CSE of a NonValueInstruction is a no-op, remove handling cond_fail

Author: meg-gupta

lib/SILOptimizer/Transforms/CSE.cpp

@@ -235,10 +235,6 @@ class HashVisitor : public SILInstructionVisitor<HashVisitor, llvm::hash_code> {
                               lookThroughOwnershipInsts(X->getOperand()));
   }
 
-  hash_code visitCondFailInst(CondFailInst *X) {
-    return llvm::hash_combine(X->getKind(), X->getOperand());
-  }
-
   hash_code visitClassMethodInst(ClassMethodInst *X) {
     return llvm::hash_combine(X->getKind(), X->getType(),
                               lookThroughOwnershipInsts(X->getOperand()));
@@ -1130,7 +1126,6 @@ bool CSE::canHandle(SILInstruction *Inst) {
   case SILInstructionKind::IndexAddrInst:
   case SILInstructionKind::PointerToAddressInst:
   case SILInstructionKind::AddressToPointerInst:
-  case SILInstructionKind::CondFailInst:
   case SILInstructionKind::EnumInst:
   case SILInstructionKind::UncheckedEnumDataInst:
   case SILInstructionKind::UncheckedTrivialBitCastInst: