Subzero: Improve non-MINIMAL string performance.

src/IceOperand.cpp

 //===- subzero/src/IceOperand.cpp - High-level operand implementation -----===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 173 matching lines @@
       return true;
   }
   return false;
 }
 
 void LiveRange::trim(InstNumberT Lower) {
   while (TrimmedBegin != Range.end() && TrimmedBegin->second <= Lower)
     ++TrimmedBegin;
 }
 
-std::string Variable::getName(const Cfg *Func) const {
-  if (Func == nullptr)
-    return "__" + std::to_string(getIndex());
-  return Name.toString();
-}
-
 const Variable *Variable::asType(const Cfg *Func, Type Ty,
                                  RegNumT NewRegNum) const {
   // Note: This returns a Variable, even if the "this" object is a subclass of
   // Variable.
   if (!BuildDefs::dump() || getType() == Ty)
     return this;
   static constexpr SizeT One = 1;
   Variable *V = new (CfgLocalAllocator<Variable>().allocate(One))
       Variable(Func, kVariable, Ty, Number);
   V->Name = Name;
@@ skipping 322 matching lines @@
 
 void Variable::emit(const Cfg *Func) const {
   if (BuildDefs::dump())
     Func->getTarget()->emitVariable(this);
 }
 
 void Variable::dump(const Cfg *Func, Ostream &Str) const {
   if (!BuildDefs::dump())
     return;
   if (Func == nullptr) {
-    Str << "%" << getName(Func);
+    Str << "%" << getName();
     return;
   }
   if (Func->isVerbose(IceV_RegOrigins) ||
       (!hasReg() && !Func->getTarget()->hasComputedFrame()))
-    Str << "%" << getName(Func);
+    Str << "%" << getName();
   if (hasReg()) {
     if (Func->isVerbose(IceV_RegOrigins))
       Str << ":";
     Str << Func->getTarget()->getRegName(RegNum, getType());
   } else if (Func->getTarget()->hasComputedFrame()) {
     if (Func->isVerbose(IceV_RegOrigins))
       Str << ":";
     const auto BaseRegisterNumber =
         hasReg() ? getBaseRegNum() : Func->getTarget()->getFrameOrStackReg();
     Str << "["
@@ skipping 91 matching lines @@
   if (getType() != IceType_i32 && getType() != IceType_i16 &&
       getType() != IceType_i8)
     return false;
   // The Following checks if the signed representation of Value is between
   // -Threshold/2 and +Threshold/2
   bool largerThanThreshold = Threshold / 2 + Value >= Threshold;
   return largerThanThreshold;
 }
 
 } // end of namespace Ice