1 //===-- Verifier.cpp - Implement the Module Verifier -----------------------==//
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 // This file defines the function verifier interface, that can be used for some
11 // sanity checking of input to the system.
13 // Note that this does not provide full `Java style' security and verifications,
14 // instead it just tries to ensure that code is well-formed.
16 // * Both of a binary operator's parameters are of the same type
17 // * Verify that the indices of mem access instructions match other operands
18 // * Verify that arithmetic and other things are only performed on first-class
19 // types. Verify that shifts & logicals only happen on integrals f.e.
20 // * All of the constants in a switch statement are of the correct type
21 // * The code is in valid SSA form
22 // * It should be illegal to put a label into any other type (like a structure)
23 // or to return one. [except constant arrays!]
24 // * Only phi nodes can be self referential: 'add i32 %0, %0 ; <int>:0' is bad
25 // * PHI nodes must have an entry for each predecessor, with no extras.
26 // * PHI nodes must be the first thing in a basic block, all grouped together
27 // * PHI nodes must have at least one entry
28 // * All basic blocks should only end with terminator insts, not contain them
29 // * The entry node to a function must not have predecessors
30 // * All Instructions must be embedded into a basic block
31 // * Functions cannot take a void-typed parameter
32 // * Verify that a function's argument list agrees with it's declared type.
33 // * It is illegal to specify a name for a void value.
34 // * It is illegal to have a internal global value with no initializer
35 // * It is illegal to have a ret instruction that returns a value that does not
36 // agree with the function return value type.
37 // * Function call argument types match the function prototype
38 // * A landing pad is defined by a landingpad instruction, and can be jumped to
39 // only by the unwind edge of an invoke instruction.
40 // * A landingpad instruction must be the first non-PHI instruction in the
42 // * Landingpad instructions must be in a function with a personality function.
43 // * All other things that are tested by asserts spread about the code...
45 //===----------------------------------------------------------------------===//
47 #include "llvm/IR/Verifier.h"
48 #include "llvm/ADT/STLExtras.h"
49 #include "llvm/ADT/SetVector.h"
50 #include "llvm/ADT/SmallPtrSet.h"
51 #include "llvm/ADT/SmallVector.h"
52 #include "llvm/ADT/StringExtras.h"
53 #include "llvm/IR/CFG.h"
54 #include "llvm/IR/CallSite.h"
55 #include "llvm/IR/CallingConv.h"
56 #include "llvm/IR/ConstantRange.h"
57 #include "llvm/IR/Constants.h"
58 #include "llvm/IR/DataLayout.h"
59 #include "llvm/IR/DebugInfo.h"
60 #include "llvm/IR/DerivedTypes.h"
61 #include "llvm/IR/Dominators.h"
62 #include "llvm/IR/InlineAsm.h"
63 #include "llvm/IR/InstIterator.h"
64 #include "llvm/IR/InstVisitor.h"
65 #include "llvm/IR/IntrinsicInst.h"
66 #include "llvm/IR/LLVMContext.h"
67 #include "llvm/IR/Metadata.h"
68 #include "llvm/IR/Module.h"
69 #include "llvm/IR/PassManager.h"
70 #include "llvm/IR/Statepoint.h"
71 #include "llvm/Pass.h"
72 #include "llvm/Support/CommandLine.h"
73 #include "llvm/Support/Debug.h"
74 #include "llvm/Support/ErrorHandling.h"
75 #include "llvm/Support/raw_ostream.h"
80 static cl::opt<bool> VerifyDebugInfo("verify-debug-info", cl::init(true));
83 struct VerifierSupport {
87 /// \brief Track the brokenness of the module while recursively visiting.
90 explicit VerifierSupport(raw_ostream &OS)
91 : OS(OS), M(nullptr), Broken(false) {}
94 template <class NodeTy> void Write(const ilist_iterator<NodeTy> &I) {
98 void Write(const Module *M) {
101 OS << "; ModuleID = '" << M->getModuleIdentifier() << "'\n";
104 void Write(const Value *V) {
107 if (isa<Instruction>(V)) {
110 V->printAsOperand(OS, true, M);
114 void Write(ImmutableCallSite CS) {
115 Write(CS.getInstruction());
118 void Write(const Metadata *MD) {
125 template <class T> void Write(const MDTupleTypedArrayWrapper<T> &MD) {
129 void Write(const NamedMDNode *NMD) {
136 void Write(Type *T) {
142 void Write(const Comdat *C) {
148 template <typename T1, typename... Ts>
149 void WriteTs(const T1 &V1, const Ts &... Vs) {
154 template <typename... Ts> void WriteTs() {}
157 /// \brief A check failed, so printout out the condition and the message.
159 /// This provides a nice place to put a breakpoint if you want to see why
160 /// something is not correct.
161 void CheckFailed(const Twine &Message) {
162 OS << Message << '\n';
166 /// \brief A check failed (with values to print).
168 /// This calls the Message-only version so that the above is easier to set a
170 template <typename T1, typename... Ts>
171 void CheckFailed(const Twine &Message, const T1 &V1, const Ts &... Vs) {
172 CheckFailed(Message);
177 class Verifier : public InstVisitor<Verifier>, VerifierSupport {
178 friend class InstVisitor<Verifier>;
180 LLVMContext *Context;
183 /// \brief When verifying a basic block, keep track of all of the
184 /// instructions we have seen so far.
186 /// This allows us to do efficient dominance checks for the case when an
187 /// instruction has an operand that is an instruction in the same block.
188 SmallPtrSet<Instruction *, 16> InstsInThisBlock;
190 /// \brief Keep track of the metadata nodes that have been checked already.
191 SmallPtrSet<const Metadata *, 32> MDNodes;
193 /// \brief Track unresolved string-based type references.
194 SmallDenseMap<const MDString *, const MDNode *, 32> UnresolvedTypeRefs;
196 /// \brief The result type for a landingpad.
197 Type *LandingPadResultTy;
199 /// \brief Whether we've seen a call to @llvm.localescape in this function
203 /// Stores the count of how many objects were passed to llvm.localescape for a
204 /// given function and the largest index passed to llvm.localrecover.
205 DenseMap<Function *, std::pair<unsigned, unsigned>> FrameEscapeInfo;
207 /// Cache of constants visited in search of ConstantExprs.
208 SmallPtrSet<const Constant *, 32> ConstantExprVisited;
211 explicit Verifier(raw_ostream &OS)
212 : VerifierSupport(OS), Context(nullptr), LandingPadResultTy(nullptr),
213 SawFrameEscape(false) {}
215 bool verify(const Function &F) {
217 Context = &M->getContext();
219 // First ensure the function is well-enough formed to compute dominance
222 OS << "Function '" << F.getName()
223 << "' does not contain an entry block!\n";
226 for (Function::const_iterator I = F.begin(), E = F.end(); I != E; ++I) {
227 if (I->empty() || !I->back().isTerminator()) {
228 OS << "Basic Block in function '" << F.getName()
229 << "' does not have terminator!\n";
230 I->printAsOperand(OS, true);
236 // Now directly compute a dominance tree. We don't rely on the pass
237 // manager to provide this as it isolates us from a potentially
238 // out-of-date dominator tree and makes it significantly more complex to
239 // run this code outside of a pass manager.
240 // FIXME: It's really gross that we have to cast away constness here.
241 DT.recalculate(const_cast<Function &>(F));
244 // FIXME: We strip const here because the inst visitor strips const.
245 visit(const_cast<Function &>(F));
246 InstsInThisBlock.clear();
247 LandingPadResultTy = nullptr;
248 SawFrameEscape = false;
253 bool verify(const Module &M) {
255 Context = &M.getContext();
258 // Scan through, checking all of the external function's linkage now...
259 for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) {
260 visitGlobalValue(*I);
262 // Check to make sure function prototypes are okay.
263 if (I->isDeclaration())
267 // Now that we've visited every function, verify that we never asked to
268 // recover a frame index that wasn't escaped.
269 verifyFrameRecoverIndices();
271 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
273 visitGlobalVariable(*I);
275 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
277 visitGlobalAlias(*I);
279 for (Module::const_named_metadata_iterator I = M.named_metadata_begin(),
280 E = M.named_metadata_end();
282 visitNamedMDNode(*I);
284 for (const StringMapEntry<Comdat> &SMEC : M.getComdatSymbolTable())
285 visitComdat(SMEC.getValue());
288 visitModuleIdents(M);
290 // Verify type referneces last.
297 // Verification methods...
298 void visitGlobalValue(const GlobalValue &GV);
299 void visitGlobalVariable(const GlobalVariable &GV);
300 void visitGlobalAlias(const GlobalAlias &GA);
301 void visitAliaseeSubExpr(const GlobalAlias &A, const Constant &C);
302 void visitAliaseeSubExpr(SmallPtrSetImpl<const GlobalAlias *> &Visited,
303 const GlobalAlias &A, const Constant &C);
304 void visitNamedMDNode(const NamedMDNode &NMD);
305 void visitMDNode(const MDNode &MD);
306 void visitMetadataAsValue(const MetadataAsValue &MD, Function *F);
307 void visitValueAsMetadata(const ValueAsMetadata &MD, Function *F);
308 void visitComdat(const Comdat &C);
309 void visitModuleIdents(const Module &M);
310 void visitModuleFlags(const Module &M);
311 void visitModuleFlag(const MDNode *Op,
312 DenseMap<const MDString *, const MDNode *> &SeenIDs,
313 SmallVectorImpl<const MDNode *> &Requirements);
314 void visitFunction(const Function &F);
315 void visitBasicBlock(BasicBlock &BB);
316 void visitRangeMetadata(Instruction& I, MDNode* Range, Type* Ty);
317 void visitDereferenceableMetadata(Instruction& I, MDNode* MD);
319 template <class Ty> bool isValidMetadataArray(const MDTuple &N);
320 #define HANDLE_SPECIALIZED_MDNODE_LEAF(CLASS) void visit##CLASS(const CLASS &N);
321 #include "llvm/IR/Metadata.def"
322 void visitDIScope(const DIScope &N);
323 void visitDIVariable(const DIVariable &N);
324 void visitDILexicalBlockBase(const DILexicalBlockBase &N);
325 void visitDITemplateParameter(const DITemplateParameter &N);
327 void visitTemplateParams(const MDNode &N, const Metadata &RawParams);
329 /// \brief Check for a valid string-based type reference.
331 /// Checks if \c MD is a string-based type reference. If it is, keeps track
332 /// of it (and its user, \c N) for error messages later.
333 bool isValidUUID(const MDNode &N, const Metadata *MD);
335 /// \brief Check for a valid type reference.
337 /// Checks for subclasses of \a DIType, or \a isValidUUID().
338 bool isTypeRef(const MDNode &N, const Metadata *MD);
340 /// \brief Check for a valid scope reference.
342 /// Checks for subclasses of \a DIScope, or \a isValidUUID().
343 bool isScopeRef(const MDNode &N, const Metadata *MD);
345 /// \brief Check for a valid debug info reference.
347 /// Checks for subclasses of \a DINode, or \a isValidUUID().
348 bool isDIRef(const MDNode &N, const Metadata *MD);
350 // InstVisitor overrides...
351 using InstVisitor<Verifier>::visit;
352 void visit(Instruction &I);
354 void visitTruncInst(TruncInst &I);
355 void visitZExtInst(ZExtInst &I);
356 void visitSExtInst(SExtInst &I);
357 void visitFPTruncInst(FPTruncInst &I);
358 void visitFPExtInst(FPExtInst &I);
359 void visitFPToUIInst(FPToUIInst &I);
360 void visitFPToSIInst(FPToSIInst &I);
361 void visitUIToFPInst(UIToFPInst &I);
362 void visitSIToFPInst(SIToFPInst &I);
363 void visitIntToPtrInst(IntToPtrInst &I);
364 void visitPtrToIntInst(PtrToIntInst &I);
365 void visitBitCastInst(BitCastInst &I);
366 void visitAddrSpaceCastInst(AddrSpaceCastInst &I);
367 void visitPHINode(PHINode &PN);
368 void visitBinaryOperator(BinaryOperator &B);
369 void visitICmpInst(ICmpInst &IC);
370 void visitFCmpInst(FCmpInst &FC);
371 void visitExtractElementInst(ExtractElementInst &EI);
372 void visitInsertElementInst(InsertElementInst &EI);
373 void visitShuffleVectorInst(ShuffleVectorInst &EI);
374 void visitVAArgInst(VAArgInst &VAA) { visitInstruction(VAA); }
375 void visitCallInst(CallInst &CI);
376 void visitInvokeInst(InvokeInst &II);
377 void visitGetElementPtrInst(GetElementPtrInst &GEP);
378 void visitLoadInst(LoadInst &LI);
379 void visitStoreInst(StoreInst &SI);
380 void verifyDominatesUse(Instruction &I, unsigned i);
381 void visitInstruction(Instruction &I);
382 void visitTerminatorInst(TerminatorInst &I);
383 void visitBranchInst(BranchInst &BI);
384 void visitReturnInst(ReturnInst &RI);
385 void visitSwitchInst(SwitchInst &SI);
386 void visitIndirectBrInst(IndirectBrInst &BI);
387 void visitSelectInst(SelectInst &SI);
388 void visitUserOp1(Instruction &I);
389 void visitUserOp2(Instruction &I) { visitUserOp1(I); }
390 void visitIntrinsicCallSite(Intrinsic::ID ID, CallSite CS);
391 template <class DbgIntrinsicTy>
392 void visitDbgIntrinsic(StringRef Kind, DbgIntrinsicTy &DII);
393 void visitAtomicCmpXchgInst(AtomicCmpXchgInst &CXI);
394 void visitAtomicRMWInst(AtomicRMWInst &RMWI);
395 void visitFenceInst(FenceInst &FI);
396 void visitAllocaInst(AllocaInst &AI);
397 void visitExtractValueInst(ExtractValueInst &EVI);
398 void visitInsertValueInst(InsertValueInst &IVI);
399 void visitEHPadPredecessors(Instruction &I);
400 void visitLandingPadInst(LandingPadInst &LPI);
401 void visitCatchPadInst(CatchPadInst &CPI);
402 void visitCatchReturnInst(CatchReturnInst &CatchReturn);
403 void visitCleanupPadInst(CleanupPadInst &CPI);
404 void visitCatchSwitchInst(CatchSwitchInst &CatchSwitch);
405 void visitCleanupReturnInst(CleanupReturnInst &CRI);
407 void VerifyCallSite(CallSite CS);
408 void verifyMustTailCall(CallInst &CI);
409 bool PerformTypeCheck(Intrinsic::ID ID, Function *F, Type *Ty, int VT,
410 unsigned ArgNo, std::string &Suffix);
411 bool VerifyIntrinsicType(Type *Ty, ArrayRef<Intrinsic::IITDescriptor> &Infos,
412 SmallVectorImpl<Type *> &ArgTys);
413 bool VerifyIntrinsicIsVarArg(bool isVarArg,
414 ArrayRef<Intrinsic::IITDescriptor> &Infos);
415 bool VerifyAttributeCount(AttributeSet Attrs, unsigned Params);
416 void VerifyAttributeTypes(AttributeSet Attrs, unsigned Idx, bool isFunction,
418 void VerifyParameterAttrs(AttributeSet Attrs, unsigned Idx, Type *Ty,
419 bool isReturnValue, const Value *V);
420 void VerifyFunctionAttrs(FunctionType *FT, AttributeSet Attrs,
422 void VerifyFunctionMetadata(
423 const SmallVector<std::pair<unsigned, MDNode *>, 4> MDs);
425 void visitConstantExprsRecursively(const Constant *EntryC);
426 void visitConstantExpr(const ConstantExpr *CE);
427 void VerifyStatepoint(ImmutableCallSite CS);
428 void verifyFrameRecoverIndices();
430 // Module-level debug info verification...
431 void verifyTypeRefs();
432 template <class MapTy>
433 void verifyBitPieceExpression(const DbgInfoIntrinsic &I,
434 const MapTy &TypeRefs);
435 void visitUnresolvedTypeRef(const MDString *S, const MDNode *N);
437 } // End anonymous namespace
439 // Assert - We know that cond should be true, if not print an error message.
440 #define Assert(C, ...) \
441 do { if (!(C)) { CheckFailed(__VA_ARGS__); return; } } while (0)
443 void Verifier::visit(Instruction &I) {
444 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
445 Assert(I.getOperand(i) != nullptr, "Operand is null", &I);
446 InstVisitor<Verifier>::visit(I);
450 void Verifier::visitGlobalValue(const GlobalValue &GV) {
451 Assert(!GV.isDeclaration() || GV.hasExternalLinkage() ||
452 GV.hasExternalWeakLinkage(),
453 "Global is external, but doesn't have external or weak linkage!", &GV);
455 Assert(GV.getAlignment() <= Value::MaximumAlignment,
456 "huge alignment values are unsupported", &GV);
457 Assert(!GV.hasAppendingLinkage() || isa<GlobalVariable>(GV),
458 "Only global variables can have appending linkage!", &GV);
460 if (GV.hasAppendingLinkage()) {
461 const GlobalVariable *GVar = dyn_cast<GlobalVariable>(&GV);
462 Assert(GVar && GVar->getValueType()->isArrayTy(),
463 "Only global arrays can have appending linkage!", GVar);
466 if (GV.isDeclarationForLinker())
467 Assert(!GV.hasComdat(), "Declaration may not be in a Comdat!", &GV);
470 void Verifier::visitGlobalVariable(const GlobalVariable &GV) {
471 if (GV.hasInitializer()) {
472 Assert(GV.getInitializer()->getType() == GV.getType()->getElementType(),
473 "Global variable initializer type does not match global "
477 // If the global has common linkage, it must have a zero initializer and
478 // cannot be constant.
479 if (GV.hasCommonLinkage()) {
480 Assert(GV.getInitializer()->isNullValue(),
481 "'common' global must have a zero initializer!", &GV);
482 Assert(!GV.isConstant(), "'common' global may not be marked constant!",
484 Assert(!GV.hasComdat(), "'common' global may not be in a Comdat!", &GV);
487 Assert(GV.hasExternalLinkage() || GV.hasExternalWeakLinkage(),
488 "invalid linkage type for global declaration", &GV);
491 if (GV.hasName() && (GV.getName() == "llvm.global_ctors" ||
492 GV.getName() == "llvm.global_dtors")) {
493 Assert(!GV.hasInitializer() || GV.hasAppendingLinkage(),
494 "invalid linkage for intrinsic global variable", &GV);
495 // Don't worry about emitting an error for it not being an array,
496 // visitGlobalValue will complain on appending non-array.
