1 files changed, 50 insertions, 0 deletions
diff --git a/test/CodeGenCXX/override-layout.cpp b/test/CodeGenCXX/override-layout.cpp
new file mode 100644
index 0000000000..c09dbeff70
--- /dev/null
+++ b/test/CodeGenCXX/override-layout.cpp
@@ -0,0 +1,50 @@
+// RUN: %clang_cc1 -fdump-record-layouts-simple %s 2> %t.layouts
+// RUN: %clang_cc1 -fdump-record-layouts-simple %s > %t.before 2>&1
+// RUN: %clang_cc1 -DPACKED= -DALIGNED16= -fdump-record-layouts-simple -foverride-record-layout=%t.layouts %s > %t.after 2>&1
+// RUN: diff %t.before %t.after
+// RUN: FileCheck %s < %t.after
+
+// If not explicitly disabled, set PACKED to the packed attribute.
+#ifndef PACKED
+#  define PACKED __attribute__((packed))
+#endif
+
+struct Empty1 { };
+struct Empty2 { };
+
+// CHECK: Type: struct X0
+struct X0 : public Empty1 { 
+  int x[6] PACKED; 
+};
+
+// CHECK: Type: struct X1
+struct X1 : public X0, public Empty2 { 
+  char x[13]; 
+  struct X0 y; 
+} PACKED;
+
+// CHECK: Type: struct X2
+struct PACKED X2 :  public X1, public X0, public Empty1 {
+  short x;
+  int y;
+};
+
+// CHECK: Type: struct X3
+struct PACKED X3 : virtual public X1, public X0 {
+  short x;
+  int y;
+};
+
+void use_structs() {
+  struct X0 x0;
+  x0.x[5] = sizeof(struct X0);
+
+  struct X1 x1;
+  x1.x[5] = sizeof(struct X1);
+
+  struct X2 x2;
+  x2.y = sizeof(struct X2);
+
+  struct X3 x3;
+  x3.y = sizeof(struct X3);
+}