aboutsummaryrefslogtreecommitdiffstats
path: root/lib/hipe/doc/src/notes.xml
blob: f47868296afd06de2c8c8cdfdd04d00b36053722 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE chapter SYSTEM "chapter.dtd">

<chapter>
  <header>
    <copyright>
      <year>2006</year><year>2018</year>
      <holder>Ericsson AB. All Rights Reserved.</holder>
    </copyright>
    <legalnotice>
      Licensed under the Apache License, Version 2.0 (the "License");
      you may not use this file except in compliance with the License.
      You may obtain a copy of the License at
 
          http://www.apache.org/licenses/LICENSE-2.0

      Unless required by applicable law or agreed to in writing, software
      distributed under the License is distributed on an "AS IS" BASIS,
      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      See the License for the specific language governing permissions and
      limitations under the License.

    </legalnotice>

    <title>HiPE Release Notes</title>
    <prepared>otp_appnotes</prepared>
    <docno>nil</docno>
    <date>nil</date>
    <rev>nil</rev>
    <file>notes.xml</file>
  </header>
  <p>This document describes the changes made to HiPE.</p>

<section><title>Hipe 3.18</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Optimize <c>receive</c> statements that are only waiting
	    for messages containing a reference created before the
	    receive. All messages that existed in the queue when the
	    reference was created will be bypassed, as they cannot
	    possibly contain the reference. This optimization has
	    existed for vanilla BEAM since OTP R14.</p>
          <p>
	    Own Id: OTP-14785 Aux Id: PR-1632 </p>
        </item>
        <item>
          <p>
	    Add validation pass to hipe compiler to detect internal
	    errors causing primop calls that may trigger an unsafe GC
	    at run-time. The pass can be disabled with option
	    <c>no_verify_gcsafe</c>.</p>
          <p>
	    Own Id: OTP-14900 Aux Id: PR-1685, PR-1621 </p>
        </item>
        <item>
          <p>
	    Make hipe compiled code work on x86_64 (amd64) with OS
	    security feature PIE, where executable code can be loaded
	    into a random location. Old behavior, if hipe was
	    enabled, was to disable PIE build options for the VM.</p>
          <p>
	    Own Id: OTP-14903</p>
        </item>
        <item>
          <p>
	    Inline more type test BIFs; <c>is_number</c>,
	    <c>is_bitstring</c>, <c>is_map</c>.</p>
          <p>
	    Own Id: OTP-14941 Aux Id: PR-1718 </p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.17.1</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Fix HiPE bug for binary constructs like
	    <c>&lt;&lt;X/utf8&gt;&gt;</c> which could in rare cases
	    cause faulty results or VM crash.</p>
          <p>
	    This fix affects both the <c>hipe</c> compiler and
	    <c>erts</c> runtime in an <em>incompatible</em> way. Old
	    hipe compiled files need to be recompiled to load and run
	    properly as native.</p>
          <p>
	    *** POTENTIAL INCOMPATIBILITY ***</p>
          <p>
	    Own Id: OTP-14850 Aux Id: PR-1664 </p>
        </item>
        <item>
	    <p>The BEAM compiler chooses not to perform tailcall
	    optimisations for some calls in tail position, for
	    example to some built-in functions. However, when the
	    ErLLVM HiPE backend is used, LLVM may choose to perform
	    tailcall optimisation on these calls, breaking the
	    expected semantics.</p>
	    <p>To preserve the precise semantics exhibited by BEAM,
	    the 'notail' marker, present in LLVM since version 3.8,
	    is added to call instructions that BEAM has not turned
	    into tail calls, which inhibits LLVM from performing
	    tail-call optimisation in turn.</p>
          <p>
	    Own Id: OTP-14886</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.17</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Fix bug for hipe compiled code using
	    <c>&lt;&lt;X/utf32&gt;&gt;</c> binary construction that
	    could cause faulty result or even VM crash.</p>
          <p>
	    On architectures other than x86_64, code need to be
	    recompiled to benefit from this fix.</p>
          <p>
	    Own Id: OTP-14740</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Added documentation about limitations of hipe compared to
	    beam compiled code.</p>
          <p>
	    Own Id: OTP-14767</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.16.1</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
	    <p> Fix a bug regarding map types that caused Dialyzer to
	    go into an infinite loop. A consequence of the fix is
	    that compound map keys such as maps and tuples sometimes
	    are handled with less precision than before. </p>
          <p>
	    Own Id: OTP-14572 Aux Id: seq13319 </p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    General Unicode improvements.</p>
          <p>
	    Own Id: OTP-14462</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.16</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Fix hipe compiler flags <c>o0</c> and <c>o1</c> that have
	    previously been ignored by mistake.</p>
          <p>
	    Own Id: OTP-13862 Aux Id: PR-1154 </p>
        </item>
        <item>
          <p>
	    Fix LLVM backend to not convert all remote calls to own
	    module, like <c>?MODULE:foo()</c>, into local calls.</p>
          <p>
	    Own Id: OTP-13983</p>
        </item>
        <item>
          <p>
	    Hipe optional LLVM backend does require LLVM version 3.9
	    or later as older versions forced strong dependencies on
	    erts internals structures.</p>
          <p>
	    Own Id: OTP-14238</p>
        </item>
        <item>
          <p>