497 if (ArrayType *ATy = dyn_cast<ArrayType>(GV.getValueType())) {
498 StructType *STy = dyn_cast<StructType>(ATy->getElementType());
499 PointerType *FuncPtrTy =
500 FunctionType::get(Type::getVoidTy(*Context), false)->getPointerTo();
501 // FIXME: Reject the 2-field form in LLVM 4.0.
503 (STy->getNumElements() == 2 || STy->getNumElements() == 3) &&
504 STy->getTypeAtIndex(0u)->isIntegerTy(32) &&
505 STy->getTypeAtIndex(1) == FuncPtrTy,
506 "wrong type for intrinsic global variable", &GV);
507 if (STy->getNumElements() == 3) {
508 Type *ETy = STy->getTypeAtIndex(2);
509 Assert(ETy->isPointerTy() &&
510 cast<PointerType>(ETy)->getElementType()->isIntegerTy(8),
511 "wrong type for intrinsic global variable", &GV);
516 if (GV.hasName() && (GV.getName() == "llvm.used" ||
517 GV.getName() == "llvm.compiler.used")) {
518 Assert(!GV.hasInitializer() || GV.hasAppendingLinkage(),
519 "invalid linkage for intrinsic global variable", &GV);
520 Type *GVType = GV.getValueType();
521 if (ArrayType *ATy = dyn_cast<ArrayType>(GVType)) {
522 PointerType *PTy = dyn_cast<PointerType>(ATy->getElementType());
523 Assert(PTy, "wrong type for intrinsic global variable", &GV);
524 if (GV.hasInitializer()) {
525 const Constant *Init = GV.getInitializer();
526 const ConstantArray *InitArray = dyn_cast<ConstantArray>(Init);
527 Assert(InitArray, "wrong initalizer for intrinsic global variable",
529 for (unsigned i = 0, e = InitArray->getNumOperands(); i != e; ++i) {
530 Value *V = Init->getOperand(i)->stripPointerCastsNoFollowAliases();
531 Assert(isa<GlobalVariable>(V) || isa<Function>(V) ||
533 "invalid llvm.used member", V);
534 Assert(V->hasName(), "members of llvm.used must be named", V);
540 Assert(!GV.hasDLLImportStorageClass() ||
541 (GV.isDeclaration() && GV.hasExternalLinkage()) ||
542 GV.hasAvailableExternallyLinkage(),
543 "Global is marked as dllimport, but not external", &GV);
545 if (!GV.hasInitializer()) {
546 visitGlobalValue(GV);
550 // Walk any aggregate initializers looking for bitcasts between address spaces
551 visitConstantExprsRecursively(GV.getInitializer());
553 visitGlobalValue(GV);
556 void Verifier::visitAliaseeSubExpr(const GlobalAlias &GA, const Constant &C) {
557 SmallPtrSet<const GlobalAlias*, 4> Visited;
559 visitAliaseeSubExpr(Visited, GA, C);
562 void Verifier::visitAliaseeSubExpr(SmallPtrSetImpl<const GlobalAlias*> &Visited,
563 const GlobalAlias &GA, const Constant &C) {
564 if (const auto *GV = dyn_cast<GlobalValue>(&C)) {
565 Assert(!GV->isDeclarationForLinker(), "Alias must point to a definition",
568 if (const auto *GA2 = dyn_cast<GlobalAlias>(GV)) {
569 Assert(Visited.insert(GA2).second, "Aliases cannot form a cycle", &GA);
571 Assert(!GA2->mayBeOverridden(), "Alias cannot point to a weak alias",
574 // Only continue verifying subexpressions of GlobalAliases.
575 // Do not recurse into global initializers.
580 if (const auto *CE = dyn_cast<ConstantExpr>(&C))
581 visitConstantExprsRecursively(CE);
583 for (const Use &U : C.operands()) {
585 if (const auto *GA2 = dyn_cast<GlobalAlias>(V))
586 visitAliaseeSubExpr(Visited, GA, *GA2->getAliasee());
587 else if (const auto *C2 = dyn_cast<Constant>(V))
588 visitAliaseeSubExpr(Visited, GA, *C2);
592 void Verifier::visitGlobalAlias(const GlobalAlias &GA) {
593 Assert(GlobalAlias::isValidLinkage(GA.getLinkage()),
594 "Alias should have private, internal, linkonce, weak, linkonce_odr, "
595 "weak_odr, or external linkage!",
597 const Constant *Aliasee = GA.getAliasee();
598 Assert(Aliasee, "Aliasee cannot be NULL!", &GA);
599 Assert(GA.getType() == Aliasee->getType(),
600 "Alias and aliasee types should match!", &GA);
602 Assert(isa<GlobalValue>(Aliasee) || isa<ConstantExpr>(Aliasee),
603 "Aliasee should be either GlobalValue or ConstantExpr", &GA);
605 visitAliaseeSubExpr(GA, *Aliasee);
607 visitGlobalValue(GA);
610 void Verifier::visitNamedMDNode(const NamedMDNode &NMD) {
611 for (unsigned i = 0, e = NMD.getNumOperands(); i != e; ++i) {
612 MDNode *MD = NMD.getOperand(i);
614 if (NMD.getName() == "llvm.dbg.cu") {
615 Assert(MD && isa<DICompileUnit>(MD), "invalid compile unit", &NMD, MD);
625 void Verifier::visitMDNode(const MDNode &MD) {
626 // Only visit each node once. Metadata can be mutually recursive, so this
627 // avoids infinite recursion here, as well as being an optimization.
628 if (!MDNodes.insert(&MD).second)
631 switch (MD.getMetadataID()) {
633 llvm_unreachable("Invalid MDNode subclass");
634 case Metadata::MDTupleKind:
636 #define HANDLE_SPECIALIZED_MDNODE_LEAF(CLASS) \
637 case Metadata::CLASS##Kind: \
638 visit##CLASS(cast<CLASS>(MD)); \
640 #include "llvm/IR/Metadata.def"
643 for (unsigned i = 0, e = MD.getNumOperands(); i != e; ++i) {
644 Metadata *Op = MD.getOperand(i);
647 Assert(!isa<LocalAsMetadata>(Op), "Invalid operand for global metadata!",
649 if (auto *N = dyn_cast<MDNode>(Op)) {
653 if (auto *V = dyn_cast<ValueAsMetadata>(Op)) {
654 visitValueAsMetadata(*V, nullptr);
659 // Check these last, so we diagnose problems in operands first.
660 Assert(!MD.isTemporary(), "Expected no forward declarations!", &MD);
661 Assert(MD.isResolved(), "All nodes should be resolved!", &MD);
664 void Verifier::visitValueAsMetadata(const ValueAsMetadata &MD, Function *F) {
665 Assert(MD.getValue(), "Expected valid value", &MD);
666 Assert(!MD.getValue()->getType()->isMetadataTy(),
667 "Unexpected metadata round-trip through values", &MD, MD.getValue());
669 auto *L = dyn_cast<LocalAsMetadata>(&MD);
673 Assert(F, "function-local metadata used outside a function", L);
675 // If this was an instruction, bb, or argument, verify that it is in the
676 // function that we expect.
677 Function *ActualF = nullptr;
678 if (Instruction *I = dyn_cast<Instruction>(L->getValue())) {
679 Assert(I->getParent(), "function-local metadata not in basic block", L, I);
680 ActualF = I->getParent()->getParent();
681 } else if (BasicBlock *BB = dyn_cast<BasicBlock>(L->getValue()))
682 ActualF = BB->getParent();
683 else if (Argument *A = dyn_cast<Argument>(L->getValue()))
684 ActualF = A->getParent();
685 assert(ActualF && "Unimplemented function local metadata case!");
687 Assert(ActualF == F, "function-local metadata used in wrong function", L);
690 void Verifier::visitMetadataAsValue(const MetadataAsValue &MDV, Function *F) {
691 Metadata *MD = MDV.getMetadata();
692 if (auto *N = dyn_cast<MDNode>(MD)) {
697 // Only visit each node once. Metadata can be mutually recursive, so this
698 // avoids infinite recursion here, as well as being an optimization.
699 if (!MDNodes.insert(MD).second)
702 if (auto *V = dyn_cast<ValueAsMetadata>(MD))
703 visitValueAsMetadata(*V, F);
706 bool Verifier::isValidUUID(const MDNode &N, const Metadata *MD) {
707 auto *S = dyn_cast<MDString>(MD);
710 if (S->getString().empty())
713 // Keep track of names of types referenced via UUID so we can check that they
715 UnresolvedTypeRefs.insert(std::make_pair(S, &N));
719 /// \brief Check if a value can be a reference to a type.
720 bool Verifier::isTypeRef(const MDNode &N, const Metadata *MD) {
721 return !MD || isValidUUID(N, MD) || isa<DIType>(MD);
724 /// \brief Check if a value can be a ScopeRef.
725 bool Verifier::isScopeRef(const MDNode &N, const Metadata *MD) {
726 return !MD || isValidUUID(N, MD) || isa<DIScope>(MD);
729 /// \brief Check if a value can be a debug info ref.
730 bool Verifier::isDIRef(const MDNode &N, const Metadata *MD) {
731 return !MD || isValidUUID(N, MD) || isa<DINode>(MD);
735 bool isValidMetadataArrayImpl(const MDTuple &N, bool AllowNull) {
736 for (Metadata *MD : N.operands()) {
749 bool isValidMetadataArray(const MDTuple &N) {
750 return isValidMetadataArrayImpl<Ty>(N, /* AllowNull */ false);
754 bool isValidMetadataNullArray(const MDTuple &N) {
755 return isValidMetadataArrayImpl<Ty>(N, /* AllowNull */ true);
758 void Verifier::visitDILocation(const DILocation &N) {
759 Assert(N.getRawScope() && isa<DILocalScope>(N.getRawScope()),
760 "location requires a valid scope", &N, N.getRawScope());
761 if (auto *IA = N.getRawInlinedAt())
762 Assert(isa<DILocation>(IA), "inlined-at should be a location", &N, IA);
765 void Verifier::visitGenericDINode(const GenericDINode &N) {
766 Assert(N.getTag(), "invalid tag", &N);
769 void Verifier::visitDIScope(const DIScope &N) {
770 if (auto *F = N.getRawFile())
771 Assert(isa<DIFile>(F), "invalid file", &N, F);
774 void Verifier::visitDISubrange(const DISubrange &N) {
775 Assert(N.getTag() == dwarf::DW_TAG_subrange_type, "invalid tag", &N);
776 Assert(N.getCount() >= -1, "invalid subrange count", &N);
779 void Verifier::visitDIEnumerator(const DIEnumerator &N) {
780 Assert(N.getTag() == dwarf::DW_TAG_enumerator, "invalid tag", &N);
783 void Verifier::visitDIBasicType(const DIBasicType &N) {
784 Assert(N.getTag() == dwarf::DW_TAG_base_type ||
785 N.getTag() == dwarf::DW_TAG_unspecified_type,
789 void Verifier::visitDIDerivedType(const DIDerivedType &N) {
790 // Common scope checks.
793 Assert(N.getTag() == dwarf::DW_TAG_typedef ||
794 N.getTag() == dwarf::DW_TAG_pointer_type ||
795 N.getTag() == dwarf::DW_TAG_ptr_to_member_type ||
796 N.getTag() == dwarf::DW_TAG_reference_type ||
797 N.getTag() == dwarf::DW_TAG_rvalue_reference_type ||
798 N.getTag() == dwarf::DW_TAG_const_type ||
799 N.getTag() == dwarf::DW_TAG_volatile_type ||
800 N.getTag() == dwarf::DW_TAG_restrict_type ||
801 N.getTag() == dwarf::DW_TAG_member ||
802 N.getTag() == dwarf::DW_TAG_inheritance ||
803 N.getTag() == dwarf::DW_TAG_friend,
805 if (N.getTag() == dwarf::DW_TAG_ptr_to_member_type) {
806 Assert(isTypeRef(N, N.getExtraData()), "invalid pointer to member type", &N,
810 Assert(isScopeRef(N, N.getScope()), "invalid scope", &N, N.getScope());
811 Assert(isTypeRef(N, N.getBaseType()), "invalid base type", &N,
815 static bool hasConflictingReferenceFlags(unsigned Flags) {
816 return (Flags & DINode::FlagLValueReference) &&
817 (Flags & DINode::FlagRValueReference);
820 void Verifier::visitTemplateParams(const MDNode &N, const Metadata &RawParams) {
821 auto *Params = dyn_cast<MDTuple>(&RawParams);
822 Assert(Params, "invalid template params", &N, &RawParams);
823 for (Metadata *Op : Params->operands()) {
824 Assert(Op && isa<DITemplateParameter>(Op), "invalid template parameter", &N,
829 void Verifier::visitDICompositeType(const DICompositeType &N) {
830 // Common scope checks.
833 Assert(N.getTag() == dwarf::DW_TAG_array_type ||
834 N.getTag() == dwarf::DW_TAG_structure_type ||
835 N.getTag() == dwarf::DW_TAG_union_type ||
836 N.getTag() == dwarf::DW_TAG_enumeration_type ||
837 N.getTag() == dwarf::DW_TAG_class_type,
840 Assert(isScopeRef(N, N.getScope()), "invalid scope", &N, N.getScope());
841 Assert(isTypeRef(N, N.getBaseType()), "invalid base type", &N,
844 Assert(!N.getRawElements() || isa<MDTuple>(N.getRawElements()),
845 "invalid composite elements", &N, N.getRawElements());
846 Assert(isTypeRef(N, N.getRawVTableHolder()), "invalid vtable holder", &N,
847 N.getRawVTableHolder());
848 Assert(!hasConflictingReferenceFlags(N.getFlags()), "invalid reference flags",
850 if (auto *Params = N.getRawTemplateParams())
851 visitTemplateParams(N, *Params);
853 if (N.getTag() == dwarf::DW_TAG_class_type ||
854 N.getTag() == dwarf::DW_TAG_union_type) {
855 Assert(N.getFile() && !N.getFile()->getFilename().empty(),
856 "class/union requires a filename", &N, N.getFile());
860 void Verifier::visitDISubroutineType(const DISubroutineType &N) {
861 Assert(N.getTag() == dwarf::DW_TAG_subroutine_type, "invalid tag", &N);
862 if (auto *Types = N.getRawTypeArray()) {
863 Assert(isa<MDTuple>(Types), "invalid composite elements", &N, Types);
864 for (Metadata *Ty : N.getTypeArray()->operands()) {
865 Assert(isTypeRef(N, Ty), "invalid subroutine type ref", &N, Types, Ty);
868 Assert(!hasConflictingReferenceFlags(N.getFlags()), "invalid reference flags",
872 void Verifier::visitDIFile(const DIFile &N) {
873 Assert(N.getTag() == dwarf::DW_TAG_file_type, "invalid tag", &N);
876 void Verifier::visitDICompileUnit(const DICompileUnit &N) {
877 Assert(N.isDistinct(), "compile units must be distinct", &N);
878 Assert(N.getTag() == dwarf::DW_TAG_compile_unit, "invalid tag", &N);
880 // Don't bother verifying the compilation directory or producer string
881 // as those could be empty.
882 Assert(N.getRawFile() && isa<DIFile>(N.getRawFile()), "invalid file", &N,
884 Assert(!N.getFile()->getFilename().empty(), "invalid filename", &N,
887 if (auto *Array = N.getRawEnumTypes()) {
888 Assert(isa<MDTuple>(Array), "invalid enum list", &N, Array);
889 for (Metadata *Op : N.getEnumTypes()->operands()) {
890 auto *Enum = dyn_cast_or_null<DICompositeType>(Op);
891 Assert(Enum && Enum->getTag() == dwarf::DW_TAG_enumeration_type,
892 "invalid enum type", &N, N.getEnumTypes(), Op);
895 if (auto *Array = N.getRawRetainedTypes()) {
896 Assert(isa<MDTuple>(Array), "invalid retained type list", &N, Array);
897 for (Metadata *Op : N.getRetainedTypes()->operands()) {
898 Assert(Op && isa<DIType>(Op), "invalid retained type", &N, Op);
901 if (auto *Array = N.getRawSubprograms()) {
902 Assert(isa<MDTuple>(Array), "invalid subprogram list", &N, Array);
903 for (Metadata *Op : N.getSubprograms()->operands()) {
904 Assert(Op && isa<DISubprogram>(Op), "invalid subprogram ref", &N, Op);
907 if (auto *Array = N.getRawGlobalVariables()) {
908 Assert(isa<MDTuple>(Array), "invalid global variable list", &N, Array);
909 for (Metadata *Op : N.getGlobalVariables()->operands()) {
910 Assert(Op && isa<DIGlobalVariable>(Op), "invalid global variable ref", &N,
914 if (auto *Array = N.getRawImportedEntities()) {
915 Assert(isa<MDTuple>(Array), "invalid imported entity list", &N, Array);
916 for (Metadata *Op : N.getImportedEntities()->operands()) {
917 Assert(Op && isa<DIImportedEntity>(Op), "invalid imported entity ref", &N,
921 if (auto *Array = N.getRawMacros()) {
922 Assert(isa<MDTuple>(Array), "invalid macro list", &N, Array);
923 for (Metadata *Op : N.getMacros()->operands()) {
924 Assert(Op && isa<DIMacroNode>(Op), "invalid macro ref", &N, Op);
929 void Verifier::visitDISubprogram(const DISubprogram &N) {
930 Assert(N.getTag() == dwarf::DW_TAG_subprogram, "invalid tag", &N);
931 Assert(isScopeRef(N, N.getRawScope()), "invalid scope", &N, N.getRawScope());
932 if (auto *T = N.getRawType())
933 Assert(isa<DISubroutineType>(T), "invalid subroutine type", &N, T);
934 Assert(isTypeRef(N, N.getRawContainingType()), "invalid containing type", &N,
935 N.getRawContainingType());
936 if (auto *Params = N.getRawTemplateParams())
937 visitTemplateParams(N, *Params);
938 if (auto *S = N.getRawDeclaration()) {
939 Assert(isa<DISubprogram>(S) && !cast<DISubprogram>(S)->isDefinition(),
940 "invalid subprogram declaration", &N, S);
942 if (auto *RawVars = N.getRawVariables()) {
943 auto *Vars = dyn_cast<MDTuple>(RawVars);
944 Assert(Vars, "invalid variable list", &N, RawVars);
945 for (Metadata *Op : Vars->operands()) {
946 Assert(Op && isa<DILocalVariable>(Op), "invalid local variable", &N, Vars,
950 Assert(!hasConflictingReferenceFlags(N.getFlags()), "invalid reference flags",
953 if (N.isDefinition())
954 Assert(N.isDistinct(), "subprogram definitions must be distinct", &N);
957 void Verifier::visitDILexicalBlockBase(const DILexicalBlockBase &N) {
958 Assert(N.getTag() == dwarf::DW_TAG_lexical_block, "invalid tag", &N);
959 Assert(N.getRawScope() && isa<DILocalScope>(N.getRawScope()),
960 "invalid local scope", &N, N.getRawScope());
963 void Verifier::visitDILexicalBlock(const DILexicalBlock &N) {
964 visitDILexicalBlockBase(N);
966 Assert(N.getLine() || !N.getColumn(),
967 "cannot have column info without line info", &N);
970 void Verifier::visitDILexicalBlockFile(const DILexicalBlockFile &N) {
971 visitDILexicalBlockBase(N);
974 void Verifier::visitDINamespace(const DINamespace &N) {
975 Assert(N.getTag() == dwarf::DW_TAG_namespace, "invalid tag", &N);
976 if (auto *S = N.getRawScope())
977 Assert(isa<DIScope>(S), "invalid scope ref", &N, S);
980 void Verifier::visitDIMacro(const DIMacro &N) {
981 Assert(N.getMacinfoType() == dwarf::DW_MACINFO_define ||
982 N.getMacinfoType() == dwarf::DW_MACINFO_undef,
983 "invalid macinfo type", &N);
984 Assert(!N.getName().empty(), "anonymous macro", &N);
987 void Verifier::visitDIMacroFile(const DIMacroFile &N) {
988 Assert(N.getMacinfoType() == dwarf::DW_MACINFO_start_file,
989 "invalid macinfo type", &N);
990 if (auto *F = N.getRawFile())
991 Assert(isa<DIFile>(F), "invalid file", &N, F);
993 if (auto *Array = N.getRawElements()) {
994 Assert(isa<MDTuple>(Array), "invalid macro list", &N, Array);
995 for (Metadata *Op : N.getElements()->operands()) {
996 Assert(Op && isa<DIMacroNode>(Op), "invalid macro ref", &N, Op);
1001 void Verifier::visitDIModule(const DIModule &N) {
1002 Assert(N.getTag() == dwarf::DW_TAG_module, "invalid tag", &N);
1003 Assert(!N.getName().empty(), "anonymous module", &N);
1006 void Verifier::visitDITemplateParameter(const DITemplateParameter &N) {
1007 Assert(isTypeRef(N, N.getType()), "invalid type ref", &N, N.getType());
1010 void Verifier::visitDITemplateTypeParameter(const DITemplateTypeParameter &N) {
1011 visitDITemplateParameter(N);
1013 Assert(N.getTag() == dwarf::DW_TAG_template_type_parameter, "invalid tag",
1017 void Verifier::visitDITemplateValueParameter(
1018 const DITemplateValueParameter &N) {
1019 visitDITemplateParameter(N);
1021 Assert(N.getTag() == dwarf::DW_TAG_template_value_parameter ||
1022 N.getTag() == dwarf::DW_TAG_GNU_template_template_param ||
1023 N.getTag() == dwarf::DW_TAG_GNU_template_parameter_pack,
1027 void Verifier::visitDIVariable(const DIVariable &N) {
1028 if (auto *S = N.getRawScope())
1029 Assert(isa<DIScope>(S), "invalid scope", &N, S);
1030 Assert(isTypeRef(N, N.getRawType()), "invalid type ref", &N, N.getRawType());
1031 if (auto *F = N.getRawFile())
1032 Assert(isa<DIFile>(F), "invalid file", &N, F);
1035 void Verifier::visitDIGlobalVariable(const DIGlobalVariable &N) {
1036 // Checks common to all variables.
