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
|
; RUN: llc -O3 -mtriple arm64-apple-ios3 -aarch64-gep-opt=false %s -o - | FileCheck %s
; <rdar://problem/13621857>
@block = common global i8* null, align 8
define i32 @fct(i32 %i1, i32 %i2) {
; CHECK: @fct
; Sign extension is used more than once, thus it should not be folded.
; CodeGenPrepare is not sharing sext across uses, thus this is folded because
; of that.
; _CHECK-NOT_: , sxtw]
entry:
%idxprom = sext i32 %i1 to i64
%0 = load i8** @block, align 8
%arrayidx = getelementptr inbounds i8* %0, i64 %idxprom
%1 = load i8* %arrayidx, align 1
%idxprom1 = sext i32 %i2 to i64
%arrayidx2 = getelementptr inbounds i8* %0, i64 %idxprom1
%2 = load i8* %arrayidx2, align 1
%cmp = icmp eq i8 %1, %2
br i1 %cmp, label %if.end, label %if.then
if.then: ; preds = %entry
%cmp7 = icmp ugt i8 %1, %2
%conv8 = zext i1 %cmp7 to i32
br label %return
if.end: ; preds = %entry
%inc = add nsw i32 %i1, 1
%inc9 = add nsw i32 %i2, 1
%idxprom10 = sext i32 %inc to i64
%arrayidx11 = getelementptr inbounds i8* %0, i64 %idxprom10
%3 = load i8* %arrayidx11, align 1
%idxprom12 = sext i32 %inc9 to i64
%arrayidx13 = getelementptr inbounds i8* %0, i64 %idxprom12
%4 = load i8* %arrayidx13, align 1
%cmp16 = icmp eq i8 %3, %4
br i1 %cmp16, label %if.end23, label %if.then18
if.then18: ; preds = %if.end
%cmp21 = icmp ugt i8 %3, %4
%conv22 = zext i1 %cmp21 to i32
br label %return
if.end23: ; preds = %if.end
%inc24 = add nsw i32 %i1, 2
%inc25 = add nsw i32 %i2, 2
%idxprom26 = sext i32 %inc24 to i64
%arrayidx27 = getelementptr inbounds i8* %0, i64 %idxprom26
%5 = load i8* %arrayidx27, align 1
%idxprom28 = sext i32 %inc25 to i64
%arrayidx29 = getelementptr inbounds i8* %0, i64 %idxprom28
%6 = load i8* %arrayidx29, align 1
%cmp32 = icmp eq i8 %5, %6
br i1 %cmp32, label %return, label %if.then34
if.then34: ; preds = %if.end23
%cmp37 = icmp ugt i8 %5, %6
%conv38 = zext i1 %cmp37 to i32
br label %return
return: ; preds = %if.end23, %if.then34, %if.then18, %if.then
%retval.0 = phi i32 [ %conv8, %if.then ], [ %conv22, %if.then18 ], [ %conv38, %if.then34 ], [ 1, %if.end23 ]
ret i32 %retval.0
}
define i32 @fct1(i32 %i1, i32 %i2) optsize {
; CHECK: @fct1
; Addressing are folded when optimizing for code size.
; CHECK: , sxtw]
; CHECK: , sxtw]
entry:
%idxprom = sext i32 %i1 to i64
%0 = load i8** @block, align 8
%arrayidx = getelementptr inbounds i8* %0, i64 %idxprom
%1 = load i8* %arrayidx, align 1
%idxprom1 = sext i32 %i2 to i64
%arrayidx2 = getelementptr inbounds i8* %0, i64 %idxprom1
%2 = load i8* %arrayidx2, align 1
%cmp = icmp eq i8 %1, %2
br i1 %cmp, label %if.end, label %if.then
if.then: ; preds = %entry
%cmp7 = icmp ugt i8 %1, %2
%conv8 = zext i1 %cmp7 to i32
br label %return
if.end: ; preds = %entry
%inc = add nsw i32 %i1, 1
%inc9 = add nsw i32 %i2, 1
%idxprom10 = sext i32 %inc to i64
%arrayidx11 = getelementptr inbounds i8* %0, i64 %idxprom10
%3 = load i8* %arrayidx11, align 1
%idxprom12 = sext i32 %inc9 to i64
%arrayidx13 = getelementptr inbounds i8* %0, i64 %idxprom12
%4 = load i8* %arrayidx13, align 1
%cmp16 = icmp eq i8 %3, %4
br i1 %cmp16, label %if.end23, label %if.then18
if.then18: ; preds = %if.end
%cmp21 = icmp ugt i8 %3, %4
%conv22 = zext i1 %cmp21 to i32
br label %return
if.end23: ; preds = %if.end
%inc24 = add nsw i32 %i1, 2
%inc25 = add nsw i32 %i2, 2
%idxprom26 = sext i32 %inc24 to i64
%arrayidx27 = getelementptr inbounds i8* %0, i64 %idxprom26
%5 = load i8* %arrayidx27, align 1
%idxprom28 = sext i32 %inc25 to i64
%arrayidx29 = getelementptr inbounds i8* %0, i64 %idxprom28
%6 = load i8* %arrayidx29, align 1
%cmp32 = icmp eq i8 %5, %6
br i1 %cmp32, label %return, label %if.then34
if.then34: ; preds = %if.end23
%cmp37 = icmp ugt i8 %5, %6
%conv38 = zext i1 %cmp37 to i32
br label %return
return: ; preds = %if.end23, %if.then34, %if.then18, %if.then
%retval.0 = phi i32 [ %conv8, %if.then ], [ %conv22, %if.then18 ], [ %conv38, %if.then34 ], [ 1, %if.end23 ]
ret i32 %retval.0
}
; CHECK: @test
; CHECK-NOT: , uxtw #2]
define i32 @test(i32* %array, i8 zeroext %c, i32 %arg) {
entry:
%conv = zext i8 %c to i32
%add = sub i32 0, %arg
%tobool = icmp eq i32 %conv, %add
br i1 %tobool, label %if.end, label %if.then
if.then: ; preds = %entry
%idxprom = zext i8 %c to i64
%arrayidx = getelementptr inbounds i32* %array, i64 %idxprom
%0 = load volatile i32* %arrayidx, align 4
%1 = load volatile i32* %arrayidx, align 4
%add3 = add nsw i32 %1, %0
br label %if.end
if.end: ; preds = %entry, %if.then
%res.0 = phi i32 [ %add3, %if.then ], [ 0, %entry ]
ret i32 %res.0
}
; CHECK: @test2
; CHECK: , uxtw #2]
; CHECK: , uxtw #2]
define i32 @test2(i32* %array, i8 zeroext %c, i32 %arg) optsize {
entry:
%conv = zext i8 %c to i32
%add = sub i32 0, %arg
%tobool = icmp eq i32 %conv, %add
br i1 %tobool, label %if.end, label %if.then
if.then: ; preds = %entry
%idxprom = zext i8 %c to i64
%arrayidx = getelementptr inbounds i32* %array, i64 %idxprom
%0 = load volatile i32* %arrayidx, align 4
%1 = load volatile i32* %arrayidx, align 4
%add3 = add nsw i32 %1, %0
br label %if.end
if.end: ; preds = %entry, %if.then
%res.0 = phi i32 [ %add3, %if.then ], [ 0, %entry ]
ret i32 %res.0
}
|
