1//=-- SampleProf.cpp - Sample profiling format support --------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file contains common definitions used in the reading and writing of
10// sample profile data.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/ProfileData/SampleProf.h"
15#include "llvm/Config/llvm-config.h"
16#include "llvm/IR/DebugInfoMetadata.h"
17#include "llvm/IR/PseudoProbe.h"
18#include "llvm/ProfileData/SampleProfReader.h"
19#include "llvm/Support/CommandLine.h"
20#include "llvm/Support/Compiler.h"
21#include "llvm/Support/Debug.h"
22#include "llvm/Support/ErrorHandling.h"
23#include "llvm/Support/LEB128.h"
24#include "llvm/Support/raw_ostream.h"
25#include <algorithm>
26#include <cstdint>
27#include <string>
28#include <system_error>
29
30using namespace llvm;
31using namespace sampleprof;
32
33static cl::opt<uint64_t> ProfileSymbolListCutOff(
34 "profile-symbol-list-cutoff", cl::Hidden, cl::init(Val: -1),
35 cl::desc("Cutoff value about how many symbols in profile symbol list "
36 "will be used. This is very useful for performance debugging"));
37
38static cl::opt<bool> GenerateMergedBaseProfiles(
39 "generate-merged-base-profiles",
40 cl::desc("When generating nested context-sensitive profiles, always "
41 "generate extra base profile for function with all its context "
42 "profiles merged into it."));
43
44namespace llvm {
45namespace sampleprof {
46bool FunctionSamples::ProfileIsProbeBased = false;
47bool FunctionSamples::ProfileIsCS = false;
48bool FunctionSamples::ProfileIsPreInlined = false;
49bool FunctionSamples::UseMD5 = false;
50bool FunctionSamples::HasUniqSuffix = true;
51bool FunctionSamples::ProfileIsFS = false;
52
53std::error_code
54serializeTypeMap(const TypeCountMap &Map,
55 const MapVector<FunctionId, uint32_t> &NameTable,
56 raw_ostream &OS) {
57 encodeULEB128(Value: Map.size(), OS);
58 for (const auto &[TypeName, SampleCount] : Map) {
59 if (auto NameIndexIter = NameTable.find(Key: TypeName);
60 NameIndexIter != NameTable.end()) {
61 encodeULEB128(Value: NameIndexIter->second, OS);
62 } else {
63 // If the type is not in the name table, we cannot serialize it.
64 return sampleprof_error::truncated_name_table;
65 }
66 encodeULEB128(Value: SampleCount, OS);
67 }
68 return sampleprof_error::success;
69}
70} // namespace sampleprof
71} // namespace llvm
72
73namespace {
74
75// FIXME: This class is only here to support the transition to llvm::Error. It
76// will be removed once this transition is complete. Clients should prefer to
77// deal with the Error value directly, rather than converting to error_code.
78class SampleProfErrorCategoryType : public std::error_category {
79 const char *name() const noexcept override { return "llvm.sampleprof"; }
80
81 std::string message(int IE) const override {
82 sampleprof_error E = static_cast<sampleprof_error>(IE);
83 switch (E) {
84 case sampleprof_error::success:
85 return "Success";
86 case sampleprof_error::bad_magic:
87 return "Invalid sample profile data (bad magic)";
88 case sampleprof_error::unsupported_version:
89 return "Unsupported sample profile format version";
90 case sampleprof_error::too_large:
91 return "Too much profile data";
92 case sampleprof_error::truncated:
93 return "Truncated profile data";
94 case sampleprof_error::malformed:
95 return "Malformed sample profile data";
96 case sampleprof_error::unrecognized_format:
97 return "Unrecognized sample profile encoding format";
98 case sampleprof_error::unsupported_writing_format:
99 return "Profile encoding format unsupported for writing operations";
100 case sampleprof_error::truncated_name_table:
101 return "Truncated function name table";
102 case sampleprof_error::not_implemented:
103 return "Unimplemented feature";
104 case sampleprof_error::counter_overflow:
105 return "Counter overflow";
106 case sampleprof_error::ostream_seek_unsupported:
107 return "Ostream does not support seek";
108 case sampleprof_error::uncompress_failed:
109 return "Uncompress failure";
110 case sampleprof_error::zlib_unavailable:
111 return "Zlib is unavailable";
112 case sampleprof_error::hash_mismatch:
113 return "Function hash mismatch";
114 case sampleprof_error::illegal_line_offset:
115 return "Illegal line offset in sample profile data";
116 }
117 llvm_unreachable("A value of sampleprof_error has no message.");
118 }
119};
120
121} // end anonymous namespace
122
123const std::error_category &llvm::sampleprof_category() {
124 static SampleProfErrorCategoryType ErrorCategory;
125 return ErrorCategory;
126}
127
128void LineLocation::print(raw_ostream &OS) const {
129 OS << LineOffset;
130 if (Discriminator > 0)
131 OS << "." << Discriminator;
132}
133
134raw_ostream &llvm::sampleprof::operator<<(raw_ostream &OS,
135 const LineLocation &Loc) {
136 Loc.print(OS);
137 return OS;
138}
139
140/// Merge the samples in \p Other into this record.
