2024-03-25 12:44:58 -05:00
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#![feature(no_core, rustc_attrs, lang_items)]
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#![allow(dead_code)]
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#![crate_type = "lib"]
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#![no_std]
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#![no_core]
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// See also: repr-c-int-dead-variants.rs
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2024-06-21 00:15:36 -05:00
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//@ normalize-stderr-test: "pref: Align\([1-8] bytes\)" -> "pref: $$SOME_ALIGN"
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2024-03-25 12:44:58 -05:00
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// This test depends on the value of the `c_enum_min_bits` target option.
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// As there's no way to actually check it from UI test, we only run this test on a subset of archs.
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// Four archs specifically are chosen: one for major architectures (x86_64, i686, aarch64)
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// and `armebv7r-none-eabi` that has `c_enum_min_bits` set to 8.
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//@ revisions: aarch64-unknown-linux-gnu
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//@[aarch64-unknown-linux-gnu] compile-flags: --target aarch64-unknown-linux-gnu
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//@[aarch64-unknown-linux-gnu] needs-llvm-components: aarch64
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//@ revisions: i686-pc-windows-msvc
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//@[i686-pc-windows-msvc] compile-flags: --target i686-pc-windows-gnu
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//@[i686-pc-windows-msvc] needs-llvm-components: x86
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//@ revisions: x86_64-unknown-linux-gnu
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//@[x86_64-unknown-linux-gnu] compile-flags: --target x86_64-unknown-linux-gnu
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//@[x86_64-unknown-linux-gnu] needs-llvm-components: x86
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//
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//@ revisions: armebv7r-none-eabi
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//@[armebv7r-none-eabi] compile-flags: --target armebv7r-none-eabi
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//@[armebv7r-none-eabi] needs-llvm-components: arm
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// A simple uninhabited type.
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enum Void {}
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// Compiler must not remove dead variants of `#[repr(C, int)]` ADTs.
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#[repr(C)]
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#[rustc_layout(debug)]
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enum Univariant { //~ ERROR layout_of
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Variant(Void),
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}
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// ADTs with variants that have fields must have space allocated for those fields.
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#[repr(C)]
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#[rustc_layout(debug)]
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enum TwoVariants { //~ ERROR layout_of
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Variant1(Void),
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Variant2(u8),
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}
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// Some targets have 4-byte-aligned u64, make it always 8-byte-aligned.
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#[repr(C, align(8))]
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struct Align8U64(u64);
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// This one is 2 x u64: we reserve space for fields in a dead branch.
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#[repr(C)]
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#[rustc_layout(debug)]
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enum DeadBranchHasOtherField { //~ ERROR layout_of
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Variant1(Void, Align8U64),
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Variant2(u8),
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}
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#[lang = "sized"]
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trait Sized {}
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