `distance` and calculation of the length of non-sized ranges. Fixes #86833.	2024-04-02 17:21:15 -07:00
Nikolas Klauser	985c1a44f8	[libc++] Optimize the two range overload of mismatch (#86853) ... ``` ----------------------------------------------------------------------------- Benchmark old new ----------------------------------------------------------------------------- bm_mismatch_two_range_overload<char>/1 0.941 ns 1.88 ns bm_mismatch_two_range_overload<char>/2 1.43 ns 2.15 ns bm_mismatch_two_range_overload<char>/3 1.95 ns 2.55 ns bm_mismatch_two_range_overload<char>/4 2.58 ns 2.90 ns bm_mismatch_two_range_overload<char>/5 3.75 ns 3.31 ns bm_mismatch_two_range_overload<char>/6 5.00 ns 3.83 ns bm_mismatch_two_range_overload<char>/7 5.59 ns 4.35 ns bm_mismatch_two_range_overload<char>/8 6.37 ns 4.84 ns bm_mismatch_two_range_overload<char>/16 11.8 ns 6.72 ns bm_mismatch_two_range_overload<char>/64 45.5 ns 2.59 ns bm_mismatch_two_range_overload<char>/512 366 ns 12.6 ns bm_mismatch_two_range_overload<char>/4096 2890 ns 91.6 ns bm_mismatch_two_range_overload<char>/32768 23038 ns 758 ns bm_mismatch_two_range_overload<char>/262144 142813 ns 6573 ns bm_mismatch_two_range_overload<char>/1048576 366679 ns 26710 ns bm_mismatch_two_range_overload<short>/1 0.934 ns 1.88 ns bm_mismatch_two_range_overload<short>/2 1.30 ns 2.58 ns bm_mismatch_two_range_overload<short>/3 1.76 ns 3.28 ns bm_mismatch_two_range_overload<short>/4 2.24 ns 3.98 ns bm_mismatch_two_range_overload<short>/5 2.80 ns 4.92 ns bm_mismatch_two_range_overload<short>/6 3.58 ns 6.01 ns bm_mismatch_two_range_overload<short>/7 4.29 ns 7.03 ns bm_mismatch_two_range_overload<short>/8 4.67 ns 7.39 ns bm_mismatch_two_range_overload<short>/16 9.86 ns 13.1 ns bm_mismatch_two_range_overload<short>/64 38.9 ns 4.55 ns bm_mismatch_two_range_overload<short>/512 348 ns 27.7 ns bm_mismatch_two_range_overload<short>/4096 2881 ns 225 ns bm_mismatch_two_range_overload<short>/32768 23111 ns 1715 ns bm_mismatch_two_range_overload<short>/262144 184846 ns 14416 ns bm_mismatch_two_range_overload<short>/1048576 742885 ns 57264 ns bm_mismatch_two_range_overload<int>/1 0.838 ns 1.19 ns bm_mismatch_two_range_overload<int>/2 1.19 ns 1.65 ns bm_mismatch_two_range_overload<int>/3 1.83 ns 2.06 ns bm_mismatch_two_range_overload<int>/4 2.38 ns 2.42 ns bm_mismatch_two_range_overload<int>/5 3.60 ns 2.47 ns bm_mismatch_two_range_overload<int>/6 3.68 ns 3.05 ns bm_mismatch_two_range_overload<int>/7 4.32 ns 3.36 ns bm_mismatch_two_range_overload<int>/8 5.18 ns 3.58 ns bm_mismatch_two_range_overload<int>/16 10.6 ns 2.84 ns bm_mismatch_two_range_overload<int>/64 39.0 ns 7.78 ns bm_mismatch_two_range_overload<int>/512 247 ns 53.9 ns bm_mismatch_two_range_overload<int>/4096 1927 ns 429 ns bm_mismatch_two_range_overload<int>/32768 15569 ns 3393 ns bm_mismatch_two_range_overload<int>/262144 125413 ns 28504 ns bm_mismatch_two_range_overload<int>/1048576 504549 ns 112729 ns ```	2024-04-01 18:21:51 +02:00
Nikolas Klauser	beaff78528	[libc++] Optimize the std::mismatch tail (#83440) ... This adds vectorization to the last 0-3 vectors and, if the range is large enough, the remaining elements that don't fill a vector completely. ``` ----------------------------------------------------------------------- Benchmark old full vectors partial vector ----------------------------------------------------------------------- bm_mismatch<char>/1 1.40 ns 1.62 ns 2.09 ns bm_mismatch<char>/2 1.88 ns 2.10 ns 2.33 ns bm_mismatch<char>/3 2.67 ns 2.56 ns 2.72 ns bm_mismatch<char>/4 3.01 ns 3.20 ns 3.70 ns bm_mismatch<char>/5 3.51 ns 3.73 ns 3.64 ns bm_mismatch<char>/6 4.71 ns 4.85 ns 4.37 ns bm_mismatch<char>/7 5.12 ns 5.33 ns 4.37 ns bm_mismatch<char>/8 5.79 ns 6.02 ns 4.75 ns bm_mismatch<char>/15 9.20 ns 10.5 ns 7.23 ns bm_mismatch<char>/16 10.2 ns 10.1 ns 7.46 ns bm_mismatch<char>/17 10.2 ns 10.8 ns 7.57 ns bm_mismatch<char>/31 17.6 ns 17.1 ns 10.8 ns bm_mismatch<char>/32 17.4 ns 1.64 ns 1.64 ns bm_mismatch<char>/33 23.3 ns 2.10 ns 2.33 ns bm_mismatch<char>/63 31.8 ns 16.9 ns 2.33 ns bm_mismatch<char>/64 32.6 ns 2.10 ns 2.10 ns bm_mismatch<char>/65 33.6 ns 2.57 ns 2.80 ns bm_mismatch<char>/127 67.3 ns 18.1 ns 3.27 ns bm_mismatch<char>/128 2.17 ns 2.14 ns 2.57 ns bm_mismatch<char>/129 2.36 ns 2.80 ns 3.27 ns bm_mismatch<char>/255 67.5 ns 19.6 ns 4.68 ns bm_mismatch<char>/256 3.76 ns 3.71 ns 3.97 ns bm_mismatch<char>/257 3.77 ns 4.04 ns 4.43 ns bm_mismatch<char>/511 70.8 ns 22.1 ns 7.47 ns bm_mismatch<char>/512 7.27 ns 7.30 ns 6.95 ns bm_mismatch<char>/513 7.11 ns 7.05 ns 6.96 ns bm_mismatch<char>/1023 75.9 ns 27.4 ns 13.3 ns bm_mismatch<char>/1024 13.9 ns 13.8 ns 12.4 ns bm_mismatch<char>/1025 13.6 ns 13.6 ns 12.8 ns bm_mismatch<char>/2047 87.3 ns 37.5 ns 25.4 ns bm_mismatch<char>/2048 26.8 ns 27.4 ns 24.0 ns bm_mismatch<char>/2049 26.7 ns 27.3 ns 25.5 ns bm_mismatch<char>/4095 112 ns 64.7 ns 48.7 ns bm_mismatch<char>/4096 53.0 ns 54.2 ns 46.8 ns bm_mismatch<char>/4097 52.7 ns 54.2 ns 48.4 ns bm_mismatch<char>/8191 160 ns 118 ns 98.4 ns bm_mismatch<char>/8192 107 ns 108 ns 96.0 ns bm_mismatch<char>/8193 106 ns 108 ns 97.2 ns bm_mismatch<char>/16383 283 ns 234 ns 215 ns bm_mismatch<char>/16384 227 ns 223 ns 217 ns bm_mismatch<char>/16385 221 ns 221 ns 215 ns bm_mismatch<char>/32767 547 ns 499 ns 488 ns bm_mismatch<char>/32768 495 ns 492 ns 492 ns bm_mismatch<char>/32769 