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
/*
* Copyright 2017 WebAssembly Community Group participants
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef wasm_ir_global_h
#define wasm_ir_global_h
#include <algorithm>
#include <vector>
#include "ir/iteration.h"
#include "ir/module-utils.h"
#include "literal.h"
#include "wasm.h"
namespace wasm::GlobalUtils {
// find a global initialized to the value of an import, or null if no such
// global
inline Global*
getGlobalInitializedToImport(Module& wasm, Name module, Name base) {
// find the import
Name imported;
ModuleUtils::iterImportedGlobals(wasm, [&](Global* import) {
if (import->module == module && import->base == base) {
imported = import->name;
}
});
if (imported.isNull()) {
return nullptr;
}
// find a global inited to it
Global* ret = nullptr;
ModuleUtils::iterDefinedGlobals(wasm, [&](Global* defined) {
if (auto* init = defined->init->dynCast<GlobalGet>()) {
if (init->name == imported) {
ret = defined;
}
}
});
return ret;
}
inline bool canInitializeGlobal(Module& wasm, Expression* curr) {
if (auto* tuple = curr->dynCast<TupleMake>()) {
for (auto* op : tuple->operands) {
if (!Properties::isValidConstantExpression(wasm, op)) {
return false;
}
}
return true;
}
return Properties::isValidConstantExpression(wasm, curr);
}
} // namespace wasm::GlobalUtils
#endif // wasm_ir_global_h