3 files changed, 38 insertions, 2 deletions
diff --git a/clang/lib/AST/Expr.cpp b/clang/lib/AST/Expr.cpp
index 7c80f04be26..34790d27d27 100644
--- a/clang/lib/AST/Expr.cpp
+++ b/clang/lib/AST/Expr.cpp
@@ -556,6 +556,8 @@ const char *CastExpr::getCastKindName() const {
     return "FloatingToIntegral";
   case CastExpr::CK_FloatingCast:
     return "FloatingCast";
+  case CastExpr::CK_MemberPointerToBoolean:
+    return "MemberPointerToBoolean";
   }
 
   assert(0 && "Unhandled cast kind!");
diff --git a/clang/lib/CodeGen/CGExprScalar.cpp b/clang/lib/CodeGen/CGExprScalar.cpp
index 5c6657c6c7d..fce4f111a99 100644
--- a/clang/lib/CodeGen/CGExprScalar.cpp
+++ b/clang/lib/CodeGen/CGExprScalar.cpp
@@ -901,6 +901,35 @@ Value *ScalarExprEmitter::EmitCastExpr(const CastExpr *CE) {
     return Yay;
   }
 
+  case CastExpr::CK_MemberPointerToBoolean: {
+    const MemberPointerType* T = E->getType()->getAs<MemberPointerType>();
+    
+    if (T->getPointeeType()->isFunctionType()) {
+      // We have a member function pointer.
+      llvm::Value *Ptr = CGF.CreateTempAlloca(ConvertType(E->getType()));
+      
+      CGF.EmitAggExpr(E, Ptr, /*VolatileDest=*/false);
+      
+      // Get the pointer.
+      llvm::Value *FuncPtr = Builder.CreateStructGEP(Ptr, 0, "src.ptr");
+      FuncPtr = Builder.CreateLoad(FuncPtr);
+      
+      llvm::Value *IsNotNull = 
+        Builder.CreateICmpNE(FuncPtr,
+                             llvm::Constant::getNullValue(FuncPtr->getType()),
+                             "tobool");
+      
+      return IsNotNull;
+    }
+   
+    // We have a regular member pointer.
+    Value *Ptr = Visit(const_cast<Expr*>(E));
+    llvm::Value *IsNotNull = 
+      Builder.CreateICmpNE(Ptr, CGF.CGM.EmitNullConstant(E->getType()),
+                           "tobool");
+    return IsNotNull;
+  }
+      
   }
 
   // Handle cases where the source is an non-complex type.
diff --git a/clang/lib/Sema/SemaExprCXX.cpp b/clang/lib/Sema/SemaExprCXX.cpp
index 24fd6c5eebb..21ab093a1a5 100644
--- a/clang/lib/Sema/SemaExprCXX.cpp
+++ b/clang/lib/Sema/SemaExprCXX.cpp
@@ -1359,9 +1359,14 @@ Sema::PerformImplicitConversion(Expr *&From, QualType ToType,
     ImpCastExprToType(From, ToType, Kind);
     break;
   }
-  case ICK_Boolean_Conversion:
-    ImpCastExprToType(From, Context.BoolTy, CastExpr::CK_Unknown);
+  case ICK_Boolean_Conversion: {
+    CastExpr::CastKind Kind = CastExpr::CK_Unknown;
+    if (FromType->isMemberPointerType())
+      Kind = CastExpr::CK_MemberPointerToBoolean;
+    
+    ImpCastExprToType(From, Context.BoolTy, Kind);
     break;
+  }
 
   case ICK_Derived_To_Base:
     if (CheckDerivedToBaseConversion(From->getType(),