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5bc036661c
It lowers let property accesses of classes.
Lowering consists of two tasks:
* In class initializers, insert `end_init_let_ref` instructions at places where all let-fields are initialized.
This strictly separates the life-range of the class into a region where let fields are still written during
initialization and a region where let fields are truly immutable.
* Add the `[immutable]` flag to all `ref_element_addr` instructions (for let-fields) which are in the "immutable"
region. This includes the region after an inserted `end_init_let_ref` in an class initializer, but also all
let-field accesses in other functions than the initializer and the destructor.
This pass should run after DefiniteInitialization but before RawSILInstLowering (because it relies on `mark_uninitialized` still present in the class initializer).
Note that it's not mandatory to run this pass. If it doesn't run, SIL is still correct.
Simplified example (after lowering):
bb0(%0 : @owned C): // = self of the class initializer
%1 = mark_uninitialized %0
%2 = ref_element_addr %1, #C.l // a let-field
store %init_value to %2
%3 = end_init_let_ref %1 // inserted by lowering
%4 = ref_element_addr [immutable] %3, #C.l // set to immutable by lowering
%5 = load %4
99 lines
4.7 KiB
Swift
99 lines
4.7 KiB
Swift
// Passing demangled name
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// RUN: %empty-directory(%t)
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// RUN: %target-swift-frontend %s -g -module-name basic -emit-sib -o %t/demangle-ext-foo.sib; %target-sil-func-extractor -module-name basic -func="basic.foo" %t/demangle-ext-foo.sib | %FileCheck %s -check-prefix=EXTRACT-FOO
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// RUN: %target-swift-frontend %s -g -module-name basic -emit-sib -o %t/demangle-ext-test.sib; %target-sil-func-extractor -module-name basic -func="basic.X.test" %t/demangle-ext-test.sib | %FileCheck %s -check-prefix=EXTRACT-TEST
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// RUN: %target-swift-frontend %s -g -module-name basic -emit-sib -o %t/demangle-ext-init.sib; %target-sil-func-extractor -module-name basic -func="basic.Vehicle.init" %t/demangle-ext-init.sib | %FileCheck %s -check-prefix=EXTRACT-INIT
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// RUN: %target-swift-frontend %s -g -module-name basic -emit-sib -o %t/demangle-ext-now.sib; %target-sil-func-extractor -module-name basic -func="basic.Vehicle.now" %t/demangle-ext-now.sib | %FileCheck %s -check-prefix=EXTRACT-NOW
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// Passing mangled name
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// RUN: %target-swift-frontend %s -g -module-name basic -emit-sib -o %t/mangle-ext-foo.sib; %target-sil-func-extractor -module-name basic -func='$s5basic3fooSiyF' %t/mangle-ext-foo.sib | %FileCheck %s -check-prefix=EXTRACT-FOO
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// RUN: %target-swift-frontend %s -g -module-name basic -emit-sib -o %t/mangle-ext-test.sib; %target-sil-func-extractor -module-name basic -func='$s5basic1XV4testyyF' %t/mangle-ext-test.sib | %FileCheck %s -check-prefix=EXTRACT-TEST
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// RUN: %target-swift-frontend %s -g -module-name basic -emit-sib -o %t/mangle-ext-init.sib; %target-sil-func-extractor -module-name basic -func='$s5basic7VehicleC1nACSi_tcfc' %t/mangle-ext-init.sib | %FileCheck %s -check-prefix=EXTRACT-INIT
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// RUN: %target-swift-frontend %s -g -module-name basic -emit-sib -o %t/mangle-ext-now.sib; %target-sil-func-extractor -module-name basic -func='$s5basic7VehicleC3nowSiyF' %t/mangle-ext-now.sib | %FileCheck %s -check-prefix=EXTRACT-NOW
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// REQUIRES: swift_in_compiler
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// EXTRACT-FOO-NOT: sil hidden @$s5basic1XV4testyyF : $@convention(method) (X) -> () {
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// EXTRACT-FOO-NOT: sil hidden @$s5basic7VehicleC1nACSi_tcfc : $@convention(method) (Int, @guaranteed Vehicle) -> @owned Vehicle {
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// EXTRACT-FOO-NOT: sil hidden @$s5basic7VehicleC3nowSiyF : $@convention(method) (@guaranteed Vehicle) -> Int {
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// EXTRACT-FOO-LABEL: sil @$s5basic3fooSiyF : $@convention(thin) () -> Int {
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// EXTRACT-FOO: bb0:
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// EXTRACT-FOO-NEXT: %0 = integer_literal
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// EXTRACT-FOO: %[[POS:.*]] = struct $Int
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// EXTRACT-FOO-NEXT: return %[[POS]] : $Int
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// EXTRACT-TEST-NOT: sil hidden @$s5basic3fooSiyF : $@convention(thin) () -> Int {
