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The intent for `@inline(always)` is to act as an optimization control. The user can rely on inlining to happen or the compiler will emit an error message. Because function values can be dynamic (closures, protocol/class lookup) this guarantee can only be upheld for direct function references. In cases where the optimizer can resolve dynamic function values the attribute shall be respected. rdar://148608854
34 lines
1.4 KiB
Plaintext
34 lines
1.4 KiB
Plaintext
// RUN: %target-sil-opt -sil-print-types -enable-sil-verify-all -enable-sil-opaque-values -inline %s | %FileCheck %s
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// Check cloning of instructions that are only legal in opaque values mode.
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// REQUIRES: objc_interop
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import Swift
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struct UnownedBox<T : AnyObject> {
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unowned var value: T
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}
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// CHECK-LABEL: sil [ossa] @unowned_copy_value_caller : {{.*}} {
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// CHECK: bb0([[STRONG:%[^,]+]] :
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// CHECK: [[UNOWNED:%[^,]+]] = unowned_copy_value [[STRONG]]
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// CHECK: destroy_value [[STRONG]]
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// CHECK: [[RETVAL:%[^,]+]] = struct $UnownedBox<T> ([[UNOWNED]] :
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// CHECK: return [[RETVAL]]
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// CHECK-LABEL: } // end sil function 'unowned_copy_value_caller'
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sil [ossa] @unowned_copy_value_caller : $@convention(thin) <T where T : AnyObject> (@owned T) -> @out UnownedBox<T> {
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bb0(%value : @owned $T):
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%callee = function_ref @unowned_copy_value : $@convention(thin) <T where T : AnyObject> (@owned T) -> @out UnownedBox<T>
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%retval = apply %callee<T>(%value) : $@convention(thin) <T where T : AnyObject> (@owned T) -> @out UnownedBox<T>
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return %retval : $UnownedBox<T>
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}
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sil [heuristic_always_inline] [ossa] @unowned_copy_value : $@convention(thin) <T where T : AnyObject> (@owned T) -> @out UnownedBox<T> {
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bb0(%owned_value : @owned $T):
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%unowned_value = unowned_copy_value %owned_value : $T
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destroy_value %owned_value : $T
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%instance = struct $UnownedBox<T> (%unowned_value : $@sil_unowned T)
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return %instance : $UnownedBox<T>
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}
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