Update prebuilt Clang to r353983e.HEADq10.0

clang 9.0.5 (based on r353983e) from build 5696680.

Bug: http://b/135931688
Bug: http://b/136008926
Test: N/A
Change-Id: I922d17410047d2e2df4625615352c588ee71b203

1 files changed, 273 insertions, 0 deletions

diff --git a/clang-r353983e/include/llvm/PassAnalysisSupport.h b/clang-r353983e/include/llvm/PassAnalysisSupport.h
new file mode 100644
index 00000000..1228534d
--- /dev/null
+++ b/clang-r353983e/include/llvm/PassAnalysisSupport.h
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+//===- llvm/PassAnalysisSupport.h - Analysis Pass Support code --*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines stuff that is used to define and "use" Analysis Passes.
+// This file is automatically #included by Pass.h, so:
+//
+//           NO .CPP FILES SHOULD INCLUDE THIS FILE DIRECTLY
+//
+// Instead, #include Pass.h
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_PASSANALYSISSUPPORT_H
+#define LLVM_PASSANALYSISSUPPORT_H
+
+#include "Pass.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
+#include <cassert>
+#include <utility>
+#include <vector>
+
+namespace llvm {
+
+class Function;
+class Pass;
+class PMDataManager;
+
+//===----------------------------------------------------------------------===//
+/// Represent the analysis usage information of a pass.  This tracks analyses
+/// that the pass REQUIRES (must be available when the pass runs), REQUIRES
+/// TRANSITIVE (must be available throughout the lifetime of the pass), and
+/// analyses that the pass PRESERVES (the pass does not invalidate the results
+/// of these analyses).  This information is provided by a pass to the Pass
+/// infrastructure through the getAnalysisUsage virtual function.
+///
+class AnalysisUsage {
+public:
+  using VectorType = SmallVectorImpl<AnalysisID>;
+
+private:
+  /// Sets of analyses required and preserved by a pass
+  // TODO: It's not clear that SmallVector is an appropriate data structure for
+  // this usecase.  The sizes were picked to minimize wasted space, but are
+  // otherwise fairly meaningless.
+  SmallVector<AnalysisID, 8> Required;
+  SmallVector<AnalysisID, 2> RequiredTransitive;
+  SmallVector<AnalysisID, 2> Preserved;
+  SmallVector<AnalysisID, 0> Used;
+  bool PreservesAll = false;
+
+public:
+  AnalysisUsage() = default;
+
+  ///@{
+  /// Add the specified ID to the required set of the usage info for a pass.
+  AnalysisUsage &addRequiredID(const void *ID);
+  AnalysisUsage &addRequiredID(char &ID);
+  template<class PassClass>
+  AnalysisUsage &addRequired() {
+    return addRequiredID(PassClass::ID);
+  }
+
+  AnalysisUsage &addRequiredTransitiveID(char &ID);
+  template<class PassClass>
+  AnalysisUsage &addRequiredTransitive() {
+    return addRequiredTransitiveID(PassClass::ID);
+  }
+  ///@}
+
+  ///@{
+  /// Add the specified ID to the set of analyses preserved by this pass.
+  AnalysisUsage &addPreservedID(const void *ID) {
+    Preserved.push_back(ID);
+    return *this;
+  }
+  AnalysisUsage &addPreservedID(char &ID) {
+    Preserved.push_back(&ID);
+    return *this;
+  }
+  /// Add the specified Pass class to the set of analyses preserved by this pass.
+  template<class PassClass>
+  AnalysisUsage &addPreserved() {
+    Preserved.push_back(&PassClass::ID);
+    return *this;
+  }
+  ///@}
+
+  ///@{
+  /// Add the specified ID to the set of analyses used by this pass if they are
+  /// available..
+  AnalysisUsage &addUsedIfAvailableID(const void *ID) {
+    Used.push_back(ID);
+    return *this;
+  }
+  AnalysisUsage &addUsedIfAvailableID(char &ID) {
+    Used.push_back(&ID);
+    return *this;
+  }
+  /// Add the specified Pass class to the set of analyses used by this pass.
+  template<class PassClass>
+  AnalysisUsage &addUsedIfAvailable() {
+    Used.push_back(&PassClass::ID);
+    return *this;
+  }
+  ///@}
+
+  /// Add the Pass with the specified argument string to the set of analyses
+  /// preserved by this pass. If no such Pass exists, do nothing. This can be
+  /// useful when a pass is trivially preserved, but may not be linked in. Be
+  /// careful about spelling!
+  AnalysisUsage &addPreserved(StringRef Arg);
+
+  /// Set by analyses that do not transform their input at all
+  void setPreservesAll() { PreservesAll = true; }
+
+  /// Determine whether a pass said it does not transform its input at all
+  bool getPreservesAll() const { return PreservesAll; }
+
+  /// This function should be called by the pass, iff they do not:
+  ///
+  ///  1. Add or remove basic blocks from the function
+  ///  2. Modify terminator instructions in any way.
+  ///
+  /// This function annotates the AnalysisUsage info object to say that analyses
+  /// that only depend on the CFG are preserved by this pass.
+  void setPreservesCFG();
+
+  const VectorType &getRequiredSet() const { return Required; }
+  const VectorType &getRequiredTransitiveSet() const {
+    return RequiredTransitive;
+  }
+  const VectorType &getPreservedSet() const { return Preserved; }
+  const VectorType &getUsedSet() const { return Used; }
+};
+
+//===----------------------------------------------------------------------===//
+/// AnalysisResolver - Simple interface used by Pass objects to pull all
