From 7891593359420f69422840584b05f0b0c3b7da52 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sun, 28 Nov 2004 16:45:45 +0000
Subject: [PATCH] Fix PR463

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18303 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/AsmParser/llvmAsmParser.y | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/AsmParser/llvmAsmParser.y b/lib/AsmParser/llvmAsmParser.y
index 1f6b53909f0..4a4803ed875 100644
--- a/lib/AsmParser/llvmAsmParser.y
+++ b/lib/AsmParser/llvmAsmParser.y
@@ -1294,7 +1294,10 @@ ConstVal: Types '[' ConstVector ']' { // Nonempty unsized arr
     delete $1;
   }
   | Types ZEROINITIALIZER {
-    $$ = Constant::getNullValue($1->get());
+    const Type *Ty = $1->get();
+    if (isa<FunctionType>(Ty) || Ty == Type::LabelTy || isa<OpaqueType>(Ty))
+      ThrowException("Cannot create a null initialized value of this type!");
+    $$ = Constant::getNullValue(Ty);
     delete $1;
   };