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a7d7970e29
This is necessary because we need to model its stack-allocation behavior, although I'm not yet doing that in this patch because StackNesting first needs to be taught to not try to move the deallocation. I'm not convinced that `async let` *should* be doing a stack allocation, but it undoubtedly *is* doing a stack allocation, and until we have an alternative to that, we will need to model it properly.
75 lines
3.2 KiB
Swift
75 lines
3.2 KiB
Swift
// RUN: %target-swift-frontend -Xllvm -sil-print-types -emit-silgen %s -module-name test -swift-version 5 -target %target-swift-5.1-abi-triple -parse-stdlib -sil-verify-all | %FileCheck %s --dump-input always
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// REQUIRES: concurrency
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import Swift
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import _Concurrency
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func getInt() async -> Int { 0 }
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func getString() async -> String { "" }
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func getStringThrowingly() async throws -> String { "" }
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func getIntAndString() async -> (Int, String) { (5, "hello") }
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enum SomeError: Error {
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case boom
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}
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// CHECK-LABEL: sil hidden [ossa] @$s4test0A11AsyncLetIntSiyYaF : $@convention(thin) @async () -> Int
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func testAsyncLetInt() async -> Int {
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// CHECK: [[ASYNC_LET_START:%.*]] = builtin "startAsyncLetWithLocalBuffer"<Int>({{.*}}, [[BUFFER:%[0-9]+]] : $Builtin.RawPointer)
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async let i = await getInt()
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// CHECK: [[ASYNC_LET_GET:%.*]] = function_ref @swift_asyncLet_get
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// CHECK: apply [[ASYNC_LET_GET]]([[ASYNC_LET_START]], [[BUFFER]])
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// CHECK: [[ADDR:%.*]] = pointer_to_address [[BUFFER]] : $Builtin.RawPointer to [strict] [invariant] $*Int
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// CHECK: [[INT_RESULT_VALUE:%.*]] = load [trivial] [[ADDR]] : $*Int
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return await i
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// CHECK: builtin "finishAsyncLet"([[ASYNC_LET_START]] : $Builtin.RawPointer, [[BUFFER]] : $Builtin.RawPointer)
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// CHECK: builtin "endAsyncLetLifetime"([[ASYNC_LET_START]] : $Builtin.RawPointer)
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}
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func testAsyncLetWithThrows(cond: Bool) async throws -> String {
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async let i = await getInt()
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async let s = await getString()
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if cond {
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throw SomeError.boom
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}
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return await s
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}
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// CHECK-LABEL: sil hidden [ossa] @$s4test0A14AsyncLetThrowsSSyYaKF : $@convention(thin) @async () -> (@owned String, @error any Error) {
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func testAsyncLetThrows() async throws -> String {
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async let s = try await getStringThrowingly()
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// CHECK: [[ASYNC_LET_GET_THROWING:%.*]] = function_ref @swift_asyncLet_get_throwing
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// CHECK: try_apply [[ASYNC_LET_GET_THROWING]]
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return try await s
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}
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// CHECK-LABEL: sil hidden [ossa] @$s4test0A14DecomposeAwait4condSiSb_tYaF : $@convention(thin) @async (Bool) -> Int {
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func testDecomposeAwait(cond: Bool) async -> Int {
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// CHECK: [[ASYNC_LET_START:%.*]] = builtin "startAsyncLetWithLocalBuffer"<(Int, String)>({{.*}}, [[BUFFER:%[0-9]+]] : $Builtin.RawPointer)
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async let (i, s) = await getIntAndString()
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if cond {
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// CHECK: [[ASYNC_LET_GET:%.*]] = function_ref @swift_asyncLet_get
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// CHECK: apply [[ASYNC_LET_GET]]([[ASYNC_LET_START]], [[BUFFER]])
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// CHECK: [[ADDR:%.*]] = pointer_to_address [[BUFFER]] : $Builtin.RawPointer to [strict] [invariant] $*(Int, String)
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// CHECK: [[ELT:%.*]] = tuple_element_addr [[ADDR]] : $*(Int, String), 1
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// CHECK: load [copy] [[ELT]] : $*String
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return await Int(s)!
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}
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// CHECK: [[ASYNC_LET_GET:%.*]] = function_ref @swift_asyncLet_get
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// CHECK: apply [[ASYNC_LET_GET]]([[ASYNC_LET_START]], [[BUFFER]])
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// CHECK: [[ADDR:%.*]] = pointer_to_address [[BUFFER]] : $Builtin.RawPointer to [strict] [invariant] $*(Int, String)
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// CHECK: [[ELT:%.*]] = tuple_element_addr [[ADDR]] : $*(Int, String), 0
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// CHECK: load [trivial] [[ELT]] : $*Int
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return await i
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// CHECK: builtin "finishAsyncLet"([[ASYNC_LET_START]] : $Builtin.RawPointer, [[BUFFER]] : $Builtin.RawPointer)
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// CHECK: builtin "endAsyncLetLifetime"([[ASYNC_LET_START]] : $Builtin.RawPointer)
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}
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