It's not always safe to fold movsd into xorpd, etc. Check the alignment of the load address first to make sure it's 16 byte aligned.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46893 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/PowerPC/PPCInstrInfo.cpp

@@ -536,7 +536,8 @@ void PPCInstrInfo::loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
 
 /// foldMemoryOperand - PowerPC (like most RISC's) can only fold spills into
 /// copy instructions, turning them into load/store instructions.
-MachineInstr *PPCInstrInfo::foldMemoryOperand(MachineInstr *MI,
+MachineInstr *PPCInstrInfo::foldMemoryOperand(MachineFunction &MF,
+                                              MachineInstr *MI,
                                               SmallVectorImpl<unsigned> &Ops,
                                               int FrameIndex) const {
   if (Ops.size() != 1) return NULL;
@@ -594,7 +595,7 @@ MachineInstr *PPCInstrInfo::foldMemoryOperand(MachineInstr *MI,
 }
 
 bool PPCInstrInfo::canFoldMemoryOperand(MachineInstr *MI,
-                                         SmallVectorImpl<unsigned> &Ops) const {
+                                        SmallVectorImpl<unsigned> &Ops) const {
   if (Ops.size() != 1) return false;
 
   // Make sure this is a reg-reg copy.  Note that we can't handle MCRF, because