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
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -indvars < %s | FileCheck %s
; Check that we replace signed comparisons between non-negative values with
; unsigned comparisons if we can.
target datalayout = "n8:16:32:64"
define i32 @test_01(i32 %a, i32 %b, i32* %p) {
; CHECK-LABEL: @test_01(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP_ENTRY:%.*]]
; CHECK: loop.entry:
; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP_BE:%.*]] ]
; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i32 [[IV]], 100
; CHECK-NEXT: br i1 [[CMP1]], label [[B1:%.*]], label [[B2:%.*]]
; CHECK: b1:
; CHECK-NEXT: store i32 [[IV]], i32* [[P:%.*]], align 4
; CHECK-NEXT: br label [[MERGE:%.*]]
; CHECK: b2:
; CHECK-NEXT: store i32 [[A:%.*]], i32* [[P]], align 4
; CHECK-NEXT: br label [[MERGE]]
; CHECK: merge:
; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i32 [[IV]], 100
; CHECK-NEXT: br i1 [[CMP2]], label [[B3:%.*]], label [[B4:%.*]]
; CHECK: b3:
; CHECK-NEXT: store i32 [[IV]], i32* [[P]], align 4
; CHECK-NEXT: br label [[LOOP_BE]]
; CHECK: b4:
; CHECK-NEXT: store i32 [[B:%.*]], i32* [[P]], align 4
; CHECK-NEXT: br label [[LOOP_BE]]
; CHECK: loop.be:
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i32 [[IV_NEXT]], 1000
; CHECK-NEXT: br i1 [[EXITCOND]], label [[LOOP_ENTRY]], label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: ret i32 999
;
entry:
br label %loop.entry
loop.entry:
%iv = phi i32 [ 0, %entry ], [ %iv.next, %loop.be ]
%cmp1 = icmp slt i32 %iv, 100
br i1 %cmp1, label %b1, label %b2
b1:
store i32 %iv, i32* %p
br label %merge
b2:
store i32 %a, i32* %p
br label %merge
merge:
%cmp2 = icmp ult i32 %iv, 100
br i1 %cmp2, label %b3, label %b4
b3:
store i32 %iv, i32* %p
br label %loop.be
b4:
store i32 %b, i32* %p
br label %loop.be
loop.be:
%iv.next = add i32 %iv, 1
%cmp3 = icmp slt i32 %iv.next, 1000
br i1 %cmp3, label %loop.entry, label %exit
exit:
ret i32 %iv
}
define i32 @test_02(i32 %a, i32 %b, i32* %p) {
; CHECK-LABEL: @test_02(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP_ENTRY:%.*]]
; CHECK: loop.entry:
; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP_BE:%.*]] ]
; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt i32 100, [[IV]]
; CHECK-NEXT: br i1 [[CMP1]], label [[B1:%.*]], label [[B2:%.*]]
; CHECK: b1:
; CHECK-NEXT: store i32 [[IV]], i32* [[P:%.*]], align 4
; CHECK-NEXT: br label [[MERGE:%.*]]
; CHECK: b2:
; CHECK-NEXT: store i32 [[A:%.*]], i32* [[P]], align 4
; CHECK-NEXT: br label [[MERGE]]
; CHECK: merge:
; CHECK-NEXT: [[CMP2:%.*]] = icmp ugt i32 100, [[IV]]
; CHECK-NEXT: br i1 [[CMP2]], label [[B3:%.*]], label [[B4:%.*]]
; CHECK: b3:
; CHECK-NEXT: store i32 [[IV]], i32* [[P]], align 4
; CHECK-NEXT: br label [[LOOP_BE]]
; CHECK: b4:
; CHECK-NEXT: store i32 [[B:%.*]], i32* [[P]], align 4
; CHECK-NEXT: br label [[LOOP_BE]]
; CHECK: loop.be:
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i32 [[IV_NEXT]], 1000
; CHECK-NEXT: br i1 [[EXITCOND]], label [[LOOP_ENTRY]], label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: ret i32 999
;
entry:
br label %loop.entry
loop.entry:
%iv = phi i32 [ 0, %entry ], [ %iv.next, %loop.be ]
%cmp1 = icmp sgt i32 100, %iv
br i1 %cmp1, label %b1, label %b2
b1:
store i32 %iv, i32* %p
br label %merge
b2:
store i32 %a, i32* %p
br label %merge
merge:
%cmp2 = icmp ugt i32 100, %iv
br i1 %cmp2, label %b3, label %b4
b3:
store i32 %iv, i32* %p
br label %loop.be
b4:
store i32 %b, i32* %p
br label %loop.be
loop.be:
%iv.next = add i32 %iv, 1
%cmp3 = icmp sgt i32 1000, %iv.next
br i1 %cmp3, label %loop.entry, label %exit
exit:
ret i32 %iv
}
|
