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
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=indvars -S < %s | FileCheck %s
declare i1 @cond()
define void @test_01(i32 %x) {
; CHECK-LABEL: @test_01(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 true, label [[LOOP_1_PREHEADER:%.*]], label [[LOOP_2_PREHEADER:%.*]]
; CHECK: loop.2.preheader:
; CHECK-NEXT: br label [[LOOP_2:%.*]]
; CHECK: loop.1.preheader:
; CHECK-NEXT: br label [[LOOP_1:%.*]]
; CHECK: loop.1:
; CHECK-NEXT: [[IV_1:%.*]] = phi i32 [ [[IV_NEXT_1:%.*]], [[GUARDED_1:%.*]] ], [ 0, [[LOOP_1_PREHEADER]] ]
; CHECK-NEXT: [[CHECK_1:%.*]] = icmp slt i32 [[IV_1]], [[X:%.*]]
; CHECK-NEXT: br i1 [[CHECK_1]], label [[GUARDED_1]], label [[FAIL_LOOPEXIT:%.*]]
; CHECK: guarded.1:
; CHECK-NEXT: [[IV_NEXT_1]] = add nuw nsw i32 [[IV_1]], 1
; CHECK-NEXT: [[LOOP_COND_1:%.*]] = call i1 @cond()
; CHECK-NEXT: br i1 [[LOOP_COND_1]], label [[LOOP_1]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK: loop.2:
; CHECK-NEXT: br i1 true, label [[GUARDED_2:%.*]], label [[FAIL_LOOPEXIT1:%.*]]
; CHECK: guarded.2:
; CHECK-NEXT: [[LOOP_COND_2:%.*]] = call i1 @cond()
; CHECK-NEXT: br i1 [[LOOP_COND_2]], label [[LOOP_2]], label [[EXIT_LOOPEXIT2:%.*]]
; CHECK: exit.loopexit:
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: exit.loopexit2:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
; CHECK: fail.loopexit:
; CHECK-NEXT: br label [[FAIL:%.*]]
; CHECK: fail.loopexit1:
; CHECK-NEXT: br label [[FAIL]]
; CHECK: fail:
; CHECK-NEXT: unreachable
;
entry:
br i1 true, label %loop.1, label %loop.2
loop.1:
%iv.1 = phi i32 [0, %entry], [%iv.next.1, %guarded.1]
%check.1 = icmp slt i32 %iv.1, %x
br i1 %check.1, label %guarded.1, label %fail
guarded.1:
%iv.next.1 = add i32 %iv.1, 1
%loop.cond.1 = call i1 @cond()
br i1 %loop.cond.1, label %loop.1, label %exit
loop.2:
%iv.2 = phi i32 [0, %entry], [%iv.next.2, %guarded.2]
%check.2 = icmp slt i32 %iv.2, %x
br i1 %check.2, label %guarded.2, label %fail
guarded.2:
%iv.next.2 = add i32 %iv.2, 1
%loop.cond.2 = call i1 @cond()
br i1 %loop.cond.2, label %loop.2, label %exit
exit:
ret void
fail:
unreachable
}
define void @test_02(i32 %x) {
; CHECK-LABEL: @test_02(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 false, label [[LOOP_1_PREHEADER:%.*]], label [[LOOP_2_PREHEADER:%.*]]
; CHECK: loop.2.preheader:
; CHECK-NEXT: br label [[LOOP_2:%.*]]
; CHECK: loop.1.preheader:
; CHECK-NEXT: br label [[LOOP_1:%.*]]
; CHECK: loop.1:
; CHECK-NEXT: br i1 true, label [[GUARDED_1:%.*]], label [[FAIL_LOOPEXIT:%.*]]
; CHECK: guarded.1:
; CHECK-NEXT: [[LOOP_COND_1:%.*]] = call i1 @cond()
; CHECK-NEXT: br i1 [[LOOP_COND_1]], label [[LOOP_1]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK: loop.2:
; CHECK-NEXT: [[IV_2:%.*]] = phi i32 [ [[IV_NEXT_2:%.*]], [[GUARDED_2:%.*]] ], [ 0, [[LOOP_2_PREHEADER]] ]
; CHECK-NEXT: [[CHECK_2:%.*]] = icmp slt i32 [[IV_2]], [[X:%.*]]
; CHECK-NEXT: br i1 [[CHECK_2]], label [[GUARDED_2]], label [[FAIL_LOOPEXIT1:%.*]]
; CHECK: guarded.2:
; CHECK-NEXT: [[IV_NEXT_2]] = add nuw nsw i32 [[IV_2]], 1
; CHECK-NEXT: [[LOOP_COND_2:%.*]] = call i1 @cond()
; CHECK-NEXT: br i1 [[LOOP_COND_2]], label [[LOOP_2]], label [[EXIT_LOOPEXIT2:%.*]]
; CHECK: exit.loopexit:
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: exit.loopexit2:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
; CHECK: fail.loopexit:
; CHECK-NEXT: br label [[FAIL:%.*]]
; CHECK: fail.loopexit1:
; CHECK-NEXT: br label [[FAIL]]
; CHECK: fail:
; CHECK-NEXT: unreachable
;
entry:
br i1 false, label %loop.1, label %loop.2
loop.1:
%iv.1 = phi i32 [0, %entry], [%iv.next.1, %guarded.1]
%check.1 = icmp slt i32 %iv.1, %x
br i1 %check.1, label %guarded.1, label %fail
guarded.1:
%iv.next.1 = add i32 %iv.1, 1
%loop.cond.1 = call i1 @cond()
br i1 %loop.cond.1, label %loop.1, label %exit
loop.2:
%iv.2 = phi i32 [0, %entry], [%iv.next.2, %guarded.2]
%check.2 = icmp slt i32 %iv.2, %x
br i1 %check.2, label %guarded.2, label %fail
guarded.2:
%iv.next.2 = add i32 %iv.2, 1
%loop.cond.2 = call i1 @cond()
br i1 %loop.cond.2, label %loop.2, label %exit
exit:
ret void
fail:
unreachable
}
|