	    Fix a bug that has been seen causing failed loading of
	    hipe compiled modules on NetBSD due to unaligned data
	    pointers.</p>
          <p>
	    Own Id: OTP-14302 Aux Id: ERL-376, PR-1386 </p>
        </item>
        <item>
          <p>
	    Fix miscompilation bug in hipe that could cause wrong
	    function clause to be called from non-tail calls, where
	    the return value is unused, if the right function clause
	    is only reachable from those non-tail calls.</p>
          <p>
	    Own Id: OTP-14306 Aux Id: ERL-278, PR-1392 </p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Improve hipe compilation time for large functions.</p>
          <p>
	    Own Id: OTP-13810 Aux Id: PR-1124 </p>
        </item>
        <item>
	    <p>Replaced usage of deprecated symbolic <seealso
	    marker="erts:erlang#type-time_unit"><c>time
	    unit</c></seealso> representations.</p>
          <p>
	    Own Id: OTP-13831 Aux Id: OTP-13735 </p>
        </item>
        <item>
          <p>
	    Speed up hipe compile time register allocation for larger
	    function.</p>
          <p>
	    Own Id: OTP-13879</p>
        </item>
        <item>
          <p>
	    Various code generation improvements.</p>
          <p>
	    Own Id: OTP-14261 Aux Id: PR-1360 </p>
        </item>
        <item>
          <p>
	    Improve hipe compiler to generate code with better CPU
	    register utilization at runtime by the use of 'Live Range
	    Splitting' techniques.</p>
          <p>
	    Own Id: OTP-14293 Aux Id: PR-1380 </p>
        </item>
        <item>
          <p>
	    Allow HiPE to run on VM built with
	    <c>--enable-m32-build</c>.</p>
          <p>
	    Own Id: OTP-14330 Aux Id: PR-1397 </p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.15.4</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
	    <p> Fix a bug concerning parameterized opaque types. </p>
          <p>
	    Own Id: OTP-14130</p>
        </item>
        <item>
          <p>
	    Fixed xml issues in old release notes</p>
          <p>
	    Own Id: OTP-14269</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.15.3</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Fix flow control bug in hipe compiler that may cause
	    compile time crash.</p>
          <p>
	    Own Id: OTP-13965 Aux Id: PR-1253 </p>
        </item>
        <item>
          <p>
	    Fix bug in native compilation of bitstring pattern
	    matching causing erroneous runtime matching result. The
	    bug only affects code containing constant-valued segments
	    whose size is expressed in bits; it is triggered when the
	    pattern matching against these segments fails (i.e., when
	    the next clause needs to be tried).</p>
          <p>
	    Own Id: OTP-14005</p>
        </item>
        <item>
          <p>
	    Workaround in HiPE LLVM backend for a bug in LLVM 3.9.
	    The bug could cause LLVM-compiled modules to be rejected
	    during loading with a badarg exception in
	    hipe_bifs:enter_sdecs/1, but also cause corruption or
	    segmentation faults i runtime.</p>
          <p>
	    Own Id: OTP-14027 Aux Id: ERL-292, PR-1237 </p>
        </item>
        <item>
          <p>
	    Fix a bug in HiPE LLVM backend involving incorrect type
	    tests of atoms sometimes causing incorrect behaviour or
	    even segfaults.</p>
          <p>
	    Own Id: OTP-14028 Aux Id: PR-1237 </p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.15.2</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Fixed various hipe compiler backend bugs affecting mostly
	    ARM and SPARC.</p>
          <p>
	    Own Id: OTP-13846 Aux Id: PR-1146 </p>
        </item>
        <item>
          <p>
	    Fixed some Dialyzer warnings and code cleanup for the
	    Sparc compiler backend.</p>
          <p>
	    Own Id: OTP-13861 Aux Id: PR-1148 </p>
        </item>
        <item>
	    <p> Fix erl_bif_types opaque bug. </p>
          <p>
	    Own Id: OTP-13878 Aux Id: PR-1161, ERL-249 </p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Fix erl_types opaque match order</p>
          <p>
	    Own Id: OTP-13876</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.15.1</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    HiPE compiler crashed, during compilation, in some cases
	    that involved inlining of float operations on complicated
	    control flow graphs.</p>
          <p>
	    Own Id: OTP-13407 Aux Id: PR-984 </p>
        </item>
        <item>
          <p>
	    Various fixes and improvements to the HiPE LLVM backend.</p>
	    <list> <item>Add support for LLVM 3.7 and 3.8 in the
	    HiPE/LLVM x86_64 backend</item> <item>Reinstate support
	    for the LLVM backend on x86 (works OK for LLVM 3.5 to 3.7
	    -- LLVM 3.8 has a bug that prevents it from generating
	    correct native code on x86)</item> </list>
          <p>
	    Own Id: OTP-13626</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Elimination of <c>maps:is_key/2</c> calls to HiPE</p>
          <p>
	    Own Id: OTP-13625 Aux Id: PR-1069 </p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.15</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Fix pretty printing of Core Maps</p>
          <p>
	    Literal maps could cause Dialyzer to crash when pretty
	    printing the results.</p>
          <p>
	    Own Id: OTP-13238</p>
        </item>
        <item>
          <p>
	    Dialyzer warnings removed.</p>
          <p>
	    Own Id: OTP-13379</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Fix HiPE ErLLVM code generation for pattern matching with
	    UTF binaries.</p>
          <p>
	    Own Id: OTP-13269</p>
        </item>
        <item>
          <p>
	    Fix various binary construction inconsistencies for hipe
	    compiled code.</p> <list> <item>Passing bad field sizes to
