1 files changed, 157 insertions, 0 deletions
diff --git a/tests/ui/packed/packed-struct-size.rs b/tests/ui/packed/packed-struct-size.rs
new file mode 100644
index 00000000000..c832c7cfad5
--- /dev/null
+++ b/tests/ui/packed/packed-struct-size.rs
@@ -0,0 +1,157 @@
+// run-pass
+#![allow(dead_code)]
+#![allow(non_camel_case_types)]
+#![allow(non_upper_case_globals)]
+
+use std::mem;
+
+#[repr(packed)]
+struct P1S4 {
+    a: u8,
+    b: [u8;  3],
+}
+
+#[repr(packed(2))]
+struct P2S4 {
+    a: u8,
+    b: [u8;  3],
+}
+
+#[repr(packed)]
+struct P1S5 {
+    a: u8,
+    b: u32
+}
+
+#[repr(packed(2))]
+struct P2S2 {
+    a: u8,
+    b: u8
+}
+
+#[repr(packed(2))]
+struct P2S6 {
+    a: u8,
+    b: u32
+}
+
+#[repr(packed(2))]
+struct P2S12 {
+    a: u32,
+    b: u64
+}
+
+#[repr(packed)]
+struct P1S13 {
+    a: i64,
+    b: f32,
+    c: u8,
+}
+
+#[repr(packed(2))]
+struct P2S14 {
+    a: i64,
+    b: f32,
+    c: u8,
+}
+
+#[repr(packed(4))]
+struct P4S16 {
+    a: u8,
+    b: f32,
+    c: i64,
+    d: u16,
+}
+
+#[repr(C, packed(4))]
+struct P4CS20 {
+    a: u8,
+    b: f32,
+    c: i64,
+    d: u16,
+}
+
+enum Foo {
+    Bar = 1,
+    Baz = 2
+}
+
+#[repr(packed)]
+struct P1S3_Foo {
+    a: u8,
+    b: u16,
+    c: Foo
+}
+
+#[repr(packed(2))]
+struct P2_Foo {
+    a: Foo,
+}
+
+#[repr(packed(2))]
+struct P2S3_Foo {
+    a: u8,
+    b: u16,
+    c: Foo
+}
+
+#[repr(packed)]
+struct P1S7_Option {
+    a: f32,
+    b: u8,
+    c: u16,
+    d: Option<Box<f64>>
+}
+
+#[repr(packed(2))]
+struct P2_Option {
+    a: Option<Box<f64>>
+}
+
+#[repr(packed(2))]
+struct P2S7_Option {
+    a: f32,
+    b: u8,
+    c: u16,
+    d: Option<Box<f64>>
+}
+
+// Placing packed structs in statics should work
+static TEST_P1S4: P1S4 = P1S4 { a: 1, b: [2, 3, 4] };
+static TEST_P1S5: P1S5 = P1S5 { a: 3, b: 67 };
+static TEST_P1S3_Foo: P1S3_Foo = P1S3_Foo { a: 1, b: 2, c: Foo::Baz };
+static TEST_P2S2: P2S2 = P2S2 { a: 1, b: 2 };
+static TEST_P2S4: P2S4 = P2S4 { a: 1, b: [2, 3, 4] };
+static TEST_P2S6: P2S6 = P2S6 { a: 1, b: 2 };
+static TEST_P2S12: P2S12 = P2S12 { a: 1, b: 2 };
+static TEST_P4S16: P4S16 = P4S16 { a: 1, b: 2.0, c: 3, d: 4 };
+static TEST_P4CS20: P4CS20 = P4CS20 { a: 1, b: 2.0, c: 3, d: 4 };
+
+fn align_to(value: usize, align: usize) -> usize {
+    (value + (align - 1)) & !(align - 1)
+}
+
+macro_rules! check {
+    ($t:ty, $align:expr, $size:expr) => ({
+        assert_eq!(mem::align_of::<$t>(), $align);
+        assert_eq!(mem::size_of::<$t>(), $size);
+    });
+}
+
+pub fn main() {
+    check!(P1S4, 1, 4);
+    check!(P1S5, 1, 5);
+    check!(P1S13, 1, 13);
+    check!(P1S3_Foo, 1, 3 + mem::size_of::<Foo>());
+    check!(P1S7_Option, 1, 7 + mem::size_of::<Option<Box<f64>>>());
+
+    check!(P2S2, 1, 2);
+    check!(P2S4, 1, 4);
+    check!(P2S6, 2, 6);
+    check!(P2S12, 2, 12);
+    check!(P2S14, 2, 14);
+    check!(P4S16, 4, 16);
+    check!(P4CS20, 4, 20);
+    check!(P2S3_Foo, 2, align_to(3 + mem::size_of::<P2_Foo>(), 2));
+    check!(P2S7_Option, 2, align_to(7 + mem::size_of::<P2_Option>(), 2));
+}