Add a stub for block placement pass. This needs fleshing out w/ details
about what folks should expect w.r.t. the new algorithm.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154891 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/ReleaseNotes.html b/docs/ReleaseNotes.html
index c2bd881..22ceb74 100644
--- a/docs/ReleaseNotes.html
+++ b/docs/ReleaseNotes.html
@@ -299,6 +299,8 @@
Support to model instruction bundling / packing.</li>
<li><a href="#armintegratedassembler">ARM Integrated Assembler</a>,
A full featured assembler and direct-to-object support for ARM.</li>
+ <li><a href="#blockplacement">Basic Block Placement</a>
+ Probability driven basic block placement.</li>
<li>....</li>
</ul>
@@ -416,6 +418,16 @@
</div>
+<h4>
+<a name="blockplacement">Basic Block Placement</a>
+</h4>
+<div>
+<p>A probability based block placement and code layout algorithm was added to
+LLVM's code generator. This layout pass supports probabilities derived from
+static heuristics as well as source code annotations such as
+<code>__builtin_expect</code>.</p>
+</div>
+
<!--=========================================================================-->
<h3>
<a name="x86">X86-32 and X86-64 Target Improvements</a>