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[SILGen] NFC: Add test-cases for rdar://problem/37790062 #15187

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Merged
merged 1 commit into from
Mar 13, 2018
Merged

[SILGen] NFC: Add test-cases for rdar://problem/37790062 #15187

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4 changes: 2 additions & 2 deletions lib/Sema/CSBindings.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -381,7 +381,7 @@ ConstraintSystem::getPotentialBindings(TypeVariableType *typeVar) {

if (auto *locator = typeVar->getImpl().getLocator()) {
auto path = locator->getPath();
auto voidType = TupleType::getEmpty(getASTContext());
auto voidType = getASTContext().TheEmptyTupleType;

// If this is a type variable representing closure result,
// which is on the right-side of some relational constraint
Expand All @@ -391,7 +391,7 @@ ConstraintSystem::getPotentialBindings(TypeVariableType *typeVar) {
if (!path.empty() &&
path.back().getKind() == ConstraintLocator::ClosureResult &&
binding->Kind == AllowedBindingKind::Supertypes &&
exactTypes.insert(voidType->getCanonicalType()).second) {
exactTypes.insert(voidType).second) {
result.addPotentialBinding(
{voidType, binding->Kind, constraint->getKind()},
/*allowJoinMeet=*/false);
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64 changes: 64 additions & 0 deletions test/SILGen/closures.swift
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Expand Up @@ -791,3 +791,67 @@ struct r29810997 {

// DI will turn this into a direct capture of the specific stored property.
// CHECK-LABEL: sil hidden @$S8closures16r29810997_helperyS3iXEF : $@convention(thin) (@noescape @callee_guaranteed (Int) -> Int) -> Int

// rdar://problem/37790062

protocol P_37790062 {
associatedtype T
var elt: T { get }
}

func rdar37790062() {
struct S<T> {
init(_ a: () -> T, _ b: () -> T) {}
}

class C1 : P_37790062 {
typealias T = Int
var elt: T { return 42 }
}

class C2 : P_37790062 {
typealias T = (String, Int, Void)
var elt: T { return ("question", 42, ()) }
}

func foo() -> Int { return 42 }
func bar() -> Void {}
func baz() -> (String, Int) { return ("question", 42) }
func bzz<T>(_ a: T) -> T { return a }
func faz<T: P_37790062>(_ a: T) -> T.T { return a.elt }

// CHECK: function_ref @$S8closures12rdar37790062yyFyyXEfU_
// CHECK: function_ref @$S8closures12rdar37790062yyFyyXEfU0_
// CHECK: function_ref @$S8closures12rdar37790062yyF1SL_VyADyxGxyXE_xyXEtcfC
_ = S({ foo() }, { bar() })

// CHECK: function_ref @$S8closures12rdar37790062yyFyyXEfU1_
// CHECK: function_ref @$S8closures12rdar37790062yyFyyXEfU2_
// CHECK: function_ref @$S8closures12rdar37790062yyF1SL_VyADyxGxyXE_xyXEtcfC
_ = S({ baz() }, { bar() })

// CHECK: function_ref @$S8closures12rdar37790062yyFyyXEfU3_
// CHECK: function_ref @$S8closures12rdar37790062yyFyyXEfU4_
// CHECK: function_ref @$S8closures12rdar37790062yyF1SL_VyADyxGxyXE_xyXEtcfC
_ = S({ bzz(("question", 42)) }, { bar() })

// CHECK: function_ref @$S8closures12rdar37790062yyFyyXEfU5_
// CHECK: function_ref @$S8closures12rdar37790062yyFyyXEfU6_
// CHECK: function_ref @$S8closures12rdar37790062yyF1SL_VyADyxGxyXE_xyXEtcfC
_ = S({ bzz(String.self) }, { bar() })

// CHECK: function_ref @$S8closures12rdar37790062yyFyyXEfU7_
// CHECK: function_ref @$S8closures12rdar37790062yyFyyXEfU8_
// CHECK: function_ref @$S8closures12rdar37790062yyF1SL_VyADyxGxyXE_xyXEtcfC
_ = S({ bzz(((), (()))) }, { bar() })

// CHECK: function_ref @$S8closures12rdar37790062yyFyyXEfU9_
// CHECK: function_ref @$S8closures12rdar37790062yyFyyXEfU10_
// CHECK: function_ref @$S8closures12rdar37790062yyF1SL_VyADyxGxyXE_xyXEtcfC
_ = S({ bzz(C1()) }, { bar() })

// CHECK: function_ref @$S8closures12rdar37790062yyFyyXEfU11_
// CHECK: function_ref @$S8closures12rdar37790062yyFyyXEfU12_
// CHECK: function_ref @$S8closures12rdar37790062yyF1SL_VyADyxGxyXE_xyXEtcfC
_ = S({ faz(C2()) }, { bar() })
}