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
| ; RUN: opt < %s -basicaa -loop-interchange -pass-remarks-missed='loop-interchange' -pass-remarks-output=%t -S \
; RUN: -verify-dom-info -verify-loop-info -verify-loop-lcssa 2>&1 | FileCheck -check-prefix=IR %s
; RUN: FileCheck --input-file=%t %s
; Inner loop only reductions are not supported currently. See discussion at
; D53027 for more information on the required checks.
@A = common global [500 x [500 x i32]] zeroinitializer
@X = common global i32 0
@B = common global [500 x [500 x i32]] zeroinitializer
@Y = common global i32 0
;; global X
;; for( int i=1;i<N;i++)
;; for( int j=1;j<N;j++)
;; X+=A[j][i];
; CHECK: --- !Missed
; CHECK-NEXT: Pass: loop-interchange
; CHECK-NEXT: Name: UnsupportedPHI
; CHECK-NEXT: Function: reduction_01
; IR-LABEL: @reduction_01(
; IR-NOT: split
define void @reduction_01(i32 %N) {
entry:
%cmp16 = icmp sgt i32 %N, 1
br i1 %cmp16, label %for.body3.lr.ph, label %for.end8
for.body3.lr.ph: ; preds = %for.cond1.for.inc6_crit_edge, %entry
%indvars.iv18 = phi i64 [ %indvars.iv.next19, %for.cond1.for.inc6_crit_edge ], [ 1, %entry ]
%X.promoted = load i32, i32* @X
br label %for.body3
for.body3: ; preds = %for.body3, %for.body3.lr.ph
%indvars.iv = phi i64 [ 1, %for.body3.lr.ph ], [ %indvars.iv.next, %for.body3 ]
%add15 = phi i32 [ %X.promoted, %for.body3.lr.ph ], [ %add, %for.body3 ]
%arrayidx5 = getelementptr inbounds [500 x [500 x i32]], [500 x [500 x i32]]* @A, i64 0, i64 %indvars.iv, i64 %indvars.iv18
%0 = load i32, i32* %arrayidx5
%add = add nsw i32 %add15, %0
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp eq i32 %lftr.wideiv, %N
br i1 %exitcond, label %for.cond1.for.inc6_crit_edge, label %for.body3
for.cond1.for.inc6_crit_edge: ; preds = %for.body3
%add.lcssa = phi i32 [ %add, %for.body3 ]
store i32 %add.lcssa, i32* @X
%indvars.iv.next19 = add nuw nsw i64 %indvars.iv18, 1
%lftr.wideiv20 = trunc i64 %indvars.iv.next19 to i32
%exitcond21 = icmp eq i32 %lftr.wideiv20, %N
br i1 %exitcond21, label %for.end8, label %for.body3.lr.ph
for.end8: ; preds = %for.cond1.for.inc6_crit_edge, %entry
ret void
}
;; Not tightly nested. Do not interchange.
;; for( int i=1;i<N;i++)
;; for( int j=1;j<N;j++) {
;; for( int k=1;k<N;k++) {
;; X+=A[k][j];
;; }
;; Y+=B[j][i];
;; }
;; Not tightly nested. Do not interchange.
;; Not interchanged hence the phi's in the inner loop will not be split.
; CHECK: --- !Missed
; CHECK-NEXT: Pass: loop-interchange
; CHECK-NEXT: Name: UnsupportedPHIOuter
; CHECK-NEXT: Function: reduction_03
; IR-LABEL: @reduction_03(
; IR-NOT: split
define void @reduction_03(i32 %N) {
entry:
%cmp35 = icmp sgt i32 %N, 1
br i1 %cmp35, label %for.cond4.preheader.lr.ph, label %for.end19
for.cond4.preheader.lr.ph: ; preds = %for.cond1.for.inc17_crit_edge, %entry
%indvars.iv41 = phi i64 [ %indvars.iv.next42, %for.cond1.for.inc17_crit_edge ], [ 1, %entry ]
%Y.promoted = load i32, i32* @Y
br label %for.body6.lr.ph
for.body6.lr.ph: ; preds = %for.cond4.for.end_crit_edge, %for.cond4.preheader.lr.ph
%indvars.iv37 = phi i64 [ 1, %for.cond4.preheader.lr.ph ], [ %indvars.iv.next38, %for.cond4.for.end_crit_edge ]
%add1334 = phi i32 [ %Y.promoted, %for.cond4.preheader.lr.ph ], [ %add13, %for.cond4.for.end_crit_edge ]
%X.promoted = load i32, i32* @X
br label %for.body6
for.body6: ; preds = %for.body6, %for.body6.lr.ph
%indvars.iv = phi i64 [ 1, %for.body6.lr.ph ], [ %indvars.iv.next, %for.body6 ]
%arrayidx8 = getelementptr inbounds [500 x [500 x i32]], [500 x [500 x i32]]* @A, i64 0, i64 %indvars.iv, i64 %indvars.iv37
%0 = load i32, i32* %arrayidx8
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp eq i32 %lftr.wideiv, %N
br i1 %exitcond, label %for.cond4.for.end_crit_edge, label %for.body6
for.cond4.for.end_crit_edge: ; preds = %for.body6
%arrayidx12 = getelementptr inbounds [500 x [500 x i32]], [500 x [500 x i32]]* @B, i64 0, i64 %indvars.iv37, i64 %indvars.iv41
%1 = load i32, i32* %arrayidx12
%add13 = add nsw i32 %add1334, %1
%indvars.iv.next38 = add nuw nsw i64 %indvars.iv37, 1
%lftr.wideiv39 = trunc i64 %indvars.iv.next38 to i32
%exitcond40 = icmp eq i32 %lftr.wideiv39, %N
br i1 %exitcond40, label %for.cond1.for.inc17_crit_edge, label %for.body6.lr.ph
for.cond1.for.inc17_crit_edge: ; preds = %for.cond4.for.end_crit_edge
%add13.lcssa = phi i32 [ %add13, %for.cond4.for.end_crit_edge ]
store i32 %add13.lcssa, i32* @Y
%indvars.iv.next42 = add nuw nsw i64 %indvars.iv41, 1
%lftr.wideiv43 = trunc i64 %indvars.iv.next42 to i32
%exitcond44 = icmp eq i32 %lftr.wideiv43, %N
br i1 %exitcond44, label %for.end19, label %for.cond4.preheader.lr.ph
for.end19: ; preds = %for.cond1.for.inc17_crit_edge, %entry
ret void
}
|