1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: -p
; RUN: opt < %s -indvars -S | FileCheck %s
; RUN: opt < %s -passes=indvars -S | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
declare i1 @foo(i8*, i8*)
declare i1 @bar()
declare i1 @baz()
define i1 @kill_backedge_and_phis(i8* align 1 %lhs, i8* align 1 %rhs, i32 %len) {
; CHECK-LABEL: @kill_backedge_and_phis(
; CHECK-NEXT: entry:
; CHECK-NEXT: %length_not_zero = icmp ne i32 %len, 0
; CHECK-NEXT: br i1 %length_not_zero, label %loop_preheader, label %exit
; CHECK: loop_preheader:
; CHECK-NEXT: br label %loop
; CHECK: loop:
; CHECK-NEXT: %iv.next = add nuw nsw i32 0, 1
; CHECK-NEXT: %left_ptr = getelementptr inbounds i8, i8* %lhs, i32 0
; CHECK-NEXT: %right_ptr = getelementptr inbounds i8, i8* %rhs, i32 0
; CHECK-NEXT: %result = call i1 @foo(i8* %left_ptr, i8* %right_ptr)
; CHECK-NEXT: br i1 %result, label %exiting_1, label %exit.loopexit
; CHECK: exiting_1:
; CHECK-NEXT: %iv.wide.is_not_zero = icmp ne i64 0, 0
; CHECK-NEXT: br i1 false, label %exiting_2, label %exit.loopexit
; CHECK: exiting_2:
; CHECK-NEXT: %bar_ret = call i1 @bar()
; CHECK-NEXT: br i1 %bar_ret, label %exit.loopexit, label %exiting_3
; CHECK: exiting_3:
; CHECK-NEXT: %baz_ret = call i1 @baz()
; CHECK-NEXT: %continue = icmp ne i32 %iv.next, %len
; CHECK-NEXT: %or.cond = select i1 %baz_ret, i1 %continue, i1 false
; CHECK-NEXT: br i1 %or.cond, label %loop, label %exit.loopexit
; CHECK: exit.loopexit:
; CHECK-NEXT: %val.ph = phi i1 [ %baz_ret, %exiting_3 ], [ %bar_ret, %exiting_2 ], [ %iv.wide.is_not_zero, %exiting_1 ], [ %result, %loop ]
; CHECK-NEXT: br label %exit
; CHECK: exit:
; CHECK-NEXT: %val = phi i1 [ false, %entry ], [ %val.ph, %exit.loopexit ]
; CHECK-NEXT: ret i1 %val
;
entry:
%length_not_zero = icmp ne i32 %len, 0
br i1 %length_not_zero, label %loop_preheader, label %exit
loop_preheader:
br label %loop
loop:
%iv = phi i32 [ 0, %loop_preheader ], [ %iv.next, %latch ]
%iv.wide = phi i64 [ 0, %loop_preheader ], [ %iv.wide.next, %latch ]
%iv.next = add i32 %iv, 1
%iv.wide.next = add i64 %iv.wide, 1
%left_ptr = getelementptr inbounds i8, i8* %lhs, i32 %iv
%right_ptr = getelementptr inbounds i8, i8* %rhs, i32 %iv
%result = call i1 @foo(i8* %left_ptr, i8* %right_ptr)
br i1 %result, label %exiting_1, label %exit
exiting_1:
%iv.wide.is_not_zero = icmp ne i64 %iv.wide, 0
br i1 %iv.wide.is_not_zero, label %exiting_2, label %exit
exiting_2:
%bar_ret = call i1 @bar()
br i1 %bar_ret, label %exit, label %exiting_3
exiting_3:
%baz_ret = call i1 @baz()
br i1 %baz_ret, label %latch, label %exit
latch:
%continue = icmp ne i32 %iv.next, %len
br i1 %continue, label %loop, label %exit
exit:
%val = phi i1 [ %result, %loop ], [ %iv.wide.is_not_zero, %exiting_1 ],
[ %bar_ret, %exiting_2 ], [ %baz_ret, %exiting_3 ],
[ %baz_ret, %latch ], [ 0, %entry ]
ret i1 %val
}
define i1 @siblings(i8* align 1 %lhs, i8* align 1 %rhs, i32 %len) {
; CHECK-LABEL: @siblings(
; CHECK-NEXT: entry:
; CHECK-NEXT: %length_not_zero = icmp ne i32 %len, 0
; CHECK-NEXT: br i1 %length_not_zero, label %weird_loop.preheader, label %exit
; CHECK: weird_loop.preheader:
