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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.
struct BinaryIndexes {
std::unordered_map<Name, Index> functionIndexes;
std::unordered_map<Name, Index> globalIndexes;
BinaryIndexes(Module& wasm) {
for (Index i = 0; i < wasm.imports.size(); i++) {
auto& import = wasm.imports[i];
if (import->kind == ExternalKind::Function) {
auto index = functionIndexes.size();
functionIndexes[import->name] = index;
} else if (import->kind == ExternalKind::Global) {
auto index = globalIndexes.size();
globalIndexes[import->name] = index;
}
}
for (Index i = 0; i < wasm.functions.size(); i++) {
auto index = functionIndexes.size();
functionIndexes[wasm.functions[i]->name] = index;
}
for (Index i = 0; i < wasm.globals.size(); i++) {
auto index = globalIndexes.size();
globalIndexes[wasm.globals[i]->name] = index;
}
}
};
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);
// TODO: copy Stack IR
assert(!func->stackIR);
out.addFunction(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.imports) {
out.addImport(new Import(*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) {
out.addGlobal(new Global(*curr));
}
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;
}
} // namespace ModuleUtils
} // namespace wasm
#endif // wasm_ir_module_h
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