28 lines
666 B
Rust
28 lines
666 B
Rust
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// This test verifies that the MIR we output using the `matches!()` macro is close
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// to the MIR for an `if let` branch.
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pub enum Foo {
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A,
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B,
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C,
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D,
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E,
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F,
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}
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// EMIT_MIR matches_macro.issue_77355_opt.PreCodegen.after.mir
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fn issue_77355_opt(num: Foo) -> u64 {
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// CHECK-LABEL: fn issue_77355_opt(
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// CHECK: switchInt({{.*}}) -> [1: bb1, 2: bb1, otherwise: bb2];
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// CHECK: bb1: {
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// CHECK-NEXT: _0 = const 23_u64;
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// CHECK-NEXT: return;
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// CHECK: bb2: {
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// CHECK-NEXT: _0 = const 42_u64;
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// CHECK-NEXT: return;
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if matches!(num, Foo::B | Foo::C) { 23 } else { 42 }
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}
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fn main() {
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issue_77355_opt(Foo::A);
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}
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