2 files changed, 11 insertions, 3 deletions
diff --git a/lldb/source/Core/DemangledNameInfo.cpp b/lldb/source/Core/DemangledNameInfo.cpp
index 00227f02bbff..76f8987c5149 100644
--- a/lldb/source/Core/DemangledNameInfo.cpp
+++ b/lldb/source/Core/DemangledNameInfo.cpp
@@ -111,6 +111,11 @@ void TrackingOutputBuffer::finalizeEnd() {
   if (NameInfo.ScopeRange.first > NameInfo.ScopeRange.second)
     NameInfo.ScopeRange.second = NameInfo.ScopeRange.first;
   NameInfo.BasenameRange.first = NameInfo.ScopeRange.second;
+
+  // We call anything past the FunctionEncoding the "suffix".
+  // In practice this would be nodes like `DotSuffix` that wrap
+  // a FunctionEncoding.
+  NameInfo.SuffixRange.first = getCurrentPosition();
 }
 
 ScopedOverride<unsigned> TrackingOutputBuffer::enterFunctionTypePrinting() {
@@ -138,6 +143,9 @@ void TrackingOutputBuffer::printLeft(const Node &N) {
   default:
     OutputBuffer::printLeft(N);
   }
+
+  // Keep updating suffix until we reach the end.
+  NameInfo.SuffixRange.second = getCurrentPosition();
 }
 
 void TrackingOutputBuffer::printRight(const Node &N) {
@@ -151,6 +159,9 @@ void TrackingOutputBuffer::printRight(const Node &N) {
   default:
     OutputBuffer::printRight(N);
   }
+
+  // Keep updating suffix until we reach the end.
+  NameInfo.SuffixRange.second = getCurrentPosition();
 }
 
 void TrackingOutputBuffer::printLeftImpl(const FunctionType &N) {
diff --git a/lldb/source/Core/Mangled.cpp b/lldb/source/Core/Mangled.cpp
index 3663f430111c..ce4db4e0daa8 100644
--- a/lldb/source/Core/Mangled.cpp
+++ b/lldb/source/Core/Mangled.cpp
@@ -172,9 +172,6 @@ GetItaniumDemangledStr(const char *M) {
 
     TrackingOutputBuffer OB(demangled_cstr, demangled_size);
     demangled_cstr = ipd.finishDemangle(&OB);
-    // TODO: we should set the SuffixRange inside the TrackingOutputBuffer.
-    OB.NameInfo.SuffixRange.first = OB.NameInfo.QualifiersRange.second;
-    OB.NameInfo.SuffixRange.second = std::string_view(OB).size();
     info = std::move(OB.NameInfo);
 
     assert(demangled_cstr &&