mirror of https://github.com/rust-lang/rust
88 lines
1.8 KiB
Rust
88 lines
1.8 KiB
Rust
// skip-filecheck
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//@ test-mir-pass: EnumSizeOpt
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// EMIT_MIR_FOR_EACH_BIT_WIDTH
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//@ compile-flags: -Zunsound-mir-opts
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#![feature(arbitrary_enum_discriminant, repr128)]
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// Tests that an enum with a variant with no data gets correctly transformed.
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pub enum NoData {
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Large([u8; 8196]),
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None,
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}
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// Tests that an enum with a variant with data that is a valid candidate gets transformed.
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pub enum Candidate {
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Small(u8),
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Large([u8; 8196]),
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}
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// Tests that an enum which has a discriminant much higher than the variant does not get
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// tformed.
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#[repr(u32)]
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pub enum InvalidIdxs {
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A = 302,
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Large([u64; 1024]),
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}
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// Tests that an enum with too high of a discriminant index (not in bounds of usize) does not
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// get tformed.
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#[repr(u128)]
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pub enum NotTrunctable {
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A = 0,
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B([u8; 1024]) = 1,
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C([u8; 4096]) = 0x10000000000000001,
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}
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// Tests that an enum with discriminants in random order still gets tformed correctly.
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#[repr(u32)]
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pub enum RandOrderDiscr {
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A = 13,
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B([u8; 1024]) = 5,
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C = 7,
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}
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// EMIT_MIR enum_opt.unin.EnumSizeOpt.diff
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pub fn unin() -> NoData {
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let mut a = NoData::None;
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a = NoData::Large([1; 8196]);
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a
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}
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// EMIT_MIR enum_opt.cand.EnumSizeOpt.diff
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pub fn cand() -> Candidate {
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let mut a = Candidate::Small(1);
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a = Candidate::Large([1; 8196]);
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a
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}
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// EMIT_MIR enum_opt.invalid.EnumSizeOpt.diff
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pub fn invalid() -> InvalidIdxs {
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let mut a = InvalidIdxs::A;
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a = InvalidIdxs::Large([0; 1024]);
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a
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}
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// EMIT_MIR enum_opt.trunc.EnumSizeOpt.diff
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pub fn trunc() -> NotTrunctable {
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let mut a = NotTrunctable::A;
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a = NotTrunctable::B([0; 1024]);
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a = NotTrunctable::C([0; 4096]);
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a
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}
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pub fn rand_order() -> RandOrderDiscr {
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let mut a = RandOrderDiscr::A;
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a = RandOrderDiscr::B([0; 1024]);
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a = RandOrderDiscr::C;
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a
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}
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pub fn main() {
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unin();
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cand();
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invalid();
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trunc();
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rand_order();
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}
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