[CostModel] fill in arguments as part of intrinsic attribute constructor

This appears to be an error of code duplication - instead of
one constructor variant calling another, we have N similar
but not identical versions.

I think this is 'NFC' based on the current callers, but it's
hard to tell or guess the intent in all cases.

Author: rotateright

llvm/lib/Analysis/TargetTransformInfo.cpp

@@ -71,6 +71,7 @@ IntrinsicCostAttributes::IntrinsicCostAttributes(Intrinsic::ID Id,
   if (const auto *FPMO = dyn_cast<FPMathOperator>(&CI))
     FMF = FPMO->getFastMathFlags();
 
+  Arguments.insert(Arguments.begin(), CI.arg_begin(), CI.arg_end());
   FunctionType *FTy =
     CI.getCalledFunction()->getFunctionType();
   ParamTys.insert(ParamTys.begin(), FTy->param_begin(), FTy->param_end());