+/// analysis information out of pass manager that is responsible to manage
+/// the pass.
+///
+class AnalysisResolver {
+public:
+  AnalysisResolver() = delete;
+  explicit AnalysisResolver(PMDataManager &P) : PM(P) {}
+
+  PMDataManager &getPMDataManager() { return PM; }
+
+  /// Find pass that is implementing PI.
+  Pass *findImplPass(AnalysisID PI) {
+    Pass *ResultPass = nullptr;
+    for (const auto &AnalysisImpl : AnalysisImpls) {
+      if (AnalysisImpl.first == PI) {
+        ResultPass = AnalysisImpl.second;
+        break;
+      }
+    }
+    return ResultPass;
+  }
+
+  /// Find pass that is implementing PI. Initialize pass for Function F.
+  Pass *findImplPass(Pass *P, AnalysisID PI, Function &F);
+
+  void addAnalysisImplsPair(AnalysisID PI, Pass *P) {
+    if (findImplPass(PI) == P)
+      return;
+    std::pair<AnalysisID, Pass*> pir = std::make_pair(PI,P);
+    AnalysisImpls.push_back(pir);
+  }
+
+  /// Clear cache that is used to connect a pass to the analysis (PassInfo).
+  void clearAnalysisImpls() {
+    AnalysisImpls.clear();
+  }
+
+  /// Return analysis result or null if it doesn't exist.
+  Pass *getAnalysisIfAvailable(AnalysisID ID, bool Direction) const;
+
+private:
+  /// This keeps track of which passes implements the interfaces that are
+  /// required by the current pass (to implement getAnalysis()).
+  std::vector<std::pair<AnalysisID, Pass *>> AnalysisImpls;
+
+  /// PassManager that is used to resolve analysis info
+  PMDataManager &PM;
+};
+
+/// getAnalysisIfAvailable<AnalysisType>() - Subclasses use this function to
+/// get analysis information that might be around, for example to update it.
+/// This is different than getAnalysis in that it can fail (if the analysis
+/// results haven't been computed), so should only be used if you can handle
+/// the case when the analysis is not available.  This method is often used by
+/// transformation APIs to update analysis results for a pass automatically as
+/// the transform is performed.
+template<typename AnalysisType>
+AnalysisType *Pass::getAnalysisIfAvailable() const {
+  assert(Resolver && "Pass not resident in a PassManager object!");
+
+  const void *PI = &AnalysisType::ID;
+
+  Pass *ResultPass = Resolver->getAnalysisIfAvailable(PI, true);
+  if (!ResultPass) return nullptr;
+
+  // Because the AnalysisType may not be a subclass of pass (for
+  // AnalysisGroups), we use getAdjustedAnalysisPointer here to potentially
+  // adjust the return pointer (because the class may multiply inherit, once
+  // from pass, once from AnalysisType).
+  return (AnalysisType*)ResultPass->getAdjustedAnalysisPointer(PI);
+}
+
+/// getAnalysis<AnalysisType>() - This function is used by subclasses to get
+/// to the analysis information that they claim to use by overriding the
+/// getAnalysisUsage function.
+template<typename AnalysisType>
+AnalysisType &Pass::getAnalysis() const {
+  assert(Resolver && "Pass has not been inserted into a PassManager object!");
+  return getAnalysisID<AnalysisType>(&AnalysisType::ID);
+}
+
+template<typename AnalysisType>
+AnalysisType &Pass::getAnalysisID(AnalysisID PI) const {
+  assert(PI && "getAnalysis for unregistered pass!");
+  assert(Resolver&&"Pass has not been inserted into a PassManager object!");
+  // PI *must* appear in AnalysisImpls.  Because the number of passes used
+  // should be a small number, we just do a linear search over a (dense)
+  // vector.
+  Pass *ResultPass = Resolver->findImplPass(PI);
+  assert(ResultPass &&
+         "getAnalysis*() called on an analysis that was not "
+         "'required' by pass!");
+
+  // Because the AnalysisType may not be a subclass of pass (for
+  // AnalysisGroups), we use getAdjustedAnalysisPointer here to potentially
+  // adjust the return pointer (because the class may multiply inherit, once
+  // from pass, once from AnalysisType).
+  return *(AnalysisType*)ResultPass->getAdjustedAnalysisPointer(PI);
+}
+
+/// getAnalysis<AnalysisType>() - This function is used by subclasses to get
+/// to the analysis information that they claim to use by overriding the
+/// getAnalysisUsage function.
+template<typename AnalysisType>
+AnalysisType &Pass::getAnalysis(Function &F) {
+  assert(Resolver &&"Pass has not been inserted into a PassManager object!");
+
+  return getAnalysisID<AnalysisType>(&AnalysisType::ID, F);
+}
+
+template<typename AnalysisType>
+AnalysisType &Pass::getAnalysisID(AnalysisID PI, Function &F) {
+  assert(PI && "getAnalysis for unregistered pass!");
+  assert(Resolver && "Pass has not been inserted into a PassManager object!");
+  // PI *must* appear in AnalysisImpls.  Because the number of passes used
+  // should be a small number, we just do a linear search over a (dense)
+  // vector.
+  Pass *ResultPass = Resolver->findImplPass(this, PI, F);
+  assert(ResultPass && "Unable to find requested analysis info");
+
+  // Because the AnalysisType may not be a subclass of pass (for
+  // AnalysisGroups), we use getAdjustedAnalysisPointer here to potentially
+  // adjust the return pointer (because the class may multiply inherit, once
+  // from pass, once from AnalysisType).
+  return *(AnalysisType*)ResultPass->getAdjustedAnalysisPointer(PI);
+}
+
+} // end namespace llvm
+
+#endif // LLVM_PASSANALYSISSUPPORT_H