intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 101 insertions, 0 deletions

diff --git a/contrib/libs/llvm12/include/llvm/Analysis/ScopedNoAliasAA.h b/contrib/libs/llvm12/include/llvm/Analysis/ScopedNoAliasAA.h
new file mode 100644
index 0000000000..278b00143f
--- /dev/null
+++ b/contrib/libs/llvm12/include/llvm/Analysis/ScopedNoAliasAA.h
@@ -0,0 +1,101 @@
+#pragma once
+
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
+
+//===- ScopedNoAliasAA.h - Scoped No-Alias Alias Analysis -------*- 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
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file
+/// This is the interface for a metadata-based scoped no-alias analysis.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ANALYSIS_SCOPEDNOALIASAA_H
+#define LLVM_ANALYSIS_SCOPEDNOALIASAA_H
+
+#include "llvm/Analysis/AliasAnalysis.h"
+#include "llvm/IR/PassManager.h"
+#include "llvm/Pass.h"
+#include <memory>
+
+namespace llvm {
+
+class Function;
+class MDNode;
+class MemoryLocation;
+
+/// A simple AA result which uses scoped-noalias metadata to answer queries.
+class ScopedNoAliasAAResult : public AAResultBase<ScopedNoAliasAAResult> {
+  friend AAResultBase<ScopedNoAliasAAResult>;
+
+public:
+  /// Handle invalidation events from the new pass manager.
+  ///
+  /// By definition, this result is stateless and so remains valid.
+  bool invalidate(Function &, const PreservedAnalyses &,
+                  FunctionAnalysisManager::Invalidator &) {
+    return false;
+  }
+
+  AliasResult alias(const MemoryLocation &LocA, const MemoryLocation &LocB,
+                    AAQueryInfo &AAQI);
+  ModRefInfo getModRefInfo(const CallBase *Call, const MemoryLocation &Loc,
+                           AAQueryInfo &AAQI);
+  ModRefInfo getModRefInfo(const CallBase *Call1, const CallBase *Call2,
+                           AAQueryInfo &AAQI);
+
+private:
+  bool mayAliasInScopes(const MDNode *Scopes, const MDNode *NoAlias) const;
+};
+
+/// Analysis pass providing a never-invalidated alias analysis result.
+class ScopedNoAliasAA : public AnalysisInfoMixin<ScopedNoAliasAA> {
+  friend AnalysisInfoMixin<ScopedNoAliasAA>;
+
+  static AnalysisKey Key;
+
+public:
+  using Result = ScopedNoAliasAAResult;
+
+  ScopedNoAliasAAResult run(Function &F, FunctionAnalysisManager &AM);
+};
+
+/// Legacy wrapper pass to provide the ScopedNoAliasAAResult object.
+class ScopedNoAliasAAWrapperPass : public ImmutablePass {
+  std::unique_ptr<ScopedNoAliasAAResult> Result;
+
+public:
+  static char ID;
+
+  ScopedNoAliasAAWrapperPass();
+
+  ScopedNoAliasAAResult &getResult() { return *Result; }
+  const ScopedNoAliasAAResult &getResult() const { return *Result; }
+
+  bool doInitialization(Module &M) override;
+  bool doFinalization(Module &M) override;
+  void getAnalysisUsage(AnalysisUsage &AU) const override;
+};
+
+//===--------------------------------------------------------------------===//
+//
+// createScopedNoAliasAAWrapperPass - This pass implements metadata-based
+// scoped noalias analysis.
+//
+ImmutablePass *createScopedNoAliasAAWrapperPass();
+
+} // end namespace llvm
+
+#endif // LLVM_ANALYSIS_SCOPEDNOALIASAA_H
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif