[CodeGen] Handle flexible array members containing pointers to members

Types can be classified as being zero-initializable or
non-zero-initializable.  We used to classify array types by giving them
the classification of their base element type.  However, incomplete
array types are never initialized directly and thus are always
zero-initializable.

llvm-svn: 238256

1 files changed, 8 insertions, 0 deletions

diff --git a/clang/test/CodeGenCXX/pointers-to-data-members.cpp b/clang/test/CodeGenCXX/pointers-to-data-members.cpp
index bb1b64e0a73..0f2ddaac23b 100644
--- a/clang/test/CodeGenCXX/pointers-to-data-members.cpp
+++ b/clang/test/CodeGenCXX/pointers-to-data-members.cpp
@@ -277,4 +277,12 @@ U u;
 // CHECK-GLOBAL: @_ZN7PR212821uE = global %"union.PR21282::U" { i64 -1, [8 x i8] zeroinitializer }, align 8
 }
 
+namespace FlexibleArrayMember {
+struct S {
+  int S::*x[];
+};
+S s;
+// CHECK-GLOBAL: @_ZN19FlexibleArrayMember1sE = global %"struct.FlexibleArrayMember::S" zeroinitializer, align 8
+}
+
 // CHECK-O3: attributes [[NUW]] = { nounwind readnone{{.*}} }