[llvm] fae1369 - [Demangle] fix another test on windows

[Nick Desaulniers via llvm-commits]

Author: Nick Desaulniers
Date: 2023-04-20T17:23:49-07:00
New Revision: fae136960744aff6ef51c6f38add992bb84d7c13

URL: https://github.com/llvm/llvm-project/commit/fae136960744aff6ef51c6f38add992bb84d7c13
DIFF: https://github.com/llvm/llvm-project/commit/fae136960744aff6ef51c6f38add992bb84d7c13.diff

LOG: [Demangle] fix another test on windows

Alan spotted another test failure that was a result of
https://reviews.llvm.org/D148546 when running expensive checks tests
locally on windows.

Reviewed By: ayzhao

Differential Revision: https://reviews.llvm.org/D148861

Added: 
    

Modified: 
    llvm/lib/ProfileData/ItaniumManglingCanonicalizer.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/lib/ProfileData/ItaniumManglingCanonicalizer.cpp b/llvm/lib/ProfileData/ItaniumManglingCanonicalizer.cpp
index d9f8f0ea75251..afbb09ed35fc1 100644
--- a/llvm/lib/ProfileData/ItaniumManglingCanonicalizer.cpp
+++ b/llvm/lib/ProfileData/ItaniumManglingCanonicalizer.cpp
@@ -23,7 +23,10 @@ struct FoldingSetNodeIDBuilder {
   llvm::FoldingSetNodeID &ID;
   void operator()(const Node *P) { ID.AddPointer(P); }
   void operator()(std::string_view Str) {
-    ID.AddString(llvm::StringRef(&*Str.begin(), Str.size()));
+    if (Str.empty())
+      ID.AddString({});
+    else
+      ID.AddString(llvm::StringRef(&*Str.begin(), Str.size()));
   }
   template <typename T>
   std::enable_if_t<std::is_integral_v<T> || std::is_enum_v<T>> operator()(T V) {