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authorChris Lattner <sabre@nondot.org>2004-05-25 17:44:58 +0000
committerChris Lattner <sabre@nondot.org>2004-05-25 17:44:58 +0000
commit8dabb50287ce0064be87d0c38f773d982e889773 (patch)
tree4f6a080ac33427f167dcdb18897a5102872f9791 /docs
parent94f2df295d8ac3589a9c753ebc5f5a25bd42f26b (diff)
Make use of the doc_author and doc_code styles. <tt>'ify llvm names. Minor
other edits git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13760 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs')
-rw-r--r--docs/BytecodeFormat.html26
1 files changed, 14 insertions, 12 deletions
diff --git a/docs/BytecodeFormat.html b/docs/BytecodeFormat.html
index d77653be0a..9902ecdf5e 100644
--- a/docs/BytecodeFormat.html
+++ b/docs/BytecodeFormat.html
@@ -38,10 +38,9 @@
</ol>
</li>
</ol>
-<div class="doc_text">
-<p><b>Written by <a href="mailto:rspencer@x10sys.com">Reid Spencer</a>
-and <a href="mailto:sabre@nondot.org">Chris Lattner</a></b></p>
-<p> </p>
+<div class="doc_author">
+<p>Written by <a href="mailto:rspencer@x10sys.com">Reid Spencer</a>
+</p>
</div>
<!-- *********************************************************************** -->
<div class="doc_section"> <a name="abstract">Abstract </a></div>
@@ -128,13 +127,16 @@ Values. Since the bytecode file is a <em>direct</em> representation of LLVM's
intermediate representation, there is a need to represent pointers in the file.
Slots are used for this purpose. For example, if one has the following assembly:
</p>
-<pre><code>
- %MyType = type { int, sbyte };
- %MyVar = external global %MyType ;
-</code></pre>
-<p>there are two definitions. The definition of %MyVar uses %MyType and %MyType
-is used by %MyVar. In the C++ IR this linkage between %MyVar and %MyType is
-made explicitly by the use of C++ pointers. In bytecode, however, there's no
+
+<div class="doc_code">
+ %MyType = type { int, sbyte }<br>
+ %MyVar = external global %MyType
+</div>
+
+<p>there are two definitions. The definition of <tt>%MyVar</tt> uses
+<tt>%MyType</tt>. In the C++ IR this linkage between <tt>%MyVar</tt> and
+<tt>%MyType</tt> is
+explicit through the use of C++ pointers. In bytecode, however, there's no
ability to store memory addresses. Instead, we compute and write out slot
numbers for every type and Value written to the file.</p>
<p>A slot number is simply an unsigned 32-bit integer encoded in the variable
@@ -146,7 +148,7 @@ written to the bytecode file in a list (sequentially). Their order in that list
determines their slot number. This means that slot #1 doesn't mean anything
unless you also specify for which type you want slot #1. Types are handled
specially and are always written to the file first (in the Global Type Pool) and
-in such a way that both forward and backward references of the types can be
+in such a way that both forward and backward references of the types can often be
resolved with a single pass through the type pool. </p>
<p>Slot numbers are also kept small by rearranging their order. Because of the
structure of LLVM, certain values are much more likely to be used frequently