1 //===- InstrProf.h - Instrumented profiling format support ------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Instrumentation-based profiling data is generated by instrumented
11 // binaries through library functions in compiler-rt, and read by the clang
12 // frontend to feed PGO.
14 //===----------------------------------------------------------------------===//
16 #ifndef LLVM_PROFILEDATA_INSTRPROF_H
17 #define LLVM_PROFILEDATA_INSTRPROF_H
19 #include "llvm/ADT/ArrayRef.h"
20 #include "llvm/ADT/STLExtras.h"
21 #include "llvm/ADT/StringRef.h"
22 #include "llvm/ADT/StringSet.h"
23 #include "llvm/ADT/Triple.h"
24 #include "llvm/IR/GlobalValue.h"
25 #include "llvm/IR/ProfileSummary.h"
26 #include "llvm/ProfileData/InstrProfData.inc"
27 #include "llvm/Support/Compiler.h"
28 #include "llvm/Support/Endian.h"
29 #include "llvm/Support/Error.h"
30 #include "llvm/Support/ErrorHandling.h"
31 #include "llvm/Support/Host.h"
32 #include "llvm/Support/MD5.h"
33 #include "llvm/Support/MathExtras.h"
34 #include "llvm/Support/raw_ostream.h"
43 #include <system_error>
51 struct InstrProfRecord;
52 class InstrProfSymtab;
57 enum InstrProfSectKind {
58 #define INSTR_PROF_SECT_ENTRY(Kind, SectNameCommon, SectNameCoff, Prefix) Kind,
59 #include "llvm/ProfileData/InstrProfData.inc"
62 /// Return the name of the profile section corresponding to \p IPSK.
64 /// The name of the section depends on the object format type \p OF. If
65 /// \p AddSegmentInfo is true, a segment prefix and additional linker hints may
66 /// be added to the section name (this is the default).
67 std::string getInstrProfSectionName(InstrProfSectKind IPSK,
68 Triple::ObjectFormatType OF,
69 bool AddSegmentInfo = true);
71 /// Return the name profile runtime entry point to do value profiling
73 inline StringRef getInstrProfValueProfFuncName() {
74 return INSTR_PROF_VALUE_PROF_FUNC_STR;
77 /// Return the name profile runtime entry point to do value range profiling.
78 inline StringRef getInstrProfValueRangeProfFuncName() {
79 return INSTR_PROF_VALUE_RANGE_PROF_FUNC_STR;
82 /// Return the name prefix of variables containing instrumented function names.
83 inline StringRef getInstrProfNameVarPrefix() { return "__profn_"; }
85 /// Return the name prefix of variables containing per-function control data.
86 inline StringRef getInstrProfDataVarPrefix() { return "__profd_"; }
88 /// Return the name prefix of profile counter variables.
89 inline StringRef getInstrProfCountersVarPrefix() { return "__profc_"; }
91 /// Return the name prefix of value profile variables.
92 inline StringRef getInstrProfValuesVarPrefix() { return "__profvp_"; }
94 /// Return the name of value profile node array variables:
95 inline StringRef getInstrProfVNodesVarName() { return "__llvm_prf_vnodes"; }
97 /// Return the name prefix of the COMDAT group for instrumentation variables
98 /// associated with a COMDAT function.
99 inline StringRef getInstrProfComdatPrefix() { return "__profv_"; }
101 /// Return the name of the variable holding the strings (possibly compressed)
102 /// of all function's PGO names.
103 inline StringRef getInstrProfNamesVarName() {
104 return "__llvm_prf_nm";
107 /// Return the name of a covarage mapping variable (internal linkage)
108 /// for each instrumented source module. Such variables are allocated
109 /// in the __llvm_covmap section.
110 inline StringRef getCoverageMappingVarName() {
111 return "__llvm_coverage_mapping";
114 /// Return the name of the internal variable recording the array
115 /// of PGO name vars referenced by the coverage mapping. The owning
116 /// functions of those names are not emitted by FE (e.g, unused inline
118 inline StringRef getCoverageUnusedNamesVarName() {
119 return "__llvm_coverage_names";
122 /// Return the name of function that registers all the per-function control
123 /// data at program startup time by calling __llvm_register_function. This
124 /// function has internal linkage and is called by __llvm_profile_init
125 /// runtime method. This function is not generated for these platforms:
126 /// Darwin, Linux, and FreeBSD.
