diff --git a/clang/test/CodeGen/aarch64-v8.2a-neon-intrinsics.c b/clang/test/CodeGen/aarch64-v8.2a-neon-intrinsics.c
--- a/clang/test/CodeGen/aarch64-v8.2a-neon-intrinsics.c
+++ b/clang/test/CodeGen/aarch64-v8.2a-neon-intrinsics.c
@@ -1,5 +1,5 @@
 // RUN: %clang_cc1 -triple arm64-none-linux-gnu -target-feature +neon -target-feature +fullfp16 -target-feature +v8.2a\
-// RUN: -fallow-half-arguments-and-returns -S -disable-O0-optnone -emit-llvm -o - %s \
+// RUN: -fallow-half-arguments-and-returns -flax-vector-conversions=none -S -disable-O0-optnone -emit-llvm -o - %s \
 // RUN: | opt -S -mem2reg \
 // RUN: | FileCheck %s
 
diff --git a/clang/utils/TableGen/NeonEmitter.cpp b/clang/utils/TableGen/NeonEmitter.cpp
--- a/clang/utils/TableGen/NeonEmitter.cpp
+++ b/clang/utils/TableGen/NeonEmitter.cpp
@@ -1442,7 +1442,8 @@
     }
 
     // Check if an explicit cast is needed.
-    if (CastToType.isVector() && LocalCK == ClassB) {
+    if (CastToType.isVector() &&
+        (LocalCK == ClassB || (T.isHalf() && !T.isScalarForMangling()))) {
       CastToType.makeInteger(8, true);
       Arg = "(" + CastToType.str() + ")" + Arg;
     } else if (CastToType.isVector() && LocalCK == ClassI) {