Index: lib/Target/PowerPC/PPCInstr64Bit.td
===================================================================
--- lib/Target/PowerPC/PPCInstr64Bit.td
+++ lib/Target/PowerPC/PPCInstr64Bit.td
@@ -299,6 +299,7 @@
 // 64-bit CR instructions
 let Interpretation64Bit = 1, isCodeGenOnly = 1 in {
 let hasSideEffects = 0 in {
+let hasExtraDefRegAllocReq = 1 in // to enable post-ra anti-dep breaking.
 def MTOCRF8: XFXForm_5a<31, 144, (outs crbitm:$FXM), (ins g8rc:$ST),
                         "mtocrf $FXM, $ST", IIC_BrMCRX>,
             PPC970_DGroup_First, PPC970_Unit_CRU;
Index: lib/Target/PowerPC/PPCInstrInfo.td
===================================================================
--- lib/Target/PowerPC/PPCInstrInfo.td
+++ lib/Target/PowerPC/PPCInstrInfo.td
@@ -2299,6 +2299,7 @@
                      "#RESTORE_VRSAVE", []>;
 
 let hasSideEffects = 0 in {
+let hasExtraDefRegAllocReq = 1 in // to enable post-ra anti-dep breaking.
 def MTOCRF: XFXForm_5a<31, 144, (outs crbitm:$FXM), (ins gprc:$ST),
                        "mtocrf $FXM, $ST", IIC_BrMCRX>,
             PPC970_DGroup_First, PPC970_Unit_CRU;