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|
// RUN: %target-sil-opt -enable-sil-verify-all -wmo -performance-constant-propagation -simplify-cfg -sil-combine -jumpthread-simplify-cfg -sil-combine -devirtualizer -generic-specializer %s | %FileCheck %s
//
// <rdar://problem/46322928> Failure to devirtualize a protocol method applied to an opened existential blocks implementation of
// DataProtocol.
sil_stage canonical
import Builtin
import Swift
import SwiftShims
public protocol HasFoo {
func foo()
}
@inline(never) func testHasFoo<T>(_ t: T)
struct S1<T> {
init(_: T)
}
extension S1 : HasFoo where T == UInt8 {
func foo()
}
// ConstantPropagation converts checked_cast_addr to unconditional_checked_cast_addr.
// SimplifyCFG removes the trivial branch.
// SILCombine replaces the unconditional_checked_cast_addr with init_existential_addr + copy_addr
// and simplifies the switch condition.
// JumpThreadSimplifyCFG eliminates the dead switch condition.
// SILCombine specializes the witness_method instruction to S1<UInt8>.
// Devirtualization replaces the witness invocation with a direct call.
//
// CHECK-LABEL: sil shared [noinline] @testSpecializedS1 : $@convention(thin) (S1<UInt8>) -> () {
// CHECK: bb0(%0 : $S1<UInt8>):
// CHECK: [[EXIS:%.*]] = alloc_stack $any HasFoo
// CHECK: [[S1:%.*]] = alloc_stack $S1<UInt8>
// CHECK: store %0 to [[S1]] : $*S1<UInt8>
// CHECK: [[HASFOO:%.*]] = alloc_stack $any HasFoo
// CHECK: [[EXIS_ADDR:%.*]] = init_existential_addr [[HASFOO]] : $*any HasFoo, $S1<UInt8>
// CHECK: copy_addr [take] [[S1]] to [init] [[EXIS_ADDR]] : $*S1<UInt8>
// CHECK: copy_addr [take] [[HASFOO]] to [init] [[EXIS]] : $*any HasFoo
// CHECK: [[OPEN_EXIS_ADDR:%.*]] = open_existential_addr immutable_access [[EXIS]] : $*any HasFoo to $*@opened("4E16CBC0-FD9F-11E8-A311-D0817AD9F6DD", any HasFoo) Self
// CHECK: [[OPEN_ADDR:%.*]] = unchecked_addr_cast [[OPEN_EXIS_ADDR]] : $*@opened("4E16CBC0-FD9F-11E8-A311-D0817AD9F6DD", any HasFoo) Self to $*S1<UInt8>
// CHECK: [[F:%.*]] = function_ref @witnessS1 : $@convention(witness_method: HasFoo) (@in_guaranteed S1<UInt8>) -> ()
// CHECK: apply [[F]]([[OPEN_ADDR]]) : $@convention(witness_method: HasFoo) (@in_guaranteed S1<UInt8>) -> ()
// CHECK-LABEL: } // end sil function 'testSpecializedS1'
sil shared [noinline] @testSpecializedS1 : $@convention(thin) (S1<UInt8>) -> () {
