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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
| ; RUN: opt -basicaa -loop-idiom < %s -S | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
; CHECK: @.memset_pattern = private unnamed_addr constant [4 x i32] [i32 2, i32 2, i32 2, i32 2], align 16
; CHECK: @.memset_pattern.1 = private unnamed_addr constant [4 x i32] [i32 2, i32 2, i32 2, i32 2], align 16
; CHECK: @.memset_pattern.2 = private unnamed_addr constant [4 x i32] [i32 2, i32 2, i32 2, i32 2], align 16
target triple = "x86_64-apple-darwin10.0.0"
%struct.foo = type { i32, i32 }
%struct.foo1 = type { i32, i32, i32 }
;void bar1(foo_t *f, unsigned n) {
; for (unsigned i = 0; i < n; ++i) {
; f[i].a = 2;
; f[i].b = 2;
; }
;}
define void @bar1(%struct.foo* %f, i32 %n) nounwind ssp {
entry:
%cmp1 = icmp eq i32 %n, 0
br i1 %cmp1, label %for.end, label %for.body.preheader
for.body.preheader: ; preds = %entry
br label %for.body
for.body: ; preds = %for.body.preheader, %for.body
%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
%a = getelementptr inbounds %struct.foo, %struct.foo* %f, i64 %indvars.iv, i32 0
store i32 2, i32* %a, align 4
%b = getelementptr inbounds %struct.foo, %struct.foo* %f, i64 %indvars.iv, i32 1
store i32 2, i32* %b, align 4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp ne i32 %lftr.wideiv, %n
br i1 %exitcond, label %for.body, label %for.end.loopexit
for.end.loopexit: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.end.loopexit, %entry
ret void
; CHECK-LABEL: @bar1(
; CHECK: call void @memset_pattern16
; CHECK-NOT: store
}
;void bar2(foo_t *f, unsigned n) {
; for (unsigned i = 0; i < n; ++i) {
; f[i].b = 2;
; f[i].a = 2;
; }
;}
define void @bar2(%struct.foo* %f, i32 %n) nounwind ssp {
entry:
%cmp1 = icmp eq i32 %n, 0
br i1 %cmp1, label %for.end, label %for.body.preheader
for.body.preheader: ; preds = %entry
br label %for.body
for.body: ; preds = %for.body.preheader, %for.body
%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
%b = getelementptr inbounds %struct.foo, %struct.foo* %f, i64 %indvars.iv, i32 1
store i32 2, i32* %b, align 4
%a = getelementptr inbounds %struct.foo, %struct.foo* %f, i64 %indvars.iv, i32 0
store i32 2, i32* %a, align 4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp ne i32 %lftr.wideiv, %n
br i1 %exitcond, label %for.body, label %for.end.loopexit
for.end.loopexit: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.end.loopexit, %entry
ret void
; CHECK-LABEL: @bar2(
; CHECK: call void @memset_pattern16
; CHECK-NOT: store
}
;void bar3(foo_t *f, unsigned n) {
; for (unsigned i = n; i > 0; --i) {
; f[i].a = 2;
; f[i].b = 2;
; }
;}
define void @bar3(%struct.foo* nocapture %f, i32 %n) nounwind ssp {
entry:
%cmp1 = icmp eq i32 %n, 0
br i1 %cmp1, label %for.end, label %for.body.preheader
for.body.preheader: ; preds = %entry
%0 = zext i32 %n to i64
br label %for.body
for.body: ; preds = %for.body.preheader, %for.body
%indvars.iv = phi i64 [ %0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
%a = getelementptr inbounds %struct.foo, %struct.foo* %f, i64 %indvars.iv, i32 0
store i32 2, i32* %a, align 4
%b = getelementptr inbounds %struct.foo, %struct.foo* %f, i64 %indvars.iv, i32 1
store i32 2, i32* %b, align 4
%1 = trunc i64 %indvars.iv to i32
%dec = add i32 %1, -1
%cmp = icmp eq i32 %dec, 0
%indvars.iv.next = add nsw i64 %indvars.iv, -1
br i1 %cmp, label %for.end.loopexit, label %for.body
for.end.loopexit: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.end.loopexit, %entry
ret void
; CHECK-LABEL: @bar3(
; CHECK: call void @memset_pattern16
; CHECK-NOT: store
}
;void bar4(foo_t *f, unsigned n) {
; for (unsigned i = 0; i < n; ++i) {
; f[i].a = 0;
; f[i].b = 1;
; }
;}
define void @bar4(%struct.foo* nocapture %f, i32 %n) nounwind ssp {
entry:
%cmp1 = icmp eq i32 %n, 0
br i1 %cmp1, label %for.end, label %for.body.preheader
for.body.preheader: ; preds = %entry
br label %for.body
for.body: ; preds = %for.body.preheader, %for.body
%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
%a = getelementptr inbounds %struct.foo, %struct.foo* %f, i64 %indvars.iv, i32 0
store i32 0, i32* %a, align 4
%b = getelementptr inbounds %struct.foo, %struct.foo* %f, i64 %indvars.iv, i32 1
store i32 1, i32* %b, align 4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp ne i32 %lftr.wideiv, %n
br i1 %exitcond, label %for.body, label %for.end.loopexit
for.end.loopexit: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.end.loopexit, %entry
ret void
; CHECK-LABEL: @bar4(
; CHECK-NOT: call void @memset_pattern16
}
;void bar5(foo1_t *f, unsigned n) {
; for (unsigned i = 0; i < n; ++i) {
; f[i].a = 1;
; f[i].b = 1;
; }
;}
define void @bar5(%struct.foo1* nocapture %f, i32 %n) nounwind ssp {
entry:
%cmp1 = icmp eq i32 %n, 0
br i1 %cmp1, label %for.end, label %for.body.preheader
for.body.preheader: ; preds = %entry
br label %for.body
for.body: ; preds = %for.body.preheader, %for.body
%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
%a = getelementptr inbounds %struct.foo1, %struct.foo1* %f, i64 %indvars.iv, i32 0
store i32 1, i32* %a, align 4
%b = getelementptr inbounds %struct.foo1, %struct.foo1* %f, i64 %indvars.iv, i32 1
store i32 1, i32* %b, align 4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp ne i32 %lftr.wideiv, %n
br i1 %exitcond, label %for.body, label %for.end.loopexit
for.end.loopexit: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.end.loopexit, %entry
ret void
; CHECK-LABEL: @bar5(
; CHECK-NOT: call void @memset_pattern16
}
|