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
|
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=aarch64-apple-ios \
; RUN: -aarch64-enable-collect-loh=false -aarch64-enable-global-merge \
; RUN: -global-merge-group-by-use -global-merge-ignore-single-use=false %s \
; RUN: -o - | FileCheck %s
; We assume that globals of the same size aren't reordered inside a set.
; Check that we create two MergedGlobal instances for two functions using
; disjoint sets of globals
@m1 = internal global i32 0, align 4
@n1 = internal global i32 0, align 4
define void @f1(i32 %a1, i32 %a2) #0 {
; CHECK-LABEL: f1:
; CHECK: ; %bb.0:
; CHECK-NEXT: adrp x8, __MergedGlobals.2@PAGE
; CHECK-NEXT: add x8, x8, __MergedGlobals.2@PAGEOFF
; CHECK-NEXT: stp w0, w1, [x8]
; CHECK-NEXT: ret
store i32 %a1, ptr @m1, align 4
store i32 %a2, ptr @n1, align 4
ret void
}
@m2 = internal global i32 0, align 4
@n2 = internal global i32 0, align 4
@o2 = internal global i32 0, align 4
define void @f2(i32 %a1, i32 %a2, i32 %a3) #0 {
; CHECK-LABEL: f2:
; CHECK: ; %bb.0:
; CHECK-NEXT: adrp x8, __MergedGlobals.1@PAGE
; CHECK-NEXT: add x8, x8, __MergedGlobals.1@PAGEOFF
; CHECK-NEXT: stp w0, w1, [x8]
; CHECK-NEXT: str w2, [x8, #8]
; CHECK-NEXT: ret
store i32 %a1, ptr @m2, align 4
store i32 %a2, ptr @n2, align 4
store i32 %a3, ptr @o2, align 4
ret void
}
; Sanity-check (don't worry about cost models) that we pick the biggest subset
; of all global used "together" directly or indirectly. Here, that means
; merging n3, m4, and n4 together, but ignoring m3.
@m3 = internal global i32 0, align 4
@n3 = internal global i32 0, align 4
define void @f3(i32 %a1, i32 %a2) #0 {
; CHECK-LABEL: f3:
; CHECK: ; %bb.0:
; CHECK-NEXT: adrp x8, _m3@PAGE
; CHECK-NEXT: adrp x9, __MergedGlobals@PAGE
; CHECK-NEXT: str w0, [x8, _m3@PAGEOFF]
; CHECK-NEXT: str w1, [x9, __MergedGlobals@PAGEOFF]
; CHECK-NEXT: ret
store i32 %a1, ptr @m3, align 4
store i32 %a2, ptr @n3, align 4
ret void
}
@m4 = internal global i32 0, align 4
@n4 = internal global i32 0, align 4
define void @f4(i32 %a1, i32 %a2, i32 %a3) #0 {
; CHECK-LABEL: f4:
; CHECK: ; %bb.0:
; CHECK-NEXT: adrp x8, __MergedGlobals@PAGE
; CHECK-NEXT: add x8, x8, __MergedGlobals@PAGEOFF
; CHECK-NEXT: stp w0, w1, [x8, #4]
; CHECK-NEXT: str w2, [x8]
; CHECK-NEXT: ret
store i32 %a1, ptr @m4, align 4
store i32 %a2, ptr @n4, align 4
store i32 %a3, ptr @n3, align 4
ret void
}
; Finally, check that we don't do anything with one-element global sets.
@o5 = internal global i32 0, align 4
define void @f5(i32 %a1) #0 {
; CHECK-LABEL: f5:
; CHECK: ; %bb.0:
; CHECK-NEXT: adrp x8, _o5@PAGE
; CHECK-NEXT: str w0, [x8, _o5@PAGEOFF]
; CHECK-NEXT: ret
store i32 %a1, ptr @o5, align 4
ret void
}
; CHECK-DAG: .zerofill __DATA,__bss,_o5,4,2
; CHECK-DAG: .zerofill __DATA,__bss,__MergedGlobals.2,8,2
; CHECK-DAG: .zerofill __DATA,__bss,__MergedGlobals.1,12,2
; CHECK-DAG: .zerofill __DATA,__bss,__MergedGlobals,12,2
attributes #0 = { nounwind }
|
