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8907a0855e
Under certain (currently unknown) conditions, llvm-profdata is outputting profiles that have two consecutive entries in the MemOPSize section for the value 0. This causes the PGOMemOPSizeOpt pass to output an invalid switch instruction with two cases for 0. As mentioned, we’re not quite sure what’s causing this to happen, but this patch prevents llvm-profdata from outputting a profile that has this problem and gives an error with a request for a reproducible. Differential Revision: https://reviews.llvm.org/D92074
126 lines
4.5 KiB
C++
126 lines
4.5 KiB
C++
//===- InstrProfWriter.h - Instrumented profiling writer --------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains support for writing profiling data for instrumentation
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// based PGO and coverage.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_PROFILEDATA_INSTRPROFWRITER_H
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#define LLVM_PROFILEDATA_INSTRPROFWRITER_H
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ProfileData/InstrProf.h"
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#include "llvm/Support/Endian.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include <cstdint>
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#include <memory>
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namespace llvm {
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/// Writer for instrumentation based profile data.
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class InstrProfRecordWriterTrait;
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class ProfOStream;
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class raw_fd_ostream;
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class InstrProfWriter {
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public:
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using ProfilingData = SmallDenseMap<uint64_t, InstrProfRecord>;
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// PF_IRLevelWithCS is the profile from context sensitive IR instrumentation.
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enum ProfKind { PF_Unknown = 0, PF_FE, PF_IRLevel, PF_IRLevelWithCS };
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private:
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bool Sparse;
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StringMap<ProfilingData> FunctionData;
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ProfKind ProfileKind = PF_Unknown;
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bool InstrEntryBBEnabled;
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// Use raw pointer here for the incomplete type object.
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InstrProfRecordWriterTrait *InfoObj;
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public:
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InstrProfWriter(bool Sparse = false, bool InstrEntryBBEnabled = false);
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~InstrProfWriter();
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StringMap<ProfilingData> &getProfileData() { return FunctionData; }
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/// Add function counts for the given function. If there are already counts
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/// for this function and the hash and number of counts match, each counter is
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/// summed. Optionally scale counts by \p Weight.
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void addRecord(NamedInstrProfRecord &&I, uint64_t Weight,
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function_ref<void(Error)> Warn);
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void addRecord(NamedInstrProfRecord &&I, function_ref<void(Error)> Warn) {
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addRecord(std::move(I), 1, Warn);
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}
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/// Merge existing function counts from the given writer.
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void mergeRecordsFromWriter(InstrProfWriter &&IPW,
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function_ref<void(Error)> Warn);
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/// Write the profile to \c OS
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Error write(raw_fd_ostream &OS);
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/// Write the profile in text format to \c OS
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Error writeText(raw_fd_ostream &OS);
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Error validateRecord(const InstrProfRecord &Func);
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/// Write \c Record in text format to \c OS
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static void writeRecordInText(StringRef Name, uint64_t Hash,
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const InstrProfRecord &Counters,
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InstrProfSymtab &Symtab, raw_fd_ostream &OS);
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/// Write the profile, returning the raw data. For testing.
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std::unique_ptr<MemoryBuffer> writeBuffer();
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/// Set the ProfileKind. Report error if mixing FE and IR level profiles.
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/// \c WithCS indicates if this is for contenxt sensitive instrumentation.
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Error setIsIRLevelProfile(bool IsIRLevel, bool WithCS) {
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if (ProfileKind == PF_Unknown) {
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if (IsIRLevel)
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ProfileKind = WithCS ? PF_IRLevelWithCS : PF_IRLevel;
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else
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ProfileKind = PF_FE;
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return Error::success();
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}
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if (((ProfileKind != PF_FE) && !IsIRLevel) ||
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((ProfileKind == PF_FE) && IsIRLevel))
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return make_error<InstrProfError>(instrprof_error::unsupported_version);
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// When merging a context-sensitive profile (WithCS == true) with an IRLevel
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// profile, set the kind to PF_IRLevelWithCS.
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if (ProfileKind == PF_IRLevel && WithCS)
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ProfileKind = PF_IRLevelWithCS;
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return Error::success();
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}
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void setInstrEntryBBEnabled(bool Enabled) { InstrEntryBBEnabled = Enabled; }
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// Internal interface for testing purpose only.
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void setValueProfDataEndianness(support::endianness Endianness);
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void setOutputSparse(bool Sparse);
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// Compute the overlap b/w this object and Other. Program level result is
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// stored in Overlap and function level result is stored in FuncLevelOverlap.
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void overlapRecord(NamedInstrProfRecord &&Other, OverlapStats &Overlap,
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OverlapStats &FuncLevelOverlap,
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const OverlapFuncFilters &FuncFilter);
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private:
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void addRecord(StringRef Name, uint64_t Hash, InstrProfRecord &&I,
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uint64_t Weight, function_ref<void(Error)> Warn);
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bool shouldEncodeData(const ProfilingData &PD);
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Error writeImpl(ProfOStream &OS);
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};
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} // end namespace llvm
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#endif // LLVM_PROFILEDATA_INSTRPROFWRITER_H
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