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922244c634
the optimizer doesn't eliminate objc_retainBlock calls which are needed for their side effect of copying blocks onto the heap. This implements rdar://10361249. llvm-svn: 148076
139 lines
5.1 KiB
LLVM
139 lines
5.1 KiB
LLVM
; RUN: opt -objc-arc -S < %s | FileCheck %s
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target datalayout = "e-p:64:64:64"
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!0 = metadata !{}
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declare i8* @objc_retain(i8*)
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declare void @callee(i8)
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declare void @use_pointer(i8*)
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declare void @objc_release(i8*)
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declare i8* @objc_retainBlock(i8*)
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declare i8* @objc_autorelease(i8*)
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; Basic retainBlock+release elimination.
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; CHECK: define void @test0(i8* %tmp) {
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; CHECK-NOT: @objc
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; CHECK: }
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define void @test0(i8* %tmp) {
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entry:
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%tmp2 = tail call i8* @objc_retainBlock(i8* %tmp) nounwind, !clang.arc.copy_on_escape !0
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tail call void @use_pointer(i8* %tmp2)
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tail call void @objc_release(i8* %tmp2) nounwind, !clang.imprecise_release !0
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ret void
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}
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; Same as test0, but there's no copy_on_escape metadata, so there's no
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; optimization possible.
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; CHECK: define void @test0_no_metadata(i8* %tmp) {
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; CHECK: %tmp2 = tail call i8* @objc_retainBlock(i8* %tmp) nounwind
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; CHECK: tail call void @objc_release(i8* %tmp2) nounwind, !clang.imprecise_release !0
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; CHECK: }
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define void @test0_no_metadata(i8* %tmp) {
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entry:
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%tmp2 = tail call i8* @objc_retainBlock(i8* %tmp) nounwind
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tail call void @use_pointer(i8* %tmp2)
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tail call void @objc_release(i8* %tmp2) nounwind, !clang.imprecise_release !0
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ret void
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}
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; Same as test0, but the pointer escapes, so there's no
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; optimization possible.
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; CHECK: define void @test0_escape(i8* %tmp, i8** %z) {
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; CHECK: %tmp2 = tail call i8* @objc_retainBlock(i8* %tmp) nounwind, !clang.arc.copy_on_escape !0
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; CHECK: tail call void @objc_release(i8* %tmp2) nounwind, !clang.imprecise_release !0
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; CHECK: }
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define void @test0_escape(i8* %tmp, i8** %z) {
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entry:
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%tmp2 = tail call i8* @objc_retainBlock(i8* %tmp) nounwind, !clang.arc.copy_on_escape !0
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store i8* %tmp2, i8** %z
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tail call void @use_pointer(i8* %tmp2)
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tail call void @objc_release(i8* %tmp2) nounwind, !clang.imprecise_release !0
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ret void
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}
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; Same as test0_escape, but there's no intervening call.
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; CHECK: define void @test0_just_escape(i8* %tmp, i8** %z) {
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; CHECK: %tmp2 = tail call i8* @objc_retainBlock(i8* %tmp) nounwind, !clang.arc.copy_on_escape !0
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; CHECK: tail call void @objc_release(i8* %tmp2) nounwind, !clang.imprecise_release !0
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; CHECK: }
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define void @test0_just_escape(i8* %tmp, i8** %z) {
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entry:
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%tmp2 = tail call i8* @objc_retainBlock(i8* %tmp) nounwind, !clang.arc.copy_on_escape !0
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store i8* %tmp2, i8** %z
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tail call void @objc_release(i8* %tmp2) nounwind, !clang.imprecise_release !0
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ret void
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}
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; Basic nested retainBlock+release elimination.
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; CHECK: define void @test1(i8* %tmp) {
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; CHECK-NOT: @objc
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; CHECK: tail call i8* @objc_retain(i8* %tmp) nounwind
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; CHECK-NOT: @objc
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; CHECK: tail call void @objc_release(i8* %tmp) nounwind, !clang.imprecise_release !0
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; CHECK-NOT: @objc
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; CHECK: }
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define void @test1(i8* %tmp) {
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entry:
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%tmp1 = tail call i8* @objc_retain(i8* %tmp) nounwind
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%tmp2 = tail call i8* @objc_retainBlock(i8* %tmp) nounwind, !clang.arc.copy_on_escape !0
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tail call void @use_pointer(i8* %tmp2)
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tail call void @use_pointer(i8* %tmp2)
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tail call void @objc_release(i8* %tmp2) nounwind, !clang.imprecise_release !0
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tail call void @objc_release(i8* %tmp) nounwind, !clang.imprecise_release !0
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ret void
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}
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; Same as test1, but there's no copy_on_escape metadata, so there's no
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; retainBlock+release optimization possible. But we can still eliminate
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; the outer retain+release.
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; CHECK: define void @test1_no_metadata(i8* %tmp) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: tail call i8* @objc_retainBlock(i8* %tmp) nounwind
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; CHECK-NEXT: @use_pointer(i8* %tmp2)
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; CHECK-NEXT: @use_pointer(i8* %tmp2)
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; CHECK-NEXT: tail call void @objc_release(i8* %tmp) nounwind, !clang.imprecise_release !0
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; CHECK-NOT: @objc
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; CHECK: }
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define void @test1_no_metadata(i8* %tmp) {
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entry:
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%tmp1 = tail call i8* @objc_retain(i8* %tmp) nounwind
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%tmp2 = tail call i8* @objc_retainBlock(i8* %tmp) nounwind
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tail call void @use_pointer(i8* %tmp2)
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tail call void @use_pointer(i8* %tmp2)
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tail call void @objc_release(i8* %tmp2) nounwind, !clang.imprecise_release !0
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tail call void @objc_release(i8* %tmp) nounwind, !clang.imprecise_release !0
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ret void
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}
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; Same as test1, but the pointer escapes, so there's no
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; retainBlock+release optimization possible. But we can still eliminate
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; the outer retain+release
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; CHECK: define void @test1_escape(i8* %tmp, i8** %z) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: %tmp2 = tail call i8* @objc_retainBlock(i8* %tmp) nounwind, !clang.arc.copy_on_escape !0
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; CHECK-NEXT: store i8* %tmp2, i8** %z
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; CHECK-NEXT: @use_pointer(i8* %tmp2)
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; CHECK-NEXT: @use_pointer(i8* %tmp2)
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; CHECK-NEXT: tail call void @objc_release(i8* %tmp) nounwind, !clang.imprecise_release !0
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; CHECK-NOT: @objc
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; CHECK: }
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define void @test1_escape(i8* %tmp, i8** %z) {
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entry:
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%tmp1 = tail call i8* @objc_retain(i8* %tmp) nounwind
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%tmp2 = tail call i8* @objc_retainBlock(i8* %tmp) nounwind, !clang.arc.copy_on_escape !0
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store i8* %tmp2, i8** %z
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tail call void @use_pointer(i8* %tmp2)
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tail call void @use_pointer(i8* %tmp2)
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tail call void @objc_release(i8* %tmp2) nounwind, !clang.imprecise_release !0
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tail call void @objc_release(i8* %tmp) nounwind, !clang.imprecise_release !0
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ret void
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}
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