fixup! [ARM] Refactor generation of push/pop instructions (NFC)

Use llvm::function_ref

Author: ostannard

llvm/lib/Target/ARM/ARMFrameLowering.cpp

@@ -1561,7 +1561,7 @@ void ARMFrameLowering::emitPushInst(MachineBasicBlock &MBB,
                                     ArrayRef<CalleeSavedInfo> CSI,
                                     unsigned StmOpc, unsigned StrOpc,
                                     bool NoGap,
-                                    std::function<bool(unsigned)> Func) const {
+                                    function_ref<bool(unsigned)> Func) const {
   MachineFunction &MF = *MBB.getParent();
   const TargetInstrInfo &TII = *MF.getSubtarget().getInstrInfo();
   const TargetRegisterInfo &TRI = *STI.getRegisterInfo();
@@ -1634,7 +1634,7 @@ void ARMFrameLowering::emitPopInst(MachineBasicBlock &MBB,
                                    MutableArrayRef<CalleeSavedInfo> CSI,
                                    unsigned LdmOpc, unsigned LdrOpc,
                                    bool isVarArg, bool NoGap,
-                                   std::function<bool(unsigned)> Func) const {
+                                   function_ref<bool(unsigned)> Func) const {
   MachineFunction &MF = *MBB.getParent();
   const TargetInstrInfo &TII = *MF.getSubtarget().getInstrInfo();
   const TargetRegisterInfo &TRI = *STI.getRegisterInfo();

llvm/lib/Target/ARM/ARMFrameLowering.h

@@ -91,11 +91,11 @@ class ARMFrameLowering : public TargetFrameLowering {
   void emitPushInst(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
                     ArrayRef<CalleeSavedInfo> CSI, unsigned StmOpc,
                     unsigned StrOpc, bool NoGap,
-                    std::function<bool(unsigned)> Func) const;
+                    function_ref<bool(unsigned)> Func) const;
   void emitPopInst(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
                    MutableArrayRef<CalleeSavedInfo> CSI, unsigned LdmOpc,
                    unsigned LdrOpc, bool isVarArg, bool NoGap,
-                   std::function<bool(unsigned)> Func) const;
+                   function_ref<bool(unsigned)> Func) const;
 
   MachineBasicBlock::iterator
   eliminateCallFramePseudoInstr(MachineFunction &MF,