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1fee4fe953
If the block is passed to another function - either as closure argument or as closure capture - it's "converted" to a swift closure with the help of a thunk. The thunk just calls the block. If this is done with a non-escaping partial_apply, the block does not escape. rdar://149095630
63 lines
1.6 KiB
Swift
63 lines
1.6 KiB
Swift
// RUN: %empty-directory(%t)
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// RUN: split-file %s %t
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// RUN: %target-swift-frontend -I %t %t/test.swift -O -emit-sil | %FileCheck %s
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// REQUIRES: objc_interop
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//--- module.modulemap
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module CModule {
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header "c-header.h"
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export *
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}
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//--- c-header.h
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@import Foundation;
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@interface TestClass : NSObject
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- (void)callHandler1: (NS_NOESCAPE _Nonnull dispatch_block_t)block;
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- (void)callHandler2: (NS_NOESCAPE _Nonnull dispatch_block_t)block;
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- (void)callHandler3: (NS_NOESCAPE _Nonnull dispatch_block_t)block;
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@end
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//--- test.swift
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import CModule
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@objc @implementation
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extension TestClass {
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// CHECK-LABEL: sil private [thunk] @$sSo9TestClassC4testE12callHandler1yyyyXEFTo :
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// CHECK-NOT: copy_block
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// CHECK: apply %0
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// CHECK-NOT: destroy_value
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// CHECK: } // end sil function '$sSo9TestClassC4testE12callHandler1yyyyXEFTo'
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func callHandler1(_ handler: () -> Void) {
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handler()
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}
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// CHECK-LABEL: sil private [thunk] @$sSo9TestClassC4testE12callHandler2yyyyXEFTo :
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// CHECK-NOT: copy_block
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// CHECK: } // end sil function '$sSo9TestClassC4testE12callHandler2yyyyXEFTo'
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func callHandler2(_ handler: () -> Void) {
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callee(handler)
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}
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// CHECK-LABEL: sil private [thunk] @$sSo9TestClassC4testE12callHandler3yyyyXEFTo :
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// CHECK-NOT: copy_block
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// CHECK: } // end sil function '$sSo9TestClassC4testE12callHandler3yyyyXEFTo'
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func callHandler3(_ handler: () -> Void) {
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callClosure {
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handler()
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}
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}
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}
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@_silgen_name("callee")
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func callee(_ handler: () -> Void)
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@_silgen_name("callClosure")
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func callClosure(_ closure: () -> ())
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