141/// Optionally scale sample counts by \p Weight.
142sampleprof_error SampleRecord::merge(const SampleRecord &Other,
143 uint64_t Weight) {
144 sampleprof_error Result;
145 Result = addSamples(S: Other.getSamples(), Weight);
146 for (const auto &I : Other.getCallTargets()) {
147 mergeSampleProfErrors(Accumulator&: Result, Result: addCalledTarget(F: I.first, S: I.second, Weight));
148 }
149 return Result;
150}
151
152std::error_code SampleRecord::serialize(
153 raw_ostream &OS, const MapVector<FunctionId, uint32_t> &NameTable) const {
154 encodeULEB128(Value: getSamples(), OS);
155 encodeULEB128(Value: getCallTargets().size(), OS);
156 for (const auto &J : getSortedCallTargets()) {
157 FunctionId Callee = J.first;
158 uint64_t CalleeSamples = J.second;
159 if (auto NameIndexIter = NameTable.find(Key: Callee);
160 NameIndexIter != NameTable.end()) {
161 encodeULEB128(Value: NameIndexIter->second, OS);
162 } else {
163 // If the callee is not in the name table, we cannot serialize it.
164 return sampleprof_error::truncated_name_table;
165 }
166 encodeULEB128(Value: CalleeSamples, OS);
167 }
168 return sampleprof_error::success;
169}
170
171#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
172LLVM_DUMP_METHOD void LineLocation::dump() const { print(dbgs()); }
173#endif
174
175void LineLocation::serialize(raw_ostream &OS) const {
176 encodeULEB128(Value: LineOffset, OS);
177 encodeULEB128(Value: Discriminator, OS);
178}
179
180/// Print the sample record to the stream \p OS indented by \p Indent.
181void SampleRecord::print(raw_ostream &OS, unsigned Indent) const {
182 OS << NumSamples;
183 if (hasCalls()) {
184 OS << ", calls:";
185 for (const auto &I : getSortedCallTargets())
186 OS << " " << I.first << ":" << I.second;
187 }
188 OS << "\n";
189}
190
191#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
192LLVM_DUMP_METHOD void SampleRecord::dump() const { print(dbgs(), 0); }
193#endif
194
195raw_ostream &llvm::sampleprof::operator<<(raw_ostream &OS,
196 const SampleRecord &Sample) {
197 Sample.print(OS, Indent: 0);
198 return OS;
199}
200
201static void printTypeCountMap(raw_ostream &OS, LineLocation Loc,
202 const TypeCountMap &TypeCountMap) {
203 if (TypeCountMap.empty()) {
204 return;
205 }
206 OS << Loc << ": vtables: ";
207 for (const auto &[Type, Count] : TypeCountMap)
208 OS << Type << ":" << Count << " ";
209 OS << "\n";
210}
211
212/// Print the samples collected for a function on stream \p OS.