bb0(%0 : $S1<UInt8>):
debug_value %0 : $S1<UInt8>, let, name "t", argno 1
debug_value %0 : $S1<UInt8>, let, name "t", argno 1
%3 = alloc_stack $HasFoo
%4 = alloc_stack $S1<UInt8>
store %0 to %4 : $*S1<UInt8>
%6 = alloc_stack $Optional<HasFoo>
%7 = init_enum_data_addr %6 : $*Optional<HasFoo>, #Optional.some!enumelt
checked_cast_addr_br take_always S1<UInt8> in %4 : $*S1<UInt8> to HasFoo in %7 : $*HasFoo, bb1, bb2
bb1:
inject_enum_addr %6 : $*Optional<HasFoo>, #Optional.some!enumelt
br bb3
bb2:
inject_enum_addr %6 : $*Optional<HasFoo>, #Optional.none!enumelt
br bb3
bb3:
switch_enum_addr %6 : $*Optional<HasFoo>, case #Optional.some!enumelt: bb4, case #Optional.none!enumelt: bb5
bb4:
%14 = unchecked_take_enum_data_addr %6 : $*Optional<HasFoo>, #Optional.some!enumelt
copy_addr [take] %14 to [init] %3 : $*HasFoo
dealloc_stack %6 : $*Optional<HasFoo>
dealloc_stack %4 : $*S1<UInt8>
%18 = open_existential_addr immutable_access %3 : $*HasFoo to $*@opened("4E16CBC0-FD9F-11E8-A311-D0817AD9F6DD", HasFoo) Self
%19 = witness_method $@opened("4E16CBC0-FD9F-11E8-A311-D0817AD9F6DD", HasFoo) Self, #HasFoo.foo : <Self where Self : HasFoo> (Self) -> () -> (), %18 : $*@opened("4E16CBC0-FD9F-11E8-A311-D0817AD9F6DD", HasFoo) Self : $@convention(witness_method: HasFoo) <τ_0_0 where τ_0_0 : HasFoo> (@in_guaranteed τ_0_0) -> ()
%20 = apply %19<@opened("4E16CBC0-FD9F-11E8-A311-D0817AD9F6DD", HasFoo) Self>(%18) : $@convention(witness_method: HasFoo) <τ_0_0 where τ_0_0 : HasFoo> (@in_guaranteed τ_0_0) -> ()
destroy_addr %3 : $*HasFoo
br bb6
bb5:
destroy_addr %6 : $*Optional<HasFoo>
dealloc_stack %6 : $*Optional<HasFoo>
dealloc_stack %4 : $*S1<UInt8>
br bb6
bb6:
dealloc_stack %3 : $*HasFoo
%28 = tuple ()
return %28 : $()
}
// CHECK-LABEL: sil shared [noinline] @testSpecializedS1Negative : $@convention(thin) (S1<Int8>) -> () {
// CHECK: bb0(%0 : $S1<Int8>):
// CHECK: [[EXIS:%.*]] = alloc_stack $any HasFoo
// CHECK: [[VAL:%.*]] = alloc_stack $S1<Int8>
// CHECK: store %0 to [[VAL]] : $*S1<Int8>
// CHECK: [[OPT:%.*]] = alloc_stack $Optional<any HasFoo>
// CHECK: [[IEDA:%.*]] = init_enum_data_addr [[OPT]] : $*Optional<any HasFoo>, #Optional.some!enumelt
// CHECK: checked_cast_addr_br take_always S1<Int8> in [[VAL]] : $*S1<Int8> to any HasFoo in [[IEDA]] : $*any HasFoo, bb1, bb2
// bbs...
