mirror of https://github.com/rust-lang/rust
21 lines
674 B
Rust
21 lines
674 B
Rust
//@ test-mir-pass: DataflowConstProp
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// EMIT_MIR issue_81605.f.DataflowConstProp.diff
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// Plese find the original issue [here](https://github.com/rust-lang/rust/issues/81605).
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// This test program comes directly from the issue. Prior to this issue,
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// the compiler cannot simplify the return value of `f` into 2. This was
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// solved by adding a new MIR constant propagation based on dataflow
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// analysis in [#101168](https://github.com/rust-lang/rust/pull/101168).
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// CHECK-LABEL: fn f(
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fn f() -> usize {
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// CHECK: switchInt(const true) -> [0: {{bb.*}}, otherwise: {{bb.*}}];
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1 + if true { 1 } else { 2 }
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// CHECK: _0 = const 2_usize;
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}
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fn main() {
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f();
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}
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