Imported Upstream version 5.18.0.179

Former-commit-id: 67aa10e65b237e1c4537630979ee99ebe1374215

external/llvm/test/TableGen/TreeNames.td

@@ -0,0 +1,18 @@
+// This tests to make sure we can parse tree patterns with names.
+// RUN: llvm-tblgen %s
+// XFAIL: vg_leak
+
+class TreeNode;
+class RegisterClass;
+
+def set  : TreeNode;
+def plus : TreeNode;
+def imm  : TreeNode;
+def R32  : RegisterClass;
+
+class Inst<dag T> {
+  dag Pattern = T;
+}
+
+def ADDrr32 : Inst<(set R32, (plus R32:$A, R32:$def))>;
+