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
|
; 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 -passes=loop-interchange -cache-line-size=64 -verify-dom-info -verify-loop-info -verify-loop-lcssa %s -pass-remarks-output=%t -disable-output
; RUN: FileCheck -input-file %t %s
@b = global [3 x [5 x [8 x i16]]] [[5 x [8 x i16]] zeroinitializer, [5 x [8 x i16]] [[8 x i16] zeroinitializer, [8 x i16] [i16 0, i16 0, i16 0, i16 6, i16 1, i16 6, i16 0, i16 0], [8 x i16] zeroinitializer, [8 x i16] zeroinitializer, [8 x i16] zeroinitializer], [5 x [8 x i16]] zeroinitializer], align 2
@a = common global i32 0, align 4
@d = common dso_local local_unnamed_addr global [1 x [6 x i32]] zeroinitializer, align 4
; Doubly nested loop
;; C test case:
;; int a;
;; short b[3][5][8] = {{}, {{}, 0, 0, 0, 6, 1, 6}};
;; void test1() {
;; int c = 0, d;
;; for (; c <= 2; c++) {
;; if (c)
;; continue;
;; d = 0;
;; for (; d <= 2; d++)
;; a |= b[d][d][c + 5];
;; }
;; }
;
; 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: ...
;
define void @test1() {
entry:
br label %for.body
for.body: ; preds = %entry, %for.inc8
%indvars.iv22 = phi i64 [ 0, %entry ], [ %indvars.iv.next23, %for.inc8 ]
%tobool = icmp eq i64 %indvars.iv22, 0
br i1 %tobool, label %for.cond1.preheader, label %for.inc8
for.cond1.preheader: ; preds = %for.body
br label %for.body3
for.body3: ; preds = %for.cond1.preheader, %for.body3
%indvars.iv = phi i64 [ 0, %for.cond1.preheader ], [ %indvars.iv.next, %for.body3 ]
%0 = add nuw nsw i64 %indvars.iv22, 5
%arrayidx7 = getelementptr inbounds [3 x [5 x [8 x i16]]], ptr @b, i64 0, i64 %indvars.iv, i64 %indvars.iv, i64 %0
%1 = load i16, ptr %arrayidx7
%conv = sext i16 %1 to i32
%2 = load i32, ptr @a
%or = or i32 %2, %conv
store i32 %or, ptr @a
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp ne i64 %indvars.iv.next, 3
br i1 %exitcond, label %for.body3, label %for.inc8.loopexit
for.inc8.loopexit: ; preds = %for.body3
br label %for.inc8
for.inc8: ; preds = %for.inc8.loopexit, %for.body
%indvars.iv.next23 = add nuw nsw i64 %indvars.iv22, 1
%exitcond25 = icmp ne i64 %indvars.iv.next23, 3
br i1 %exitcond25, label %for.body, label %for.end10
for.end10: ; preds = %for.inc8
%3 = load i32, ptr @a
ret void
}
; Triply nested loop
; The innermost and the middle loop are interchanged.
; C test case:
;
;; a;
;; d[][6];
;; void test2() {
;; int g = 10;
;; for (; g; g = g - 5) {
;; short c = 4;
;; for (; c; c--) {
;; int i = 4;
;; for (; i; i--) {
;; if (a)
;; break;
;; d[i][c] = 0;
;; }
;; }
;; }
;; }
;
; 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: ...
;
define void @test2() {
entry:
br label %outermost.header
outermost.header: ; preds = %outermost.latch, %entry
%indvar.outermost = phi i32 [ 10, %entry ], [ %indvar.outermost.next, %outermost.latch ]
%0 = load i32, ptr @a, align 4
%tobool71.i = icmp eq i32 %0, 0
br label %middle.header
middle.header: ; preds = %middle.latch, %outermost.header
%indvar.middle = phi i64 [ 4, %outermost.header ], [ %indvar.middle.next, %middle.latch ]
br i1 %tobool71.i, label %innermost.preheader, label %middle.latch
innermost.preheader: ; preds = %middle.header
br label %innermost.body
innermost.body: ; preds = %innermost.preheader, %innermost.body
%indvar.innermost = phi i64 [ %indvar.innermost.next, %innermost.body ], [ 4, %innermost.preheader ]
%arrayidx9.i = getelementptr inbounds [1 x [6 x i32]], ptr @d, i64 0, i64 %indvar.innermost, i64 %indvar.middle
store i32 0, ptr %arrayidx9.i, align 4
%indvar.innermost.next = add nsw i64 %indvar.innermost, -1
%tobool5.i = icmp eq i64 %indvar.innermost.next, 0
br i1 %tobool5.i, label %innermost.loopexit, label %innermost.body
innermost.loopexit: ; preds = %innermost.body
br label %middle.latch
middle.latch: ; preds = %middle.latch.loopexit, %middle.header
%indvar.middle.next = add nsw i64 %indvar.middle, -1
%tobool2.i = icmp eq i64 %indvar.middle.next, 0
br i1 %tobool2.i, label %outermost.latch, label %middle.header
outermost.latch: ; preds = %middle.latch
%indvar.outermost.next = add nsw i32 %indvar.outermost, -5
%tobool.i = icmp eq i32 %indvar.outermost.next, 0
br i1 %tobool.i, label %outermost.exit, label %outermost.header
outermost.exit: ; preds = %outermost.latch
ret void
}
|
