Temporarily revert 124765 in an attempt to find the cycle breaking bootstrap.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124778 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/LiveRangeEdit.h

@@ -78,7 +78,6 @@ public:
   iterator begin() const { return newRegs_.begin()+firstNew_; }
   iterator end() const { return newRegs_.end(); }
   unsigned size() const { return newRegs_.size()-firstNew_; }
-  bool empty() const { return size() == 0; }
   LiveInterval *get(unsigned idx) const { return newRegs_[idx+firstNew_]; }
 
   /// create - Create a new register with the same class and stack slot as