From 3dc7e7b9c59b9a2ed4f530b32e710a3738611df7 Mon Sep 17 00:00:00 2001
From: John McCall <rjmccall@apple.com>
Date: Sat, 24 Jul 2010 01:17:35 +0000
Subject: [PATCH] Mangle enum constant expressions.  Fixes
 rdar://problem/8204122

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@109315 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/Mangle.cpp     |  6 ++++++
 test/CodeGenCXX/mangle.cpp | 11 +++++++++++
 2 files changed, 17 insertions(+)

diff --git a/lib/CodeGen/Mangle.cpp b/lib/CodeGen/Mangle.cpp
index f408849e95..b5f629aeb5 100644
--- a/lib/CodeGen/Mangle.cpp
+++ b/lib/CodeGen/Mangle.cpp
@@ -1873,6 +1873,12 @@ void CXXNameMangler::mangleExpression(const Expr *E) {
       Out << 'E';
       break;
 
+    case Decl::EnumConstant: {
+      const EnumConstantDecl *ED = cast<EnumConstantDecl>(D);
+      mangleIntegerLiteral(ED->getType(), ED->getInitVal());
+      break;
+    }
+
     case Decl::NonTypeTemplateParm: {
       const NonTypeTemplateParmDecl *PD = cast<NonTypeTemplateParmDecl>(D);
       mangleTemplateParameter(PD->getIndex());
diff --git a/test/CodeGenCXX/mangle.cpp b/test/CodeGenCXX/mangle.cpp
index 37af79b0f9..3a2e112f16 100644
--- a/test/CodeGenCXX/mangle.cpp
+++ b/test/CodeGenCXX/mangle.cpp
@@ -518,3 +518,14 @@ namespace test14 {
     int S::a() { return S::x; }
   }
 }
+
+// rdar://problem/8204122
+namespace test15 {
+  enum E { e = 3 };
+  template <int I> struct S {};
+
+  template <int I> void f(S<I + e>) {}
+
+  // CHECK: define weak_odr void @_ZN6test151fILi7EEEvNS_1SIXplT_LNS_1EE3EEEE(
+  template void f<7>(S<7 + e>);
+}
-- 
2.40.0