[clang] [HLSL] Add bounds checks for the hlsl vector arguments and return types (PR #130724)

[Justin Bogner via cfe-commits]

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@@ -89,23 +89,31 @@ void asuint(double4, out uint4, out uint4);
 /// \param X The X input value.
 /// \param Y The Y input value.
 
+template <typename T>
 _HLSL_16BIT_AVAILABILITY(shadermodel, 6.2)
-const inline half distance(half X, half Y) {
+const inline __detail::enable_if_t<__detail::is_arithmetic<T>::Value &&
+                                       __detail::is_same<half, T>::value,
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bogner wrote:

Agree it makes sense to leave as a cleanup, but we should use lower case `value` here rather than llvm conventions since these helpers match the standard C++ versions of the same. 

https://github.com/llvm/llvm-project/pull/130724