	    binary constructions would throw <c>badarith</c> rather
	    than <c>badarg</c>. Worse, in guards, when the unit size
	    of the field was 1, the exception would leak rather than
	    failing the function clause match.</item> <item>Passing
	    bignums as field sizes to binary constructions would
	    always fail (and always with <c>badarg</c>).</item>
	    <item>A bug in bs_init_bits that cased binary
	    constructions to fail with system_limit if they were at
	    least 1/8th of the actual limit.</item> <item>Compiler
	    crashes when matches against an integer literal whose
	    size fits an unsigned word, but not a signed word or
	    matches against an integer literal that whose size is
	    larger than the largest allowed bignum.</item> <item>Very
	    large binary constructions that should fail with
	    system_limit could instead fail with <c>badarg</c> or
	    even succeed with a faulty result.</item> <item>Add
	    missing check for unit size match when inserting a
	    binary. For example, a faulty expression like
	    <c>&lt;&lt;&lt;&lt;1:7&gt;&gt;/binary&gt;&gt;</c> would
	    succeed.</item> </list>
          <p>
	    Own Id: OTP-13272</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.14</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Fix hipe bug causing segfaults when native code
	    constructs binaries starting with a zero-length integer
	    field.</p>
          <p>
	    Own Id: OTP-13048</p>
        </item>
        <item>
          <p>
	    Reintroduce the <c>erlang:make_fun/3</c> BIF in
	    erl_bif_types.</p>
          <p>
	    Own Id: OTP-13068</p>
        </item>
        <item>
          <p>
	    In certain cases of matching with very big binaries, the
	    HiPE compiler generated code that would fail the match,
	    even in cases that the matching was successful. The
	    problem was more quite noticeable on 32-bit platforms.</p>
          <p>
	    Own Id: OTP-13092</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    mikpe/hipe_x86_signal-musl-support</p>
          <p>
	    Own Id: OTP-13159</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.13</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
	    <p> Fix bugs concerning <c>erlang:abs/1</c>. </p>
          <p>
	    Own Id: OTP-12948</p>
        </item>
        <item>
	    <p> Fix a bug concerning <c>lists:keydelete/3</c> with
	    union and opaque types. </p>
          <p>
	    Own Id: OTP-12949</p>
        </item>
        <item>
          <p>
	    A beam file compiled by hipe for an incompatible runtime
	    system was sometimes not rejected by the loader, which
	    could lead to vm crash. This fix will also allow the same
	    hipe compiler to be used by both normal and debug-built
	    vm.</p>
          <p>
	    Own Id: OTP-12962</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    New function <c>hipe:erts_checksum/0</c> which returns a
	    value identifying the target runtime system for the
	    compiler. Used by dialyzer for its beam cache directory.</p>
          <p>
	    Own Id: OTP-12963 Aux Id: OTP-12962, OTP-12964 </p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.12</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
	    <p> Fix a minor bug in the handling of opaque types. </p>
          <p>
	    Own Id: OTP-12666</p>
        </item>
        <item>
          <p>
	    Fix hipe bug when matching a "writable" binary. The bug
	    has been seen to sometimes cause a failed binary matching
	    of a correct utf8 character, but other symptoms are also
	    possible.</p>
          <p>
	    Own Id: OTP-12667</p>
        </item>
        <item>
          <p>
	    Optimizations and code cleanup in hipe code loader.</p>
          <p>
	    Own Id: OTP-12816</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Improved error handling when memory allocation for HiPE
	    code fails.</p>
          <p>
	    Own Id: OTP-12448</p>
        </item>
        <item>
          <p>
	    Allow use of complete interface of cerl_pmatch module</p>
          <p>
	    Own Id: OTP-12794</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.11.3</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Fix HiPE for ARM when Erlang VM is compiled for Thumb
	    execution mode. This was a problem on e.g. Ubuntu which
	    configures its system GCC to generate Thumb by default.</p>
          <p>
	    Own Id: OTP-12405</p>
        </item>
        <item>
          <p>
	    Reduced lock contention of dynamic function lookups (like
	    apply) from hipe compiled code.</p>
          <p>
	    Own Id: OTP-12557</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Fix two bugs in HiPE compiler regarding floating-points,
	    both leading to crash during compilation. The
	    target-specific code generators failed to handle integer
	    to floating-point conversion instructions with constant
	    operands. The middle-end could use an incorrect
	    representation for copies between floating-point
	    registers.</p>
          <p>
	    Own Id: OTP-12413</p>
        </item>
        <item>
          <p>
	    Improved error handling when memory allocation for HiPE
	    code fails.</p>
          <p>
	    Own Id: OTP-12448</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.11.2</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Fixed internal elf_format hrl file to contain valid
	    erlang</p>
          <p>
	    Own Id: OTP-12322</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.11.1</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
	    <p> The pretty-printing of bitstrings has been corrected.
	    </p>
          <p>
	    Own Id: OTP-12015</p>
        </item>
        <item>
