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96 lines
3.6 KiB
C++
96 lines
3.6 KiB
C++
//===- PassManager.cpp - Infrastructure for managing & running IR passes --===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IR/PassManager.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/IR/LLVMContext.h"
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using namespace llvm;
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// Explicit template instantiations and specialization defininitions for core
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// template typedefs.
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namespace llvm {
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template class AllAnalysesOn<Module>;
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template class AllAnalysesOn<Function>;
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template class PassManager<Module>;
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template class PassManager<Function>;
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template class AnalysisManager<Module>;
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template class AnalysisManager<Function>;
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template class InnerAnalysisManagerProxy<FunctionAnalysisManager, Module>;
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template class OuterAnalysisManagerProxy<ModuleAnalysisManager, Function>;
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template <>
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bool FunctionAnalysisManagerModuleProxy::Result::invalidate(
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Module &M, const PreservedAnalyses &PA,
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ModuleAnalysisManager::Invalidator &Inv) {
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// If literally everything is preserved, we're done.
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if (PA.areAllPreserved())
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return false; // This is still a valid proxy.
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// If this proxy isn't marked as preserved, then even if the result remains
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// valid, the key itself may no longer be valid, so we clear everything.
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//
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// Note that in order to preserve this proxy, a module pass must ensure that
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// the FAM has been completely updated to handle the deletion of functions.
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// Specifically, any FAM-cached results for those functions need to have been
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// forcibly cleared. When preserved, this proxy will only invalidate results
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// cached on functions *still in the module* at the end of the module pass.
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auto PAC = PA.getChecker<FunctionAnalysisManagerModuleProxy>();
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if (!PAC.preserved() && !PAC.preservedSet<AllAnalysesOn<Module>>()) {
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InnerAM->clear();
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return true;
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}
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// Directly check if the relevant set is preserved.
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bool AreFunctionAnalysesPreserved =
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PA.allAnalysesInSetPreserved<AllAnalysesOn<Function>>();
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// Now walk all the functions to see if any inner analysis invalidation is
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// necessary.
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for (Function &F : M) {
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Optional<PreservedAnalyses> FunctionPA;
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// Check to see whether the preserved set needs to be pruned based on
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// module-level analysis invalidation that triggers deferred invalidation
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// registered with the outer analysis manager proxy for this function.
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if (auto *OuterProxy =
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InnerAM->getCachedResult<ModuleAnalysisManagerFunctionProxy>(F))
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for (const auto &OuterInvalidationPair :
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OuterProxy->getOuterInvalidations()) {
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AnalysisKey *OuterAnalysisID = OuterInvalidationPair.first;
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const auto &InnerAnalysisIDs = OuterInvalidationPair.second;
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if (Inv.invalidate(OuterAnalysisID, M, PA)) {
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if (!FunctionPA)
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FunctionPA = PA;
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for (AnalysisKey *InnerAnalysisID : InnerAnalysisIDs)
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FunctionPA->abandon(InnerAnalysisID);
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}
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}
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// Check if we needed a custom PA set, and if so we'll need to run the
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// inner invalidation.
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if (FunctionPA) {
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InnerAM->invalidate(F, *FunctionPA);
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continue;
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}
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// Otherwise we only need to do invalidation if the original PA set didn't
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// preserve all function analyses.
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if (!AreFunctionAnalysesPreserved)
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InnerAM->invalidate(F, PA);
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}
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// Return false to indicate that this result is still a valid proxy.
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return false;
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}
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}
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AnalysisSetKey CFGAnalyses::SetKey;
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AnalysisSetKey PreservedAnalyses::AllAnalysesKey;
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