From 218caa410aa38c29984be31a5229b9fa717560ee Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:19:13 +0200 Subject: Merging upstream version 1.68.2+dfsg1. Signed-off-by: Daniel Baumann --- tests/ui/print_type_sizes/repr-align.rs | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 tests/ui/print_type_sizes/repr-align.rs (limited to 'tests/ui/print_type_sizes/repr-align.rs') diff --git a/tests/ui/print_type_sizes/repr-align.rs b/tests/ui/print_type_sizes/repr-align.rs new file mode 100644 index 000000000..0bd11ebc9 --- /dev/null +++ b/tests/ui/print_type_sizes/repr-align.rs @@ -0,0 +1,32 @@ +// compile-flags: -Z print-type-sizes --crate-type=lib +// build-pass +// ignore-pass +// ^-- needed because `--pass check` does not emit the output needed. +// FIXME: consider using an attribute instead of side-effects. + +// This file illustrates how padding is handled: alignment +// requirements can lead to the introduction of padding, either before +// fields or at the end of the structure as a whole. +// +// It avoids using u64/i64 because on some targets that is only 4-byte +// aligned (while on most it is 8-byte aligned) and so the resulting +// padding and overall computed sizes can be quite different. + +#![allow(dead_code)] + +#[repr(align(16))] +#[derive(Default)] +struct A(i32); + +enum E { + A(i32), + B(A) +} + +#[derive(Default)] +pub struct S { + a: i32, + b: i32, + c: A, + d: i8, +} -- cgit v1.2.3