Handle converting member pointers to bool.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89692 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGExprScalar.cpp b/lib/CodeGen/CGExprScalar.cpp
index 5c6657c..fce4f11 100644
--- a/lib/CodeGen/CGExprScalar.cpp
+++ b/lib/CodeGen/CGExprScalar.cpp
@@ -901,6 +901,35 @@
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.