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

1 files changed, 124 insertions, 0 deletions

diff --git a/clang-r353983/include/llvm/Transforms/Instrumentation/InstrProfiling.h b/clang-r353983/include/llvm/Transforms/Instrumentation/InstrProfiling.h
new file mode 100644
index 00000000..4fad6506
--- /dev/null
+++ b/clang-r353983/include/llvm/Transforms/Instrumentation/InstrProfiling.h
@@ -0,0 +1,124 @@
+//===- Transforms/Instrumentation/InstrProfiling.h --------------*- 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 file provides the interface for LLVM's PGO Instrumentation lowering
+/// pass.
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TRANSFORMS_INSTRPROFILING_H
+#define LLVM_TRANSFORMS_INSTRPROFILING_H
+
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/IR/IntrinsicInst.h"
+#include "llvm/IR/PassManager.h"
+#include "llvm/ProfileData/InstrProf.h"
+#include "llvm/Transforms/Instrumentation.h"
+#include <cstddef>
+#include <cstdint>
+#include <cstring>
+#include <vector>
+
+namespace llvm {
+
+class TargetLibraryInfo;
+using LoadStorePair = std::pair<Instruction *, Instruction *>;
+
+/// Instrumentation based profiling lowering pass. This pass lowers
+/// the profile instrumented code generated by FE or the IR based
+/// instrumentation pass.
+class InstrProfiling : public PassInfoMixin<InstrProfiling> {
+public:
+  InstrProfiling() = default;
+  InstrProfiling(const InstrProfOptions &Options) : Options(Options) {}
+
+  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  bool run(Module &M, const TargetLibraryInfo &TLI);
+
+private:
+  InstrProfOptions Options;
+  Module *M;
+  Triple TT;
+  const TargetLibraryInfo *TLI;
+  struct PerFunctionProfileData {
+    uint32_t NumValueSites[IPVK_Last + 1];
+    GlobalVariable *RegionCounters = nullptr;
+    GlobalVariable *DataVar = nullptr;
+
+    PerFunctionProfileData() {
+      memset(NumValueSites, 0, sizeof(uint32_t) * (IPVK_Last + 1));
+    }
+  };
+  DenseMap<GlobalVariable *, PerFunctionProfileData> ProfileDataMap;
+  std::vector<GlobalValue *> UsedVars;
+  std::vector<GlobalVariable *> ReferencedNames;
+  GlobalVariable *NamesVar;
+  size_t NamesSize;
+
+  // vector of counter load/store pairs to be register promoted.
+  std::vector<LoadStorePair> PromotionCandidates;
+
+  // The start value of precise value profile range for memory intrinsic sizes.
+  int64_t MemOPSizeRangeStart;
+  // The end value of precise value profile range for memory intrinsic sizes.
+  int64_t MemOPSizeRangeLast;
+
+  int64_t TotalCountersPromoted = 0;
+
+  /// Lower instrumentation intrinsics in the function. Returns true if there
+  /// any lowering.
+  bool lowerIntrinsics(Function *F);
+
+  /// Register-promote counter loads and stores in loops.
+  void promoteCounterLoadStores(Function *F);
+
+  /// Returns true if profile counter update register promotion is enabled.
+  bool isCounterPromotionEnabled() const;
+
+  /// Count the number of instrumented value sites for the function.
+  void computeNumValueSiteCounts(InstrProfValueProfileInst *Ins);
+
+  /// Replace instrprof_value_profile with a call to runtime library.
+  void lowerValueProfileInst(InstrProfValueProfileInst *Ins);
+
+  /// Replace instrprof_increment with an increment of the appropriate value.
+  void lowerIncrement(InstrProfIncrementInst *Inc);
+
+  /// Force emitting of name vars for unused functions.
+  void lowerCoverageData(GlobalVariable *CoverageNamesVar);
+
+  /// Get the region counters for an increment, creating them if necessary.
+  ///
+  /// If the counter array doesn't yet exist, the profile data variables
+  /// referring to them will also be created.
+  GlobalVariable *getOrCreateRegionCounters(InstrProfIncrementInst *Inc);
+
+  /// Emit the section with compressed function names.
+  void emitNameData();
+
+  /// Emit value nodes section for value profiling.
+  void emitVNodes();
+
+  /// Emit runtime registration functions for each profile data variable.
+  void emitRegistration();
+
+  /// Emit the necessary plumbing to pull in the runtime initialization.
+  /// Returns true if a change was made.
+  bool emitRuntimeHook();
+
+  /// Add uses of our data variables and runtime hook.
+  void emitUses();
+
+  /// Create a static initializer for our data, on platforms that need it,
+  /// and for any profile output file that was specified.
+  void emitInitialization();
+};
+
+} // end namespace llvm
+
+#endif // LLVM_TRANSFORMS_INSTRPROFILING_H