1 ; RUN: opt -S < %s -simplifycfg -simplifycfg-merge-cond-stores=true -simplifycfg-merge-cond-stores-aggressively=false -phi-node-folding-threshold=2 | FileCheck %s
3 target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
4 target triple = "armv7--linux-gnueabihf"
6 ; This is a bit reversal that has been run through the early optimizer (-mem2reg -gvn -instcombine).
7 ; There should be no additional PHIs created at all. The store should be on its own in a predicated
8 ; block and there should be no PHIs.
12 ; CHECK: br i1 {{.*}}, label %[[L:.*]], label %[[R:.*]]
13 ; CHECK: [[L]] ; preds =
15 ; CHECK-NEXT: br label %[[R]]
16 ; CHECK: [[R]] ; preds =
17 ; CHECK-NEXT: ret i32 0
19 define i32 @f(i32* %b) {
21 %0 = load i32, i32* %b, align 4
23 %tobool = icmp eq i32 %and, 0
24 br i1 %tobool, label %if.end, label %if.then
26 if.then: ; preds = %entry
27 %or = or i32 %0, -2147483648
28 store i32 %or, i32* %b, align 4
31 if.end: ; preds = %entry, %if.then
32 %1 = phi i32 [ %0, %entry ], [ %or, %if.then ]
34 %tobool2 = icmp eq i32 %and1, 0
35 br i1 %tobool2, label %if.end5, label %if.then3
37 if.then3: ; preds = %if.end
38 %or4 = or i32 %1, 1073741824
39 store i32 %or4, i32* %b, align 4
42 if.end5: ; preds = %if.end, %if.then3
43 %2 = phi i32 [ %1, %if.end ], [ %or4, %if.then3 ]
45 %tobool7 = icmp eq i32 %and6, 0
46 br i1 %tobool7, label %if.end10, label %if.then8
48 if.then8: ; preds = %if.end5
49 %or9 = or i32 %2, 536870912
50 store i32 %or9, i32* %b, align 4
53 if.end10: ; preds = %if.end5, %if.then8
54 %3 = phi i32 [ %2, %if.end5 ], [ %or9, %if.then8 ]
55 %and11 = and i32 %3, 8
56 %tobool12 = icmp eq i32 %and11, 0
57 br i1 %tobool12, label %if.end15, label %if.then13
59 if.then13: ; preds = %if.end10
60 %or14 = or i32 %3, 268435456
61 store i32 %or14, i32* %b, align 4
64 if.end15: ; preds = %if.end10, %if.then13
65 %4 = phi i32 [ %3, %if.end10 ], [ %or14, %if.then13 ]
66 %and16 = and i32 %4, 16
67 %tobool17 = icmp eq i32 %and16, 0
68 br i1 %tobool17, label %if.end20, label %if.then18
70 if.then18: ; preds = %if.end15
71 %or19 = or i32 %4, 134217728
72 store i32 %or19, i32* %b, align 4
75 if.end20: ; preds = %if.end15, %if.then18
76 %5 = phi i32 [ %4, %if.end15 ], [ %or19, %if.then18 ]
77 %and21 = and i32 %5, 32
78 %tobool22 = icmp eq i32 %and21, 0
79 br i1 %tobool22, label %if.end25, label %if.then23
81 if.then23: ; preds = %if.end20
82 %or24 = or i32 %5, 67108864
83 store i32 %or24, i32* %b, align 4
86 if.end25: ; preds = %if.end20, %if.then23
87 %6 = phi i32 [ %5, %if.end20 ], [ %or24, %if.then23 ]
88 %and26 = and i32 %6, 64
89 %tobool27 = icmp eq i32 %and26, 0
90 br i1 %tobool27, label %if.end30, label %if.then28
92 if.then28: ; preds = %if.end25
93 %or29 = or i32 %6, 33554432
94 store i32 %or29, i32* %b, align 4
97 if.end30: ; preds = %if.end25, %if.then28
98 %7 = phi i32 [ %6, %if.end25 ], [ %or29, %if.then28 ]
99 %and31 = and i32 %7, 256
