From bf9584b041891d0f079f7cd2ae44d9c1defe1e4d Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Thu, 23 Oct 2003 18:39:22 +0000
Subject: Fail gracefully if we have a zero arg varargs function

llvm-svn: 9436
---
 llvm/lib/CWriter/Writer.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/llvm/lib/CWriter/Writer.cpp b/llvm/lib/CWriter/Writer.cpp
index f65d3d3..b1f8793 100644
--- a/llvm/lib/CWriter/Writer.cpp
+++ b/llvm/lib/CWriter/Writer.cpp
@@ -1193,6 +1193,12 @@ void CWriter::visitCallInst(CallInst &I) {
         
         Out << "va_start(*(va_list*)&" << Mang->getValueName(&I) << ", ";
         // Output the last argument to the enclosing function...
+        if (I.getParent()->getParent()->aempty()) {
+          std::cerr << "The C backend does not currently support zero "
+                    << "argument varargs functions, such as '"
+                    << I.getParent()->getParent()->getName() << "'!\n";
+          abort();
+        }
         writeOperand(&I.getParent()->getParent()->aback());
         Out << ")";
         return;
-- 
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