From b1320cb38158aedd5b59e0e3649ce5d1e90c9776 Mon Sep 17 00:00:00 2001
From: Jim Grosbach <grosbach@apple.com>
Date: Fri, 20 Jan 2012 20:02:39 +0000
Subject: [PATCH] TblGen diagnostic for mismatched template instantiation.

Providing a template argment to a non-templatized class was crashing
tblgen. Add a diagnostic.

For example,
$ cat bug.td
class A;

def B : A<0> {
}
$ llvm-tblgen bug.td
bug.td:3:11: error: template argument provided to non-template class
def B : A<0> {
          ^

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148565 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/TableGen/TGParser.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/TableGen/TGParser.cpp b/lib/TableGen/TGParser.cpp
index 81c68292f1b..9ed7ebbb6bd 100644
--- a/lib/TableGen/TGParser.cpp
+++ b/lib/TableGen/TGParser.cpp
@@ -1516,6 +1516,10 @@ std::vector<Init*> TGParser::ParseValueList(Record *CurRec, Record *ArgsRec,
   unsigned int ArgN = 0;
   if (ArgsRec != 0 && EltTy == 0) {
     const std::vector<Init *> &TArgs = ArgsRec->getTemplateArgs();
+    if (!TArgs.size()) {
+      TokError("template argument provided to non-template class");
+      return std::vector<Init*>();
+    }
     const RecordVal *RV = ArgsRec->getValue(TArgs[ArgN]);
     if (!RV) {
       errs() << "Cannot find template arg " << ArgN << " (" << TArgs[ArgN]
-- 
2.34.1