[VP] Fix unit test failures caused by llvm#90502

Forgot to add vp.cttz.elts into the unittest. Also, I didn't specify the
positions of overloaded type parameters.

Author: mshockwave

llvm/lib/IR/IntrinsicInst.cpp

@@ -677,6 +677,7 @@ Function *VPIntrinsic::getDeclarationForParams(Module *M, Intrinsic::ID VPID,
   case Intrinsic::vp_inttoptr:
   case Intrinsic::vp_lrint:
   case Intrinsic::vp_llrint:
+  case Intrinsic::vp_cttz_elts:
     VPFunc =
         Intrinsic::getDeclaration(M, VPID, {ReturnType, Params[0]->getType()});
     break;

llvm/unittests/IR/VPIntrinsicTest.cpp

@@ -179,6 +179,8 @@ class VPIntrinsicTest : public testing::Test {
         << "(<8 x i16>, <8 x i16>, <8 x i16>, <8 x i1>, i32) ";
     Str << " declare <8 x i16> @llvm.vp.fshr.v8i16"
         << "(<8 x i16>, <8 x i16>, <8 x i16>, <8 x i1>, i32) ";
+    Str << " declare i32 @llvm.vp.cttz.elts.i32.v8i16"
+        << "(<8 x i16>, i1 immarg, <8 x i1>, i32) ";
 
     return parseAssemblyString(Str.str(), Err, C);
   }