// CHECK: [[UNWRAP:%.*]] = unchecked_take_enum_data_addr [[OPT]] : $*Optional<any HasFoo>, #Optional.some!enumelt
// CHECK: copy_addr [take] [[UNWRAP]] to [init] [[EXIS]] : $*any HasFoo
// CHECK: [[OPEN:%.*]] = open_existential_addr immutable_access [[EXIS]] : $*any HasFoo to $*@opened("5E16CBC0-FD9F-11E8-A311-D0817AD9F6DD", any HasFoo) Self
// CHECK: [[WM:%.*]] = witness_method $@opened("5E16CBC0-FD9F-11E8-A311-D0817AD9F6DD", any HasFoo) Self, #HasFoo.foo : <Self where Self : HasFoo> (Self) -> () -> (), [[OPEN]] : $*@opened("5E16CBC0-FD9F-11E8-A311-D0817AD9F6DD", any HasFoo) Self : $@convention(witness_method: HasFoo) <τ_0_0 where τ_0_0 : HasFoo> (@in_guaranteed τ_0_0) -> ()
// CHECK: apply [[WM]]<@opened("5E16CBC0-FD9F-11E8-A311-D0817AD9F6DD", any HasFoo) Self>([[OPEN]]) : $@convention(witness_method: HasFoo) <τ_0_0 where τ_0_0 : HasFoo> (@in_guaranteed τ_0_0) -> ()
// CHECK-LABEL: } // end sil function 'testSpecializedS1Negative'
sil shared [noinline] @testSpecializedS1Negative : $@convention(thin) (S1<Int8>) -> () {
bb0(%0 : $S1<Int8>):
debug_value %0 : $S1<Int8>, let, name "t", argno 1
debug_value %0 : $S1<Int8>, let, name "t", argno 1
%3 = alloc_stack $HasFoo
%4 = alloc_stack $S1<Int8>
store %0 to %4 : $*S1<Int8>
%6 = alloc_stack $Optional<HasFoo>
%7 = init_enum_data_addr %6 : $*Optional<HasFoo>, #Optional.some!enumelt
checked_cast_addr_br take_always S1<Int8> in %4 : $*S1<Int8> to HasFoo in %7 : $*HasFoo, bb1, bb2
bb1:
inject_enum_addr %6 : $*Optional<HasFoo>, #Optional.some!enumelt
br bb3
bb2:
inject_enum_addr %6 : $*Optional<HasFoo>, #Optional.none!enumelt
br bb3
bb3:
switch_enum_addr %6 : $*Optional<HasFoo>, case #Optional.some!enumelt: bb4, case #Optional.none!enumelt: bb5
bb4:
%14 = unchecked_take_enum_data_addr %6 : $*Optional<HasFoo>, #Optional.some!enumelt
copy_addr [take] %14 to [init] %3 : $*HasFoo
dealloc_stack %6 : $*Optional<HasFoo>
dealloc_stack %4 : $*S1<Int8>
%18 = open_existential_addr immutable_access %3 : $*HasFoo to $*@opened("5E16CBC0-FD9F-11E8-A311-D0817AD9F6DD", HasFoo) Self
%19 = witness_method $@opened("5E16CBC0-FD9F-11E8-A311-D0817AD9F6DD", HasFoo) Self, #HasFoo.foo : <Self where Self : HasFoo> (Self) -> () -> (), %18 : $*@opened("5E16CBC0-FD9F-11E8-A311-D0817AD9F6DD", HasFoo) Self : $@convention(witness_method: HasFoo) <τ_0_0 where τ_0_0 : HasFoo> (@in_guaranteed τ_0_0) -> ()
%20 = apply %19<@opened("5E16CBC0-FD9F-11E8-A311-D0817AD9F6DD", HasFoo) Self>(%18) : $@convention(witness_method: HasFoo) <τ_0_0 where τ_0_0 : HasFoo> (@in_guaranteed τ_0_0) -> ()
destroy_addr %3 : $*HasFoo
br bb6
bb5:
destroy_addr %6 : $*Optional<HasFoo>
dealloc_stack %6 : $*Optional<HasFoo>
dealloc_stack %4 : $*S1<Int8>
br bb6
bb6:
dealloc_stack %3 : $*HasFoo
%28 = tuple ()
return %28 : $()
}
struct S2<T> {
init(_: T) {}
}
protocol P {}
extension S2 : HasFoo where T : P {
func foo() {}
}
struct IsP : P {}
// CHECK-LABEL: sil shared [noinline] @testSpecializedS2 : $@convention(thin) (S2<IsP>) -> () {
// CHECK: bb0(%0 : $S2<IsP>):
// CHECK: [[EXIS:%.*]] = alloc_stack $any HasFoo
// CHECK: [[S2:%.*]] = alloc_stack $S2<IsP>
// CHECK: store %0 to [[S2]] : $*S2<IsP>
// CHECK: [[HASFOO:%.*]] = alloc_stack $any HasFoo
// CHECK: [[EXIS_ADDR:%.*]] = init_existential_addr [[HASFOO]] : $*any HasFoo, $S2<IsP>
// CHECK: copy_addr [take] [[S2]] to [init] [[EXIS_ADDR]] : $*S2<IsP>
// CHECK: copy_addr [take] [[HASFOO]] to [init] [[EXIS]] : $*any HasFoo
// CHECK: [[OPEN_EXIS_ADDR:%.*]] = open_existential_addr immutable_access [[EXIS]] : $*any HasFoo to $*@opened("4E16D1CE-FD9F-11E8-A311-D0817AD9F6DD", any HasFoo) Self
// CHECK: [[OPEN_ADDR:%.*]] = unchecked_addr_cast [[OPEN_EXIS_ADDR]] : $*@opened("4E16D1CE-FD9F-11E8-A311-D0817AD9F6DD", any HasFoo) Self to $*S2<IsP>
// CHECK: [[F:%.*]] = function_ref @$s9witnessS24main3IsPV_Tg5 : $@convention(witness_method: HasFoo) (S2<IsP>) -> ()
// CHECK: [[ARG:%.*]] = load [[OPEN_ADDR]] : $*S2<IsP>
// CHECK: apply [[F]]([[ARG]]) : $@convention(witness_method: HasFoo) (S2<IsP>) -> ()
// CHECK-LABEL: } // end sil function 'testSpecializedS2'
sil shared [noinline] @testSpecializedS2 : $@convention(thin) (S2<IsP>) -> () {
bb0(%0 : $S2<IsP>):
debug_value %0 : $S2<IsP>, let, name "t", argno 1
debug_value %0 : $S2<IsP>, let, name "t", argno 1
%3 = alloc_stack $HasFoo
%4 = alloc_stack $S2<IsP>
store %0 to %4 : $*S2<IsP>
%6 = alloc_stack $Optional<HasFoo>
%7 = init_enum_data_addr %6 : $*Optional<HasFoo>, #Optional.some!enumelt
checked_cast_addr_br take_always S2<IsP> in %4 : $*S2<IsP> to HasFoo in %7 : $*HasFoo, bb1, bb2
bb1:
inject_enum_addr %6 : $*Optional<HasFoo>, #Optional.some!enumelt
br bb3
bb2:
inject_enum_addr %6 : $*Optional<HasFoo>, #Optional.none!enumelt
br bb3
bb3:
switch_enum_addr %6 : $*Optional<HasFoo>, case #Optional.some!enumelt: bb4, case #Optional.none!enumelt: bb5
bb4:
%14 = unchecked_take_enum_data_addr %6 : $*Optional<HasFoo>, #Optional.some!enumelt
copy_addr [take] %14 to [init] %3 : $*HasFoo
dealloc_stack %6 : $*Optional<HasFoo>
dealloc_stack %4 : $*S2<IsP>
%18 = open_existential_addr immutable_access %3 : $*HasFoo to $*@opened("4E16D1CE-FD9F-11E8-A311-D0817AD9F6DD", HasFoo) Self
%19 = witness_method $@opened("4E16D1CE-FD9F-11E8-A311-D0817AD9F6DD", HasFoo) Self, #HasFoo.foo : <Self where Self : HasFoo> (Self) -> () -> (), %18 : $*@opened("4E16D1CE-FD9F-11E8-A311-D0817AD9F6DD", HasFoo) Self : $@convention(witness_method: HasFoo) <τ_0_0 where τ_0_0 : HasFoo> (@in_guaranteed τ_0_0) -> ()
