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
|
; RUN: opt -aa-pipeline=basic-aa -passes='print<memoryssa>,verify<memoryssa>' -disable-output < %s 2>&1 | FileCheck %s
;
; Testing many dominators, specifically from a switch statement in C.
declare i1 @getBool() readnone
define i32 @foo(i32* %p) {
entry:
br label %loopbegin
loopbegin:
; CHECK: 8 = MemoryPhi({entry,liveOnEntry},{sw.epilog,6})
; CHECK-NEXT: %n =
%n = phi i32 [ 0, %entry ], [ %1, %sw.epilog ]
%m = alloca i32, align 4
switch i32 %n, label %sw.default [
i32 0, label %sw.bb
i32 1, label %sw.bb1
i32 2, label %sw.bb2
i32 3, label %sw.bb3
]
sw.bb:
; CHECK: 1 = MemoryDef(8)
; CHECK-NEXT: store i32 1
store i32 1, i32* %m, align 4
br label %sw.epilog
sw.bb1:
; CHECK: 2 = MemoryDef(8)
; CHECK-NEXT: store i32 2
store i32 2, i32* %m, align 4
br label %sw.epilog
sw.bb2:
; CHECK: 3 = MemoryDef(8)
; CHECK-NEXT: store i32 3
store i32 3, i32* %m, align 4
br label %sw.epilog
sw.bb3:
; CHECK: 4 = MemoryDef(8)
; CHECK-NEXT: store i32 4
store i32 4, i32* %m, align 4
br label %sw.epilog
sw.default:
; CHECK: 5 = MemoryDef(8)
; CHECK-NEXT: store i32 5
store i32 5, i32* %m, align 4
br label %sw.epilog
sw.epilog:
; CHECK: 7 = MemoryPhi({sw.default,5},{sw.bb,1},{sw.bb1,2},{sw.bb2,3},{sw.bb3,4})
; CHECK-NEXT: MemoryUse(7)
; CHECK-NEXT: %0 =
%0 = load i32, i32* %m, align 4
; CHECK: 6 = MemoryDef(7)
; CHECK-NEXT: %1 =
%1 = load volatile i32, i32* %p, align 4
%2 = icmp eq i32 %0, %1
br i1 %2, label %exit, label %loopbegin
exit:
ret i32 %1
}
|
