src/ir/intrinsics.cpp

/*
 * Copyright 2021 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.
 */

#include "ir/intrinsics.h"
#include "wasm-builder.h"

namespace wasm {

static Name BinaryenIntrinsicsModule("binaryen-intrinsics"),
  CallWithoutEffects("call.without.effects");

bool Intrinsics::isCallWithoutEffects(Function* func) {
  if (func->module != BinaryenIntrinsicsModule) {
    return false;
  }
  if (func->base == CallWithoutEffects) {
    return true;
  }
  Fatal() << "Unrecognized intrinsic";
}

Call* Intrinsics::isCallWithoutEffects(Expression* curr) {
  if (auto* call = curr->dynCast<Call>()) {
    // The target function may not exist if the module is still being
    // constructed.
    if (auto* func = module.getFunctionOrNull(call->target)) {
      if (isCallWithoutEffects(func)) {
        return call;
      }
    }
  }
  return nullptr;
}

} // namespace wasm