Update to-do list


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17235 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/README.txt b/lib/Target/PowerPC/README.txt
index 3b9df31..0e45959 100644
--- a/lib/Target/PowerPC/README.txt
+++ b/lib/Target/PowerPC/README.txt
@@ -1,7 +1,8 @@
 TODO:
 * implement not-R0 register GPR class
-* fix rlwimi generation to be use-and-def
 * implement scheduling info
+* implement do-loop pass
+* implement do-loop -> bdnz transform
 * implement powerpc-64 for darwin
 * implement powerpc-64 for aix
 * use stfiwx in float->int