127 inline StringRef getInstrProfRegFuncsName() {
128 return "__llvm_profile_register_functions";
131 /// Return the name of the runtime interface that registers per-function control
132 /// data for one instrumented function.
133 inline StringRef getInstrProfRegFuncName() {
134 return "__llvm_profile_register_function";
137 /// Return the name of the runtime interface that registers the PGO name strings.
138 inline StringRef getInstrProfNamesRegFuncName() {
139 return "__llvm_profile_register_names_function";
142 /// Return the name of the runtime initialization method that is generated by
143 /// the compiler. The function calls __llvm_profile_register_functions and
144 /// __llvm_profile_override_default_filename functions if needed. This function
145 /// has internal linkage and invoked at startup time via init_array.
146 inline StringRef getInstrProfInitFuncName() { return "__llvm_profile_init"; }
148 /// Return the name of the hook variable defined in profile runtime library.
149 /// A reference to the variable causes the linker to link in the runtime
150 /// initialization module (which defines the hook variable).
151 inline StringRef getInstrProfRuntimeHookVarName() {
152 return INSTR_PROF_QUOTE(INSTR_PROF_PROFILE_RUNTIME_VAR);
155 /// Return the name of the compiler generated function that references the
156 /// runtime hook variable. The function is a weak global.
157 inline StringRef getInstrProfRuntimeHookVarUseFuncName() {
158 return "__llvm_profile_runtime_user";
161 /// Return the marker used to separate PGO names during serialization.
162 inline StringRef getInstrProfNameSeparator() { return "\01"; }
164 /// Return the modified name for function \c F suitable to be
165 /// used the key for profile lookup. Variable \c InLTO indicates if this
166 /// is called in LTO optimization passes.
167 std::string getPGOFuncName(const Function &F, bool InLTO = false,
168 uint64_t Version = INSTR_PROF_INDEX_VERSION);
170 /// Return the modified name for a function suitable to be
171 /// used the key for profile lookup. The function's original
172 /// name is \c RawFuncName and has linkage of type \c Linkage.
173 /// The function is defined in module \c FileName.
174 std::string getPGOFuncName(StringRef RawFuncName,
175 GlobalValue::LinkageTypes Linkage,
177 uint64_t Version = INSTR_PROF_INDEX_VERSION);
179 /// Return the name of the global variable used to store a function
180 /// name in PGO instrumentation. \c FuncName is the name of the function
181 /// returned by the \c getPGOFuncName call.
182 std::string getPGOFuncNameVarName(StringRef FuncName,
183 GlobalValue::LinkageTypes Linkage);
185 /// Create and return the global variable for function name used in PGO
186 /// instrumentation. \c FuncName is the name of the function returned
187 /// by \c getPGOFuncName call.
188 GlobalVariable *createPGOFuncNameVar(Function &F, StringRef PGOFuncName);
190 /// Create and return the global variable for function name used in PGO
191 /// instrumentation. /// \c FuncName is the name of the function
192 /// returned by \c getPGOFuncName call, \c M is the owning module,
193 /// and \c Linkage is the linkage of the instrumented function.
194 GlobalVariable *createPGOFuncNameVar(Module &M,
195 GlobalValue::LinkageTypes Linkage,
196 StringRef PGOFuncName);
198 /// Return the initializer in string of the PGO name var \c NameVar.
199 StringRef getPGOFuncNameVarInitializer(GlobalVariable *NameVar);
201 /// Given a PGO function name, remove the filename prefix and return
202 /// the original (static) function name.
203 StringRef getFuncNameWithoutPrefix(StringRef PGOFuncName,
204 StringRef FileName = "<unknown>");
206 /// Given a vector of strings (function PGO names) \c NameStrs, the
207 /// method generates a combined string \c Result thatis ready to be
208 /// serialized. The \c Result string is comprised of three fields:
209 /// The first field is the legnth of the uncompressed strings, and the
210 /// the second field is the length of the zlib-compressed string.
211 /// Both fields are encoded in ULEB128. If \c doCompress is false, the
212 /// third field is the uncompressed strings; otherwise it is the
213 /// compressed string. When the string compression is off, the
214 /// second field will have value zero.
215 Error collectPGOFuncNameStrings(const std::vector<std::string> &NameStrs,
216 bool doCompression, std::string &Result);
218 /// Produce \c Result string with the same format described above. The input
219 /// is vector of PGO function name variables that are referenced.
220 Error collectPGOFuncNameStrings(const std::vector<GlobalVariable *> &NameVars,
221 std::string &Result, bool doCompression = true);
223 /// \c NameStrings is a string composed of one of more sub-strings encoded in
224 /// the format described above. The substrings are separated by 0 or more zero
225 /// bytes. This method decodes the string and populates the \c Symtab.
226 Error readPGOFuncNameStrings(StringRef NameStrings, InstrProfSymtab &Symtab);
228 /// Check if INSTR_PROF_RAW_VERSION_VAR is defined. This global is only being
229 /// set in IR PGO compilation.
230 bool isIRPGOFlagSet(const Module *M);
232 /// Check if we can safely rename this Comdat function. Instances of the same
233 /// comdat function may have different control flows thus can not share the
234 /// same counter variable.
235 bool canRenameComdatFunc(const Function &F, bool CheckAddressTaken = false);
237 enum InstrProfValueKind : uint32_t {
238 #define VALUE_PROF_KIND(Enumerator, Value) Enumerator = Value,
239 #include "llvm/ProfileData/InstrProfData.inc"
242 /// Get the value profile data for value site \p SiteIdx from \p InstrProfR
243 /// and annotate the instruction \p Inst with the value profile meta data.
244 /// Annotate up to \p MaxMDCount (default 3) number of records per value site.
245 void annotateValueSite(Module &M, Instruction &Inst,
246 const InstrProfRecord &InstrProfR,
247 InstrProfValueKind ValueKind, uint32_t SiteIndx,
248 uint32_t MaxMDCount = 3);
250 /// Same as the above interface but using an ArrayRef, as well as \p Sum.
251 void annotateValueSite(Module &M, Instruction &Inst,
252 ArrayRef<InstrProfValueData> VDs,
253 uint64_t Sum, InstrProfValueKind ValueKind,
254 uint32_t MaxMDCount);
256 /// Extract the value profile data from \p Inst which is annotated with
257 /// value profile meta data. Return false if there is no value data annotated,
258 /// otherwise return true.
259 bool getValueProfDataFromInst(const Instruction &Inst,
260 InstrProfValueKind ValueKind,
261 uint32_t MaxNumValueData,
262 InstrProfValueData ValueData[],
263 uint32_t &ActualNumValueData, uint64_t &TotalC);
265 inline StringRef getPGOFuncNameMetadataName() { return "PGOFuncName"; }
267 /// Return the PGOFuncName meta data associated with a function.
268 MDNode *getPGOFuncNameMetadata(const Function &F);
270 /// Create the PGOFuncName meta data if PGOFuncName is different from
271 /// function's raw name. This should only apply to internal linkage functions
272 /// declared by users only.
273 void createPGOFuncNameMetadata(Function &F, StringRef PGOFuncName);
275 /// Check if we can use Comdat for profile variables. This will eliminate
276 /// the duplicated profile variables for Comdat functions.
277 bool needsComdatForCounter(const Function &F, const Module &M);
279 const std::error_category &instrprof_category();
281 enum class instrprof_error {
288 unsupported_hash_type,
296 value_site_count_mismatch,
302 inline std::error_code make_error_code(instrprof_error E) {
303 return std::error_code(static_cast<int>(E), instrprof_category());
306 class InstrProfError : public ErrorInfo<InstrProfError> {
308 InstrProfError(instrprof_error Err) : Err(Err) {
309 assert(Err != instrprof_error::success && "Not an error");
312 std::string message() const override;
314 void log(raw_ostream &OS) const override { OS << message(); }
316 std::error_code convertToErrorCode() const override {
317 return make_error_code(Err);
320 instrprof_error get() const { return Err; }
322 /// Consume an Error and return the raw enum value contained within it. The
323 /// Error must either be a success value, or contain a single InstrProfError.
324 static instrprof_error take(Error E) {
325 auto Err = instrprof_error::success;
326 handleAllErrors(std::move(E), [&Err](const InstrProfError &IPE) {
327 assert(Err == instrprof_error::success && "Multiple errors encountered");
339 class SoftInstrProfErrors {
340 /// Count the number of soft instrprof_errors encountered and keep track of
341 /// the first such error for reporting purposes.
343 /// The first soft error encountered.
344 instrprof_error FirstError = instrprof_error::success;
346 /// The number of hash mismatches.
347 unsigned NumHashMismatches = 0;
349 /// The number of count mismatches.
350 unsigned NumCountMismatches = 0;
352 /// The number of counter overflows.
