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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_module_h
#define wasm_ir_module_h
#include "wasm.h"
#include "ir/manipulation.h"
namespace wasm {
namespace ModuleUtils {
// Computes the indexes in a wasm binary, i.e., with function imports
// and function implementations sharing a single index space, etc.,
// and with the imports first (the Module's functions and globals
// arrays are not assumed to be in a particular order, so we can't
// just use them directly).
struct BinaryIndexes {
std::unordered_map<Name, Index> functionIndexes;
std::unordered_map<Name, Index> globalIndexes;
BinaryIndexes(Module& wasm) {
auto addGlobal = [&](Global* curr) {
auto index = globalIndexes.size();
globalIndexes[curr->name] = index;
};
for (auto& curr : wasm.globals) {
if (curr->imported()) {
addGlobal(curr.get());
}
}
for (auto& curr : wasm.globals) {
if (!curr->imported()) {
addGlobal(curr.get());
}
}
assert(globalIndexes.size() == wasm.globals.size());
auto addFunction = [&](Function* curr) {
auto index = functionIndexes.size();
functionIndexes[curr->name] = index;
};
for (auto& curr : wasm.functions) {
if (curr->imported()) {
addFunction(curr.get());
}
}
for (auto& curr : wasm.functions) {
if (!curr->imported()) {
addFunction(curr.get());
}
}
assert(functionIndexes.size() == wasm.functions.size());
}
};
inline Function* copyFunction(Function* func, Module& out) {
auto* ret = new Function();
ret->name = func->name;
ret->result = func->result;
ret->params = func->params;
ret->vars = func->vars;
ret->type = Name(); // start with no named type; the names in the other module may differ
ret->localNames = func->localNames;
ret->localIndices = func->localIndices;
ret->debugLocations = func->debugLocations;
ret->body = ExpressionManipulator::copy(func->body, out);
ret->module = func->module;
ret->base = func->base;
// TODO: copy Stack IR
assert(!func->stackIR);
out.addFunction(ret);
return ret;
}
inline Global* copyGlobal(Global* global, Module& out) {
auto* ret = new Global();
ret->name = global->name;
ret->type = global->type;
ret->mutable_ = global->mutable_;
if (global->imported()) {
ret->init = nullptr;
} else {
ret->init = ExpressionManipulator::copy(global->init, out);
}
out.addGlobal(ret);
return ret;
}
inline void copyModule(Module& in, Module& out) {
// we use names throughout, not raw points, so simple copying is fine
// for everything *but* expressions
for (auto& curr : in.functionTypes) {
out.addFunctionType(new FunctionType(*curr));
}
for (auto& curr : in.exports) {
out.addExport(new Export(*curr));
}
for (auto& curr : in.functions) {
copyFunction(curr.get(), out);
}
for (auto& curr : in.globals) {
copyGlobal(curr.get(), out);
}
out.table = in.table;
for (auto& segment : out.table.segments) {
segment.offset = ExpressionManipulator::copy(segment.offset, out);
}
out.memory = in.memory;
for (auto& segment : out.memory.segments) {
segment.offset = ExpressionManipulator::copy(segment.offset, out);
}
out.start = in.start;
out.userSections = in.userSections;
out.debugInfoFileNames = in.debugInfoFileNames;
}
// Convenient iteration over imported/non-imported module elements
template<typename T>
inline void iterImportedMemories(Module& wasm, T visitor) {
if (wasm.memory.exists && wasm.memory.imported()) {
visitor(&wasm.memory);
}
}
template<typename T>
inline void iterDefinedMemories(Module& wasm, T visitor) {
if (wasm.memory.exists && !wasm.memory.imported()) {
visitor(&wasm.memory);
}
}
template<typename T>
inline void iterImportedTables(Module& wasm, T visitor) {
if (wasm.table.exists && wasm.table.imported()) {
visitor(&wasm.table);
}
}
template<typename T>
inline void iterDefinedTables(Module& wasm, T visitor) {
if (wasm.table.exists && !wasm.table.imported()) {
visitor(&wasm.table);
}
}
template<typename T>
inline void iterImportedGlobals(Module& wasm, T visitor) {
for (auto& import : wasm.globals) {
if (import->imported()) {
visitor(import.get());
}
}
}
template<typename T>
inline void iterDefinedGlobals(Module& wasm, T visitor) {
for (auto& import : wasm.globals) {
if (!import->imported()) {
visitor(import.get());
}
}
}
template<typename T>
inline void iterImportedFunctions(Module& wasm, T visitor) {
for (auto& import : wasm.functions) {
if (import->imported()) {
visitor(import.get());
}
}
}
template<typename T>
inline void iterDefinedFunctions(Module& wasm, T visitor) {
for (auto& import : wasm.functions) {
if (!import->imported()) {
visitor(import.get());
}
}
}
} // namespace ModuleUtils
} // namespace wasm
#endif // wasm_ir_module_h
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