mirror of
https://github.com/apple/swift.git
synced 2025-12-21 12:14:44 +01:00
381 lines
13 KiB
LLVM
381 lines
13 KiB
LLVM
; RUN: %swift-llvm-opt -swift-llvm-arc-optimize %s | %FileCheck %s
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target datalayout = "e-p:64:64:64-S128-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f16:16:16-f32:32:32-f64:64:64-f128:128:128-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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target triple = "x86_64-apple-macosx10.9"
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%swift.refcounted = type { %swift.heapmetadata*, i64 }
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%swift.heapmetadata = type { i64 (%swift.refcounted*)*, i64 (%swift.refcounted*)* }
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%objc_object = type opaque
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%swift.bridge = type opaque
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declare void @swift_unknownRetain(%swift.refcounted*)
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declare void @swift_unknownRelease(%swift.refcounted*)
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declare %objc_object* @objc_retain(%objc_object*)
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declare void @objc_release(%objc_object*)
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declare %swift.refcounted* @swift_allocObject(%swift.heapmetadata* , i64, i64) nounwind
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declare void @swift_release(%swift.refcounted* nocapture)
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declare void @swift_retain(%swift.refcounted* ) nounwind
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declare %swift.bridge* @swift_bridgeObjectRetain(%swift.bridge*)
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declare void @swift_bridgeObjectRelease(%swift.bridge*)
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declare void @swift_retainUnowned(%swift.refcounted*)
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declare void @user(%swift.refcounted *) nounwind
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declare void @user_objc(%objc_object*) nounwind
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declare void @unknown_func()
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define private void @__swift_fixLifetime(%swift.refcounted*) noinline nounwind {
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entry:
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ret void
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}
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; CHECK-LABEL: @trivial_objc_canonicalization(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[RET0:%.+]] = bitcast i8* %O to %objc_object*
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; CHECK-NEXT: [[RET1:%.+]] = tail call %objc_object* @objc_retain(%objc_object* [[RET0:%.+]])
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; CHECK-NEXT: call void @user_objc(%objc_object* [[RET0:%.+]])
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; CHECK-NEXT: ret void
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define void @trivial_objc_canonicalization(i8* %O) {
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entry:
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%0 = bitcast i8* %O to %objc_object*
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%1 = tail call %objc_object* @objc_retain(%objc_object* %0)
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call void @user_objc(%objc_object* %1) nounwind
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ret void
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}
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; CHECK-LABEL: @trivial_retain_release(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: call void @user
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; CHECK-NEXT: ret void
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define void @trivial_retain_release(%swift.refcounted* %P, %objc_object* %O, %swift.bridge * %B) {
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entry:
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tail call void @swift_retain(%swift.refcounted* %P)
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tail call void @swift_release(%swift.refcounted* %P) nounwind
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tail call void @swift_unknownRetain(%swift.refcounted* %P)
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tail call void @swift_unknownRelease(%swift.refcounted* %P)
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tail call %objc_object* @objc_retain(%objc_object* %O)
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tail call void @objc_release(%objc_object* %O)
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%v = tail call %swift.bridge* @swift_bridgeObjectRetain(%swift.bridge* %B)
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tail call void @swift_bridgeObjectRelease(%swift.bridge* %v)
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call void @user(%swift.refcounted* %P) nounwind
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ret void
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}
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; CHECK-LABEL: @trivial_retain_release_with_rcidentity(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[RET0:%.+]] = bitcast %swift.refcounted* %P to %swift.refcounted*
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; CHECK-NEXT: [[RET1:%.+]] = bitcast %swift.refcounted* %P to %swift.refcounted*
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; CHECK-NEXT: [[RET2:%.+]] = bitcast %objc_object* %O to %objc_object*
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; CHECK-NEXT: call void @user
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; CHECK-NEXT: ret void
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define void @trivial_retain_release_with_rcidentity(%swift.refcounted* %P, %objc_object* %O, %swift.bridge * %B) {
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entry:
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tail call void @swift_retain(%swift.refcounted* %P)
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%0 = bitcast %swift.refcounted* %P to %swift.refcounted*
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tail call void @swift_release(%swift.refcounted* %0) nounwind
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tail call void @swift_unknownRetain(%swift.refcounted* %P)
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%1 = bitcast %swift.refcounted* %P to %swift.refcounted*
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tail call void @swift_unknownRelease(%swift.refcounted* %1)
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tail call %objc_object* @objc_retain(%objc_object* %O)
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%3 = bitcast %objc_object* %O to %objc_object*
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tail call void @objc_release(%objc_object* %3)
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call void @user(%swift.refcounted* %P) nounwind
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ret void
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}
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; retain_motion1 - This shows motion of a retain across operations that can't
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; release an object. Release motion can't zap this.
