[clang] [llvm] [HLSL] Implementation of dot intrinsic (PR #81190)

[Chris B via cfe-commits]

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@@ -4518,6 +4518,12 @@ def HLSLCreateHandle : LangBuiltin<"HLSL_LANG"> {
   let Prototype = "void*(unsigned char)";
 }
 
+def HLSLDotProduct : LangBuiltin<"HLSL_LANG"> {
+  let Spellings = ["__builtin_hlsl_dot"];
+  let Attributes = [NoThrow, Const, CustomTypeChecking];
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llvm-beanz wrote:

We should add type checking for this builtin in SemaChecking.cpp so that the builtin can't be directly called with invalid argument types.

https://github.com/llvm/llvm-project/pull/81190