491 ns 489 ns 488 ns bm_mismatch<char>/65535 1028 ns 979 ns 971 ns bm_mismatch<char>/65536 976 ns 970 ns 974 ns bm_mismatch<char>/65537 970 ns 965 ns 971 ns bm_mismatch<char>/131071 2031 ns 1948 ns 2005 ns bm_mismatch<char>/131072 1973 ns 1955 ns 1974 ns bm_mismatch<char>/131073 1989 ns 1932 ns 2001 ns bm_mismatch<char>/262143 4469 ns 4244 ns 4223 ns bm_mismatch<char>/262144 4443 ns 4183 ns 4243 ns bm_mismatch<char>/262145 4400 ns 4232 ns 4246 ns bm_mismatch<char>/524287 10169 ns 9733 ns 9592 ns bm_mismatch<char>/524288 10154 ns 9664 ns 9843 ns bm_mismatch<char>/524289 10113 ns 9641 ns 10003 ns bm_mismatch<short>/1 1.86 ns 2.53 ns 2.32 ns bm_mismatch<short>/2 2.57 ns 2.77 ns 2.55 ns bm_mismatch<short>/3 3.26 ns 3.00 ns 2.79 ns bm_mismatch<short>/4 3.95 ns 3.39 ns 3.15 ns bm_mismatch<short>/5 4.83 ns 3.97 ns 3.72 ns bm_mismatch<short>/6 5.43 ns 4.34 ns 4.03 ns bm_mismatch<short>/7 6.11 ns 4.73 ns 4.44 ns bm_mismatch<short>/8 6.84 ns 5.02 ns 4.79 ns bm_mismatch<short>/15 11.5 ns 7.12 ns 6.50 ns bm_mismatch<short>/16 13.9 ns 1.87 ns 2.11 ns bm_mismatch<short>/17 14.0 ns 3.00 ns 2.47 ns bm_mismatch<short>/31 23.1 ns 7.87 ns 2.47 ns bm_mismatch<short>/32 23.8 ns 2.57 ns 2.81 ns bm_mismatch<short>/33 24.5 ns 3.70 ns 2.94 ns bm_mismatch<short>/63 44.8 ns 9.37 ns 3.46 ns bm_mismatch<short>/64 2.32 ns 2.57 ns 2.64 ns bm_mismatch<short>/65 2.52 ns 3.02 ns 3.51 ns bm_mismatch<short>/127 45.6 ns 9.97 ns 5.18 ns bm_mismatch<short>/128 3.85 ns 3.93 ns 3.94 ns bm_mismatch<short>/129 3.82 ns 4.20 ns 4.70 ns bm_mismatch<short>/255 50.4 ns 12.6 ns 8.07 ns bm_mismatch<short>/256 7.23 ns 6.91 ns 6.98 ns bm_mismatch<short>/257 7.24 ns 7.19 ns 7.55 ns bm_mismatch<short>/511 52.3 ns 17.8 ns 14.0 ns bm_mismatch<short>/512 13.6 ns 13.7 ns 13.6 ns bm_mismatch<short>/513 13.9 ns 13.8 ns 18.5 ns bm_mismatch<short>/1023 60.9 ns 30.9 ns 26.3 ns bm_mismatch<short>/1024 26.7 ns 27.7 ns 25.7 ns bm_mismatch<short>/1025 27.7 ns 27.6 ns 25.3 ns bm_mismatch<short>/2047 88.4 ns 58.0 ns 51.6 ns bm_mismatch<short>/2048 52.8 ns 55.3 ns 50.6 ns bm_mismatch<short>/2049 55.2 ns 54.8 ns 48.7 ns bm_mismatch<short>/4095 153 ns 113 ns 102 ns bm_mismatch<short>/4096 105 ns 110 ns 101 ns bm_mismatch<short>/4097 110 ns 110 ns 99.1 ns bm_mismatch<short>/8191 277 ns 219 ns 206 ns bm_mismatch<short>/8192 226 ns 214 ns 250 ns bm_mismatch<short>/8193 226 ns 207 ns 208 ns bm_mismatch<short>/16383 519 ns 492 ns 488 ns bm_mismatch<short>/16384 494 ns 492 ns 492 ns bm_mismatch<short>/16385 492 ns 488 ns 489 ns bm_mismatch<short>/32767 1007 ns 968 ns 964 ns bm_mismatch<short>/32768 977 ns 972 ns 970 ns bm_mismatch<short>/32769 972 ns 962 ns 967 ns bm_mismatch<short>/65535 1978 ns 1918 ns 1956 ns bm_mismatch<short>/65536 1940 ns 1927 ns 1970 ns bm_mismatch<short>/65537 1937 ns 1922 ns 1959 ns bm_mismatch<short>/131071 4524 ns 4193 ns 4304 ns bm_mismatch<short>/131072 4445 ns 4196 ns 4306 ns bm_mismatch<short>/131073 4452 ns 4278 ns 4311 ns bm_mismatch<short>/262143 9801 ns 10188 ns 9634 ns bm_mismatch<short>/262144 9738 ns 10151 ns 9651 ns bm_mismatch<short>/262145 9716 ns 10171 ns 9715 ns bm_mismatch<short>/524287 19944 ns 20718 ns 20044 ns bm_mismatch<short>/524288 21139 ns 20647 ns 20008 ns bm_mismatch<short>/524289 21162 ns 19512 ns 20068 ns bm_mismatch<int>/1 1.40 ns 1.84 ns 1.87 ns bm_mismatch<int>/2 1.87 ns 2.08 ns 2.09 ns bm_mismatch<int>/3 2.36 ns 2.31 ns 2.87 ns bm_mismatch<int>/4 3.06 ns 2.72 ns 2.95 ns bm_mismatch<int>/5 3.66 ns 3.37 ns 3.42 ns bm_mismatch<int>/6 4.55 ns 3.65 ns 3.73 ns bm_mismatch<int>/7 5.03 ns 3.93 ns 3.94 ns bm_mismatch<int>/8 5.67 ns 1.86 ns 1.87 ns bm_mismatch<int>/15 9.89 ns 4.41 ns 2.34 ns bm_mismatch<int>/16 10.1 ns 2.33 ns 2.34 ns bm_mismatch<int>/17 10.2 ns 3.34 ns 2.86 ns bm_mismatch<int>/31 17.2 ns 5.54 ns 3.28 ns bm_mismatch<int>/32 2.16 ns 2.15 ns 2.58 ns bm_mismatch<int>/33 2.36 ns 3.01 ns 3.28 ns bm_mismatch<int>/63 17.7 ns 6.50 ns 4.93 ns bm_mismatch<int>/64 3.81 ns 3.58 ns 3.90 ns bm_mismatch<int>/65 3.74 ns 4.36 ns 4.45 ns bm_mismatch<int>/127 19.5 ns 9.56 ns 7.74 ns bm_mismatch<int>/128 7.30 ns 6.41 ns 6.85 ns bm_mismatch<int>/129 7.09 ns 7.04 ns 7.06 ns bm_mismatch<int>/255 24.7 ns 14.8 ns 13.3 ns bm_mismatch<int>/256 14.0 ns 12.1 ns 12.3 ns bm_mismatch<int>/257 13.8 ns 12.7 ns 12.8 ns bm_mismatch<int>/511 34.3 ns 26.3 ns 24.8 ns bm_mismatch<int>/512 27.6 ns 23.6 ns 23.9 ns bm_mismatch<int>/513 27.3 ns 24.4 ns 25.1 ns bm_mismatch<int>/1023 62.5 ns 50.9 ns 48.3 ns bm_mismatch<int>/1024 54.4 ns 46.1 ns 46.6 ns bm_mismatch<int>/1025 54.2 ns 48.4 ns 47.5 ns bm_mismatch<int>/2047 116 ns 97.8 ns 94.1 ns bm_mismatch<int>/2048 108 ns 92.6 ns 92.4 ns bm_mismatch<int>/2049 108 ns 104 ns 94.0 ns bm_mismatch<int>/4095 233 ns 222 ns 205 ns bm_mismatch<int>/4096 226 ns 223 ns 225 ns bm_mismatch<int>/4097 221 ns 219 ns 210 ns bm_mismatch<int>/8191 499 ns 485 ns 488 ns bm_mismatch<int>/8192 496 ns 490 ns 495 ns bm_mismatch<int>/8193 491 ns 485 ns 488 ns bm_mismatch<int>/16383 982 ns 962 ns 964 ns bm_mismatch<int>/16384 974 ns 971 ns 971 ns bm_mismatch<int>/16385 971 ns 961 ns 968 ns bm_mismatch<int>/32767 2003 ns 1959 ns 1920 ns bm_mismatch<int>/32768 1996 ns 1947 ns 1928 ns bm_mismatch<int>/32769 1990 ns 1945 ns 1926 ns bm_mismatch<int>/65535 4434 ns 4275 ns 4312 ns bm_mismatch<int>/65536 4437 ns 4267 ns 4321 ns bm_mismatch<int>/65537 4442 ns 4261 ns 4321 ns bm_mismatch<int>/131071 9673 ns 9648 ns 9465 ns bm_mismatch<int>/131072 9667 ns 9671 ns 9465 ns bm_mismatch<int>/131073 9661 ns 9653 ns 9464 ns bm_mismatch<int>/262143 20595 ns 19605 ns 19064 ns bm_mismatch<int>/262144 19894 ns 19572 ns 19009 ns bm_mismatch<int>/262145 19851 ns 19656 ns 18999 ns bm_mismatch<int>/524287 39556 ns 39364 ns 38131 ns bm_mismatch<int>/524288 39678 ns 39573 ns 38183 ns bm_mismatch<int>/524289 40168 ns 39301 ns 38121 ns ```	2024-03-29 19:29:54 +01:00
