Move the null pointer constant check from Sema::CheckSingleInitializer/ActOnCallExpr/CheckMessageArgumentTypes/ActOnReturnStmt to Sema::CheckSingleAssignmentConstraints. This makes sure all null pointer assignments are considered compatible.

Thanks to Seo Sanghyeon for the bug, follow-through, and patch!

llvm-svn: 44366

1 files changed, 10 insertions, 0 deletions

diff --git a/clang/test/Sema/assign-null.c b/clang/test/Sema/assign-null.c
new file mode 100644
index 00000000000..6972d902236
--- /dev/null
+++ b/clang/test/Sema/assign-null.c
@@ -0,0 +1,10 @@
+// RUN: clang -fsyntax-only -verify %s
+
+#include <stddef.h>
+
+typedef void (*hookfunc)(void *arg);
+hookfunc hook;
+
+void clear_hook() {
+  hook = NULL;
+}