When performing value-initialization for a class with a non-trivial,
implicitly-defined default constructor, zero-initialize the memory
before calling the default constructor. Previously, we would only
zero-initialize in the case of a trivial default constructor.
Also, simplify the hideous logic that determines when we have a
trivial default constructor and, therefore, don't need to emit any
call at all.
llvm-svn: 111779
diff --git a/clang/test/CodeGenCXX/value-init.cpp b/clang/test/CodeGenCXX/value-init.cpp
index 3273628..6977e73 100644
--- a/clang/test/CodeGenCXX/value-init.cpp
+++ b/clang/test/CodeGenCXX/value-init.cpp
@@ -93,4 +93,22 @@
// CHECK: ret i32
return S().i;
}
+
+ struct X0 {
+ X0() { }
+ int x;
+ };
+
+ struct X1 : X0 {
+ int x1;
+ void f();
+ };
+
+ // CHECK: define void @_ZN8zeroinit9testX0_X1Ev
+ void testX0_X1() {
+ // CHECK: call void @llvm.memset.p0i8.i64
+ // CHECK-NEXT: call void @_ZN8zeroinit2X1C1Ev
+ // CHECK-NEXT: call void @_ZN8zeroinit2X11fEv
+ X1().f();
+ }
}