1 //===- ModuleSummaryAnalysis.cpp - Module summary index builder -----------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This pass builds a ModuleSummaryIndex object for the module, to be written 11 // to bitcode or LLVM assembly. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #include "llvm/Analysis/ModuleSummaryAnalysis.h" 16 #include "llvm/ADT/ArrayRef.h" 17 #include "llvm/ADT/DenseSet.h" 18 #include "llvm/ADT/MapVector.h" 19 #include "llvm/ADT/STLExtras.h" 20 #include "llvm/ADT/SetVector.h" 21 #include "llvm/ADT/SmallPtrSet.h" 22 #include "llvm/ADT/SmallVector.h" 23 #include "llvm/ADT/StringRef.h" 24 #include "llvm/Analysis/BlockFrequencyInfo.h" 25 #include "llvm/Analysis/BranchProbabilityInfo.h" 26 #include "llvm/Analysis/IndirectCallPromotionAnalysis.h" 27 #include "llvm/Analysis/LoopInfo.h" 28 #include "llvm/Analysis/ProfileSummaryInfo.h" 29 #include "llvm/Analysis/TypeMetadataUtils.h" 30 #include "llvm/IR/Attributes.h" 31 #include "llvm/IR/BasicBlock.h" 32 #include "llvm/IR/CallSite.h" 33 #include "llvm/IR/Constant.h" 34 #include "llvm/IR/Constants.h" 35 #include "llvm/IR/Dominators.h" 36 #include "llvm/IR/Function.h" 37 #include "llvm/IR/GlobalAlias.h" 38 #include "llvm/IR/GlobalValue.h" 39 #include "llvm/IR/GlobalVariable.h" 40 #include "llvm/IR/Instructions.h" 41 #include "llvm/IR/IntrinsicInst.h" 42 #include "llvm/IR/Intrinsics.h" 43 #include "llvm/IR/Metadata.h" 44 #include "llvm/IR/Module.h" 45 #include "llvm/IR/ModuleSummaryIndex.h" 46 #include "llvm/IR/Use.h" 47 #include "llvm/IR/User.h" 48 #include "llvm/Object/ModuleSymbolTable.h" 49 #include "llvm/Object/SymbolicFile.h" 50 #include "llvm/Pass.h" 51 #include "llvm/Support/Casting.h" 52 #include <algorithm> 53 #include <cassert> 54 #include <cstdint> 55 #include <vector> 56 57 using namespace llvm; 58 59 #define DEBUG_TYPE "module-summary-analysis" 60 61 // Walk through the operands of a given User via worklist iteration and populate 62 // the set of GlobalValue references encountered. Invoked either on an 63 // Instruction or a GlobalVariable (which walks its initializer). 64 static void findRefEdges(ModuleSummaryIndex &Index, const User *CurUser, 65 SetVector<ValueInfo> &RefEdges, 66 SmallPtrSet<const User *, 8> &Visited) { 67 SmallVector<const User *, 32> Worklist; 68 Worklist.push_back(CurUser); 69 70 while (!Worklist.empty()) { 71 const User *U = Worklist.pop_back_val(); 72 73 if (!Visited.insert(U).second) 74 continue; 75 76 ImmutableCallSite CS(U); 77 78 for (const auto &OI : U->operands()) { 79 const User *Operand = dyn_cast<User>(OI); 80 if (!Operand) 81 continue; 82 if (isa<BlockAddress>(Operand)) 83 continue; 84 if (auto *GV = dyn_cast<GlobalValue>(Operand)) { 85 // We have a reference to a global value. This should be added to 86 // the reference set unless it is a callee. Callees are handled 87 // specially by WriteFunction and are added to a separate list. 88 if (!