100 %tobool32 = icmp eq i32 %and31, 0
101 br i1 %tobool32, label %if.end35, label %if.then33
103 if.then33: ; preds = %if.end30
104 %or34 = or i32 %7, 8388608
105 store i32 %or34, i32* %b, align 4
108 if.end35: ; preds = %if.end30, %if.then33
109 %8 = phi i32 [ %7, %if.end30 ], [ %or34, %if.then33 ]
110 %and36 = and i32 %8, 512
111 %tobool37 = icmp eq i32 %and36, 0
112 br i1 %tobool37, label %if.end40, label %if.then38
114 if.then38: ; preds = %if.end35
115 %or39 = or i32 %8, 4194304
116 store i32 %or39, i32* %b, align 4
119 if.end40: ; preds = %if.end35, %if.then38
120 %9 = phi i32 [ %8, %if.end35 ], [ %or39, %if.then38 ]
121 %and41 = and i32 %9, 1024
122 %tobool42 = icmp eq i32 %and41, 0
123 br i1 %tobool42, label %if.end45, label %if.then43
125 if.then43: ; preds = %if.end40
126 %or44 = or i32 %9, 2097152
127 store i32 %or44, i32* %b, align 4
130 if.end45: ; preds = %if.end40, %if.then43
131 %10 = phi i32 [ %9, %if.end40 ], [ %or44, %if.then43 ]
132 %and46 = and i32 %10, 2048
133 %tobool47 = icmp eq i32 %and46, 0
134 br i1 %tobool47, label %if.end50, label %if.then48
136 if.then48: ; preds = %if.end45
137 %or49 = or i32 %10, 1048576
138 store i32 %or49, i32* %b, align 4
141 if.end50: ; preds = %if.end45, %if.then48
142 %11 = phi i32 [ %10, %if.end45 ], [ %or49, %if.then48 ]
143 %and51 = and i32 %11, 4096
144 %tobool52 = icmp eq i32 %and51, 0
145 br i1 %tobool52, label %if.end55, label %if.then53
147 if.then53: ; preds = %if.end50
148 %or54 = or i32 %11, 524288
149 store i32 %or54, i32* %b, align 4
152 if.end55: ; preds = %if.end50, %if.then53
153 %12 = phi i32 [ %11, %if.end50 ], [ %or54, %if.then53 ]
154 %and56 = and i32 %12, 8192
155 %tobool57 = icmp eq i32 %and56, 0
156 br i1 %tobool57, label %if.end60, label %if.then58
158 if.then58: ; preds = %if.end55
159 %or59 = or i32 %12, 262144
160 store i32 %or59, i32* %b, align 4
163 if.end60: ; preds = %if.end55, %if.then58
164 %13 = phi i32 [ %12, %if.end55 ], [ %or59, %if.then58 ]
165 %and61 = and i32 %13, 16384
166 %tobool62 = icmp eq i32 %and61, 0
167 br i1 %tobool62, label %if.end65, label %if.then63
169 if.then63: ; preds = %if.end60
170 %or64 = or i32 %13, 131072
171 store i32 %or64, i32* %b, align 4
174 if.end65: ; preds = %if.end60, %if.then63
175 %14 = phi i32 [ %13, %if.end60 ], [ %or64, %if.then63 ]
176 %and66 = and i32 %14, 32768
177 %tobool67 = icmp eq i32 %and66, 0
178 br i1 %tobool67, label %if.end70, label %if.then68
180 if.then68: ; preds = %if.end65
181 %or69 = or i32 %14, 65536
182 store i32 %or69, i32* %b, align 4
185 if.end70: ; preds = %if.end65, %if.then68
186 %15 = phi i32 [ %14, %if.end65 ], [ %or69, %if.then68 ]
187 %and71 = and i32 %15, 128
188 %tobool72 = icmp eq i32 %and71, 0
189 br i1 %tobool72, label %if.end75, label %if.then73
191 if.then73: ; preds = %if.end70
192 %or74 = or i32 %15, 16777216
193 store i32 %or74, i32* %b, align 4
196 if.end75: ; preds = %if.end70, %if.then73