	    <p> A bug concerning <c>is_record/2,3</c> has been fixed,
	    as well as some cases where Dialyzer could crash due to
	    reaching system limits. </p>
          <p>
	    Own Id: OTP-12018</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.11</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    A Dialyzer crash involving analysis of Map types has now
	    been fixed.</p>
          <p>
	    Own Id: OTP-11947</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Handle Maps instructions get_map_elements, put_map_assoc,
	    put_map_exact in HiPE compiler.</p>
          <p>
	    Own Id: OTP-11900</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.10.3</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Fix compilation with 'no_remove_comments' (Thanks to
	    Johannes Weißl)</p>
          <p>
	    Own Id: OTP-11564</p>
        </item>
        <item>
          <p>
	    Application upgrade (appup) files are corrected for the
	    following applications: </p>
          <p>
	    <c>asn1, common_test, compiler, crypto, debugger,
	    dialyzer, edoc, eldap, erl_docgen, et, eunit, gs, hipe,
	    inets, observer, odbc, os_mon, otp_mibs, parsetools,
	    percept, public_key, reltool, runtime_tools, ssh,
	    syntax_tools, test_server, tools, typer, webtool, wx,
	    xmerl</c></p>
          <p>
	    A new test utility for testing appup files is added to
	    test_server. This is now used by most applications in
	    OTP.</p>
          <p>
	    (Thanks to Tobias Schlager)</p>
          <p>
	    Own Id: OTP-11744</p>
        </item>
        <item>
          <p>
	    There is now a test suite for the Hipe application</p>
          <p>
	    Own Id: OTP-11748</p>
        </item>
        <item>
          <p>
	    Support for a LLVM backend has been added in HiPE</p>
          <p>
	    Own Id: OTP-11801</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
	    <p> The pre-defined types <c>array/0</c>, <c>dict/0</c>,
	    <c>digraph/0</c>, <c>gb_set/0</c>, <c>gb_tree/0</c>,
	    <c>queue/0</c>, <c>set/0</c>, and <c>tid/0</c> have been
	    deprecated. They will be removed in Erlang/OTP 18.0. </p>
	    <p> Instead the types <c>array:array/0</c>,
	    <c>dict:dict/0</c>, <c>digraph:graph/0</c>,
	    <c>gb_set:set/0</c>, <c>gb_tree:tree/0</c>,
	    <c>queue:queue/0</c>, <c>sets:set/0</c>, and
	    <c>ets:tid/0</c> can be used. (Note: it has always been
	    necessary to use <c>ets:tid/0</c>.) </p> <p> It is
	    allowed in Erlang/OTP 17.0 to locally re-define the types
	    <c>array/0</c>, <c>dict/0</c>, and so on. </p> <p> New
	    types <c>array:array/1</c>, <c>dict:dict/2</c>,
	    <c>gb_sets:set/1</c>, <c>gb_trees:tree/2</c>,
	    <c>queue:queue/1</c>, and <c>sets:set/1</c> have been
	    added. </p> <p> A compiler option,
	    <c>nowarn_deprecated_type</c>, has been introduced. By
	    including the attribute </p> <c>
	    -compile(nowarn_deprecated_type).</c> <p> in an Erlang
	    source file, warnings about deprecated types can be
	    avoided in Erlang/OTP 17.0. </p> <p> The option can also
	    be given as a compiler flag: </p> <c> erlc
	    +nowarn_deprecated_type file.erl</c>
          <p>
	    Own Id: OTP-10342</p>
        </item>
        <item>
          <p>
	    EEP43: New data type - Maps</p>
          <p>
	    With Maps you may for instance:</p>
          <taglist>
            <tag/> <item><c>M0 = #{ a =&gt; 1, b =&gt; 2}, % create
	      associations</c></item>
            <tag/><item><c>M1 = M0#{ a := 10 }, % update values</c></item>
            <tag/><item><c>M2 = M1#{ "hi" =&gt;
	      "hello"}, % add new associations</c></item>
            <tag/><item><c>#{ "hi" := V1, a := V2, b := V3} = M2.
               % match keys with values</c></item>
          </taglist>
          <p>
	    For information on how to use Maps please see Map Expressions in the
		<seealso marker="doc/reference_manual:expressions#map_expressions">
			Reference Manual</seealso>.</p>
          <p>
	    The current implementation is without the following
	    features:</p>
          <taglist>
            <tag/><item>No variable keys</item>
	    <tag/><item>No single value access</item>
            <tag/><item>No map comprehensions</item>
          </taglist>
          <p>
	    Note that Maps is <em>experimental</em> during OTP 17.0.</p>
          <p>
	    Own Id: OTP-11616</p>
        </item>
        <item>
	    <p> Parameterized opaque types have been introduced. </p>
          <p>
	    Own Id: OTP-11625</p>
        </item>
        <item>
          <p>
	    Add support for the compilation of the is_map/1 and
	    map_size/1 guards to native code.</p>
          <p>
	    Own Id: OTP-11831</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.10.2.2</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Fixed a dialyzer crash when using remote types in the
	    tail position of a maybe_improper_list/2 type. Thanks to
	    Kostis Sagonas</p>
          <p>
	    Own Id: OTP-11374</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.10.2.1</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    The encoding of the <c>notes.xml</c> file has been
	    changed from latin1 to utf-8 to avoid future merge
	    problems.</p>
          <p>
	    Own Id: OTP-11310</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.10.2</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Fix the title of hipe_app documentation page. Thanks to
	    Loïc Hoguin.</p>
          <p>
	    Own Id: OTP-10904</p>
        </item>
        <item>
          <p>
	    Fix native code compiler crash involving bs_match_string.
	    Thanks to Kostis Sagonas.</p>
          <p>
	    Own Id: OTP-10985</p>
        </item>
        <item>
          <p>
	    Loosen the assumptions of code that handles escaping
