Remove using LLVM tools to check correctness of cast operation.

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.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file implements the Inst class, primarily the various
@@ skipping 600 matching lines @@
   Str << "(";
   for (SizeT I = 0; I < getNumArgs(); ++I) {
     if (I > 0)
       Str << ", ";
     Str << getArg(I)->getType() << " ";
     getArg(I)->dump(Func);
   }
   Str << ")";
 }
 
+const char *InstCast::getCastName(InstCast::OpKind Kind) {
+  size_t Index = static_cast<size_t>(Kind);
+  if (Index < InstCast::OpKind::_num)
+    return InstCastAttributes[Index].DisplayString;
+  llvm_unreachable("Invalid InstCast::OpKind");
+  return "???";
+}
+
 void InstCast::dump(const Cfg *Func) const {
   if (!ALLOW_DUMP)
     return;
   Ostream &Str = Func->getContext()->getStrDump();
   dumpDest(Func);
-  Str << " = " << InstCastAttributes[getCastKind()].DisplayString << " "
-      << getSrc(0)->getType() << " ";
+  Str << " = " << getCastName(getCastKind()) << " " << getSrc(0)->getType()
+      << " ";
   dumpSources(Func);
   Str << " to " << getDest()->getType();
 }
 
 void InstIcmp::dump(const Cfg *Func) const {
   if (!ALLOW_DUMP)
     return;
   Ostream &Str = Func->getContext()->getStrDump();
   dumpDest(Func);
   Str << " = icmp " << InstIcmpAttributes[getCondition()].DisplayString << " "
@@ skipping 172 matching lines @@
 
 void InstTarget::dump(const Cfg *Func) const {
   if (!ALLOW_DUMP)
     return;
   Ostream &Str = Func->getContext()->getStrDump();
   Str << "[TARGET] ";
   Inst::dump(Func);
 }
 
 } // end of namespace Ice