1; RUN: opt -objc-arc-contract -S < %s | FileCheck %s
2; rdar://9511608
3
4%0 = type opaque
5%1 = type opaque
6%2 = type { i64, i64 }
7%4 = type opaque
8
9declare %0* @"\01-[NSAttributedString(Terminal) pathAtIndex:effectiveRange:]"(%1*, i8* nocapture, i64, %2*) optsize
10declare i8* @objc_retainAutoreleasedReturnValue(i8*)
11declare i8* @objc_msgSend_fixup(i8*, i8*, ...)
12declare i8* @objc_msgSend(i8*, i8*, ...)
13declare void @objc_release(i8*)
14declare %2 @NSUnionRange(i64, i64, i64, i64) optsize
15declare i8* @objc_autoreleaseReturnValue(i8*)
16declare i8* @objc_autorelease(i8*)
17declare i32 @__gxx_personality_sj0(...)
18
19; Don't get in trouble on bugpointed code.
20
21; CHECK-LABEL: define void @test0(
22define void @test0() {
23bb:
24  %tmp = bitcast %4* undef to i8*
25  %tmp1 = tail call i8* @objc_retainAutoreleasedReturnValue(i8* %tmp) nounwind
26  br label %bb3
27
28bb3:                                              ; preds = %bb2
29  br i1 undef, label %bb6, label %bb4
30
31bb4:                                              ; preds = %bb3
32  switch i64 undef, label %bb5 [
33    i64 9223372036854775807, label %bb6
34    i64 0, label %bb6
35  ]
36
37bb5:                                              ; preds = %bb4
38  br label %bb6
39
40bb6:                                              ; preds = %bb5, %bb4, %bb4, %bb3
41  %tmp7 = phi %4* [ undef, %bb5 ], [ undef, %bb4 ], [ undef, %bb3 ], [ undef, %bb4 ]
42  unreachable
43}
44
45; When rewriting operands for a phi which has multiple operands
46; for the same block, use the exactly same value in each block.
47
48; CHECK-LABEL: define void @test1(
49; CHECK: %0 = bitcast i8* %tmp3 to %0*
50; CHECK: br i1 undef, label %bb7, label %bb7
51; CHECK: bb7:
52; CHECK: %tmp8 = phi %0* [ %0, %bb ], [ %0, %bb ]
53; CHECK: }
54define void @test1() {
55bb:
56  %tmp = tail call %0* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to %0* ()*)()
57  %tmp2 = bitcast %0* %tmp to i8*
58  %tmp3 = tail call i8* @objc_retainAutoreleasedReturnValue(i8* %tmp2) nounwind
59  br i1 undef, label %bb7, label %bb7
60
61bb7:                                              ; preds = %bb6, %bb6, %bb5
62  %tmp8 = phi %0* [ %tmp, %bb ], [ %tmp, %bb ]
63  unreachable
64}
65
66; When looking for the defining instruction for an objc_retainAutoreleasedReturnValue
67; call, handle the case where it's an invoke in a different basic block.
68; rdar://11714057
69
70; CHECK: define void @_Z6doTestP8NSString() personality i8* bitcast (i32 (...)* @__gxx_personality_sj0 to i8*) {
71; CHECK: invoke.cont:                                      ; preds = %entry
72; CHECK-NEXT: call void asm sideeffect "mov\09r7, r7\09\09@ marker for objc_retainAutoreleaseReturnValue", ""()
73; CHECK-NEXT: %tmp = tail call i8* @objc_retainAutoreleasedReturnValue(i8* %call) [[NUW:#[0-9]+]]
74; CHECK: }
75define void @_Z6doTestP8NSString() personality i8* bitcast (i32 (...)* @__gxx_personality_sj0 to i8*) {
76entry:
77  %call = invoke i8* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i8* ()*)()
78          to label %invoke.cont unwind label %lpad
79
80invoke.cont:                                      ; preds = %entry
81  %tmp = tail call i8* @objc_retainAutoreleasedReturnValue(i8* %call) nounwind
82  unreachable
83
84lpad:                                             ; preds = %entry
85  %tmp1 = landingpad { i8*, i32 }
86          cleanup
87  resume { i8*, i32 } undef
88}
89
90!clang.arc.retainAutoreleasedReturnValueMarker = !{!0}
91
92!0 = !{!"mov\09r7, r7\09\09@ marker for objc_retainAutoreleaseReturnValue"}
93
94; CHECK: attributes #0 = { optsize }
95; CHECK: attributes [[NUW]] = { nounwind }
96