Example #1
0
PreservedAnalyses
PassManager<LazyCallGraph::SCC, CGSCCAnalysisManager, LazyCallGraph &,
            CGSCCUpdateResult &>::run(LazyCallGraph::SCC &InitialC,
                                      CGSCCAnalysisManager &AM,
                                      LazyCallGraph &G, CGSCCUpdateResult &UR) {
  PreservedAnalyses PA = PreservedAnalyses::all();

  if (DebugLogging)
    dbgs() << "Starting CGSCC pass manager run.\n";

  // The SCC may be refined while we are running passes over it, so set up
  // a pointer that we can update.
  LazyCallGraph::SCC *C = &InitialC;

  for (auto &Pass : Passes) {
    if (DebugLogging)
      dbgs() << "Running pass: "******" on " << *C << "\n";

    PreservedAnalyses PassPA = Pass->run(*C, AM, G, UR);

    // Update the SCC if necessary.
    C = UR.UpdatedC ? UR.UpdatedC : C;

    // Check that we didn't miss any update scenario.
    assert(!UR.InvalidatedSCCs.count(C) && "Processing an invalid SCC!");
    assert(C->begin() != C->end() && "Cannot have an empty SCC!");

    // Update the analysis manager as each pass runs and potentially
    // invalidates analyses.
    AM.invalidate(*C, PassPA);

    // Finally, we intersect the final preserved analyses to compute the
    // aggregate preserved set for this pass manager.
    PA.intersect(std::move(PassPA));

    // FIXME: Historically, the pass managers all called the LLVM context's
    // yield function here. We don't have a generic way to acquire the
    // context and it isn't yet clear what the right pattern is for yielding
    // in the new pass manager so it is currently omitted.
    // ...getContext().yield();
  }

  // Invaliadtion was handled after each pass in the above loop for the current
  // SCC. Therefore, the remaining analysis results in the AnalysisManager are
  // preserved. We mark this with a set so that we don't need to inspect each
  // one individually.
  PA.preserve<AllAnalysesOn<LazyCallGraph::SCC>>();

  if (DebugLogging)
    dbgs() << "Finished CGSCC pass manager run.\n";

  return PA;
}
Example #2
0
PreservedAnalyses
PassManager<LazyCallGraph::SCC, CGSCCAnalysisManager, LazyCallGraph &,
            CGSCCUpdateResult &>::run(LazyCallGraph::SCC &InitialC,
                                      CGSCCAnalysisManager &AM,
                                      LazyCallGraph &G, CGSCCUpdateResult &UR) {
  // Request PassInstrumentation from analysis manager, will use it to run
  // instrumenting callbacks for the passes later.
  PassInstrumentation PI =
      AM.getResult<PassInstrumentationAnalysis>(InitialC, G);

  PreservedAnalyses PA = PreservedAnalyses::all();

  if (DebugLogging)
    dbgs() << "Starting CGSCC pass manager run.\n";

  // The SCC may be refined while we are running passes over it, so set up
  // a pointer that we can update.
  LazyCallGraph::SCC *C = &InitialC;

  for (auto &Pass : Passes) {
    if (DebugLogging)
      dbgs() << "Running pass: "******" on " << *C << "\n";

    // Check the PassInstrumentation's BeforePass callbacks before running the
    // pass, skip its execution completely if asked to (callback returns false).
    if (!PI.runBeforePass(*Pass, *C))
      continue;

    PreservedAnalyses PassPA = Pass->run(*C, AM, G, UR);

    if (UR.InvalidatedSCCs.count(C))
      PI.runAfterPassInvalidated<LazyCallGraph::SCC>(*Pass);
    else
      PI.runAfterPass<LazyCallGraph::SCC>(*Pass, *C);

    // Update the SCC if necessary.
    C = UR.UpdatedC ? UR.UpdatedC : C;

    // If the CGSCC pass wasn't able to provide a valid updated SCC, the
    // current SCC may simply need to be skipped if invalid.
    if (UR.InvalidatedSCCs.count(C)) {
      LLVM_DEBUG(dbgs() << "Skipping invalidated root or island SCC!\n");
      break;
    }
    // Check that we didn't miss any update scenario.
    assert(C->begin() != C->end() && "Cannot have an empty SCC!");

    // Update the analysis manager as each pass runs and potentially
    // invalidates analyses.
    AM.invalidate(*C, PassPA);

    // Finally, we intersect the final preserved analyses to compute the
    // aggregate preserved set for this pass manager.
    PA.intersect(std::move(PassPA));

    // FIXME: Historically, the pass managers all called the LLVM context's
    // yield function here. We don't have a generic way to acquire the
    // context and it isn't yet clear what the right pattern is for yielding
    // in the new pass manager so it is currently omitted.
    // ...getContext().yield();
  }

  // Invalidation was handled after each pass in the above loop for the current
  // SCC. Therefore, the remaining analysis results in the AnalysisManager are
  // preserved. We mark this with a set so that we don't need to inspect each
  // one individually.
  PA.preserveSet<AllAnalysesOn<LazyCallGraph::SCC>>();

  if (DebugLogging)
    dbgs() << "Finished CGSCC pass manager run.\n";

  return PA;
}