1039 Assert(N.getTag() == dwarf::DW_TAG_variable, "invalid tag", &N);
1040 Assert(!N.getName().empty(), "missing global variable name", &N);
1041 if (auto *V = N.getRawVariable()) {
1042 Assert(isa<ConstantAsMetadata>(V) &&
1043 !isa<Function>(cast<ConstantAsMetadata>(V)->getValue()),
1044 "invalid global varaible ref", &N, V);
1046 if (auto *Member = N.getRawStaticDataMemberDeclaration()) {
1047 Assert(isa<DIDerivedType>(Member), "invalid static data member declaration",
1052 void Verifier::visitDILocalVariable(const DILocalVariable &N) {
1053 // Checks common to all variables.
1056 Assert(N.getTag() == dwarf::DW_TAG_variable, "invalid tag", &N);
1057 Assert(N.getRawScope() && isa<DILocalScope>(N.getRawScope()),
1058 "local variable requires a valid scope", &N, N.getRawScope());
1061 void Verifier::visitDIExpression(const DIExpression &N) {
1062 Assert(N.isValid(), "invalid expression", &N);
1065 void Verifier::visitDIObjCProperty(const DIObjCProperty &N) {
1066 Assert(N.getTag() == dwarf::DW_TAG_APPLE_property, "invalid tag", &N);
1067 if (auto *T = N.getRawType())
1068 Assert(isTypeRef(N, T), "invalid type ref", &N, T);
1069 if (auto *F = N.getRawFile())
1070 Assert(isa<DIFile>(F), "invalid file", &N, F);
1073 void Verifier::visitDIImportedEntity(const DIImportedEntity &N) {
1074 Assert(N.getTag() == dwarf::DW_TAG_imported_module ||
1075 N.getTag() == dwarf::DW_TAG_imported_declaration,
1077 if (auto *S = N.getRawScope())
1078 Assert(isa<DIScope>(S), "invalid scope for imported entity", &N, S);
1079 Assert(isDIRef(N, N.getEntity()), "invalid imported entity", &N,
1083 void Verifier::visitComdat(const Comdat &C) {
1084 // The Module is invalid if the GlobalValue has private linkage. Entities
1085 // with private linkage don't have entries in the symbol table.
1086 if (const GlobalValue *GV = M->getNamedValue(C.getName()))
1087 Assert(!GV->hasPrivateLinkage(), "comdat global value has private linkage",
1091 void Verifier::visitModuleIdents(const Module &M) {
1092 const NamedMDNode *Idents = M.getNamedMetadata("llvm.ident");
1096 // llvm.ident takes a list of metadata entry. Each entry has only one string.
1097 // Scan each llvm.ident entry and make sure that this requirement is met.
1098 for (unsigned i = 0, e = Idents->getNumOperands(); i != e; ++i) {
1099 const MDNode *N = Idents->getOperand(i);
1100 Assert(N->getNumOperands() == 1,
1101 "incorrect number of operands in llvm.ident metadata", N);
1102 Assert(dyn_cast_or_null<MDString>(N->getOperand(0)),
1103 ("invalid value for llvm.ident metadata entry operand"
1104 "(the operand should be a string)"),
1109 void Verifier::visitModuleFlags(const Module &M) {
1110 const NamedMDNode *Flags = M.getModuleFlagsMetadata();
1113 // Scan each flag, and track the flags and requirements.
1114 DenseMap<const MDString*, const MDNode*> SeenIDs;
1115 SmallVector<const MDNode*, 16> Requirements;
1116 for (unsigned I = 0, E = Flags->getNumOperands(); I != E; ++I) {
1117 visitModuleFlag(Flags->getOperand(I), SeenIDs, Requirements);
1120 // Validate that the requirements in the module are valid.
1121 for (unsigned I = 0, E = Requirements.size(); I != E; ++I) {
1122 const MDNode *Requirement = Requirements[I];
1123 const MDString *Flag = cast<MDString>(Requirement->getOperand(0));
1124 const Metadata *ReqValue = Requirement->getOperand(1);
1126 const MDNode *Op = SeenIDs.lookup(Flag);
1128 CheckFailed("invalid requirement on flag, flag is not present in module",
1133 if (Op->getOperand(2) != ReqValue) {
1134 CheckFailed(("invalid requirement on flag, "
1135 "flag does not have the required value"),
1143 Verifier::visitModuleFlag(const MDNode *Op,
1144 DenseMap<const MDString *, const MDNode *> &SeenIDs,
1145 SmallVectorImpl<const MDNode *> &Requirements) {
1146 // Each module flag should have three arguments, the merge behavior (a
1147 // constant int), the flag ID (an MDString), and the value.
1148 Assert(Op->getNumOperands() == 3,
1149 "incorrect number of operands in module flag", Op);
1150 Module::ModFlagBehavior MFB;
1151 if (!Module::isValidModFlagBehavior(Op->getOperand(0), MFB)) {
1153 mdconst::dyn_extract_or_null<ConstantInt>(Op->getOperand(0)),
1154 "invalid behavior operand in module flag (expected constant integer)",
1157 "invalid behavior operand in module flag (unexpected constant)",
1160 MDString *ID = dyn_cast_or_null<MDString>(Op->getOperand(1));
1161 Assert(ID, "invalid ID operand in module flag (expected metadata string)",
1164 // Sanity check the values for behaviors with additional requirements.
1167 case Module::Warning:
1168 case Module::Override:
1169 // These behavior types accept any value.
1172 case Module::Require: {
1173 // The value should itself be an MDNode with two operands, a flag ID (an
1174 // MDString), and a value.
1175 MDNode *Value = dyn_cast<MDNode>(Op->getOperand(2));
1176 Assert(Value && Value->getNumOperands() == 2,
1177 "invalid value for 'require' module flag (expected metadata pair)",
1179 Assert(isa<MDString>(Value->getOperand(0)),
1180 ("invalid value for 'require' module flag "
1181 "(first value operand should be a string)"),
1182 Value->getOperand(0));
1184 // Append it to the list of requirements, to check once all module flags are
1186 Requirements.push_back(Value);
1190 case Module::Append:
1191 case Module::AppendUnique: {
1192 // These behavior types require the operand be an MDNode.
1193 Assert(isa<MDNode>(Op->getOperand(2)),
1194 "invalid value for 'append'-type module flag "
1195 "(expected a metadata node)",
1201 // Unless this is a "requires" flag, check the ID is unique.
1202 if (MFB != Module::Require) {
1203 bool Inserted = SeenIDs.insert(std::make_pair(ID, Op)).second;
1205 "module flag identifiers must be unique (or of 'require' type)", ID);
1209 void Verifier::VerifyAttributeTypes(AttributeSet Attrs, unsigned Idx,
1210 bool isFunction, const Value *V) {
1211 unsigned Slot = ~0U;
1212 for (unsigned I = 0, E = Attrs.getNumSlots(); I != E; ++I)
1213 if (Attrs.getSlotIndex(I) == Idx) {
1218 assert(Slot != ~0U && "Attribute set inconsistency!");
1220 for (AttributeSet::iterator I = Attrs.begin(Slot), E = Attrs.end(Slot);
1222 if (I->isStringAttribute())
1225 if (I->getKindAsEnum() == Attribute::NoReturn ||
1226 I->getKindAsEnum() == Attribute::NoUnwind ||
1227 I->getKindAsEnum() == Attribute::NoInline ||
1228 I->getKindAsEnum() == Attribute::AlwaysInline ||
1229 I->getKindAsEnum() == Attribute::OptimizeForSize ||
1230 I->getKindAsEnum() == Attribute::StackProtect ||
1231 I->getKindAsEnum() == Attribute::StackProtectReq ||
1232 I->getKindAsEnum() == Attribute::StackProtectStrong ||
1233 I->getKindAsEnum() == Attribute::SafeStack ||
1234 I->getKindAsEnum() == Attribute::NoRedZone ||
1235 I->getKindAsEnum() == Attribute::NoImplicitFloat ||
1236 I->getKindAsEnum() == Attribute::Naked ||
1237 I->getKindAsEnum() == Attribute::InlineHint ||
1238 I->getKindAsEnum() == Attribute::StackAlignment ||
1239 I->getKindAsEnum() == Attribute::UWTable ||
1240 I->getKindAsEnum() == Attribute::NonLazyBind ||
1241 I->getKindAsEnum() == Attribute::ReturnsTwice ||
1242 I->getKindAsEnum() == Attribute::SanitizeAddress ||
1243 I->getKindAsEnum() == Attribute::SanitizeThread ||
1244 I->getKindAsEnum() == Attribute::SanitizeMemory ||
1245 I->getKindAsEnum() == Attribute::MinSize ||
1246 I->getKindAsEnum() == Attribute::NoDuplicate ||
1247 I->getKindAsEnum() == Attribute::Builtin ||
1248 I->getKindAsEnum() == Attribute::NoBuiltin ||
1249 I->getKindAsEnum() == Attribute::Cold ||
1250 I->getKindAsEnum() == Attribute::OptimizeNone ||
1251 I->getKindAsEnum() == Attribute::JumpTable ||
1252 I->getKindAsEnum() == Attribute::Convergent ||
1253 I->getKindAsEnum() == Attribute::ArgMemOnly ||
1254 I->getKindAsEnum() == Attribute::NoRecurse) {
1256 CheckFailed("Attribute '" + I->getAsString() +
1257 "' only applies to functions!", V);
1260 } else if (I->getKindAsEnum() == Attribute::ReadOnly ||
1261 I->getKindAsEnum() == Attribute::ReadNone) {
1263 CheckFailed("Attribute '" + I->getAsString() +
1264 "' does not apply to function returns");
1267 } else if (isFunction) {
1268 CheckFailed("Attribute '" + I->getAsString() +
1269 "' does not apply to functions!", V);
1275 // VerifyParameterAttrs - Check the given attributes for an argument or return
1276 // value of the specified type. The value V is printed in error messages.
1277 void Verifier::VerifyParameterAttrs(AttributeSet Attrs, unsigned Idx, Type *Ty,
1278 bool isReturnValue, const Value *V) {
1279 if (!Attrs.hasAttributes(Idx))
1282 VerifyAttributeTypes(Attrs, Idx, false, V);
1285 Assert(!Attrs.hasAttribute(Idx, Attribute::ByVal) &&
1286 !Attrs.hasAttribute(Idx, Attribute::Nest) &&
1287 !Attrs.hasAttribute(Idx, Attribute::StructRet) &&
1288 !Attrs.hasAttribute(Idx, Attribute::NoCapture) &&
1289 !Attrs.hasAttribute(Idx, Attribute::Returned) &&
1290 !Attrs.hasAttribute(Idx, Attribute::InAlloca),
1291 "Attributes 'byval', 'inalloca', 'nest', 'sret', 'nocapture', and "
1292 "'returned' do not apply to return values!",
1295 // Check for mutually incompatible attributes. Only inreg is compatible with
1297 unsigned AttrCount = 0;
1298 AttrCount += Attrs.hasAttribute(Idx, Attribute::ByVal);
1299 AttrCount += Attrs.hasAttribute(Idx, Attribute::InAlloca);
1300 AttrCount += Attrs.hasAttribute(Idx, Attribute::StructRet) ||
1301 Attrs.hasAttribute(Idx, Attribute::InReg);
1302 AttrCount += Attrs.hasAttribute(Idx, Attribute::Nest);
1303 Assert(AttrCount <= 1, "Attributes 'byval', 'inalloca', 'inreg', 'nest', "
1304 "and 'sret' are incompatible!",
1307 Assert(!(Attrs.hasAttribute(Idx, Attribute::InAlloca) &&
1308 Attrs.hasAttribute(Idx, Attribute::ReadOnly)),
1310 "'inalloca and readonly' are incompatible!",
1313 Assert(!(Attrs.hasAttribute(Idx, Attribute::StructRet) &&
1314 Attrs.hasAttribute(Idx, Attribute::Returned)),
1316 "'sret and returned' are incompatible!",
1319 Assert(!(Attrs.hasAttribute(Idx, Attribute::ZExt) &&
1320 Attrs.hasAttribute(Idx, Attribute::SExt)),
1322 "'zeroext and signext' are incompatible!",
1325 Assert(!(Attrs.hasAttribute(Idx, Attribute::ReadNone) &&
1326 Attrs.hasAttribute(Idx, Attribute::ReadOnly)),
1328 "'readnone and readonly' are incompatible!",
1331 Assert(!(Attrs.hasAttribute(Idx, Attribute::NoInline) &&
1332 Attrs.hasAttribute(Idx, Attribute::AlwaysInline)),
1334 "'noinline and alwaysinline' are incompatible!",
1337 Assert(!AttrBuilder(Attrs, Idx)
1338 .overlaps(AttributeFuncs::typeIncompatible(Ty)),
1339 "Wrong types for attribute: " +
1340 AttributeSet::get(*Context, Idx,
1341 AttributeFuncs::typeIncompatible(Ty)).getAsString(Idx),
1344 if (PointerType *PTy = dyn_cast<PointerType>(Ty)) {
1345 SmallPtrSet<Type*, 4> Visited;
1346 if (!PTy->getElementType()->isSized(&Visited)) {
1347 Assert(!Attrs.hasAttribute(Idx, Attribute::ByVal) &&
1348 !Attrs.hasAttribute(Idx, Attribute::InAlloca),
1349 "Attributes 'byval' and 'inalloca' do not support unsized types!",
1353 Assert(!Attrs.hasAttribute(Idx, Attribute::ByVal),
1354 "Attribute 'byval' only applies to parameters with pointer type!",
1359 // VerifyFunctionAttrs - Check parameter attributes against a function type.
1360 // The value V is printed in error messages.
1361 void Verifier::VerifyFunctionAttrs(FunctionType *FT, AttributeSet Attrs,
1363 if (Attrs.isEmpty())
1366 bool SawNest = false;
1367 bool SawReturned = false;
1368 bool SawSRet = false;
1370 for (unsigned i = 0, e = Attrs.getNumSlots(); i != e; ++i) {
1371 unsigned Idx = Attrs.getSlotIndex(i);
1375 Ty = FT->getReturnType();
1376 else if (Idx-1 < FT->getNumParams())
1377 Ty = FT->getParamType(Idx-1);
1379 break; // VarArgs attributes, verified elsewhere.
