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6.0: [MoveOnly] Call mutating methods on existentials. #74265

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Merged
merged 1 commit into from
Jun 10, 2024
+17 −2
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6.0: [MoveOnly] Call mutating methods on existentials. #74265

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6 changes: 6 additions & 0 deletions lib/SIL/Utils/FieldSensitivePrunedLiveness.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -164,6 +164,12 @@ SubElementOffset::computeForAddress(SILValue projectionDerivedFromRoot,
continue;
}

if (auto *iea =
dyn_cast<InitExistentialAddrInst>(projectionDerivedFromRoot)) {
projectionDerivedFromRoot = iea->getOperand();
continue;
}

if (auto *teai =
dyn_cast<TupleElementAddrInst>(projectionDerivedFromRoot)) {
SILType tupleType = teai->getOperand()->getType();
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13 changes: 11 additions & 2 deletions test/Interpreter/rdar125864434.swift → test/Interpreter/moveonly_existentials.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -7,15 +7,24 @@

protocol Boopable: ~Copyable {
func boop()
mutating func bonk()
}

struct S: ~Copyable, Boopable {
func boop() { print("boop") }
mutating func bonk() { print("hmm") }
}

func check(_ b: borrowing any Boopable & ~Copyable) {
func borrow(_ b: borrowing any Boopable & ~Copyable) {
b.boop()
}

func mutate(_ b: inout any Boopable & ~Copyable) {
b.bonk()
}

// CHECK: boop
check(S())
// CHECK: hmm
borrow(S())
var s = S() as any Boopable & ~Copyable
mutate(&s)