1 files changed, 11 insertions, 0 deletions
diff --git a/clang/test/CodeGen/const-init.c b/clang/test/CodeGen/const-init.c
index 7d7ccae370d..ccc6604c456 100644
--- a/clang/test/CodeGen/const-init.c
+++ b/clang/test/CodeGen/const-init.c
@@ -159,3 +159,14 @@ void g29() {
   static int b[1] = { "asdf" }; // expected-warning {{incompatible pointer to integer conversion initializing 'int' with an expression of type 'char [5]'}}
   static int c[1] = { L"a" };
 }
+
+// PR21300
+void g30() {
+#pragma pack(1)
+  static struct {
+    int : 1;
+    int x;
+  } a = {};
+  // CHECK: @g30.a = internal global %struct.anon.1 <{ i8 undef, i32 0 }>, align 1
+#pragma pack()
+}