353 unsigned NumCounterOverflows = 0;
355 /// The number of value site count mismatches.
356 unsigned NumValueSiteCountMismatches = 0;
359 SoftInstrProfErrors() = default;
361 ~SoftInstrProfErrors() {
362 assert(FirstError == instrprof_error::success &&
363 "Unchecked soft error encountered");
366 /// Track a soft error (\p IE) and increment its associated counter.
367 void addError(instrprof_error IE);
369 /// Get the number of hash mismatches.
370 unsigned getNumHashMismatches() const { return NumHashMismatches; }
372 /// Get the number of count mismatches.
373 unsigned getNumCountMismatches() const { return NumCountMismatches; }
375 /// Get the number of counter overflows.
376 unsigned getNumCounterOverflows() const { return NumCounterOverflows; }
378 /// Get the number of value site count mismatches.
379 unsigned getNumValueSiteCountMismatches() const {
380 return NumValueSiteCountMismatches;
383 /// Return the first encountered error and reset FirstError to a success
386 if (FirstError == instrprof_error::success)
387 return Error::success();
388 auto E = make_error<InstrProfError>(FirstError);
389 FirstError = instrprof_error::success;
398 } // end namespace object
400 namespace IndexedInstrProf {
402 uint64_t ComputeHash(StringRef K);
404 } // end namespace IndexedInstrProf
406 /// A symbol table used for function PGO name look-up with keys
407 /// (such as pointers, md5hash values) to the function. A function's
408 /// PGO name or name's md5hash are used in retrieving the profile
409 /// data of the function. See \c getPGOFuncName() method for details
410 /// on how PGO name is formed.
411 class InstrProfSymtab {
413 typedef std::vector<std::pair<uint64_t, uint64_t>> AddrHashMap;
417 uint64_t Address = 0;
418 // Unique name strings.
420 // A map from MD5 keys to function name strings.
421 std::vector<std::pair<uint64_t, StringRef>> MD5NameMap;
422 // A map from MD5 keys to function define. We only populate this map
423 // when build the Symtab from a Module.
424 std::vector<std::pair<uint64_t, Function *>> MD5FuncMap;
425 // A map from function runtime address to function name MD5 hash.
426 // This map is only populated and used by raw instr profile reader.
427 AddrHashMap AddrToMD5Map;
430 InstrProfSymtab() = default;
432 /// Create InstrProfSymtab from an object file section which
433 /// contains function PGO names. When section may contain raw
434 /// string data or string data in compressed form. This method
435 /// only initialize the symtab with reference to the data and
436 /// the section base address. The decompression will be delayed
437 /// until before it is used. See also \c create(StringRef) method.
438 Error create(object::SectionRef &Section);
440 /// This interface is used by reader of CoverageMapping test
442 inline Error create(StringRef D, uint64_t BaseAddr);
444 /// \c NameStrings is a string composed of one of more sub-strings
445 /// encoded in the format described in \c collectPGOFuncNameStrings.
446 /// This method is a wrapper to \c readPGOFuncNameStrings method.
447 inline Error create(StringRef NameStrings);
449 /// A wrapper interface to populate the PGO symtab with functions
450 /// decls from module \c M. This interface is used by transformation
451 /// passes such as indirect function call promotion. Variable \c InLTO
452 /// indicates if this is called from LTO optimization passes.
453 void create(Module &M, bool InLTO = false);
455 /// Create InstrProfSymtab from a set of names iteratable from
456 /// \p IterRange. This interface is used by IndexedProfReader.
457 template <typename NameIterRange> void create(const NameIterRange &IterRange);
459 // If the symtab is created by a series of calls to \c addFuncName, \c
460 // finalizeSymtab needs to be called before looking up function names.
461 // This is required because the underlying map is a vector (for space
462 // efficiency) which needs to be sorted.
463 inline void finalizeSymtab();
465 /// Update the symtab by adding \p FuncName to the table. This interface
466 /// is used by the raw and text profile readers.
467 void addFuncName(StringRef FuncName) {
468 auto Ins = NameTab.insert(FuncName);
470 MD5NameMap.push_back(std::make_pair(
471 IndexedInstrProf::ComputeHash(FuncName), Ins.first->getKey()));
474 /// Map a function address to its name's MD5 hash. This interface
475 /// is only used by the raw profiler reader.
