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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/195859">195859</a></dd>
<dt>Author</dt> <dd>fpizlo@apple.com</dd>
<dt>Date</dt> <dd>2016-01-29 15:43:56 -0800 (Fri, 29 Jan 2016)</dd>
</dl>
<h3>Log Message</h3>
<pre>Clean up the B3 documentation a bit
https://bugs.webkit.org/show_bug.cgi?id=153678
Reviewed by Saam Barati.
* docs/b3/index.html: Fix some links and fix small issues.
* docs/b3/intermediate-representation.html: Clean up some text and fix small issues.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkWebsiteswebkitorgChangeLog">trunk/Websites/webkit.org/ChangeLog</a></li>
<li><a href="#trunkWebsiteswebkitorgdocsb3indexhtml">trunk/Websites/webkit.org/docs/b3/index.html</a></li>
<li><a href="#trunkWebsiteswebkitorgdocsb3intermediaterepresentationhtml">trunk/Websites/webkit.org/docs/b3/intermediate-representation.html</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkWebsiteswebkitorgChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Websites/webkit.org/ChangeLog (195858 => 195859)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Websites/webkit.org/ChangeLog 2016-01-29 23:42:43 UTC (rev 195858)
+++ trunk/Websites/webkit.org/ChangeLog 2016-01-29 23:43:56 UTC (rev 195859)
</span><span class="lines">@@ -1,5 +1,15 @@
</span><span class="cx"> 2016-01-29 Filip Pizlo <fpizlo@apple.com>
</span><span class="cx">
</span><ins>+ Clean up the B3 documentation a bit
+ https://bugs.webkit.org/show_bug.cgi?id=153678
+
+ Reviewed by Saam Barati.
+
+ * docs/b3/index.html: Fix some links and fix small issues.
+ * docs/b3/intermediate-representation.html: Clean up some text and fix small issues.
+
+2016-01-29 Filip Pizlo <fpizlo@apple.com>
+
</ins><span class="cx"> B3 should have documentation
</span><span class="cx"> https://bugs.webkit.org/show_bug.cgi?id=153658
</span><span class="cx">
</span></span></pre></div>
<a id="trunkWebsiteswebkitorgdocsb3indexhtml"></a>
<div class="modfile"><h4>Modified: trunk/Websites/webkit.org/docs/b3/index.html (195858 => 195859)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Websites/webkit.org/docs/b3/index.html 2016-01-29 23:42:43 UTC (rev 195858)
+++ trunk/Websites/webkit.org/docs/b3/index.html 2016-01-29 23:43:56 UTC (rev 195859)
</span><span class="lines">@@ -50,7 +50,8 @@
</span><span class="cx">
</span><span class="cx"> <h2>B3 IR</h2>
</span><span class="cx">
</span><del>- <p>Clients of B3 usually interact with it using B3 IR. It's C-like, in the sense that it
</del><ins>+ <p>Clients of B3 usually interact with it using
+ <a href="intermediate-representation.html">B3 IR</a>. It's C-like, in the sense that it
</ins><span class="cx"> models heap references as integers and does not attempt to verify memory accesses. It
</span><span class="cx"> enforces static single assignment, or SSA for short. An SSA program will contain only one
</span><span class="cx"> assignment to each variable, which makes it trivial to trace from a use of a variable to
</span><span class="lines">@@ -64,8 +65,8 @@
</span><span class="cx"> being generated and for callees of the procedure's callsites. B3 also makes it easy to
</span><span class="cx"> just emit a C call. There's an opcode for that.</p>
</span><span class="cx">
</span><del>- <p>See <a href="/documentation/b3/intermediate-representation.html">the IR documentation</a>
- for more info.</p>
</del><ins>+ <p>See <a href="intermediate-representation.html">the IR documentation</a> for more
+ info.</p>
</ins><span class="cx">
</span><span class="cx"> <p>Here's an example of the IR from the example above:</p>
</span><span class="cx">
</span><span class="lines">@@ -95,7 +96,8 @@
</span><span class="cx">
</span><span class="cx"> <h2>Air</h2>
</span><span class="cx">
</span><del>- <p>Air, or Assembly IR, is the way that B3 represents the machine instruction sequence prior
</del><ins>+ <p><a href="assembly-intermediate-representation.html">Air</a>, or Assembly IR, is the way
+ that B3 represents the machine instruction sequence prior
</ins><span class="cx"> to code generation. Air is like assembly, except that in addition to registers it has
</span><span class="cx"> temporaries, and in addition to the native address forms it has abstract ones like "stack"
</span><span class="cx"> (an abstract stack slot) and "callArg" (an abstract location in the outgoing call argument
</span></span></pre></div>
<a id="trunkWebsiteswebkitorgdocsb3intermediaterepresentationhtml"></a>
<div class="modfile"><h4>Modified: trunk/Websites/webkit.org/docs/b3/intermediate-representation.html (195858 => 195859)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Websites/webkit.org/docs/b3/intermediate-representation.html 2016-01-29 23:42:43 UTC (rev 195858)
+++ trunk/Websites/webkit.org/docs/b3/intermediate-representation.html 2016-01-29 23:43:56 UTC (rev 195859)
</span><span class="lines">@@ -60,9 +60,11 @@
</span><span class="cx">
</span><span class="cx"> <p>Variables, and the instructions that define them, are represented using the Value object.
</span><span class="cx"> The Value object has a return type, an opcode, and zero or more children. Children are
</span><del>- references to other Values. Values also have a unique 32-bit index that is used as the
- name. Those values are used as input to the instruction that computes this value. For
- example:</p>
</del><ins>+ references to other Values. Those values are used as input to the instruction that
+ computes this value.</p>
+ <p>Values also have a unique 32-bit index that is used as the name.</p>
+
+ <p>Example:</p>
</ins><span class="cx">
</span><span class="cx"> <pre><code>Int32 @3 = Add(@1, @2)</code></pre>
</span><span class="cx">
</span></span></pre>
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