Drop PhysRegInputs from InstructionMatcher as no users anymore

Author: e-kud

llvm/utils/TableGen/Common/GlobalISel/GlobalISelMatchTable.cpp

@@ -1723,7 +1723,6 @@ OperandMatcher &InstructionMatcher::addPhysRegInput(const Record *Reg,
   OperandMatcher *OM = new OperandMatcher(*this, OpIdx, "", TempOpIdx);
   Operands.emplace_back(OM);
   Rule.definePhysRegOperand(Reg, *OM);
-  PhysRegInputs.emplace_back(Reg, OpIdx);
   return *OM;
 }
 

llvm/utils/TableGen/Common/GlobalISel/GlobalISelMatchTable.h

@@ -1763,11 +1763,6 @@ class InstructionMatcher final : public PredicateListMatcher<PredicateMatcher> {
   unsigned InsnVarID;
   bool AllowNumOpsCheck;
 
-  /// PhysRegInputs - List list has an entry for each explicitly specified
-  /// physreg input to the pattern.  The first elt is the Register node, the
-  /// second is the recorded slot number the input pattern match saved it in.
-  SmallVector<std::pair<const Record *, unsigned>, 2> PhysRegInputs;
-
   bool canAddNumOperandsCheck() const {
     // Add if it's allowed, and:
     //    - We don't have a variadic operand