1 files changed, 76 insertions, 0 deletions
diff --git a/src/test/debuginfo/generic-struct-style-enum.rs b/src/test/debuginfo/generic-struct-style-enum.rs
new file mode 100644
index 000000000..764330ae2
--- /dev/null
+++ b/src/test/debuginfo/generic-struct-style-enum.rs
@@ -0,0 +1,76 @@
+// min-lldb-version: 310
+
+// Require a gdb that can read DW_TAG_variant_part.
+// min-gdb-version: 8.2
+
+// compile-flags:-g
+
+// gdb-command:set print union on
+// gdb-command:run
+
+// gdb-command:print case1
+// gdbr-check:$1 = generic_struct_style_enum::Regular<u16, u32, i64>::Case1{a: 0, b: 31868, c: 31868, d: 31868, e: 31868}
+
+// gdb-command:print case2
+// gdbr-check:$2 = generic_struct_style_enum::Regular<i16, u32, i64>::Case2{a: 0, b: 286331153, c: 286331153}
+
+// gdb-command:print case3
+// gdbr-check:$3 = generic_struct_style_enum::Regular<u16, i32, u64>::Case3{a: 0, b: 6438275382588823897}
+
+// gdb-command:print univariant
+// gdbr-check:$4 = generic_struct_style_enum::Univariant<i32>::TheOnlyCase{a: -1}
+
+
+#![feature(omit_gdb_pretty_printer_section)]
+#![omit_gdb_pretty_printer_section]
+
+use self::Regular::{Case1, Case2, Case3};
+use self::Univariant::TheOnlyCase;
+
+// NOTE: This is a copy of the non-generic test case. The `Txx` type parameters have to be
+// substituted with something of size `xx` bits and the same alignment as an integer type of the
+// same size.
+
+// 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 Regular<T16, T32, T64> {
+    Case1 { a: T64, b: T16, c: T16, d: T16, e: T16},
+    Case2 { a: T64, b: T32, c: T32},
+    Case3 { a: T64, b: T64 }
+}
+
+enum Univariant<T> {
+    TheOnlyCase { a: T }
+}
+
+fn main() {
+
+    // In order to avoid endianness 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 case1: Regular<u16, u32, i64> = Case1 { a: 0, b: 31868, c: 31868, d: 31868, e: 31868 };
+
+    // 0b0001000100010001000100010001000100010001000100010001000100010001 = 1229782938247303441
+    // 0b00010001000100010001000100010001 = 286331153
+    // 0b0001000100010001 = 4369
+    // 0b00010001 = 17
+    let case2: Regular<i16, u32, i64>  = Case2 { a: 0, b: 286331153, c: 286331153 };
+
+    // 0b0101100101011001010110010101100101011001010110010101100101011001 = 6438275382588823897
+    // 0b01011001010110010101100101011001 = 1499027801
+    // 0b0101100101011001 = 22873
+    // 0b01011001 = 89
+    let case3: Regular<u16, i32, u64>  = Case3 { a: 0, b: 6438275382588823897 };
+
+    let univariant = TheOnlyCase { a: -1 };
+
+    zzz(); // #break
+}
+
+fn zzz() {()}