unroll-pragmas-disabled.ll
5.93 KB
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
; RUN: opt < %s -loop-unroll -S | FileCheck %s
;
; Verify that the unrolling pass removes existing unroll count metadata
; and adds a disable unrolling node after unrolling is complete.
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
; #pragma clang loop vectorize(enable) unroll_count(4) vectorize_width(8)
;
; Unroll count metadata should be replaced with unroll(disable). Vectorize
; metadata should be untouched.
;
; CHECK-LABEL: @unroll_count_4(
; CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_1:.*]]
define void @unroll_count_4(i32* nocapture %a) {
entry:
br label %for.body
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
%0 = load i32, i32* %arrayidx, align 4
%inc = add nsw i32 %0, 1
store i32 %inc, i32* %arrayidx, align 4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp eq i64 %indvars.iv.next, 64
br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !1
for.end: ; preds = %for.body
ret void
}
!1 = !{!1, !2, !3, !4}
!2 = !{!"llvm.loop.vectorize.enable", i1 true}
!3 = !{!"llvm.loop.unroll.count", i32 4}
!4 = !{!"llvm.loop.vectorize.width", i32 8}
; #pragma clang loop unroll(full)
;
; An unroll disable metadata node is only added for the unroll count case.
; In this case, the loop has a full unroll metadata but can't be fully unrolled
; because the trip count is dynamic. The full unroll metadata should remain
; after unrolling.
;
; CHECK-LABEL: @unroll_full(
; CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_2:.*]]
define void @unroll_full(i32* nocapture %a, i32 %b) {
entry:
%cmp3 = icmp sgt i32 %b, 0
br i1 %cmp3, label %for.body, label %for.end, !llvm.loop !5
for.body: ; preds = %entry, %for.body
%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
%0 = load i32, i32* %arrayidx, align 4
%inc = add nsw i32 %0, 1
store i32 %inc, i32* %arrayidx, align 4
%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, %b
br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !5
for.end: ; preds = %for.body, %entry
ret void
}
!5 = !{!5, !6}
!6 = !{!"llvm.loop.unroll.full"}
; #pragma clang loop unroll(disable)
;
; Unroll metadata should not change.
;
; CHECK-LABEL: @unroll_disable(
; CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_3:.*]]
define void @unroll_disable(i32* nocapture %a) {
entry:
br label %for.body
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
%0 = load i32, i32* %arrayidx, align 4
%inc = add nsw i32 %0, 1
store i32 %inc, i32* %arrayidx, align 4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp eq i64 %indvars.iv.next, 64
br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !7
for.end: ; preds = %for.body
ret void
}
!7 = !{!7, !8}
!8 = !{!"llvm.loop.unroll.disable"}
; This function contains two loops which share the same llvm.loop metadata node
; with an llvm.loop.unroll.count 2 hint. Both loops should be unrolled. This
; verifies that adding disable metadata to a loop after unrolling doesn't affect
; other loops which previously shared the same llvm.loop metadata.
;
; CHECK-LABEL: @shared_metadata(
; CHECK: store i32
; CHECK: store i32
; CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_4:.*]]
; CHECK: store i32
; CHECK: store i32
; CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_5:.*]]
define void @shared_metadata(i32* nocapture %List) #0 {
entry:
br label %for.body3
for.body3: ; preds = %for.body3, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body3 ]
%arrayidx = getelementptr inbounds i32, i32* %List, i64 %indvars.iv
%0 = load i32, i32* %arrayidx, align 4
%add4 = add nsw i32 %0, 10
store i32 %add4, i32* %arrayidx, align 4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp eq i64 %indvars.iv.next, 4
br i1 %exitcond, label %for.body3.1.preheader, label %for.body3, !llvm.loop !9
for.body3.1.preheader: ; preds = %for.body3
br label %for.body3.1
for.body3.1: ; preds = %for.body3.1.preheader, %for.body3.1
%indvars.iv.1 = phi i64 [ %1, %for.body3.1 ], [ 0, %for.body3.1.preheader ]
%1 = add nsw i64 %indvars.iv.1, 1
%arrayidx.1 = getelementptr inbounds i32, i32* %List, i64 %1
%2 = load i32, i32* %arrayidx.1, align 4
%add4.1 = add nsw i32 %2, 10
store i32 %add4.1, i32* %arrayidx.1, align 4
%exitcond.1 = icmp eq i64 %1, 4
br i1 %exitcond.1, label %for.inc5.1, label %for.body3.1, !llvm.loop !9
for.inc5.1: ; preds = %for.body3.1
ret void
}
!9 = !{!9, !10}
!10 = !{!"llvm.loop.unroll.count", i32 2}
; CHECK: ![[LOOP_1]] = distinct !{![[LOOP_1]], ![[VEC_ENABLE:.*]], ![[WIDTH_8:.*]], ![[UNROLL_DISABLE:.*]]}
; CHECK: ![[VEC_ENABLE]] = !{!"llvm.loop.vectorize.enable", i1 true}
; CHECK: ![[WIDTH_8]] = !{!"llvm.loop.vectorize.width", i32 8}
; CHECK: ![[UNROLL_DISABLE]] = !{!"llvm.loop.unroll.disable"}
; CHECK: ![[LOOP_2]] = distinct !{![[LOOP_2]], ![[UNROLL_FULL:.*]]}
; CHECK: ![[UNROLL_FULL]] = !{!"llvm.loop.unroll.full"}
; CHECK: ![[LOOP_3]] = distinct !{![[LOOP_3]], ![[UNROLL_DISABLE:.*]]}
; CHECK: ![[LOOP_4]] = distinct !{![[LOOP_4]], ![[UNROLL_DISABLE:.*]]}
; CHECK: ![[LOOP_5]] = distinct !{![[LOOP_5]], ![[UNROLL_DISABLE:.*]]}