LiveRangeEdit: Inline markDeadRemat() into only user; NFC

This function was only called from a single place in which we didn't
even need the `if (DeadRemats)` check.

llvm-svn: 322230

Author: MatzeB

llvm/include/llvm/CodeGen/LiveRangeEdit.h

@@ -233,12 +233,6 @@ class LiveRangeEdit : private MachineRegisterInfo::Delegate {
     return Rematted.count(ParentVNI);
   }
 
-  void markDeadRemat(MachineInstr *inst) {
-    // DeadRemats is an optional field.
-    if (DeadRemats)
-      DeadRemats->insert(inst);
-  }
-
   /// eraseVirtReg - Notify the delegate that Reg is no longer in use, and try
   /// to erase it from LIS.
   void eraseVirtReg(unsigned Reg);

llvm/lib/CodeGen/LiveRangeEdit.cpp

@@ -364,7 +364,7 @@ void LiveRangeEdit::eliminateDeadDef(MachineInstr *MI, ToShrinkSet &ToShrink,
       VNInfo *VNI = NewLI.getNextValue(Idx, LIS.getVNInfoAllocator());
       NewLI.addSegment(LiveInterval::Segment(Idx, Idx.getDeadSlot(), VNI));
       pop_back();
-      markDeadRemat(MI);
+      DeadRemats->insert(MI);
       const TargetRegisterInfo &TRI = *MRI.getTargetRegisterInfo();
       MI->substituteRegister(Dest, NewLI.reg, 0, TRI);
       MI->getOperand(0).setIsDead(true);