%20 = apply %19<@opened("4E16D1CE-FD9F-11E8-A311-D0817AD9F6DD", HasFoo) Self>(%18) : $@convention(witness_method: HasFoo) <τ_0_0 where τ_0_0 : HasFoo> (@in_guaranteed τ_0_0) -> ()
destroy_addr %3 : $*HasFoo
br bb6
bb5:
destroy_addr %6 : $*Optional<HasFoo>
dealloc_stack %6 : $*Optional<HasFoo>
dealloc_stack %4 : $*S2<IsP>
br bb6
bb6:
dealloc_stack %3 : $*HasFoo
%28 = tuple ()
return %28 : $()
}
class C {
init() {}
}
struct S3<T> {
init(_: T) {}
}
extension S3 : HasFoo where T : AnyObject {
func foo() {}
}
// CHECK-LABEL: sil shared [noinline] @testSpecializedS3 : $@convention(thin) (S3<C>) -> () {
// CHECK: bb0(%0 : $S3<C>):
// CHECK: [[EXIS:%.*]] = alloc_stack $any HasFoo
// CHECK: [[S3:%.*]] = alloc_stack $S3<C>
// CHECK: store %0 to [[S3]] : $*S3<C>
// CHECK: [[HASFOO:%.*]] = alloc_stack $any HasFoo
// CHECK: [[EXIS_ADDR:%.*]] = init_existential_addr [[HASFOO]] : $*any HasFoo, $S3<C>
// CHECK: copy_addr [take] [[S3]] to [init] [[EXIS_ADDR]] : $*S3<C>
// CHECK: copy_addr [take] [[HASFOO]] to [init] [[EXIS]] : $*any HasFoo
// CHECK: [[OPEN_EXIS_ADDR:%.*]] = open_existential_addr immutable_access [[EXIS]] : $*any HasFoo to $*@opened("4E16D5E8-FD9F-11E8-A311-D0817AD9F6DD", any HasFoo) Self
// CHECK: [[OPEN_ADDR:%.*]] = unchecked_addr_cast [[OPEN_EXIS_ADDR]] : $*@opened("4E16D5E8-FD9F-11E8-A311-D0817AD9F6DD", any HasFoo) Self to $*S3<C>
// CHECK: [[F:%.*]] = function_ref @$s9witnessS34main1CC_Tg5 : $@convention(witness_method: HasFoo) (S3<C>) -> ()
// CHECK: [[ARG:%.*]] = load [[OPEN_ADDR]] : $*S3<C>
// CHECK: apply [[F]]([[ARG]]) : $@convention(witness_method: HasFoo) (S3<C>) -> ()
// CHECK-LABEL: } // end sil function 'testSpecializedS3'
sil shared [noinline] @testSpecializedS3 : $@convention(thin) (S3<C>) -> () {
bb0(%0 : $S3<C>):
debug_value %0 : $S3<C>, let, name "t", argno 1
debug_value %0 : $S3<C>, let, name "t", argno 1
%3 = alloc_stack $HasFoo
%4 = alloc_stack $S3<C>
store %0 to %4 : $*S3<C>
%6 = alloc_stack $Optional<HasFoo>
%7 = init_enum_data_addr %6 : $*Optional<HasFoo>, #Optional.some!enumelt
checked_cast_addr_br take_always S3<C> in %4 : $*S3<C> to HasFoo in %7 : $*HasFoo, bb1, bb2
bb1:
inject_enum_addr %6 : $*Optional<HasFoo>, #Optional.some!enumelt
br bb3
bb2:
inject_enum_addr %6 : $*Optional<HasFoo>, #Optional.none!enumelt
br bb3
bb3:
switch_enum_addr %6 : $*Optional<HasFoo>, case #Optional.some!enumelt: bb4, case #Optional.none!enumelt: bb5
bb4:
%14 = unchecked_take_enum_data_addr %6 : $*Optional<HasFoo>, #Optional.some!enumelt
copy_addr [take] %14 to [init] %3 : $*HasFoo
dealloc_stack %6 : $*Optional<HasFoo>
dealloc_stack %4 : $*S3<C>
%18 = open_existential_addr immutable_access %3 : $*HasFoo to $*@opened("4E16D5E8-FD9F-11E8-A311-D0817AD9F6DD", HasFoo) Self