	    functions. Thanks to Kostis Sagonas</p>
          <p>
	    Own Id: OTP-11031</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.10.1</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Bug fixed in hipe to where it did not allow unicode code
	    points 16#FFFE and 16#FFFF in bit syntax in natively
	    compiled modules.</p>
          <p>
	    Own Id: OTP-10867</p>
        </item>
        <item>
          <p>
	    Fix bug in hipe compiled code related to the handling of
	    <c>is_number/1</c>. (Thanks to Sebastian Egner and
	    Johannes Weißl for minimal test code and Kostis for quick
	    patch)</p>
          <p>
	    Own Id: OTP-10897</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.10</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
	    <p> The type <c>ascii_string()</c> in the <c>base64</c>
	    module has been corrected. The type
	    <c>file:file_info()</c> has been cleaned up. The type
	    <c>file:fd()</c> has been made opaque in the
	    documentation. </p>
          <p>
	    Own Id: OTP-10624 Aux Id: kunagi-352 [263] </p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
	    <p> Support for Unicode has been implemented. </p>
          <p>
	    Own Id: OTP-10302</p>
        </item>
        <item>
	    <p>Where necessary a comment stating encoding has been
	    added to Erlang files. The comment is meant to be removed
	    in Erlang/OTP R17B when UTF-8 becomes the default
	    encoding. </p>
          <p>
	    Own Id: OTP-10630</p>
        </item>
        <item>
          <p>
	    Update .gitignore (lib/hipe/boot_ebin). Thanks to Tuncer
	    Ayaz.</p>
          <p>
	    Own Id: OTP-10705</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.9.3</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    A faulty spec for process_info/2 could cause false
	    dialyzer warnings. The spec is corrected.</p>
          <p>
	    Own Id: OTP-10584</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.9.2</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
	    <p> Correct handling of type names in contracts. Fix
	    crash related to contract checking. Do not rewrite
	    unchanged PLT. </p>
          <p>
	    Own Id: OTP-10083</p>
        </item>
        <item>
          <p>
	    Changes in comments and minor code cleanups</p>
          <p>
	    Thanks to Kostis Sagonas.</p>
          <p>
	    Own Id: OTP-10230</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Remove all code, documentation, options and diagnostic
	    functions which were related to the experimental hybrid
	    heap implementation.</p>
          <p>
	    Own Id: OTP-10105</p>
        </item>
        <item>
	    <p> Bugs in <c>erl_types:t_inf()</c> (HiPE) and in
	    <c>dialyzer_dataflow</c> (Dialyzer) have been fixed. </p>
          <p>
	    Own Id: OTP-10191</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.9.1</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    References to <c>is_constant/1</c> (which was removed in
	    the R12 release) has been removed from documentation and
	    code.</p>
          <p>
	    Own Id: OTP-6454 Aux Id: seq10407 </p>
        </item>
        <item>
          <p>
	    Fixed a discrepancy in compile_info</p>
          <p>
	    The BEAM disassembler used the atom 'none' to signify the
	    absence of a compile_info chunk in a .beam file. This
	    clashed with the type declaration of the compile_info
	    field of a #beam_file{} record as containing a list. Now
	    [] signifies the absence of this chunk. This simplifies
	    the code and avoids a dialyzer warning.</p>
          <p>
	    Own Id: OTP-9917</p>
        </item>
        <item>
          <p>
	    Make dialyzer recognize the process_flag option sensitive
	    add missing specs to documentation (Thanks to Tobias
	    Schlager)</p>
          <p>
	    Own Id: OTP-9923</p>
        </item>
        <item>
          <p>
	    Remove hipe_ceach from hipe.app.src to fix
	    reltool-generated release startup. (Thanks to Tim
	    Stewart)</p>
          <p>
	    Own Id: OTP-9939</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.9</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
	    <list> <item><p>No warnings for underspecs with remote
	    types</p></item> <item><p> Fix crash in Typer</p></item>
	    <item><p>Fix Dialyzer's warning for its own
	    code</p></item> <item><p>Fix Dialyzer's warnings in
	    HiPE</p></item> <item><p>Add file/line info in a
	    particular Dialyzer crash</p></item> <item><p>Update
	    inets test results</p></item> </list>
          <p>
	    Own Id: OTP-9758</p>
        </item>
        <item>
	    <list> <item><p>Correct callback spec in application
	    module</p></item> <item><p>Refine warning about callback
	    specs with extra ranges</p></item> <item><p>Cleanup
	    autoimport compiler directives</p></item> <item><p>Fix
	    Dialyzer's warnings in typer</p></item> <item><p>Fix
	    Dialyzer's warning for its own code</p></item>
	    <item><p>Fix bug in Dialyzer's behaviours
	    analysis</p></item> <item><p>Fix crash in
	    Dialyzer</p></item> <item><p>Variable substitution was
	    not generalizing any unknown variables.</p></item>
	    </list>
          <p>
	    Own Id: OTP-9776</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Possible to run HiPE without floating point exceptions
	    (FPE). Useful on platforms that lack reliable FPE. Slower
	    float operations compared to HiPE with FPE.</p>
          <p>
	    Own Id: OTP-9724</p>
        </item>
        <item>
          <p>
	    HiPE compiler: The possibility to compile and load
	    selected functions from a module has been removed.</p>
          <p>
	    *** POTENTIAL INCOMPATIBILITY ***</p>
          <p>
