add a note so I can remember the common t-t's


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22386 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/CodeGenerator.html b/docs/CodeGenerator.html
index b604810..700a4fc 100644
--- a/docs/CodeGenerator.html
+++ b/docs/CodeGenerator.html
@@ -934,6 +934,28 @@
 
 <!-- _______________________________________________________________________ -->
 <div class="doc_subsubsection">
+  <a name="x86_tt">X86 Target Triples Supported</a>
+</div>
+
+<div class="doc_text">
+<p>
+The following are the known target triples that are supported by the X86 
+backend.  This is not an exhaustive list, but it would be useful to add those
+that people test.
+</p>
+
+<ul>
+<li><b>i686-pc-linux-gnu</b> - Linux</li>
+<li><b>i386-unknown-freebsd5.3</b> - FreeBSD 5.3</li>
+<li><b>i686-pc-cygwin</b> - Cygwin on Win32</li>
+<li><b>i686-pc-mingw32</b> - MingW on Win32</li>
+<li><b>i686-apple-darwin*</b> - Apple Darwin</li>
+</ul>
+
+</div>
+
+<!-- _______________________________________________________________________ -->
+<div class="doc_subsubsection">
   <a name="x86_memory">Representing X86 addressing modes in MachineInstrs</a>
 </div>