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935686460c
and eliminate dead code. This is meant to be a replacement for the utility: recursivelyDeleteTriviallyDeadInstructions. The new utility performs more aggresive dead-code elimination for ownership SIL. This patch also migrates most non-force-delete uses of recursivelyDeleteTriviallyDeadInstructions to the new utility. and migrates one force-delete use of recursivelyDeleteTriviallyDeadInstructions (in IRGenPrepare) to use the new utility.
84 lines
3.6 KiB
Swift
84 lines
3.6 KiB
Swift
// RUN: %target-swift-frontend -module-name access_marker_mandatory -parse-as-library -Xllvm -sil-full-demangle -emit-sil -Onone -enforce-exclusivity=checked %s | %FileCheck %s
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public struct S {
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var i: Int
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var o: AnyObject
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}
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// CHECK-LABEL: sil [noinline] @$s23access_marker_mandatory5initSyAA1SVSi_yXltF : $@convention(thin) (Int, @guaranteed AnyObject) -> @owned S {
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// CHECK: bb0(%0 : $Int, %1 : $AnyObject):
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// CHECK: [[STK:%.*]] = alloc_stack $S, var, name "s"
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// CHECK: cond_br %{{.*}}, bb1, bb2
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// CHECK: bb1:
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// CHECK: [[WRITE:%.*]] = begin_access [modify] [static] [[STK]] : $*S
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// CHECK: store %{{.*}} to [[WRITE]] : $*S
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// CHECK: end_access [[WRITE]]
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// CHECK: bb2:
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// CHECK: [[WRITE:%.*]] = begin_access [modify] [static] [[STK]] : $*S
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// CHECK: store %{{.*}} to [[WRITE]] : $*S
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// CHECK: end_access [[WRITE]]
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// CHECK: bb3:
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// CHECK: [[READ:%.*]] = begin_access [read] [static] [[STK]] : $*S
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// CHECK: [[RET:%.*]] = load [[READ]] : $*S
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// CHECK: end_access [[READ]]
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// CHECK: destroy_addr [[STK]]
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// CHECK: dealloc_stack [[STK]]
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// CHECK: return [[RET]] : $S
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// CHECK-LABEL: } // end sil function '$s23access_marker_mandatory5initSyAA1SVSi_yXltF'
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@inline(never)
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public func initS(_ x: Int, _ o: AnyObject) -> S {
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var s: S
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if x == 0 {
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s = S(i: 1, o: o)
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} else {
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s = S(i: x, o: o)
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}
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return s
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}
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@inline(never)
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func takeS(_ s: S) {}
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// CHECK-LABEL: sil @$s23access_marker_mandatory14modifyAndReadS1oyyXl_tF : $@convention(thin) (@guaranteed AnyObject) -> () {
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// CHECK: bb0(%0 : $AnyObject):
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// CHECK: [[STK:%.*]] = alloc_stack $S, var, name "s"
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// CHECK: [[FINIT:%.*]] = function_ref @$s23access_marker_mandatory5initSyAA1SVSi_yXltF : $@convention(thin) (Int, @guaranteed AnyObject) -> @owned S
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// CHECK: [[INITS:%.*]] = apply [[FINIT]](%{{.*}}, %0) : $@convention(thin) (Int, @guaranteed AnyObject) -> @owned S
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// CHECK: store [[INITS]] to [[STK]] : $*S
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// CHECK: [[WRITE:%.*]] = begin_access [modify] [static] [[STK]] : $*S
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// CHECK: [[ADDRI:%.*]] = struct_element_addr [[WRITE]] : $*S, #S.i
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// CHECK: store %{{.*}} to [[ADDRI]] : $*Int
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// CHECK: end_access [[WRITE]]
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// CHECK: [[FTAKE:%.*]] = function_ref @$s23access_marker_mandatory5takeSyyAA1SVF : $@convention(thin) (@guaranteed S) -> ()
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// CHECK: apply [[FTAKE]](%{{.*}}) : $@convention(thin) (@guaranteed S) -> ()
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// CHECK-LABEL: } // end sil function '$s23access_marker_mandatory14modifyAndReadS1oyyXl_tF'
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public func modifyAndReadS(o: AnyObject) {
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var s = initS(3, o)
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s.i = 42
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takeS(s)
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}
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// Test capture promotion followed by stack promotion.
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// Access enforcement selection must run after capture promotion
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// so that we never stack promote something with dynamic access.
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// Otherwise, we may try to convert the access to [deinit] which
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// doesn't make sense dynamically.
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//
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// CHECK-LABEL: sil hidden @$s23access_marker_mandatory19captureStackPromoteSiycyF : $@convention(thin) () -> @owned @callee_guaranteed () -> Int {
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// CHECK-LABEL: bb0:
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// CHECK: [[STK:%.*]] = alloc_stack $Int, var, name "x"
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// CHECK: [[WRITE:%.*]] = begin_access [modify] [static] [[STK]] : $*Int
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// CHECK: store %{{.*}} to [[WRITE]] : $*Int
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// CHECK: end_access [[WRITE]] : $*Int
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// CHECK: [[F:%.*]] = function_ref @$s23access_marker_mandatory19captureStackPromoteSiycyFSiycfU_Tf2i_n : $@convention(thin) (Int) -> Int
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// CHECK: [[C:%.*]] = partial_apply [callee_guaranteed] [[F]](%{{.*}}) : $@convention(thin) (Int) -> Int
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// CHECK: dealloc_stack [[STK]] : $*Int
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// CHECK: return [[C]] : $@callee_guaranteed () -> Int
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// CHECK-LABEL: } // end sil function '$s23access_marker_mandatory19captureStackPromoteSiycyF'
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func captureStackPromote() -> () -> Int {
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var x = 1
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x = 2
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let f = { x }
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return f
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}
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