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
|
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Variable Names Plan — LLVM 13 documentation</title>
<link rel="stylesheet" href="../_static/pygments.css" type="text/css" />
<link rel="stylesheet" href="../_static/llvm-theme.css" type="text/css" />
<script id="documentation_options" data-url_root="../" src="../_static/documentation_options.js"></script>
<script src="../_static/jquery.js"></script>
<script src="../_static/underscore.js"></script>
<script src="../_static/doctools.js"></script>
<link rel="index" title="Index" href="../genindex.html" />
<link rel="search" title="Search" href="../search.html" />
<link rel="next" title="Vector Predication Roadmap" href="VectorPredication.html" />
<link rel="prev" title="Test-Suite Extensions" href="TestSuite.html" />
<style type="text/css">
table.right { float: right; margin-left: 20px; }
table.right td { border: 1px solid #ccc; }
</style>
</head><body>
<div class="logo">
<a href="../index.html">
<img src="../_static/logo.png"
alt="LLVM Logo" width="250" height="88"/></a>
</div>
<div class="related" role="navigation" aria-label="related navigation">
<h3>Navigation</h3>
<ul>
<li class="right" style="margin-right: 10px">
<a href="../genindex.html" title="General Index"
accesskey="I">index</a></li>
<li class="right" >
<a href="VectorPredication.html" title="Vector Predication Roadmap"
accesskey="N">next</a> |</li>
<li class="right" >
<a href="TestSuite.html" title="Test-Suite Extensions"
accesskey="P">previous</a> |</li>
<li><a href="https://llvm.org/">LLVM Home</a> | </li>
<li><a href="../index.html">Documentation</a>»</li>
<li class="nav-item nav-item-1"><a href="../GettingInvolved.html" accesskey="U">Getting Involved</a> »</li>
<li class="nav-item nav-item-this"><a href="">Variable Names Plan</a></li>
</ul>
</div>
<div class="sphinxsidebar" role="navigation" aria-label="main navigation">
<div class="sphinxsidebarwrapper">
<h3>Documentation</h3>
<ul class="want-points">
<li><a href="https://llvm.org/docs/GettingStartedTutorials.html">Getting Started/Tutorials</a></li>
<li><a href="https://llvm.org/docs/UserGuides.html">User Guides</a></li>
<li><a href="https://llvm.org/docs/Reference.html">Reference</a></li>
</ul>
<h3>Getting Involved</h3>
<ul class="want-points">
<li><a href="https://llvm.org/docs/Contributing.html">Contributing to LLVM</a></li>
<li><a href="https://llvm.org/docs/HowToSubmitABug.html">Submitting Bug Reports</a></li>
<li><a href="https://llvm.org/docs/GettingInvolved.html#mailing-lists">Mailing Lists</a></li>
<li><a href="https://llvm.org/docs/GettingInvolved.html#irc">IRC</a></li>
<li><a href="https://llvm.org/docs/GettingInvolved.html#meetups-and-social-events">Meetups and Social Events</a></li>
</ul>
<h3>Additional Links</h3>
<ul class="want-points">
<li><a href="https://llvm.org/docs/FAQ.html">FAQ</a></li>
<li><a href="https://llvm.org/docs/Lexicon.html">Glossary</a></li>
<li><a href="https://llvm.org/pubs">Publications</a></li>
<li><a href="https://github.com/llvm/llvm-project//">Github Repository</a></li>
</ul>
<div role="note" aria-label="source link">
<h3>This Page</h3>
<ul class="this-page-menu">
<li><a href="../_sources/Proposals/VariableNames.rst.txt"
rel="nofollow">Show Source</a></li>
</ul>
</div>
<div id="searchbox" style="display: none" role="search">
<h3 id="searchlabel">Quick search</h3>
<div class="searchformwrapper">
<form class="search" action="../search.html" method="get">
<input type="text" name="q" aria-labelledby="searchlabel" />
<input type="submit" value="Go" />
</form>
</div>
</div>
<script>$('#searchbox').show(0);</script>
</div>
</div>
<div class="document">
<div class="documentwrapper">
<div class="bodywrapper">
<div class="body" role="main">
<div class="section" id="variable-names-plan">
<h1>Variable Names Plan<a class="headerlink" href="#variable-names-plan" title="Permalink to this headline">¶</a></h1>
<div class="contents local topic" id="contents">
<ul class="simple">
<li><p><a class="reference internal" href="#too-long-didn-t-read" id="id76">Too Long; Didn’t Read</a></p></li>
<li><p><a class="reference internal" href="#introduction" id="id77">Introduction</a></p></li>
<li><p><a class="reference internal" href="#variable-names-coding-standard-options" id="id78">Variable Names Coding Standard Options</a></p>
<ul>
<li><p><a class="reference internal" href="#differentiating-variable-kinds" id="id79">Differentiating variable kinds</a></p></li>
</ul>
</li>
<li><p><a class="reference internal" href="#reducing-the-number-of-acronyms" id="id80">Reducing the number of acronyms</a></p></li>
<li><p><a class="reference internal" href="#transition-options" id="id81">Transition Options</a></p>
<ul>
<li><p><a class="reference internal" href="#keep-the-current-coding-standard" id="id82">Keep the current coding standard</a></p></li>
<li><p><a class="reference internal" href="#laissez-faire" id="id83">Laissez faire</a></p>
<ul>
<li><p><a class="reference internal" href="#advantages" id="id84">Advantages</a></p></li>
<li><p><a class="reference internal" href="#disadvantages" id="id85">Disadvantages</a></p></li>
</ul>
</li>
<li><p><a class="reference internal" href="#big-bang" id="id86">Big bang</a></p>
<ul>
<li><p><a class="reference internal" href="#keeping-git-blame-usable" id="id87">Keeping git blame usable</a></p></li>
<li><p><a class="reference internal" href="#minimising-cost-of-downstream-merges" id="id88">Minimising cost of downstream merges</a></p></li>
</ul>
</li>
</ul>
</li>
<li><p><a class="reference internal" href="#provisional-plan" id="id89">Provisional Plan</a></p></li>
<li><p><a class="reference internal" href="#references" id="id90">References</a></p></li>
</ul>
</div>
<p>This plan is <em>provisional</em>. It is not agreed upon. It is written with the
intention of capturing the desires and concerns of the LLVM community, and
forming them into a plan that can be agreed upon.
