1 files changed, 63 insertions, 0 deletions
diff --git a/src/test/debug-info/unique-enum.rs b/src/test/debug-info/unique-enum.rs
new file mode 100644
index 00000000000..c231ea5a42b
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+++ b/src/test/debug-info/unique-enum.rs
@@ -0,0 +1,63 @@
+// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// xfail-win32 Broken because of LLVM bug: http://llvm.org/bugs/show_bug.cgi?id=16249
+
+// compile-flags:-Z extra-debug-info
+// debugger:break zzz
+// debugger:run
+// debugger:finish
+
+// debugger:print *the_a
+// check:$1 = {{TheA, x = 0, y = 8970181431921507452}, {TheA, 0, 2088533116, 2088533116}}
+
+// debugger:print *the_b
+// check:$2 = {{TheB, x = 0, y = 1229782938247303441}, {TheB, 0, 286331153, 286331153}}
+
+// debugger:print *univariant
+// check:$3 = {{123234}}
+
+// The first element is to ensure proper alignment, irrespective of the machines word size. Since
+// the size of the discriminant value is machine dependent, this has be taken into account when
+// datatype layout should be predictable as in this case.
+enum ABC {
+	TheA { x: i64, y: i64 },
+	TheB (i64, i32, i32),
+}
+
+// This is a special case since it does not have the implicit discriminant field.
+enum Univariant {
+    TheOnlyCase(i64)
+}
+
+fn main() {
+
+    // In order to avoid endianess trouble all of the following test values consist of a single
+    // repeated byte. This way each interpretation of the union should look the same, no matter if
+    // this is a big or little endian machine.
+
+	// 0b0111110001111100011111000111110001111100011111000111110001111100 = 8970181431921507452
+	// 0b01111100011111000111110001111100 = 2088533116
+	// 0b0111110001111100 = 31868
+	// 0b01111100 = 124
+    let the_a = ~TheA { x: 0, y: 8970181431921507452 };
+
+    // 0b0001000100010001000100010001000100010001000100010001000100010001 = 1229782938247303441
+    // 0b00010001000100010001000100010001 = 286331153
+    // 0b0001000100010001 = 4369
+    // 0b00010001 = 17
+    let the_b = ~TheB (0, 286331153, 286331153);
+
+    let univariant = ~TheOnlyCase(123234);
+
+    zzz();
+}
+
+fn zzz() {()}
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