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e2bb7e8c8b
Unavailable enum elements cannot be instantiated at runtime without invoking UB. Therefore the optimizer can consider a basic block unreachable if its only predecessor is a block that terminates in a switch instruction matching an unavailable enum element. Furthermore, removing the switch instruction cases that refer to unavailable enum elements is _mandatory_ when `-unavailable-decl-optimization=complete` is specified because otherwise lowered IR for these instructions could refer to enum tag accessors that will not be lowered, resulting in a failure during linking. Resolves rdar://113872720.
209 lines
10 KiB
Swift
209 lines
10 KiB
Swift
// RUN: %empty-directory(%t)
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// RUN: %target-swift-frontend -emit-module -enable-library-evolution -unavailable-decl-optimization=none -emit-module-path=%t/resilient_struct.swiftmodule -module-name=resilient_struct %S/../Inputs/resilient_struct.swift
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// RUN: %target-swift-frontend -emit-module -enable-library-evolution -unavailable-decl-optimization=none -emit-module-path=%t/resilient_enum.swiftmodule -module-name=resilient_enum -I %t %S/../Inputs/resilient_enum.swift
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// RUN: %target-swift-emit-sil -module-name Test -parse-as-library %s -verify -unavailable-decl-optimization=complete -Onone -I %t | %FileCheck %s
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import resilient_struct
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import resilient_enum
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func foo() {}
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public enum HasUnavailableElement {
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case available
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@available(*, unavailable)
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case unavailable
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}
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// CHECK-LABEL: sil @$s4Test22testFullyCoveredSwitchyyAA21HasUnavailableElementOF : $@convention(thin) (HasUnavailableElement) -> () {
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// CHECK: switch_enum %0 : $HasUnavailableElement, case #HasUnavailableElement.available!enumelt: [[AVAILBB:bb[0-9]+]], default [[DEFAULTBB:bb[0-9]+]]
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// CHECK: [[DEFAULTBB]]:
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// CHECK-NEXT: integer_literal $Builtin.Int1, -1
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// CHECK-NEXT: cond_fail {{%.*}} : $Builtin.Int1, "unexpected enum value"
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// CHECK-NEXT: unreachable
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// CHECK: } // end sil function '$s4Test22testFullyCoveredSwitchyyAA21HasUnavailableElementOF'
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public func testFullyCoveredSwitch(_ e: HasUnavailableElement) {
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switch e {
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case .available: ()
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case .unavailable: ()
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}
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}
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// CHECK-LABEL: sil @$s4Test31testFullyCoveredSwitchResilientyy14resilient_enum0F23EnumWithUnavailableCaseOF : $@convention(thin) (@in_guaranteed ResilientEnumWithUnavailableCase) -> () {
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// CHECK: switch_enum_addr %2 : $*ResilientEnumWithUnavailableCase, case #ResilientEnumWithUnavailableCase.available!enumelt: [[AVAILBB:bb[0-9]+]], default [[DEFAULTBB:bb[0-9]+]]
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// CHECK: [[DEFAULTBB]]:
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// CHECK: function_ref @$ss27_diagnoseUnexpectedEnumCase4types5NeverOxm_tlF
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// CHECK-NEXT: apply
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// CHECK-NEXT: unreachable
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// CHECK: } // end sil function '$s4Test31testFullyCoveredSwitchResilientyy14resilient_enum0F23EnumWithUnavailableCaseOF'
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public func testFullyCoveredSwitchResilient(_ e: ResilientEnumWithUnavailableCase) {
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switch e {
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case .available: ()
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case .unavailable: ()
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}
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}
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// CHECK-LABEL: sil @$s4Test37testUnknownDefaultCaseSwitchResilientyy14resilient_enum0g19EnumWithUnavailableE0OF : $@convention(thin) (@in_guaranteed ResilientEnumWithUnavailableCase) -> () {
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// CHECK: switch_enum_addr %2 : $*ResilientEnumWithUnavailableCase, case #ResilientEnumWithUnavailableCase.available!enumelt: [[AVAILBB:bb[0-9]+]], default [[DEFAULTBB:bb[0-9]+]]
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// CHECK: [[DEFAULTBB]]:
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// CHECK: function_ref @$s4Test3fooyyF
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// CHECK-NEXT: apply
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// CHECK: br
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// CHECK: } // end sil function '$s4Test37testUnknownDefaultCaseSwitchResilientyy14resilient_enum0g19EnumWithUnavailableE0OF'
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public func testUnknownDefaultCaseSwitchResilient(_ e: ResilientEnumWithUnavailableCase) {
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switch e {
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case .available: ()
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case .unavailable: ()
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@unknown default:
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foo()
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}
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}
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// CHECK-LABEL: sil @$s4Test35testUnavailableElementSkippedSwitchyyAA03HascD0OF : $@convention(thin) (HasUnavailableElement) -> () {
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// CHECK: switch_enum %0 : $HasUnavailableElement, case #HasUnavailableElement.available!enumelt: [[AVAILBB:bb[0-9]+]], default [[DEFAULTBB:bb[0-9]+]]
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// CHECK: [[DEFAULTBB]]:
