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embedded: fix a crash when specializing a generic class method with an indirect return value #73172

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Merged
merged 1 commit into from
Apr 22, 2024
Merged

embedded: fix a crash when specializing a generic class method with an indirect return value #73172

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2 changes: 1 addition & 1 deletion lib/SILOptimizer/Utils/Generics.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -813,7 +813,7 @@ getReturnTypeCategory(const SILResultInfo &RI,
const SILFunctionConventions &substConv,
TypeExpansionContext typeExpansion) {
auto ResultTy = substConv.getSILType(RI, typeExpansion);
ResultTy = Callee->mapTypeIntoContext(ResultTy);
ResultTy = mapTypeIntoContext(ResultTy);
auto &TL = getModule().Types.getTypeLowering(ResultTy, typeExpansion);

if (!TL.isLoadable())
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25 changes: 25 additions & 0 deletions test/embedded/classes-indirect-return.swift
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@@ -0,0 +1,25 @@
// RUN: %target-swift-emit-sil %s -enable-experimental-feature Embedded -wmo | %FileCheck %s

// REQUIRES: swift_in_compiler

// CHECK: sil @$s4main1XC3fooxyFSi_Tg5 : $@convention(method) (@guaranteed X<Int>) -> Int {

// CHECK-LABEL: sil_vtable $X<Int>
// CHECK: #X.foo: <T> (X<T>) -> () -> T : @$s4main1XC3fooxyFSi_Tg5
// CHECK: }

open class X<T> {

var t: T

init(t: T) {
self.t = t
}

open func foo() -> T { t }
}

func testit() -> Int {
let x = X(t: 27)
return x.foo()
}