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; CHECK-LABEL: @retain_motion1(
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: store i32
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; CHECK-NEXT: ret void
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define void @retain_motion1(%swift.refcounted* %A) {
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tail call void @swift_retain(%swift.refcounted* %A)
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%B = bitcast %swift.refcounted* %A to i32*
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store i32 42, i32* %B
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tail call void @swift_release(%swift.refcounted* %A) nounwind
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ret void
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}
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; rdar://11583269 - Optimize out objc_retain/release(null)
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; CHECK-LABEL: @objc_retain_release_null(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: ret void
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define void @objc_retain_release_null() {
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entry:
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tail call void @objc_release(%objc_object* null) nounwind
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tail call %objc_object* @objc_retain(%objc_object* null)
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ret void
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}
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; CHECK-LABEL: @swiftunknown_retain_release_null(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: ret void
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define void @swiftunknown_retain_release_null() {
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entry:
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tail call void @swift_unknownRelease(%swift.refcounted* null)
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tail call void @swift_unknownRetain(%swift.refcounted* null) nounwind
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ret void
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}
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; rdar://11583269 - Useless objc_retain/release optimization.
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; CHECK-LABEL: @objc_retain_release_opt(
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; CHECK-NEXT: store i32 42
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; CHECK-NEXT: ret void
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define void @objc_retain_release_opt(%objc_object* %P, i32* %IP) {
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tail call %objc_object* @objc_retain(%objc_object* %P) nounwind
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store i32 42, i32* %IP
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tail call void @objc_release(%objc_object* %P) nounwind
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ret void
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}
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; CHECK-LABEL: define{{( protected)?}} void @swift_fixLifetimeTest
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; CHECK: swift_retain
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; CHECK: swift_fixLifetime
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; CHECK: swift_release
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define void @swift_fixLifetimeTest(%swift.refcounted* %A) {
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tail call void @swift_retain(%swift.refcounted* %A)
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call void @user(%swift.refcounted* %A) nounwind
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call void @__swift_fixLifetime(%swift.refcounted* %A)
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tail call void @swift_release(%swift.refcounted* %A) nounwind
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ret void
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}
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; CHECK-LABEL: @move_retain_across_unknown_retain
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; CHECK-NOT: swift_retain
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; CHECK: swift_unknownRetain
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; CHECK-NOT: swift_release
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; CHECK: ret
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define void @move_retain_across_unknown_retain(%swift.refcounted* %A, %swift.refcounted* %B) {
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tail call void @swift_retain(%swift.refcounted* %A)
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tail call void @swift_unknownRetain(%swift.refcounted* %B)
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tail call void @swift_release(%swift.refcounted* %A) nounwind
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ret void
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}
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; CHECK-LABEL: @move_retain_across_objc_retain
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; CHECK-NOT: swift_retain
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; CHECK: objc_retain
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; CHECK-NOT: swift_release
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; CHECK: ret
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define void @move_retain_across_objc_retain(%swift.refcounted* %A, %objc_object* %B) {
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tail call void @swift_retain(%swift.refcounted* %A)
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tail call %objc_object* @objc_retain(%objc_object* %B)
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tail call void @swift_release(%swift.refcounted* %A) nounwind
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ret void
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}
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; CHECK-LABEL: @move_retain_across_load
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; CHECK-NOT: swift_retain
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; CHECK-NOT: swift_release
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; CHECK: ret
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define i32 @move_retain_across_load(%swift.refcounted* %A, i32* %ptr) {
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tail call void @swift_retain(%swift.refcounted* %A)
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%val = load i32, i32* %ptr
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tail call void @swift_release(%swift.refcounted* %A) nounwind
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ret i32 %val
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}
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; CHECK-LABEL: @move_retain_but_not_release_across_objc_fix_lifetime
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; CHECK: call void @__swift_fixLifetime
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; CHECK-NEXT: tail call void @swift_retain
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; CHECK-NEXT: call void @user
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; CHECK-NEXT: call void @__swift_fixLifetime
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; CHECK-NEXT: call void @swift_release
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; CHECK-NEXT: ret
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define void @move_retain_but_not_release_across_objc_fix_lifetime(%swift.refcounted* %A) {
