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eaf4560cd7
Previously, the checker inserted destroys after each last use. Here, extend the lifetimes of fields as far as possible within their original (unchecked) limits. rdar://99681073
55 lines
1.8 KiB
Swift
55 lines
1.8 KiB
Swift
// RUN: %target-swift-emit-sil -sil-verify-all -module-name moveonly_lifetime -o /dev/null -Xllvm -sil-print-canonical-module -Onone -verify -enable-experimental-feature MoveOnlyClasses %s | %FileCheck %s
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struct C : ~Copyable {
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deinit {}
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}
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@_silgen_name("getC")
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func getC() -> C
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@_silgen_name("takeC")
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func takeC(_ c: __owned C)
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@_silgen_name("borrowC")
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func borrowC(_ c: borrowing C)
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@_silgen_name("something")
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func something()
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// Verify that a move-only value's lifetime extends to the end of the
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// non-consuming scope where it appears but not further (which would require a
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// copy).
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//
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// NOTE: We do not properly maximize lifetimes yet in the address checker. So
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// the lifetimes are shortened in the sides of the diamonds inappropriately.
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//
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// CHECK-LABEL: sil hidden [ossa] @test_diamond__consume_r__use_l : $@convention(thin) (Bool) -> () {
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// CHECK: [[STACK:%.*]] = alloc_stack
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// CHECK: cond_br {{%[^,]+}}, [[LEFT:bb[0-9]+]], [[RIGHT:bb[0-9]+]]
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//
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// CHECK: [[RIGHT]]:
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// CHECK: [[INSTANCE:%.*]] = load [take] [[STACK]]
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// CHECK: [[TAKE_C:%[^,]+]] = function_ref @takeC
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// CHECK: apply [[TAKE_C]]([[INSTANCE]])
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// CHECK: br [[BOTTOM:bb[0-9]+]]
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//
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// CHECK: [[LEFT]]:
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// CHECK: [[INSTANCE:%.*]] = load_borrow [[STACK]]
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// CHECK: [[BORROW_C:%[^,]+]] = function_ref @borrowC
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// CHECK: apply [[BORROW_C]]([[INSTANCE]])
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// CHECK: [[SOMETHING:%[^,]+]] = function_ref @something
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// CHECK: apply [[SOMETHING]]
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// CHECK: destroy_addr [[STACK]]
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// CHECK: br [[BOTTOM]]
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// CHECK-LABEL: } // end sil function 'test_diamond__consume_r__use_l'
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@_silgen_name("test_diamond__consume_r__use_l")
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func test_diamond(_ condition: Bool) {
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let c = getC()
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if condition {
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borrowC(c)
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something()
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} else {
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takeC(c)
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}
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}
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