As requested, a blurb on sub-targets.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23769 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/CodeGenerator.html b/docs/CodeGenerator.html
index 39eecc1..0e63fac 100644
--- a/docs/CodeGenerator.html
+++ b/docs/CodeGenerator.html
@@ -444,7 +444,11 @@
<div class="doc_text">
<p>
- TODO
+ <p>The <tt>TargetSubtarget</tt> class is used to provide information about the
+ specific chip set being targeted. A sub-target informs code generation of
+ which instructions are supported, instruction latencies and instruction
+ execution itinerary; i.e., which processing units are used, in what order, and
+ for how long.
</p>
</div>