476 void mapAddress(uint64_t Addr, uint64_t MD5Val) {
477 AddrToMD5Map.push_back(std::make_pair(Addr, MD5Val));
480 AddrHashMap &getAddrHashMap() { return AddrToMD5Map; }
482 /// Return function's PGO name from the function name's symbol
483 /// address in the object file. If an error occurs, return
485 StringRef getFuncName(uint64_t FuncNameAddress, size_t NameSize);
487 /// Return function's PGO name from the name's md5 hash value.
488 /// If not found, return an empty string.
489 inline StringRef getFuncName(uint64_t FuncMD5Hash);
491 /// Return function from the name's md5 hash. Return nullptr if not found.
492 inline Function *getFunction(uint64_t FuncMD5Hash);
494 /// Return the function's original assembly name by stripping off
495 /// the prefix attached (to symbols with priviate linkage). For
496 /// global functions, it returns the same string as getFuncName.
497 inline StringRef getOrigFuncName(uint64_t FuncMD5Hash);
499 /// Return the name section data.
500 inline StringRef getNameData() const { return Data; }
503 Error InstrProfSymtab::create(StringRef D, uint64_t BaseAddr) {
506 return Error::success();
509 Error InstrProfSymtab::create(StringRef NameStrings) {
510 return readPGOFuncNameStrings(NameStrings, *this);
513 template <typename NameIterRange>
514 void InstrProfSymtab::create(const NameIterRange &IterRange) {
515 for (auto Name : IterRange)
521 void InstrProfSymtab::finalizeSymtab() {
522 std::sort(MD5NameMap.begin(), MD5NameMap.end(), less_first());
523 std::sort(MD5FuncMap.begin(), MD5FuncMap.end(), less_first());
524 std::sort(AddrToMD5Map.begin(), AddrToMD5Map.end(), less_first());
525 AddrToMD5Map.erase(std::unique(AddrToMD5Map.begin(), AddrToMD5Map.end()),
529 StringRef InstrProfSymtab::getFuncName(uint64_t FuncMD5Hash) {
531 std::lower_bound(MD5NameMap.begin(), MD5NameMap.end(), FuncMD5Hash,
532 [](const std::pair<uint64_t, std::string> &LHS,
533 uint64_t RHS) { return LHS.first < RHS; });
534 if (Result != MD5NameMap.end() && Result->first == FuncMD5Hash)
535 return Result->second;
539 Function* InstrProfSymtab::getFunction(uint64_t FuncMD5Hash) {
541 std::lower_bound(MD5FuncMap.begin(), MD5FuncMap.end(), FuncMD5Hash,
542 [](const std::pair<uint64_t, Function*> &LHS,
543 uint64_t RHS) { return LHS.first < RHS; });
544 if (Result != MD5FuncMap.end() && Result->first == FuncMD5Hash)
545 return Result->second;
549 // See also getPGOFuncName implementation. These two need to be
551 StringRef InstrProfSymtab::getOrigFuncName(uint64_t FuncMD5Hash) {
552 StringRef PGOName = getFuncName(FuncMD5Hash);
553 size_t S = PGOName.find_first_of(':');
554 if (S == StringRef::npos)
556 return PGOName.drop_front(S + 1);
559 struct InstrProfValueSiteRecord {
560 /// Value profiling data pairs at a given value site.
561 std::list<InstrProfValueData> ValueData;
563 InstrProfValueSiteRecord() { ValueData.clear(); }
564 template <class InputIterator>
565 InstrProfValueSiteRecord(InputIterator F, InputIterator L)
568 /// Sort ValueData ascending by Value
569 void sortByTargetValues() {
571 [](const InstrProfValueData &left, const InstrProfValueData &right) {
572 return left.Value < right.Value;
575 /// Sort ValueData Descending by Count
576 inline void sortByCount();
578 /// Merge data from another InstrProfValueSiteRecord
579 /// Optionally scale merged counts by \p Weight.
580 void merge(SoftInstrProfErrors &SIPE, InstrProfValueSiteRecord &Input,
581 uint64_t Weight = 1);
582 /// Scale up value profile data counts.
583 void scale(SoftInstrProfErrors &SIPE, uint64_t Weight);
586 /// Profiling information for a single function.
