2 ; RUN: opt < %s -instcombine -licm -loop-unswitch -loop-unswitch-threshold=1000 -enable-mssa-loop-dependency=true -verify-memoryssa -disable-output -stats 2>&1| FileCheck %s
3 ; Check no loop unswitch is done because unswitching of equality expr with
4 ; undef is unsafe before the freeze patch is committed.
5 ; CHECK-NOT: Number of branches unswitched
7 define void @ham(i64 %arg) local_unnamed_addr {
9 %tmp = icmp eq i64 %arg, 0
10 br i1 %tmp, label %bb3, label %bb1
13 %tmp2 = load volatile i64, i64* @global, align 8
16 bb3: ; preds = %bb1, %bb
17 %tmp4 = phi i64 [ %tmp2, %bb1 ], [ undef, %bb ]
18 %tmp5 = load i64, i64* @global.1, align 8
21 bb6: ; preds = %bb21, %bb3
22 %tmp7 = phi i64 [ 3, %bb21 ], [ %tmp5, %bb3 ]
23 %tmp8 = phi i64 [ %tmp25, %bb21 ], [ 0, %bb3 ]
24 %tmp9 = icmp eq i64 %tmp7, %arg
25 br i1 %tmp9, label %bb10, label %bb28
28 %tmp11 = icmp eq i64 %tmp7, 0
29 br i1 %tmp11, label %bb21, label %bb12
32 %tmp13 = load i64, i64* @global.2, align 8
33 %tmp14 = add nsw i64 %tmp13, 1
34 store i64 %tmp14, i64* @global.2, align 8
35 %tmp15 = load i64, i64* @global.3, align 8
36 %tmp16 = icmp eq i64 %tmp15, %tmp4
37 br i1 %tmp16, label %bb17, label %bb21
40 %tmp18 = phi i64 [ %tmp15, %bb12 ]
41 %tmp19 = load i64, i64* @global.4, align 8
42 %tmp20 = add nsw i64 %tmp19, %tmp18
43 store i64 %tmp20, i64* @global.5, align 8
46 bb21: ; preds = %bb12, %bb10
47 %tmp22 = load i64, i64* @global.3, align 8
48 %tmp23 = load volatile i64, i64* @global, align 8
49 %tmp24 = add nsw i64 %tmp23, %tmp22
50 store i64 %tmp24, i64* @global.5, align 8
51 store i64 3, i64* @global.1, align 8
52 %tmp25 = add nsw i64 %tmp8, 1
53 %tmp26 = load i64, i64* @global.6, align 8
54 %tmp27 = icmp slt i64 %tmp25, %tmp26
55 br i1 %tmp27, label %bb6, label %bb28
57 bb28: ; preds = %bb21, %bb6
60 bb29: ; preds = %bb28, %bb17
64 define void @zot(i64 %arg, i64 %arg1) local_unnamed_addr {
66 %tmp = icmp eq i64 %arg, 0
67 %tmp2 = select i1 %tmp, i64 %arg1, i64 undef
68 %tmp3 = load i64, i64* @global.1, align 8
71 bb4: ; preds = %bb19, %bb
72 %tmp5 = phi i64 [ 3, %bb19 ], [ %tmp3, %bb ]
73 %tmp6 = phi i64 [ %tmp23, %bb19 ], [ 0, %bb ]
74 %tmp7 = icmp eq i64 %tmp5, %arg
75 br i1 %tmp7, label %bb8, label %bb26
78 %tmp9 = icmp eq i64 %tmp5, 0
79 br i1 %tmp9, label %bb19, label %bb10
82 %tmp11 = load i64, i64* @global.2, align 8
83 %tmp12 = add nsw i64 %tmp11, 1
84 store i64 %tmp12, i64* @global.2, align 8
85 %tmp13 = load i64, i64* @global.3, align 8
86 %tmp14 = icmp eq i64 %tmp13, %tmp2
87 br i1 %tmp14, label %bb15, label %bb19
90 %tmp16 = phi i64 [ %tmp13, %bb10 ]
91 %tmp17 = load i64, i64* @global.4, align 8
92 %tmp18 = add nsw i64 %tmp17, %tmp16
93 store i64 %tmp18, i64* @global.5, align 8
96 bb19: ; preds = %bb10, %bb8
97 %tmp20 = load i64, i64* @global.3, align 8
98 %tmp21 = load volatile i64, i64* @global, align 8
99 %tmp22 = add nsw i64 %tmp21, %tmp20
100 store i64 %tmp22, i64* @global.5, align 8
101 store i64 3, i64* @global.1, align 8
102 %tmp23 = add nsw i64 %tmp6, 1
103 %tmp24 = load i64, i64* @global.6, align 8
104 %tmp25 = icmp slt i64 %tmp23, %tmp24
105 br i1 %tmp25, label %bb4, label %bb26
107 bb26: ; preds = %bb19, %bb4
110 bb27: ; preds = %bb26, %bb15
114 @global = common global i64 0, align 8
115 @global.1 = common global i64 0, align 8
116 @global.2 = common global i64 0, align 8
117 @global.3 = common global i64 0, align 8
118 @global.4 = common global i64 0, align 8
119 @global.5 = common global i64 0, align 8
120 @global.6 = common global i64 0, align 8