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
|
; Remove 'S' Scalar Dependencies #119345
; Scalar dependencies are not handled correctly, so they were removed to avoid
; miscompiles. The loop nest in this test case used to be interchanged, but it's
; no longer triggering. XFAIL'ing this test to indicate that this test should
; interchanged if scalar deps are handled correctly.
;
; XFAIL: *
; RUN: opt < %s -passes=loop-interchange -pass-remarks-output=%t -disable-output
; RUN: FileCheck -input-file %t %s
@f = dso_local local_unnamed_addr global [4 x [9 x i32]] [[9 x i32] [i32 5, i32 3, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0], [9 x i32] zeroinitializer, [9 x i32] zeroinitializer, [9 x i32] zeroinitializer], align 4
@g = common dso_local local_unnamed_addr global i32 0, align 4
; int32_t f[3][3];
; int32_t g;
;
; int32_t test1(_Bool cond) {
; for (int64_t i = 0; i < 3; i++) {
; for (int64_t j = 0; j < 3; j++) {
; int32_t val = f[i][j];
; if (val == 0)
; if (!cond)
; g++;
; else
; g = 3;
; if (!cond)
; g++;
; }
; }
; return g;
; }
;
define dso_local i32 @test1(i1 %cond) {
;
; FIXME: if there's an output dependency inside the loop and Src doesn't
; dominate Dst, we should not interchange. Thus, this currently miscompiles.
;
; CHECK: --- !Passed
; CHECK-NEXT: Pass: loop-interchange
; CHECK-NEXT: Name: Interchanged
; CHECK-NEXT: Function: test1
; CHECK-NEXT: Args:
; CHECK-NEXT: - String: Loop interchanged with enclosing loop.
; CHECK-NEXT: ...
;
for.preheader:
br label %outerloop
outerloop:
%i = phi i64 [ 0, %for.preheader ], [ %indvars.iv.next21.i, %for.latch ]
br label %innerloop
innerloop:
%j = phi i64 [ 0, %outerloop ], [ %j.next, %if.end ]
%arrayidx6.i = getelementptr inbounds [4 x [9 x i32]], [4 x [9 x i32]]* @f, i64 0, i64 %j, i64 %i
%i1 = load i32, i32* %arrayidx6.i, align 4
%tobool.i = icmp eq i32 %i1, 0
br i1 %tobool.i, label %land.end, label %land.rhs
land.rhs:
store i32 3, i32* @g, align 4
br label %land.end
land.end:
br i1 %cond, label %if.end, label %if.then
if.then:
%i2 = load i32, i32* @g, align 4
%inc.i = add i32 %i2, 1
store i32 %inc.i, i32* @g, align 4
br label %if.end
if.end:
%j.next = add nuw nsw i64 %j, 1
%exitcond.i = icmp eq i64 %j.next, 3
br i1 %exitcond.i, label %for.latch, label %innerloop
for.latch:
%indvars.iv.next21.i = add nsw i64 %i, 1
%cmp.i = icmp slt i64 %i, 2
br i1 %cmp.i, label %outerloop, label %exit
exit:
%i3 = load i32, i32* @g, align 4
ret i32 %i3
}
; int32_t f[3][3];
; int32_t g;
;
; int32_t test2(_Bool cond) {
; for (int64_t i = 0; i < 3; i++) {
; for (int64_t j = 0; j < 3; j++) {
; int32_t val = f[i][j];
; g = 3;
; if (val == 0)
; if (!cond)
; g++;
; else
; if (!cond)
; g++;
; }
; }
; return g;
; }
;
define dso_local i32 @test2(i1 %cond) {
;
; FIXME: if there's an output dependency inside the loop and Src doesn't
; dominate Dst, we should not interchange. Thus, this currently miscompiles.
;
; CHECK: --- !Passed
; CHECK-NEXT: Pass: loop-interchange
; CHECK-NEXT: Name: Interchanged
; CHECK-NEXT: Function: test2
; CHECK-NEXT: Args:
; CHECK-NEXT: - String: Loop interchanged with enclosing loop.
; CHECK-NEXT: ...
;
for.preheader:
br label %outerloop
outerloop:
%i = phi i64 [ 0, %for.preheader ], [ %indvars.iv.next21.i, %for.latch ]
br label %innerloop
innerloop:
%j = phi i64 [ 0, %outerloop ], [ %j.next, %if.end ]
%arrayidx6.i = getelementptr inbounds [4 x [9 x i32]], [4 x [9 x i32]]* @f, i64 0, i64 %j, i64 %i
%i1 = load i32, i32* %arrayidx6.i, align 4
%tobool.i = icmp eq i32 %i1, 0
store i32 3, i32* @g, align 4
br i1 %tobool.i, label %land.end, label %land.rhs
land.rhs:
br label %land.end
land.end:
br i1 %cond, label %if.end, label %if.then
if.then:
%i2 = load i32, i32* @g, align 4
%inc.i = add i32 %i2, 1
store i32 %inc.i, i32* @g, align 4
br label %if.end
if.end:
%j.next = add nuw nsw i64 %j, 1
%exitcond.i = icmp eq i64 %j.next, 3
br i1 %exitcond.i, label %for.latch, label %innerloop
for.latch:
%indvars.iv.next21.i = add nsw i64 %i, 1
%cmp.i = icmp slt i64 %i, 2
br i1 %cmp.i, label %outerloop, label %exit
exit:
%i3 = load i32, i32* @g, align 4
ret i32 %i3
}
|
