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// RUN: %target-sil-opt -enable-sil-verify-all -enable-loop-arc=0 -arc-sequence-opts %s | %FileCheck %s
// RUN: %target-sil-opt -enable-sil-verify-all -enable-loop-arc=1 -arc-sequence-opts %s | %FileCheck %s
import Builtin
import Swift
import SwiftShims
class MD5 {
init()
final var w: [UInt32]
}
// CHECK-LABEL:sil @test_unique_check_arc : $@convention(method) (@owned MD5) -> ()
sil @test_unique_check_arc : $@convention(method) (@owned MD5) -> () {
// CHECK: bb0
bb0(%0 : $MD5):
%1 = integer_literal $Builtin.Int32, 0
%2 = integer_literal $Builtin.Int32, 16
%3 = struct $Int32 (%1 : $Builtin.Int32)
br bb1(%1 : $Builtin.Int32)
// CHECK: bb1
bb1(%5 : $Builtin.Int32):
%7 = builtin "cmp_eq_Int32"(%5 : $Builtin.Int32, %2 : $Builtin.Int32) : $Builtin.Int1
cond_br %7, bb3, bb2
// CHECK: bb2
bb2:
%9 = integer_literal $Builtin.Int32, 1
%11 = integer_literal $Builtin.Int1, -1
%12 = builtin "sadd_with_overflow_Int32"(%5 : $Builtin.Int32, %9 : $Builtin.Int32, %11 : $Builtin.Int1) : $(Builtin.Int32, Builtin.Int1)
%13 = tuple_extract %12 : $(Builtin.Int32, Builtin.Int1), 0
// CHECK-NOT: strong_retain
// CHECK-NOT: strong_release
strong_retain %0 : $MD5
%314 = ref_element_addr %0 : $MD5, #MD5.w
%318 = load %314 : $*Array<UInt32>
%319 = alloc_stack $Array<UInt32>
store %318 to %319 : $*Array<UInt32>
dealloc_stack %319 : $*Array<UInt32>
%179 = is_unique %314 : $*Array<UInt32>
cond_br %179, bb4, bb5
// CHECK: bb3
// CHECK-NEXT: strong_release
// CHECK-NEXT: tuple
// CHECK-NEXT: return
bb3:
strong_release %0 : $MD5
%273 = tuple ()
return %273 : $()
bb4:
br bb6
bb5:
br bb6
// CHECK-NOT: strong_release
bb6:
strong_release %0 : $MD5
br bb1(%13 : $Builtin.Int32)
}
class C {}
// Check that retains are not moved across an is_unique that may alias.
sil @test_uniq_alias : $@convention(method) (@owned C) -> Builtin.Int1 {
// CHECK: bb0
bb0(%0 : $C):
%1 = alloc_stack $C, var, name "x"
store %0 to %1 : $*C
// CHECK: strong_retain %0 : $C
strong_retain %0 : $C
// CHECK: is_unique %1 : $*C
%4 = is_unique %1 : $*C
// CHECK-NOT: strong_retain
fix_lifetime %0 : $C
// CHECK: strong_release %0 : $C
strong_release %0 : $C
// CHECK: [[LOADED:%[0-9]+]] = load %1 : $*C
%8 = load %1 : $*C
// CHECK: strong_release [[LOADED]] : $C
strong_release %8 : $C
dealloc_stack %1 : $*C
return %4 : $Builtin.Int1
}
// The following test could optimize to:
// %2 = load %1 : $*C // user: %4
// %3 = is_unique %0 : $*C // user: %5
// fix_lifetime %2 : $C // id: %4
//
// But ARC is currently conservative. When this is fixed,
// change _CHECK: strong... into _CHECK_NOT: strong...
sil @test_uniq_noalias : $@convention(thin) (@inout C, @inout C) -> Builtin.Int1 {
// CHECK: bb0
bb0(%0 : $*C, %1 : $*C):
%2 = load %1 : $*C
// CHECK: strong_retain %2 : $C
strong_retain %2 : $C
// CHECK: is_unique %0 : $*C
%4 = is_unique %0 : $*C
fix_lifetime %2 : $C
// CHECK: strong_release %2 : $C
strong_release %2 : $C
return %4 : $Builtin.Int1
}
// Similarly, do not remove a retain/release pair that spans an
// is_escaping_closure instruction. This would fail to catch closures
// that are returned from the function.
// <rdar://problem/52803634>
// thunk for @callee_guaranteed () -> ()
sil shared [transparent] [serialized] [reabstraction_thunk] [without_actually_escaping] @$sIg_Ieg_TR : $@convention(thin) (@noescape @callee_guaranteed () -> ()) -> () {
bb0(%0 : $@noescape @callee_guaranteed () -> ()):
%1 = apply %0() : $@noescape @callee_guaranteed () -> ()
return %1 : $()
}
sil hidden [noinline] @testEscapingClosure : $@convention(thin) (@noescape @callee_guaranteed () -> ()) -> @owned @callee_guaranteed () -> () {
bb0(%0 : $@noescape @callee_guaranteed () -> ()):
%1 = function_ref @$sIg_Ieg_TR : $@convention(thin) (@noescape @callee_guaranteed () -> ()) -> ()
%2 = partial_apply [callee_guaranteed] %1(%0) : $@convention(thin) (@noescape @callee_guaranteed () -> ()) -> ()
%3 = mark_dependence %2 : $@callee_guaranteed () -> () on %0 : $@noescape @callee_guaranteed () -> ()
strong_retain %3 : $@callee_guaranteed () -> ()
%5 = is_escaping_closure %3 : $@callee_guaranteed () -> ()
strong_release %3 : $@callee_guaranteed () -> ()
cond_fail %5 : $Builtin.Int1
return %3 : $@callee_guaranteed () -> ()
}
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