[clang] [llvm] [DirectX] Add DirectXTargetCodeGenInfo (PR #104856)

[Damyan Pepper via cfe-commits]

================
@@ -879,6 +879,10 @@ static TargetTypeInfo getTargetTypeInfo(const TargetExtType *Ty) {
         ScalableVectorType::get(Type::getInt8Ty(C), TotalNumElts));
   }
 
+  // DirectX intangible types
+  if (Name.starts_with("dx."))
----------------
damyanp wrote:

I'm surprised that we do a name lookup here, rather than key off some attributes, but I also see that this is how it is done for some spirv and riscv types.

Are we definitely ok with burning all the `dx.` prefixed names for this?



https://github.com/llvm/llvm-project/pull/104856