436 lines
11 KiB
LLVM
436 lines
11 KiB
LLVM
; RUN: opt -S -objc-arc < %s | FileCheck %s
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; rdar://9503416
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; Detect loop boundaries and don't move retains and releases
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; across them.
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declare void @use_pointer(i8*)
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declare i8* @objc_retain(i8*)
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declare void @objc_release(i8*)
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declare void @callee()
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declare void @block_callee(void ()*)
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; CHECK-LABEL: define void @test0(
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; CHECK: call i8* @objc_retain(
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; CHECK: for.body:
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; CHECK-NOT: @objc
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; CHECK: for.end:
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; CHECK: call void @objc_release(
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; CHECK: }
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define void @test0(i8* %digits) {
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entry:
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%tmp1 = call i8* @objc_retain(i8* %digits) nounwind
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call void @use_pointer(i8* %digits)
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%upcDigitIndex.01 = phi i64 [ 2, %entry ], [ %inc, %for.body ]
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call void @use_pointer(i8* %digits)
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%inc = add i64 %upcDigitIndex.01, 1
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%cmp = icmp ult i64 %inc, 12
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br i1 %cmp, label %for.body, label %for.end
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for.end: ; preds = %for.body
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call void @objc_release(i8* %digits) nounwind, !clang.imprecise_release !0
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ret void
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}
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; CHECK-LABEL: define void @test1(
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; CHECK: call i8* @objc_retain(
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; CHECK: for.body:
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; CHECK-NOT: @objc
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; CHECK: for.end:
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; CHECK: void @objc_release(
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; CHECK: }
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define void @test1(i8* %digits) {
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entry:
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%tmp1 = call i8* @objc_retain(i8* %digits) nounwind
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%upcDigitIndex.01 = phi i64 [ 2, %entry ], [ %inc, %for.body ]
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call void @use_pointer(i8* %digits)
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call void @use_pointer(i8* %digits)
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%inc = add i64 %upcDigitIndex.01, 1
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%cmp = icmp ult i64 %inc, 12
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br i1 %cmp, label %for.body, label %for.end
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for.end: ; preds = %for.body
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call void @objc_release(i8* %digits) nounwind, !clang.imprecise_release !0
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ret void
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}
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; CHECK-LABEL: define void @test2(
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; CHECK: call i8* @objc_retain(
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; CHECK: for.body:
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; CHECK-NOT: @objc
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; CHECK: for.end:
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; CHECK: void @objc_release(
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; CHECK: }
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define void @test2(i8* %digits) {
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entry:
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%tmp1 = call i8* @objc_retain(i8* %digits) nounwind
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%upcDigitIndex.01 = phi i64 [ 2, %entry ], [ %inc, %for.body ]
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call void @use_pointer(i8* %digits)
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%inc = add i64 %upcDigitIndex.01, 1
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%cmp = icmp ult i64 %inc, 12
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br i1 %cmp, label %for.body, label %for.end
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for.end: ; preds = %for.body
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call void @use_pointer(i8* %digits)
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call void @objc_release(i8* %digits) nounwind, !clang.imprecise_release !0
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ret void
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}
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; Delete nested retain+release pairs around loops.
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; CHECK: define void @test3(i8* %a) #0 {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: tail call i8* @objc_retain(i8* %a) [[NUW:#[0-9]+]]
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; CHECK-NEXT: br label %loop
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; CHECK-NOT: @objc_
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; CHECK: exit:
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; CHECK-NEXT: call void @objc_release(i8* %a)
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; CHECK-NEXT: ret void
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; CHECK-NEXT: }
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define void @test3(i8* %a) nounwind {
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entry:
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%outer = call i8* @objc_retain(i8* %a) nounwind
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%inner = call i8* @objc_retain(i8* %a) nounwind
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br label %loop
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loop:
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call void @callee()
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store i8 0, i8* %a
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br i1 undef, label %loop, label %exit
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exit:
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call void @objc_release(i8* %a) nounwind
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call void @objc_release(i8* %a) nounwind, !clang.imprecise_release !0
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ret void
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}
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; CHECK: define void @test4(i8* %a) #0 {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: tail call i8* @objc_retain(i8* %a) [[NUW]]
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; CHECK-NEXT: br label %loop
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; CHECK-NOT: @objc_
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; CHECK: exit:
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; CHECK-NEXT: call void @objc_release(i8* %a)
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; CHECK-NEXT: ret void
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; CHECK-NEXT: }
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define void @test4(i8* %a) nounwind {
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entry:
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%outer = call i8* @objc_retain(i8* %a) nounwind
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%inner = call i8* @objc_retain(i8* %a) nounwind
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br label %loop
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loop:
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br label %more
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more:
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call void @callee()
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call void @callee()
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store i8 0, i8* %a
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br i1 undef, label %loop, label %exit
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exit:
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call void @objc_release(i8* %a) nounwind
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call void @objc_release(i8* %a) nounwind, !clang.imprecise_release !0
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ret void
