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
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
; RUN: opt -S -basicaa -licm < %s | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
; Make sure the basic alloca pointer hoisting works:
; CHECK-LABEL: @test1
; CHECK: load i32* %c, align 4
; CHECK: for.body:
; Function Attrs: nounwind uwtable
define void @test1(i32* nocapture %a, i32* nocapture readonly %b, i32 %n) #0 {
entry:
%cmp6 = icmp sgt i32 %n, 0
%c = alloca i32
br i1 %cmp6, label %for.body, label %for.end
for.body: ; preds = %entry, %for.inc
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
%arrayidx = getelementptr inbounds i32* %a, i64 %indvars.iv
%0 = load i32* %arrayidx, align 4
%cmp1 = icmp sgt i32 %0, 0
br i1 %cmp1, label %if.then, label %for.inc
if.then: ; preds = %for.body
%1 = load i32* %c, align 4
%arrayidx3 = getelementptr inbounds i32* %b, i64 %indvars.iv
%2 = load i32* %arrayidx3, align 4
%mul = mul nsw i32 %2, %1
store i32 %mul, i32* %arrayidx, align 4
br label %for.inc
for.inc: ; preds = %for.body, %if.then
%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.end, label %for.body
for.end: ; preds = %for.inc, %entry
ret void
}
; Make sure the basic alloca pointer hoisting works through a bitcast to a
; pointer to a smaller type:
; CHECK-LABEL: @test2
; CHECK: load i32* %c, align 4
; CHECK: for.body:
; Function Attrs: nounwind uwtable
define void @test2(i32* nocapture %a, i32* nocapture readonly %b, i32 %n) #0 {
entry:
%cmp6 = icmp sgt i32 %n, 0
%ca = alloca i64
%c = bitcast i64* %ca to i32*
br i1 %cmp6, label %for.body, label %for.end
for.body: ; preds = %entry, %for.inc
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
%arrayidx = getelementptr inbounds i32* %a, i64 %indvars.iv
%0 = load i32* %arrayidx, align 4
%cmp1 = icmp sgt i32 %0, 0
br i1 %cmp1, label %if.then, label %for.inc
if.then: ; preds = %for.body
%1 = load i32* %c, align 4
%arrayidx3 = getelementptr inbounds i32* %b, i64 %indvars.iv
%2 = load i32* %arrayidx3, align 4
%mul = mul nsw i32 %2, %1
store i32 %mul, i32* %arrayidx, align 4
br label %for.inc
for.inc: ; preds = %for.body, %if.then
%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.end, label %for.body
for.end: ; preds = %for.inc, %entry
ret void
}
; Make sure the basic alloca pointer hoisting works through a bitcast to a
; pointer to a smaller type (where the bitcast also needs to be hoisted):
; CHECK-LABEL: @test3
; CHECK: load i32* %c, align 4
; CHECK: for.body:
; Function Attrs: nounwind uwtable
define void @test3(i32* nocapture %a, i32* nocapture readonly %b, i32 %n) #0 {
entry:
%cmp6 = icmp sgt i32 %n, 0
%ca = alloca i64
br i1 %cmp6, label %for.body, label %for.end
for.body: ; preds = %entry, %for.inc
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
%arrayidx = getelementptr inbounds i32* %a, i64 %indvars.iv
%0 = load i32* %arrayidx, align 4
%cmp1 = icmp sgt i32 %0, 0
br i1 %cmp1, label %if.then, label %for.inc
if.then: ; preds = %for.body
%c = bitcast i64* %ca to i32*
%1 = load i32* %c, align 4
%arrayidx3 = getelementptr inbounds i32* %b, i64 %indvars.iv
%2 = load i32* %arrayidx3, align 4
%mul = mul nsw i32 %2, %1
store i32 %mul, i32* %arrayidx, align 4
br label %for.inc
for.inc: ; preds = %for.body, %if.then
%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.end, label %for.body
for.end: ; preds = %for.inc, %entry
ret void
}
; Make sure the basic alloca pointer hoisting does not happen through a bitcast
; to a pointer to a larger type:
; CHECK-LABEL: @test4
; CHECK: for.body:
; CHECK: load i32* %c, align 4
; Function Attrs: nounwind uwtable
define void @test4(i32* nocapture %a, i32* nocapture readonly %b, i32 %n) #0 {
entry:
%cmp6 = icmp sgt i32 %n, 0
%ca = alloca i16
%c = bitcast i16* %ca to i32*
br i1 %cmp6, label %for.body, label %for.end
for.body: ; preds = %entry, %for.inc
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
%arrayidx = getelementptr inbounds i32* %a, i64 %indvars.iv
%0 = load i32* %arrayidx, align 4
%cmp1 = icmp sgt i32 %0, 0
br i1 %cmp1, label %if.then, label %for.inc
if.then: ; preds = %for.body
%1 = load i32* %c, align 4
%arrayidx3 = getelementptr inbounds i32* %b, i64 %indvars.iv
%2 = load i32* %arrayidx3, align 4
%mul = mul nsw i32 %2, %1
store i32 %mul, i32* %arrayidx, align 4
br label %for.inc
for.inc: ; preds = %for.body, %if.then
%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.end, label %for.body
for.end: ; preds = %for.inc, %entry
ret void
}
; Don't crash on bitcasts to unsized types.
; CHECK-LABEL: @test5
; CHECK: for.body:
; CHECK: load i32* %c, align 4
%atype = type opaque
; Function Attrs: nounwind uwtable
define void @test5(i32* nocapture %a, i32* nocapture readonly %b, i32 %n) #0 {
entry:
%cmp6 = icmp sgt i32 %n, 0
%ca = alloca i16
%cab = bitcast i16* %ca to %atype*
%c = bitcast %atype* %cab to i32*
br i1 %cmp6, label %for.body, label %for.end
for.body: ; preds = %entry, %for.inc
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
%arrayidx = getelementptr inbounds i32* %a, i64 %indvars.iv
%0 = load i32* %arrayidx, align 4
%cmp1 = icmp sgt i32 %0, 0
br i1 %cmp1, label %if.then, label %for.inc
if.then: ; preds = %for.body
%1 = load i32* %c, align 4
%arrayidx3 = getelementptr inbounds i32* %b, i64 %indvars.iv
%2 = load i32* %arrayidx3, align 4
%mul = mul nsw i32 %2, %1
store i32 %mul, i32* %arrayidx, align 4
br label %for.inc
for.inc: ; preds = %for.body, %if.then
%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.end, label %for.body
for.end: ; preds = %for.inc, %entry
ret void
}
attributes #0 = { nounwind uwtable }
|
