fix PR5983, reject function bodies with no blocks per the grammar.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93067 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AsmParser/LLParser.cpp b/lib/AsmParser/LLParser.cpp
index 3ee683f..9de1ff9 100644
--- a/lib/AsmParser/LLParser.cpp
+++ b/lib/AsmParser/LLParser.cpp
@@ -2779,6 +2779,10 @@
PerFunctionState PFS(*this, Fn, FunctionNumber);
+ // We need at least one basic block.
+ if (Lex.getKind() == lltok::rbrace || Lex.getKind() == lltok::kw_end)
+ return TokError("function body requires at least one basic block");
+
while (Lex.getKind() != lltok::rbrace && Lex.getKind() != lltok::kw_end)
if (ParseBasicBlock(PFS)) return true;