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tail call void @swift_retain(%swift.refcounted* %A)
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call void @__swift_fixLifetime(%swift.refcounted* %A) nounwind
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call void @user(%swift.refcounted* %A) nounwind
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call void @__swift_fixLifetime(%swift.refcounted* %A) nounwind
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tail call void @swift_release(%swift.refcounted* %A) nounwind
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ret void
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}
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; CHECK-LABEL: @optimize_retain_unowned
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: load
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; CHECK-NEXT: add
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; CHECK-NEXT: load
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; CHECK-NEXT: call void @swift_checkUnowned
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; CHECK-NEXT: ret
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define void @optimize_retain_unowned(%swift.refcounted* %A) {
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tail call void @swift_retainUnowned(%swift.refcounted* %A)
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%value = bitcast %swift.refcounted* %A to i64*
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; loads from the %A and speculatively executable instructions
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%L1 = load i64, i64* %value, align 8
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%R1 = add i64 %L1, 1
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%L2 = load i64, i64* %value, align 8
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tail call void @swift_release(%swift.refcounted* %A)
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ret void
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}
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; CHECK-LABEL: @dont_optimize_retain_unowned
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; CHECK-NEXT: call void @swift_retainUnowned
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: load
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; CHECK-NEXT: load
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; CHECK-NEXT: call void @swift_release
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; CHECK-NEXT: ret
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define void @dont_optimize_retain_unowned(%swift.refcounted* %A) {
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tail call void @swift_retainUnowned(%swift.refcounted* %A)
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%value = bitcast %swift.refcounted* %A to i64**
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%L1 = load i64*, i64** %value, align 8
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; Use of a potential garbage address from a load of %A.
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%L2 = load i64, i64* %L1, align 8
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tail call void @swift_release(%swift.refcounted* %A)
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ret void
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}
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; CHECK-LABEL: @dont_optimize_retain_unowned2
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; CHECK-NEXT: call void @swift_retainUnowned
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; CHECK-NEXT: store
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; CHECK-NEXT: call void @swift_release
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; CHECK-NEXT: ret
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define void @dont_optimize_retain_unowned2(%swift.refcounted* %A, i32* %B) {
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tail call void @swift_retainUnowned(%swift.refcounted* %A)
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; store to an unknown address
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store i32 42, i32* %B
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tail call void @swift_release(%swift.refcounted* %A)
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ret void
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}
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; CHECK-LABEL: @dont_optimize_retain_unowned3
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; CHECK-NEXT: call void @swift_retainUnowned
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; CHECK-NEXT: call void @unknown_func
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; CHECK-NEXT: call void @swift_release
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; CHECK-NEXT: ret
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define void @dont_optimize_retain_unowned3(%swift.refcounted* %A) {
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tail call void @swift_retainUnowned(%swift.refcounted* %A)
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; call of an unknown function
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call void @unknown_func()
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tail call void @swift_release(%swift.refcounted* %A)
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ret void
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}
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; CHECK-LABEL: @dont_optimize_retain_unowned4
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; CHECK-NEXT: call void @swift_retainUnowned
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; CHECK-NEXT: call void @swift_retain
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; CHECK-NEXT: call void @swift_release
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; CHECK-NEXT: ret
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define void @dont_optimize_retain_unowned4(%swift.refcounted* %A, %swift.refcounted* %B) {
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tail call void @swift_retainUnowned(%swift.refcounted* %A)
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; retain of an unknown reference (%B could be equal to %A)
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tail call void @swift_retain(%swift.refcounted* %B)
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tail call void @swift_release(%swift.refcounted* %A)
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ret void
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}
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; CHECK-LABEL: @remove_redundant_check_unowned
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: load
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; CHECK-NEXT: call void @swift_checkUnowned
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; CHECK-NEXT: load
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; CHECK-NEXT: store
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; CHECK-NEXT: load
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; CHECK-NEXT: ret
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define void @remove_redundant_check_unowned(%swift.refcounted* %A, %swift.refcounted* %B, i64* %C) {
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tail call void @swift_retainUnowned(%swift.refcounted* %A)
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%addr = bitcast %swift.refcounted* %A to i64*
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%L1 = load i64, i64* %addr, align 8
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tail call void @swift_release(%swift.refcounted* %A)
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; Instructions which cannot do a release.
