[ObjC] Allow declaring __weak pointer fields in C structs in ARC.
This patch uses the infrastructure added in r326307 for enabling
non-trivial fields to be declared in C structs to allow __weak fields in
C structs in ARC.
This recommits r327206, which was reverted because it caused
module-enabled builders to fail. I discovered that the
CXXRecordDecl::CanPassInRegisters flag wasn't being set correctly in
some cases after I moved it to RecordDecl.
Thanks to Eric Liu for helping me investigate the bug.
rdar://problem/33599681
https://reviews.llvm.org/D44095
llvm-svn: 327870
diff --git a/clang/test/Modules/Inputs/template-nontrivial0.h b/clang/test/Modules/Inputs/template-nontrivial0.h
new file mode 100644
index 0000000..cff080e
--- /dev/null
+++ b/clang/test/Modules/Inputs/template-nontrivial0.h
@@ -0,0 +1,13 @@
+template <class T>
+struct Class0 {
+ Class0();
+ Class0(const Class0<T> &);
+ ~Class0();
+ T *p;
+};
+
+struct S0 {
+ id x;
+};
+
+Class0<S0> returnNonTrivial();