213void FunctionSamples::print(raw_ostream &OS, unsigned Indent) const {
214 if (getFunctionHash())
215 OS << "CFG checksum " << getFunctionHash() << "\n";
216
217 OS << TotalSamples << ", " << TotalHeadSamples << ", " << BodySamples.size()
218 << " sampled lines\n";
219
220 OS.indent(NumSpaces: Indent);
221 if (!BodySamples.empty()) {
222 OS << "Samples collected in the function's body {\n";
223 SampleSorter<LineLocation, SampleRecord> SortedBodySamples(BodySamples);
224 for (const auto &SI : SortedBodySamples.get()) {
225 OS.indent(NumSpaces: Indent + 2);
226 const auto &Loc = SI->first;
227 OS << SI->first << ": " << SI->second;
228 if (const TypeCountMap *TypeCountMap =
229 this->findCallsiteTypeSamplesAt(Loc)) {
230 OS.indent(NumSpaces: Indent + 2);
231 printTypeCountMap(OS, Loc, TypeCountMap: *TypeCountMap);
232 }
233 }
234 OS.indent(NumSpaces: Indent);
235 OS << "}\n";
236 } else {
237 OS << "No samples collected in the function's body\n";
238 }
239
240 OS.indent(NumSpaces: Indent);
241 if (!CallsiteSamples.empty()) {
242 OS << "Samples collected in inlined callsites {\n";
243 SampleSorter<LineLocation, FunctionSamplesMap> SortedCallsiteSamples(
244 CallsiteSamples);
245 for (const auto *Element : SortedCallsiteSamples.get()) {
246 // Element is a pointer to a pair of LineLocation and FunctionSamplesMap.
247 const auto &[Loc, FunctionSampleMap] = *Element;
248 for (const FunctionSamples &FuncSample :
249 llvm::make_second_range(c: FunctionSampleMap)) {
250 OS.indent(NumSpaces: Indent + 2);
251 OS << Loc << ": inlined callee: " << FuncSample.getFunction() << ": ";
252 FuncSample.print(OS, Indent: Indent + 4);
253 }
254 auto TypeSamplesIter = VirtualCallsiteTypeCounts.find(x: Loc);
255 if (TypeSamplesIter != VirtualCallsiteTypeCounts.end()) {
256 OS.indent(NumSpaces: Indent + 2);
257 printTypeCountMap(OS, Loc, TypeCountMap: TypeSamplesIter->second);
258 }
259 }
260 OS.indent(NumSpaces: Indent);
261 OS << "}\n";
262 } else {
263 OS << "No inlined callsites in this function\n";
264 }
265}
266
267raw_ostream &llvm::sampleprof::operator<<(raw_ostream &OS,
268 const FunctionSamples &FS) {
269 FS.print(OS);
270 return OS;
271}
272
273void sampleprof::sortFuncProfiles(
274 const SampleProfileMap &ProfileMap,
275 std::vector<NameFunctionSamples> &SortedProfiles) {
276 for (const auto &I : ProfileMap) {
277 SortedProfiles.push_back(x: std::make_pair(x: I.first, y: &I.second));
278 }
279 llvm::stable_sort(Range&: SortedProfiles, C: [](const NameFunctionSamples &A,
280 const NameFunctionSamples &B) {
281 if (A.second->getTotalSamples() == B.second->getTotalSamples())
282 return A.second->getContext() < B.second->getContext();
283 return A.second->getTotalSamples() > B.second->getTotalSamples();
284 });
285}
286
287unsigned FunctionSamples::getOffset(const DILocation *DIL) {
288 return (DIL->getLine() - DIL->getScope()->getSubprogram()->getLine()) &
289 0xffff;
290}
291
292LineLocation FunctionSamples::getCallSiteIdentifier(const DILocation *DIL,
293 bool ProfileIsFS) {
294 if (FunctionSamples::ProfileIsProbeBased) {
295 // In a pseudo-probe based profile, a callsite is simply represented by the
296 // ID of the probe associated with the call instruction. The probe ID is
297 // encoded in the Discriminator field of the call instruction's debug
298 // metadata.
299 return LineLocation(PseudoProbeDwarfDiscriminator::extractProbeIndex(
300 Value: DIL->getDiscriminator()),
301 0);
302 } else {
303 unsigned Discriminator =
304 ProfileIsFS ? DIL->getDiscriminator() : DIL->getBaseDiscriminator();
305 return LineLocation(FunctionSamples::getOffset(DIL), Discriminator);
306 }
307}
308
309const FunctionSamples *FunctionSamples::findFunctionSamples(
310 const DILocation *DIL, SampleProfileReaderItaniumRemapper *Remapper,
311 const HashKeyMap<std::unordered_map, FunctionId, FunctionId>
312 *FuncNameToProfNameMap) const {
313 assert(DIL);
314 SmallVector<std::pair<LineLocation, StringRef>, 10> S;
315
316 const DILocation *PrevDIL = DIL;
317 for (DIL = DIL->getInlinedAt(); DIL; DIL = DIL->getInlinedAt()) {
318 // Use C++ linkage name if possible.
