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
202
203
204
205
206
207
208
209
210
211
212
213
|
; Test that the inliner doesn't leave around dead allocas, and that it folds
; uncond branches away after it is done specializing.
; RUN: opt < %s -inline -S | FileCheck %s
@A = weak global i32 0 ; <i32*> [#uses=1]
@B = weak global i32 0 ; <i32*> [#uses=1]
@C = weak global i32 0 ; <i32*> [#uses=1]
define internal fastcc void @foo(i32 %X) {
entry:
%ALL = alloca i32, align 4 ; <i32*> [#uses=1]
%tmp1 = and i32 %X, 1 ; <i32> [#uses=1]
%tmp1.upgrd.1 = icmp eq i32 %tmp1, 0 ; <i1> [#uses=1]
br i1 %tmp1.upgrd.1, label %cond_next, label %cond_true
cond_true: ; preds = %entry
store i32 1, i32* @A
br label %cond_next
cond_next: ; preds = %cond_true, %entry
%tmp4 = and i32 %X, 2 ; <i32> [#uses=1]
%tmp4.upgrd.2 = icmp eq i32 %tmp4, 0 ; <i1> [#uses=1]
br i1 %tmp4.upgrd.2, label %cond_next7, label %cond_true5
cond_true5: ; preds = %cond_next
store i32 1, i32* @B
br label %cond_next7
cond_next7: ; preds = %cond_true5, %cond_next
%tmp10 = and i32 %X, 4 ; <i32> [#uses=1]
%tmp10.upgrd.3 = icmp eq i32 %tmp10, 0 ; <i1> [#uses=1]
br i1 %tmp10.upgrd.3, label %cond_next13, label %cond_true11
cond_true11: ; preds = %cond_next7
store i32 1, i32* @C
br label %cond_next13
cond_next13: ; preds = %cond_true11, %cond_next7
%tmp16 = and i32 %X, 8 ; <i32> [#uses=1]
%tmp16.upgrd.4 = icmp eq i32 %tmp16, 0 ; <i1> [#uses=1]
br i1 %tmp16.upgrd.4, label %UnifiedReturnBlock, label %cond_true17
cond_true17: ; preds = %cond_next13
call void @ext( i32* %ALL )
ret void
UnifiedReturnBlock: ; preds = %cond_next13
ret void
}
declare void @ext(i32*)
define void @test() {
; CHECK: @test
; CHECK-NOT: ret
;
; FIXME: This should be a CHECK-NOT, but currently we have a bug that causes us
; to not nuke unused allocas.
; CHECK: alloca
; CHECK-NOT: ret
;
; No branches should survive the inliner's cleanup.
; CHECK-NOT: br
; CHECK: ret void
entry:
tail call fastcc void @foo( i32 1 )
tail call fastcc void @foo( i32 2 )
tail call fastcc void @foo( i32 3 )
tail call fastcc void @foo( i32 8 )
ret void
}
declare void @f(i32 %x)
define void @inner2(i32 %x, i32 %y, i32 %z, i1 %b) {
entry:
%cmp1 = icmp ne i32 %x, 0
br i1 %cmp1, label %then1, label %end1
then1:
call void @f(i32 %x)
br label %end1
end1:
%x2 = and i32 %x, %z
%cmp2 = icmp sgt i32 %x2, 1
br i1 %cmp2, label %then2, label %end2
then2:
call void @f(i32 %x2)
br label %end2
end2:
%y2 = or i32 %y, %z
%cmp3 = icmp sgt i32 %y2, 0
br i1 %cmp3, label %then3, label %end3
then3:
call void @f(i32 %y2)
br label %end3
end3:
br i1 %b, label %end3.1, label %end3.2
end3.1:
%x3.1 = or i32 %x, 10
br label %end3.3
end3.2:
%x3.2 = or i32 %x, 10
br label %end3.3
end3.3:
%x3.3 = phi i32 [ %x3.1, %end3.1 ], [ %x3.2, %end3.2 ]
%cmp4 = icmp slt i32 %x3.3, 1
br i1 %cmp4, label %then4, label %end4
then4:
call void @f(i32 %x3.3)
br label %end4
end4:
ret void
}
define void @outer2(i32 %z, i1 %b) {
; Ensure that after inlining, none of the blocks with a call to @f actually
; make it through inlining.
; CHECK: define void @outer2
; CHECK-NOT: call
; CHECK: ret void
entry:
call void @inner2(i32 0, i32 -1, i32 %z, i1 %b)
ret void
}
define void @PR12470_inner(i16 signext %p1) nounwind uwtable {
entry:
br i1 undef, label %cond.true, label %cond.false
cond.true:
br label %cond.end
cond.false:
%conv = sext i16 %p1 to i32
br label %cond.end
cond.end:
%cond = phi i32 [ undef, %cond.true ], [ 0, %cond.false ]
%tobool = icmp eq i32 %cond, 0
br i1 %tobool, label %if.end5, label %if.then
if.then:
ret void
if.end5:
ret void
}
define void @PR12470_outer() {
; This previously crashed during inliner cleanup and folding inner return
; instructions. Check that we don't crash and we produce a function with a single
; return instruction due to merging the returns of the inlined function.
; CHECK: define void @PR12470_outer
; CHECK-NOT: call
; CHECK: ret void
; CHECK-NOT: ret void
; CHECK: }
entry:
call void @PR12470_inner(i16 signext 1)
ret void
}
define void @crasher_inner() nounwind uwtable {
entry:
br i1 false, label %for.end28, label %for.body6
for.body6:
br i1 undef, label %for.body6, label %for.cond12.for.inc26_crit_edge
for.cond12.for.inc26_crit_edge:
br label %for.body6.1
for.end28:
ret void
for.body6.1:
br i1 undef, label %for.body6.1, label %for.cond12.for.inc26_crit_edge.1
for.cond12.for.inc26_crit_edge.1:
br label %for.body6.2
for.body6.2:
br i1 undef, label %for.body6.2, label %for.cond12.for.inc26_crit_edge.2
for.cond12.for.inc26_crit_edge.2:
br label %for.end28
}
define void @crasher_outer() {
; CHECK: @crasher_outer
; CHECK-NOT: call
; CHECK: ret void
; CHECK-NOT: ret
; CHECK: }
entry:
tail call void @crasher_inner()
ret void
}
|