(CS && CS.isCallee(&OI))) 89 RefEdges.insert(Index.getOrInsertValueInfo(GV)); 90 continue; 91 } 92 Worklist.push_back(Operand); 93 } 94 } 95 } 96 97 static CalleeInfo::HotnessType getHotness(uint64_t ProfileCount, 98 ProfileSummaryInfo *PSI) { 99 if (!PSI) 100 return CalleeInfo::HotnessType::Unknown; 101 if (PSI->isHotCount(ProfileCount)) 102 return CalleeInfo::HotnessType::Hot; 103 if (PSI->isColdCount(ProfileCount)) 104 return CalleeInfo::HotnessType::Cold; 105 return CalleeInfo::HotnessType::None; 106 } 107 108 static bool isNonRenamableLocal(const GlobalValue &GV) { 109 return GV.hasSection() && GV.hasLocalLinkage(); 110 } 111 112 /// Determine whether this call has all constant integer arguments (excluding 113 /// "this") and summarize it to VCalls or ConstVCalls as appropriate. 114 static void addVCallToSet(DevirtCallSite Call, GlobalValue::GUID Guid, 115 SetVector<FunctionSummary::VFuncId> &VCalls, 116 SetVector<FunctionSummary::ConstVCall> &ConstVCalls) { 117 std::vector<uint64_t> Args; 118 // Start from the second argument to skip the "this" pointer. 119 for (auto &Arg : make_range(Call.CS.arg_begin() + 1, Call.CS.arg_end())) { 120 auto *CI = dyn_cast<ConstantInt>(Arg); 121 if (!CI || CI->getBitWidth() > 64) { 122 VCalls.insert({Guid, Call.Offset}); 123 return; 124 } 125 Args.push_back(CI->getZExtValue()); 126 } 127 ConstVCalls.insert({{Guid, Call.Offset}, std::move(Args)}); 128 } 129 130 /// If this intrinsic call requires that we add information to the function 131 /// summary, do so via the non-constant reference arguments. 132 static void addIntrinsicToSummary( 133 const CallInst *CI, SetVector<GlobalValue::GUID> &TypeTests, 134 SetVector<FunctionSummary::VFuncId> &TypeTestAssumeVCalls, 135 SetVector<FunctionSummary::VFuncId> &TypeCheckedLoadVCalls, 136 SetVector<FunctionSummary::ConstVCall> &TypeTestAssumeConstVCalls, 137 SetVector<FunctionSummary::ConstVCall> &TypeCheckedLoadConstVCalls) { 138 switch (CI->getCalledFunction()->getIntrinsicID()) { 139 case Intrinsic::type_test: { 140 auto *TypeMDVal = cast<MetadataAsValue>(CI->getArgOperand(1)); 141 auto *TypeId = dyn_cast<MDString>(TypeMDVal->getMetadata()); 142 if (!TypeId) 143 break; 144 GlobalValue::GUID Guid = GlobalValue::getGUID(TypeId->getString()); 145 146 // Produce a summary from type.test intrinsics. We only summarize type.test 147 // intrinsics that are used other than by an llvm.assume intrinsic. 148 // Intrinsics that are assumed are relevant only to the devirtualization 149 // pass, not the type test lowering pass. 150 bool HasNonAssumeUses = llvm::any_of(CI->uses(), [](const Use &CIU) { 151 auto *AssumeCI = dyn_cast<CallInst>(CIU.getUser()); 152 if (!AssumeCI) 153 return true; 154 Function *F = AssumeCI->getCalledFunction(); 155 return !F || F->getIntrinsicID() != Intrinsic::assume; 156 }); 157 if (HasNonAssumeUses) 158 TypeTests.insert(Guid); 159 160 SmallVector<DevirtCallSite, 4> DevirtCalls; 161 SmallVector<CallInst *, 4> Assumes; 162 findDevirtualizableCallsForTypeTest(DevirtCalls, Assumes, CI); 163 for (auto &Call : DevirtCalls) 164 addVCallToSet(Call, Guid, TypeTestAssumeVCalls, 165 TypeTestAssumeConstVCalls); 166 167 break; 168 } 169 170 case Intrinsic::type_checked_load: { 171 auto *TypeMDVal = cast<MetadataAsValue>(CI->getArgOperand(2)); 172 auto *TypeId = dyn_cast<MDString>(TypeMDVal->getMetadata()); 173 if (!TypeId) 174 break; 175 GlobalValue::GUID Guid = GlobalValue::getGUID(TypeId->getString()); 176 177 SmallVector<DevirtCallSite, 4> DevirtCalls; 178 SmallVector<Instruction *, 4> LoadedPtrs; 179 SmallVector<Instruction *, 4> Preds; 180 bool HasNonCallUses = false; 181 findDevirtualizableCallsForTypeCheckedLoad(DevirtCalls, LoadedPtrs, Preds, 