587 struct InstrProfRecord {
590 std::vector<uint64_t> Counts;
591 SoftInstrProfErrors SIPE;
593 InstrProfRecord() = default;
594 InstrProfRecord(StringRef Name, uint64_t Hash, std::vector<uint64_t> Counts)
595 : Name(Name), Hash(Hash), Counts(std::move(Counts)) {}
597 typedef std::vector<std::pair<uint64_t, uint64_t>> ValueMapType;
599 /// Return the number of value profile kinds with non-zero number
600 /// of profile sites.
601 inline uint32_t getNumValueKinds() const;
603 /// Return the number of instrumented sites for ValueKind.
604 inline uint32_t getNumValueSites(uint32_t ValueKind) const;
606 /// Return the total number of ValueData for ValueKind.
607 inline uint32_t getNumValueData(uint32_t ValueKind) const;
609 /// Return the number of value data collected for ValueKind at profiling
611 inline uint32_t getNumValueDataForSite(uint32_t ValueKind,
612 uint32_t Site) const;
614 /// Return the array of profiled values at \p Site. If \p TotalC
615 /// is not null, the total count of all target values at this site
616 /// will be stored in \c *TotalC.
617 inline std::unique_ptr<InstrProfValueData[]>
618 getValueForSite(uint32_t ValueKind, uint32_t Site,
619 uint64_t *TotalC = nullptr) const;
621 /// Get the target value/counts of kind \p ValueKind collected at site
622 /// \p Site and store the result in array \p Dest. Return the total
623 /// counts of all target values at this site.
624 inline uint64_t getValueForSite(InstrProfValueData Dest[], uint32_t ValueKind,
625 uint32_t Site) const;
627 /// Reserve space for NumValueSites sites.
628 inline void reserveSites(uint32_t ValueKind, uint32_t NumValueSites);
630 /// Add ValueData for ValueKind at value Site.
631 void addValueData(uint32_t ValueKind, uint32_t Site,
632 InstrProfValueData *VData, uint32_t N,
633 ValueMapType *ValueMap);
635 /// Merge the counts in \p Other into this one.
636 /// Optionally scale merged counts by \p Weight.
637 void merge(InstrProfRecord &Other, uint64_t Weight = 1);
639 /// Scale up profile counts (including value profile data) by
641 void scale(uint64_t Weight);
643 /// Sort value profile data (per site) by count.
644 void sortValueData() {
645 for (uint32_t Kind = IPVK_First; Kind <= IPVK_Last; ++Kind) {
646 std::vector<InstrProfValueSiteRecord> &SiteRecords =
647 getValueSitesForKind(Kind);
648 for (auto &SR : SiteRecords)
653 /// Clear value data entries and edge counters.
659 /// Clear value data entries
660 void clearValueData() {
661 for (uint32_t Kind = IPVK_First; Kind <= IPVK_Last; ++Kind)
662 getValueSitesForKind(Kind).clear();
665 /// Get the error contained within the record's soft error counter.
666 Error takeError() { return SIPE.takeError(); }
669 std::vector<InstrProfValueSiteRecord> IndirectCallSites;
670 std::vector<InstrProfValueSiteRecord> MemOPSizes;
671 const std::vector<InstrProfValueSiteRecord> &
673 getValueSitesForKind(uint32_t ValueKind) const {
675 case IPVK_IndirectCallTarget:
676 return IndirectCallSites;
680 llvm_unreachable("Unknown value kind!");
682 return IndirectCallSites;
685 std::vector<InstrProfValueSiteRecord> &
686 getValueSitesForKind(uint32_t ValueKind) {
687 return const_cast<std::vector<InstrProfValueSiteRecord> &>(
688 const_cast<const InstrProfRecord *>(this)
689 ->getValueSitesForKind(ValueKind));
692 // Map indirect call target name hash to name string.
693 uint64_t remapValue(uint64_t Value, uint32_t ValueKind,
694 ValueMapType *HashKeys);
696 // Merge Value Profile data from Src record to this record for ValueKind.
697 // Scale merged value counts by \p Weight.
698 void mergeValueProfData(uint32_t ValueKind, InstrProfRecord &Src,
701 // Scale up value profile data count.