Nikolas Klauser	b68e2eba0b	[libc++] Vectorize mismatch (#73255) ... ``` --------------------------------------------------- Benchmark old new --------------------------------------------------- bm_mismatch<char>/1 0.835 ns 2.37 ns bm_mismatch<char>/2 1.44 ns 2.60 ns bm_mismatch<char>/3 2.06 ns 2.83 ns bm_mismatch<char>/4 2.60 ns 3.29 ns bm_mismatch<char>/5 3.15 ns 3.77 ns bm_mismatch<char>/6 3.82 ns 4.17 ns bm_mismatch<char>/7 4.29 ns 4.52 ns bm_mismatch<char>/8 4.78 ns 4.86 ns bm_mismatch<char>/16 9.06 ns 7.54 ns bm_mismatch<char>/64 31.7 ns 19.1 ns bm_mismatch<char>/512 249 ns 8.16 ns bm_mismatch<char>/4096 1956 ns 44.2 ns bm_mismatch<char>/32768 15498 ns 501 ns bm_mismatch<char>/262144 123965 ns 4479 ns bm_mismatch<char>/1048576 495668 ns 21306 ns bm_mismatch<short>/1 0.710 ns 2.12 ns bm_mismatch<short>/2 1.03 ns 2.66 ns bm_mismatch<short>/3 1.29 ns 3.56 ns bm_mismatch<short>/4 1.68 ns 4.29 ns bm_mismatch<short>/5 1.96 ns 5.18 ns bm_mismatch<short>/6 2.59 ns 5.91 ns bm_mismatch<short>/7 2.86 ns 6.63 ns bm_mismatch<short>/8 3.19 ns 7.33 ns bm_mismatch<short>/16 5.48 ns 13.0 ns bm_mismatch<short>/64 16.6 ns 4.06 ns bm_mismatch<short>/512 130 ns 13.8 ns bm_mismatch<short>/4096 985 ns 93.8 ns bm_mismatch<short>/32768 7846 ns 1002 ns bm_mismatch<short>/262144 63217 ns 10637 ns bm_mismatch<short>/1048576 251782 ns 42471 ns bm_mismatch<int>/1 0.716 ns 1.91 ns bm_mismatch<int>/2 1.21 ns 2.49 ns bm_mismatch<int>/3 1.38 ns 3.46 ns bm_mismatch<int>/4 1.71 ns 4.04 ns bm_mismatch<int>/5 2.00 ns 4.98 ns bm_mismatch<int>/6 2.43 ns 5.67 ns bm_mismatch<int>/7 3.05 ns 6.38 ns bm_mismatch<int>/8 3.22 ns 7.09 ns bm_mismatch<int>/16 5.18 ns 12.8 ns bm_mismatch<int>/64 16.6 ns 5.28 ns bm_mismatch<int>/512 129 ns 25.2 ns bm_mismatch<int>/4096 1009 ns 201 ns bm_mismatch<int>/32768 7776 ns 2144 ns bm_mismatch<int>/262144 62371 ns 20551 ns bm_mismatch<int>/1048576 254750 ns 90097 ns ```	2024-03-23 15:28:22 +01:00
Nikolas Klauser	07b18c5e1b	[libc++] Optimize ranges::fill{,_n} for vector<bool>::iterator (#84642) ... ``` ------------------------------------------------------ Benchmark old new ------------------------------------------------------ bm_ranges_fill_n/1 1.64 ns 3.06 ns bm_ranges_fill_n/2 3.45 ns 3.06 ns bm_ranges_fill_n/3 4.88 ns 3.06 ns bm_ranges_fill_n/4 6.46 ns 3.06 ns bm_ranges_fill_n/5 8.03 ns 3.06 ns bm_ranges_fill_n/6 9.65 ns 3.07 ns bm_ranges_fill_n/7 11.5 ns 3.06 ns bm_ranges_fill_n/8 13.0 ns 3.06 ns bm_ranges_fill_n/16 25.9 ns 3.06 ns bm_ranges_fill_n/64 103 ns 4.62 ns bm_ranges_fill_n/512 711 ns 4.40 ns bm_ranges_fill_n/4096 5642 ns 9.86 ns bm_ranges_fill_n/32768 45135 ns 33.6 ns bm_ranges_fill_n/262144 360818 ns 243 ns bm_ranges_fill_n/1048576 1442828 ns 982 ns bm_ranges_fill/1 1.63 ns 3.17 ns bm_ranges_fill/2 3.43 ns 3.28 ns bm_ranges_fill/3 4.97 ns 3.31 ns bm_ranges_fill/4 6.53 ns 3.27 ns bm_ranges_fill/5 8.12 ns 3.33 ns bm_ranges_fill/6 9.76 ns 3.32 ns bm_ranges_fill/7 11.6 ns 3.29 ns bm_ranges_fill/8 13.2 ns 3.26 ns bm_ranges_fill/16 26.3 ns 3.26 ns bm_ranges_fill/64 104 ns 4.92 ns bm_ranges_fill/512 716 ns 4.47 ns bm_ranges_fill/4096 5772 ns 8.21 ns bm_ranges_fill/32768 45778 ns 33.1 ns bm_ranges_fill/262144 351422 ns 241 ns bm_ranges_fill/1048576 1404710 ns 965 ns ```	2024-03-17 20:00:54 +01:00
ZijunZhaoCCK	a6b846ae1e	[libc++][ranges] Implement ranges::contains_subrange (#66963)	2024-02-13 15:42:37 -08:00
Stephan T. Lavavej	ef83894810	[libc++][test] Fix zero-length arrays and copy-pasted lambdas in ranges.contains.pass.cpp (#79792) ... * Fix MSVC error C2466: cannot allocate an array of constant size 0 + MSVC rejects this non-Standard extension. Previous fixes: #74183 * Fix MSVC warning C4805: `'=='`: unsafe mix of type `'int'` and type `'const bool'` in operation + AFAICT, these lambdas were copy-pasted, and didn't intend to take and return `int` here. This part of the test is using `vector<bool>` for random-access but non-contiguous iterators, and it's checking how many times the projection is invoked, but the projection doesn't need to do anything squirrely, it should otherwise be an identity. * Fix typos: "continuous" => "contiguous".	2024-01-29 11:55:35 +01:00
Stephan T. Lavavej	c9535d7b61	[libc++][test] Silence MSVC warnings (#79791) ... * `libcxx/test/std/algorithms/alg.nonmodifying/alg.find/find.pass.cpp` emits a bunch of warnings, all caused by what appears to be intentional code: + Silence MSVC warning C4245: conversion from `'int'` to `'wchar_t'`, signed/unsigned mismatch - Caused by: `test<U>(0, -1);` + Silence MSVC warning C4305: 'argument': truncation from `'int'` to `'bool'` - Caused by: `test<U>(0, -1);` + Silence MSVC warning C4310: cast truncates constant value - Caused by: `test<U>(T(-129), U(-129));` + Silence MSVC warning C4805: `'=='`: unsafe mix of type `'char'` and type `'bool'` in operation - Caused by: `bool expect_match = val == to_find;` * `libcxx/test/std/algorithms/alg.nonmodifying/alg.fold/left_folds.pass.cpp` + Silence MSVC warning C4244: 'argument': conversion from `'double'` to `'const int'`, possible loss of data - Caused by `[](int const x, double const y) { return x + y; }` deliberately being given `double`s to truncate. * `libcxx/test/std/numerics/numeric.ops/numeric.ops.midpoint/midpoint.pointer.pass.cpp` + Silence MSVC warnings about C++20 deprecated `volatile`. - Caused by: `runtime_test< volatile T>();`	2024-01-29 11:53:05 +01:00
