Explain what ExeDepsFix does.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145253 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/ReleaseNotes.html b/docs/ReleaseNotes.html
index e3b3bae..435bd93 100644
--- a/docs/ReleaseNotes.html
+++ b/docs/ReleaseNotes.html
@@ -942,9 +942,12 @@
comparisons, turning them into various optimized code sequences (e.g.
using the SSE4/AVX "blend" instructions).</li>
<li>The SSE execution domain fix pass and the ARM NEON move fix pass have been
- merged to a target independent execution dependency fix pass. Targets can
- override the <code>getExecutionDomain</code> and
- <code>setExecutionDomain</code> hooks to use it.</li>
+ merged to a target independent execution dependency fix pass. This pass is
+ used to select alternative equivalent opcodes in a way that minimizes
+ execution domain crossings. Closely connected instructions are moved to
+ the same execution domain when possible. Targets can override the
+ <code>getExecutionDomain</code> and <code>setExecutionDomain</code> hooks
+ to use the pass.</li>
</ul>
</div>