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/*
* Copyright 2016 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_localizer_h
#define wasm_ir_localizer_h
#include <wasm-builder.h>
namespace wasm {
// Make an expression available in a local. If already in one, just
// use that local, otherwise use a new local
struct Localizer {
Index index;
Expression* expr;
Localizer(Expression* input, Function* func, Module* wasm) {
expr = input;
if (auto* get = expr->dynCast<LocalGet>()) {
index = get->index;
} else if (auto* set = expr->dynCast<LocalSet>()) {
index = set->index;
} else {
index = Builder::addVar(func, expr->type);
expr = Builder(*wasm).makeLocalTee(index, expr, expr->type);
}
}
};
} // namespace wasm
#endif // wasm_ir_localizer_h