182 HasNonCallUses, CI); 183 // Any non-call uses of the result of llvm.type.checked.load will 184 // prevent us from optimizing away the llvm.type.test. 185 if (HasNonCallUses) 186 TypeTests.insert(Guid); 187 for (auto &Call : DevirtCalls) 188 addVCallToSet(Call, Guid, TypeCheckedLoadVCalls, 189 TypeCheckedLoadConstVCalls); 190 191 break; 192 } 193 default: 194 break; 195 } 196 } 197 198 static void 199 computeFunctionSummary(ModuleSummaryIndex &Index, const Module &M, 200 const Function &F, BlockFrequencyInfo *BFI, 201 ProfileSummaryInfo *PSI, bool HasLocalsInUsedOrAsm, 202 DenseSet<GlobalValue::GUID> &CantBePromoted) { 203 // Summary not currently supported for anonymous functions, they should 204 // have been named. 205 assert(F.hasName()); 206 207 unsigned NumInsts = 0; 208 // Map from callee ValueId to profile count. Used to accumulate profile 209 // counts for all static calls to a given callee. 210 MapVector<ValueInfo, CalleeInfo> CallGraphEdges; 211 SetVector<ValueInfo> RefEdges; 212 SetVector<GlobalValue::GUID> TypeTests; 213 SetVector<FunctionSummary::VFuncId> TypeTestAssumeVCalls, 214 TypeCheckedLoadVCalls; 215 SetVector<FunctionSummary::ConstVCall> TypeTestAssumeConstVCalls, 216 TypeCheckedLoadConstVCalls; 217 ICallPromotionAnalysis ICallAnalysis; 218 SmallPtrSet<const User *, 8> Visited; 219 220 // Add personality function, prefix data and prologue data to function's ref 221 // list. 222 findRefEdges(Index, &F, RefEdges, Visited); 223 224 bool HasInlineAsmMaybeReferencingInternal = false; 225 for (const BasicBlock &BB : F) 226 for (const Instruction &I : BB) { 227 if (isa<DbgInfoIntrinsic>(I)) 228 continue; 229 ++NumInsts; 230 findRefEdges(Index, &I, RefEdges, Visited); 231 auto CS = ImmutableCallSite(&I); 232 if (!CS) 233 continue; 234 235 const auto *CI = dyn_cast<CallInst>(&I); 236 // Since we don't know exactly which local values are referenced in inline 237 // assembly, conservatively mark the function as possibly referencing 238 // a local value from inline assembly to ensure we don't export a 239 // reference (which would require renaming and promotion of the 240 // referenced value). 241 if (HasLocalsInUsedOrAsm && CI && CI->isInlineAsm()) 242 HasInlineAsmMaybeReferencingInternal = true; 243 244 auto *CalledValue = CS.getCalledValue(); 245 auto *CalledFunction = CS.getCalledFunction(); 246 if (CalledValue && !CalledFunction) { 247 CalledValue = CalledValue->stripPointerCastsNoFollowAliases(); 248 // Stripping pointer casts can reveal a called function. 249 CalledFunction = dyn_cast<Function>(CalledValue); 250 } 251 // Check if this is an alias to a function. If so, get the 252 // called aliasee for the checks below. 253 if (auto *GA = dyn_cast<GlobalAlias>(CalledValue)) { 254 assert(!CalledFunction && "Expected null called function in callsite for alias"); 255 CalledFunction = dyn_cast<Function>(GA->getBaseObject()); 256 } 257 // Check if this is a direct call to a known function or a known 258 // intrinsic, or an indirect call with profile data. 259 if (CalledFunction) { 260 if (CI && CalledFunction->isIntrinsic()) { 261 addIntrinsicToSummary( 262 CI, TypeTests, TypeTestAssumeVCalls, TypeCheckedLoadVCalls, 263 TypeTestAssumeConstVCalls, TypeCheckedLoadConstVCalls); 264 