From f652e9a6b01d1aeef13b4376e3d14078ae4b8dec Mon Sep 17 00:00:00 2001
From: John McCall <rjmccall@apple.com>
Date: Tue, 25 Sep 2012 09:10:17 +0000
Subject: [PATCH] Implement Mike Herrick's proposed noexcept mangling.

llvm-svn: 164593
---
 clang/lib/AST/ItaniumMangle.cpp        | 6 +++++-
 clang/test/CodeGenCXX/mangle-exprs.cpp | 7 +++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/clang/lib/AST/ItaniumMangle.cpp b/clang/lib/AST/ItaniumMangle.cpp
index afd425b5ea31..3a168017d7ff 100644
--- a/clang/lib/AST/ItaniumMangle.cpp
+++ b/clang/lib/AST/ItaniumMangle.cpp
@@ -2412,7 +2412,6 @@ recurse:
   case Expr::ExpressionTraitExprClass:
   case Expr::VAArgExprClass:
   case Expr::CXXUuidofExprClass:
-  case Expr::CXXNoexceptExprClass:
   case Expr::CUDAKernelCallExprClass:
   case Expr::AsTypeExprClass:
   case Expr::PseudoObjectExprClass:
@@ -2604,6 +2603,11 @@ recurse:
     Out <<"_E";
     break;
 
+  case Expr::CXXNoexceptExprClass:
+    Out << "nx";
+    mangleExpression(cast<CXXNoexceptExpr>(E)->getOperand());
+    break;
+
   case Expr::UnaryExprOrTypeTraitExprClass: {
     const UnaryExprOrTypeTraitExpr *SAE = cast<UnaryExprOrTypeTraitExpr>(E);
     
diff --git a/clang/test/CodeGenCXX/mangle-exprs.cpp b/clang/test/CodeGenCXX/mangle-exprs.cpp
index 30da4fbbcdf9..2d7a883526db 100644
--- a/clang/test/CodeGenCXX/mangle-exprs.cpp
+++ b/clang/test/CodeGenCXX/mangle-exprs.cpp
@@ -190,4 +190,11 @@ namespace test4 {
 
   // CHECK: void @_ZN5test43tf3INS_1XEEEvDTnw_T_ilLi1EEE
   template void tf3<X>(X*);
+
+}
+
+namespace test5 {
+  template <typename T> void a(decltype(noexcept(T()))) {}
+  template void a<int>(decltype(noexcept(int())));
+  // CHECK: void @_ZN5test51aIiEEvDTnxcvT__EE(
 }
-- 
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