From e04d1c77ae15a6e973e2fac7723f6c364884f58d Mon Sep 17 00:00:00 2001
From: Anders Carlsson <andersca@mac.com>
Date: Wed, 20 May 2009 01:03:17 +0000
Subject: [PATCH] Add support for binding references to scalar rvalues.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@72153 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/CGExpr.cpp         |  8 ++++++++
 test/CodeGenCXX/references.cpp | 13 ++++++++++---
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/lib/CodeGen/CGExpr.cpp b/lib/CodeGen/CGExpr.cpp
index bb9f20003a..299bb6b4a4 100644
--- a/lib/CodeGen/CGExpr.cpp
+++ b/lib/CodeGen/CGExpr.cpp
@@ -78,6 +78,14 @@ RValue CodeGenFunction::EmitReferenceBindingToExpr(const Expr* E,
     return RValue::get(LV.getAddress());
   }
   
+  if (!hasAggregateLLVMType(E->getType())) {
+    // Make a temporary variable that we can bind the reference to.
+    llvm::Value *Temp = CreateTempAlloca(ConvertTypeForMem(E->getType()), 
+                                         "reftmp");
+    EmitStoreOfScalar(EmitScalarExpr(E), Temp, false, E->getType());
+    return RValue::get(Temp);
+  }
+  
   CGM.ErrorUnsupported(E, "reference binding");
   return GetUndefRValue(DestType);
 }
diff --git a/test/CodeGenCXX/references.cpp b/test/CodeGenCXX/references.cpp
index 2b2b1ff896..a1a6c0ae71 100644
--- a/test/CodeGenCXX/references.cpp
+++ b/test/CodeGenCXX/references.cpp
@@ -19,25 +19,32 @@ void t3() {
 
 struct C {};
 
+void f(const bool&);
 void f(const int&);
 void f(const _Complex int&);
 void f(const C&);
 
+void test_bool() {
+  bool a = true;
+  f(a);
+
+  f(true);
+}
+
 void test_scalar() {
   int a = 10;
-  
   f(a);
+  
+  f(10);
 }
 
 void test_complex() {
   _Complex int a = 10i;
-  
   f(a);
 }
 
 void test_aggregate() {
   C c;
-  
   f(c);
 }