dont support fastisel

Author: oscardssmith

llvm/lib/CodeGen/IntrinsicLowering.cpp

@@ -199,25 +199,6 @@ static Value *LowerCTLZ(LLVMContext &Context, Value *V, Instruction *IP) {
   return LowerCTPOP(Context, V, IP);
 }
 
-/// Emit the code to lower clmul of V1, V2 before the specified instruction IP.
-static Value *LowerCLMUL(LLVMContext &Context, Value *V1, Value *V2, Instruction *IP) {
-
-  IRBuilder<> Builder(IP);
-
-  unsigned BitSize = V1->getType()->getScalarSizeInBits();
-  Value *Res = ConstantInt::get(V1->getType(), 0);
-  Value *Zero = ConstantInt::get(V1->getType(), 0);
-  Value *One = ConstantInt::get(V1->getType(), 1);
-  for (unsigned I = 1; I < BitSize; I++) {
-    Value *LowBit = Builder.CreateAnd(V1, One, "clmul.isodd");
-    Value *Pred = Builder.CreateSelect(LowBit, V2, Zero, "clmul.V2_or_zero");
-    Res = Builder.CreateXor(Res, Pred, "clmul.Res");
-    V1 = Builder.CreateLShr(V1, One, "clmul.V1");
-    V2 = Builder.CreateShl(V2, One, "clmul.V2");
-  }
-  return Res;
-}
-
 static void ReplaceFPIntrinsicWithCall(CallInst *CI, const char *Fname,
                                        const char *Dname,
                                        const char *LDname) {
@@ -281,10 +262,6 @@ void IntrinsicLowering::LowerIntrinsicCall(CallInst *CI) {
     CI->replaceAllUsesWith(LowerCTLZ(Context, CI->getArgOperand(0), CI));
     break;
 
-  case Intrinsic::clmul:
-    CI->replaceAllUsesWith(LowerCLMUL(Context, CI->getArgOperand(0), CI->getArgOperand(1), CI));
-    break;
-
   case Intrinsic::cttz: {
     // cttz(x) -> ctpop(~X & (X-1))
     Value *Src = CI->getArgOperand(0);