mirror of https://github.com/rust-lang/rust
41 lines
886 B
Rust
41 lines
886 B
Rust
//@ test-mir-pass: UnreachablePropagation
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// EMIT_MIR_FOR_EACH_PANIC_STRATEGY
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pub enum Empty {}
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fn empty() -> Option<Empty> {
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None
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}
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fn loop_forever() {
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loop {}
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}
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// EMIT_MIR unreachable_diverging.main.UnreachablePropagation.diff
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fn main() {
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// CHECK-LABEL: fn main(
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// CHECK: bb0: {
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// CHECK: {{_.*}} = empty()
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// CHECK: bb1: {
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// CHECK: switchInt({{.*}}) -> [1: bb2, otherwise: bb6];
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// CHECK: bb2: {
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// CHECK: [[ne:_.*]] = Ne({{.*}}, const false);
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// CHECK: assume(move [[ne]]);
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// CHECK: goto -> bb3;
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// CHECK: bb3: {
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// CHECK: {{_.*}} = loop_forever()
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// CHECK: bb4: {
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// CHECK: unreachable;
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// CHECK: bb5: {
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// CHECK: unreachable;
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// CHECK: bb6: {
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// CHECK: return;
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let x = true;
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if let Some(bomb) = empty() {
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if x {
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loop_forever()
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}
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match bomb {}
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}
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}
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