AsmParser: Don't allow null bytes in BB labels

Since Value objects can't have null bytes in their name, we shouldn't
allow them in the labels of basic blocks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223907 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/AsmParser/LLLexer.cpp b/lib/AsmParser/LLLexer.cpp
index cd7f09b8933eff277299aee6d51be460082f7abf..ca3c9e8b6f8611e7a98b8323980846f3bbb92551 100644 (file)
--- a/lib/AsmParser/LLLexer.cpp
+++ b/lib/AsmParser/LLLexer.cpp
@@ -393,7 +393,12 @@ lltok::Kind LLLexer::LexQuote() {
 
   if (CurPtr[0] == ':') {
     ++CurPtr;
-    kind = lltok::LabelStr;
+    if (StringRef(StrVal).find_first_of(0) != StringRef::npos) {
+      Error("Null bytes are not allowed in names");
+      kind = lltok::Error;
+    } else {
+      kind = lltok::LabelStr;
+    }
   }
 
   return kind;

diff --git a/test/Assembler/invalid-name2.ll b/test/Assembler/invalid-name2.ll
new file mode 100644 (file)
index 0000000..384dee6
Binary files /dev/null and b/test/Assembler/invalid-name2.ll differ