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