Michael Schellenberger Costa	ad01447d30	[libcxx] Fix typo in parallel for_each_n test (#78954) ... This fixes a trivial copy and paste error where we forgot to change `for_each` to `for_each_n`	2024-01-22 12:10:30 +01:00
Konstantin Varlamov	8dfc67d672	[libc++][hardening] Rework how the assertion handler can be overridden. (#77883) ... Previously there were two ways to override the verbose abort function which gets called when a hardening assertion is triggered: - compile-time: define the `_LIBCPP_VERBOSE_ABORT` macro; - link-time: provide a definition of `__libcpp_verbose_abort` function. This patch adds a new configure-time approach: the vendor can provide a path to a custom header file which will get copied into the build by CMake and included by the library. The header must provide a definition of the `_LIBCPP_ASSERTION_HANDLER` macro which is what will get called should a hardening assertion fail. As of this patch, overriding `_LIBCPP_VERBOSE_ABORT` will still work, but the previous mechanisms will be effectively removed in a follow-up patch, making the configure-time mechanism the sole way of overriding the default handler. Note that `_LIBCPP_ASSERTION_HANDLER` only gets invoked when a hardening assertion fails. It does not affect other cases where `_LIBCPP_VERBOSE_ABORT` is currently used (e.g. when an exception is thrown in the `-fno-exceptions` mode). The library provides a default version of the custom header file that will get used if it's not overridden by the vendor. That allows us to always test the override mechanism and reduces the difference in configuration between the pristine version of the library and a platform-specific version.	2024-01-17 18:56:07 -08:00
Nikolas Klauser	b203d5320d	[libc++] Optimize std::find if types are integral and have the same signedness (#70345) ... Fixes #70238	2023-12-23 11:21:27 +01:00
Christopher Di Bella	3903438860	[libcxx] adds ranges::fold_left_with_iter and ranges::fold_left (#75259) ... Notable things in this commit: * refactors `__indirect_binary_left_foldable`, making it slightly different (but equivalent) to _`indirect-binary-left-foldable`_, which improves readability (a [patch to the Working Paper][patch] was made) * omits `__cpo` namespace, since it is not required for implementing niebloids (a cleanup should happen in 2024) * puts tests ensuring invocable robustness and dangling correctness inside the correctness testing to ensure that the algorithms' results are still correct [patch]: https://github.com/cplusplus/draft/pull/6734	2023-12-19 21:57:50 -08:00
ZijunZhaoCCK	fdd089b500	[libc++] Implement ranges::contains (#65148) ... Differential Revision: https://reviews.llvm.org/D159232 ``` Running ./ranges_contains.libcxx.out Run on (10 X 24.121 MHz CPU s) CPU Caches: L1 Data 64 KiB (x10) L1 Instruction 128 KiB (x10) L2 Unified 4096 KiB (x5) Load Average: 3.37, 6.77, 5.27 -------------------------------------------------------------------- Benchmark Time CPU Iterations -------------------------------------------------------------------- bm_contains_char/16 1.88 ns 1.87 ns 371607095 bm_contains_char/256 7.48 ns 7.47 ns 93292285 bm_contains_char/4096 99.7 ns 99.6 ns 7013185 bm_contains_char/65536 1296 ns 1294 ns 540436 bm_contains_char/1048576 23887 ns 23860 ns 29302 bm_contains_char/16777216 389420 ns 389095 ns 1796 bm_contains_int/16 7.14 ns 7.14 ns 97776288 bm_contains_int/256 90.4 ns 90.3 ns 7558089 bm_contains_int/4096 1294 ns 1290 ns 543052 bm_contains_int/65536 20482 ns 20443 ns 34334 bm_contains_int/1048576 328817 ns 327965 ns 2147 bm_contains_int/16777216 5246279 ns 5239361 ns 133 bm_contains_bool/16 2.19 ns 2.19 ns 322565780 bm_contains_bool/256 3.42 ns 3.41 ns 205025467 bm_contains_bool/4096 22.1 ns 22.1 ns 31780479 bm_contains_bool/65536 333 ns 332 ns 2106606 bm_contains_bool/1048576 5126 ns 5119 ns 135901 bm_contains_bool/16777216 81656 ns 81574 ns 8569 ``` --------- Co-authored-by: Nathan Gauër <brioche@google.com>	2023-12-19 16:34:19 -08:00
Louis Dionne	a35629cd8d	[libc++] Remove assumptions that std::array::iterator is a raw pointer (#74624) ... This patch removes assumptions that std::array's iterators are raw pointers in the source code and in our test suite. While this is true right now, this doesn't have to be true and ion the future we might want to enable bounded iterators in std::array, which would require this change. This is a pre-requisite for landing #74482	2023-12-18 10:00:47 -05:00