319 StringRef Name = PrevDIL->getScope()->getSubprogram()->getLinkageName();
320 if (Name.empty())
321 Name = PrevDIL->getScope()->getSubprogram()->getName();
322 S.emplace_back(Args: FunctionSamples::getCallSiteIdentifier(
323 DIL, ProfileIsFS: FunctionSamples::ProfileIsFS),
324 Args&: Name);
325 PrevDIL = DIL;
326 }
327
328 if (S.size() == 0)
329 return this;
330 const FunctionSamples *FS = this;
331 for (int i = S.size() - 1; i >= 0 && FS != nullptr; i--) {
332 FS = FS->findFunctionSamplesAt(Loc: S[i].first, CalleeName: S[i].second, Remapper,
333 FuncNameToProfNameMap);
334 }
335 return FS;
336}
337
338void FunctionSamples::findAllNames(DenseSet<FunctionId> &NameSet) const {
339 NameSet.insert(V: getFunction());
340 for (const auto &BS : BodySamples)
341 NameSet.insert_range(R: llvm::make_first_range(c: BS.second.getCallTargets()));
342
343 for (const auto &CS : CallsiteSamples) {
344 for (const auto &NameFS : CS.second) {
345 NameSet.insert(V: NameFS.first);
346 NameFS.second.findAllNames(NameSet);
347 }
348 }
349}
350
351const FunctionSamples *FunctionSamples::findFunctionSamplesAt(
352 const LineLocation &Loc, StringRef CalleeName,
353 SampleProfileReaderItaniumRemapper *Remapper,
354 const HashKeyMap<std::unordered_map, FunctionId, FunctionId>
355 *FuncNameToProfNameMap) const {
356 CalleeName = getCanonicalFnName(FnName: CalleeName);
357
358 auto I = CallsiteSamples.find(x: mapIRLocToProfileLoc(IRLoc: Loc));
359 if (I == CallsiteSamples.end())
360 return nullptr;
361 auto FS = I->second.find(x: getRepInFormat(Name: CalleeName));
362 if (FS != I->second.end())
363 return &FS->second;
364
365 if (FuncNameToProfNameMap && !FuncNameToProfNameMap->empty()) {
366 auto R = FuncNameToProfNameMap->find(Key: FunctionId(CalleeName));
367 if (R != FuncNameToProfNameMap->end()) {
368 CalleeName = R->second.stringRef();
369 auto FS = I->second.find(x: getRepInFormat(Name: CalleeName));
370 if (FS != I->second.end())
371 return &FS->second;
372 }
373 }
374
375 if (Remapper) {
376 if (auto NameInProfile = Remapper->lookUpNameInProfile(FunctionName: CalleeName)) {
377 auto FS = I->second.find(x: getRepInFormat(Name: *NameInProfile));
378 if (FS != I->second.end())
379 return &FS->second;
380 }
381 }
382 // If we cannot find exact match of the callee name, return the FS with
383 // the max total count. Only do this when CalleeName is not provided,
384 // i.e., only for indirect calls.
385 if (!CalleeName.empty())
386 return nullptr;
387 uint64_t MaxTotalSamples = 0;
388 const FunctionSamples *R = nullptr;
389 for (const auto &NameFS : I->second)
390 if (NameFS.second.getTotalSamples() >= MaxTotalSamples) {
391 MaxTotalSamples = NameFS.second.getTotalSamples();
392 R = &NameFS.second;
393 }
394 return R;
395}
396
397#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
398LLVM_DUMP_METHOD void FunctionSamples::dump() const { print(dbgs(), 0); }
399#endif
400
401std::error_code ProfileSymbolList::read(const uint8_t *Data,
402 uint64_t ListSize) {
403 // Scan forward to see how many elements we expect.
