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[ClosureSpecializer] Don't release trivial noescape apply argument twice. #66275

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Merged
merged 1 commit into from
Jun 1, 2023
Merged

[ClosureSpecializer] Don't release trivial noescape apply argument twice. #66275

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3 changes: 2 additions & 1 deletion lib/SILOptimizer/IPO/ClosureSpecializer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -482,7 +482,8 @@ static void rewriteApplyInst(const CallSiteDescriptor &CSDesc,
// If we passed in the original closure as @owned, then insert a release
// right after NewAI. This is to balance the +1 from being an @owned
// argument to AI.
if (CSDesc.isClosureConsumed() && CSDesc.closureHasRefSemanticContext())
if (CSDesc.isClosureConsumed() && !CSDesc.isTrivialNoEscapeParameter() &&
CSDesc.closureHasRefSemanticContext())
Builder.createReleaseValue(Closure->getLoc(), Closure,
Builder.getDefaultAtomicity());

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45 changes: 45 additions & 0 deletions test/SILOptimizer/closure_specialize.sil
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Expand Up @@ -702,6 +702,51 @@ bb0(%0 : $Int):
return %empty : $()
}

sil @testClosureConvertHelper3 : $@convention(thin) (Int) -> Int
sil [reabstraction_thunk] @reabstractionThunk3 : $@convention(thin) (@noescape @callee_guaranteed () -> Int) -> @out Int

sil @testClosureThunkNoEscape3 : $@convention(thin) (@owned @noescape @callee_guaranteed @substituted <τ_0_0> () -> @out τ_0_0 for <Int>) -> @out () {
entry(%empty : $*(), %closure : $@noescape @callee_guaranteed @substituted <τ_0_0> () -> @out τ_0_0 for <Int>):
%out = alloc_stack $Int
%ret = apply %closure(%out) : $@noescape @callee_guaranteed @substituted <τ_0_0> () -> @out τ_0_0 for <Int>
dealloc_stack %out : $*Int
store %ret to %empty : $*()
%retval = tuple ()
return %retval : $()
}

// CHECK-LABEL: sil @reabstractionTest4 {{.*}} {
// CHECK: [[HELPER:%[^,]+]] = function_ref @testClosureConvertHelper3
// CHECK: [[SPECIALIZATION:%[^,]+]] = function_ref @$s25testClosureThunkNoEscape30aB14ConvertHelper3SiTf1nc_n
// CHECK: [[CLOSURE:%[^,]+]] = partial_apply [callee_guaranteed] [[HELPER]]
// CHECK: [[NOESCAPE_CLOSURE:%[^,]+]] = convert_escape_to_noescape [[CLOSURE]]
// CHECK: apply [[SPECIALIZATION]]{{.*}}
// CHECK: release_value [[CLOSURE]]
// CHECK-NOT: release_value [[CLOSURE]]
// CHECK: strong_release [[NOESCAPE_CLOSURE]]
// CHECK-LABEL: } // end sil function 'reabstractionTest4'
sil @reabstractionTest4 : $(Int) -> () {
bb0(%value : $Int):
%testThrowingClosureConvertHelper = function_ref @testClosureConvertHelper3 : $@convention(thin) (Int) -> Int
%closure = partial_apply [callee_guaranteed] %testThrowingClosureConvertHelper(%value) : $@convention(thin) (Int) -> Int
%noescapeClosure = convert_escape_to_noescape %closure : $@callee_guaranteed () -> Int to $@noescape @callee_guaranteed () -> Int
%thunk = function_ref @reabstractionThunk3 : $@convention(thin) (@noescape @callee_guaranteed () -> Int) -> @out Int
%appliedThunk = partial_apply [callee_guaranteed] [on_stack] %thunk(%noescapeClosure) : $@convention(thin) (@noescape @callee_guaranteed () -> Int) -> @out Int

%dependency = mark_dependence %appliedThunk : $@noescape @callee_guaranteed () -> @out Int on %noescapeClosure : $@noescape @callee_guaranteed () -> Int
%generified = convert_function %dependency : $@noescape @callee_guaranteed () -> @out Int to $@noescape @callee_guaranteed @substituted <τ_0_0> () -> @out τ_0_0 for <Int>
%test = function_ref @testClosureThunkNoEscape3 : $@convention(thin) (@owned @noescape @callee_guaranteed @substituted <τ_0_0> () -> @out τ_0_0 for <Int>) -> @out ()
strong_retain %generified : $@noescape @callee_guaranteed @substituted <τ_0_0> () -> @out τ_0_0 for <Int>
%out = alloc_stack $()
%ret = apply %test(%out, %generified) : $@convention(thin) (@owned @noescape @callee_guaranteed @substituted <τ_0_0> () -> @out τ_0_0 for <Int>) -> @out ()
dealloc_stack %out : $*()
release_value %closure : $@callee_guaranteed () -> Int
strong_release %noescapeClosure : $@noescape @callee_guaranteed () -> Int
dealloc_stack %appliedThunk : $@noescape @callee_guaranteed () -> @out Int
%empty = tuple ()
return %empty : $()
}

sil @testThrowingClosureConvertHelper : $@convention(thin) (Int) -> (Int, @error any Error)
sil [reabstraction_thunk] @reabstractionThunkThrowing : $@convention(thin) (@noescape @callee_guaranteed () -> (Int, @error any Error)) -> (@out Int, @error any Error)

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