Fix a buildbot error reported by sanitizer-x86_64-linux-fast:

Function::getGUID may complain if its input is an empty StringRef.

llvm-svn: 334455

1 files changed, 2 insertions, 0 deletions

diff --git a/llvm/include/llvm/ProfileData/SampleProf.h b/llvm/include/llvm/ProfileData/SampleProf.h
index 5103751da35..5221540c63d 100644
--- a/llvm/include/llvm/ProfileData/SampleProf.h
+++ b/llvm/include/llvm/ProfileData/SampleProf.h
@@ -97,6 +97,8 @@ static inline uint64_t SPMagic(SampleProfileFormat Format = SPF_Raw_Binary) {
 static inline StringRef getRepInFormat(StringRef Name,
                                        SampleProfileFormat Format,
                                        std::string &GUIDBuf) {
+  if (Name.empty())
+    return Name;
   GUIDBuf = std::to_string(Function::getGUID(Name));
   return (Format == SPF_Compact_Binary) ? StringRef(GUIDBuf) : Name;
 }