404 reserve(Size: std::min<uint64_t>(a: ProfileSymbolListCutOff,
405 b: std::count(first: Data, last: Data + ListSize, value: 0)));
406
407 const char *ListStart = reinterpret_cast<const char *>(Data);
408 uint64_t Size = 0;
409 uint64_t StrNum = 0;
410 while (Size < ListSize && StrNum < ProfileSymbolListCutOff) {
411 StringRef Str(ListStart + Size);
412 add(Name: Str);
413 Size += Str.size() + 1;
414 StrNum++;
415 }
416 if (Size != ListSize && StrNum != ProfileSymbolListCutOff)
417 return sampleprof_error::malformed;
418 return sampleprof_error::success;
419}
420
421void SampleContextTrimmer::trimAndMergeColdContextProfiles(
422 uint64_t ColdCountThreshold, bool TrimColdContext, bool MergeColdContext,
423 uint32_t ColdContextFrameLength, bool TrimBaseProfileOnly) {
424 if (!TrimColdContext && !MergeColdContext)
425 return;
426
427 // Nothing to merge if sample threshold is zero
428 if (ColdCountThreshold == 0)
429 return;
430
431 // Trimming base profiles only is mainly to honor the preinliner decsion. When
432 // MergeColdContext is true preinliner decsion is not honored anyway so turn
433 // off TrimBaseProfileOnly.
434 if (MergeColdContext)
435 TrimBaseProfileOnly = false;
436
437 // Filter the cold profiles from ProfileMap and move them into a tmp
438 // container
439 std::vector<std::pair<hash_code, const FunctionSamples *>> ColdProfiles;
440 for (const auto &I : ProfileMap) {
441 const SampleContext &Context = I.second.getContext();
442 const FunctionSamples &FunctionProfile = I.second;
443 if (FunctionProfile.getTotalSamples() < ColdCountThreshold &&
444 (!TrimBaseProfileOnly || Context.isBaseContext()))
445 ColdProfiles.emplace_back(args: I.first, args: &I.second);
446 }
447
448 // Remove the cold profile from ProfileMap and merge them into
449 // MergedProfileMap by the last K frames of context
450 SampleProfileMap MergedProfileMap;
451 for (const auto &I : ColdProfiles) {
452 if (MergeColdContext) {
453 auto MergedContext = I.second->getContext().getContextFrames();
454 if (ColdContextFrameLength < MergedContext.size())
455 MergedContext = MergedContext.take_back(N: ColdContextFrameLength);
456 // Need to set MergedProfile's context here otherwise it will be lost.
457 FunctionSamples &MergedProfile = MergedProfileMap.create(Ctx: MergedContext);
458 MergedProfile.merge(Other: *I.second);
459 }
460 ProfileMap.erase(Key: I.first);
461 }
462
463 // Move the merged profiles into ProfileMap;
464 for (const auto &I : MergedProfileMap) {
465 // Filter the cold merged profile
466 if (TrimColdContext && I.second.getTotalSamples() < ColdCountThreshold &&
467 ProfileMap.find(Ctx: I.second.getContext()) == ProfileMap.end())
468 continue;
469 // Merge the profile if the original profile exists, otherwise just insert
470 // as a new profile. If inserted as a new profile from MergedProfileMap, it
471 // already has the right context.
472 auto Ret = ProfileMap.emplace(Args&: I.second.getContext(), Args: FunctionSamples());
473 FunctionSamples &OrigProfile = Ret.first->second;
474 OrigProfile.merge(Other: I.second);
475 }
476}
477
478std::error_code ProfileSymbolList::write(raw_ostream &OS) {
479 // Sort the symbols before output. If doing compression.
480 // It will make the compression much more effective.