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// EXTRACT-TEST-NOT: sil hidden @$s5basic7VehicleC1nACSi_tcfc : $@convention(method) (Int, @guaranteed Vehicle) -> @owned Vehicle {
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// EXTRACT-TEST-NOT: sil hidden @$s5basic7VehicleC3nowSiyF : $@convention(method) (@guaranteed Vehicle) -> Int {
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// EXTRACT-TEST-LABEL: sil @$s5basic1XV4testyyF : $@convention(method) (X) -> () {
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// EXTRACT-TEST: bb0(%0 : $X):
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// EXTRACT-TEST-NEXT: function_ref
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// EXTRACT-TEST-NEXT: function_ref @$s5basic3fooSiyF : $@convention(thin) () -> Int
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// EXTRACT-TEST-NEXT: apply
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// EXTRACT-TEST-NEXT: tuple
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// EXTRACT-TEST-NEXT: return
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// EXTRACT-INIT-NOT: sil @$s5basic3fooSiyF : $@convention(thin) () -> Int {
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// EXTRACT-INIT-NOT: sil @$s5basic1XV4testyyF : $@convention(method) (X) -> () {
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// EXTRACT-INIT-NOT: sil @$s5basic7VehicleC3nowSiyF : $@convention(method) (@owned Vehicle) -> Int {
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// EXTRACT-INIT-LABEL: sil @$s5basic7VehicleC1nACSi_tcfc : $@convention(method) (Int, @owned Vehicle) -> @owned Vehicle {
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// EXTRACT-INIT: bb0
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// EXTRACT-INIT-NEXT: end_init_let_ref
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// EXTRACT-INIT-NEXT: ref_element_addr
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// EXTRACT-INIT-NEXT: begin_access [init] [static]
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// EXTRACT-INIT-NEXT: store
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// EXTRACT-INIT-NEXT: end_access
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// EXTRACT-INIT-NEXT: return
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// EXTRACT-NOW-NOT: sil @$s5basic3fooSiyF : $@convention(thin) () -> Int {
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// EXTRACT-NOW-NOT: sil @$s5basic1XV4testyyF : $@convention(method) (X) -> () {
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// EXTRACT-NOW-NOT: sil @$s5basic7VehicleC1nACSi_tcfc : $@convention(method) (Int, @guaranteed Vehicle) -> @owned Vehicle {
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// EXTRACT-NOW-LABEL: sil @$s5basic7VehicleC3nowSiyF : $@convention(method) (@guaranteed Vehicle) -> Int {
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// EXTRACT-NOW: bb0
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// EXTRACT-NOW: class_method
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// EXTRACT-NOW-NEXT: apply
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// EXTRACT-NOW-NEXT: return
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public struct X {
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@usableFromInline
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@inlinable
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func test() {
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foo()
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}
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}
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@_fixed_layout
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public class Vehicle {
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@usableFromInline
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var numOfWheels: Int
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@usableFromInline
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@inlinable
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init(n: Int) {
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numOfWheels = n
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}
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@usableFromInline
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@inlinable
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func now() -> Int {
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return numOfWheels
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}
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}
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@discardableResult
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@usableFromInline
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@inlinable
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func foo() -> Int {
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return 7
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}
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