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Erik Eckstein
3d84ab5845
If the thunk calls to a no-return function, it is ended with an `unreachable`. This may introduce incomplete lifetimes. Fixes a compiler crash rdar://169555460
46 lines
1.3 KiB
Plaintext
46 lines
1.3 KiB
Plaintext
// RUN: %target-sil-opt %s -existential-specializer -mandatory-performance-optimizations -sil-combine | %FileCheck %s
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sil_stage canonical
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import Builtin
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import Swift
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import SwiftShims
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class C {}
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public protocol P {}
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public struct S : P {
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var o: AnyObject
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}
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// Just check that we generate valid SIL
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// CHECK-LABEL: sil [signature_optimized_thunk] [heuristic_always_inline] [ossa] @doesnt_return :
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// CHECK: } // end sil function 'doesnt_return'
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sil [ossa] @doesnt_return : $@convention(thin) (@in P, @inout P, @owned C) -> Never {
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bb0(%0 : $*P, %1 : $*P, %2 : @owned $C):
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copy_addr %0 to [init] %1
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destroy_addr %0
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destroy_value [dead_end] %2
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unreachable
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}
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// Just check that we generate valid SIL
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// CHECK-LABEL: sil [ossa] @specialize_no_return_function :
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// CHECK-LABEL: } // end sil function 'specialize_no_return_function'
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sil [ossa] @specialize_no_return_function : $@convention(thin) (@owned S, @inout P, @owned C) -> () {
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bb0(%0 : @owned $S, %1 : $*P, %2 : @owned $C):
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%4 = alloc_stack $P
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%5 = init_existential_addr %4, $S
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store %0 to [init] %5
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%7 = function_ref @doesnt_return : $@convention(thin) (@in P, @inout P, @owned C) -> Never
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%8 = apply %7(%4, %1, %2) : $@convention(thin) (@in P, @inout P, @owned C) -> Never
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dealloc_stack %4 : $*P
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%10 = tuple ()
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return %10 : $()
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}
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sil_witness_table S: P module test {}
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