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
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
; RUN: opt -passes='simplifycfg<sink-common-insts;hoist-common-insts>,verify' -S %s | FileCheck %s
declare void @clobber1()
declare void @clobber2()
; Do not try to sink the stores to the exit block, as this requires introducing
; a select for the pointer operand. This is not allowed for swifterror pointers.
define swiftcc void @sink(ptr %arg, ptr swifterror %arg1, i1 %c) {
; CHECK-LABEL: define swiftcc void @sink
; CHECK-SAME: (ptr [[ARG:%.*]], ptr swifterror [[ARG1:%.*]], i1 [[C:%.*]]) {
; CHECK-NEXT: bb:
; CHECK-NEXT: br i1 [[C]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: call void @clobber1()
; CHECK-NEXT: store ptr null, ptr [[ARG]], align 8
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: else:
; CHECK-NEXT: call void @clobber2()
; CHECK-NEXT: store ptr null, ptr [[ARG1]], align 8
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
bb:
br i1 %c, label %then, label %else
then:
call void @clobber1()
store ptr null, ptr %arg, align 8
br label %exit
else:
call void @clobber2()
store ptr null, ptr %arg1, align 8
br label %exit
exit:
ret void
}
define swiftcc void @hoist_store(ptr %arg, ptr swifterror %arg1, i1 %c) {
; CHECK-LABEL: define swiftcc void @hoist_store
; CHECK-SAME: (ptr [[ARG:%.*]], ptr swifterror [[ARG1:%.*]], i1 [[C:%.*]]) {
; CHECK-NEXT: bb:
; CHECK-NEXT: br i1 [[C]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: store ptr null, ptr [[ARG]], align 8
; CHECK-NEXT: call void @clobber1()
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: else:
; CHECK-NEXT: store ptr null, ptr [[ARG1]], align 8
; CHECK-NEXT: call void @clobber2()
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
bb:
br i1 %c, label %then, label %else
then:
store ptr null, ptr %arg, align 8
call void @clobber1()
br label %exit
else:
store ptr null, ptr %arg1, align 8
call void @clobber2()
br label %exit
exit:
ret void
}
; FIXME: currently simplifycfg tries to sink the load to the exit block and
; introduces a select for the pointer operand. This is not allowed for
; swifterror pointers.
define swiftcc ptr @sink_load(ptr %arg, ptr swifterror %arg1, i1 %c) {
bb:
br i1 %c, label %then, label %else
then:
call void @clobber1()
%l1 = load ptr, ptr %arg, align 8
br label %exit
else:
call void @clobber2()
%l2 = load ptr, ptr %arg1, align 8
br label %exit
exit:
%p = phi ptr [ %l1, %then ], [ %l2, %else ]
ret ptr %p
}
define swiftcc ptr @hoist_load(ptr %arg, ptr swifterror %arg1, i1 %c) {
; CHECK-LABEL: define swiftcc ptr @hoist_load
; CHECK-SAME: (ptr [[ARG:%.*]], ptr swifterror [[ARG1:%.*]], i1 [[C:%.*]]) {
; CHECK-NEXT: bb:
; CHECK-NEXT: br i1 [[C]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[L1:%.*]] = load ptr, ptr [[ARG]], align 8
; CHECK-NEXT: call void @clobber1()
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: else:
; CHECK-NEXT: [[L2:%.*]] = load ptr, ptr [[ARG1]], align 8
; CHECK-NEXT: call void @clobber2()
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[P:%.*]] = phi ptr [ [[L1]], [[THEN]] ], [ [[L2]], [[ELSE]] ]
; CHECK-NEXT: ret ptr [[P]]
;
bb:
br i1 %c, label %then, label %else
then:
%l1 = load ptr, ptr %arg, align 8
call void @clobber1()
br label %exit
else:
%l2 = load ptr, ptr %arg1, align 8
call void @clobber2()
br label %exit
exit:
%p = phi ptr [ %l1, %then ], [ %l2, %else ]
ret ptr %p
}
|