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%L2 = load i64, i64* %C, align 8
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store i64 42, i64* %C
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tail call void @swift_retainUnowned(%swift.refcounted* %A)
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%L3 = load i64, i64* %addr, align 8
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tail call void @swift_release(%swift.refcounted* %A)
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ret void
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}
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; CHECK-LABEL: @dont_remove_redundant_check_unowned
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: load
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; CHECK-NEXT: call void @swift_checkUnowned
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; CHECK-NEXT: call void @unknown_func
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; CHECK-NEXT: load
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; CHECK-NEXT: call void @swift_checkUnowned
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; CHECK-NEXT: ret
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define void @dont_remove_redundant_check_unowned(%swift.refcounted* %A, %swift.refcounted* %B, i64* %C) {
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tail call void @swift_retainUnowned(%swift.refcounted* %A)
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%addr = bitcast %swift.refcounted* %A to i64*
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%L1 = load i64, i64* %addr, align 8
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tail call void @swift_release(%swift.refcounted* %A)
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; Could do a release of %A
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call void @unknown_func()
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tail call void @swift_retainUnowned(%swift.refcounted* %A)
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%L3 = load i64, i64* %addr, align 8
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tail call void @swift_release(%swift.refcounted* %A)
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ret void
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}
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; CHECK-LABEL: @unknown_retain_promotion
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; CHECK-NEXT: swift_retain
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; CHECK-NEXT: swift_retain
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; CHECK-NEXT: swift_retain
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; CHECK-NEXT: ret
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define void @unknown_retain_promotion(%swift.refcounted* %A) {
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tail call void @swift_unknownRetain(%swift.refcounted* %A)
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tail call void @swift_unknownRetain(%swift.refcounted* %A)
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tail call void @swift_retain(%swift.refcounted* %A)
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ret void
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}
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; CHECK-LABEL: @unknown_release_promotion
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; CHECK-NEXT: swift_release
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; CHECK-NEXT: swift_release
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; CHECK-NEXT: swift_release
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; CHECK-NEXT: ret
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define void @unknown_release_promotion(%swift.refcounted* %A) {
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tail call void @swift_unknownRelease(%swift.refcounted* %A)
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tail call void @swift_unknownRelease(%swift.refcounted* %A)
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tail call void @swift_release(%swift.refcounted* %A)
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ret void
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}
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; CHECK-LABEL: @unknown_retain_nopromotion
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; CHECK: bb1
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; CHECK-NOT: swift_retain
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; CHECK: ret
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define void @unknown_retain_nopromotion(%swift.refcounted* %A) {
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tail call void @swift_retain(%swift.refcounted* %A)
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br label %bb1
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bb1:
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tail call void @swift_unknownRetain(%swift.refcounted* %A)
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ret void
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}
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!llvm.dbg.cu = !{!1}
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!llvm.module.flags = !{!4}
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!0 = !DILocation(line: 0, scope: !3)
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!1 = distinct !DICompileUnit(language: DW_LANG_Swift, file: !2)
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!2 = !DIFile(filename: "basic.swift", directory: "")
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!3 = distinct !DISubprogram(name: "_", scope: !1, file: !2, type: !DISubroutineType(types: !{}))
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!4 = !{i32 1, !"Debug Info Version", i32 3}
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