702 void scaleValueProfData(uint32_t ValueKind, uint64_t Weight);
705 uint32_t InstrProfRecord::getNumValueKinds() const {
706 uint32_t NumValueKinds = 0;
707 for (uint32_t Kind = IPVK_First; Kind <= IPVK_Last; ++Kind)
708 NumValueKinds += !(getValueSitesForKind(Kind).empty());
709 return NumValueKinds;
712 uint32_t InstrProfRecord::getNumValueData(uint32_t ValueKind) const {
714 const std::vector<InstrProfValueSiteRecord> &SiteRecords =
715 getValueSitesForKind(ValueKind);
716 for (auto &SR : SiteRecords) {
717 N += SR.ValueData.size();
722 uint32_t InstrProfRecord::getNumValueSites(uint32_t ValueKind) const {
723 return getValueSitesForKind(ValueKind).size();
726 uint32_t InstrProfRecord::getNumValueDataForSite(uint32_t ValueKind,
727 uint32_t Site) const {
728 return getValueSitesForKind(ValueKind)[Site].ValueData.size();
731 std::unique_ptr<InstrProfValueData[]>
732 InstrProfRecord::getValueForSite(uint32_t ValueKind, uint32_t Site,
733 uint64_t *TotalC) const {
735 uint64_t &TotalCount = (TotalC == nullptr ? Dummy : *TotalC);
736 uint32_t N = getNumValueDataForSite(ValueKind, Site);
739 return std::unique_ptr<InstrProfValueData[]>(nullptr);
742 auto VD = llvm::make_unique<InstrProfValueData[]>(N);
743 TotalCount = getValueForSite(VD.get(), ValueKind, Site);
748 uint64_t InstrProfRecord::getValueForSite(InstrProfValueData Dest[],
750 uint32_t Site) const {
752 uint64_t TotalCount = 0;
753 for (auto V : getValueSitesForKind(ValueKind)[Site].ValueData) {
754 Dest[I].Value = V.Value;
755 Dest[I].Count = V.Count;
756 TotalCount = SaturatingAdd(TotalCount, V.Count);
762 void InstrProfRecord::reserveSites(uint32_t ValueKind, uint32_t NumValueSites) {
763 std::vector<InstrProfValueSiteRecord> &ValueSites =
764 getValueSitesForKind(ValueKind);
765 ValueSites.reserve(NumValueSites);
768 inline support::endianness getHostEndianness() {
769 return sys::IsLittleEndianHost ? support::little : support::big;
772 // Include definitions for value profile data
773 #define INSTR_PROF_VALUE_PROF_DATA
774 #include "llvm/ProfileData/InstrProfData.inc"
776 void InstrProfValueSiteRecord::sortByCount() {
778 [](const InstrProfValueData &left, const InstrProfValueData &right) {
779 return left.Count > right.Count;
782 size_t max_s = INSTR_PROF_MAX_NUM_VAL_PER_SITE;
783 if (ValueData.size() > max_s)
784 ValueData.resize(max_s);
787 namespace IndexedInstrProf {
789 enum class HashT : uint32_t {
794 inline uint64_t ComputeHash(HashT Type, StringRef K) {
799 llvm_unreachable("Unhandled hash type");
802 const uint64_t Magic = 0x8169666f72706cff; // "\xfflprofi\x81"
805 // Version 1 is the first version. In this version, the value of
806 // a key/value pair can only include profile data of a single function.
807 // Due to this restriction, the number of block counters for a given
808 // function is not recorded but derived from the length of the value.
810 // The version 2 format supports recording profile data of multiple
811 // functions which share the same key in one value field. To support this,
812 // the number block counters is recorded as an uint64_t field right after the
813 // function structural hash.
815 // Version 3 supports value profile data. The value profile data is expected
816 // to follow the block counter profile data.
818 // In this version, profile summary data \c IndexedInstrProf::Summary is
819 // stored after the profile header.
821 // The current version is 4.
822 CurrentVersion = INSTR_PROF_INDEX_VERSION
824 const uint64_t Version = ProfVersion::CurrentVersion;
826 const HashT HashType = HashT::MD5;
828 inline uint64_t ComputeHash(StringRef K) { return ComputeHash(HashType, K); }
830 // This structure defines the file header of the LLVM profile
831 // data file in indexed-format.
835 uint64_t Unused; // Becomes unused since version 4
840 // Profile summary data recorded in the profile data file in indexed
841 // format. It is introduced in version 4. The summary data follows
842 // right after the profile file header.
845 uint64_t Cutoff; ///< The required percentile of total execution count.
847 MinBlockCount; ///< The minimum execution count for this percentile.
848 uint64_t NumBlocks; ///< Number of blocks >= the minumum execution count.
850 // The field kind enumerator to assigned value mapping should remain
851 // unchanged when a new kind is added or an old kind gets deleted in
853 enum SummaryFieldKind {
854 /// The total number of functions instrumented.