Nikolas Klauser	f7407411a1	[libc++] Optimize std::find for segmented iterators (#67224) ... ``` -------------------------------------------------------------------------- Benchmark old new -------------------------------------------------------------------------- bm_find<std::deque<char>>/1 6.06 ns 10.6 ns bm_find<std::deque<char>>/2 15.5 ns 10.6 ns bm_find<std::deque<char>>/3 19.0 ns 10.6 ns bm_find<std::deque<char>>/4 20.8 ns 10.6 ns bm_find<std::deque<char>>/5 22.0 ns 10.6 ns bm_find<std::deque<char>>/6 23.0 ns 10.5 ns bm_find<std::deque<char>>/7 24.8 ns 10.7 ns bm_find<std::deque<char>>/8 25.7 ns 10.6 ns bm_find<std::deque<char>>/16 28.3 ns 10.6 ns bm_find<std::deque<char>>/64 44.2 ns 27.0 ns bm_find<std::deque<char>>/512 133 ns 37.6 ns bm_find<std::deque<char>>/4096 867 ns 53.1 ns bm_find<std::deque<char>>/32768 6838 ns 160 ns bm_find<std::deque<char>>/262144 52897 ns 1495 ns bm_find<std::deque<char>>/1048576 215621 ns 6077 ns bm_find<std::deque<short>>/1 6.03 ns 6.28 ns bm_find<std::deque<short>>/2 15.8 ns 15.8 ns bm_find<std::deque<short>>/3 20.5 ns 20.3 ns bm_find<std::deque<short>>/4 21.0 ns 21.0 ns bm_find<std::deque<short>>/5 23.0 ns 22.1 ns bm_find<std::deque<short>>/6 22.6 ns 23.0 ns bm_find<std::deque<short>>/7 23.4 ns 23.7 ns bm_find<std::deque<short>>/8 24.4 ns 24.9 ns bm_find<std::deque<short>>/16 26.6 ns 27.2 ns bm_find<std::deque<short>>/64 43.2 ns 40.9 ns bm_find<std::deque<short>>/512 124 ns 90.7 ns bm_find<std::deque<short>>/4096 845 ns 525 ns bm_find<std::deque<short>>/32768 7273 ns 3194 ns bm_find<std::deque<short>>/262144 53710 ns 24385 ns bm_find<std::deque<short>>/1048576 216086 ns 96195 ns bm_find<std::deque<int>>/1 6.03 ns 10.3 ns bm_find<std::deque<int>>/2 15.6 ns 10.3 ns bm_find<std::deque<int>>/3 19.1 ns 10.3 ns bm_find<std::deque<int>>/4 22.3 ns 10.3 ns bm_find<std::deque<int>>/5 23.5 ns 10.4 ns bm_find<std::deque<int>>/6 23.1 ns 10.3 ns bm_find<std::deque<int>>/7 23.7 ns 10.2 ns bm_find<std::deque<int>>/8 24.5 ns 10.2 ns bm_find<std::deque<int>>/16 27.9 ns 26.6 ns bm_find<std::deque<int>>/64 42.6 ns 32.2 ns bm_find<std::deque<int>>/512 123 ns 43.0 ns bm_find<std::deque<int>>/4096 874 ns 93.5 ns bm_find<std::deque<int>>/32768 7031 ns 751 ns bm_find<std::deque<int>>/262144 57723 ns 6169 ns bm_find<std::deque<int>>/1048576 230867 ns 35851 ns bm_ranges_find<std::deque<char>>/1 5.97 ns 10.6 ns bm_ranges_find<std::deque<char>>/2 16.0 ns 10.5 ns bm_ranges_find<std::deque<char>>/3 19.5 ns 10.5 ns bm_ranges_find<std::deque<char>>/4 21.1 ns 10.6 ns bm_ranges_find<std::deque<char>>/5 22.8 ns 10.5 ns bm_ranges_find<std::deque<char>>/6 22.8 ns 10.6 ns bm_ranges_find<std::deque<char>>/7 23.4 ns 10.8 ns bm_ranges_find<std::deque<char>>/8 24.1 ns 10.5 ns bm_ranges_find<std::deque<char>>/16 26.9 ns 10.6 ns bm_ranges_find<std::deque<char>>/64 50.2 ns 27.2 ns bm_ranges_find<std::deque<char>>/512 126 ns 38.3 ns bm_ranges_find<std::deque<char>>/4096 868 ns 53.8 ns bm_ranges_find<std::deque<char>>/32768 6695 ns 161 ns bm_ranges_find<std::deque<char>>/262144 54411 ns 1497 ns bm_ranges_find<std::deque<char>>/1048576 241699 ns 6042 ns bm_ranges_find<std::deque<short>>/1 6.39 ns 6.31 ns bm_ranges_find<std::deque<short>>/2 15.8 ns 15.9 ns bm_ranges_find<std::deque<short>>/3 19.0 ns 19.8 ns bm_ranges_find<std::deque<short>>/4 20.8 ns 20.9 ns bm_ranges_find<std::deque<short>>/5 21.8 ns 22.1 ns bm_ranges_find<std::deque<short>>/6 23.0 ns 23.0 ns bm_ranges_find<std::deque<short>>/7 23.2 ns 23.9 ns bm_ranges_find<std::deque<short>>/8 23.7 ns 24.4 ns bm_ranges_find<std::deque<short>>/16 26.6 ns 26.8 ns bm_ranges_find<std::deque<short>>/64 43.4 ns 39.7 ns bm_ranges_find<std::deque<short>>/512 131 ns 90.5 ns bm_ranges_find<std::deque<short>>/4096 851 ns 523 ns bm_ranges_find<std::deque<short>>/32768 7370 ns 3166 ns bm_ranges_find<std::deque<short>>/262144 60778 ns 24814 ns bm_ranges_find<std::deque<short>>/1048576 229288 ns 99273 ns bm_ranges_find<std::deque<int>>/1 6.43 ns 10.2 ns bm_ranges_find<std::deque<int>>/2 16.6 ns 10.2 ns bm_ranges_find<std::deque<int>>/3 19.6 ns 10.2 ns bm_ranges_find<std::deque<int>>/4 21.0 ns 10.2 ns bm_ranges_find<std::deque<int>>/5 21.9 ns 10.4 ns bm_ranges_find<std::deque<int>>/6 22.7 ns 10.2 ns bm_ranges_find<std::deque<int>>/7 23.9 ns 10.2 ns bm_ranges_find<std::deque<int>>/8 23.8 ns 10.2 ns bm_ranges_find<std::deque<int>>/16 27.2 ns 27.1 ns bm_ranges_find<std::deque<int>>/64 42.4 ns 32.4 ns bm_ranges_find<std::deque<int>>/512 122 ns 43.0 ns bm_ranges_find<std::deque<int>>/4096 895 ns 93.7 ns bm_ranges_find<std::deque<int>>/32768 6890 ns 756 ns bm_ranges_find<std::deque<int>>/262144 54025 ns 6102 ns bm_ranges_find<std::deque<int>>/1048576 221558 ns 32783 ns ```	2023-12-15 17:10:16 +01:00
Stephan T. Lavavej	64addd6521	[libc++][test] Enhance ADDITIONAL_COMPILE_FLAGS, use TEST_MEOW_DIAGNOSTIC_IGNORED sparingly (#75317) ... This is the last PR that's needed (for now) to get libc++'s tests working with MSVC's STL. The ADDITIONAL_COMPILE_FLAGS machinery is very useful, but also very problematic for MSVC, as it doesn't understand most of Clang's compiler options. We've been dealing with this by simply marking anything that uses ADDITIONAL_COMPILE_FLAGS as FAIL or SKIPPED, but that creates significant gaps in test coverage. Fortunately, ADDITIONAL_COMPILE_FLAGS also supports "features", which can be slightly enhanced to send Clang-compatible and MSVC-compatible options to the right compilers. This patch adds the gcc-style-warnings and cl-style-warnings Lit features, and uses that to pass the appropriate warning flags to tests. It also uses TEST_MEOW_DIAGNOSTIC_IGNORED for a few local suppressions of MSVC warnings.	2023-12-14 17:38:27 -05:00
