Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/llvm/test/TableGen/AnonDefinitionOnDemand.td

@@ -0,0 +1,13 @@
+// RUN: llvm-tblgen < %s
+// XFAIL: vg_leak
+
+class foo<int X> { int THEVAL = X; }
+def foo_imp : foo<1>;
+
+def x {
+  foo Y = foo_imp;    // This works.
+}
+
+def X {
+  foo Y = foo<1>;     // This should work too, synthesizing a new foo<1>.
+}