[clang] [CIR][LLVMLowering] Upstream binary operators for VectorType (PR #140099)

[Andy Kaylor via cfe-commits]

================
@@ -57,7 +57,11 @@ namespace {
 // TODO(cir): Return the vector element type once we have support for vectors
 // instead of the identity type.
 mlir::Type elementTypeIfVector(mlir::Type type) {
-  assert(!cir::MissingFeatures::vectorType());
+  if (auto vecType = mlir::dyn_cast<cir::VectorType>(type))
+    return vecType.getElementType();
+
+  if (auto vecType = mlir::dyn_cast<mlir::VectorType>(type))
----------------
andykaylor wrote:

This got duplicated, but you also made this change in another PR, right? 

https://github.com/llvm/llvm-project/pull/140099