; CHECK-NEXT: br label %weird_loop
; CHECK: weird_loop:
; CHECK-NEXT: %weird.iv = phi i32 [ %weird.iv.next, %weird_loop ], [ 0, %weird_loop.preheader ]
; CHECK-NEXT: %weird.iv.next = add i32 %weird.iv, 1
; CHECK-NEXT: %weird.iv.wide = zext i32 %weird.iv to i64
; CHECK-NEXT: %weird.cond = call i1 @bar()
; CHECK-NEXT: br i1 %weird.cond, label %weird_loop, label %loop.preheader
; CHECK: loop.preheader:
; CHECK-NEXT: %weird.iv.lcssa = phi i32 [ %weird.iv, %weird_loop ]
; CHECK-NEXT: %weird.iv.wide.lcssa = phi i64 [ %weird.iv.wide, %weird_loop ]
; CHECK-NEXT: br label %loop
; CHECK: loop:
; CHECK-NEXT: %iv.next = add i32 %weird.iv.lcssa, 1
; CHECK-NEXT: %left_ptr = getelementptr inbounds i8, i8* %lhs, i32 %weird.iv.lcssa
; CHECK-NEXT: %right_ptr = getelementptr inbounds i8, i8* %rhs, i32 %weird.iv.lcssa
; CHECK-NEXT: %result = call i1 @foo(i8* %left_ptr, i8* %right_ptr)
; CHECK-NEXT: br i1 %result, label %exiting_1, label %exit.loopexit
; CHECK: exiting_1:
; CHECK-NEXT: %iv.wide.is_not_zero = icmp ne i64 %weird.iv.wide.lcssa, %weird.iv.wide.lcssa
; CHECK-NEXT: br i1 false, label %exiting_2, label %exit.loopexit
; CHECK: exiting_2:
; CHECK-NEXT: %bar_ret = call i1 @bar()
; CHECK-NEXT: br i1 %bar_ret, label %exit.loopexit, label %exiting_3
; CHECK: exiting_3:
; CHECK-NEXT: %baz_ret = call i1 @baz()
; CHECK-NEXT: %continue = icmp ne i32 %iv.next, %len
; CHECK-NEXT: %or.cond = select i1 %baz_ret, i1 %continue, i1 false
; CHECK-NEXT: br i1 %or.cond, label %loop, label %exit.loopexit
; CHECK: exit.loopexit:
; CHECK-NEXT: %val.ph = phi i1 [ %baz_ret, %exiting_3 ], [ %bar_ret, %exiting_2 ], [ %iv.wide.is_not_zero, %exiting_1 ], [ %result, %loop ]
; CHECK-NEXT: br label %exit
; CHECK: exit:
; CHECK-NEXT: %val = phi i1 [ false, %entry ], [ %val.ph, %exit.loopexit ]
; CHECK-NEXT: ret i1 %val
;
entry:
%length_not_zero = icmp ne i32 %len, 0
br i1 %length_not_zero, label %weird_loop, label %exit
weird_loop:
%weird.iv = phi i32 [ 0, %entry ], [ %weird.iv.next, %weird_loop ]
%weird.iv.next = add i32 %weird.iv, 1
%weird.iv.wide = zext i32 %weird.iv to i64
%weird.cond = call i1 @bar()
br i1 %weird.cond, label %weird_loop, label %loop
loop:
%iv = phi i32 [ %weird.iv, %weird_loop ], [ %iv.next, %latch ]
%iv.wide = phi i64 [ %weird.iv.wide, %weird_loop ], [ %iv.wide.next, %latch ]
%iv.next = add i32 %iv, 1
%iv.wide.next = add i64 %iv.wide, 1
%left_ptr = getelementptr inbounds i8, i8* %lhs, i32 %iv
%right_ptr = getelementptr inbounds i8, i8* %rhs, i32 %iv
%result = call i1 @foo(i8* %left_ptr, i8* %right_ptr)
br i1 %result, label %exiting_1, label %exit
exiting_1:
%iv.wide.is_not_zero = icmp ne i64 %iv.wide, %weird.iv.wide
br i1 %iv.wide.is_not_zero, label %exiting_2, label %exit
exiting_2:
%bar_ret = call i1 @bar()
br i1 %bar_ret, label %exit, label %exiting_3
exiting_3:
%baz_ret = call i1 @baz()
br i1 %baz_ret, label %latch, label %exit
latch:
%continue = icmp ne i32 %iv.next, %len
br i1 %continue, label %loop, label %exit
exit:
%val = phi i1 [ %result, %loop ], [ %iv.wide.is_not_zero, %exiting_1 ],
[ %bar_ret, %exiting_2 ], [ %baz_ret, %exiting_3 ],
[ %baz_ret, %latch ], [ 0, %entry ]
ret i1 %val
}
|
