Add entry to CREDITS.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37521 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CREDITS.TXT b/CREDITS.TXT
index d728408..34768fe 100644
--- a/CREDITS.TXT
+++ b/CREDITS.TXT
@@ -95,6 +95,11 @@
 E: djg@cray.com
 D: Miscellaneous bug fixes
 
+N: David Greene
+E: greened@obbligato.org
+D: Miscellaneous bug fixes
+D: Register allocation refactoring
+
 N: Paolo Invernizzi
 E: arathorn@fastwebnet.it
 D: Visual C++ compatibility fixes