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Jump threading in an unreachable CFG region can lead to a crash (in an assert compiler) or hang (in an no-assert compiler) in `ValueBase::replaceAllUsesWith`. Unfortunately I couldn't come up with an isolated SIL test case. rdar://92267349
17 lines
239 B
Swift
17 lines
239 B
Swift
// RUN: %target-swift-frontend -O %s -emit-sil -o /dev/null
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public class X {}
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public func testit(_ s: [X]) -> X? {
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var r: X?
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for e in s {
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if r == nil {
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r = e
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} else if e !== r {
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return nil
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}
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}
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return r
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}
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