	    Own Id: OTP-9751</p>
        </item>
        <item>
          <p>
	    <c>filename:find_src/1,2</c> will now work on stripped
	    BEAM files (reported by Per Hedeland). The HiPE compiler
	    will also work on stripped BEAM files. The BEAM compiler
	    will no longer include compilation options given in the
	    source code itself in <c>M:module_info(compile)</c>
	    (because those options will be applied anyway if the
	    module is re-compiled).</p>
          <p>
	    Own Id: OTP-9752</p>
        </item>
        <item>
	    <p> Optimize <c>erl_types:t_unify()</c>. </p>
          <p>
	    Own Id: OTP-9768</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.8.1</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Clean up hipe.hrl.src (Thanks to Tuncer Ayaz)</p>
          <p>
	    Own Id: OTP-9511</p>
        </item>
        <item>
          <p>
	    Fix bug with binary pattern matching of floats of
	    variable size</p>
          <p>
	    Pattern matching of floats with variable size
	    (&lt;&lt;F:S/float&gt;&gt;) did always fail. Judging from
	    similar code for ints, this bug is simply a typo.(Thanks
	    to Paul Guyot)</p>
          <p>
	    Own Id: OTP-9556</p>
        </item>
        <item>
          <p>
	    Quote atoms if necessary in types</p>
          <p>
	    Atoms in some occurrences were not correctly quoted when
	    formatted to strings, for instance by the typer program
	    (Thanks to Tomas Abrahamsson)</p>
          <p>
	    Update Dialyzer's reference results</p>
          <p>
	    Own Id: OTP-9560</p>
        </item>
        <item>
          <p>
	    Fix typer's crash for nonexisting files Remove unused
	    macro Fix bug in dataflow Decrease tuple arity limit This
	    fixes a memory related crash.</p>
          <p>
	    Own Id: OTP-9597</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Types for several BIFs have been extended/corrected. Also
	    the types for types for <c>lists:keyfind/3</c>,
	    <c>lists:keysearch/3</c>, and <c>lists:keyemember/3</c>
	    have been corrected. The incorrect/incomplete types could
	    cause false dialyzer warnings.</p>
          <p>
	    Own Id: OTP-9496</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.8</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Fix hipe bug causing minor heap corruption related to
	    binary matching. The bug has not been confirmed as the
	    cause of any actual fault symptom.</p>
          <p>
	    Own Id: OTP-9182</p>
        </item>
        <item>
          <p>
	    Enable HiPE by default when compiling for PPC64</p>
          <p>
	    Own Id: OTP-9198</p>
        </item>
        <item>
          <p>
	    Fix handling of &lt;&lt;_:N,_:_*M&gt;&gt; type
	    expressions Fix the argument of
	    erlang:list_to_bitstring/1 Remove unneeded function
	    'sequence/2' Same functionality provided by
	    string:join/2.</p>
          <p>
	    Own Id: OTP-9277</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.7.9</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Fix erroneous fail info of a hipe_bs_primop</p>
          <p>
	    Own Id: OTP-9036</p>
        </item>
        <item>
          <p>
	    The change fixes a bug in the translation of 'bs_add'
	    BEAM instruction to HiPE's Icode representation. When
	    these instructions appeared in a guard context the
	    previous translation was obviously buggy.</p>
          <p>
	    Own Id: OTP-9044</p>
        </item>
        <item>
          <p>
	    Sanitize the specs of the code module</p>
          <p>
	    After the addition of unicode_binary() to the
	    file:filename() type, dialyzer started complaining about
	    erroneous or incomplete specs in some functions of the
	    'code' module. The culprit was hard-coded information in
	    erl_bif_types for functions of this module, which were
	    not updated. Since these functions have proper specs
	    these days and code duplication (pun intended) is never a
	    good idea, their type information was removed from
	    erl_bif_types.</p>
          <p>
	    While doing this, some erroneous comments were fixed in
	    the code module and also made sure that the code now runs
	    without dialyzer warnings even when the
	    -Wunmatched_returns option is used.</p>
          <p>
	    Some cleanups were applied to erl_bif_types too.</p>
          <p>
	    Own Id: OTP-9100</p>
        </item>
        <item>
          <p>
	    Fix bug in the simplification of inexact comparisons</p>
          <p>
	    On 31/1/2011 Paul Guyot reported a bug in the native code
	    compilation of inexact equality/inequality tests between
	    floats and integers. The relevant test was:</p>
          <p>
	    f(X) -&gt; Y = X / 2, Y == 0.</p>
          <p>
	    and hipe erroneously evaluated the calls f(0) and f(0.0)
	    to 'false'.</p>
          <p>
	    The culprit was in the simplification code of the Icode
	    range analysis which used an erroneous test (lists:any/1
	    instead of lists:all/1).</p>
          <p>
	    Own Id: OTP-9101</p>
        </item>
        <item>
          <p>
	    Document exiting and garbage_collecting process statuses</p>
          <p>
	    Own Id: OTP-9102</p>
        </item>
        <item>
          <p>
	    Remove hipe constants pool</p>
          <p>
	    Hipe constants used to be allocated within a single,
	    fixed-size pool for interaction with the garbage
	    collector. However, the garbage collector no longer
	    depends on constants being allocated within a single
	    pool, and the fixed size of the pool both meant
	    unnecessary allocations on most deployments and crashes
	    on deployments requiring more constants.</p>
          <p>
	    The code was simplified to directly invoke erts_alloc.