The original author is somewhat naïve in the ways of LLVM so there will
inevitably be some details that are flawed. You can help - you can edit this
page (preferably with a Phabricator review for larger changes) or reply to the
<a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130083.html">Request For Comments thread</a>.</p>
<div class="section" id="too-long-didn-t-read">
<h2><a class="toc-backref" href="#id76">Too Long; Didn’t Read</a><a class="headerlink" href="#too-long-didn-t-read" title="Permalink to this headline">¶</a></h2>
<p>Improve the readability of LLVM code.</p>
</div>
<div class="section" id="introduction">
<h2><a class="toc-backref" href="#id77">Introduction</a><a class="headerlink" href="#introduction" title="Permalink to this headline">¶</a></h2>
<p>The current <a class="reference external" href="../CodingStandards.html#name-types-functions-variables-and-enumerators-properly">variable naming rule</a>
states:</p>
<blockquote>
<div><p>Variable names should be nouns (as they represent state). The name should be
camel case, and start with an upper case letter (e.g. Leader or Boats).</p>
</div></blockquote>
<p>This rule is the same as that for type names. This is a problem because the
type name cannot be reused for a variable name <a class="footnote-reference brackets" href="#id17" id="id1">*</a>. LLVM developers tend to
work around this by either prepending <code class="docutils literal notranslate"><span class="pre">The</span></code> to the type name:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">Triple</span> <span class="n">TheTriple</span><span class="p">;</span>
</pre></div>
</div>
<p>… or more commonly use an acronym, despite the coding standard stating “Avoid
abbreviations unless they are well known”:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">Triple</span> <span class="n">T</span><span class="p">;</span>
</pre></div>
</div>
<p>The proliferation of acronyms leads to hard-to-read code such as <a class="reference external" href="https://github.com/llvm/llvm-project/blob/0a8bc14ad7f3209fe702d18e250194cd90188596/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp#L7445">this</a>:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">InnerLoopVectorizer</span> <span class="n">LB</span><span class="p">(</span><span class="n">L</span><span class="p">,</span> <span class="n">PSE</span><span class="p">,</span> <span class="n">LI</span><span class="p">,</span> <span class="n">DT</span><span class="p">,</span> <span class="n">TLI</span><span class="p">,</span> <span class="n">TTI</span><span class="p">,</span> <span class="n">AC</span><span class="p">,</span> <span class="n">ORE</span><span class="p">,</span> <span class="n">VF</span><span class="o">.</span><span class="n">Width</span><span class="p">,</span> <span class="n">IC</span><span class="p">,</span>
<span class="o">&</span><span class="n">LVL</span><span class="p">,</span> <span class="o">&</span><span class="n">CM</span><span class="p">);</span>
</pre></div>
</div>
<p>Many other coding guidelines <a class="reference internal" href="#lldb" id="id2"><span>[LLDB]</span></a> <a class="reference internal" href="#google" id="id3"><span>[Google]</span></a> <a class="reference internal" href="#webkit" id="id4"><span>[WebKit]</span></a> <a class="reference internal" href="#qt" id="id5"><span>[Qt]</span></a> <a class="reference internal" href="#rust" id="id6"><span>[Rust]</span></a> <a class="reference internal" href="#swift" id="id7"><span>[Swift]</span></a>
<a class="reference internal" href="#python" id="id8"><span>[Python]</span></a> require that variable names begin with a lower case letter in contrast
to class names which begin with a capital letter. This convention means that the
most readable variable name also requires the least thought:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">Triple</span> <span class="n">triple</span><span class="p">;</span>
</pre></div>
</div>
<p>There is some agreement that the current rule is broken <a class="reference internal" href="#lattneragree" id="id9"><span>[LattnerAgree]</span></a>
<a class="reference internal" href="#arsenaultagree" id="id10"><span>[ArsenaultAgree]</span></a> <a class="reference internal" href="#robinsonagree" id="id11"><span>[RobinsonAgree]</span></a> and that acronyms are an obstacle to reading
new code <a class="reference internal" href="#malyutindistinguish" id="id12"><span>[MalyutinDistinguish]</span></a> <a class="reference internal" href="#carruthacronym" id="id13"><span>[CarruthAcronym]</span></a> <a class="reference internal" href="#picusacronym" id="id14"><span>[PicusAcronym]</span></a>. There are
some opposing views <a class="reference internal" href="#parzyszekacronym2" id="id15"><span>[ParzyszekAcronym2]</span></a> <a class="reference internal" href="#ricciacronyms" id="id16"><span>[RicciAcronyms]</span></a>.</p>
<p>This work-in-progress proposal is to change the coding standard for variable
names to require that they start with a lower case letter.</p>
<dl class="footnote brackets">
<dt class="label" id="id17"><span class="brackets"><a class="fn-backref" href="#id1">*</a></span></dt>
<dd><p>In <a class="reference external" href="https://github.com/llvm/llvm-project/blob/8b72080d4d7b13072f371712eed333f987b7a18e/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp#L2727">some cases</a>
the type name <em>is</em> reused as a variable name, but this shadows the type name
and confuses many debuggers <a class="reference internal" href="#denisovcamelback" id="id18"><span>[DenisovCamelBack]</span></a>.</p>
</dd>
</dl>
</div>
<div class="section" id="variable-names-coding-standard-options">
<h2><a class="toc-backref" href="#id78">Variable Names Coding Standard Options</a><a class="headerlink" href="#variable-names-coding-standard-options" title="Permalink to this headline">¶</a></h2>
<p>There are two main options for variable names that begin with a lower case
letter: <code class="docutils literal notranslate"><span class="pre">camelBack</span></code> and <code class="docutils literal notranslate"><span class="pre">lower_case</span></code>. (These are also known by other names
but here we use the terminology from clang-tidy).</p>
<p><code class="docutils literal notranslate"><span class="pre">camelBack</span></code> is consistent with <a class="reference internal" href="#webkit" id="id19"><span>[WebKit]</span></a>, <a class="reference internal" href="#qt" id="id20"><span>[Qt]</span></a> and <a class="reference internal" href="#swift" id="id21"><span>[Swift]</span></a> while
<code class="docutils literal notranslate"><span class="pre">lower_case</span></code> is consistent with <a class="reference internal" href="#lldb" id="id22"><span>[LLDB]</span></a>, <a class="reference internal" href="#google" id="id23"><span>[Google]</span></a>, <a class="reference internal" href="#rust" id="id24"><span>[Rust]</span></a> and <a class="reference internal" href="#python" id="id25"><span>[Python]</span></a>.</p>
<p><code class="docutils literal notranslate"><span class="pre">camelBack</span></code> is already used for function names, which may be considered an
advantage <a class="reference internal" href="#lattnerfunction" id="id26"><span>[LattnerFunction]</span></a> or a disadvantage <a class="reference internal" href="#carruthfunction" id="id27"><span>[CarruthFunction]</span></a>.</p>
<p>Approval for <code class="docutils literal notranslate"><span class="pre">camelBack</span></code> was expressed by <a class="reference internal" href="#denisovcamelback" id="id28"><span>[DenisovCamelBack]</span></a>
<a class="reference internal" href="#lattnerfunction" id="id29"><span>[LattnerFunction]</span></a> <a class="reference internal" href="#ivanovicdistinguish" id="id30"><span>[IvanovicDistinguish]</span></a>.
