[clang] [CIR] Upstream Re-Throw with no return (PR #154994)

[Andy Kaylor via cfe-commits]

================
@@ -2646,6 +2646,24 @@ ParseResult cir::InlineAsmOp::parse(OpAsmParser &parser,
   return mlir::success();
 }
 
+//===----------------------------------------------------------------------===//
+// ThrowOp
+//===----------------------------------------------------------------------===//
+
+mlir::LogicalResult cir::ThrowOp::verify() {
+  // For the no-rethrow version, it must have at least the exception pointer.
+  if (rethrows())
+    return success();
+
+  if (getNumOperands() == 1) {
+    if (getTypeInfo())
+      return success();
+    return emitOpError() << "'type_info' symbol attribute missing";
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andykaylor wrote:

Can you add a test for this?

https://github.com/llvm/llvm-project/pull/154994