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// CHECK: function_ref @$ss27_diagnoseUnexpectedEnumCase4types5NeverOxm_tlF
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// CHECK-NEXT: apply
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// CHECK-NEXT: unreachable
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// CHECK: } // end sil function '$s4Test35testUnavailableElementSkippedSwitchyyAA03HascD0OF'
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public func testUnavailableElementSkippedSwitch(_ e: HasUnavailableElement) {
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switch e {
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case .available: ()
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}
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}
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// CHECK-LABEL: sil @$s4Test44testUnavailableElementSkippedSwitchResilientyy14resilient_enum0g8EnumWithC4CaseOF : $@convention(thin) (@in_guaranteed ResilientEnumWithUnavailableCase) -> () {
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// CHECK: switch_enum_addr %2 : $*ResilientEnumWithUnavailableCase, case #ResilientEnumWithUnavailableCase.available!enumelt: [[AVAILBB:bb[0-9]+]], default [[DEFAULTBB:bb[0-9]+]]
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// CHECK: [[DEFAULTBB]]:
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// CHECK: function_ref @$ss27_diagnoseUnexpectedEnumCase4types5NeverOxm_tlF
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// CHECK-NEXT: apply
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// CHECK-NEXT: unreachable
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// CHECK: } // end sil function '$s4Test44testUnavailableElementSkippedSwitchResilientyy14resilient_enum0g8EnumWithC4CaseOF'
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public func testUnavailableElementSkippedSwitchResilient(_ e: ResilientEnumWithUnavailableCase) {
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switch e {
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case .available: ()
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}
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}
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// CHECK-LABEL: sil @$s4Test33testAvailableElementSkippedSwitchyyAA014HasUnavailableD0OF : $@convention(thin) (HasUnavailableElement) -> () {
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// CHECK: switch_enum %0 : $HasUnavailableElement, default [[DEFAULTBB:bb[0-9]+]]
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// CHECK: [[DEFAULTBB]]:
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// CHECK: function_ref @$s4Test3fooyyF
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// CHECK: apply
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// CHECK: } // end sil function '$s4Test33testAvailableElementSkippedSwitchyyAA014HasUnavailableD0OF'
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public func testAvailableElementSkippedSwitch(_ e: HasUnavailableElement) {
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switch e {
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case .unavailable: ()
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default: foo()
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}
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}
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// CHECK-LABEL: sil @$s4Test26testAvailableElementIfCaseyyAA014HasUnavailableD0OF : $@convention(thin) (HasUnavailableElement) -> () {
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// CHECK: switch_enum %0 : $HasUnavailableElement, case #HasUnavailableElement.available!enumelt: [[AVAILBB:bb[0-9]+]], default [[DEFAULTBB:bb[0-9]+]]
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// CHECK: [[DEFAULTBB]]:
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// CHECK-NEXT: integer_literal $Builtin.Int1, -1
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// CHECK-NEXT: cond_fail {{%.*}} : $Builtin.Int1, "unexpected enum value"
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// CHECK-NEXT: unreachable
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// CHECK: } // end sil function '$s4Test26testAvailableElementIfCaseyyAA014HasUnavailableD0OF'
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public func testAvailableElementIfCase(_ e: HasUnavailableElement) {
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if case .available = e {
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()
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}
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}
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// CHECK-LABEL: sil @$s4Test35testAvailableElementIfCaseResilientyy14resilient_enum0g19EnumWithUnavailableF0OF : $@convention(thin) (@in_guaranteed ResilientEnumWithUnavailableCase) -> () {
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// CHECK switch_enum_addr %2 : $*ResilientEnumWithUnavailableCase, case #ResilientEnumWithUnavailableCase.available!enumelt: [[AVAILBB:bb[0-9]+]], default [[DEFAULTBB:bb[0-9]+]]
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// CHECK: [[DEFAULTBB]]:
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// CHECK-NOT: unreachable
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// CHECK: } // end sil function '$s4Test35testAvailableElementIfCaseResilientyy14resilient_enum0g19EnumWithUnavailableF0OF'
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public func testAvailableElementIfCaseResilient(_ e: ResilientEnumWithUnavailableCase) {
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if case .available = e {
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()
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}
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}
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// CHECK-LABEL: sil @$s4Test28testUnavailableElementIfCaseyyAA03HascD0OF : $@convention(thin) (HasUnavailableElement) -> () {
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// CHECK: switch_enum %0 : $HasUnavailableElement, case #HasUnavailableElement.available!enumelt: [[AVAILBB:bb[0-9]+]], default [[DEFAULTBB:bb[0-9]+]]
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// CHECK: [[DEFAULTBB]]:
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// CHECK-NEXT: integer_literal $Builtin.Int1, -1
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// CHECK-NEXT: cond_fail {{%.*}} : $Builtin.Int1, "unexpected enum value"
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// CHECK-NEXT: unreachable
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// CHECK: } // end sil function '$s4Test28testUnavailableElementIfCaseyyAA03HascD0OF'
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public func testUnavailableElementIfCase(_ e: HasUnavailableElement) {