1381 VerifyParameterAttrs(Attrs, Idx, Ty, Idx == 0, V);
1386 if (Attrs.hasAttribute(Idx, Attribute::Nest)) {
1387 Assert(!SawNest, "More than one parameter has attribute nest!", V);
1391 if (Attrs.hasAttribute(Idx, Attribute::Returned)) {
1392 Assert(!SawReturned, "More than one parameter has attribute returned!",
1394 Assert(Ty->canLosslesslyBitCastTo(FT->getReturnType()),
1396 "argument and return types for 'returned' attribute",
1401 if (Attrs.hasAttribute(Idx, Attribute::StructRet)) {
1402 Assert(!SawSRet, "Cannot have multiple 'sret' parameters!", V);
1403 Assert(Idx == 1 || Idx == 2,
1404 "Attribute 'sret' is not on first or second parameter!", V);
1408 if (Attrs.hasAttribute(Idx, Attribute::InAlloca)) {
1409 Assert(Idx == FT->getNumParams(), "inalloca isn't on the last parameter!",
1414 if (!Attrs.hasAttributes(AttributeSet::FunctionIndex))
1417 VerifyAttributeTypes(Attrs, AttributeSet::FunctionIndex, true, V);
1420 !(Attrs.hasAttribute(AttributeSet::FunctionIndex, Attribute::ReadNone) &&
1421 Attrs.hasAttribute(AttributeSet::FunctionIndex, Attribute::ReadOnly)),
1422 "Attributes 'readnone and readonly' are incompatible!", V);
1425 !(Attrs.hasAttribute(AttributeSet::FunctionIndex, Attribute::NoInline) &&
1426 Attrs.hasAttribute(AttributeSet::FunctionIndex,
1427 Attribute::AlwaysInline)),
1428 "Attributes 'noinline and alwaysinline' are incompatible!", V);
1430 if (Attrs.hasAttribute(AttributeSet::FunctionIndex,
1431 Attribute::OptimizeNone)) {
1432 Assert(Attrs.hasAttribute(AttributeSet::FunctionIndex, Attribute::NoInline),
1433 "Attribute 'optnone' requires 'noinline'!", V);
1435 Assert(!Attrs.hasAttribute(AttributeSet::FunctionIndex,
1436 Attribute::OptimizeForSize),
1437 "Attributes 'optsize and optnone' are incompatible!", V);
1439 Assert(!Attrs.hasAttribute(AttributeSet::FunctionIndex, Attribute::MinSize),
1440 "Attributes 'minsize and optnone' are incompatible!", V);
1443 if (Attrs.hasAttribute(AttributeSet::FunctionIndex,
1444 Attribute::JumpTable)) {
1445 const GlobalValue *GV = cast<GlobalValue>(V);
1446 Assert(GV->hasUnnamedAddr(),
1447 "Attribute 'jumptable' requires 'unnamed_addr'", V);
1451 void Verifier::VerifyFunctionMetadata(
1452 const SmallVector<std::pair<unsigned, MDNode *>, 4> MDs) {
1456 for (unsigned i = 0; i < MDs.size(); i++) {
1457 if (MDs[i].first == LLVMContext::MD_prof) {
1458 MDNode *MD = MDs[i].second;
1459 Assert(MD->getNumOperands() == 2,
1460 "!prof annotations should have exactly 2 operands", MD);
1462 // Check first operand.
1463 Assert(MD->getOperand(0) != nullptr, "first operand should not be null",
1465 Assert(isa<MDString>(MD->getOperand(0)),
1466 "expected string with name of the !prof annotation", MD);
1467 MDString *MDS = cast<MDString>(MD->getOperand(0));
1468 StringRef ProfName = MDS->getString();
1469 Assert(ProfName.equals("function_entry_count"),
1470 "first operand should be 'function_entry_count'", MD);
1472 // Check second operand.
1473 Assert(MD->getOperand(1) != nullptr, "second operand should not be null",
1475 Assert(isa<ConstantAsMetadata>(MD->getOperand(1)),
1476 "expected integer argument to function_entry_count", MD);
1481 void Verifier::visitConstantExprsRecursively(const Constant *EntryC) {
1482 if (!ConstantExprVisited.insert(EntryC).second)
1485 SmallVector<const Constant *, 16> Stack;
1486 Stack.push_back(EntryC);
1488 while (!Stack.empty()) {
1489 const Constant *C = Stack.pop_back_val();
1491 // Check this constant expression.
1492 if (const auto *CE = dyn_cast<ConstantExpr>(C))
1493 visitConstantExpr(CE);
1495 // Visit all sub-expressions.
1496 for (const Use &U : C->operands()) {
1497 const auto *OpC = dyn_cast<Constant>(U);
1500 if (isa<GlobalValue>(OpC))
1501 continue; // Global values get visited separately.
1502 if (!ConstantExprVisited.insert(OpC).second)
1504 Stack.push_back(OpC);
1509 void Verifier::visitConstantExpr(const ConstantExpr *CE) {
1510 if (CE->getOpcode() != Instruction::BitCast)
1513 Assert(CastInst::castIsValid(Instruction::BitCast, CE->getOperand(0),
1515 "Invalid bitcast", CE);
1518 bool Verifier::VerifyAttributeCount(AttributeSet Attrs, unsigned Params) {
1519 if (Attrs.getNumSlots() == 0)
1522 unsigned LastSlot = Attrs.getNumSlots() - 1;
1523 unsigned LastIndex = Attrs.getSlotIndex(LastSlot);
1524 if (LastIndex <= Params
1525 || (LastIndex == AttributeSet::FunctionIndex
1526 && (LastSlot == 0 || Attrs.getSlotIndex(LastSlot - 1) <= Params)))
1532 /// \brief Verify that statepoint intrinsic is well formed.
1533 void Verifier::VerifyStatepoint(ImmutableCallSite CS) {
1534 assert(CS.getCalledFunction() &&
1535 CS.getCalledFunction()->getIntrinsicID() ==
1536 Intrinsic::experimental_gc_statepoint);
1538 const Instruction &CI = *CS.getInstruction();
1540 Assert(!CS.doesNotAccessMemory() && !CS.onlyReadsMemory() &&
1541 !CS.onlyAccessesArgMemory(),
1542 "gc.statepoint must read and write all memory to preserve "
1543 "reordering restrictions required by safepoint semantics",
1546 const Value *IDV = CS.getArgument(0);
1547 Assert(isa<ConstantInt>(IDV), "gc.statepoint ID must be a constant integer",
1550 const Value *NumPatchBytesV = CS.getArgument(1);
1551 Assert(isa<ConstantInt>(NumPatchBytesV),
1552 "gc.statepoint number of patchable bytes must be a constant integer",
1554 const int64_t NumPatchBytes =
1555 cast<ConstantInt>(NumPatchBytesV)->getSExtValue();
1556 assert(isInt<32>(NumPatchBytes) && "NumPatchBytesV is an i32!");
1557 Assert(NumPatchBytes >= 0, "gc.statepoint number of patchable bytes must be "
1561 const Value *Target = CS.getArgument(2);
1562 auto *PT = dyn_cast<PointerType>(Target->getType());
1563 Assert(PT && PT->getElementType()->isFunctionTy(),
1564 "gc.statepoint callee must be of function pointer type", &CI, Target);
1565 FunctionType *TargetFuncType = cast<FunctionType>(PT->getElementType());
1567 const Value *NumCallArgsV = CS.getArgument(3);
1568 Assert(isa<ConstantInt>(NumCallArgsV),
1569 "gc.statepoint number of arguments to underlying call "
1570 "must be constant integer",
1572 const int NumCallArgs = cast<ConstantInt>(NumCallArgsV)->getZExtValue();
1573 Assert(NumCallArgs >= 0,
1574 "gc.statepoint number of arguments to underlying call "
1577 const int NumParams = (int)TargetFuncType->getNumParams();
1578 if (TargetFuncType->isVarArg()) {
1579 Assert(NumCallArgs >= NumParams,
1580 "gc.statepoint mismatch in number of vararg call args", &CI);
1582 // TODO: Remove this limitation
1583 Assert(TargetFuncType->getReturnType()->isVoidTy(),
1584 "gc.statepoint doesn't support wrapping non-void "
1585 "vararg functions yet",
1588 Assert(NumCallArgs == NumParams,
1589 "gc.statepoint mismatch in number of call args", &CI);
1591 const Value *FlagsV = CS.getArgument(4);
1592 Assert(isa<ConstantInt>(FlagsV),
1593 "gc.statepoint flags must be constant integer", &CI);
1594 const uint64_t Flags = cast<ConstantInt>(FlagsV)->getZExtValue();
1595 Assert((Flags & ~(uint64_t)StatepointFlags::MaskAll) == 0,
1596 "unknown flag used in gc.statepoint flags argument", &CI);
1598 // Verify that the types of the call parameter arguments match
1599 // the type of the wrapped callee.
1600 for (int i = 0; i < NumParams; i++) {
1601 Type *ParamType = TargetFuncType->getParamType(i);
1602 Type *ArgType = CS.getArgument(5 + i)->getType();
1603 Assert(ArgType == ParamType,
1604 "gc.statepoint call argument does not match wrapped "
1609 const int EndCallArgsInx = 4 + NumCallArgs;
1611 const Value *NumTransitionArgsV = CS.getArgument(EndCallArgsInx+1);
1612 Assert(isa<ConstantInt>(NumTransitionArgsV),
1613 "gc.statepoint number of transition arguments "
1614 "must be constant integer",
1616 const int NumTransitionArgs =
1617 cast<ConstantInt>(NumTransitionArgsV)->getZExtValue();
1618 Assert(NumTransitionArgs >= 0,
1619 "gc.statepoint number of transition arguments must be positive", &CI);
1620 const int EndTransitionArgsInx = EndCallArgsInx + 1 + NumTransitionArgs;
1622 const Value *NumDeoptArgsV = CS.getArgument(EndTransitionArgsInx+1);
1623 Assert(isa<ConstantInt>(NumDeoptArgsV),
1624 "gc.statepoint number of deoptimization arguments "
1625 "must be constant integer",
1627 const int NumDeoptArgs = cast<ConstantInt>(NumDeoptArgsV)->getZExtValue();
1628 Assert(NumDeoptArgs >= 0, "gc.statepoint number of deoptimization arguments "
1632 const int ExpectedNumArgs =
1633 7 + NumCallArgs + NumTransitionArgs + NumDeoptArgs;
1634 Assert(ExpectedNumArgs <= (int)CS.arg_size(),
1635 "gc.statepoint too few arguments according to length fields", &CI);
1637 // Check that the only uses of this gc.statepoint are gc.result or
1638 // gc.relocate calls which are tied to this statepoint and thus part
1639 // of the same statepoint sequence
1640 for (const User *U : CI.users()) {
1641 const CallInst *Call = dyn_cast<const CallInst>(U);
1642 Assert(Call, "illegal use of statepoint token", &CI, U);
1643 if (!Call) continue;
1644 Assert(isGCRelocate(Call) || isGCResult(Call),
1645 "gc.result or gc.relocate are the only value uses"
1646 "of a gc.statepoint",
1648 if (isGCResult(Call)) {
1649 Assert(Call->getArgOperand(0) == &CI,
1650 "gc.result connected to wrong gc.statepoint", &CI, Call);
1651 } else if (isGCRelocate(Call)) {
1652 Assert(Call->getArgOperand(0) == &CI,
1653 "gc.relocate connected to wrong gc.statepoint", &CI, Call);
1657 // Note: It is legal for a single derived pointer to be listed multiple
1658 // times. It's non-optimal, but it is legal. It can also happen after
1659 // insertion if we strip a bitcast away.
1660 // Note: It is really tempting to check that each base is relocated and
1661 // that a derived pointer is never reused as a base pointer. This turns
1662 // out to be problematic since optimizations run after safepoint insertion
1663 // can recognize equality properties that the insertion logic doesn't know
1664 // about. See example statepoint.ll in the verifier subdirectory
1667 void Verifier::verifyFrameRecoverIndices() {
1668 for (auto &Counts : FrameEscapeInfo) {
1669 Function *F = Counts.first;
1670 unsigned EscapedObjectCount = Counts.second.first;
1671 unsigned MaxRecoveredIndex = Counts.second.second;
1672 Assert(MaxRecoveredIndex <= EscapedObjectCount,
1673 "all indices passed to llvm.localrecover must be less than the "
1674 "number of arguments passed ot llvm.localescape in the parent "
1680 // visitFunction - Verify that a function is ok.
1682 void Verifier::visitFunction(const Function &F) {
1683 // Check function arguments.
1684 FunctionType *FT = F.getFunctionType();
1685 unsigned NumArgs = F.arg_size();
1687 Assert(Context == &F.getContext(),
1688 "Function context does not match Module context!", &F);
1690 Assert(!F.hasCommonLinkage(), "Functions may not have common linkage", &F);
1691 Assert(FT->getNumParams() == NumArgs,
1692 "# formal arguments must match # of arguments for function type!", &F,
1694 Assert(F.getReturnType()->isFirstClassType() ||
1695 F.getReturnType()->isVoidTy() || F.getReturnType()->isStructTy(),
1696 "Functions cannot return aggregate values!", &F);
1698 Assert(!F.hasStructRetAttr() || F.getReturnType()->isVoidTy(),
1699 "Invalid struct return type!", &F);
1701 AttributeSet Attrs = F.getAttributes();
1703 Assert(VerifyAttributeCount(Attrs, FT->getNumParams()),
1704 "Attribute after last parameter!", &F);
1706 // Check function attributes.
1707 VerifyFunctionAttrs(FT, Attrs, &F);
1709 // On function declarations/definitions, we do not support the builtin
1710 // attribute. We do not check this in VerifyFunctionAttrs since that is
1711 // checking for Attributes that can/can not ever be on functions.
1712 Assert(!Attrs.hasAttribute(AttributeSet::FunctionIndex, Attribute::Builtin),
1713 "Attribute 'builtin' can only be applied to a callsite.", &F);
1715 // Check that this function meets the restrictions on this calling convention.
1716 // Sometimes varargs is used for perfectly forwarding thunks, so some of these
1717 // restrictions can be lifted.
1718 switch (F.getCallingConv()) {
1720 case CallingConv::C:
1722 case CallingConv::Fast:
1723 case CallingConv::Cold:
1724 case CallingConv::Intel_OCL_BI:
1725 case CallingConv::PTX_Kernel:
1726 case CallingConv::PTX_Device:
1727 Assert(!F.isVarArg(), "Calling convention does not support varargs or "
1728 "perfect forwarding!",
1733 bool isLLVMdotName = F.getName().size() >= 5 &&
1734 F.getName().substr(0, 5) == "llvm.";
1736 // Check that the argument values match the function type for this function...
1738 for (Function::const_arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E;
1740 Assert(I->getType() == FT->getParamType(i),
1741 "Argument value does not match function argument type!", I,
1742 FT->getParamType(i));
1743 Assert(I->getType()->isFirstClassType(),
1744 "Function arguments must have first-class types!", I);
1745 if (!isLLVMdotName) {
1746 Assert(!I->getType()->isMetadataTy(),
1747 "Function takes metadata but isn't an intrinsic", I, &F);
1748 Assert(!I->getType()->isTokenTy(),
1749 "Function takes token but isn't an intrinsic", I, &F);
1754 Assert(!F.getReturnType()->isTokenTy(),
1755 "Functions returns a token but isn't an intrinsic", &F);
1757 // Get the function metadata attachments.
1758 SmallVector<std::pair<unsigned, MDNode *>, 4> MDs;
1759 F.getAllMetadata(MDs);
1760 assert(F.hasMetadata() != MDs.empty() && "Bit out-of-sync");
1761 VerifyFunctionMetadata(MDs);
1763 // Check validity of the personality function
1764 if (F.hasPersonalityFn()) {
1765 auto *Per = dyn_cast<Function>(F.getPersonalityFn()->stripPointerCasts());
1767 Assert(Per->getParent() == F.getParent(),
1768 "Referencing personality function in another module!",
1769 &F, F.getParent(), Per, Per->getParent());
1772 if (F.isMaterializable()) {
1773 // Function has a body somewhere we can't see.
1774 Assert(MDs.empty(), "unmaterialized function cannot have metadata", &F,
1775 MDs.empty() ? nullptr : MDs.front().second);
1776 } else if (F.isDeclaration()) {
1777 Assert(F.hasExternalLinkage() || F.hasExternalWeakLinkage(),
1778 "invalid linkage type for function declaration", &F);
1779 Assert(MDs.empty(), "function without a body cannot have metadata", &F,
1780 MDs.empty() ? nullptr : MDs.front().second);
1781 Assert(!F.hasPersonalityFn(),
1782 "Function declaration shouldn't have a personality routine", &F);
1784 // Verify that this function (which has a body) is not named "llvm.*". It
1785 // is not legal to define intrinsics.
1786 Assert(!isLLVMdotName, "llvm intrinsics cannot be defined!", &F);
1788 // Check the entry node
1789 const BasicBlock *Entry = &F.getEntryBlock();
1790 Assert(pred_empty(Entry),
1791 "Entry block to function must not have predecessors!", Entry);
1793 // The address of the entry block cannot be taken, unless it is dead.
1794 if (Entry->hasAddressTaken()) {
1795 Assert(!BlockAddress::lookup(Entry)->isConstantUsed(),
1796 "blockaddress may not be used with the entry block!", Entry);
1799 // Visit metadata attachments.
1800 for (const auto &I : MDs) {
1801 // Verify that the attachment is legal.
1805 case LLVMContext::MD_dbg:
1806 Assert(isa<DISubprogram>(I.second),
1807 "function !dbg attachment must be a subprogram", &F, I.second);
1811 // Verify the metadata itself.
1812 visitMDNode(*I.second);
1816 // If this function is actually an intrinsic, verify that it is only used in
1817 // direct call/invokes, never having its "address taken".
1818 if (F.getIntrinsicID()) {
1820 if (F.hasAddressTaken(&U))
1821 Assert(0, "Invalid user of intrinsic instruction!", U);
1824 Assert(!F.hasDLLImportStorageClass() ||
1825 (F.isDeclaration() && F.hasExternalLinkage()) ||
1826 F.hasAvailableExternallyLinkage(),
1827 "Function is marked as dllimport, but not external.", &F);
1829 auto *N = F.getSubprogram();
1833 // Check that all !dbg attachments lead to back to N (or, at least, another
1834 // subprogram that describes the same function).
1836 // FIXME: Check this incrementally while visiting !dbg attachments.
1837 // FIXME: Only check when N is the canonical subprogram for F.
1838 SmallPtrSet<const MDNode *, 32> Seen;
1840 for (auto &I : BB) {
1841 // Be careful about using DILocation here since we might be dealing with
1842 // broken code (this is the Verifier after all).
1844 dyn_cast_or_null<DILocation>(I.getDebugLoc().getAsMDNode());
1847 if (!Seen.insert(DL).second)
1850 DILocalScope *Scope = DL->getInlinedAtScope();
1851 if (Scope && !Seen.insert(Scope).second)
1854 DISubprogram *SP = Scope ? Scope->getSubprogram() : nullptr;
1856 // Scope and SP could be the same MDNode and we don't want to skip
1857 // validation in that case
1858 if (SP && ((Scope != SP) && !Seen.insert(SP).second))
1861 // FIXME: Once N is canonical, check "SP == &N".
1862 Assert(SP->describes(&F),
1863 "!dbg attachment points at wrong subprogram for function", N, &F,
1868 // verifyBasicBlock - Verify that a basic block is well formed...
1870 void Verifier::visitBasicBlock(BasicBlock &BB) {
1871 InstsInThisBlock.clear();
1873 // Ensure that basic blocks have terminators!
