Add a note about GCC 3.3.2 optimization bug that causes llc to spin.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14250 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/docs/ReleaseNotes.html b/docs/ReleaseNotes.html
index 9d199c8b845fb1a9c603d5c4642811074fcc56b4..b160b6751ca222a0175576902776a817a61bd328 100644 (file)
--- a/docs/ReleaseNotes.html
+++ b/docs/ReleaseNotes.html
@@ -651,7 +651,13 @@ href="http://gcc.gnu.org/gcc-3.4/changes.html">GCC 3.4 release notes</a>.</li>
 <div class="doc_text">
 
 <ul>
-<li>None so far.
+  <li>Optimized (Release) versions of LLVM built with GCC 3.3.2 or 3.3.3 will 
+  produce an llc tool that always enters an infinite loop due to what 
+  appears to be an optimization bug (-O2 and -O3) in those versions of GCC. 
+  This problem does not happen in GCC 3.3.1 nor GCC 3.4.0 nor does it happen if
+  you build a Debug version of LLVM. You are cautioned not to use GCC 3.3.2 or 
+  GCC 3.3.3 to build Optimized versions of LLVM. It is unclear whether this problem 
+  affects other backends but it is unlikely.</li>
 </ul>
 
 </div>