Opposition to <code class="docutils literal notranslate"><span class="pre">camelBack</span></code> was expressed by <a class="reference internal" href="#carruthcamelback" id="id31"><span>[CarruthCamelBack]</span></a>
<a class="reference internal" href="#turnercamelback" id="id32"><span>[TurnerCamelBack]</span></a>.
Approval for <code class="docutils literal notranslate"><span class="pre">lower_case</span></code> was expressed by <a class="reference internal" href="#carruthlower" id="id33"><span>[CarruthLower]</span></a>
<a class="reference internal" href="#carruthcamelback" id="id34"><span>[CarruthCamelBack]</span></a> <a class="reference internal" href="#turnerlldb" id="id35"><span>[TurnerLLDB]</span></a>.
Opposition to <code class="docutils literal notranslate"><span class="pre">lower_case</span></code> was expressed by <a class="reference internal" href="#lattnerlower" id="id36"><span>[LattnerLower]</span></a>.</p>
<div class="section" id="differentiating-variable-kinds">
<h3><a class="toc-backref" href="#id79">Differentiating variable kinds</a><a class="headerlink" href="#differentiating-variable-kinds" title="Permalink to this headline">¶</a></h3>
<p>An additional requested change is to distinguish between different kinds of
variables <a class="reference internal" href="#robinsondistinguish" id="id37"><span>[RobinsonDistinguish]</span></a> <a class="reference internal" href="#robinsondistinguish2" id="id38"><span>[RobinsonDistinguish2]</span></a> <a class="reference internal" href="#jonesdistinguish" id="id39"><span>[JonesDistinguish]</span></a>
<a class="reference internal" href="#ivanovicdistinguish" id="id40"><span>[IvanovicDistinguish]</span></a> <a class="reference internal" href="#carruthdistinguish" id="id41"><span>[CarruthDistinguish]</span></a> <a class="reference internal" href="#malyutindistinguish" id="id42"><span>[MalyutinDistinguish]</span></a>.</p>
<p>Others oppose this idea <a class="reference internal" href="#hahnledistinguish" id="id43"><span>[HähnleDistinguish]</span></a> <a class="reference internal" href="#greenedistinguish" id="id44"><span>[GreeneDistinguish]</span></a>
<a class="reference internal" href="#hendersonprefix" id="id45"><span>[HendersonPrefix]</span></a>.</p>
<p>A possibility is for member variables to be prefixed with <code class="docutils literal notranslate"><span class="pre">m_</span></code> and for global
variables to be prefixed with <code class="docutils literal notranslate"><span class="pre">g_</span></code> to distinguish them from local variables.
This is consistent with <a class="reference internal" href="#lldb" id="id46"><span>[LLDB]</span></a>. The <code class="docutils literal notranslate"><span class="pre">m_</span></code> prefix is consistent with <a class="reference internal" href="#webkit" id="id47"><span>[WebKit]</span></a>.</p>
<p>A variation is for member variables to be prefixed with <code class="docutils literal notranslate"><span class="pre">m</span></code>
<a class="reference internal" href="#ivanovicdistinguish" id="id48"><span>[IvanovicDistinguish]</span></a> <a class="reference internal" href="#beylsdistinguish" id="id49"><span>[BeylsDistinguish]</span></a>. This is consistent with <a class="reference internal" href="#mozilla" id="id50"><span>[Mozilla]</span></a>.</p>
<p>Another option is for member variables to be suffixed with <code class="docutils literal notranslate"><span class="pre">_</span></code> which is
consistent with <a class="reference internal" href="#google" id="id51"><span>[Google]</span></a> and similar to <a class="reference internal" href="#python" id="id52"><span>[Python]</span></a>. Opposed by
<a class="reference internal" href="#parzyszekdistinguish" id="id53"><span>[ParzyszekDistinguish]</span></a>.</p>
</div>
</div>
<div class="section" id="reducing-the-number-of-acronyms">
<h2><a class="toc-backref" href="#id80">Reducing the number of acronyms</a><a class="headerlink" href="#reducing-the-number-of-acronyms" title="Permalink to this headline">¶</a></h2>
<p>While switching coding standard will make it easier to use non-acronym names for
new code, it doesn’t improve the existing large body of code that uses acronyms
extensively to the detriment of its readability. Further, it is natural and
generally encouraged that new code be written in the style of the surrounding
code. Therefore it is likely that much newly written code will also use
acronyms despite what the coding standard says, much as it is today.</p>
<p>As well as changing the case of variable names, they could also be expanded to
their non-acronym form e.g. <code class="docutils literal notranslate"><span class="pre">Triple</span> <span class="pre">T</span></code> → <code class="docutils literal notranslate"><span class="pre">Triple</span> <span class="pre">triple</span></code>.</p>
<p>There is support for expanding many acronyms <a class="reference internal" href="#carruthacronym" id="id54"><span>[CarruthAcronym]</span></a> <a class="reference internal" href="#picusacronym" id="id55"><span>[PicusAcronym]</span></a>
but there is a preference that expanding acronyms be deferred