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}
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; CHECK: define void @test5(i8* %a) #0 {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: tail call i8* @objc_retain(i8* %a) [[NUW]]
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; CHECK-NEXT: call void @callee()
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; CHECK-NEXT: br label %loop
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; CHECK-NOT: @objc_
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; CHECK: exit:
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; CHECK-NEXT: call void @use_pointer(i8* %a)
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; CHECK-NEXT: call void @objc_release(i8* %a)
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; CHECK-NEXT: ret void
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; CHECK-NEXT: }
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define void @test5(i8* %a) nounwind {
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entry:
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%outer = tail call i8* @objc_retain(i8* %a) nounwind
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%inner = tail call i8* @objc_retain(i8* %a) nounwind
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call void @callee()
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br label %loop
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loop:
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br i1 undef, label %true, label %more
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true:
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br label %more
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more:
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br i1 undef, label %exit, label %loop
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exit:
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call void @use_pointer(i8* %a)
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call void @objc_release(i8* %a) nounwind
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call void @objc_release(i8* %a) nounwind, !clang.imprecise_release !0
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ret void
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}
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; CHECK: define void @test6(i8* %a) #0 {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: tail call i8* @objc_retain(i8* %a) [[NUW]]
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; CHECK-NEXT: br label %loop
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; CHECK-NOT: @objc_
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; CHECK: exit:
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; CHECK-NEXT: call void @use_pointer(i8* %a)
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; CHECK-NEXT: call void @objc_release(i8* %a)
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; CHECK-NEXT: ret void
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; CHECK-NEXT: }
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define void @test6(i8* %a) nounwind {
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entry:
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%outer = tail call i8* @objc_retain(i8* %a) nounwind
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%inner = tail call i8* @objc_retain(i8* %a) nounwind
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br label %loop
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loop:
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br i1 undef, label %true, label %more
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true:
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call void @callee()
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br label %more
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more:
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br i1 undef, label %exit, label %loop
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exit:
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call void @use_pointer(i8* %a)
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call void @objc_release(i8* %a) nounwind
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call void @objc_release(i8* %a) nounwind, !clang.imprecise_release !0
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ret void
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}
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; CHECK: define void @test7(i8* %a) #0 {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: tail call i8* @objc_retain(i8* %a) [[NUW]]
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; CHECK-NEXT: call void @callee()
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; CHECK-NEXT: br label %loop
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; CHECK-NOT: @objc_
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; CHECK: exit:
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; CHECK-NEXT: call void @objc_release(i8* %a)
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; CHECK-NEXT: ret void
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; CHECK-NEXT: }
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define void @test7(i8* %a) nounwind {
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entry:
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%outer = tail call i8* @objc_retain(i8* %a) nounwind
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%inner = tail call i8* @objc_retain(i8* %a) nounwind
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call void @callee()
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br label %loop
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loop:
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br i1 undef, label %true, label %more
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true:
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call void @use_pointer(i8* %a)
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br label %more
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more:
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br i1 undef, label %exit, label %loop
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exit:
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call void @objc_release(i8* %a) nounwind
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call void @objc_release(i8* %a) nounwind, !clang.imprecise_release !0
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ret void
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}
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; CHECK: define void @test8(i8* %a) #0 {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: tail call i8* @objc_retain(i8* %a) [[NUW]]
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; CHECK-NEXT: br label %loop
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; CHECK-NOT: @objc_
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; CHECK: exit:
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; CHECK-NEXT: call void @objc_release(i8* %a)
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; CHECK-NEXT: ret void
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; CHECK-NEXT: }
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define void @test8(i8* %a) nounwind {
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entry:
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%outer = tail call i8* @objc_retain(i8* %a) nounwind
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%inner = tail call i8* @objc_retain(i8* %a) nounwind
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br label %loop
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loop:
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br i1 undef, label %true, label %more
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true:
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call void @callee()
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call void @use_pointer(i8* %a)
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br label %more
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more:
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br i1 undef, label %exit, label %loop
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exit:
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call void @objc_release(i8* %a) nounwind
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call void @objc_release(i8* %a) nounwind, !clang.imprecise_release !0
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ret void
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}
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; CHECK: define void @test9(i8* %a) #0 {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label %loop
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; CHECK-NOT: @objc_
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; CHECK: exit:
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; CHECK-NEXT: ret void
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; CHECK-NEXT: }
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define void @test9(i8* %a) nounwind {
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entry:
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%outer = tail call i8* @objc_retain(i8* %a) nounwind
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%inner = tail call i8* @objc_retain(i8* %a) nounwind
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br label %loop