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if case .unavailable = e {
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()
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}
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}
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// CHECK-LABEL: sil @$s4Test37testUnavailableElementIfCaseResilientyy14resilient_enum0g8EnumWithcF0OF : $@convention(thin) (@in_guaranteed ResilientEnumWithUnavailableCase) -> () {
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// CHECK: switch_enum_addr %2 : $*ResilientEnumWithUnavailableCase, default [[DEFAULTBB:bb[0-9]+]]
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// CHECK: [[DEFAULTBB]]:
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// CHECK-NOT: unreachable
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// CHECK: } // end sil function '$s4Test37testUnavailableElementIfCaseResilientyy14resilient_enum0g8EnumWithcF0OF'
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public func testUnavailableElementIfCaseResilient(_ e: ResilientEnumWithUnavailableCase) {
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if case .unavailable = e {
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()
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}
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}
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// CHECK-LABEL: sil @$s4Test47testFallthroughIntoUnavailableElementCaseSwitchyyAA03HaseF0OF : $@convention(thin) (HasUnavailableElement) -> () {
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// CHECK: switch_enum %0 : $HasUnavailableElement, case #HasUnavailableElement.available!enumelt: [[AVAILBB:bb[0-9]+]], default [[DEFAULTBB:bb[0-9]+]]
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// CHECK: [[AVAILBB]]:
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// CHECK: function_ref @$s4Test3fooyyF
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// CHECK-NEXT: apply
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// CHECK: return
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// CHECK: [[DEFAULTBB]]:
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// CHECK-NEXT: integer_literal $Builtin.Int1, -1
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// CHECK-NEXT: cond_fail {{%.*}} : $Builtin.Int1, "unexpected enum value"
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// CHECK-NEXT: unreachable
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// CHECK: } // end sil function '$s4Test47testFallthroughIntoUnavailableElementCaseSwitchyyAA03HaseF0OF'
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public func testFallthroughIntoUnavailableElementCaseSwitch(_ e: HasUnavailableElement) {
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switch e {
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case .available:
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fallthrough
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case .unavailable:
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foo()
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}
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}
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public struct AvailableStruct {}
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@available(*, unavailable)
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public struct UnavailableStruct {}
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public enum HasUnavailableElementAndPayloads {
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case available(AvailableStruct)
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@available(*, unavailable)
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case unavailable(Double)
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}
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// CHECK-LABEL: sil @$s4Test33testFullyCoveredSwitchWithPayloadyyAA32HasUnavailableElementAndPayloadsOF : $@convention(thin) (HasUnavailableElementAndPayloads) -> () {
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// CHECK: switch_enum %0 : $HasUnavailableElementAndPayloads, case #HasUnavailableElementAndPayloads.available!enumelt: [[AVAILBB:bb[0-9]+]], default [[DEFAULTBB:bb[0-9]+]]
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// CHECK: [[DEFAULTBB]]:
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// CHECK-NEXT: integer_literal $Builtin.Int1, -1
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// CHECK-NEXT: cond_fail {{%.*}} : $Builtin.Int1, "unexpected enum value"
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// CHECK-NEXT: unreachable
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// CHECK: } // end sil function '$s4Test33testFullyCoveredSwitchWithPayloadyyAA32HasUnavailableElementAndPayloadsOF'
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public func testFullyCoveredSwitchWithPayload(_ e: HasUnavailableElementAndPayloads) {
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switch e {
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case .available(_): ()
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case .unavailable(_): ()
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}
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}
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// CHECK-LABEL: sil @$s4Test42testFullyCoveredSwitchWithPayloadResilientyy14resilient_enum0h4Enumf18UnavailableCaseAndG0OF : $@convention(thin) (@in_guaranteed ResilientEnumWithUnavailableCaseAndPayload) -> () {
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// CHECK: switch_enum_addr %2 : $*ResilientEnumWithUnavailableCaseAndPayload, case #ResilientEnumWithUnavailableCaseAndPayload.double!enumelt: [[DOUBLEBB:bb[0-9]+]], default [[DEFAULTBB:bb[0-9]+]]
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// CHECK: [[DEFAULTBB]]:
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// CHECK: function_ref @$ss27_diagnoseUnexpectedEnumCase4types5NeverOxm_tlF
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// CHECK-NEXT: apply
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// CHECK-NEXT: unreachable
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// CHECK: } // end sil function '$s4Test42testFullyCoveredSwitchWithPayloadResilientyy14resilient_enum0h4Enumf18UnavailableCaseAndG0OF'
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public func testFullyCoveredSwitchWithPayloadResilient(_ e: ResilientEnumWithUnavailableCaseAndPayload) {
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switch e {
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case .int(_): ()
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case .double(_): ()
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}
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}
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