<a class="reference internal" href="#parzyszekacronym" id="id56"><span>[ParzyszekAcronym]</span></a> <a class="reference internal" href="#carruthacronym" id="id57"><span>[CarruthAcronym]</span></a>.</p>
<p>The consensus within the community seems to be that at least some acronyms are
valuable <a class="reference internal" href="#parzyszekacronym" id="id58"><span>[ParzyszekAcronym]</span></a> <a class="reference internal" href="#lattneracronym" id="id59"><span>[LattnerAcronym]</span></a>. The most commonly cited acronym
is <code class="docutils literal notranslate"><span class="pre">TLI</span></code> however that is used to refer to both <code class="docutils literal notranslate"><span class="pre">TargetLowering</span></code> and
<code class="docutils literal notranslate"><span class="pre">TargetLibraryInfo</span></code> <a class="reference internal" href="#greenedistinguish" id="id60"><span>[GreeneDistinguish]</span></a>.</p>
<p>The following is a list of acronyms considered sufficiently useful that the
benefit of using them outweighs the cost of learning them. Acronyms that are
either not on the list or are used to refer to a different type should be
expanded.</p>
<table class="docutils align-default">
<colgroup>
<col style="width: 68%" />
<col style="width: 32%" />
</colgroup>
<thead>
<tr class="row-odd"><th class="head"><p>Class name</p></th>
<th class="head"><p>Variable name</p></th>
</tr>
</thead>
<tbody>
<tr class="row-even"><td><p>DeterministicFiniteAutomaton</p></td>
<td><p>dfa</p></td>
</tr>
<tr class="row-odd"><td><p>DominatorTree</p></td>
<td><p>dt</p></td>
</tr>
<tr class="row-even"><td><p>LoopInfo</p></td>
<td><p>li</p></td>
</tr>
<tr class="row-odd"><td><p>MachineFunction</p></td>
<td><p>mf</p></td>
</tr>
<tr class="row-even"><td><p>MachineInstr</p></td>
<td><p>mi</p></td>
</tr>
<tr class="row-odd"><td><p>MachineRegisterInfo</p></td>
<td><p>mri</p></td>
</tr>
<tr class="row-even"><td><p>ScalarEvolution</p></td>
<td><p>se</p></td>
</tr>
<tr class="row-odd"><td><p>TargetInstrInfo</p></td>
<td><p>tii</p></td>
</tr>
<tr class="row-even"><td><p>TargetLibraryInfo</p></td>
<td><p>tli</p></td>
</tr>
<tr class="row-odd"><td><p>TargetRegisterInfo</p></td>
<td><p>tri</p></td>
</tr>
</tbody>
</table>
<p>In some cases renaming acronyms to the full type name will result in overly
verbose code. Unlike most classes, a variable’s scope is limited and therefore
some of its purpose can implied from that scope, meaning that fewer words are
necessary to give it a clear name. For example, in an optimization pass the reader
can assume that a variable’s purpose relates to optimization and therefore an
<code class="docutils literal notranslate"><span class="pre">OptimizationRemarkEmitter</span></code> variable could be given the name <code class="docutils literal notranslate"><span class="pre">remarkEmitter</span></code>
or even <code class="docutils literal notranslate"><span class="pre">remarker</span></code>.</p>
<p>The following is a list of longer class names and the associated shorter
variable name.</p>
<table class="docutils align-default">
<colgroup>
<col style="width: 66%" />
<col style="width: 34%" />
</colgroup>
<thead>
<tr class="row-odd"><th class="head"><p>Class name</p></th>
<th class="head"><p>Variable name</p></th>
</tr>
</thead>
<tbody>
<tr class="row-even"><td><p>BasicBlock</p></td>
<td><p>block</p></td>
</tr>
<tr class="row-odd"><td><p>ConstantExpr</p></td>
<td><p>expr</p></td>
</tr>
<tr class="row-even"><td><p>ExecutionEngine</p></td>
<td><p>engine</p></td>
</tr>
<tr class="row-odd"><td><p>MachineOperand</p></td>
<td><p>operand</p></td>
</tr>
<tr class="row-even"><td><p>OptimizationRemarkEmitter</p></td>
<td><p>remarker</p></td>
</tr>
<tr class="row-odd"><td><p>PreservedAnalyses</p></td>
<td><p>analyses</p></td>
</tr>
<tr class="row-even"><td><p>PreservedAnalysesChecker</p></td>
<td><p>checker</p></td>
</tr>
<tr class="row-odd"><td><p>TargetLowering</p></td>
<td><p>lowering</p></td>
</tr>
<tr class="row-even"><td><p>TargetMachine</p></td>
<td><p>machine</p></td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="transition-options">
<h2><a class="toc-backref" href="#id81">Transition Options</a><a class="headerlink" href="#transition-options" title="Permalink to this headline">¶</a></h2>
<p>There are three main options for transitioning:</p>
<ol class="arabic simple">
<li><p>Keep the current coding standard</p></li>
<li><p>Laissez faire</p></li>
<li><p>Big bang</p></li>
</ol>
<div class="section" id="keep-the-current-coding-standard">
<h3><a class="toc-backref" href="#id82">Keep the current coding standard</a><a class="headerlink" href="#keep-the-current-coding-standard" title="Permalink to this headline">¶</a></h3>
<p>Proponents of keeping the current coding standard (i.e. not transitioning at
all) question whether the cost of transition outweighs the benefit
<a class="reference internal" href="#emersonconcern" id="id61"><span>[EmersonConcern]</span></a> <a class="reference internal" href="#reamesconcern" id="id62"><span>[ReamesConcern]</span></a> <a class="reference internal" href="#bradburyconcern" id="id63"><span>[BradburyConcern]</span></a>.