Jakub Mazurkiewicz	6a66467499	[libc++] P2770R0: Stashing stashing iterators for proper flattening (#66033) ... - Partially implements P2770R0 (http://wg21.link/p2770) - Fixes https://wg21.link/LWG3698, https://wg21.link/LWG3700, and https://wg21.link/LWG3791 - join_with_view hasn't been done yet since this type isn't implemented yet - Rename tuple test directory to match the standard (which changed in P2770R0) - Rename join_view test directory to match the standard	2023-12-12 09:45:14 -05:00
Stephan T. Lavavej	b2cc4b994e	[libc++][test] Fix more MSVC and Clang warnings (#74965) ... Found while running libc++'s tests with MSVC's STL. * `libcxx/test/std/algorithms/alg.sorting/alg.heap.operations/sort.heap/ranges_sort_heap.pass.cpp` + Fix Clang `-Wunused-variable`, because `LIBCPP_ASSERT` expands to nothing for MSVC's STL. + This is the same "always void-cast" change that #73437 applied to the neighboring `complexity.pass.cpp`. I missed that `ranges_sort_heap.pass.cpp` was also affected because we had disabled this test. * `libcxx/test/std/input.output/file.streams/fstreams/ifstream.members/buffered_reads.pass.cpp` * `libcxx/test/std/input.output/file.streams/fstreams/ofstream.members/buffered_writes.pass.cpp` + Fix MSVC "warning C4244: '`=`': conversion from '`__int64`' to '`_Ty`', possible loss of data". + This is a valid warning, possibly the best one that MSVC found in this entire saga. We're accumulating a `std::vector<std::streamsize>` and storing the result in `std::streamsize total_size` but we actually have to start with `std::streamsize{0}` or we'll truncate. * `libcxx/test/std/input.output/filesystems/fs.enum/enum.path.format.pass.cpp` + Fix Clang `-Wunused-local-typedef` because the following usage is libc++-only. + I'm just expanding it at the point of use, and using the dedicated `LIBCPP_STATIC_ASSERT` to keep the line length down. * `libcxx/test/std/input.output/syncstream/syncbuf/syncstream.syncbuf.assign/swap.pass.cpp` + Fix MSVC "warning C4242: 'argument': conversion from '`int`' to '`const _Elem`', possible loss of data". + This is a valid warning (possibly the second-best) as `sputc()` returns `int_type`. If `sputc()` returns something unexpected, we want to know, so we should separately say `expected.push_back(CharT('B'))`. * `libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.single/new.size_align_nothrow.pass.cpp` * `libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.single/new.size_nothrow.pass.cpp` + Fix MSVC "warning C6001: Using uninitialized memory '`x`'." + [N4964](https://wg21.link/N4964) \[new.delete.single\]/12: > *Effects:* The deallocation functions (\[basic.stc.dynamic.deallocation\]) called by a *delete-expression* (\[expr.delete\]) to render the value of `ptr` invalid. + \[basic.stc.general\]/4: > When the end of the duration of a region of storage is reached, the values of all pointers representing the address of any part of that region of storage become invalid pointer values (\[basic.compound\]). Indirection through an invalid pointer value and passing an invalid pointer value to a deallocation function have undefined behavior. Any other use of an invalid pointer value has implementation-defined behavior. + In certain configurations, after `delete x;` MSVC will consider `x` to be radioactive (and in other configurations, it'll physically null out `x` as a safety measure). We can copy it into `old_x` before deletion, which the implementation finds acceptable. * `libcxx/test/std/ranges/range.adaptors/range.elements/general.pass.cpp` * `libcxx/test/std/ranges/range.adaptors/range.elements/iterator/deref.pass.cpp` + Fix MSVC "warning C4242: 'initializing': conversion from '`_Ty`' to '`_Ty`', possible loss of data". + This was being emitted in `pair` and `tuple`'s perfect forwarding constructors. Passing `short{1}` allows MSVC to see that no truncation is happening. * `libcxx/test/std/ranges/range.adaptors/range.elements/iterator/member_types.compile.pass.cpp` + Fix MSVC "warning C4242: 'initializing': conversion from '`_Ty`' to '`_Ty2`', possible loss of data". + Similarly, this was being emitted in `pair`'s perfect forwarding constructor. After passing `short{1}`, I reduced repetition by relying on CTAD. (I can undo that cleanup if it's stylistically undesirable.) * `libcxx/test/std/utilities/function.objects/refwrap/refwrap.const/type_conv_ctor.pass.cpp` + Fix MSVC "warning C4930: '`std::reference_wrapper<int> purr(void)`': prototyped function not called (was a variable definition intended?)". + There's no reason for `purr()` to be locally declared (aside from isolating it to a narrow scope, which has minimal benefits); it can be declared like `meow()` above. 😸 * `libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.create/make_shared_for_overwrite.pass.cpp` * `libcxx/test/std/utilities/smartptr/unique.ptr/unique.ptr.create/make_unique_for_overwrite.default_init.pass.cpp` + Fix MSVC static analysis warnings when replacing `operator new`: ``` warning C28196: The requirement that '(_Param_(1)>0)?(return!=0):(1)' is not satisfied. (The expression does not evaluate to true.) warning C6387: 'return' could be '0': this does not adhere to the specification for the function 'new'. warning C6011: Dereferencing NULL pointer 'reinterpret_cast<char *>ptr+i'. ``` + All we need is a null check, which appears in other `operator new` replacements: b85f1f9b18/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.single/new.size.replace.pass.cpp (L27-L28)	2023-12-10 13:46:40 -08:00