481 std::vector<StringRef> SortedList(Syms.begin(), Syms.end());
482 llvm::sort(C&: SortedList);
483
484 std::string OutputString;
485 for (auto &Sym : SortedList) {
486 OutputString.append(str: Sym.str());
487 OutputString.append(n: 1, c: '\0');
488 }
489
490 OS << OutputString;
491 return sampleprof_error::success;
492}
493
494void ProfileSymbolList::dump(raw_ostream &OS) const {
495 OS << "======== Dump profile symbol list ========\n";
496 std::vector<StringRef> SortedList(Syms.begin(), Syms.end());
497 llvm::sort(C&: SortedList);
498
499 for (auto &Sym : SortedList)
500 OS << Sym << "\n";
501}
502
503ProfileConverter::FrameNode *
504ProfileConverter::FrameNode::getOrCreateChildFrame(const LineLocation &CallSite,
505 FunctionId CalleeName) {
506 uint64_t Hash = FunctionSamples::getCallSiteHash(Callee: CalleeName, Callsite: CallSite);
507 auto It = AllChildFrames.find(x: Hash);
508 if (It != AllChildFrames.end()) {
509 assert(It->second.FuncName == CalleeName &&
510 "Hash collision for child context node");
511 return &It->second;
512 }
513
514 AllChildFrames[Hash] = FrameNode(CalleeName, nullptr, CallSite);
515 return &AllChildFrames[Hash];
516}
517
518ProfileConverter::ProfileConverter(SampleProfileMap &Profiles)
519 : ProfileMap(Profiles) {
520 for (auto &FuncSample : Profiles) {
521 FunctionSamples *FSamples = &FuncSample.second;
522 auto *NewNode = getOrCreateContextPath(Context: FSamples->getContext());
523 assert(!NewNode->FuncSamples && "New node cannot have sample profile");
524 NewNode->FuncSamples = FSamples;
525 }
526}
527
528ProfileConverter::FrameNode *
529ProfileConverter::getOrCreateContextPath(const SampleContext &Context) {
530 auto Node = &RootFrame;
531 LineLocation CallSiteLoc(0, 0);
532 for (auto &Callsite : Context.getContextFrames()) {
533 Node = Node->getOrCreateChildFrame(CallSite: CallSiteLoc, CalleeName: Callsite.Func);
534 CallSiteLoc = Callsite.Location;
535 }
536 return Node;
537}
538
539void ProfileConverter::convertCSProfiles(ProfileConverter::FrameNode &Node) {
540 // Process each child profile. Add each child profile to callsite profile map
541 // of the current node `Node` if `Node` comes with a profile. Otherwise
542 // promote the child profile to a standalone profile.
543 auto *NodeProfile = Node.FuncSamples;
544 for (auto &It : Node.AllChildFrames) {
545 auto &ChildNode = It.second;
546 convertCSProfiles(Node&: ChildNode);
547 auto *ChildProfile = ChildNode.FuncSamples;
548 if (!ChildProfile)
549 continue;
550 SampleContext OrigChildContext = ChildProfile->getContext();
551 uint64_t OrigChildContextHash = OrigChildContext.getHashCode();
552 // Reset the child context to be contextless.
553 ChildProfile->getContext().setFunction(OrigChildContext.getFunction());
554 if (NodeProfile) {
555 // Add child profile to the callsite profile map.
556 auto &SamplesMap = NodeProfile->functionSamplesAt(Loc: ChildNode.CallSiteLoc);
557 SamplesMap.emplace(args: OrigChildContext.getFunction(), args&: *ChildProfile);
558 NodeProfile->addTotalSamples(Num: ChildProfile->getTotalSamples());
559 // Remove the corresponding body sample for the callsite and update the
560 // total weight.
561 auto Count = NodeProfile->removeCalledTargetAndBodySample(
562 LineOffset: ChildNode.CallSiteLoc.LineOffset, Discriminator: ChildNode.CallSiteLoc.Discriminator,
563 Func: OrigChildContext.getFunction());
564 NodeProfile->removeTotalSamples(Num: Count);
565 }
566
567 uint64_t NewChildProfileHash = 0;
568 // Separate child profile to be a standalone profile, if the current parent
569 // profile doesn't exist. This is a duplicating operation when the child
570 // profile is already incorporated into the parent which is still useful and
571 // thus done optionally. It is seen that duplicating context profiles into
572 // base profiles improves the code quality for thinlto build by allowing a
573 // profile in the prelink phase for to-be-fully-inlined functions.
574 if (!NodeProfile) {
575 ProfileMap[ChildProfile->getContext()].merge(Other: *ChildProfile);
576 NewChildProfileHash = ChildProfile->getContext().getHashCode();
577 } else if (GenerateMergedBaseProfiles) {
578 ProfileMap[ChildProfile->getContext()].merge(Other: *ChildProfile);
579 NewChildProfileHash = ChildProfile->getContext().getHashCode();
580 auto &SamplesMap = NodeProfile->functionSamplesAt(Loc: ChildNode.CallSiteLoc);
581 SamplesMap[ChildProfile->getFunction()].getContext().setAttribute(
582 ContextDuplicatedIntoBase);
583 }
584
585 // Remove the original child profile. Check if MD5 of new child profile
586 // collides with old profile, in this case the [] operator already
587 // overwritten it without the need of erase.
588 if (NewChildProfileHash != OrigChildContextHash)
589 ProfileMap.erase(Key: OrigChildContextHash);
590 }
591}
592
593void ProfileConverter::convertCSProfiles() { convertCSProfiles(Node&: RootFrame); }
594