1 files changed, 40 insertions, 0 deletions
diff --git a/lld/wasm/Strings.cpp b/lld/wasm/Strings.cpp
new file mode 100644
index 00000000000..fab03cc9f86
--- /dev/null
+++ b/lld/wasm/Strings.cpp
@@ -0,0 +1,40 @@
+//===- Strings.cpp -------------------------------------------------------===//
+//
+//                             The LLVM Linker
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Strings.h"
+#include "Config.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Demangle/Demangle.h"
+
+using namespace llvm;
+
+// Returns the demangled C++ symbol name for Name.
+Optional<std::string> lld::wasm::demangle(StringRef Name) {
+  // itaniumDemangle can be used to demangle strings other than symbol
+  // names which do not necessarily start with "_Z". Name can be
+  // either a C or C++ symbol. Don't call itaniumDemangle if the name
+  // does not look like a C++ symbol name to avoid getting unexpected
+  // result for a C symbol that happens to match a mangled type name.
+  if (!Name.startswith("_Z"))
+    return None;
+
+  char *Buf = itaniumDemangle(Name.str().c_str(), nullptr, nullptr, nullptr);
+  if (!Buf)
+    return None;
+  std::string S(Buf);
+  free(Buf);
+  return S;
+}
+
+std::string lld::wasm::displayName(StringRef Name) {
+  if (Config->Demangle)
+    if (Optional<std::string> S = demangle(Name))
+      return "`" + *S + "'";
+  return Name;
+}