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loop:
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br i1 undef, label %true, label %more
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true:
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call void @use_pointer(i8* %a)
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br label %more
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more:
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br i1 undef, label %exit, label %loop
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exit:
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call void @objc_release(i8* %a) nounwind
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call void @objc_release(i8* %a) nounwind, !clang.imprecise_release !0
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ret void
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}
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; CHECK: define void @test10(i8* %a) #0 {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label %loop
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; CHECK-NOT: @objc_
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; CHECK: exit:
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; CHECK-NEXT: ret void
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; CHECK-NEXT: }
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define void @test10(i8* %a) nounwind {
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entry:
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%outer = tail call i8* @objc_retain(i8* %a) nounwind
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%inner = tail call i8* @objc_retain(i8* %a) nounwind
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br label %loop
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loop:
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br i1 undef, label %true, label %more
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true:
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call void @callee()
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br label %more
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more:
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br i1 undef, label %exit, label %loop
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exit:
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call void @objc_release(i8* %a) nounwind
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call void @objc_release(i8* %a) nounwind, !clang.imprecise_release !0
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ret void
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}
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; CHECK: define void @test11(i8* %a) #0 {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label %loop
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; CHECK-NOT: @objc_
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; CHECK: exit:
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; CHECK-NEXT: ret void
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; CHECK-NEXT: }
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define void @test11(i8* %a) nounwind {
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entry:
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%outer = tail call i8* @objc_retain(i8* %a) nounwind
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%inner = tail call i8* @objc_retain(i8* %a) nounwind
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br label %loop
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loop:
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br i1 undef, label %true, label %more
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true:
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br label %more
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more:
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br i1 undef, label %exit, label %loop
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exit:
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call void @objc_release(i8* %a) nounwind
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call void @objc_release(i8* %a) nounwind, !clang.imprecise_release !0
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ret void
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}
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; Don't delete anything if they're not balanced.
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; CHECK: define void @test12(i8* %a) #0 {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: %outer = tail call i8* @objc_retain(i8* %a) [[NUW]]
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; CHECK-NEXT: %inner = tail call i8* @objc_retain(i8* %a) [[NUW]]
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; CHECK-NEXT: br label %loop
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; CHECK-NOT: @objc_
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; CHECK: exit:
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; CHECK-NEXT: call void @objc_release(i8* %a) [[NUW]]
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; CHECK-NEXT: call void @objc_release(i8* %a) [[NUW]], !clang.imprecise_release !0
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; CHECK-NEXT: ret void
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; CHECK-NEXT: }
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define void @test12(i8* %a) nounwind {
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entry:
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%outer = tail call i8* @objc_retain(i8* %a) nounwind
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%inner = tail call i8* @objc_retain(i8* %a) nounwind
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br label %loop
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loop:
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br i1 undef, label %true, label %more
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true:
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ret void
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more:
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br i1 undef, label %exit, label %loop
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exit:
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call void @objc_release(i8* %a) nounwind
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call void @objc_release(i8* %a) nounwind, !clang.imprecise_release !0
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ret void
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}
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; Do not improperly pair retains in a for loop with releases outside of a for
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; loop when the proper pairing is disguised by a separate provenance represented
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; by an alloca.
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; rdar://12969722
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; CHECK: define void @test13(i8* %a) [[NUW]] {
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; CHECK: entry:
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; CHECK: tail call i8* @objc_retain(i8* %a) [[NUW]]
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; CHECK: loop:
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; CHECK: tail call i8* @objc_retain(i8* %a) [[NUW]]
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; CHECK: call void @block_callee
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; CHECK: call void @objc_release(i8* %reloaded_a) [[NUW]]
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; CHECK: exit:
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; CHECK: call void @objc_release(i8* %a) [[NUW]]
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; CHECK: }
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define void @test13(i8* %a) nounwind {
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entry:
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%block = alloca i8*
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%a1 = tail call i8* @objc_retain(i8* %a) nounwind
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br label %loop
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loop:
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%a2 = tail call i8* @objc_retain(i8* %a) nounwind
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store i8* %a, i8** %block, align 8
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%casted_block = bitcast i8** %block to void ()*
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call void @block_callee(void ()* %casted_block)
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%reloaded_a = load i8*, i8** %block, align 8
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call void @objc_release(i8* %reloaded_a) nounwind, !clang.imprecise_release !0
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br i1 undef, label %loop, label %exit
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exit:
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call void @objc_release(i8* %a) nounwind, !clang.imprecise_release !0
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ret void
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}
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; CHECK: attributes [[NUW]] = { nounwind }
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!0 = !{}
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