[clang] [HLSL] Implement the `lit` intrinsic (PR #134171)

[Chris B via cfe-commits]

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@@ -280,6 +280,17 @@ constexpr bool4 isinf(double4 V) { return isinf((float4)V); }
 _DXC_COMPAT_TERNARY_DOUBLE_OVERLOADS(lerp)
 _DXC_COMPAT_TERNARY_INTEGER_OVERLOADS(lerp)
 
+//===----------------------------------------------------------------------===//
+// lit builtins overloads
+//===----------------------------------------------------------------------===//
+
+template <typename T>
+const inline __detail::enable_if_t<__detail::is_arithmetic<T>::Value,
+                                   vector<T, 4>>
+lit(T NDotL, T NDotH, T M) {
+  return lit<float>((float)NDotL, (float)NDotH, (float)M);
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llvm-beanz wrote:

So, this overload is being removed right?

https://github.com/llvm/llvm-project/pull/134171