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201 lines
3.8 KiB
Swift
201 lines
3.8 KiB
Swift
// RUN: %target-swift-frontend %s -O -emit-sil | FileCheck %s
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// RUN: %target-swift-frontend %s -O -emit-sil -enable-testing | FileCheck -check-prefix=CHECK-TESTING %s
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// Check if cycles are removed.
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@inline(never)
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func inCycleA() {
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inCycleB()
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}
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@inline(never)
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func inCycleB() {
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inCycleA()
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}
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// Check if unused vtable methods are removed.
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class Base {
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@inline(never)
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func aliveMethod() {
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}
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@inline(never)
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func deadMethod() {
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// introduces a cycle
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testClasses(self)
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}
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// alive, because called with super
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@inline(never)
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func calledWithSuper() {
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}
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// dead, because only overridden method is called
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@inline(never)
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func baseNotCalled() {
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}
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// alive, because called for Derived but not overridden in Derived
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@inline(never)
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func notInDerived() {
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}
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// dead, because only overridden method is called
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@inline(never)
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func notInOther() {
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}
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}
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class Derived : Base {
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@inline(never)
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override func aliveMethod() {
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}
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@inline(never)
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override func deadMethod() {
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}
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@inline(never)
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@_semantics("optimize.sil.never") // avoid devirtualization
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override func calledWithSuper() {
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super.calledWithSuper()
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}
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@inline(never)
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override func baseNotCalled() {
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}
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@inline(never)
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override func notInOther() {
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}
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}
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class Other : Derived {
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@inline(never)
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override func baseNotCalled() {
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}
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@inline(never)
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override func notInDerived() {
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}
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}
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@inline(never)
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@_semantics("optimize.sil.never") // avoid devirtualization
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func testClasses(_ b: Base) {
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b.aliveMethod()
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}
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@inline(never)
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@_semantics("optimize.sil.never") // avoid devirtualization
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func testWithDerived(_ d: Derived) {
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d.baseNotCalled()
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d.notInDerived()
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d.calledWithSuper()
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}
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@inline(never)
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@_semantics("optimize.sil.never") // avoid devirtualization
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func testWithOther(_ o: Other) {
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o.notInOther()
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}
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// Check if dead methods of classes with higher visibility are removed.
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public class PublicClass {
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func publicClassMethod() {
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}
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}
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// Check if unused witness table methods are removed.
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protocol Prot {
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func aliveWitness()
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func deadWitness()
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}
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struct Adopt : Prot {
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@inline(never)
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func aliveWitness() {
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}
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@inline(never)
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func deadWitness() {
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}
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}
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@inline(never)
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@_semantics("optimize.sil.never") // avoid devirtualization
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func testProtocols(_ p: Prot) {
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p.aliveWitness()
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}
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@_semantics("optimize.sil.never") // avoid devirtualization
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public func callTest() {
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testClasses(Base())
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testClasses(Derived())
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testWithDerived(Derived())
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testWithOther(Other())
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testProtocols(Adopt())
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}
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@_semantics("optimize.sil.never") // make sure not eliminated
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internal func donotEliminate() {
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return
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}
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// CHECK-NOT: sil {{.*}}inCycleA
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// CHECK-NOT: sil {{.*}}inCycleB
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// CHECK-NOT: sil {{.*}}deadMethod
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// CHECK-NOT: sil {{.*}}deadWitness
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// CHECK-NOT: sil {{.*}}publicClassMethod
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// CHECK-TESTING: sil {{.*}}inCycleA
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// CHECK-TESTING: sil {{.*}}inCycleB
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// CHECK-TESTING: sil {{.*}}deadMethod
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// CHECK-TESTING: sil {{.*}}publicClassMethod
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// CHECK-TESTING: sil {{.*}}deadWitness
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// CHECK-LABEL: @_TF25dead_function_elimination14donotEliminateFT_T_
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// CHECK-LABEL: sil_vtable Base
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// CHECK: aliveMethod
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// CHECK: calledWithSuper
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// CHECK-NOT: deadMethod
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// CHECK-NOT: baseNotCalled
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// CHECK: notInDerived
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// CHECK-NOT: notInOther
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// CHECK-TESTING-LABEL: sil_vtable Base
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// CHECK-TESTING: deadMethod
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// CHECK-LABEL: sil_vtable Derived
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// CHECK: aliveMethod
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// CHECK-NOT: deadMethod
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// CHECK: baseNotCalled
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// CHECK: notInDerived
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// CHECK: notInOther
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// CHECK-TESTING-LABEL: sil_vtable Derived
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// CHECK-TESTING: deadMethod
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// CHECK-LABEL: sil_vtable Other
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// CHECK: aliveMethod
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// CHECK-NOT: deadMethod
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// CHECK: baseNotCalled
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// CHECK: notInDerived
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// CHECK: notInOther
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// CHECK-LABEL: sil_witness_table hidden Adopt: Prot
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// CHECK: aliveWitness!1: @{{.*}}aliveWitness
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// CHECK: deadWitness!1: nil
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// CHECK-TESTING-LABEL: sil_witness_table [fragile] Adopt: Prot
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// CHECK-TESTING: deadWitness{{.*}}: @{{.*}}deadWitness
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