blob: 725ab6e5e346825a05bdffa63bd1a5072f8274e9 (
plain)
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
|
; RUN: opt < %s -basicaa -dse -S | FileCheck %s
; CHECK-LABEL: void @skipBarrier(i8* %ptr)
define void @skipBarrier(i8* %ptr) {
; CHECK-NOT: store i8 42
store i8 42, i8* %ptr
; CHECK: %ptr2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr)
%ptr2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr)
; CHECK: store i8 43
store i8 43, i8* %ptr2
ret void
}
; CHECK-LABEL: void @skip2Barriers(i8* %ptr)
define void @skip2Barriers(i8* %ptr) {
; CHECK-NOT: store i8 42
store i8 42, i8* %ptr
; CHECK: %ptr2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr)
%ptr2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr)
; CHECK-NOT: store i8 43
store i8 43, i8* %ptr2
%ptr3 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr2)
%ptr4 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr3)
; CHECK: store i8 44
store i8 44, i8* %ptr4
ret void
}
; CHECK-LABEL: void @skip3Barriers(i8* %ptr)
define void @skip3Barriers(i8* %ptr) {
; CHECK-NOT: store i8 42
store i8 42, i8* %ptr
; CHECK: %ptr2 = call i8* @llvm.strip.invariant.group.p0i8(i8* %ptr)
%ptr2 = call i8* @llvm.strip.invariant.group.p0i8(i8* %ptr)
; CHECK-NOT: store i8 43
store i8 43, i8* %ptr2
%ptr3 = call i8* @llvm.strip.invariant.group.p0i8(i8* %ptr2)
%ptr4 = call i8* @llvm.strip.invariant.group.p0i8(i8* %ptr3)
; CHECK: store i8 44
store i8 44, i8* %ptr4
ret void
}
; CHECK-LABEL: void @skip4Barriers(i8* %ptr)
define void @skip4Barriers(i8* %ptr) {
; CHECK-NOT: store i8 42
store i8 42, i8* %ptr
; CHECK: %ptr2 = call i8* @llvm.strip.invariant.group.p0i8(i8* %ptr)
%ptr2 = call i8* @llvm.strip.invariant.group.p0i8(i8* %ptr)
; CHECK-NOT: store i8 43
store i8 43, i8* %ptr2
%ptr3 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr2)
%ptr4 = call i8* @llvm.strip.invariant.group.p0i8(i8* %ptr3)
%ptr5 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr3)
; CHECK: store i8 44
store i8 44, i8* %ptr5
ret void
}
declare i8* @llvm.launder.invariant.group.p0i8(i8*)
declare i8* @llvm.strip.invariant.group.p0i8(i8*)
|
