src/main/java/com/android/tools/r8/horizontalclassmerging/IRCodeProvider.java

// Copyright (c) 2021, the R8 project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

package com.android.tools.r8.horizontalclassmerging;

import com.android.tools.r8.graph.AppInfo;
import com.android.tools.r8.graph.AppInfoWithClassHierarchy;
import com.android.tools.r8.graph.AppView;
import com.android.tools.r8.graph.ProgramMethod;
import com.android.tools.r8.ir.code.IRCode;

public class IRCodeProvider {

  private final AppView<AppInfo> appViewForConversion;

  public IRCodeProvider(AppView<? extends AppInfoWithClassHierarchy> appView) {
    // At this point the code rewritings described by repackaging and synthetic finalization have
    // not been applied to the code objects. These code rewritings will be applied in the
    // application writer. We therefore simulate that we are in D8, to allow building IR for each of
    // the class initializers without applying the unapplied code rewritings, to avoid that we apply
    // the lens more than once to the same piece of code.
    AppView<AppInfo> appViewForConversion =
        AppView.createForD8(AppInfo.createInitialAppInfo(appView.appInfo().app()));
    appViewForConversion.setGraphLens(appView.graphLens());
    this.appViewForConversion = appViewForConversion;
  }

  public IRCode buildIR(ProgramMethod method) {
    return method
        .getDefinition()
        .getCode()
        .buildIR(method, appViewForConversion, method.getOrigin());
  }
}