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/*
* 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/module-utils.h"
#include "literal.h"
#include "wasm.h"
namespace wasm {
namespace 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;
}
} // namespace GlobalUtils
} // namespace wasm
#endif // wasm_ir_global_h
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