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llvm-mirror/test/Transforms/ObjCARC/cfg-hazards.ll
Duncan P. N. Exon Smith 9c5542c040 IR: Make metadata typeless in assembly 
Now that `Metadata` is typeless, reflect that in the assembly.  These
are the matching assembly changes for the metadata/value split in
r223802.

  - Only use the `metadata` type when referencing metadata from a call
    intrinsic -- i.e., only when it's used as a `Value`.

  - Stop pretending that `ValueAsMetadata` is wrapped in an `MDNode`
    when referencing it from call intrinsics.

So, assembly like this:

    define @foo(i32 %v) {
      call void @llvm.foo(metadata !{i32 %v}, metadata !0)
      call void @llvm.foo(metadata !{i32 7}, metadata !0)
      call void @llvm.foo(metadata !1, metadata !0)
      call void @llvm.foo(metadata !3, metadata !0)
      call void @llvm.foo(metadata !{metadata !3}, metadata !0)
      ret void, !bar !2
    }
    !0 = metadata !{metadata !2}
    !1 = metadata !{i32* @global}
    !2 = metadata !{metadata !3}
    !3 = metadata !{}

turns into this:

    define @foo(i32 %v) {
      call void @llvm.foo(metadata i32 %v, metadata !0)
      call void @llvm.foo(metadata i32 7, metadata !0)
      call void @llvm.foo(metadata i32* @global, metadata !0)
      call void @llvm.foo(metadata !3, metadata !0)
      call void @llvm.foo(metadata !{!3}, metadata !0)
      ret void, !bar !2
    }
    !0 = !{!2}
    !1 = !{i32* @global}
    !2 = !{!3}
    !3 = !{}

I wrote an upgrade script that handled almost all of the tests in llvm
and many of the tests in cfe (even handling many `CHECK` lines).  I've
attached it (or will attach it in a moment if you're speedy) to PR21532
to help everyone update their out-of-tree testcases.

This is part of PR21532.

llvm-svn: 224257
2014-12-15 19:07:53 +00:00

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