Subzero: Remove IceString.

src/IceInst.cpp

 //===- subzero/src/IceInst.cpp - High-level instruction implementation ----===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 59 matching lines @@
     ICEINSTICMP_TABLE
 #undef X
 };
 
 } // end of anonymous namespace
 
 Inst::Inst(Cfg *Func, InstKind Kind, SizeT MaxSrcs, Variable *Dest)
     : Kind(Kind), Number(Func->newInstNumber()), Dest(Dest), MaxSrcs(MaxSrcs),
       Srcs(Func->allocateArrayOf<Operand *>(MaxSrcs)), LiveRangesEnded(0) {}
 
-IceString Inst::getInstName() const {
+const char *Inst::getInstName() const {
   if (!BuildDefs::dump())
     return "???";
 
   switch (Kind) {
 #define X(InstrKind, name)                                                     \
   case InstrKind:                                                              \
     return name
     X(Unreachable, "unreachable");
     X(Alloca, "alloca");
     X(Arithmetic, "arithmetic");
@@ skipping 174 matching lines @@
   addSource(ByteCount);
 }
 
 InstArithmetic::InstArithmetic(Cfg *Func, OpKind Op, Variable *Dest,
                                Operand *Source1, Operand *Source2)
     : InstHighLevel(Func, Inst::Arithmetic, 2, Dest), Op(Op) {
   addSource(Source1);
   addSource(Source2);
 }
 
-IceString InstArithmetic::getInstName() const {
+const char *InstArithmetic::getInstName() const {
   if (!BuildDefs::dump())
     return "???";
 
   return InstArithmeticAttributes[getOp()].DisplayString;
 }
 
 const char *InstArithmetic::getOpName(OpKind Op) {
   return Op < InstArithmetic::_num ? InstArithmeticAttributes[Op].DisplayString
                                    : "???";
 }
@@ skipping 725 matching lines @@
     // upper 32 bits of rax. We need to recognize and preserve these.
     return true;
   }
   if (!Dest->hasReg() && !SrcVar->hasReg() &&
       Dest->getStackOffset() == SrcVar->getStackOffset())
     return true;
   return false;
 }
 
 } // end of namespace Ice