Subzero: Completely remove tracking of stack pointer live range.

src/IceOperand.h

 //===- subzero/src/IceOperand.h - High-level operands -----------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 445 matching lines @@
 
   RegWeight getWeight() const { return Weight; }
   void setWeight(uint32_t NewWeight) { Weight = RegWeight(NewWeight); }
   void setWeightInfinite() { setWeight(RegWeight::Inf); }
 
   LiveRange &getLiveRange() { return Live; }
   const LiveRange &getLiveRange() const { return Live; }
   void setLiveRange(const LiveRange &Range) { Live = Range; }
   void resetLiveRange() { Live.reset(); }
   void addLiveRange(InstNumberT Start, InstNumberT End, uint32_t WeightDelta) {
+    assert(!getIgnoreLiveness());
     assert(WeightDelta != RegWeight::Inf);
     Live.addSegment(Start, End);
     if (Weight.isInf())
       Live.setWeight(RegWeight(RegWeight::Inf));
     else
       Live.addWeight(WeightDelta * Weight.getWeight());
   }
   void setLiveRangeInfiniteWeight() {
     Live.setWeight(RegWeight(RegWeight::Inf));
   }
@@ skipping 179 matching lines @@
 private:
   const Cfg *Func;
   MetadataKind Kind;
   std::vector<VariableTracking> Metadata;
   const static InstDefList NoDefinitions;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEOPERAND_H