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-rw-r--r--llvm/lib/IR/Value.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/IR/Value.cpp b/llvm/lib/IR/Value.cpp
index 62a3b31c18b..2c90383edd8 100644
--- a/llvm/lib/IR/Value.cpp
+++ b/llvm/lib/IR/Value.cpp
@@ -182,6 +182,8 @@ void Value::setName(const Twine &NewName) {
SmallString<256> NameData;
StringRef NameRef = NewName.toStringRef(NameData);
+ assert(NameRef.find_first_of(0) == StringRef::npos &&
+ "Null bytes are not allowed in names");
// Name isn't changing?
if (getName() == NameRef)
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