From 5c4c774c75926402b746b14ba73f01572e464ebb Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sat, 25 Mar 2006 22:12:44 +0000
Subject: [PATCH] Add a missing check which cause an invalid .td file to crash
 tblgen

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27126 91177308-0d34-0410-b5e6-96231b3b80d8
---
 utils/TableGen/DAGISelEmitter.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/utils/TableGen/DAGISelEmitter.cpp b/utils/TableGen/DAGISelEmitter.cpp
index 81a45e1d85e..e9d5c421423 100644
--- a/utils/TableGen/DAGISelEmitter.cpp
+++ b/utils/TableGen/DAGISelEmitter.cpp
@@ -1342,6 +1342,9 @@ void DAGISelEmitter::ParseInstructions() {
       
       // Check that it exists in InstResults.
       TreePatternNode *RNode = InstResults[OpName];
+      if (RNode == 0)
+        I->error("Operand $" + OpName + " does not exist in operand list!");
+        
       if (i == 0)
         Res0Node = RNode;
       Record *R = dynamic_cast<DefInit*>(RNode->getLeafValue())->getDef();
-- 
2.34.1