1; RUN: llc < %s -disable-fp-elim
2target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32-S128"
3target triple = "i386-apple-macosx10.7"
4
5; This test case has a landing pad with two predecessors, and a variable that
6; is undef on the first edge while carrying the first function return value on
7; the second edge.
8;
9; Live range splitting tries to isolate the block containing the first function
10; call, and it is important that the last split point is after the function call
11; so the return value can spill.
12;
13; <rdar://problem/10664933>
14
15@Exception = external unnamed_addr constant { i8*, i8* }
16
17declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) nounwind
18
19define void @f(i32* nocapture %arg, i32* nocapture %arg1, i32* nocapture %arg2, i32* nocapture %arg3, i32 %arg4, i32 %arg5) optsize ssp {
20bb:
21  br i1 undef, label %bb6, label %bb7
22
23bb6:                                              ; preds = %bb
24  %tmp = select i1 false, i32 0, i32 undef
25  br label %bb7
26
27bb7:                                              ; preds = %bb6, %bb
28  %tmp8 = phi i32 [ %tmp, %bb6 ], [ 0, %bb ]
29  %tmp9 = shl i32 %tmp8, 2
30  %tmp10 = invoke noalias i8* @_Znam(i32 undef) optsize
31          to label %bb11 unwind label %bb20
32
33bb11:                                             ; preds = %bb7
34  %tmp12 = ptrtoint i8* %tmp10 to i32
35  %tmp13 = bitcast i8* %tmp10 to i32*
36  %tmp14 = shl i32 %tmp8, 2
37  %tmp15 = getelementptr i32* %tmp13, i32 undef
38  %tmp16 = getelementptr i32* %tmp13, i32 undef
39  %tmp17 = zext i32 %tmp9 to i64
40  %tmp18 = add i64 %tmp17, -1
41  %tmp19 = icmp ugt i64 %tmp18, 4294967295
42  br i1 %tmp19, label %bb29, label %bb31
43
44bb20:                                             ; preds = %bb43, %bb41, %bb29, %bb7
45  %tmp21 = phi i32 [ undef, %bb7 ], [ %tmp12, %bb43 ], [ %tmp12, %bb29 ], [ %tmp12, %bb41 ]
46  %tmp22 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
47          catch i8* bitcast ({ i8*, i8* }* @Exception to i8*)
48  br i1 undef, label %bb23, label %bb69
49
50bb23:                                             ; preds = %bb38, %bb20
51  %tmp24 = phi i32 [ %tmp12, %bb38 ], [ %tmp21, %bb20 ]
52  %tmp25 = icmp eq i32 %tmp24, 0
53  br i1 %tmp25, label %bb28, label %bb26
54
55bb26:                                             ; preds = %bb23
56  %tmp27 = inttoptr i32 %tmp24 to i8*
57  br label %bb28
58
59bb28:                                             ; preds = %bb26, %bb23
60  ret void
61
62bb29:                                             ; preds = %bb11
63  invoke void @OnOverFlow() optsize
64          to label %bb30 unwind label %bb20
65
66bb30:                                             ; preds = %bb29
67  unreachable
68
69bb31:                                             ; preds = %bb11
70  %tmp32 = bitcast i32* %tmp15 to i8*
71  %tmp33 = zext i32 %tmp8 to i64
72  %tmp34 = add i64 %tmp33, -1
73  %tmp35 = icmp ugt i64 %tmp34, 4294967295
74  %tmp36 = icmp sgt i32 %tmp8, 0
75  %tmp37 = add i32 %tmp9, -4
76  br label %bb38
77
78bb38:                                             ; preds = %bb67, %bb31
79  %tmp39 = phi i32 [ %tmp68, %bb67 ], [ undef, %bb31 ]
80  %tmp40 = icmp sgt i32 %tmp39, undef
81  br i1 %tmp40, label %bb41, label %bb23
82
83bb41:                                             ; preds = %bb38
84  invoke void @Pjii(i32* %tmp16, i32 0, i32 %tmp8) optsize
85          to label %bb42 unwind label %bb20
86
87bb42:                                             ; preds = %bb41
88  tail call void @llvm.memset.p0i8.i32(i8* %tmp32, i8 0, i32 %tmp9, i32 1, i1 false) nounwind
89  br i1 %tmp35, label %bb43, label %bb45
90
91bb43:                                             ; preds = %bb42
92  invoke void @OnOverFlow() optsize
93          to label %bb44 unwind label %bb20
94
95bb44:                                             ; preds = %bb43
96  unreachable
97
98bb45:                                             ; preds = %bb57, %bb42
99  %tmp46 = phi i32 [ %tmp58, %bb57 ], [ 255, %bb42 ]
100  %tmp47 = icmp slt i32 undef, 0
101  br i1 %tmp47, label %bb48, label %bb59
102
103bb48:                                             ; preds = %bb45
104  tail call void @llvm.memset.p0i8.i32(i8* %tmp32, i8 0, i32 %tmp9, i32 1, i1 false) nounwind
105  br i1 %tmp36, label %bb49, label %bb57
106
107bb49:                                             ; preds = %bb49, %bb48
108  %tmp50 = phi i32 [ %tmp55, %bb49 ], [ 0, %bb48 ]
109  %tmp51 = add i32 %tmp50, undef
110  %tmp52 = add i32 %tmp50, undef
111  %tmp53 = getelementptr i32* %tmp13, i32 %tmp52
112  %tmp54 = load i32* %tmp53, align 4
113  %tmp55 = add i32 %tmp50, 1
114  %tmp56 = icmp eq i32 %tmp55, %tmp8
115  br i1 %tmp56, label %bb57, label %bb49
116
117bb57:                                             ; preds = %bb49, %bb48
118  %tmp58 = add i32 %tmp46, -1
119  br label %bb45
120
121bb59:                                             ; preds = %bb45
122  %tmp60 = ashr i32 %tmp46, 31
123  tail call void @llvm.memset.p0i8.i32(i8* null, i8 0, i32 %tmp37, i32 1, i1 false) nounwind
124  br i1 %tmp36, label %bb61, label %bb67
125
126bb61:                                             ; preds = %bb61, %bb59
127  %tmp62 = phi i32 [ %tmp65, %bb61 ], [ 0, %bb59 ]
128  %tmp63 = add i32 %tmp62, %tmp14
129  %tmp64 = getelementptr i32* %tmp13, i32 %tmp63
130  store i32 0, i32* %tmp64, align 4
131  %tmp65 = add i32 %tmp62, 1
132  %tmp66 = icmp eq i32 %tmp65, %tmp8
133  br i1 %tmp66, label %bb67, label %bb61
134
135bb67:                                             ; preds = %bb61, %bb59
136  %tmp68 = add i32 %tmp39, -1
137  br label %bb38
138
139bb69:                                             ; preds = %bb20
140  resume { i8*, i32 } %tmp22
141}
142
143declare i32 @__gxx_personality_v0(...)
144
145declare noalias i8* @_Znam(i32) optsize
146
147declare void @Pjii(i32*, i32, i32) optsize
148
149declare i32 @llvm.eh.typeid.for(i8*) nounwind readnone
150
151declare void @OnOverFlow() noreturn optsize ssp align 2
152