continue; 265 } 266 // We should have named any anonymous globals 267 assert(CalledFunction->hasName()); 268 auto ScaledCount = PSI->getProfileCount(&I, BFI); 269 auto Hotness = ScaledCount ? getHotness(ScaledCount.getValue(), PSI) 270 : CalleeInfo::HotnessType::Unknown; 271 272 // Use the original CalledValue, in case it was an alias. We want 273 // to record the call edge to the alias in that case. Eventually 274 // an alias summary will be created to associate the alias and 275 // aliasee. 276 auto &ValueInfo = CallGraphEdges[Index.getOrInsertValueInfo( 277 cast<GlobalValue>(CalledValue))]; 278 ValueInfo.updateHotness(Hotness); 279 // Add the relative block frequency to CalleeInfo if there is no profile 280 // information. 281 if (BFI != nullptr && Hotness == CalleeInfo::HotnessType::Unknown) { 282 uint64_t BBFreq = BFI->getBlockFreq(&BB).getFrequency(); 283 uint64_t EntryFreq = BFI->getEntryFreq(); 284 ValueInfo.updateRelBlockFreq(BBFreq, EntryFreq); 285 } 286 } else { 287 // Skip inline assembly calls. 288 if (CI && CI->isInlineAsm()) 289 continue; 290 // Skip direct calls. 291 if (!CalledValue || isa<Constant>(CalledValue)) 292 continue; 293 294 uint32_t NumVals, NumCandidates; 295 uint64_t TotalCount; 296 auto CandidateProfileData = 297 ICallAnalysis.getPromotionCandidatesForInstruction( 298 &I, NumVals, TotalCount, NumCandidates); 299 for (auto &Candidate : CandidateProfileData) 300 CallGraphEdges[Index.getOrInsertValueInfo(Candidate.Value)] 301 .updateHotness(getHotness(Candidate.Count, PSI)); 302 } 303 } 304 305 // Explicit add hot edges to enforce importing for designated GUIDs for 306 // sample PGO, to enable the same inlines as the profiled optimized binary. 307 for (auto &I : F.getImportGUIDs()) 308 CallGraphEdges[Index.getOrInsertValueInfo(I)].updateHotness( 309 CalleeInfo::HotnessType::Critical); 310 311 bool NonRenamableLocal = isNonRenamableLocal(F); 312 bool NotEligibleForImport = 313 NonRenamableLocal || HasInlineAsmMaybeReferencingInternal || 314 // Inliner doesn't handle variadic functions. 315 // FIXME: refactor this to use the same code that inliner is using. 316 F.isVarArg() || 317 // Don't try to import functions with noinline attribute. 318 F.getAttributes().hasFnAttribute(Attribute::NoInline); 319 GlobalValueSummary::GVFlags Flags(F.getLinkage(), NotEligibleForImport, 320 /* Live = */ false, F.isDSOLocal()); 321 FunctionSummary::FFlags FunFlags{ 322 F.hasFnAttribute(Attribute::ReadNone), 323 F.hasFnAttribute(Attribute::ReadOnly), 324 F.hasFnAttribute(Attribute::NoRecurse), 325 F.returnDoesNotAlias(), 326 }; 327 auto FuncSummary = llvm::make_unique<FunctionSummary>( 328 Flags, NumInsts, FunFlags, RefEdges.takeVector(), 329 CallGraphEdges.takeVector(), TypeTests.takeVector(), 330 TypeTestAssumeVCalls.takeVector(), TypeCheckedLoadVCalls.takeVector(), 331 TypeTestAssumeConstVCalls.takeVector(), 332 TypeCheckedLoadConstVCalls.takeVector()); 333 if (NonRenamableLocal) 334 CantBePromoted.insert(F.getGUID()); 335 Index.addGlobalValueSummary(F.getName(), std::move(FuncSummary)); 336 } 337 338 static void 339 computeVariableSummary(ModuleSummaryIndex &Index, const GlobalVariable &V, 340 DenseSet<GlobalValue::GUID> &CantBePromoted) { 341 SetVector<ValueInfo> RefEdges; 342 SmallPtrSet<const User *, 8> Visited; 343 