1874 Assert(BB.getTerminator(), "Basic Block does not have terminator!", &BB);
1876 // Check constraints that this basic block imposes on all of the PHI nodes in
1878 if (isa<PHINode>(BB.front())) {
1879 SmallVector<BasicBlock*, 8> Preds(pred_begin(&BB), pred_end(&BB));
1880 SmallVector<std::pair<BasicBlock*, Value*>, 8> Values;
1881 std::sort(Preds.begin(), Preds.end());
1883 for (BasicBlock::iterator I = BB.begin(); (PN = dyn_cast<PHINode>(I));++I) {
1884 // Ensure that PHI nodes have at least one entry!
1885 Assert(PN->getNumIncomingValues() != 0,
1886 "PHI nodes must have at least one entry. If the block is dead, "
1887 "the PHI should be removed!",
1889 Assert(PN->getNumIncomingValues() == Preds.size(),
1890 "PHINode should have one entry for each predecessor of its "
1891 "parent basic block!",
1894 // Get and sort all incoming values in the PHI node...
1896 Values.reserve(PN->getNumIncomingValues());
1897 for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i)
1898 Values.push_back(std::make_pair(PN->getIncomingBlock(i),
1899 PN->getIncomingValue(i)));
1900 std::sort(Values.begin(), Values.end());
1902 for (unsigned i = 0, e = Values.size(); i != e; ++i) {
1903 // Check to make sure that if there is more than one entry for a
1904 // particular basic block in this PHI node, that the incoming values are
1907 Assert(i == 0 || Values[i].first != Values[i - 1].first ||
1908 Values[i].second == Values[i - 1].second,
1909 "PHI node has multiple entries for the same basic block with "
1910 "different incoming values!",
1911 PN, Values[i].first, Values[i].second, Values[i - 1].second);
1913 // Check to make sure that the predecessors and PHI node entries are
1915 Assert(Values[i].first == Preds[i],
1916 "PHI node entries do not match predecessors!", PN,
1917 Values[i].first, Preds[i]);
1922 // Check that all instructions have their parent pointers set up correctly.
1925 Assert(I.getParent() == &BB, "Instruction has bogus parent pointer!");
1929 void Verifier::visitTerminatorInst(TerminatorInst &I) {
1930 // Ensure that terminators only exist at the end of the basic block.
1931 Assert(&I == I.getParent()->getTerminator(),
1932 "Terminator found in the middle of a basic block!", I.getParent());
1933 visitInstruction(I);
1936 void Verifier::visitBranchInst(BranchInst &BI) {
1937 if (BI.isConditional()) {
1938 Assert(BI.getCondition()->getType()->isIntegerTy(1),
1939 "Branch condition is not 'i1' type!", &BI, BI.getCondition());
1941 visitTerminatorInst(BI);
1944 void Verifier::visitReturnInst(ReturnInst &RI) {
1945 Function *F = RI.getParent()->getParent();
1946 unsigned N = RI.getNumOperands();
1947 if (F->getReturnType()->isVoidTy())
1949 "Found return instr that returns non-void in Function of void "
1951 &RI, F->getReturnType());
1953 Assert(N == 1 && F->getReturnType() == RI.getOperand(0)->getType(),
1954 "Function return type does not match operand "
1955 "type of return inst!",
1956 &RI, F->getReturnType());
1958 // Check to make sure that the return value has necessary properties for
1960 visitTerminatorInst(RI);
1963 void Verifier::visitSwitchInst(SwitchInst &SI) {
1964 // Check to make sure that all of the constants in the switch instruction
1965 // have the same type as the switched-on value.
1966 Type *SwitchTy = SI.getCondition()->getType();
1967 SmallPtrSet<ConstantInt*, 32> Constants;
1968 for (SwitchInst::CaseIt i = SI.case_begin(), e = SI.case_end(); i != e; ++i) {
1969 Assert(i.getCaseValue()->getType() == SwitchTy,
1970 "Switch constants must all be same type as switch value!", &SI);
1971 Assert(Constants.insert(i.getCaseValue()).second,
1972 "Duplicate integer as switch case", &SI, i.getCaseValue());
1975 visitTerminatorInst(SI);
1978 void Verifier::visitIndirectBrInst(IndirectBrInst &BI) {
1979 Assert(BI.getAddress()->getType()->isPointerTy(),
1980 "Indirectbr operand must have pointer type!", &BI);
1981 for (unsigned i = 0, e = BI.getNumDestinations(); i != e; ++i)
1982 Assert(BI.getDestination(i)->getType()->isLabelTy(),
1983 "Indirectbr destinations must all have pointer type!", &BI);
1985 visitTerminatorInst(BI);
1988 void Verifier::visitSelectInst(SelectInst &SI) {
1989 Assert(!SelectInst::areInvalidOperands(SI.getOperand(0), SI.getOperand(1),
1991 "Invalid operands for select instruction!", &SI);
1993 Assert(SI.getTrueValue()->getType() == SI.getType(),
1994 "Select values must have same type as select instruction!", &SI);
1995 visitInstruction(SI);
1998 /// visitUserOp1 - User defined operators shouldn't live beyond the lifetime of
1999 /// a pass, if any exist, it's an error.
2001 void Verifier::visitUserOp1(Instruction &I) {
2002 Assert(0, "User-defined operators should not live outside of a pass!", &I);
2005 void Verifier::visitTruncInst(TruncInst &I) {
2006 // Get the source and destination types
2007 Type *SrcTy = I.getOperand(0)->getType();
2008 Type *DestTy = I.getType();
2010 // Get the size of the types in bits, we'll need this later
2011 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
2012 unsigned DestBitSize = DestTy->getScalarSizeInBits();
2014 Assert(SrcTy->isIntOrIntVectorTy(), "Trunc only operates on integer", &I);
2015 Assert(DestTy->isIntOrIntVectorTy(), "Trunc only produces integer", &I);
2016 Assert(SrcTy->isVectorTy() == DestTy->isVectorTy(),
2017 "trunc source and destination must both be a vector or neither", &I);
2018 Assert(SrcBitSize > DestBitSize, "DestTy too big for Trunc", &I);
2020 visitInstruction(I);
2023 void Verifier::visitZExtInst(ZExtInst &I) {
2024 // Get the source and destination types
2025 Type *SrcTy = I.getOperand(0)->getType();
2026 Type *DestTy = I.getType();
2028 // Get the size of the types in bits, we'll need this later
2029 Assert(SrcTy->isIntOrIntVectorTy(), "ZExt only operates on integer", &I);
2030 Assert(DestTy->isIntOrIntVectorTy(), "ZExt only produces an integer", &I);
2031 Assert(SrcTy->isVectorTy() == DestTy->isVectorTy(),
2032 "zext source and destination must both be a vector or neither", &I);
2033 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
2034 unsigned DestBitSize = DestTy->getScalarSizeInBits();
2036 Assert(SrcBitSize < DestBitSize, "Type too small for ZExt", &I);
2038 visitInstruction(I);
2041 void Verifier::visitSExtInst(SExtInst &I) {
2042 // Get the source and destination types
2043 Type *SrcTy = I.getOperand(0)->getType();
2044 Type *DestTy = I.getType();
2046 // Get the size of the types in bits, we'll need this later
2047 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
2048 unsigned DestBitSize = DestTy->getScalarSizeInBits();
2050 Assert(SrcTy->isIntOrIntVectorTy(), "SExt only operates on integer", &I);
2051 Assert(DestTy->isIntOrIntVectorTy(), "SExt only produces an integer", &I);
2052 Assert(SrcTy->isVectorTy() == DestTy->isVectorTy(),
2053 "sext source and destination must both be a vector or neither", &I);
2054 Assert(SrcBitSize < DestBitSize, "Type too small for SExt", &I);
2056 visitInstruction(I);
2059 void Verifier::visitFPTruncInst(FPTruncInst &I) {
2060 // Get the source and destination types
2061 Type *SrcTy = I.getOperand(0)->getType();
2062 Type *DestTy = I.getType();
2063 // Get the size of the types in bits, we'll need this later
2064 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
2065 unsigned DestBitSize = DestTy->getScalarSizeInBits();
2067 Assert(SrcTy->isFPOrFPVectorTy(), "FPTrunc only operates on FP", &I);
2068 Assert(DestTy->isFPOrFPVectorTy(), "FPTrunc only produces an FP", &I);
2069 Assert(SrcTy->isVectorTy() == DestTy->isVectorTy(),
2070 "fptrunc source and destination must both be a vector or neither", &I);
2071 Assert(SrcBitSize > DestBitSize, "DestTy too big for FPTrunc", &I);
2073 visitInstruction(I);
2076 void Verifier::visitFPExtInst(FPExtInst &I) {
2077 // Get the source and destination types
2078 Type *SrcTy = I.getOperand(0)->getType();
2079 Type *DestTy = I.getType();
2081 // Get the size of the types in bits, we'll need this later
2082 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
2083 unsigned DestBitSize = DestTy->getScalarSizeInBits();
2085 Assert(SrcTy->isFPOrFPVectorTy(), "FPExt only operates on FP", &I);
2086 Assert(DestTy->isFPOrFPVectorTy(), "FPExt only produces an FP", &I);
2087 Assert(SrcTy->isVectorTy() == DestTy->isVectorTy(),
2088 "fpext source and destination must both be a vector or neither", &I);
2089 Assert(SrcBitSize < DestBitSize, "DestTy too small for FPExt", &I);
2091 visitInstruction(I);
2094 void Verifier::visitUIToFPInst(UIToFPInst &I) {
2095 // Get the source and destination types
2096 Type *SrcTy = I.getOperand(0)->getType();
2097 Type *DestTy = I.getType();
2099 bool SrcVec = SrcTy->isVectorTy();
2100 bool DstVec = DestTy->isVectorTy();
2102 Assert(SrcVec == DstVec,
2103 "UIToFP source and dest must both be vector or scalar", &I);
2104 Assert(SrcTy->isIntOrIntVectorTy(),
2105 "UIToFP source must be integer or integer vector", &I);
2106 Assert(DestTy->isFPOrFPVectorTy(), "UIToFP result must be FP or FP vector",
2109 if (SrcVec && DstVec)
2110 Assert(cast<VectorType>(SrcTy)->getNumElements() ==
2111 cast<VectorType>(DestTy)->getNumElements(),
2112 "UIToFP source and dest vector length mismatch", &I);
2114 visitInstruction(I);
2117 void Verifier::visitSIToFPInst(SIToFPInst &I) {
2118 // Get the source and destination types
2119 Type *SrcTy = I.getOperand(0)->getType();
2120 Type *DestTy = I.getType();
2122 bool SrcVec = SrcTy->isVectorTy();
2123 bool DstVec = DestTy->isVectorTy();
2125 Assert(SrcVec == DstVec,
2126 "SIToFP source and dest must both be vector or scalar", &I);
2127 Assert(SrcTy->isIntOrIntVectorTy(),
2128 "SIToFP source must be integer or integer vector", &I);
2129 Assert(DestTy->isFPOrFPVectorTy(), "SIToFP result must be FP or FP vector",
2132 if (SrcVec && DstVec)
2133 Assert(cast<VectorType>(SrcTy)->getNumElements() ==
2134 cast<VectorType>(DestTy)->getNumElements(),
2135 "SIToFP source and dest vector length mismatch", &I);
2137 visitInstruction(I);
2140 void Verifier::visitFPToUIInst(FPToUIInst &I) {
2141 // Get the source and destination types
2142 Type *SrcTy = I.getOperand(0)->getType();
2143 Type *DestTy = I.getType();
2145 bool SrcVec = SrcTy->isVectorTy();
2146 bool DstVec = DestTy->isVectorTy();
2148 Assert(SrcVec == DstVec,
2149 "FPToUI source and dest must both be vector or scalar", &I);
2150 Assert(SrcTy->isFPOrFPVectorTy(), "FPToUI source must be FP or FP vector",
2152 Assert(DestTy->isIntOrIntVectorTy(),
2153 "FPToUI result must be integer or integer vector", &I);
2155 if (SrcVec && DstVec)
2156 Assert(cast<VectorType>(SrcTy)->getNumElements() ==
2157 cast<VectorType>(DestTy)->getNumElements(),
2158 "FPToUI source and dest vector length mismatch", &I);
2160 visitInstruction(I);
2163 void Verifier::visitFPToSIInst(FPToSIInst &I) {
2164 // Get the source and destination types
2165 Type *SrcTy = I.getOperand(0)->getType();
2166 Type *DestTy = I.getType();
2168 bool SrcVec = SrcTy->isVectorTy();
2169 bool DstVec = DestTy->isVectorTy();
2171 Assert(SrcVec == DstVec,
2172 "FPToSI source and dest must both be vector or scalar", &I);
2173 Assert(SrcTy->isFPOrFPVectorTy(), "FPToSI source must be FP or FP vector",
2175 Assert(DestTy->isIntOrIntVectorTy(),
2176 "FPToSI result must be integer or integer vector", &I);
2178 if (SrcVec && DstVec)
2179 Assert(cast<VectorType>(SrcTy)->getNumElements() ==
2180 cast<VectorType>(DestTy)->getNumElements(),
2181 "FPToSI source and dest vector length mismatch", &I);
2183 visitInstruction(I);
2186 void Verifier::visitPtrToIntInst(PtrToIntInst &I) {
2187 // Get the source and destination types
2188 Type *SrcTy = I.getOperand(0)->getType();
2189 Type *DestTy = I.getType();
2191 Assert(SrcTy->getScalarType()->isPointerTy(),
2192 "PtrToInt source must be pointer", &I);
2193 Assert(DestTy->getScalarType()->isIntegerTy(),
2194 "PtrToInt result must be integral", &I);
2195 Assert(SrcTy->isVectorTy() == DestTy->isVectorTy(), "PtrToInt type mismatch",
2198 if (SrcTy->isVectorTy()) {
2199 VectorType *VSrc = dyn_cast<VectorType>(SrcTy);
2200 VectorType *VDest = dyn_cast<VectorType>(DestTy);
2201 Assert(VSrc->getNumElements() == VDest->getNumElements(),
2202 "PtrToInt Vector width mismatch", &I);
2205 visitInstruction(I);
2208 void Verifier::visitIntToPtrInst(IntToPtrInst &I) {
2209 // Get the source and destination types
2210 Type *SrcTy = I.getOperand(0)->getType();
2211 Type *DestTy = I.getType();
2213 Assert(SrcTy->getScalarType()->isIntegerTy(),
2214 "IntToPtr source must be an integral", &I);
2215 Assert(DestTy->getScalarType()->isPointerTy(),
2216 "IntToPtr result must be a pointer", &I);
2217 Assert(SrcTy->isVectorTy() == DestTy->isVectorTy(), "IntToPtr type mismatch",
2219 if (SrcTy->isVectorTy()) {
2220 VectorType *VSrc = dyn_cast<VectorType>(SrcTy);
2221 VectorType *VDest = dyn_cast<VectorType>(DestTy);
2222 Assert(VSrc->getNumElements() == VDest->getNumElements(),
2223 "IntToPtr Vector width mismatch", &I);
2225 visitInstruction(I);
2228 void Verifier::visitBitCastInst(BitCastInst &I) {
2230 CastInst::castIsValid(Instruction::BitCast, I.getOperand(0), I.getType()),
2231 "Invalid bitcast", &I);
2232 visitInstruction(I);
2235 void Verifier::visitAddrSpaceCastInst(AddrSpaceCastInst &I) {
2236 Type *SrcTy = I.getOperand(0)->getType();
2237 Type *DestTy = I.getType();
2239 Assert(SrcTy->isPtrOrPtrVectorTy(), "AddrSpaceCast source must be a pointer",
2241 Assert(DestTy->isPtrOrPtrVectorTy(), "AddrSpaceCast result must be a pointer",
2243 Assert(SrcTy->getPointerAddressSpace() != DestTy->getPointerAddressSpace(),
2244 "AddrSpaceCast must be between different address spaces", &I);
2245 if (SrcTy->isVectorTy())
2246 Assert(SrcTy->getVectorNumElements() == DestTy->getVectorNumElements(),
2247 "AddrSpaceCast vector pointer number of elements mismatch", &I);
2248 visitInstruction(I);
2251 /// visitPHINode - Ensure that a PHI node is well formed.
2253 void Verifier::visitPHINode(PHINode &PN) {
2254 // Ensure that the PHI nodes are all grouped together at the top of the block.
2255 // This can be tested by checking whether the instruction before this is
2256 // either nonexistent (because this is begin()) or is a PHI node. If not,
2257 // then there is some other instruction before a PHI.
2258 Assert(&PN == &PN.getParent()->front() ||
2259 isa<PHINode>(--BasicBlock::iterator(&PN)),
2260 "PHI nodes not grouped at top of basic block!", &PN, PN.getParent());
2262 // Check that a PHI doesn't yield a Token.
2263 Assert(!PN.getType()->isTokenTy(), "PHI nodes cannot have token type!");
2265 // Check that all of the values of the PHI node have the same type as the
2266 // result, and that the incoming blocks are really basic blocks.
2267 for (Value *IncValue : PN.incoming_values()) {
2268 Assert(PN.getType() == IncValue->getType(),
2269 "PHI node operands are not the same type as the result!", &PN);
2272 // All other PHI node constraints are checked in the visitBasicBlock method.
2274 visitInstruction(PN);
2277 void Verifier::VerifyCallSite(CallSite CS) {
2278 Instruction *I = CS.getInstruction();
2280 Assert(CS.getCalledValue()->getType()->isPointerTy(),
2281 "Called function must be a pointer!", I);
2282 PointerType *FPTy = cast<PointerType>(CS.getCalledValue()->getType());
2284 Assert(FPTy->getElementType()->isFunctionTy(),
2285 "Called function is not pointer to function type!", I);
2287 Assert(FPTy->getElementType() == CS.getFunctionType(),
2288 "Called function is not the same type as the call!", I);
2290 FunctionType *FTy = CS.getFunctionType();
2292 // Verify that the correct number of arguments are being passed
2293 if (FTy->isVarArg())
2294 Assert(CS.arg_size() >= FTy->getNumParams(),
2295 "Called function requires more parameters than were provided!", I);
2297 Assert(CS.arg_size() == FTy->getNumParams(),
2298 "Incorrect number of arguments passed to called function!", I);
2300 // Verify that all arguments to the call match the function type.
2301 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
2302 Assert(CS.getArgument(i)->getType() == FTy->getParamType(i),
2303 "Call parameter type does not match function signature!",
2304 CS.getArgument(i), FTy->getParamType(i), I);
2306 AttributeSet Attrs = CS.getAttributes();
2308 Assert(VerifyAttributeCount(Attrs, CS.arg_size()),
2309 "Attribute after last parameter!", I);
2311 // Verify call attributes.
2312 VerifyFunctionAttrs(FTy, Attrs, I);
2314 // Conservatively check the inalloca argument.
