3 files changed, 16 insertions, 0 deletions
diff --git a/clang/lib/AST/ItaniumMangle.cpp b/clang/lib/AST/ItaniumMangle.cpp
index 58e2bc8a39b..f95dc8458e8 100644
--- a/clang/lib/AST/ItaniumMangle.cpp
+++ b/clang/lib/AST/ItaniumMangle.cpp
@@ -2195,6 +2195,9 @@ CXXNameMangler::mangleOperatorName(OverloadedOperatorKind OO, unsigned Arity) {
   // Proposal on cxx-abi-dev, 2015-10-21.
   //              ::= aw        # co_await
   case OO_Coawait: Out << "aw"; break;
+  // Proposed in cxx-abi github issue 43.
+  //              ::= ss        # <=>
+  case OO_Spaceship: Out << "ss"; break;
 
   case OO_None:
   case NUM_OVERLOADED_OPERATORS:
diff --git a/clang/lib/AST/MicrosoftMangle.cpp b/clang/lib/AST/MicrosoftMangle.cpp
index c8048544ab8..0c55c1a9228 100644
--- a/clang/lib/AST/MicrosoftMangle.cpp
+++ b/clang/lib/AST/MicrosoftMangle.cpp
@@ -1192,6 +1192,15 @@ void MicrosoftCXXNameMangler::mangleOperatorName(OverloadedOperatorKind OO,
   // <operator-name> ::= ?__L # co_await
   case OO_Coawait: Out << "?__L"; break;
 
+  case OO_Spaceship: {
+    // FIXME: Once MS picks a mangling, use it.
+    DiagnosticsEngine &Diags = Context.getDiags();
+    unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
+      "cannot mangle this three-way comparison operator yet");
+    Diags.Report(Loc, DiagID);
+    break;
+  }
+
   case OO_Conditional: {
     DiagnosticsEngine &Diags = Context.getDiags();
     unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
diff --git a/clang/lib/AST/StmtProfile.cpp b/clang/lib/AST/StmtProfile.cpp
index 6cc77f682ee..00ef0da18bb 100644
--- a/clang/lib/AST/StmtProfile.cpp
+++ b/clang/lib/AST/StmtProfile.cpp
@@ -1384,6 +1384,10 @@ static Stmt::StmtClass DecodeOperatorCall(const CXXOperatorCallExpr *S,
   case OO_GreaterEqual:
     BinaryOp = BO_GE;
     return Stmt::BinaryOperatorClass;
+
+  case OO_Spaceship:
+    // FIXME: Update this once we support <=> expressions.
+    llvm_unreachable("<=> expressions not supported yet");
       
   case OO_AmpAmp:
     BinaryOp = BO_LAnd;