	    Debugging and undocumented function
	    hipe_bifs:show_literals/0 was removed (it returned true
	    and output text to the console), and debugging and
	    undocumented function hipe_bifs:constants_size/0 was
	    rewritten with a global to count the size of allocated
	    constants.</p>
          <p>
	    Own Id: OTP-9128</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.7.8.1</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Several type specifications for standard libraries were
	    wrong in the R14B01 release. This is now corrected. The
	    corrections concern types in re,io,filename and the
	    module erlang itself.</p>
          <p>
	    Own Id: OTP-9008</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.7.8</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Compiler warnings were eliminated.</p>
          <p>
	    Own Id: OTP-8855</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.7.7</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
	    <p>The HiPE compiler could crash when compiling certain
	    modules (the bug has been latent, and been exposed by new
	    optimizations introduced in the BEAM compiler in R14A).
	    (Thanks to Mikael Pettersson.)</p>
          <p>
	    Own Id: OTP-8800</p>
        </item>
        <item>
          <p>
	    hipe:load/1 was broken. (Thanks to Paul Guyot.)</p>
          <p>
	    Own Id: OTP-8802</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.7.6</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
	    <p><c>receive</c> statements that can only read out a
	    newly created reference are now specially optimized so
	    that it will execute in constant time regardless of the
	    number of messages in the receive queue for the process.
	    That optimization will benefit calls to
	    <c>gen_server:call()</c>. (See <c>gen:do_call/4</c> for
	    an example of a receive statement that will be
	    optimized.)</p>
          <p>
	    Own Id: OTP-8623</p>
        </item>
        <item>
          <p>
	    Various changes to dialyzer-related files for R14.</p>
          <p>
	    - Dialyzer properly supports the new attribute
	    -export_type and checks that remote types only refer to
	    exported types. A warning is produced if some
	    files/applications refer to types defined in modules
	    which are neither in the PLT nor in the analyzed
	    applications.</p>
          <p>
	    - Support for detecting data races involving whereis/1
	    and unregister/1.</p>
          <p>
	    - More precise identification of the reason(s) why a
	    record construction violates the types declared for its
	    fields.</p>
          <p>
	    - Fixed bug in the handling of the 'or' guard.</p>
          <p>
	    - Better handling of the erlang:element/2 BIF.</p>
          <p>
	    - Complete handling of Erlang BIFs.</p>
          <p>
	    Own Id: OTP-8699</p>
        </item>
        <item>
	    <p><c>eprof</c> has been reimplemented with support in
	    the Erlang virtual machine and is now both faster (i.e.
	    slows down the code being measured less) and scales much
	    better. In measurements we saw speed-ups compared to the
	    old eprof ranging from 6 times (for sequential code that
	    only uses one scheduler/core) up to 84 times (for
	    parallel code that uses 8 cores).</p>
	    <p>Note: The API for the <c>eprof</c> has been cleaned up
	    and extended. See the documentation.</p>
          <p>
	    *** POTENTIAL INCOMPATIBILITY ***</p>
          <p>
	    Own Id: OTP-8706</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.7.5</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
	    <p>The documentation is now possible to build in an open
	    source environment after a number of bugs are fixed and
	    some features are added in the documentation build
	    process. </p>
	    <p>- The arity calculation is updated.</p>
	    <p>- The module prefix used in the function names for
	    bif's are removed in the generated links so the links
	    will look like
	    "http://www.erlang.org/doc/man/erlang.html#append_element-2"
	    instead of
	    "http://www.erlang.org/doc/man/erlang.html#erlang:append_element-2".</p>
	    <p>- Enhanced the menu positioning in the html
	    documentation when a new page is loaded.</p>
	    <p>- A number of corrections in the generation of man
	    pages (thanks to Sergei Golovan)</p>
	    <p>- The legal notice is taken from the xml book file so
	    OTP's build process can be used for non OTP
	    applications.</p>
          <p>
	    Own Id: OTP-8343</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.7.4</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    The documentation is now built with open source tools
	    (xsltproc and fop) that exists on most platforms. One
	    visible change is that the frames are removed.</p>
          <p>
	    Own Id: OTP-8201</p>
        </item>
        <item>
          <p>
	    Misc updates.</p>
          <p>
	    Own Id: OTP-8301</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.7.3</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Various small bugs (one involving the handling of large
	    binaries) were corrected and some additions to its
	    functionality and/or code cleanups were done.</p>
          <p>
	    Own Id: OTP-8189</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.7.2</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Miscellaneous updates.</p>
          <p>
	    Own Id: OTP-8038</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.7.1</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Minor updates and bug fixes.</p>
          <p>
	    Own Id: OTP-7958</p>
        </item>
      </list>
    </section>