2315 // We have a bug if we can find that there is an underlying alloca without
2317 if (CS.hasInAllocaArgument()) {
2318 Value *InAllocaArg = CS.getArgument(FTy->getNumParams() - 1);
2319 if (auto AI = dyn_cast<AllocaInst>(InAllocaArg->stripInBoundsOffsets()))
2320 Assert(AI->isUsedWithInAlloca(),
2321 "inalloca argument for call has mismatched alloca", AI, I);
2324 if (FTy->isVarArg()) {
2325 // FIXME? is 'nest' even legal here?
2326 bool SawNest = false;
2327 bool SawReturned = false;
2329 for (unsigned Idx = 1; Idx < 1 + FTy->getNumParams(); ++Idx) {
2330 if (Attrs.hasAttribute(Idx, Attribute::Nest))
2332 if (Attrs.hasAttribute(Idx, Attribute::Returned))
2336 // Check attributes on the varargs part.
2337 for (unsigned Idx = 1 + FTy->getNumParams(); Idx <= CS.arg_size(); ++Idx) {
2338 Type *Ty = CS.getArgument(Idx-1)->getType();
2339 VerifyParameterAttrs(Attrs, Idx, Ty, false, I);
2341 if (Attrs.hasAttribute(Idx, Attribute::Nest)) {
2342 Assert(!SawNest, "More than one parameter has attribute nest!", I);
2346 if (Attrs.hasAttribute(Idx, Attribute::Returned)) {
2347 Assert(!SawReturned, "More than one parameter has attribute returned!",
2349 Assert(Ty->canLosslesslyBitCastTo(FTy->getReturnType()),
2350 "Incompatible argument and return types for 'returned' "
2356 Assert(!Attrs.hasAttribute(Idx, Attribute::StructRet),
2357 "Attribute 'sret' cannot be used for vararg call arguments!", I);
2359 if (Attrs.hasAttribute(Idx, Attribute::InAlloca))
2360 Assert(Idx == CS.arg_size(), "inalloca isn't on the last argument!", I);
2364 // Verify that there's no metadata unless it's a direct call to an intrinsic.
2365 if (CS.getCalledFunction() == nullptr ||
2366 !CS.getCalledFunction()->getName().startswith("llvm.")) {
2367 for (Type *ParamTy : FTy->params()) {
2368 Assert(!ParamTy->isMetadataTy(),
2369 "Function has metadata parameter but isn't an intrinsic", I);
2370 Assert(!ParamTy->isTokenTy(),
2371 "Function has token parameter but isn't an intrinsic", I);
2375 // Verify that indirect calls don't return tokens.
2376 if (CS.getCalledFunction() == nullptr)
2377 Assert(!FTy->getReturnType()->isTokenTy(),
2378 "Return type cannot be token for indirect call!");
2380 if (Function *F = CS.getCalledFunction())
2381 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
2382 visitIntrinsicCallSite(ID, CS);
2384 // Verify that a callsite has at most one "deopt" operand bundle.
2385 bool FoundDeoptBundle = false;
2386 for (unsigned i = 0, e = CS.getNumOperandBundles(); i < e; ++i) {
2387 if (CS.getOperandBundleAt(i).getTagID() == LLVMContext::OB_deopt) {
2388 Assert(!FoundDeoptBundle, "Multiple deopt operand bundles", I);
2389 FoundDeoptBundle = true;
2393 visitInstruction(*I);
2396 /// Two types are "congruent" if they are identical, or if they are both pointer
2397 /// types with different pointee types and the same address space.
2398 static bool isTypeCongruent(Type *L, Type *R) {
2401 PointerType *PL = dyn_cast<PointerType>(L);
2402 PointerType *PR = dyn_cast<PointerType>(R);
2405 return PL->getAddressSpace() == PR->getAddressSpace();
2408 static AttrBuilder getParameterABIAttributes(int I, AttributeSet Attrs) {
2409 static const Attribute::AttrKind ABIAttrs[] = {
2410 Attribute::StructRet, Attribute::ByVal, Attribute::InAlloca,
2411 Attribute::InReg, Attribute::Returned};
2413 for (auto AK : ABIAttrs) {
2414 if (Attrs.hasAttribute(I + 1, AK))
2415 Copy.addAttribute(AK);
2417 if (Attrs.hasAttribute(I + 1, Attribute::Alignment))
2418 Copy.addAlignmentAttr(Attrs.getParamAlignment(I + 1));
2422 void Verifier::verifyMustTailCall(CallInst &CI) {
2423 Assert(!CI.isInlineAsm(), "cannot use musttail call with inline asm", &CI);
2425 // - The caller and callee prototypes must match. Pointer types of
2426 // parameters or return types may differ in pointee type, but not
2428 Function *F = CI.getParent()->getParent();
2429 FunctionType *CallerTy = F->getFunctionType();
2430 FunctionType *CalleeTy = CI.getFunctionType();
2431 Assert(CallerTy->getNumParams() == CalleeTy->getNumParams(),
2432 "cannot guarantee tail call due to mismatched parameter counts", &CI);
2433 Assert(CallerTy->isVarArg() == CalleeTy->isVarArg(),
2434 "cannot guarantee tail call due to mismatched varargs", &CI);
2435 Assert(isTypeCongruent(CallerTy->getReturnType(), CalleeTy->getReturnType()),
2436 "cannot guarantee tail call due to mismatched return types", &CI);
2437 for (int I = 0, E = CallerTy->getNumParams(); I != E; ++I) {
2439 isTypeCongruent(CallerTy->getParamType(I), CalleeTy->getParamType(I)),
2440 "cannot guarantee tail call due to mismatched parameter types", &CI);
2443 // - The calling conventions of the caller and callee must match.
2444 Assert(F->getCallingConv() == CI.getCallingConv(),
2445 "cannot guarantee tail call due to mismatched calling conv", &CI);
2447 // - All ABI-impacting function attributes, such as sret, byval, inreg,
2448 // returned, and inalloca, must match.
2449 AttributeSet CallerAttrs = F->getAttributes();
2450 AttributeSet CalleeAttrs = CI.getAttributes();
2451 for (int I = 0, E = CallerTy->getNumParams(); I != E; ++I) {
2452 AttrBuilder CallerABIAttrs = getParameterABIAttributes(I, CallerAttrs);
2453 AttrBuilder CalleeABIAttrs = getParameterABIAttributes(I, CalleeAttrs);
2454 Assert(CallerABIAttrs == CalleeABIAttrs,
2455 "cannot guarantee tail call due to mismatched ABI impacting "
2456 "function attributes",
2457 &CI, CI.getOperand(I));
2460 // - The call must immediately precede a :ref:`ret <i_ret>` instruction,
2461 // or a pointer bitcast followed by a ret instruction.
2462 // - The ret instruction must return the (possibly bitcasted) value
2463 // produced by the call or void.
2464 Value *RetVal = &CI;
2465 Instruction *Next = CI.getNextNode();
2467 // Handle the optional bitcast.
2468 if (BitCastInst *BI = dyn_cast_or_null<BitCastInst>(Next)) {
2469 Assert(BI->getOperand(0) == RetVal,
2470 "bitcast following musttail call must use the call", BI);
2472 Next = BI->getNextNode();
2475 // Check the return.
2476 ReturnInst *Ret = dyn_cast_or_null<ReturnInst>(Next);
2477 Assert(Ret, "musttail call must be precede a ret with an optional bitcast",
2479 Assert(!Ret->getReturnValue() || Ret->getReturnValue() == RetVal,
2480 "musttail call result must be returned", Ret);
2483 void Verifier::visitCallInst(CallInst &CI) {
2484 VerifyCallSite(&CI);
2486 if (CI.isMustTailCall())
2487 verifyMustTailCall(CI);
2490 void Verifier::visitInvokeInst(InvokeInst &II) {
2491 VerifyCallSite(&II);
2493 // Verify that the first non-PHI instruction of the unwind destination is an
2494 // exception handling instruction.
2496 II.getUnwindDest()->isEHPad(),
2497 "The unwind destination does not have an exception handling instruction!",
2500 visitTerminatorInst(II);
2503 /// visitBinaryOperator - Check that both arguments to the binary operator are
2504 /// of the same type!
2506 void Verifier::visitBinaryOperator(BinaryOperator &B) {
2507 Assert(B.getOperand(0)->getType() == B.getOperand(1)->getType(),
2508 "Both operands to a binary operator are not of the same type!", &B);
2510 switch (B.getOpcode()) {
2511 // Check that integer arithmetic operators are only used with
2512 // integral operands.
2513 case Instruction::Add:
2514 case Instruction::Sub:
2515 case Instruction::Mul:
2516 case Instruction::SDiv:
2517 case Instruction::UDiv:
2518 case Instruction::SRem:
2519 case Instruction::URem:
2520 Assert(B.getType()->isIntOrIntVectorTy(),
2521 "Integer arithmetic operators only work with integral types!", &B);
2522 Assert(B.getType() == B.getOperand(0)->getType(),
2523 "Integer arithmetic operators must have same type "
2524 "for operands and result!",
2527 // Check that floating-point arithmetic operators are only used with
2528 // floating-point operands.
2529 case Instruction::FAdd:
2530 case Instruction::FSub:
2531 case Instruction::FMul:
2532 case Instruction::FDiv:
2533 case Instruction::FRem:
2534 Assert(B.getType()->isFPOrFPVectorTy(),
2535 "Floating-point arithmetic operators only work with "
2536 "floating-point types!",
2538 Assert(B.getType() == B.getOperand(0)->getType(),
2539 "Floating-point arithmetic operators must have same type "
2540 "for operands and result!",
2543 // Check that logical operators are only used with integral operands.
2544 case Instruction::And:
2545 case Instruction::Or:
2546 case Instruction::Xor:
2547 Assert(B.getType()->isIntOrIntVectorTy(),
2548 "Logical operators only work with integral types!", &B);
2549 Assert(B.getType() == B.getOperand(0)->getType(),
2550 "Logical operators must have same type for operands and result!",
2553 case Instruction::Shl:
2554 case Instruction::LShr:
2555 case Instruction::AShr:
2556 Assert(B.getType()->isIntOrIntVectorTy(),
2557 "Shifts only work with integral types!", &B);
2558 Assert(B.getType() == B.getOperand(0)->getType(),
2559 "Shift return type must be same as operands!", &B);
2562 llvm_unreachable("Unknown BinaryOperator opcode!");
2565 visitInstruction(B);
2568 void Verifier::visitICmpInst(ICmpInst &IC) {
2569 // Check that the operands are the same type
2570 Type *Op0Ty = IC.getOperand(0)->getType();
2571 Type *Op1Ty = IC.getOperand(1)->getType();
2572 Assert(Op0Ty == Op1Ty,
2573 "Both operands to ICmp instruction are not of the same type!", &IC);
2574 // Check that the operands are the right type
2575 Assert(Op0Ty->isIntOrIntVectorTy() || Op0Ty->getScalarType()->isPointerTy(),
2576 "Invalid operand types for ICmp instruction", &IC);
2577 // Check that the predicate is valid.
2578 Assert(IC.getPredicate() >= CmpInst::FIRST_ICMP_PREDICATE &&
2579 IC.getPredicate() <= CmpInst::LAST_ICMP_PREDICATE,
2580 "Invalid predicate in ICmp instruction!", &IC);
2582 visitInstruction(IC);
2585 void Verifier::visitFCmpInst(FCmpInst &FC) {
2586 // Check that the operands are the same type
2587 Type *Op0Ty = FC.getOperand(0)->getType();
2588 Type *Op1Ty = FC.getOperand(1)->getType();
2589 Assert(Op0Ty == Op1Ty,
2590 "Both operands to FCmp instruction are not of the same type!", &FC);
2591 // Check that the operands are the right type
2592 Assert(Op0Ty->isFPOrFPVectorTy(),
2593 "Invalid operand types for FCmp instruction", &FC);
2594 // Check that the predicate is valid.
2595 Assert(FC.getPredicate() >= CmpInst::FIRST_FCMP_PREDICATE &&
2596 FC.getPredicate() <= CmpInst::LAST_FCMP_PREDICATE,
2597 "Invalid predicate in FCmp instruction!", &FC);
2599 visitInstruction(FC);
2602 void Verifier::visitExtractElementInst(ExtractElementInst &EI) {
2604 ExtractElementInst::isValidOperands(EI.getOperand(0), EI.getOperand(1)),
2605 "Invalid extractelement operands!", &EI);
2606 visitInstruction(EI);
2609 void Verifier::visitInsertElementInst(InsertElementInst &IE) {
2610 Assert(InsertElementInst::isValidOperands(IE.getOperand(0), IE.getOperand(1),
2612 "Invalid insertelement operands!", &IE);
2613 visitInstruction(IE);
2616 void Verifier::visitShuffleVectorInst(ShuffleVectorInst &SV) {
2617 Assert(ShuffleVectorInst::isValidOperands(SV.getOperand(0), SV.getOperand(1),
2619 "Invalid shufflevector operands!", &SV);
2620 visitInstruction(SV);
2623 void Verifier::visitGetElementPtrInst(GetElementPtrInst &GEP) {
2624 Type *TargetTy = GEP.getPointerOperandType()->getScalarType();
2626 Assert(isa<PointerType>(TargetTy),
2627 "GEP base pointer is not a vector or a vector of pointers", &GEP);
2628 Assert(GEP.getSourceElementType()->isSized(), "GEP into unsized type!", &GEP);
2629 SmallVector<Value*, 16> Idxs(GEP.idx_begin(), GEP.idx_end());
2631 GetElementPtrInst::getIndexedType(GEP.getSourceElementType(), Idxs);
2632 Assert(ElTy, "Invalid indices for GEP pointer type!", &GEP);
2634 Assert(GEP.getType()->getScalarType()->isPointerTy() &&
2635 GEP.getResultElementType() == ElTy,
2636 "GEP is not of right type for indices!", &GEP, ElTy);
2638 if (GEP.getType()->isVectorTy()) {
2639 // Additional checks for vector GEPs.
2640 unsigned GEPWidth = GEP.getType()->getVectorNumElements();
2641 if (GEP.getPointerOperandType()->isVectorTy())
2642 Assert(GEPWidth == GEP.getPointerOperandType()->getVectorNumElements(),
2643 "Vector GEP result width doesn't match operand's", &GEP);
2644 for (unsigned i = 0, e = Idxs.size(); i != e; ++i) {
2645 Type *IndexTy = Idxs[i]->getType();
2646 if (IndexTy->isVectorTy()) {
2647 unsigned IndexWidth = IndexTy->getVectorNumElements();
2648 Assert(IndexWidth == GEPWidth, "Invalid GEP index vector width", &GEP);
2650 Assert(IndexTy->getScalarType()->isIntegerTy(),
2651 "All GEP indices should be of integer type");
2654 visitInstruction(GEP);
2657 static bool isContiguous(const ConstantRange &A, const ConstantRange &B) {
2658 return A.getUpper() == B.getLower() || A.getLower() == B.getUpper();
2661 void Verifier::visitRangeMetadata(Instruction& I,
2662 MDNode* Range, Type* Ty) {
2664 Range == I.getMetadata(LLVMContext::MD_range) &&
2665 "precondition violation");
2667 unsigned NumOperands = Range->getNumOperands();
2668 Assert(NumOperands % 2 == 0, "Unfinished range!", Range);
2669 unsigned NumRanges = NumOperands / 2;
2670 Assert(NumRanges >= 1, "It should have at least one range!", Range);
2672 ConstantRange LastRange(1); // Dummy initial value
2673 for (unsigned i = 0; i < NumRanges; ++i) {
2675 mdconst::dyn_extract<ConstantInt>(Range->getOperand(2 * i));
2676 Assert(Low, "The lower limit must be an integer!", Low);
2678 mdconst::dyn_extract<ConstantInt>(Range->getOperand(2 * i + 1));
2679 Assert(High, "The upper limit must be an integer!", High);
2680 Assert(High->getType() == Low->getType() && High->getType() == Ty,
2681 "Range types must match instruction type!", &I);
2683 APInt HighV = High->getValue();
2684 APInt LowV = Low->getValue();
2685 ConstantRange CurRange(LowV, HighV);
2686 Assert(!CurRange.isEmptySet() && !CurRange.isFullSet(),
2687 "Range must not be empty!", Range);
2689 Assert(CurRange.intersectWith(LastRange).isEmptySet(),
2690 "Intervals are overlapping", Range);
2691 Assert(LowV.sgt(LastRange.getLower()), "Intervals are not in order",
2693 Assert(!isContiguous(CurRange, LastRange), "Intervals are contiguous",
2696 LastRange = ConstantRange(LowV, HighV);
2698 if (NumRanges > 2) {
2700 mdconst::dyn_extract<ConstantInt>(Range->getOperand(0))->getValue();
2702 mdconst::dyn_extract<ConstantInt>(Range->getOperand(1))->getValue();
2703 ConstantRange FirstRange(FirstLow, FirstHigh);
2704 Assert(FirstRange.intersectWith(LastRange).isEmptySet(),
2705 "Intervals are overlapping", Range);
2706 Assert(!isContiguous(FirstRange, LastRange), "Intervals are contiguous",
2711 void Verifier::visitLoadInst(LoadInst &LI) {
2712 PointerType *PTy = dyn_cast<PointerType>(LI.getOperand(0)->getType());
2713 Assert(PTy, "Load operand must be a pointer.", &LI);
2714 Type *ElTy = LI.getType();
2715 Assert(LI.getAlignment() <= Value::MaximumAlignment,
2716 "huge alignment values are unsupported", &LI);
2717 if (LI.isAtomic()) {
2718 Assert(LI.getOrdering() != Release && LI.getOrdering() != AcquireRelease,
2719 "Load cannot have Release ordering", &LI);
2720 Assert(LI.getAlignment() != 0,
2721 "Atomic load must specify explicit alignment", &LI);
2722 if (!ElTy->isPointerTy()) {
2723 Assert(ElTy->isIntegerTy(), "atomic load operand must have integer type!",
2725 unsigned Size = ElTy->getPrimitiveSizeInBits();
2726 Assert(Size >= 8 && !(Size & (Size - 1)),
2727 "atomic load operand must be power-of-two byte-sized integer", &LI,
2731 Assert(LI.getSynchScope() == CrossThread,
2732 "Non-atomic load cannot have SynchronizationScope specified", &LI);
2735 visitInstruction(LI);
2738 void Verifier::visitStoreInst(StoreInst &SI) {
2739 PointerType *PTy = dyn_cast<PointerType>(SI.getOperand(1)->getType());
2740 Assert(PTy, "Store operand must be a pointer.", &SI);
2741 Type *ElTy = PTy->getElementType();
2742 Assert(ElTy == SI.getOperand(0)->getType(),
2743 "Stored value type does not match pointer operand type!", &SI, ElTy);
2744 Assert(SI.getAlignment() <= Value::MaximumAlignment,
2745 "huge alignment values are unsupported", &SI);
2746 if (SI.isAtomic()) {
2747 Assert(SI.getOrdering() != Acquire && SI.getOrdering() != AcquireRelease,
2748 "Store cannot have Acquire ordering", &SI);
2749 Assert(SI.getAlignment() != 0,
2750 "Atomic store must specify explicit alignment", &SI);
2751 if (!ElTy->isPointerTy()) {
2752 Assert(ElTy->isIntegerTy(),
2753 "atomic store operand must have integer type!", &SI, ElTy);
2754 unsigned Size = ElTy->getPrimitiveSizeInBits();
2755 Assert(Size >= 8 && !(Size & (Size - 1)),
2756 "atomic store operand must be power-of-two byte-sized integer",
2760 Assert(SI.getSynchScope() == CrossThread,
2761 "Non-atomic store cannot have SynchronizationScope specified", &SI);
2763 visitInstruction(SI);
2766 void Verifier::visitAllocaInst(AllocaInst &AI) {
2767 SmallPtrSet<Type*, 4> Visited;
2768 PointerType *PTy = AI.getType();
2769 Assert(PTy->getAddressSpace() == 0,
2770 "Allocation instruction pointer not in the generic address space!",
2772 Assert(AI.getAllocatedType()->isSized(&Visited),
2773 "Cannot allocate unsized type", &AI);
2774 Assert(AI.getArraySize()->getType()->isIntegerTy(),
2775 "Alloca array size must have integer type", &AI);
2776 Assert(AI.getAlignment() <= Value::MaximumAlignment,
2777 "huge alignment values are unsupported", &AI);
2779 visitInstruction(AI);
2782 void Verifier::visitAtomicCmpXchgInst(AtomicCmpXchgInst &CXI) {
2784 // FIXME: more conditions???
