Expose hasLiveCondCodeDef as a member function of the X86InstrInfo class. NFC

[kbsmith1]

Summary

This takes the existing static function hasLiveCondCodeDef and makes it a member function of the X86InstrInfo class. This is a useful utility function that an upcoming change would like to use. NFC.

[kbsmith1]

FYI, Nadav Rotem LGTM'd this in email, but that didn't seem to hit the llvm-commits list.

llvm/trunk/lib/Target/X86/X86InstrInfo.h

public:
 
   /// isSafeToClobberEFLAGS - Return true if it's safe insert an instruction tha
   /// would clobber the EFLAGS condition register. Note the result may be
   /// conservative. If it cannot definitely determine the safety after visiting
   /// a few instructions in each direction it assumes it's not safe.
   bool isSafeToClobberEFLAGS(MachineBasicBlock &MBB,
                              MachineBasicBlock::iterator I) const;
 
+  /// True if MI has a condition code def, e.g. EFLAGS, that is
+  /// not marked dead.
+  bool hasLiveCondCodeDef(MachineInstr *MI) const;
+
   static bool isX86_64ExtendedReg(const MachineOperand &MO) {
     if (!MO.isReg()) return false;
     return X86II::isX86_64ExtendedReg(MO.getReg());
   }
 
   /// getGlobalBaseReg - Return a virtual register initialized with the
   /// the global base register value. Output instructions required to
   /// initialize the register in the function entry block, if necessary.

llvm/trunk/lib/Target/X86/X86InstrInfo.cpp

if (Opc == X86::MOV32r0 && !isSafeToClobberEFLAGS(MBB, I)) {
     MBB.insert(I, MI);
   }
 
   MachineInstr *NewMI = std::prev(I);
   NewMI->substituteRegister(Orig->getOperand(0).getReg(), DestReg, SubIdx, TRI);
 }
 
 /// True if MI has a condition code def, e.g. EFLAGS, that is not marked dead.
-static bool hasLiveCondCodeDef(MachineInstr *MI) {
+bool X86InstrInfo::hasLiveCondCodeDef(MachineInstr *MI) const {
   for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
     MachineOperand &MO = MI->getOperand(i);
     if (MO.isReg() && MO.isDef() &&
         MO.getReg() == X86::EFLAGS && !MO.isDead()) {
       return true;
     }
   }
   return false;