findRefEdges(Index, &V, RefEdges, Visited); 344 bool NonRenamableLocal = isNonRenamableLocal(V); 345 GlobalValueSummary::GVFlags Flags(V.getLinkage(), NonRenamableLocal, 346 /* Live = */ false, V.isDSOLocal()); 347 auto GVarSummary = 348 llvm::make_unique<GlobalVarSummary>(Flags, RefEdges.takeVector()); 349 if (NonRenamableLocal) 350 CantBePromoted.insert(V.getGUID()); 351 Index.addGlobalValueSummary(V.getName(), std::move(GVarSummary)); 352 } 353 354 static void 355 computeAliasSummary(ModuleSummaryIndex &Index, const GlobalAlias &A, 356 DenseSet<GlobalValue::GUID> &CantBePromoted) { 357 bool NonRenamableLocal = isNonRenamableLocal(A); 358 GlobalValueSummary::GVFlags Flags(A.getLinkage(), NonRenamableLocal, 359 /* Live = */ false, A.isDSOLocal()); 360 auto AS = llvm::make_unique<AliasSummary>(Flags); 361 auto *Aliasee = A.getBaseObject(); 362 auto *AliaseeSummary = Index.getGlobalValueSummary(*Aliasee); 363 assert(AliaseeSummary && "Alias expects aliasee summary to be parsed"); 364 AS->setAliasee(AliaseeSummary); 365 if (NonRenamableLocal) 366 CantBePromoted.insert(A.getGUID()); 367 Index.addGlobalValueSummary(A.getName(), std::move(AS)); 368 } 369 370 // Set LiveRoot flag on entries matching the given value name. 371 static void setLiveRoot(ModuleSummaryIndex &Index, StringRef Name) { 372 if (ValueInfo VI = Index.getValueInfo(GlobalValue::getGUID(Name))) 373 for (auto &Summary : VI.getSummaryList()) 374 Summary->setLive(true); 375 } 376 377 ModuleSummaryIndex llvm::buildModuleSummaryIndex( 378 const Module &M, 379 std::function<BlockFrequencyInfo *(const Function &F)> GetBFICallback, 380 ProfileSummaryInfo *PSI) { 381 assert(PSI); 382 ModuleSummaryIndex Index(/*IsPerformingAnalysis=*/true); 383 384 // Identify the local values in the llvm.used and llvm.compiler.used sets, 385 // which should not be exported as they would then require renaming and 386 // promotion, but we may have opaque uses e.g. in inline asm. We collect them 387 // here because we use this information to mark functions containing inline 388 // assembly calls as not importable. 389 SmallPtrSet<GlobalValue *, 8> LocalsUsed; 390 SmallPtrSet<GlobalValue *, 8> Used; 391 // First collect those in the llvm.used set. 392 collectUsedGlobalVariables(M, Used, /*CompilerUsed*/ false); 393 // Next collect those in the llvm.compiler.used set. 394 collectUsedGlobalVariables(M, Used, /*CompilerUsed*/ true); 395 DenseSet<GlobalValue::GUID> CantBePromoted; 396 for (auto *V : Used) { 397 if (V->hasLocalLinkage()) { 398 LocalsUsed.insert(V); 399 CantBePromoted.insert(V->getGUID()); 400 } 401 } 402 403 bool HasLocalInlineAsmSymbol = false; 404 if (!M.getModuleInlineAsm().empty()) { 405 // Collect the local values defined by module level asm, and set up 406 // summaries for these symbols so that they can be marked as NoRename, 407 // to prevent export of any use of them in regular IR that would require 408 // renaming within the module level asm. Note we don't need to create a 409 // summary for weak or global defs, as they don't need to be flagged as 410 // NoRename, and defs in module level asm can't be imported anyway. 411 // Also, any values used but not defined within module level asm should 412 // be listed on the llvm.used or llvm.compiler.used global and marked as 413 // referenced from there. 