Make updateLRRestored a static function

Author: ostannard

llvm/lib/Target/ARM/ARMFrameLowering.cpp

@@ -2781,7 +2781,7 @@ void ARMFrameLowering::determineCalleeSaves(MachineFunction &MF,
   AFI->setLRIsSpilled(SavedRegs.test(ARM::LR));
 }
 
-void ARMFrameLowering::updateLRRestored(MachineFunction &MF) const {
+void ARMFrameLowering::updateLRRestored(MachineFunction &MF) {
   MachineFrameInfo &MFI = MF.getFrameInfo();
   if (!MFI.isCalleeSavedInfoValid())
     return;

llvm/lib/Target/ARM/ARMFrameLowering.h

@@ -61,7 +61,7 @@ class ARMFrameLowering : public TargetFrameLowering {
 
   /// Update the IsRestored flag on LR if it is spilled, based on the return
   /// instructions.
-  void updateLRRestored(MachineFunction &MF) const;
+  static void updateLRRestored(MachineFunction &MF);
 
   void processFunctionBeforeFrameFinalized(
       MachineFunction &MF, RegScavenger *RS = nullptr) const override;

llvm/lib/Target/ARM/ARMLoadStoreOptimizer.cpp

@@ -2124,7 +2124,7 @@ bool ARMLoadStoreOpt::runOnMachineFunction(MachineFunction &Fn) {
   // the instruction(s) we changed, because there may be other BX returns which
   // still need LR to be restored.
   if (ModifiedLDMReturn)
-    Fn.getSubtarget<ARMSubtarget>().getFrameLowering()->updateLRRestored(Fn);
+    ARMFrameLowering::updateLRRestored(Fn);
 
   Allocator.DestroyAll();
   return Modified;