diff --git a/lib/Target/PowerPC/PPCInstrInfo.td b/lib/Target/PowerPC/PPCInstrInfo.td
index aec1385aaf5..52d9d6691f2 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.td
+++ b/lib/Target/PowerPC/PPCInstrInfo.td
@@ -2010,6 +2010,15 @@ def MCRF   : XLForm_3<19, 0, (outs crrc:$BF), (ins crrc:$BFA),
                       "mcrf $BF, $BFA", IIC_BrMCR>,
              PPC970_DGroup_First, PPC970_Unit_CRU;
 
+// FIXME: According to the ISA (section 2.5.1 of version 2.06), the
+// condition-register logical instructions have preferred forms. Specifically,
+// it is preferred that the bit specified by the BT field be in the same
+// condition register as that specified by the bit BB. We might want to account
+// for this via hinting the register allocator and anti-dep breakers, or we
+// could constrain the register class to force this constraint and then loosen
+// it during register allocation via convertToThreeAddress or some similar
+// mechanism.
+
 let isCommutable = 1 in {
 def CRAND  : XLForm_1<19, 257, (outs crbitrc:$CRD),
                                (ins crbitrc:$CRA, crbitrc:$CRB),
diff --git a/lib/Target/PowerPC/README.txt b/lib/Target/PowerPC/README.txt
index 3942a7cdac2..4132b045e5a 100644
--- a/lib/Target/PowerPC/README.txt
+++ b/lib/Target/PowerPC/README.txt
@@ -203,20 +203,6 @@ _foo:
 
 ===-------------------------------------------------------------------------===
 
-On the G5, logical CR operations are more expensive in their three
-address form: ops that read/write the same register are half as expensive as
-those that read from two registers that are different from their destination.
-
-We should model this with two separate instructions.  The isel should generate
-the "two address" form of the instructions.  When the register allocator 
-detects that it needs to insert a copy due to the two-addresness of the CR
-logical op, it will invoke PPCInstrInfo::convertToThreeAddress.  At this point
-we can convert to the "three address" instruction, to save code space.
-
-This only matters when we start generating cr logical ops.
-
-===-------------------------------------------------------------------------===
-
 We should compile these two functions to the same thing:
 
 #include <stdlib.h>