414 ModuleSymbolTable::CollectAsmSymbols( 415 M, [&](StringRef Name, object::BasicSymbolRef::Flags Flags) { 416 // Symbols not marked as Weak or Global are local definitions. 417 if (Flags & (object::BasicSymbolRef::SF_Weak | 418 object::BasicSymbolRef::SF_Global)) 419 return; 420 HasLocalInlineAsmSymbol = true; 421 GlobalValue *GV = M.getNamedValue(Name); 422 if (!GV) 423 return; 424 assert(GV->isDeclaration() && "Def in module asm already has definition"); 425 GlobalValueSummary::GVFlags GVFlags(GlobalValue::InternalLinkage, 426 /* NotEligibleToImport = */ true, 427 /* Live = */ true, 428 /* Local */ GV->isDSOLocal()); 429 CantBePromoted.insert(GlobalValue::getGUID(Name)); 430 // Create the appropriate summary type. 431 if (Function *F = dyn_cast<Function>(GV)) { 432 std::unique_ptr<FunctionSummary> Summary = 433 llvm::make_unique<FunctionSummary>( 434 GVFlags, 0, 435 FunctionSummary::FFlags{ 436 F->hasFnAttribute(Attribute::ReadNone), 437 F->hasFnAttribute(Attribute::ReadOnly), 438 F->hasFnAttribute(Attribute::NoRecurse), 439 F->returnDoesNotAlias()}, 440 ArrayRef<ValueInfo>{}, ArrayRef<FunctionSummary::EdgeTy>{}, 441 ArrayRef<GlobalValue::GUID>{}, 442 ArrayRef<FunctionSummary::VFuncId>{}, 443 ArrayRef<FunctionSummary::VFuncId>{}, 444 ArrayRef<FunctionSummary::ConstVCall>{}, 445 ArrayRef<FunctionSummary::ConstVCall>{}); 446 Index.addGlobalValueSummary(Name, std::move(Summary)); 447 } else { 448 std::unique_ptr<GlobalVarSummary> Summary = 449 llvm::make_unique<GlobalVarSummary>(GVFlags, 450 ArrayRef<ValueInfo>{}); 451 Index.addGlobalValueSummary(Name, std::move(Summary)); 452 } 453 }); 454 } 455 456 // Compute summaries for all functions defined in module, and save in the 457 // index. 458 for (auto &F : M) { 459 if (F.isDeclaration()) 460 continue; 461 462 BlockFrequencyInfo *BFI = nullptr; 463 std::unique_ptr<BlockFrequencyInfo> BFIPtr; 464 if (GetBFICallback) 465 BFI = GetBFICallback(F); 466 else if (F.hasProfileData()) { 467 LoopInfo LI{DominatorTree(const_cast<Function &>(F))}; 468 BranchProbabilityInfo BPI{F, LI}; 469 BFIPtr = llvm::make_unique<BlockFrequencyInfo>(F, BPI, LI); 470 BFI = BFIPtr.get(); 471 } 472 473 computeFunctionSummary(Index, M, F, BFI, PSI, 474 !LocalsUsed.empty() || HasLocalInlineAsmSymbol, 475 CantBePromoted); 476 } 477 478 // Compute summaries for all variables defined in module, and save in the 479 // index. 480 for (const GlobalVariable &G : M.globals()) { 481 if (G.isDeclaration()) 482 continue; 483 computeVariableSummary(Index, G, CantBePromoted); 484 } 485 486 // Compute summaries for all aliases defined in module, and save in the 487 // index. 488 for (const GlobalAlias &A : M.aliases()) 489 computeAliasSummary(Index, A, CantBePromoted); 490 491 for (auto *V : LocalsUsed) { 492 auto *Summary = Index.getGlobalValueSummary(*V); 493 assert(Summary && "Missing summary for global value"); 494 Summary->setNotEligibleToImport(); 495 } 496 497 // The linker doesn't know about these LLVM produced values, so we need 498 // to flag them as live in the index to ensure index-based dead value 499 // analysis treats them as live roots of the analysis. 