2785 Assert(CXI.getSuccessOrdering() != NotAtomic,
2786 "cmpxchg instructions must be atomic.", &CXI);
2787 Assert(CXI.getFailureOrdering() != NotAtomic,
2788 "cmpxchg instructions must be atomic.", &CXI);
2789 Assert(CXI.getSuccessOrdering() != Unordered,
2790 "cmpxchg instructions cannot be unordered.", &CXI);
2791 Assert(CXI.getFailureOrdering() != Unordered,
2792 "cmpxchg instructions cannot be unordered.", &CXI);
2793 Assert(CXI.getSuccessOrdering() >= CXI.getFailureOrdering(),
2794 "cmpxchg instructions be at least as constrained on success as fail",
2796 Assert(CXI.getFailureOrdering() != Release &&
2797 CXI.getFailureOrdering() != AcquireRelease,
2798 "cmpxchg failure ordering cannot include release semantics", &CXI);
2800 PointerType *PTy = dyn_cast<PointerType>(CXI.getOperand(0)->getType());
2801 Assert(PTy, "First cmpxchg operand must be a pointer.", &CXI);
2802 Type *ElTy = PTy->getElementType();
2803 Assert(ElTy->isIntegerTy(), "cmpxchg operand must have integer type!", &CXI,
2805 unsigned Size = ElTy->getPrimitiveSizeInBits();
2806 Assert(Size >= 8 && !(Size & (Size - 1)),
2807 "cmpxchg operand must be power-of-two byte-sized integer", &CXI, ElTy);
2808 Assert(ElTy == CXI.getOperand(1)->getType(),
2809 "Expected value type does not match pointer operand type!", &CXI,
2811 Assert(ElTy == CXI.getOperand(2)->getType(),
2812 "Stored value type does not match pointer operand type!", &CXI, ElTy);
2813 visitInstruction(CXI);
2816 void Verifier::visitAtomicRMWInst(AtomicRMWInst &RMWI) {
2817 Assert(RMWI.getOrdering() != NotAtomic,
2818 "atomicrmw instructions must be atomic.", &RMWI);
2819 Assert(RMWI.getOrdering() != Unordered,
2820 "atomicrmw instructions cannot be unordered.", &RMWI);
2821 PointerType *PTy = dyn_cast<PointerType>(RMWI.getOperand(0)->getType());
2822 Assert(PTy, "First atomicrmw operand must be a pointer.", &RMWI);
2823 Type *ElTy = PTy->getElementType();
2824 Assert(ElTy->isIntegerTy(), "atomicrmw operand must have integer type!",
2826 unsigned Size = ElTy->getPrimitiveSizeInBits();
2827 Assert(Size >= 8 && !(Size & (Size - 1)),
2828 "atomicrmw operand must be power-of-two byte-sized integer", &RMWI,
2830 Assert(ElTy == RMWI.getOperand(1)->getType(),
2831 "Argument value type does not match pointer operand type!", &RMWI,
2833 Assert(AtomicRMWInst::FIRST_BINOP <= RMWI.getOperation() &&
2834 RMWI.getOperation() <= AtomicRMWInst::LAST_BINOP,
2835 "Invalid binary operation!", &RMWI);
2836 visitInstruction(RMWI);
2839 void Verifier::visitFenceInst(FenceInst &FI) {
2840 const AtomicOrdering Ordering = FI.getOrdering();
2841 Assert(Ordering == Acquire || Ordering == Release ||
2842 Ordering == AcquireRelease || Ordering == SequentiallyConsistent,
2843 "fence instructions may only have "
2844 "acquire, release, acq_rel, or seq_cst ordering.",
2846 visitInstruction(FI);
2849 void Verifier::visitExtractValueInst(ExtractValueInst &EVI) {
2850 Assert(ExtractValueInst::getIndexedType(EVI.getAggregateOperand()->getType(),
2851 EVI.getIndices()) == EVI.getType(),
2852 "Invalid ExtractValueInst operands!", &EVI);
2854 visitInstruction(EVI);
2857 void Verifier::visitInsertValueInst(InsertValueInst &IVI) {
2858 Assert(ExtractValueInst::getIndexedType(IVI.getAggregateOperand()->getType(),
2859 IVI.getIndices()) ==
2860 IVI.getOperand(1)->getType(),
2861 "Invalid InsertValueInst operands!", &IVI);
2863 visitInstruction(IVI);
2866 void Verifier::visitEHPadPredecessors(Instruction &I) {
2867 assert(I.isEHPad());
2869 BasicBlock *BB = I.getParent();
2870 Function *F = BB->getParent();
2872 Assert(BB != &F->getEntryBlock(), "EH pad cannot be in entry block.", &I);
2874 if (auto *LPI = dyn_cast<LandingPadInst>(&I)) {
2875 // The landingpad instruction defines its parent as a landing pad block. The
2876 // landing pad block may be branched to only by the unwind edge of an
2878 for (BasicBlock *PredBB : predecessors(BB)) {
2879 const auto *II = dyn_cast<InvokeInst>(PredBB->getTerminator());
2880 Assert(II && II->getUnwindDest() == BB && II->getNormalDest() != BB,
2881 "Block containing LandingPadInst must be jumped to "
2882 "only by the unwind edge of an invoke.",
2887 if (auto *CPI = dyn_cast<CatchPadInst>(&I)) {
2888 if (!pred_empty(BB))
2889 Assert(BB->getUniquePredecessor() == CPI->getCatchSwitch()->getParent(),
2890 "Block containg CatchPadInst must be jumped to "
2891 "only by its catchswitch.",
2896 for (BasicBlock *PredBB : predecessors(BB)) {
2897 TerminatorInst *TI = PredBB->getTerminator();
2898 if (auto *II = dyn_cast<InvokeInst>(TI)) {
2899 Assert(II->getUnwindDest() == BB && II->getNormalDest() != BB,
2900 "EH pad must be jumped to via an unwind edge", &I, II);
2901 } else if (!isa<CleanupReturnInst>(TI) && !isa<CatchSwitchInst>(TI)) {
2902 Assert(false, "EH pad must be jumped to via an unwind edge", &I, TI);
2907 void Verifier::visitLandingPadInst(LandingPadInst &LPI) {
2908 // The landingpad instruction is ill-formed if it doesn't have any clauses and
2910 Assert(LPI.getNumClauses() > 0 || LPI.isCleanup(),
2911 "LandingPadInst needs at least one clause or to be a cleanup.", &LPI);
2913 visitEHPadPredecessors(LPI);
2915 if (!LandingPadResultTy)
2916 LandingPadResultTy = LPI.getType();
2918 Assert(LandingPadResultTy == LPI.getType(),
2919 "The landingpad instruction should have a consistent result type "
2920 "inside a function.",
2923 Function *F = LPI.getParent()->getParent();
2924 Assert(F->hasPersonalityFn(),
2925 "LandingPadInst needs to be in a function with a personality.", &LPI);
2927 // The landingpad instruction must be the first non-PHI instruction in the
2929 Assert(LPI.getParent()->getLandingPadInst() == &LPI,
2930 "LandingPadInst not the first non-PHI instruction in the block.",
2933 for (unsigned i = 0, e = LPI.getNumClauses(); i < e; ++i) {
2934 Constant *Clause = LPI.getClause(i);
2935 if (LPI.isCatch(i)) {
2936 Assert(isa<PointerType>(Clause->getType()),
2937 "Catch operand does not have pointer type!", &LPI);
2939 Assert(LPI.isFilter(i), "Clause is neither catch nor filter!", &LPI);
2940 Assert(isa<ConstantArray>(Clause) || isa<ConstantAggregateZero>(Clause),
2941 "Filter operand is not an array of constants!", &LPI);
2945 visitInstruction(LPI);
2948 void Verifier::visitCatchPadInst(CatchPadInst &CPI) {
2949 visitEHPadPredecessors(CPI);
2951 BasicBlock *BB = CPI.getParent();
2953 Function *F = BB->getParent();
2954 Assert(F->hasPersonalityFn(),
2955 "CatchPadInst needs to be in a function with a personality.", &CPI);
2957 Assert(isa<CatchSwitchInst>(CPI.getParentPad()),
2958 "CatchPadInst needs to be directly nested in a CatchSwitchInst.",
2959 CPI.getParentPad());
2961 // The catchpad instruction must be the first non-PHI instruction in the
2963 Assert(BB->getFirstNonPHI() == &CPI,
2964 "CatchPadInst not the first non-PHI instruction in the block.", &CPI);
2966 visitInstruction(CPI);
2969 void Verifier::visitCatchReturnInst(CatchReturnInst &CatchReturn) {
2970 Assert(isa<CatchPadInst>(CatchReturn.getOperand(0)),
2971 "CatchReturnInst needs to be provided a CatchPad", &CatchReturn,
2972 CatchReturn.getOperand(0));
2974 visitTerminatorInst(CatchReturn);
2977 void Verifier::visitCleanupPadInst(CleanupPadInst &CPI) {
2978 visitEHPadPredecessors(CPI);
2980 BasicBlock *BB = CPI.getParent();
2982 Function *F = BB->getParent();
2983 Assert(F->hasPersonalityFn(),
2984 "CleanupPadInst needs to be in a function with a personality.", &CPI);
2986 // The cleanuppad instruction must be the first non-PHI instruction in the
2988 Assert(BB->getFirstNonPHI() == &CPI,
2989 "CleanupPadInst not the first non-PHI instruction in the block.",
2992 auto *ParentPad = CPI.getParentPad();
2993 Assert(isa<CatchSwitchInst>(ParentPad) || isa<ConstantTokenNone>(ParentPad) ||
2994 isa<CleanupPadInst>(ParentPad) || isa<CatchPadInst>(ParentPad),
2995 "CleanupPadInst has an invalid parent.", &CPI);
2997 User *FirstUser = nullptr;
2998 BasicBlock *FirstUnwindDest = nullptr;
2999 for (User *U : CPI.users()) {
3000 BasicBlock *UnwindDest;
3001 if (CleanupReturnInst *CRI = dyn_cast<CleanupReturnInst>(U)) {
3002 UnwindDest = CRI->getUnwindDest();
3003 } else if (isa<CleanupPadInst>(U) || isa<CatchSwitchInst>(U)) {
3006 Assert(false, "bogus cleanuppad use", &CPI);
3011 FirstUnwindDest = UnwindDest;
3014 UnwindDest == FirstUnwindDest,
3015 "cleanupret instructions from the same cleanuppad must have the same "
3016 "unwind destination",
3021 visitInstruction(CPI);
3024 void Verifier::visitCatchSwitchInst(CatchSwitchInst &CatchSwitch) {
3025 visitEHPadPredecessors(CatchSwitch);
3027 BasicBlock *BB = CatchSwitch.getParent();
3029 Function *F = BB->getParent();
3030 Assert(F->hasPersonalityFn(),
3031 "CatchSwitchInst needs to be in a function with a personality.",
3034 // The catchswitch instruction must be the first non-PHI instruction in the
3036 Assert(BB->getFirstNonPHI() == &CatchSwitch,
3037 "CatchSwitchInst not the first non-PHI instruction in the block.",
3040 if (BasicBlock *UnwindDest = CatchSwitch.getUnwindDest()) {
3041 Instruction *I = UnwindDest->getFirstNonPHI();
3042 Assert(I->isEHPad() && !isa<LandingPadInst>(I),
3043 "CatchSwitchInst must unwind to an EH block which is not a "
3048 auto *ParentPad = CatchSwitch.getParentPad();
3049 Assert(isa<CatchSwitchInst>(ParentPad) || isa<ConstantTokenNone>(ParentPad) ||
3050 isa<CleanupPadInst>(ParentPad) || isa<CatchPadInst>(ParentPad),
3051 "CatchSwitchInst has an invalid parent.", ParentPad);
3053 visitTerminatorInst(CatchSwitch);
3056 void Verifier::visitCleanupReturnInst(CleanupReturnInst &CRI) {
3057 Assert(isa<CleanupPadInst>(CRI.getOperand(0)),
3058 "CleanupReturnInst needs to be provided a CleanupPad", &CRI,
3061 if (BasicBlock *UnwindDest = CRI.getUnwindDest()) {
3062 Instruction *I = UnwindDest->getFirstNonPHI();
3063 Assert(I->isEHPad() && !isa<LandingPadInst>(I),
3064 "CleanupReturnInst must unwind to an EH block which is not a "
3069 visitTerminatorInst(CRI);
3072 void Verifier::verifyDominatesUse(Instruction &I, unsigned i) {
3073 Instruction *Op = cast<Instruction>(I.getOperand(i));
3074 // If the we have an invalid invoke, don't try to compute the dominance.
3075 // We already reject it in the invoke specific checks and the dominance
3076 // computation doesn't handle multiple edges.
3077 if (InvokeInst *II = dyn_cast<InvokeInst>(Op)) {
3078 if (II->getNormalDest() == II->getUnwindDest())
3082 const Use &U = I.getOperandUse(i);
3083 Assert(InstsInThisBlock.count(Op) || DT.dominates(Op, U),
3084 "Instruction does not dominate all uses!", Op, &I);
3087 void Verifier::visitDereferenceableMetadata(Instruction& I, MDNode* MD) {
3088 Assert(I.getType()->isPointerTy(), "dereferenceable, dereferenceable_or_null "
3089 "apply only to pointer types", &I);
3090 Assert(isa<LoadInst>(I),
3091 "dereferenceable, dereferenceable_or_null apply only to load"
3092 " instructions, use attributes for calls or invokes", &I);
3093 Assert(MD->getNumOperands() == 1, "dereferenceable, dereferenceable_or_null "
3094 "take one operand!", &I);
3095 ConstantInt *CI = mdconst::dyn_extract<ConstantInt>(MD->getOperand(0));
3096 Assert(CI && CI->getType()->isIntegerTy(64), "dereferenceable, "
3097 "dereferenceable_or_null metadata value must be an i64!", &I);
3100 /// verifyInstruction - Verify that an instruction is well formed.
3102 void Verifier::visitInstruction(Instruction &I) {
3103 BasicBlock *BB = I.getParent();
3104 Assert(BB, "Instruction not embedded in basic block!", &I);
3106 if (!isa<PHINode>(I)) { // Check that non-phi nodes are not self referential
3107 for (User *U : I.users()) {
3108 Assert(U != (User *)&I || !DT.isReachableFromEntry(BB),
3109 "Only PHI nodes may reference their own value!", &I);
3113 // Check that void typed values don't have names
3114 Assert(!I.getType()->isVoidTy() || !I.hasName(),
3115 "Instruction has a name, but provides a void value!", &I);
3117 // Check that the return value of the instruction is either void or a legal
3119 Assert(I.getType()->isVoidTy() || I.getType()->isFirstClassType(),
3120 "Instruction returns a non-scalar type!", &I);
3122 // Check that the instruction doesn't produce metadata. Calls are already
3123 // checked against the callee type.
3124 Assert(!I.getType()->isMetadataTy() || isa<CallInst>(I) || isa<InvokeInst>(I),
3125 "Invalid use of metadata!", &I);
3127 // Check that all uses of the instruction, if they are instructions
3128 // themselves, actually have parent basic blocks. If the use is not an
3129 // instruction, it is an error!
