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
|
; RUN: llc < %s --mtriple=wasm32-unknown-emscripten -asm-verbose=false -relocation-model=pic -fast-isel -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s -check-prefixes=PIC,CHECK -DPTR=i32
; RUN: llc < %s --mtriple=wasm32-unknown-emscripten -asm-verbose=false -relocation-model=pic -fast-isel=false -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s -check-prefixes=PIC,CHECK -DPTR=i32
; RUN: llc < %s --mtriple=wasm64-unknown-emscripten -asm-verbose=false -relocation-model=pic -fast-isel -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s -check-prefixes=PIC,CHECK -DPTR=i64
; RUN: llc < %s --mtriple=wasm64-unknown-emscripten -asm-verbose=false -relocation-model=pic -fast-isel=false -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s -check-prefixes=PIC,CHECK -DPTR=i64
; Test that globals assemble as expected with -fPIC.
; We test here both with and without fast-isel.
@hidden_global = external hidden global i32
@hidden_global_array = external hidden global [10 x i32]
@external_global = external global i32
@external_global_array = external global [10 x i32]
; PIC: .globaltype __memory_base, [[PTR]]
declare i32 @foo();
; For hidden symbols PIC code needs to offset all loads and stores
; by the value of the __memory_base global
define i32 @load_hidden_global() {
; CHECK-LABEL: load_hidden_global:
; PIC: global.get $push[[L0:[0-9]+]]=, __memory_base{{$}}
; PIC-NEXT: [[PTR]].const $push[[L1:[0-9]+]]=, hidden_global@MBREL{{$}}
; PIC-NEXT: [[PTR]].add $push[[L2:[0-9]+]]=, $pop[[L0]], $pop[[L1]]{{$}}
; PIC-NEXT: i32.load $push[[L3:[0-9]+]]=, 0($pop[[L2]]){{$}}
; CHECK-NEXT: end_function
%1 = load i32, ptr @hidden_global
ret i32 %1
}
define i32 @load_hidden_global_offset() {
; CHECK-LABEL: load_hidden_global_offset:
; PIC: global.get $push[[L0:[0-9]+]]=, __memory_base{{$}}
; PIC-NEXT: [[PTR]].const $push[[L1:[0-9]+]]=, hidden_global_array@MBREL{{$}}
; PIC-NEXT: [[PTR]].add $push[[L2:[0-9]+]]=, $pop[[L0]], $pop[[L1:[0-9]+]]{{$}}
; PIC-NEXT: [[PTR]].const $push[[L3:[0-9]+]]=, 20{{$}}
; PIC-NEXT: [[PTR]].add $push[[L4:[0-9]+]]=, $pop[[L2]], $pop[[L3]]{{$}}
; PIC-NEXT: i32.load $push{{[0-9]+}}=, 0($pop[[L4]]){{$}}
; CHECK-NEXT: end_function
%1 = getelementptr [10 x i32], ptr @hidden_global_array, i32 0, i32 5
%2 = load i32, ptr %1
ret i32 %2
}
; Store to a hidden global
define void @store_hidden_global(i32 %n) {
; CHECK-LABEL: store_hidden_global:
; PIC: global.get $push[[L0:[0-9]+]]=, __memory_base{{$}}
; PIC-NEXT: [[PTR]].const $push[[L1:[0-9]+]]=, hidden_global@MBREL{{$}}
; PIC-NEXT: [[PTR]].add $push[[L2:[0-9]+]]=, $pop[[L0]], $pop[[L1]]{{$}}
; PIC-NEXT: i32.store 0($pop[[L2]]), $0{{$}}
; CHECK-NEXT: end_function
store i32 %n, ptr @hidden_global
ret void
}
define void @store_hidden_global_offset(i32 %n) {
; CHECK-LABEL: store_hidden_global_offset:
; PIC: global.get $push[[L0:[0-9]+]]=, __memory_base{{$}}
; PIC-NEXT: [[PTR]].const $push[[L1:[0-9]+]]=, hidden_global_array@MBREL{{$}}
; PIC-NEXT: [[PTR]].add $push[[L2:[0-9]+]]=, $pop[[L0]], $pop[[L1]]{{$}}
; PIC-NEXT: [[PTR]].const $push[[L3:[0-9]+]]=, 20{{$}}
; PIC-NEXT: [[PTR]].add $push[[L4:[0-9]+]]=, $pop[[L2]], $pop[[L3]]{{$}}
; PIC-NEXT: i32.store 0($pop[[L4]]), $0{{$}}
; CHECK-NEXT: end_function
%1 = getelementptr [10 x i32], ptr @hidden_global_array, i32 0, i32 5
store i32 %n, ptr %1
ret void
}
; For non-hidden globals PIC code has to load the address from a wasm global
; using the @GOT relocation type.
define i32 @load_external_global() {
; CHECK-LABEL: load_external_global:
; PIC: global.get $push[[L0:[0-9]+]]=, external_global@GOT{{$}}
; PIC-NEXT: i32.load $push{{[0-9]+}}=, 0($pop[[L0]]){{$}}
; CHECK-NEXT: end_function
%1 = load i32, ptr @external_global
ret i32 %1
}
define i32 @load_external_global_offset() {
; CHECK-LABEL: load_external_global_offset:
; PIC: global.get $push[[L0:[0-9]+]]=, external_global_array@GOT{{$}}
; PIC-NEXT: [[PTR]].const $push[[L1:[0-9]+]]=, 20{{$}}
; PIC-NEXT: [[PTR]].add $push[[L2:[0-9]+]]=, $pop[[L0]], $pop[[L1]]{{$}}
; PIC-NEXT: i32.load $push{{[0-9]+}}=, 0($pop[[L2]]){{$}}
; CHECK-NEXT: end_function
%1 = getelementptr [10 x i32], ptr @external_global_array, i32 0, i32 5
%2 = load i32, ptr %1
ret i32 %2
}
; Store to a non-hidden global via the wasm global.
define void @store_external_global(i32 %n) {
; CHECK-LABEL: store_external_global:
; PIC: global.get $push[[L0:[0-9]+]]=, external_global@GOT{{$}}
; PIC-NEXT: i32.store 0($pop[[L0]]), $0{{$}}
; CHECK-NEXT: end_function
store i32 %n, ptr @external_global
ret void
}
define void @store_external_global_offset(i32 %n) {
; CHECK-LABEL: store_external_global_offset:
; PIC: global.get $push[[L0:[0-9]+]]=, external_global_array@GOT{{$}}
; PIC-NEXT: [[PTR]].const $push[[L1:[0-9]+]]=, 20{{$}}
; PIC-NEXT: [[PTR]].add $push[[L2:[0-9]+]]=, $pop[[L0]], $pop[[L1]]{{$}}
; PIC-NEXT: i32.store 0($pop[[L2]]), $0{{$}}
; CHECK-NEXT: end_function
%1 = getelementptr [10 x i32], ptr @external_global_array, i32 0, i32 5
store i32 %n, ptr %1
ret void
}
|