The costs are that <code class="docutils literal notranslate"><span class="pre">git</span> <span class="pre">blame</span></code> will become less usable; and that merging the
changes will be costly for downstream maintainers. See <a class="reference internal" href="#big-bang">Big bang</a> for potential
mitigations.</p>
</div>
<div class="section" id="laissez-faire">
<h3><a class="toc-backref" href="#id83">Laissez faire</a><a class="headerlink" href="#laissez-faire" title="Permalink to this headline">¶</a></h3>
<p>The coding standard could allow both <code class="docutils literal notranslate"><span class="pre">CamelCase</span></code> and <code class="docutils literal notranslate"><span class="pre">camelBack</span></code> styles for
variable names <a class="reference internal" href="#lattnertransition" id="id64"><span>[LattnerTransition]</span></a>.</p>
<p>A code review to implement this is at <a class="reference external" href="https://reviews.llvm.org/D57896">https://reviews.llvm.org/D57896</a>.</p>
<div class="section" id="advantages">
<h4><a class="toc-backref" href="#id84">Advantages</a><a class="headerlink" href="#advantages" title="Permalink to this headline">¶</a></h4>
<blockquote>
<div><ul class="simple">
<li><p>Very easy to implement initially.</p></li>
</ul>
</div></blockquote>
</div>
<div class="section" id="disadvantages">
<h4><a class="toc-backref" href="#id85">Disadvantages</a><a class="headerlink" href="#disadvantages" title="Permalink to this headline">¶</a></h4>
<blockquote>
<div><ul class="simple">
<li><p>Leads to inconsistency <a class="reference internal" href="#bradburyconcern" id="id65"><span>[BradburyConcern]</span></a> <a class="reference internal" href="#aminiinconsistent" id="id66"><span>[AminiInconsistent]</span></a>.</p></li>
<li><p>Inconsistency means it will be hard to know at a guess what name a variable
will have <a class="reference internal" href="#dasinconsistent" id="id67"><span>[DasInconsistent]</span></a> <a class="reference internal" href="#carruthinconsistent" id="id68"><span>[CarruthInconsistent]</span></a>.</p></li>
<li><p>Some large-scale renaming may happen anyway, leading to its disadvantages
without any mitigations.</p></li>
</ul>
</div></blockquote>
</div>
</div>
<div class="section" id="big-bang">
<h3><a class="toc-backref" href="#id86">Big bang</a><a class="headerlink" href="#big-bang" title="Permalink to this headline">¶</a></h3>
<p>With this approach, variables will be renamed by an automated script in a series
of large commits.</p>
<p>The principle advantage of this approach is that it minimises the cost of
inconsistency <a class="reference internal" href="#bradburytransition" id="id69"><span>[BradburyTransition]</span></a> <a class="reference internal" href="#robinsontransition" id="id70"><span>[RobinsonTransition]</span></a>.</p>
<p>It goes against a policy of avoiding large-scale reformatting of existing code
<a class="reference internal" href="#greenedistinguish" id="id71"><span>[GreeneDistinguish]</span></a>.</p>
<p>It has been suggested that LLD would be a good starter project for the renaming
<a class="reference internal" href="#ueyama" id="id72"><span>[Ueyama]</span></a>.</p>
<div class="section" id="keeping-git-blame-usable">
<h4><a class="toc-backref" href="#id87">Keeping git blame usable</a><a class="headerlink" href="#keeping-git-blame-usable" title="Permalink to this headline">¶</a></h4>
<p><code class="docutils literal notranslate"><span class="pre">git</span> <span class="pre">blame</span></code> (or <code class="docutils literal notranslate"><span class="pre">git</span> <span class="pre">annotate</span></code>) permits quickly identifying the commit that
changed a given line in a file. After renaming variables, many lines will show
as being changed by that one commit, requiring a further invocation of <code class="docutils literal notranslate"><span class="pre">git</span>
<span class="pre">blame</span></code> to identify prior, more interesting commits <a class="reference internal" href="#greenegitblame" id="id73"><span>[GreeneGitBlame]</span></a>
<a class="reference internal" href="#ricciacronyms" id="id74"><span>[RicciAcronyms]</span></a>.</p>
<p><strong>Mitigation</strong>: <a class="reference external" href="https://commondatastorage.googleapis.com/chrome-infra-docs/flat/depot_tools/docs/html/git-hyper-blame.html">git-hyper-blame</a>
can ignore or “look through” a given set of commits.
A <code class="docutils literal notranslate"><span class="pre">.git-blame-ignore-revs</span></code> file identifying the variable renaming commits
could be added to the LLVM git repository root directory.
It is being <a class="reference external" href="https://public-inbox.org/git/20190324235020.49706-1-michael@platin.gs/">investigated</a>
whether similar functionality could be added to <code class="docutils literal notranslate"><span class="pre">git</span> <span class="pre">blame</span></code> itself.</p>
</div>
<div class="section" id="minimising-cost-of-downstream-merges">
<h4><a class="toc-backref" href="#id88">Minimising cost of downstream merges</a><a class="headerlink" href="#minimising-cost-of-downstream-merges" title="Permalink to this headline">¶</a></h4>
<p>There are many forks of LLVM with downstream changes. Merging a large-scale
renaming change could be difficult for the fork maintainers.</p>
<p><strong>Mitigation</strong>: A large-scale renaming would be automated. A fork maintainer can
merge from the commit immediately before the renaming, then apply the renaming
script to their own branch. They can then merge again from the renaming commit,
resolving all conflicts by choosing their own version. This could be tested on
the <a class="reference internal" href="#sve" id="id75"><span>[SVE]</span></a> fork.</p>
</div>
</div>
</div>
<div class="section" id="provisional-plan">
<h2><a class="toc-backref" href="#id89">Provisional Plan</a><a class="headerlink" href="#provisional-plan" title="Permalink to this headline">¶</a></h2>
<p>This is a provisional plan for the <a class="reference internal" href="#big-bang">Big bang</a> approach. It has not been agreed.</p>
<ol class="arabic">
<li><p>Investigate improving <code class="docutils literal notranslate"><span class="pre">git</span> <span class="pre">blame</span></code>. The extent to which it can be made to
“look through” commits may impact how big a change can be made.</p></li>
<li><p>Write a script to expand acronyms.</p></li>
<li><p>Experiment and perform dry runs of the various refactoring options.
Results can be published in forks of the LLVM Git repository.</p></li>
<li><p>Consider the evidence and agree on the new policy.</p></li>
<li><p>Agree & announce a date for the renaming of the starter project (LLD).</p></li>
<li><p>Update the <a class="reference external" href="../CodingStandards.html">policy page</a>. This will explain the
old and new rules and which projects each applies to.</p></li>
<li><p>Refactor the starter project in two commits:</p>
<ol class="arabic">
<li><p>Add or change the project’s .clang-tidy to reflect the agreed rules.