</section>


<section><title>Hipe 3.7</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Miscellaneous updates.</p>
          <p>
	    Own Id: OTP-7877</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.6.9</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
	    <p>The <c>--disable-hipe</c> option for the
	    <c>configure</c> will now completely disable the hipe
	    run-time in the emulator, as is the expected
	    behaviour.</p>
          <p>
	    Own Id: OTP-7631</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.6.8</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Minor updates.</p>
          <p>
	    Own Id: OTP-7522</p>
        </item>
      </list>
    </section>

</section>


<section><title>Hipe 3.6.7</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Minor changes.</p>
          <p>
	    Own Id: OTP-7388</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.6.6</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
	    <p>A fix for an #include problem which caused the FP
	    exception test to fail unnecessarily on
	    debian/glibc-2.7/x86 systems.</p>
	    <p>Added SIGFPE loop detection to the FP exception test.
	    This prevents the test from looping indefinitely, which
	    could happen when the CPU is supported (so we can enable
	    FP exceptions on it) but the OS isn't (so we can't write
	    a proper SIGFPE handler). x86 on an unsupported OS is
	    known to have had this problem.</p>
          <p>
	    Own Id: OTP-7254</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    HiPE now also supports little-endian ARM processors.</p>
          <p>
	    Own Id: OTP-7255</p>
        </item>
      </list>
    </section>

</section>

<section><title>Hipe 3.6.5</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    HIPE: Corrected the choice of interface to the send/3 and
	    setnode/3 BIFs for native-compiled code. Using the
	    incorrect interface could, in unusual circumstances, lead
	    to random runtime errors.</p>
          <p>
	    Own Id: OTP-7067</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    The HiPE compiler's SPARC backend has been rewritten,
	    improving its correctness and long-term maintainability.</p>
          <p>
	    Own Id: OTP-7133</p>
        </item>
      </list>
    </section>

</section>

  <section>
    <title>Hipe 3.6.3</title>

    <section>
      <title>Improvements and New Features</title>
      <list type="bulleted">
        <item>
          <p>Minor Makefile changes.</p>
          <p>Own Id: OTP-6689</p>
        </item>
        <item>
          <p>Miscellanous updates.</p>
          <p>Own Id: OTP-6738</p>
        </item>
      </list>
    </section>
  </section>

  <section>
    <title>Hipe 3.6.2</title>

    <section>
      <title>Improvements and New Features</title>
      <list type="bulleted">
        <item>
          <p>Miscellanous improvements.</p>
          <p>Own Id: OTP-6577</p>
        </item>
      </list>
    </section>
  </section>

  <section>
    <title>Hipe 3.6.1.1</title>

    <section>
      <title>Fixed Bugs and Malfunctions</title>
      <list type="bulleted">
        <item>
          <p>Dialyzer could fail to analyze certain beam files that
            used try/catch.</p>
          <p>Own Id: OTP-6449 Aux Id: seq10563 </p>
        </item>
      </list>
    </section>
  </section>

  <section>
    <title>Hipe 3.6.1</title>

    <section>
      <title>Improvements and New Features</title>
      <list type="bulleted">
        <item>
          <p>HiPE runtime system:</p>
          <p>* added notes about supported systems to README</p>
          <p>* support 32-bit x86 on FreeBSD</p>
          <p>* autoenable HiPE on FreeBSD (32-bit x86) and Solaris
            (64-bit x86)</p>
          <p>* updated x86 runtime system to support glibc-2.5</p>
          <p>* work around probable gcc-4.1.1 bug affecting the x86
            runtime system</p>
          <p>HiPE compiler:</p>
          <p>* improved performance of integer multiplications on
            all platforms</p>
          <p>* corrected a code optimisation error in R11B-2 that
            broke some bsl/bsr operations on all platforms</p>
          <p>* corrected a type error in the ARM backend which
            could cause the compiler to crash</p>
          <p>* corrected an error in the SPARC backend's naive
            register allocator which could throw the compiler into an
            infinite loop</p>
          <p>Own Id: OTP-6423</p>
        </item>
      </list>
    </section>
  </section>

  <section>
    <title>Hipe 3.6.0</title>

    <section>
      <title>Improvements and New Features</title>
      <list type="bulleted">
        <item>
          <p>Support for native code on Solaris 10/AMD64.</p>
          <p>Support for native code on FreeBSD/AMD64.</p>
          <p>Native code now handles external funs (<c><![CDATA[fun M:F/A]]></c>). Native code can now also apply so-called
            tuple-funs (<c><![CDATA[{M,F}]]></c>). (Tuple funs are NOT
            recommended for new code; they are deprecated and will be
            removed in some future release.)</p>
          <p>Own Id: OTP-6305</p>
        </item>
      </list>
    </section>
  </section>

  <section>
    <title>Hipe 3.5.6</title>

    <section>
      <title>Improvements and New Features</title>
      <list type="bulleted">
        <item>
          <p>Improved compilation of receives for the SMP runtime
            system.</p>
          <p>Improved code quality in HiPE compiler on ARM.</p>
          <p>Fix bug in handling of re-raised exceptions in
            try-catch.</p>
          <p>(HiPE loader) When native code is incompatible with
            the current runtime system, fall back to loading the BEAM
            code.</p>
          <p>Own Id: OTP-6127</p>
        </item>
      </list>
    </section>
  </section>
</chapter>