Stephan T. Lavavej	774295ca1d	[libc++][test] Fix MSVC warnings with static_casts (#74962) ... Found while running libc++'s tests with MSVC's STL. * `libcxx/test/std/algorithms/alg.modifying.operations/alg.unique/ranges_unique_copy.pass.cpp` + Fix MSVC "warning C4389: '`==`': signed/unsigned mismatch". + This was x86-specific for me. The LHS is `int` and the RHS is `size_t`. We know the `array`'s size, so `static_cast<int>` is certainly safe, and this matches the following `numberOfProj` comparisons. * `libcxx/test/std/containers/sequences/insert_range_sequence_containers.h` + Fix MSVC "warning C4267: 'argument': conversion from '`size_t`' to '`const int`', possible loss of data". + `test_case.index` is `size_t`: b85f1f9b18/libcxx/test/std/containers/insert_range_helpers.h (L65-L68) + But the container's `difference_type` is `int`: b85f1f9b18/libcxx/test/support/test_allocator.h (L65-L76) + I introduced an alias `D` to make the long line more readable. * `libcxx/test/std/containers/unord/unord.map/eq.different_hash.pass.cpp` * `libcxx/test/std/containers/unord/unord.multimap/eq.different_hash.pass.cpp` * `libcxx/test/std/containers/unord/unord.multiset/eq.different_hash.pass.cpp` * `libcxx/test/std/containers/unord/unord.set/eq.different_hash.pass.cpp` + Fix MSVC "warning C6297: Arithmetic overflow. Results might not be an expected value." + This warning is almost annoying enough to outright disable, but we use similar `static_cast`s to deal with sign/truncation warnings elsewhere, because there's some value in ensuring that product code is clean with respect to these warnings. If there were many more occurrences, then disabling the warning would be appropriate. + Cleanup: Change 2 inconsistently unqualified occurrences of `size_t` to `std::size_t`. * `libcxx/test/std/containers/views/mdspan/layout_stride/index_operator.pass.cpp` + Fix MSVC "warning C4244: 'initializing': conversion from '`__int64`' to '`size_t`', possible loss of data". + This was x86-specific for me. The `args` are indeed `int64_t`, and we're storing the result in `size_t`, so we should cast. * `libcxx/test/std/ranges/range.utility/range.utility.conv/container.h` + Fix MSVC "warning C4244: 'initializing': conversion from '`ptrdiff_t`' to '`int`', possible loss of data". + Fix MSVC "warning C4267: 'initializing': conversion from '`size_t`' to '`int`', possible loss of data". + We're initializing `int size_`, so we should explicitly cast from pointer subtraction and `std::ranges::size`. * `libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.create/allocate_shared_for_overwrite.pass.cpp` * `libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.create/make_shared_for_overwrite.pass.cpp` * `libcxx/test/std/utilities/smartptr/unique.ptr/unique.ptr.create/make_unique_for_overwrite.default_init.pass.cpp` + Fix MSVC "warning C4309: 'initializing': truncation of constant value". + MSVC emits this warning because `0xDE` is outside the range of `char` (signed by default in our implementation). * `libcxx/test/support/concat_macros.h` + Fix MSVC "warning C4244: 'argument': conversion from '`char16_t`' to '`const char`', possible loss of data". + Fix MSVC "warning C4244: 'argument': conversion from '`unsigned int`' to '`const char`', possible loss of data". + This code was very recently introduced by @mordante in #73395.	2023-12-10 13:41:30 -08:00
Stephan T. Lavavej	bfdc562d0c	[libc++] Fix copy-paste damage in ranges::rotate_copy and its test (#74544) ... Found while running libc++'s tests with MSVC's STL. `ranges::rotate_copy` takes `forward_iterator`s as this test's comment banner correctly depicts. However, this test had bogus assertions expecting that `ranges::rotate_copy` would be constrained away for not-quite-**bidi** iterators. @philnik777 confirmed that these were copy-paste relics from the `ranges::reverse_copy` test. I fixed this by replacing the assertions with the test types that aren't quite **forward** iterators/ranges. Additionally, I noticed that the top-level `test()` function was missing coverage with the weakest possible `forward_iterator<int*>`. This revealed that the product code in `ranges_rotate_copy.h` was similarly damaged. In addition to fixing it by taking `forward_iterator` and `forward_range` as depicted in the Standard, this drops the inclusion of `<__iterator/reverse_iterator.h>` as this algorithm doesn't need `std::__reverse_range`.	2023-12-06 02:29:09 -08:00
Stephan T. Lavavej	f1db578f0d	[libc++][test] Fix assumptions that std::array iterators are pointers (#74430) ... Found while running libc++'s tests with MSVC's STL, where `std::array` iterators are never pointers. Most of these changes are reasonably self-explanatory (the `std::array`s are right there, and the sometimes-slightly-wrapped raw pointer types are a short distance away). A couple of changes are less obvious: In `libcxx/test/std/containers/from_range_helpers.h`, `wrap_input()` is called with `Iter` types that are constructible from raw pointers. It's also sometimes called with an `array` as the `input`, so the first overload was implicitly assuming that `array` iterators are pointers. We can fix this assumption by providing a dedicated overload for `array`, just like the one for `vector` immediately below. Finally, `from_range_helpers.h` should