AsmParser: Don't crash on an ill-formed MDNodeVector

llvm-svn: 224053

diff --git a/llvm/lib/AsmParser/LLParser.cpp b/llvm/lib/AsmParser/LLParser.cpp
index ca4ba6e..ae007ce 100644 (file)
--- a/llvm/lib/AsmParser/LLParser.cpp
+++ b/llvm/lib/AsmParser/LLParser.cpp
@@ -4686,8 +4686,8 @@ int LLParser::ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS) {
 ///   ::= 'null' | TypeAndValue
 bool LLParser::ParseMDNodeVector(SmallVectorImpl<Metadata *> &Elts,
                                  PerFunctionState *PFS) {
-  assert(Lex.getKind() == lltok::lbrace);
-  Lex.Lex();
+  if (ParseToken(lltok::lbrace, "expected '{' here"))
+    return true;
 
   // Check for an empty list.
   if (EatIfPresent(lltok::rbrace))

diff --git a/llvm/test/Assembler/invalid-mdnode-vector.ll b/llvm/test/Assembler/invalid-mdnode-vector.ll
new file mode 100644 (file)
index 0000000..411cae7
--- /dev/null
+++ b/llvm/test/Assembler/invalid-mdnode-vector.ll
@@ -0,0 +1,4 @@
+; RUN: not llvm-as < %s 2>&1 | FileCheck %s
+
+!0 = metadata!
+; CHECK: expected '{' here