mirror of https://github.com/rust-lang/rust
35 lines
897 B
Rust
35 lines
897 B
Rust
// skip-filecheck
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#![feature(control_flow_enum)]
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#![feature(try_trait_v2)]
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//@ compile-flags: -Zunsound-mir-opts
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use std::ops::ControlFlow;
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// EMIT_MIR separate_const_switch.too_complex.JumpThreading.diff
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fn too_complex(x: Result<i32, usize>) -> Option<i32> {
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// The pass should break the outer match into
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// two blocks that only have one parent each.
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// Parents are one of the two branches of the first
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// match, so a later pass can propagate constants.
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match {
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match x {
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Ok(v) => ControlFlow::Continue(v),
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Err(r) => ControlFlow::Break(r),
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}
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} {
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ControlFlow::Continue(v) => Some(v),
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ControlFlow::Break(r) => None,
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}
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}
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// EMIT_MIR separate_const_switch.identity.JumpThreading.diff
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fn identity(x: Result<i32, i32>) -> Result<i32, i32> {
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Ok(x?)
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}
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fn main() {
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too_complex(Ok(0));
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identity(Ok(0));
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}
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