Merge "Update prebuilt Clang to r353983." into p9.0HEADp9.0-backupp9.0

1 files changed, 73 insertions, 0 deletions

diff --git a/clang-r353983/include/llvm/Analysis/AliasAnalysisEvaluator.h b/clang-r353983/include/llvm/Analysis/AliasAnalysisEvaluator.h
new file mode 100644
index 00000000..972eceaa
--- /dev/null
+++ b/clang-r353983/include/llvm/Analysis/AliasAnalysisEvaluator.h
@@ -0,0 +1,73 @@
+//===- AliasAnalysisEvaluator.h - Alias Analysis Accuracy Evaluator -------===//
+//
+// 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 file implements a simple N^2 alias analysis accuracy evaluator. The
+/// analysis result is a set of statistics of how many times the AA
+/// infrastructure provides each kind of alias result and mod/ref result when
+/// queried with all pairs of pointers in the function.
+///
+/// It can be used to evaluate a change in an alias analysis implementation,
+/// algorithm, or the AA pipeline infrastructure itself. It acts like a stable
+/// and easily tested consumer of all AA information exposed.
+///
+/// This is inspired and adapted from code by: Naveen Neelakantam, Francesco
+/// Spadini, and Wojciech Stryjewski.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ANALYSIS_ALIASANALYSISEVALUATOR_H
+#define LLVM_ANALYSIS_ALIASANALYSISEVALUATOR_H
+
+#include "llvm/IR/Function.h"
+#include "llvm/IR/PassManager.h"
+
+namespace llvm {
+class AAResults;
+
+class AAEvaluator : public PassInfoMixin<AAEvaluator> {
+  int64_t FunctionCount;
+  int64_t NoAliasCount, MayAliasCount, PartialAliasCount, MustAliasCount;
+  int64_t NoModRefCount, ModCount, RefCount, ModRefCount;
+  int64_t MustCount, MustRefCount, MustModCount, MustModRefCount;
+
+public:
+  AAEvaluator()
+      : FunctionCount(), NoAliasCount(), MayAliasCount(), PartialAliasCount(),
+        MustAliasCount(), NoModRefCount(), ModCount(), RefCount(),
+        ModRefCount(), MustCount(), MustRefCount(), MustModCount(),
+        MustModRefCount() {}
+  AAEvaluator(AAEvaluator &&Arg)
+      : FunctionCount(Arg.FunctionCount), NoAliasCount(Arg.NoAliasCount),
+        MayAliasCount(Arg.MayAliasCount),
+        PartialAliasCount(Arg.PartialAliasCount),
+        MustAliasCount(Arg.MustAliasCount), NoModRefCount(Arg.NoModRefCount),
+        ModCount(Arg.ModCount), RefCount(Arg.RefCount),
+        ModRefCount(Arg.ModRefCount), MustCount(Arg.MustCount),
+        MustRefCount(Arg.MustRefCount), MustModCount(Arg.MustModCount),
+        MustModRefCount(Arg.MustModRefCount) {
+    Arg.FunctionCount = 0;
+  }
+  ~AAEvaluator();
+
+  /// Run the pass over the function.
+  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+
+private:
+  // Allow the legacy pass to run this using an internal API.
+  friend class AAEvalLegacyPass;
+
+  void runInternal(Function &F, AAResults &AA);
+};
+
+/// Create a wrapper of the above for the legacy pass manager.
+FunctionPass *createAAEvalPass();
+
+}
+
+#endif