(This is in a separate commit to enable the merging process described in
<a class="reference internal" href="#minimising-cost-of-downstream-merges">Minimising cost of downstream merges</a>).
Also update the project list on the policy page.</p></li>
<li><p>Apply <code class="docutils literal notranslate"><span class="pre">clang-tidy</span></code> to the project’s files, with only the
<code class="docutils literal notranslate"><span class="pre">readability-identifier-naming</span></code> rules enabled. <code class="docutils literal notranslate"><span class="pre">clang-tidy</span></code> will also
reformat the affected lines according to the rules in <code class="docutils literal notranslate"><span class="pre">.clang-format</span></code>.
It is anticipated that this will be a good dog-fooding opportunity for
clang-tidy, and bugs should be fixed in the process, likely including:</p>
<blockquote>
<div><ul class="simple">
<li><p><a class="reference external" href="https://bugs.llvm.org/show_bug.cgi?id=41119">readability-identifier-naming incorrectly fixes lambda capture</a>.</p></li>
<li><p><a class="reference external" href="https://bugs.llvm.org/show_bug.cgi?id=41120">readability-identifier-naming incorrectly fixes variables which
become keywords</a>.</p></li>
<li><p><a class="reference external" href="https://bugs.llvm.org/show_bug.cgi?id=41122">readability-identifier-naming misses fixing member variables in
destructor</a>.</p></li>
</ul>
</div></blockquote>
</li>
</ol>
</li>
<li><p>Gather feedback and refine the process as appropriate.</p></li>
<li><p>Apply the process to the following projects, with a suitable delay between
each (at least 4 weeks after the first change, at least 2 weeks subsequently)
to allow gathering further feedback.
This list should exclude projects that must adhere to an externally defined
standard e.g. libcxx.
The list is roughly in chronological order of renaming.
Some items may not make sense to rename individually - it is expected that
this list will change following experimentation:</p>
<ul class="simple">
<li><p>TableGen</p></li>
<li><p>llvm/tools</p></li>
<li><p>clang-tools-extra</p></li>
<li><p>clang</p></li>
<li><p>ARM backend</p></li>
<li><p>AArch64 backend</p></li>
<li><p>AMDGPU backend</p></li>
<li><p>ARC backend</p></li>
<li><p>AVR backend</p></li>
<li><p>BPF backend</p></li>
<li><p>Hexagon backend</p></li>
<li><p>Lanai backend</p></li>
<li><p>MIPS backend</p></li>
<li><p>NVPTX backend</p></li>
<li><p>PowerPC backend</p></li>
<li><p>RISC-V backend</p></li>
<li><p>Sparc backend</p></li>
<li><p>SystemZ backend</p></li>
<li><p>WebAssembly backend</p></li>
<li><p>X86 backend</p></li>
<li><p>XCore backend</p></li>
<li><p>libLTO</p></li>
<li><p>Debug Information</p></li>
<li><p>Remainder of llvm</p></li>
<li><p>compiler-rt</p></li>
<li><p>libunwind</p></li>
<li><p>openmp</p></li>
<li><p>parallel-libs</p></li>
<li><p>polly</p></li>
<li><p>lldb</p></li>
</ul>
</li>
<li><p>Remove the old variable name rule from the policy page.</p></li>
<li><p>Repeat many of the steps in the sequence, using a script to expand acronyms.</p></li>
</ol>
</div>
<div class="section" id="references">
<h2><a class="toc-backref" href="#id90">References</a><a class="headerlink" href="#references" title="Permalink to this headline">¶</a></h2>
<dl class="citation">
<dt class="label" id="lldb"><span class="brackets">LLDB</span><span class="fn-backref">(<a href="#id2">1</a>,<a href="#id22">2</a>,<a href="#id46">3</a>)</span></dt>
<dd><p>LLDB Coding Conventions <a class="reference external" href="https://llvm.org/svn/llvm-project/lldb/branches/release_39/www/lldb-coding-conventions.html">https://llvm.org/svn/llvm-project/lldb/branches/release_39/www/lldb-coding-conventions.html</a></p>
</dd>
<dt class="label" id="google"><span class="brackets">Google</span><span class="fn-backref">(<a href="#id3">1</a>,<a href="#id23">2</a>,<a href="#id51">3</a>)</span></dt>
<dd><p>Google C++ Style Guide <a class="reference external" href="https://google.github.io/styleguide/cppguide.html#Variable_Names">https://google.github.io/styleguide/cppguide.html#Variable_Names</a></p>
</dd>
<dt class="label" id="webkit"><span class="brackets">WebKit</span><span class="fn-backref">(<a href="#id4">1</a>,<a href="#id19">2</a>,<a href="#id47">3</a>)</span></dt>
<dd><p>WebKit Code Style Guidelines <a class="reference external" href="https://webkit.org/code-style-guidelines/#names">https://webkit.org/code-style-guidelines/#names</a></p>
</dd>
<dt class="label" id="qt"><span class="brackets">Qt</span><span class="fn-backref">(<a href="#id5">1</a>,<a href="#id20">2</a>)</span></dt>
<dd><p>Qt Coding Style <a class="reference external" href="https://wiki.qt.io/Qt_Coding_Style#Declaring_variables">https://wiki.qt.io/Qt_Coding_Style#Declaring_variables</a></p>
</dd>
<dt class="label" id="rust"><span class="brackets">Rust</span><span class="fn-backref">(<a href="#id6">1</a>,<a href="#id24">2</a>)</span></dt>
<dd><p>Rust naming conventions <a class="reference external" href="https://doc.rust-lang.org/1.0.0/style/style/naming/README.html">https://doc.rust-lang.org/1.0.0/style/style/naming/README.html</a></p>
</dd>
<dt class="label" id="swift"><span class="brackets">Swift</span><span class="fn-backref">(<a href="#id7">1</a>,<a href="#id21">2</a>)</span></dt>
<dd><p>Swift API Design Guidelines <a class="reference external" href="https://swift.org/documentation/api-design-guidelines/#general-conventions">https://swift.org/documentation/api-design-guidelines/#general-conventions</a></p>
</dd>
<dt class="label" id="python"><span class="brackets">Python</span><span class="fn-backref">(<a href="#id8">1</a>,<a href="#id25">2</a>,<a href="#id52">3</a>)</span></dt>
<dd><p>Style Guide for Python Code <a class="reference external" href="https://www.python.org/dev/peps/pep-0008/#function-and-variable-names">https://www.python.org/dev/peps/pep-0008/#function-and-variable-names</a></p>
</dd>
<dt class="label" id="mozilla"><span class="brackets"><a class="fn-backref" href="#id50">Mozilla</a></span></dt>
<dd><p>Mozilla Coding style: Prefixes <a class="reference external" href="https://firefox-source-docs.mozilla.org/tools/lint/coding-style/coding_style_cpp.html#prefixes">https://firefox-source-docs.mozilla.org/tools/lint/coding-style/coding_style_cpp.html#prefixes</a></p>
</dd>
<dt class="label" id="sve"><span class="brackets"><a class="fn-backref" href="#id75">SVE</a></span></dt>
<dd><p>LLVM with support for SVE <a class="reference external" href="https://github.com/ARM-software/LLVM-SVE">https://github.com/ARM-software/LLVM-SVE</a></p>
</dd>
<dt class="label" id="aminiinconsistent"><span class="brackets"><a class="fn-backref" href="#id66">AminiInconsistent</a></span></dt>
<dd><p>Mehdi Amini, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130329.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130329.html</a></p>
</dd>
<dt class="label" id="arsenaultagree"><span class="brackets"><a class="fn-backref" href="#id10">ArsenaultAgree</a></span></dt>
<dd><p>Matt Arsenault, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/129934.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/129934.html</a></p>
</dd>
<dt class="label" id="beylsdistinguish"><span class="brackets"><a class="fn-backref" href="#id49">BeylsDistinguish</a></span></dt>
<dd><p>Kristof Beyls, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130292.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130292.html</a></p>
</dd>
<dt class="label" id="bradburyconcern"><span class="brackets">BradburyConcern</span><span class="fn-backref">(<a href="#id63">1</a>,<a href="#id65">2</a>)</span></dt>
<dd><p>Alex Bradbury, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130266.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130266.html</a></p>
</dd>
<dt class="label" id="bradburytransition"><span class="brackets"><a class="fn-backref" href="#id69">BradburyTransition</a></span></dt>
<dd><p>Alex Bradbury, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130388.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130388.html</a></p>
</dd>
<dt class="label" id="carruthacronym"><span class="brackets">CarruthAcronym</span><span class="fn-backref">(<a href="#id13">1</a>,<a href="#id54">2</a>,<a href="#id57">3</a>)</span></dt>
<dd><p>Chandler Carruth, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130313.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130313.html</a></p>
</dd>
<dt class="label" id="carruthcamelback"><span class="brackets">CarruthCamelBack</span><span class="fn-backref">(<a href="#id31">1</a>,<a href="#id34">2</a>)</span></dt>
<dd><p>Chandler Carruth, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130214.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130214.html</a></p>
</dd>
<dt class="label" id="carruthdistinguish"><span class="brackets"><a class="fn-backref" href="#id41">CarruthDistinguish</a></span></dt>
<dd><p>Chandler Carruth, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130310.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130310.html</a></p>
</dd>
<dt class="label" id="carruthfunction"><span class="brackets"><a class="fn-backref" href="#id27">CarruthFunction</a></span></dt>
<dd><p>Chandler Carruth, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130309.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130309.html</a></p>
</dd>
<dt class="label" id="carruthinconsistent"><span class="brackets"><a class="fn-backref" href="#id68">CarruthInconsistent</a></span></dt>
<dd><p>Chandler Carruth, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130312.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130312.html</a></p>
</dd>
<dt class="label" id="carruthlower"><span class="brackets"><a class="fn-backref" href="#id33">CarruthLower</a></span></dt>
<dd><p>Chandler Carruth, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130430.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130430.html</a></p>
</dd>
<dt class="label" id="dasinconsistent"><span class="brackets"><a class="fn-backref" href="#id67">DasInconsistent</a></span></dt>
<dd><p>Sanjoy Das, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130304.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130304.html</a></p>
</dd>
<dt class="label" id="denisovcamelback"><span class="brackets">DenisovCamelBack</span><span class="fn-backref">(<a href="#id18">1</a>,<a href="#id28">2</a>)</span></dt>
<dd><p>Alex Denisov, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130179.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130179.html</a></p>
</dd>
<dt class="label" id="emersonconcern"><span class="brackets"><a class="fn-backref" href="#id61">EmersonConcern</a></span></dt>
<dd><p>Amara Emerson, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/129894.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/129894.html</a></p>
</dd>
<dt class="label" id="greenedistinguish"><span class="brackets">GreeneDistinguish</span><span class="fn-backref">(<a href="#id44">1</a>,<a href="#id60">2</a>,<a href="#id71">3</a>)</span></dt>
<dd><p>David Greene, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130425.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130425.html</a></p>
</dd>
<dt class="label" id="greenegitblame"><span class="brackets"><a class="fn-backref" href="#id73">GreeneGitBlame</a></span></dt>
<dd><p>David Greene, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130228.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130228.html</a></p>
</dd>
<dt class="label" id="hendersonprefix"><span class="brackets"><a class="fn-backref" href="#id45">HendersonPrefix</a></span></dt>
<dd><p>James Henderson, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130465.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130465.html</a></p>
</dd>
<dt class="label" id="hahnledistinguish"><span class="brackets"><a class="fn-backref" href="#id43">HähnleDistinguish</a></span></dt>
<dd><p>Nicolai Hähnle, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/129923.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/129923.html</a></p>
</dd>
<dt class="label" id="ivanovicdistinguish"><span class="brackets">IvanovicDistinguish</span><span class="fn-backref">(<a href="#id30">1</a>,<a href="#id40">2</a>,<a href="#id48">3</a>)</span></dt>
<dd><p>Nemanja Ivanovic, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130249.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130249.html</a></p>
</dd>
<dt class="label" id="jonesdistinguish"><span class="brackets"><a class="fn-backref" href="#id39">JonesDistinguish</a></span></dt>
<dd><p>JD Jones, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/129926.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/129926.html</a></p>
</dd>
<dt class="label" id="lattneracronym"><span class="brackets"><a class="fn-backref" href="#id59">LattnerAcronym</a></span></dt>
<dd><p>Chris Lattner, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130353.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130353.html</a></p>
