Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/Analysis/IndirectCallPromotionAnalysis.h b/linux-x64/clang/include/llvm/Analysis/IndirectCallPromotionAnalysis.h
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index 0000000..8b1c101
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+++ b/linux-x64/clang/include/llvm/Analysis/IndirectCallPromotionAnalysis.h
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+//===- IndirectCallPromotionAnalysis.h - Indirect call analysis -*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+/// \file
+/// Interface to identify indirect call promotion candidates.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ANALYSIS_INDIRECTCALLPROMOTIONANALYSIS_H
+#define LLVM_ANALYSIS_INDIRECTCALLPROMOTIONANALYSIS_H
+
+#include "llvm/ProfileData/InstrProf.h"
+
+namespace llvm {
+
+class Instruction;
+
+// Class for identifying profitable indirect call promotion candidates when
+// the indirect-call value profile metadata is available.
+class ICallPromotionAnalysis {
+private:
+ // Allocate space to read the profile annotation.
+ std::unique_ptr<InstrProfValueData[]> ValueDataArray;
+
+ // Count is the call count for the direct-call target.
+ // TotalCount is the total call count for the indirect-call callsite.
+ // RemainingCount is the TotalCount minus promoted-direct-call count.
+ // Return true we should promote this indirect-call target.
+ bool isPromotionProfitable(uint64_t Count, uint64_t TotalCount,
+ uint64_t RemainingCount);
+
+ // Returns the number of profitable candidates to promote for the
+ // current ValueDataArray and the given \p Inst.
+ uint32_t getProfitablePromotionCandidates(const Instruction *Inst,
+ uint32_t NumVals,
+ uint64_t TotalCount);
+
+ // Noncopyable
+ ICallPromotionAnalysis(const ICallPromotionAnalysis &other) = delete;
+ ICallPromotionAnalysis &
+ operator=(const ICallPromotionAnalysis &other) = delete;
+
+public:
+ ICallPromotionAnalysis();
+
+ /// \brief Returns reference to array of InstrProfValueData for the given
+ /// instruction \p I.
+ ///
+ /// The \p NumVals, \p TotalCount and \p NumCandidates
+ /// are set to the number of values in the array, the total profile count
+ /// of the indirect call \p I, and the number of profitable candidates
+ /// in the given array (which is sorted in reverse order of profitability).
+ ///
+ /// The returned array space is owned by this class, and overwritten on
+ /// subsequent calls.
+ ArrayRef<InstrProfValueData>
+ getPromotionCandidatesForInstruction(const Instruction *I, uint32_t &NumVals,
+ uint64_t &TotalCount,
+ uint32_t &NumCandidates);
+};
+
+} // end namespace llvm
+
+#endif