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53 lines
2.0 KiB
Swift
53 lines
2.0 KiB
Swift
// RUN: %target-swift-frontend -emit-sil -O -parse-as-library -enable-copy-propagation=false -Xllvm -sil-print-all -module-name=main %s 2>&1 | %FileCheck %s --check-prefixes CHECK,CHECK-NOCOPYPROP
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// RUN: %target-swift-frontend -emit-sil -O -parse-as-library -enable-lexical-lifetimes=false -Xllvm -sil-print-all -module-name=main %s 2>&1 | %FileCheck %s --check-prefixes CHECK,CHECK-COPYPROP
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// REQUIRES: swift_in_compiler
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@inline(never)
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func takeGuaranteed(_ a: AnyObject) -> AnyObject {
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return a
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}
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@_silgen_name("getOwned")
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@inline(never)
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func getOwned() -> AnyObject
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// CHECK-LABEL: // testLexical()
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// CHECK: [[A:%.*]] = apply %{{.*}}()
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// CHECK: [[B:%.*]] = move_value [lexical] [var_decl] [[A]]
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// CHECK: [[BB:%.*]] = begin_borrow [[B]]
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// CHECK: apply %{{.*}}([[BB]])
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// CHECK: end_borrow [[BB]]
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// CHECK: apply
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// CHECK: destroy_value [[B]]
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// CHECK-LABEL: } // end sil function
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// LexicalLifetimeEliminator must strip the [lexical] flag
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// before the first round of SemanticARCOpts.
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// CHECK-NOT: *** SIL function after {{.*}} (semantic-arc-opts)
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// CHECK-LABEL: *** SIL function after {{.*}} (sil-lexical-lifetime-eliminator)
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// CHECK-LABEL: // testLexical()
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// CHECK: [[A:%.*]] = apply %{{.*}}()
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// CHECK: [[B:%.*]] = move_value [var_decl] [[A]]
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// CHECK: apply %{{.*}}([[B]])
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// CHECK: apply
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// CHECK: destroy_value [[B]]
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// CHECK-LABEL: } // end sil function
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// The first round of SemanticARCOpts/CopyPropagation must eliminate the
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// redundant move_value that was only needed for a lexical lifetime.
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// CHECK-NOCOPYPROP-LABEL: *** SIL function after {{.*}} (semantic-arc-opts)
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// CHECK-COPYPROP-LABEL: *** SIL function after {{.*}} (copy-propagation)
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// CHECK-LABEL: // testLexical()
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// CHECK: [[A:%.*]] = apply %{{.*}}()
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// CHECK: apply %{{.*}}([[A]])
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// CHECK-LABEL: } // end sil function
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public func testLexical() -> AnyObject {
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let a = getOwned()
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// Without lexical lifetimes, the lifetime of 'a' ends in between the two calls:
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return takeGuaranteed(takeGuaranteed(a))
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}
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