[clang] [llvm] [HLSL] Implement dot2add intrinsic (PR #131237)

[Ashley Coleman via cfe-commits]

================
@@ -19681,6 +19681,21 @@ Value *CodeGenFunction::EmitHLSLBuiltinExpr(unsigned 
BuiltinID,
         getDotProductIntrinsic(CGM.getHLSLRuntime(), VecTy0->getElementType()),
         ArrayRef<Value *>{Op0, Op1}, nullptr, "hlsl.dot");
   }
+  case Builtin::BI__builtin_hlsl_dot2add: {
+    llvm::Triple::ArchType Arch = CGM.getTarget().getTriple().getArch();
+    if (Arch != llvm::Triple::dxil) {
+      llvm_unreachable("Intrinsic dot2add can be executed as a builtin only on 
dxil");
+    }
+    Value *A = EmitScalarExpr(E->getArg(0));
+    Value *B = EmitScalarExpr(E->getArg(1));
+    Value *C = EmitScalarExpr(E->getArg(2));
+
+    //llvm::Intrinsic::dx_##IntrinsicPostfix
----------------
V-FEXrt wrote:

Delete outdated commented code

https://github.com/llvm/llvm-project/pull/131237
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