From 7da852fbabe913837820c8c3361e7229322e6975 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Wed, 14 Sep 2005 22:06:36 +0000
Subject: [PATCH] catch unnamed inputs

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23360 91177308-0d34-0410-b5e6-96231b3b80d8
---
 utils/TableGen/DAGISelEmitter.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/utils/TableGen/DAGISelEmitter.cpp b/utils/TableGen/DAGISelEmitter.cpp
index d83faceaee8..847e7ac6631 100644
--- a/utils/TableGen/DAGISelEmitter.cpp
+++ b/utils/TableGen/DAGISelEmitter.cpp
@@ -631,7 +631,15 @@ void DAGISelEmitter::ParseAndResolvePatternFragments(std::ostream &OS) {
 static void HandleUse(TreePattern *I, TreePatternNode *Pat,
                       std::map<std::string, TreePatternNode*> &InstInputs) {
   // No name -> not interesting.
-  if (Pat->getName().empty()) return;
+  if (Pat->getName().empty()) {
+    if (Pat->isLeaf()) {
+      DefInit *DI = dynamic_cast<DefInit*>(Pat->getLeafValue());
+      if (DI && DI->getDef()->isSubClassOf("RegisterClass"))
+        I->error("Input " + DI->getDef()->getName() + " must be named!");
+
+    }
+    return;
+  }
 
   Record *Rec;
   if (Pat->isLeaf()) {