500 setLiveRoot(Index, "llvm.used"); 501 setLiveRoot(Index, "llvm.compiler.used"); 502 setLiveRoot(Index, "llvm.global_ctors"); 503 setLiveRoot(Index, "llvm.global_dtors"); 504 setLiveRoot(Index, "llvm.global.annotations"); 505 506 bool IsThinLTO = true; 507 if (auto *MD = 508 mdconst::extract_or_null<ConstantInt>(M.getModuleFlag("ThinLTO"))) 509 IsThinLTO = MD->getZExtValue(); 510 511 for (auto &GlobalList : Index) { 512 // Ignore entries for references that are undefined in the current module. 513 if (GlobalList.second.SummaryList.empty()) 514 continue; 515 516 assert(GlobalList.second.SummaryList.size() == 1 && 517 "Expected module's index to have one summary per GUID"); 518 auto &Summary = GlobalList.second.SummaryList[0]; 519 if (!IsThinLTO) { 520 Summary->setNotEligibleToImport(); 521 continue; 522 } 523 524 bool AllRefsCanBeExternallyReferenced = 525 llvm::all_of(Summary->refs(), [&](const ValueInfo &VI) { 526 return !CantBePromoted.count(VI.getGUID()); 527 }); 528 if (!AllRefsCanBeExternallyReferenced) { 529 Summary->setNotEligibleToImport(); 530 continue; 531 } 532 533 if (auto *FuncSummary = dyn_cast<FunctionSummary>(Summary.get())) { 534 bool AllCallsCanBeExternallyReferenced = llvm::all_of( 535 FuncSummary->calls(), [&](const FunctionSummary::EdgeTy &Edge) { 536 return !CantBePromoted.count(Edge.first.getGUID()); 537 }); 538 if (!AllCallsCanBeExternallyReferenced) 539 Summary->setNotEligibleToImport(); 540 } 541 } 542 543 return Index; 544 } 545 546 AnalysisKey ModuleSummaryIndexAnalysis::Key; 547 548 ModuleSummaryIndex 549 ModuleSummaryIndexAnalysis::run(Module &M, ModuleAnalysisManager &AM) { 550 ProfileSummaryInfo &PSI = AM.getResult<ProfileSummaryAnalysis>(M); 551 auto &FAM = AM.getResult<FunctionAnalysisManagerModuleProxy>(M).getManager(); 552 return buildModuleSummaryIndex( 553 M, 554 [&FAM](const Function &F) { 555 return &FAM.getResult<BlockFrequencyAnalysis>( 556 *const_cast<Function *>(&F)); 557 }, 558 &PSI); 559 } 560 561 char ModuleSummaryIndexWrapperPass::ID = 0; 562 563 INITIALIZE_PASS_BEGIN(ModuleSummaryIndexWrapperPass, "module-summary-analysis", 564 "Module Summary Analysis", false, true) 565 INITIALIZE_PASS_DEPENDENCY(BlockFrequencyInfoWrapperPass) 566 INITIALIZE_PASS_DEPENDENCY(ProfileSummaryInfoWrapperPass) 567 INITIALIZE_PASS_END(ModuleSummaryIndexWrapperPass, "module-summary-analysis", 568 "Module Summary Analysis", false, true) 569 570 ModulePass *llvm::createModuleSummaryIndexWrapperPass() { 571 return new ModuleSummaryIndexWrapperPass(); 572 } 573 574 ModuleSummaryIndexWrapperPass::ModuleSummaryIndexWrapperPass() 575 : ModulePass(ID) { 576 initializeModuleSummaryIndexWrapperPassPass(*PassRegistry::getPassRegistry()); 577 } 578 579 bool ModuleSummaryIndexWrapperPass::runOnModule(Module &M) { 580 auto &PSI = *getAnalysis<ProfileSummaryInfoWrapperPass>().getPSI(); 581 Index = buildModuleSummaryIndex( 582 M, 583 [this](const Function &F) { 584 return &(this->getAnalysis<BlockFrequencyInfoWrapperPass>( 585 *const_cast<Function *>(&F)) 586 .getBFI()); 587 }, 588 &PSI); 589 return false; 590 } 591 592 bool ModuleSummaryIndexWrapperPass::doFinalization(Module &M) { 593 Index.reset(); 594 return false; 595 } 596 597 void ModuleSummaryIndexWrapperPass::getAnalysisUsage(AnalysisUsage &AU) const { 598 AU.setPreservesAll(); 599 AU.addRequired<BlockFrequencyInfoWrapperPass>(); 600 AU.addRequired<ProfileSummaryInfoWrapperPass>(); 601 } 602