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a3fa2464f4
Changes to teach the optimizer pipeline about move_value require some corresponding test updates.
52 lines
1.5 KiB
Swift
52 lines
1.5 KiB
Swift
// RUN: %target-swift-frontend -O %s -parse-as-library -emit-sil -enforce-exclusivity=none -Xllvm -sil-disable-pass=function-signature-opts | %FileCheck %s
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// Test ARC optimizations on source level tests that have been
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// miscompiled and crash (e.g. because of use-after-free).
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// -----------------------------------------------------------------------------
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// rdar://74469299 (ARC miscompile: EscapeAnalysis::mayReleaseContent;
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// potential use-after-free)
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// -----------------------------------------------------------------------------
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public class Base {
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var i = 3
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init() {}
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}
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public class Node : Base {
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var node: Base
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@inline(never)
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init(node: Base) { self.node = node }
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}
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struct Queue {
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var node: Node
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}
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@inline(never)
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func useQueue(q: __owned Queue) {}
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@inline(never)
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func useNode(n: Base) -> Int {
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return n.i
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}
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// CHECK-LABEL: sil [noinline] @$s9arc_crash14testMayReleaseAA4BaseCyF : $@convention(thin) () -> @owned Base {
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// CHECK: [[BASE:%.*]] = alloc_ref $Base
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// CHECK: strong_retain [[BASE]] : $Base
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// CHECK: apply %{{.*}} : $@convention(thin) (@owned Queue) -> ()
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// CHECK-LABEL: } // end sil function '$s9arc_crash14testMayReleaseAA4BaseCyF'
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@inline(never)
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public func testMayRelease() -> Base {
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let n2 = Base()
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let n1 = Node(node: n2)
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let q = Queue(node: n1)
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// n2 must not be release before useQueue.
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useQueue(q: q)
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return n2
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}
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// This crashes when testMayRelease releases the object too early.
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// print("Object:")
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// print(testMayRelease())
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// -----------------------------------------------------------------------------
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