855 TotalNumFunctions = 0,
856 /// Total number of instrumented blocks/edges.
858 /// The maximal execution count among all functions.
859 /// This field does not exist for profile data from IR based
861 MaxFunctionCount = 2,
862 /// Max block count of the program.
864 /// Max internal block count of the program (excluding entry blocks).
865 MaxInternalBlockCount = 4,
866 /// The sum of all instrumented block counts.
868 NumKinds = TotalBlockCount + 1
871 // The number of summmary fields following the summary header.
872 uint64_t NumSummaryFields;
873 // The number of Cutoff Entries (Summary::Entry) following summary fields.
874 uint64_t NumCutoffEntries;
876 static uint32_t getSize(uint32_t NumSumFields, uint32_t NumCutoffEntries) {
877 return sizeof(Summary) + NumCutoffEntries * sizeof(Entry) +
878 NumSumFields * sizeof(uint64_t);
881 const uint64_t *getSummaryDataBase() const {
882 return reinterpret_cast<const uint64_t *>(this + 1);
885 uint64_t *getSummaryDataBase() {
886 return reinterpret_cast<uint64_t *>(this + 1);
889 const Entry *getCutoffEntryBase() const {
890 return reinterpret_cast<const Entry *>(
891 &getSummaryDataBase()[NumSummaryFields]);
894 Entry *getCutoffEntryBase() {
895 return reinterpret_cast<Entry *>(&getSummaryDataBase()[NumSummaryFields]);
898 uint64_t get(SummaryFieldKind K) const {
899 return getSummaryDataBase()[K];
902 void set(SummaryFieldKind K, uint64_t V) {
903 getSummaryDataBase()[K] = V;
906 const Entry &getEntry(uint32_t I) const { return getCutoffEntryBase()[I]; }
908 void setEntry(uint32_t I, const ProfileSummaryEntry &E) {
909 Entry &ER = getCutoffEntryBase()[I];
910 ER.Cutoff = E.Cutoff;
911 ER.MinBlockCount = E.MinCount;
912 ER.NumBlocks = E.NumCounts;
915 Summary(uint32_t Size) { memset(this, 0, Size); }
916 void operator delete(void *ptr) { ::operator delete(ptr); }
921 inline std::unique_ptr<Summary> allocSummary(uint32_t TotalSize) {
922 return std::unique_ptr<Summary>(new (::operator new(TotalSize))
926 } // end namespace IndexedInstrProf
928 namespace RawInstrProf {
930 // Version 1: First version
931 // Version 2: Added value profile data section. Per-function control data
932 // struct has more fields to describe value profile information.
933 // Version 3: Compressed name section support. Function PGO name reference
934 // from control data struct is changed from raw pointer to Name's MD5 value.
935 // Version 4: ValueDataBegin and ValueDataSizes fields are removed from the
937 const uint64_t Version = INSTR_PROF_RAW_VERSION;
939 template <class IntPtrT> inline uint64_t getMagic();
940 template <> inline uint64_t getMagic<uint64_t>() {
941 return INSTR_PROF_RAW_MAGIC_64;
944 template <> inline uint64_t getMagic<uint32_t>() {
945 return INSTR_PROF_RAW_MAGIC_32;
948 // Per-function profile data header/control structure.
949 // The definition should match the structure defined in
950 // compiler-rt/lib/profile/InstrProfiling.h.
951 // It should also match the synthesized type in
952 // Transforms/Instrumentation/InstrProfiling.cpp:getOrCreateRegionCounters.
953 template <class IntPtrT> struct LLVM_ALIGNAS(8) ProfileData {
954 #define INSTR_PROF_DATA(Type, LLVMType, Name, Init) Type Name;
955 #include "llvm/ProfileData/InstrProfData.inc"
958 // File header structure of the LLVM profile data in raw format.
959 // The definition should match the header referenced in
960 // compiler-rt/lib/profile/InstrProfilingFile.c and
961 // InstrProfilingBuffer.c.
963 #define INSTR_PROF_RAW_HEADER(Type, Name, Init) const Type Name;
964 #include "llvm/ProfileData/InstrProfData.inc"
967 } // end namespace RawInstrProf
969 // Parse MemOP Size range option.
970 void getMemOPSizeRangeFromOption(std::string Str, int64_t &RangeStart,
973 } // end namespace llvm
975 #endif // LLVM_PROFILEDATA_INSTRPROF_H