</dd>
<dt class="label" id="lattneragree"><span class="brackets"><a class="fn-backref" href="#id9">LattnerAgree</a></span></dt>
<dd><p>Chris Latter, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/129907.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/129907.html</a></p>
</dd>
<dt class="label" id="lattnerfunction"><span class="brackets">LattnerFunction</span><span class="fn-backref">(<a href="#id26">1</a>,<a href="#id29">2</a>)</span></dt>
<dd><p>Chris Lattner, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130630.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130630.html</a></p>
</dd>
<dt class="label" id="lattnerlower"><span class="brackets"><a class="fn-backref" href="#id36">LattnerLower</a></span></dt>
<dd><p>Chris Lattner, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130629.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130629.html</a></p>
</dd>
<dt class="label" id="lattnertransition"><span class="brackets"><a class="fn-backref" href="#id64">LattnerTransition</a></span></dt>
<dd><p>Chris Lattner, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130355.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130355.html</a></p>
</dd>
<dt class="label" id="malyutindistinguish"><span class="brackets">MalyutinDistinguish</span><span class="fn-backref">(<a href="#id12">1</a>,<a href="#id42">2</a>)</span></dt>
<dd><p>Danila Malyutin, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130320.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130320.html</a></p>
</dd>
<dt class="label" id="parzyszekacronym"><span class="brackets">ParzyszekAcronym</span><span class="fn-backref">(<a href="#id56">1</a>,<a href="#id58">2</a>)</span></dt>
<dd><p>Krzysztof Parzyszek, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130306.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130306.html</a></p>
</dd>
<dt class="label" id="parzyszekacronym2"><span class="brackets"><a class="fn-backref" href="#id15">ParzyszekAcronym2</a></span></dt>
<dd><p>Krzysztof Parzyszek, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130323.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130323.html</a></p>
</dd>
<dt class="label" id="parzyszekdistinguish"><span class="brackets"><a class="fn-backref" href="#id53">ParzyszekDistinguish</a></span></dt>
<dd><p>Krzysztof Parzyszek, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/129941.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/129941.html</a></p>
</dd>
<dt class="label" id="picusacronym"><span class="brackets">PicusAcronym</span><span class="fn-backref">(<a href="#id14">1</a>,<a href="#id55">2</a>)</span></dt>
<dd><p>Diana Picus, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130318.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130318.html</a></p>
</dd>
<dt class="label" id="reamesconcern"><span class="brackets"><a class="fn-backref" href="#id62">ReamesConcern</a></span></dt>
<dd><p>Philip Reames, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130181.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130181.html</a></p>
</dd>
<dt class="label" id="ricciacronyms"><span class="brackets">RicciAcronyms</span><span class="fn-backref">(<a href="#id16">1</a>,<a href="#id74">2</a>)</span></dt>
<dd><p>Bruno Ricci, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130328.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130328.html</a></p>
</dd>
<dt class="label" id="robinsonagree"><span class="brackets"><a class="fn-backref" href="#id11">RobinsonAgree</a></span></dt>
<dd><p>Paul Robinson, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130111.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130111.html</a></p>
</dd>
<dt class="label" id="robinsondistinguish"><span class="brackets"><a class="fn-backref" href="#id37">RobinsonDistinguish</a></span></dt>
<dd><p>Paul Robinson, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/129920.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/129920.html</a></p>
</dd>
<dt class="label" id="robinsondistinguish2"><span class="brackets"><a class="fn-backref" href="#id38">RobinsonDistinguish2</a></span></dt>
<dd><p>Paul Robinson, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130229.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130229.html</a></p>
</dd>
<dt class="label" id="robinsontransition"><span class="brackets"><a class="fn-backref" href="#id70">RobinsonTransition</a></span></dt>
<dd><p>Paul Robinson, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130415.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130415.html</a></p>
</dd>
<dt class="label" id="turnercamelback"><span class="brackets"><a class="fn-backref" href="#id32">TurnerCamelBack</a></span></dt>
<dd><p>Zachary Turner, <a class="reference external" href="https://reviews.llvm.org/D57896#1402264">https://reviews.llvm.org/D57896#1402264</a></p>
</dd>
<dt class="label" id="turnerlldb"><span class="brackets"><a class="fn-backref" href="#id35">TurnerLLDB</a></span></dt>
<dd><p>Zachary Turner, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130213.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130213.html</a></p>
</dd>
<dt class="label" id="ueyama"><span class="brackets"><a class="fn-backref" href="#id72">Ueyama</a></span></dt>
<dd><p>Rui Ueyama, <a class="reference external" href="http://lists.llvm.org/pipermail/llvm-dev/2019-February/130435.html">http://lists.llvm.org/pipermail/llvm-dev/2019-February/130435.html</a></p>
</dd>
</dl>
</div>
</div>
<div class="clearer"></div>
</div>
</div>
</div>
<div class="clearer"></div>
</div>
<div class="related" role="navigation" aria-label="related navigation">
<h3>Navigation</h3>
<ul>
<li class="right" style="margin-right: 10px">
<a href="../genindex.html" title="General Index"
>index</a></li>
<li class="right" >
<a href="VectorPredication.html" title="Vector Predication Roadmap"
>next</a> |</li>
<li class="right" >
<a href="TestSuite.html" title="Test-Suite Extensions"
>previous</a> |</li>
<li><a href="https://llvm.org/">LLVM Home</a> | </li>
<li><a href="../index.html">Documentation</a>»</li>
<li class="nav-item nav-item-1"><a href="../GettingInvolved.html" >Getting Involved</a> »</li>
<li class="nav-item nav-item-this"><a href="">Variable Names Plan</a></li>
</ul>
</div>
<div class="footer" role="contentinfo">
© Copyright 2003-2021, LLVM Project.
Last updated on 2021-09-18.
Created using <a href="https://www.sphinx-doc.org/">Sphinx</a> 3.5.4.
</div>
</body>
</html>
|
