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876cea81ae
Once we move to a copy-on-write implementation of existential value buffers we can no longer consume or destroy values of an opened existential unless the buffer is uniquely owned. Therefore we need to track the allowed operation on opened values. Add qualifiers "mutable_access" and "immutable_access" to open_existential_addr instructions to indicate the allowed access to the opened value. Once we move to a copy-on-write implementation, an "open_existential_addr mutable_access" instruction will ensure unique ownership of the value buffer.
46 lines
1.8 KiB
Plaintext
46 lines
1.8 KiB
Plaintext
// RUN: %target-sil-opt -enable-sil-verify-all %s -mandatory-inlining
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sil_stage raw
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import Builtin
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import Swift
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import SwiftShims
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protocol P {
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func f7() -> () -> Self
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}
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sil hidden @caller : $@convention(thin) (@in P) -> () {
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bb0(%0 : $*P):
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%2 = open_existential_addr immutable_access %0 : $*P to $*@opened("214EF566-CD33-11E6-A1F0-34363BD08DA0") P
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%3 = witness_method $@opened("214EF566-CD33-11E6-A1F0-34363BD08DA0") P, #P.f7!1, %2 : $*@opened("214EF566-CD33-11E6-A1F0-34363BD08DA0") P : $@convention(witness_method) <τ_0_0 where τ_0_0 : P> (@in_guaranteed τ_0_0) -> @owned @callee_owned () -> @out τ_0_0
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%4 = apply %3<@opened("214EF566-CD33-11E6-A1F0-34363BD08DA0") P>(%2) : $@convention(witness_method) <τ_0_0 where τ_0_0 : P> (@in_guaranteed τ_0_0) -> @owned @callee_owned () -> @out τ_0_0
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%5 = function_ref @callee : $@convention(thin) <τ_0_0 where τ_0_0 : P> (@owned @callee_owned () -> @out τ_0_0) -> @out P
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%6 = partial_apply %5<@opened("214EF566-CD33-11E6-A1F0-34363BD08DA0") P>(%4) : $@convention(thin) <τ_0_0 where τ_0_0 : P> (@owned @callee_owned () -> @out τ_0_0) -> @out P
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%9 = alloc_stack $P
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%8 = copy_value %6 : $@callee_owned () -> @out P
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%10 = apply %8(%9) : $@callee_owned () -> @out P
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destroy_addr %9 : $*P
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dealloc_stack %9 : $*P
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destroy_value %6 : $@callee_owned () -> @out P
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destroy_addr %0 : $*P
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%15 = tuple ()
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return %15 : $()
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}
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sil hidden [transparent] @callee : $@convention(thin) <τ_0_0 where τ_0_0 : P> (@owned @callee_owned () -> @out τ_0_0) -> @out P {
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bb0(%0 : $*P, %1 : $@callee_owned () -> @out τ_0_0):
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%2 = alloc_stack $τ_0_0
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%3 = apply %1(%2) : $@callee_owned () -> @out τ_0_0
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%4 = init_existential_addr %0 : $*P, $τ_0_0
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copy_addr [take] %2 to [initialization] %4 : $*τ_0_0
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%6 = tuple ()
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dealloc_stack %2 : $*τ_0_0
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return %6 : $()
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}
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sil_default_witness_table hidden P {
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no_default
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}
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