%19 = witness_method $@opened("4E16D5E8-FD9F-11E8-A311-D0817AD9F6DD", HasFoo) Self, #HasFoo.foo : <Self where Self : HasFoo> (Self) -> () -> (), %18 : $*@opened("4E16D5E8-FD9F-11E8-A311-D0817AD9F6DD", HasFoo) Self : $@convention(witness_method: HasFoo) <τ_0_0 where τ_0_0 : HasFoo> (@in_guaranteed τ_0_0) -> ()
%20 = apply %19<@opened("4E16D5E8-FD9F-11E8-A311-D0817AD9F6DD", HasFoo) Self>(%18) : $@convention(witness_method: HasFoo) <τ_0_0 where τ_0_0 : HasFoo> (@in_guaranteed τ_0_0) -> ()
destroy_addr %3 : $*HasFoo
br bb6
bb5:
destroy_addr %6 : $*Optional<HasFoo>
dealloc_stack %6 : $*Optional<HasFoo>
dealloc_stack %4 : $*S3<C>
br bb6
bb6:
dealloc_stack %3 : $*HasFoo
%28 = tuple ()
return %28 : $()
}
class SubC : C {}
struct S4<T> {
init(_: T) {}
}
extension S4 : HasFoo where T : C {
func foo() {}
}
// CHECK-LABEL: sil shared [noinline] @testSpecializedS4 : $@convention(thin) (S4<SubC>) -> () {
// CHECK: bb0(%0 : $S4<SubC>):
// CHECK: [[EXIS:%.*]] = alloc_stack $any HasFoo
// CHECK: [[S3:%.*]] = alloc_stack $S4<SubC>
// CHECK: store %0 to [[S3]] : $*S4<SubC>
// CHECK: [[HASFOO:%.*]] = alloc_stack $any HasFoo
// CHECK: [[EXIS_ADDR:%.*]] = init_existential_addr [[HASFOO]] : $*any HasFoo, $S4<SubC>
// CHECK: copy_addr [take] [[S3]] to [init] [[EXIS_ADDR]] : $*S4<SubC>
// CHECK: copy_addr [take] [[HASFOO]] to [init] [[EXIS]] : $*any HasFoo
// CHECK: [[OPEN_EXIS_ADDR:%.*]] = open_existential_addr immutable_access [[EXIS]] : $*any HasFoo to $*@opened("4E16E402-FD9F-11E8-A311-D0817AD9F6DD", any HasFoo) Self
// CHECK: [[OPEN_ADDR:%.*]] = unchecked_addr_cast [[OPEN_EXIS_ADDR]] : $*@opened("4E16E402-FD9F-11E8-A311-D0817AD9F6DD", any HasFoo) Self to $*S4<SubC>
// CHECK: [[F:%.*]] = function_ref @$s9witnessS44main4SubCC_Tg5 : $@convention(witness_method: HasFoo) (S4<SubC>) -> ()
// CHECK: [[ARG:%.*]] = load [[OPEN_ADDR]] : $*S4<SubC>
// CHECK: apply [[F]]([[ARG]]) : $@convention(witness_method: HasFoo) (S4<SubC>) -> ()
// CHECK: } // end sil function 'testSpecializedS4'
sil shared [noinline] @testSpecializedS4 : $@convention(thin) (S4<SubC>) -> () {
bb0(%0 : $S4<SubC>):
debug_value %0 : $S4<SubC>, let, name "t", argno 1
debug_value %0 : $S4<SubC>, let, name "t", argno 1
%3 = alloc_stack $HasFoo
%4 = alloc_stack $S4<SubC>
store %0 to %4 : $*S4<SubC>
%6 = alloc_stack $Optional<HasFoo>
%7 = init_enum_data_addr %6 : $*Optional<HasFoo>, #Optional.some!enumelt
checked_cast_addr_br take_always S4<SubC> in %4 : $*S4<SubC> to HasFoo in %7 : $*HasFoo, bb1, bb2
bb1:
inject_enum_addr %6 : $*Optional<HasFoo>, #Optional.some!enumelt
br bb3
bb2:
inject_enum_addr %6 : $*Optional<HasFoo>, #Optional.none!enumelt
br bb3
bb3:
switch_enum_addr %6 : $*Optional<HasFoo>, case #Optional.some!enumelt: bb4, case #Optional.none!enumelt: bb5
bb4:
%14 = unchecked_take_enum_data_addr %6 : $*Optional<HasFoo>, #Optional.some!enumelt
copy_addr [take] %14 to [init] %3 : $*HasFoo
dealloc_stack %6 : $*Optional<HasFoo>
dealloc_stack %4 : $*S4<SubC>
%18 = open_existential_addr immutable_access %3 : $*HasFoo to $*@opened("4E16E402-FD9F-11E8-A311-D0817AD9F6DD", HasFoo) Self
%19 = witness_method $@opened("4E16E402-FD9F-11E8-A311-D0817AD9F6DD", HasFoo) Self, #HasFoo.foo : <Self where Self : HasFoo> (Self) -> () -> (), %18 : $*@opened("4E16E402-FD9F-11E8-A311-D0817AD9F6DD", HasFoo) Self : $@convention(witness_method: HasFoo) <τ_0_0 where τ_0_0 : HasFoo> (@in_guaranteed τ_0_0) -> ()
%20 = apply %19<@opened("4E16E402-FD9F-11E8-A311-D0817AD9F6DD", HasFoo) Self>(%18) : $@convention(witness_method: HasFoo) <τ_0_0 where τ_0_0 : HasFoo> (@in_guaranteed τ_0_0) -> ()
destroy_addr %3 : $*HasFoo
br bb6
bb5:
destroy_addr %6 : $*Optional<HasFoo>
dealloc_stack %6 : $*Optional<HasFoo>
dealloc_stack %4 : $*S4<SubC>
br bb6
bb6:
dealloc_stack %3 : $*HasFoo
%28 = tuple ()
return %28 : $()
}
sil private [transparent] [thunk] @witnessS1 : $@convention(witness_method: HasFoo) (@in_guaranteed S1<UInt8>) -> () {
bb0(%0 : $*S1<UInt8>):
%1 = tuple ()
return %1 : $()
}
sil private [transparent] [thunk] @witnessS2 : $@convention(witness_method: HasFoo) <τ_0_0 where τ_0_0 : P> (@in_guaranteed S2<τ_0_0>) -> () {
bb0(%0 : $*S2<τ_0_0>):
%1 = tuple ()
return %1 : $()
}
sil private [transparent] [thunk] @witnessS3 : $@convention(witness_method: HasFoo) <τ_0_0 where τ_0_0 : AnyObject> (@in_guaranteed S3<τ_0_0>) -> () {
bb0(%0 : $*S3<τ_0_0>):
%1 = tuple ()
return %1 : $()
}
sil private [transparent] [thunk] @witnessS4 : $@convention(witness_method: HasFoo) <τ_0_0 where τ_0_0 : C> (@in_guaranteed S4<τ_0_0>) -> () {
bb0(%0 : $*S4<τ_0_0>):
%1 = tuple ()
return %1 : $()
}
sil_vtable C {}
sil_vtable SubC {}
sil_witness_table hidden <T where T == UInt8> S1<T>: HasFoo module tot {
method #HasFoo.foo: <Self where Self : HasFoo> (Self) -> () -> () : @witnessS1
}
sil_witness_table hidden <T where T : P> S2<T>: HasFoo module tot {
method #HasFoo.foo: <Self where Self : HasFoo> (Self) -> () -> () : @witnessS2
conditional_conformance (T: P): dependent
}
sil_witness_table hidden IsP: P module tot {
}
sil_witness_table hidden <T where T : AnyObject> S3<T>: HasFoo module tot {
method #HasFoo.foo: <Self where Self : HasFoo> (Self) -> () -> () : @witnessS3
}
sil_witness_table hidden <T where T : C> S4<T>: HasFoo module tot {
method #HasFoo.foo: <Self where Self : HasFoo> (Self) -> () -> () : @witnessS4
}
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