explicitly include both `<array>` and `<vector>`, even though they were apparently being dragged in already. In `libcxx/test/std/containers/views/views.span/span.cons/iterator_sentinel.pass.cpp`, fix `throw_operator_minus`. The error was pretty complicated, caused by the concepts machinery noticing that `value_type` and `element_type` were inconsistent. In the template instantiation context, you can see the critical detail that `throw_operator_minus<std::_Array_iterator>` is being formed. Fortunately, the fix is extremely simple. To produce `element_type` (which retains any cv-qualification, unlike `value_type`), we shouldn't attempt to `remove_pointer` with the iterator type `It`. Instead, we've already obtained the `reference` type, so we can `remove_reference_t`. (This is modern code, where we have access to the alias templates, so I saw no reason to use the older verbose form.)	2023-12-05 11:25:42 -05:00
Stephan T. Lavavej	164c204a19	[libc++][test] Fix simple warnings (#74186) ... Found while running libc++'s tests with MSVC's STL. This fixes 3 kinds of warnings: - Add void-casts to fix `-Wunused-variable` warnings. - Avoid sign/truncation warnings in `ConvertibleToIntegral.h`. - Add `TEST_STD_AT_LEAST_23_OR_RUNTIME_EVALUATED` to avoid mixing preprocessor and runtime tests. - Cleanup: Add `TEST_STD_AT_LEAST_20_OR_RUNTIME_EVALUATED` for consistency.	2023-12-05 09:46:41 -05:00
Stephan T. Lavavej	c000f754bf	[libc++][test] Avoid non-Standard zero-length arrays (#74183) ... Found while running libc++'s test suite with MSVC's STL, where we use both MSVC's compiler and Clang/LLVM. MSVC's compiler rejects the non-Standard extension of zero-length arrays. For conformance, I'm changing these occurrences to `std::array<int, 0>`. Many of these files already had `#include <array>`; I'm adding it to the rest. I wanted to add `-Wzero-length-array` to `libcxx/utils/libcxx/test/params.py` to prevent future occurrences, but it complained about product code 😿 : ``` In file included from /home/runner/_work/llvm-project/llvm-project/libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream.formatted.arithmetic/long.pass.cpp:18: In file included from /home/runner/_work/llvm-project/llvm-project/build/generic-cxx03/include/c++/v1/istream:170: In file included from /home/runner/_work/llvm-project/llvm-project/build/generic-cxx03/include/c++/v1/ostream:172: In file included from /home/runner/_work/llvm-project/llvm-project/build/generic-cxx03/include/c++/v1/__system_error/error_code.h:18: In file included from /home/runner/_work/llvm-project/llvm-project/build/generic-cxx03/include/c++/v1/__system_error/error_category.h:15: /home/runner/_work/llvm-project/llvm-project/build/generic-cxx03/include/c++/v1/string:811:25: error: zero size arrays are an extension [-Werror,-Wzero-length-array] 811 | char __padding_[sizeof(value_type) - 1]; | ^~~~~~~~~~~~~~~~~~~~~~ /home/runner/_work/llvm-project/llvm-project/build/generic-cxx03/include/c++/v1/string:817:19: note: in instantiation of member class 'std::basic_string<char>::__short' requested here 817 | static_assert(sizeof(__short) == (sizeof(value_type) * (__min_cap + 1)), "__short has an unexpected size."); | ^ /home/runner/_work/llvm-project/llvm-project/build/generic-cxx03/include/c++/v1/string:2069:5: note: in instantiation of template class 'std::basic_string<char>' requested here 2069 | _LIBCPP_STRING_V1_EXTERN_TEMPLATE_LIST(_LIBCPP_DECLARE, char) | ^ /home/runner/_work/llvm-project/llvm-project/build/generic-cxx03/include/c++/v1/__string/extern_template_lists.h:31:60: note: expanded from macro '_LIBCPP_STRING_V1_EXTERN_TEMPLATE_LIST' 31 | _Func(_LIBCPP_EXPORTED_FROM_ABI basic_string<_CharType>& basic_string<_CharType>::replace(size_type, size_type, value_type const*, size_type)) \ | ^ ``` I pushed a tiny commit to fix unrelated comment typos, in an attempt to clear out spurious CI failures.	2023-12-03 10:47:09 +01:00
Michael Platings	be811d1617	[libc++] Run picolibc tests with qemu ... This patch actually runs the tests for picolibc behind an emulator, removing a few workarounds and increasing coverage. Differential Revision: https://reviews.llvm.org/D155521	2023-11-29 17:21:08 -05:00
Nikolas Klauser	ed27a4edb0	[libc++][PSTL] Implement std::equal (#72448) ... Differential Revision: https://reviews.llvm.org/D157131 Co-authored-by: Louis Dionne <ldionne.2@gmail.com>	2023-11-28 16:02:18 -05:00
Louis Dionne	2b7cca1ccf	[libc++] Add missing REQUIRES for exception handling test ... It otherwise fails on Windows.	2023-11-27 15:04:04 -05:00
Stephan T. Lavavej	f5832bab6f	[libc++][test] Cleanup typos and unnecessary semicolons (#73435) ... I've structured this into a series of commits for even easier reviewing, if that helps. I could easily split this up into separate PRs if desired, but as this is low-risk with simple edits, I thought one PR would be easiest. * Drop unnecessary semicolons after function definitions. * Cleanup comment typos. * Cleanup `static_assert` typos. * Cleanup test code typos. + There should be no functional changes, assuming I've changed all occurrences. * ~~Fix massive test code typos.~~ + This was a real problem, but needed more surgery. I reverted those changes here, and @philnik777 is fixing this properly with #73444. * clang-formatting as requested by the CI.	2023-11-27 02:11:24 +01:00