86 lines
1.8 KiB
Rust
86 lines
1.8 KiB
Rust
#![feature(custom_mir, core_intrinsics)]
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extern crate core;
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use core::intrinsics::mir::*;
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union U {
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a: i32,
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b: u32,
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}
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// EMIT_MIR projections.unions.built.after.mir
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#[custom_mir(dialect = "built")]
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fn unions(u: U) -> i32 {
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mir!({
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RET = u.a;
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Return()
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})
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}
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// EMIT_MIR projections.tuples.built.after.mir
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#[custom_mir(dialect = "analysis", phase = "post-cleanup")]
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fn tuples(i: (u32, i32)) -> (u32, i32) {
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mir!(
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// FIXME(JakobDegen): This is necessary because we can't give type hints for `RET`
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let temp: (u32, i32);
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{
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temp.0 = i.0;
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temp.1 = i.1;
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RET = temp;
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Return()
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}
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)
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}
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// EMIT_MIR projections.unwrap.built.after.mir
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#[custom_mir(dialect = "built")]
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fn unwrap(opt: Option<i32>) -> i32 {
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mir!({
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RET = Field(Variant(opt, 1), 0);
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Return()
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})
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}
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// EMIT_MIR projections.unwrap_deref.built.after.mir
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#[custom_mir(dialect = "built")]
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fn unwrap_deref(opt: Option<&i32>) -> i32 {
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mir!({
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RET = *Field::<&i32>(Variant(opt, 1), 0);
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Return()
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})
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}
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// EMIT_MIR projections.set.built.after.mir
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#[custom_mir(dialect = "built")]
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fn set(opt: &mut Option<i32>) {
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mir!({
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place!(Field(Variant(*opt, 1), 0)) = 10;
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Return()
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})
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}
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// EMIT_MIR projections.simple_index.built.after.mir
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#[custom_mir(dialect = "built")]
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fn simple_index(a: [i32; 10], b: &[i32]) -> i32 {
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mir!({
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let temp = 3;
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RET = a[temp];
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RET = (*b)[temp];
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Return()
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})
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}
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fn main() {
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assert_eq!(unions(U { a: 5 }), 5);
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assert_eq!(tuples((5, 6)), (5, 6));
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assert_eq!(unwrap(Some(5)), 5);
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assert_eq!(unwrap_deref(Some(&5)), 5);
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let mut o = Some(5);
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set(&mut o);
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assert_eq!(o, Some(10));
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assert_eq!(simple_index([0; 10], &[0; 10]), 0);
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}
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