3130 for (Use &U : I.uses()) {
3131 if (Instruction *Used = dyn_cast<Instruction>(U.getUser()))
3132 Assert(Used->getParent() != nullptr,
3133 "Instruction referencing"
3134 " instruction not embedded in a basic block!",
3137 CheckFailed("Use of instruction is not an instruction!", U);
3142 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
3143 Assert(I.getOperand(i) != nullptr, "Instruction has null operand!", &I);
3145 // Check to make sure that only first-class-values are operands to
3147 if (!I.getOperand(i)->getType()->isFirstClassType()) {
3148 Assert(0, "Instruction operands must be first-class values!", &I);
3151 if (Function *F = dyn_cast<Function>(I.getOperand(i))) {
3152 // Check to make sure that the "address of" an intrinsic function is never
3155 !F->isIntrinsic() ||
3156 i == (isa<CallInst>(I) ? e - 1 : isa<InvokeInst>(I) ? e - 3 : 0),
3157 "Cannot take the address of an intrinsic!", &I);
3159 !F->isIntrinsic() || isa<CallInst>(I) ||
3160 F->getIntrinsicID() == Intrinsic::donothing ||
3161 F->getIntrinsicID() == Intrinsic::experimental_patchpoint_void ||
3162 F->getIntrinsicID() == Intrinsic::experimental_patchpoint_i64 ||
3163 F->getIntrinsicID() == Intrinsic::experimental_gc_statepoint,
3164 "Cannot invoke an intrinsinc other than"
3165 " donothing or patchpoint",
3167 Assert(F->getParent() == M, "Referencing function in another module!",
3168 &I, M, F, F->getParent());
3169 } else if (BasicBlock *OpBB = dyn_cast<BasicBlock>(I.getOperand(i))) {
3170 Assert(OpBB->getParent() == BB->getParent(),
3171 "Referring to a basic block in another function!", &I);
3172 } else if (Argument *OpArg = dyn_cast<Argument>(I.getOperand(i))) {
3173 Assert(OpArg->getParent() == BB->getParent(),
3174 "Referring to an argument in another function!", &I);
3175 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(I.getOperand(i))) {
3176 Assert(GV->getParent() == M, "Referencing global in another module!", &I, M, GV, GV->getParent());
3177 } else if (isa<Instruction>(I.getOperand(i))) {
3178 verifyDominatesUse(I, i);
3179 } else if (isa<InlineAsm>(I.getOperand(i))) {
3180 Assert((i + 1 == e && isa<CallInst>(I)) ||
3181 (i + 3 == e && isa<InvokeInst>(I)),
3182 "Cannot take the address of an inline asm!", &I);
3183 } else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(I.getOperand(i))) {
3184 if (CE->getType()->isPtrOrPtrVectorTy()) {
3185 // If we have a ConstantExpr pointer, we need to see if it came from an
3186 // illegal bitcast (inttoptr <constant int> )
3187 visitConstantExprsRecursively(CE);
3192 if (MDNode *MD = I.getMetadata(LLVMContext::MD_fpmath)) {
3193 Assert(I.getType()->isFPOrFPVectorTy(),
3194 "fpmath requires a floating point result!", &I);
3195 Assert(MD->getNumOperands() == 1, "fpmath takes one operand!", &I);
3196 if (ConstantFP *CFP0 =
3197 mdconst::dyn_extract_or_null<ConstantFP>(MD->getOperand(0))) {
3198 APFloat Accuracy = CFP0->getValueAPF();
3199 Assert(Accuracy.isFiniteNonZero() && !Accuracy.isNegative(),
3200 "fpmath accuracy not a positive number!", &I);
3202 Assert(false, "invalid fpmath accuracy!", &I);
3206 if (MDNode *Range = I.getMetadata(LLVMContext::MD_range)) {
3207 Assert(isa<LoadInst>(I) || isa<CallInst>(I) || isa<InvokeInst>(I),
3208 "Ranges are only for loads, calls and invokes!", &I);
3209 visitRangeMetadata(I, Range, I.getType());
3212 if (I.getMetadata(LLVMContext::MD_nonnull)) {
3213 Assert(I.getType()->isPointerTy(), "nonnull applies only to pointer types",
3215 Assert(isa<LoadInst>(I),
3216 "nonnull applies only to load instructions, use attributes"
3217 " for calls or invokes",
3221 if (MDNode *MD = I.getMetadata(LLVMContext::MD_dereferenceable))
3222 visitDereferenceableMetadata(I, MD);
3224 if (MDNode *MD = I.getMetadata(LLVMContext::MD_dereferenceable_or_null))
3225 visitDereferenceableMetadata(I, MD);
3227 if (MDNode *AlignMD = I.getMetadata(LLVMContext::MD_align)) {
3228 Assert(I.getType()->isPointerTy(), "align applies only to pointer types",
3230 Assert(isa<LoadInst>(I), "align applies only to load instructions, "
3231 "use attributes for calls or invokes", &I);
3232 Assert(AlignMD->getNumOperands() == 1, "align takes one operand!", &I);
3233 ConstantInt *CI = mdconst::dyn_extract<ConstantInt>(AlignMD->getOperand(0));
3234 Assert(CI && CI->getType()->isIntegerTy(64),
3235 "align metadata value must be an i64!", &I);
3236 uint64_t Align = CI->getZExtValue();
3237 Assert(isPowerOf2_64(Align),
3238 "align metadata value must be a power of 2!", &I);
3239 Assert(Align <= Value::MaximumAlignment,
3240 "alignment is larger that implementation defined limit", &I);
3243 if (MDNode *N = I.getDebugLoc().getAsMDNode()) {
3244 Assert(isa<DILocation>(N), "invalid !dbg metadata attachment", &I, N);
3248 InstsInThisBlock.insert(&I);
3251 /// VerifyIntrinsicType - Verify that the specified type (which comes from an
3252 /// intrinsic argument or return value) matches the type constraints specified
3253 /// by the .td file (e.g. an "any integer" argument really is an integer).
3255 /// This return true on error but does not print a message.
3256 bool Verifier::VerifyIntrinsicType(Type *Ty,
3257 ArrayRef<Intrinsic::IITDescriptor> &Infos,
3258 SmallVectorImpl<Type*> &ArgTys) {
3259 using namespace Intrinsic;
3261 // If we ran out of descriptors, there are too many arguments.
3262 if (Infos.empty()) return true;
3263 IITDescriptor D = Infos.front();
3264 Infos = Infos.slice(1);
3267 case IITDescriptor::Void: return !Ty->isVoidTy();
3268 case IITDescriptor::VarArg: return true;
3269 case IITDescriptor::MMX: return !Ty->isX86_MMXTy();
3270 case IITDescriptor::Token: return !Ty->isTokenTy();
3271 case IITDescriptor::Metadata: return !Ty->isMetadataTy();
3272 case IITDescriptor::Half: return !Ty->isHalfTy();
3273 case IITDescriptor::Float: return !Ty->isFloatTy();
3274 case IITDescriptor::Double: return !Ty->isDoubleTy();
3275 case IITDescriptor::Integer: return !Ty->isIntegerTy(D.Integer_Width);
3276 case IITDescriptor::Vector: {
3277 VectorType *VT = dyn_cast<VectorType>(Ty);
3278 return !VT || VT->getNumElements() != D.Vector_Width ||
3279 VerifyIntrinsicType(VT->getElementType(), Infos, ArgTys);
3281 case IITDescriptor::Pointer: {
3282 PointerType *PT = dyn_cast<PointerType>(Ty);
3283 return !PT || PT->getAddressSpace() != D.Pointer_AddressSpace ||
3284 VerifyIntrinsicType(PT->getElementType(), Infos, ArgTys);
3287 case IITDescriptor::Struct: {
3288 StructType *ST = dyn_cast<StructType>(Ty);
3289 if (!ST || ST->getNumElements() != D.Struct_NumElements)
3292 for (unsigned i = 0, e = D.Struct_NumElements; i != e; ++i)
3293 if (VerifyIntrinsicType(ST->getElementType(i), Infos, ArgTys))
3298 case IITDescriptor::Argument:
3299 // Two cases here - If this is the second occurrence of an argument, verify
3300 // that the later instance matches the previous instance.
3301 if (D.getArgumentNumber() < ArgTys.size())
3302 return Ty != ArgTys[D.getArgumentNumber()];
3304 // Otherwise, if this is the first instance of an argument, record it and
3305 // verify the "Any" kind.
3306 assert(D.getArgumentNumber() == ArgTys.size() && "Table consistency error");
3307 ArgTys.push_back(Ty);
3309 switch (D.getArgumentKind()) {
3310 case IITDescriptor::AK_Any: return false; // Success
3311 case IITDescriptor::AK_AnyInteger: return !Ty->isIntOrIntVectorTy();
3312 case IITDescriptor::AK_AnyFloat: return !Ty->isFPOrFPVectorTy();
3313 case IITDescriptor::AK_AnyVector: return !isa<VectorType>(Ty);
3314 case IITDescriptor::AK_AnyPointer: return !isa<PointerType>(Ty);
3316 llvm_unreachable("all argument kinds not covered");
3318 case IITDescriptor::ExtendArgument: {
3319 // This may only be used when referring to a previous vector argument.
3320 if (D.getArgumentNumber() >= ArgTys.size())
3323 Type *NewTy = ArgTys[D.getArgumentNumber()];
3324 if (VectorType *VTy = dyn_cast<VectorType>(NewTy))
3325 NewTy = VectorType::getExtendedElementVectorType(VTy);
3326 else if (IntegerType *ITy = dyn_cast<IntegerType>(NewTy))
3327 NewTy = IntegerType::get(ITy->getContext(), 2 * ITy->getBitWidth());
3333 case IITDescriptor::TruncArgument: {
3334 // This may only be used when referring to a previous vector argument.
3335 if (D.getArgumentNumber() >= ArgTys.size())
3338 Type *NewTy = ArgTys[D.getArgumentNumber()];
3339 if (VectorType *VTy = dyn_cast<VectorType>(NewTy))
3340 NewTy = VectorType::getTruncatedElementVectorType(VTy);
3341 else if (IntegerType *ITy = dyn_cast<IntegerType>(NewTy))
3342 NewTy = IntegerType::get(ITy->getContext(), ITy->getBitWidth() / 2);
3348 case IITDescriptor::HalfVecArgument:
3349 // This may only be used when referring to a previous vector argument.
3350 return D.getArgumentNumber() >= ArgTys.size() ||
3351 !isa<VectorType>(ArgTys[D.getArgumentNumber()]) ||
3352 VectorType::getHalfElementsVectorType(
3353 cast<VectorType>(ArgTys[D.getArgumentNumber()])) != Ty;
3354 case IITDescriptor::SameVecWidthArgument: {
3355 if (D.getArgumentNumber() >= ArgTys.size())
3357 VectorType * ReferenceType =
3358 dyn_cast<VectorType>(ArgTys[D.getArgumentNumber()]);
3359 VectorType *ThisArgType = dyn_cast<VectorType>(Ty);
3360 if (!ThisArgType || !ReferenceType ||
3361 (ReferenceType->getVectorNumElements() !=
3362 ThisArgType->getVectorNumElements()))
3364 return VerifyIntrinsicType(ThisArgType->getVectorElementType(),
3367 case IITDescriptor::PtrToArgument: {
3368 if (D.getArgumentNumber() >= ArgTys.size())
3370 Type * ReferenceType = ArgTys[D.getArgumentNumber()];
3371 PointerType *ThisArgType = dyn_cast<PointerType>(Ty);
3372 return (!ThisArgType || ThisArgType->getElementType() != ReferenceType);
3374 case IITDescriptor::VecOfPtrsToElt: {
3375 if (D.getArgumentNumber() >= ArgTys.size())
3377 VectorType * ReferenceType =
3378 dyn_cast<VectorType> (ArgTys[D.getArgumentNumber()]);
3379 VectorType *ThisArgVecTy = dyn_cast<VectorType>(Ty);
3380 if (!ThisArgVecTy || !ReferenceType ||
3381 (ReferenceType->getVectorNumElements() !=
3382 ThisArgVecTy->getVectorNumElements()))
3384 PointerType *ThisArgEltTy =
3385 dyn_cast<PointerType>(ThisArgVecTy->getVectorElementType());
3388 return ThisArgEltTy->getElementType() !=
3389 ReferenceType->getVectorElementType();
3392 llvm_unreachable("unhandled");
3395 /// \brief Verify if the intrinsic has variable arguments.
3396 /// This method is intended to be called after all the fixed arguments have been
3399 /// This method returns true on error and does not print an error message.
3401 Verifier::VerifyIntrinsicIsVarArg(bool isVarArg,
3402 ArrayRef<Intrinsic::IITDescriptor> &Infos) {
3403 using namespace Intrinsic;
3405 // If there are no descriptors left, then it can't be a vararg.
3409 // There should be only one descriptor remaining at this point.
3410 if (Infos.size() != 1)
3413 // Check and verify the descriptor.
3414 IITDescriptor D = Infos.front();
3415 Infos = Infos.slice(1);
3416 if (D.Kind == IITDescriptor::VarArg)
3422 /// Allow intrinsics to be verified in different ways.
3423 void Verifier::visitIntrinsicCallSite(Intrinsic::ID ID, CallSite CS) {
3424 Function *IF = CS.getCalledFunction();
3425 Assert(IF->isDeclaration(), "Intrinsic functions should never be defined!",
3428 // Verify that the intrinsic prototype lines up with what the .td files
3430 FunctionType *IFTy = IF->getFunctionType();
3431 bool IsVarArg = IFTy->isVarArg();
3433 SmallVector<Intrinsic::IITDescriptor, 8> Table;
3434 getIntrinsicInfoTableEntries(ID, Table);
3435 ArrayRef<Intrinsic::IITDescriptor> TableRef = Table;
3437 SmallVector<Type *, 4> ArgTys;
3438 Assert(!VerifyIntrinsicType(IFTy->getReturnType(), TableRef, ArgTys),
3439 "Intrinsic has incorrect return type!", IF);
3440 for (unsigned i = 0, e = IFTy->getNumParams(); i != e; ++i)
3441 Assert(!VerifyIntrinsicType(IFTy->getParamType(i), TableRef, ArgTys),
3442 "Intrinsic has incorrect argument type!", IF);
3444 // Verify if the intrinsic call matches the vararg property.
3446 Assert(!VerifyIntrinsicIsVarArg(IsVarArg, TableRef),
3447 "Intrinsic was not defined with variable arguments!", IF);
3449 Assert(!VerifyIntrinsicIsVarArg(IsVarArg, TableRef),
3450 "Callsite was not defined with variable arguments!", IF);
3452 // All descriptors should be absorbed by now.
3453 Assert(TableRef.empty(), "Intrinsic has too few arguments!", IF);
3455 // Now that we have the intrinsic ID and the actual argument types (and we
3456 // know they are legal for the intrinsic!) get the intrinsic name through the
3457 // usual means. This allows us to verify the mangling of argument types into
3459 const std::string ExpectedName = Intrinsic::getName(ID, ArgTys);
3460 Assert(ExpectedName == IF->getName(),
3461 "Intrinsic name not mangled correctly for type arguments! "
3466 // If the intrinsic takes MDNode arguments, verify that they are either global
3467 // or are local to *this* function.
3468 for (Value *V : CS.args())
3469 if (auto *MD = dyn_cast<MetadataAsValue>(V))
3470 visitMetadataAsValue(*MD, CS.getCaller());
3475 case Intrinsic::ctlz: // llvm.ctlz
3476 case Intrinsic::cttz: // llvm.cttz
3477 Assert(isa<ConstantInt>(CS.getArgOperand(1)),
3478 "is_zero_undef argument of bit counting intrinsics must be a "
3482 case Intrinsic::dbg_declare: // llvm.dbg.declare
3483 Assert(isa<MetadataAsValue>(CS.getArgOperand(0)),
3484 "invalid llvm.dbg.declare intrinsic call 1", CS);
3485 visitDbgIntrinsic("declare", cast<DbgDeclareInst>(*CS.getInstruction()));
3487 case Intrinsic::dbg_value: // llvm.dbg.value
3488 visitDbgIntrinsic("value", cast<DbgValueInst>(*CS.getInstruction()));
3490 case Intrinsic::memcpy:
3491 case Intrinsic::memmove:
3492 case Intrinsic::memset: {
3493 ConstantInt *AlignCI = dyn_cast<ConstantInt>(CS.getArgOperand(3));
3495 "alignment argument of memory intrinsics must be a constant int",
3497 const APInt &AlignVal = AlignCI->getValue();
3498 Assert(AlignCI->isZero() || AlignVal.isPowerOf2(),
3499 "alignment argument of memory intrinsics must be a power of 2", CS);
3500 Assert(isa<ConstantInt>(CS.getArgOperand(4)),
3501 "isvolatile argument of memory intrinsics must be a constant int",
3505 case Intrinsic::gcroot:
3506 case Intrinsic::gcwrite:
3507 case Intrinsic::gcread:
3508 if (ID == Intrinsic::gcroot) {
3510 dyn_cast<AllocaInst>(CS.getArgOperand(0)->stripPointerCasts());
3511 Assert(AI, "llvm.gcroot parameter #1 must be an alloca.", CS);
3512 Assert(isa<Constant>(CS.getArgOperand(1)),
3513 "llvm.gcroot parameter #2 must be a constant.", CS);
3514 if (!AI->getAllocatedType()->isPointerTy()) {
3515 Assert(!isa<ConstantPointerNull>(CS.getArgOperand(1)),
3516 "llvm.gcroot parameter #1 must either be a pointer alloca, "
3517 "or argument #2 must be a non-null constant.",
3522 Assert(CS.getParent()->getParent()->hasGC(),
3523 "Enclosing function does not use GC.", CS);
3525 case Intrinsic::init_trampoline:
3526 Assert(isa<Function>(CS.getArgOperand(1)->stripPointerCasts()),
3527 "llvm.init_trampoline parameter #2 must resolve to a function.",
3530 case Intrinsic::prefetch:
3531 Assert(isa<ConstantInt>(CS.getArgOperand(1)) &&
3532 isa<ConstantInt>(CS.getArgOperand(2)) &&
3533 cast<ConstantInt>(CS.getArgOperand(1))->getZExtValue() < 2 &&
3534 cast<ConstantInt>(CS.getArgOperand(2))->getZExtValue() < 4,
3535 "invalid arguments to llvm.prefetch", CS);
3537 case Intrinsic::stackprotector:
3538 Assert(isa<AllocaInst>(CS.getArgOperand(1)->stripPointerCasts()),
3539 "llvm.stackprotector parameter #2 must resolve to an alloca.", CS);
3541 case Intrinsic::lifetime_start:
3542 case Intrinsic::lifetime_end:
3543 case Intrinsic::invariant_start:
3544 Assert(isa<ConstantInt>(CS.getArgOperand(0)),
3545 "size argument of memory use markers must be a constant integer",
3548 case Intrinsic::invariant_end:
3549 Assert(isa<ConstantInt>(CS.getArgOperand(1)),
3550 "llvm.invariant.end parameter #2 must be a constant integer", CS);
3553 case Intrinsic::localescape: {
3554 BasicBlock *BB = CS.getParent();
3555 Assert(BB == &BB->getParent()->front(),
3556 "llvm.localescape used outside of entry block", CS);
3557 Assert(!SawFrameEscape,
3558 "multiple calls to llvm.localescape in one function", CS);
3559 for (Value *Arg : CS.args()) {
3560 if (isa<ConstantPointerNull>(Arg))
3561 continue; // Null values are allowed as placeholders.
3562 auto *AI = dyn_cast<AllocaInst>(Arg->stripPointerCasts());
3563 Assert(AI && AI->isStaticAlloca(),
3564 "llvm.localescape only accepts static allocas", CS);
3566 FrameEscapeInfo[BB->getParent()].first = CS.getNumArgOperands();
3567 SawFrameEscape = true;
3570 case Intrinsic::localrecover: {
3571 Value *FnArg = CS.getArgOperand(0)->stripPointerCasts();
3572 Function *Fn = dyn_cast<Function>(FnArg);
3573 Assert(Fn && !Fn->isDeclaration(),
3574 "llvm.localrecover first "
3575 "argument must be function defined in this module",
3577 auto *IdxArg = dyn_cast<ConstantInt>(CS.getArgOperand(2));
3578 Assert(IdxArg, "idx argument of llvm.localrecover must be a constant int",
3580 auto &Entry = FrameEscapeInfo[Fn];
3581 Entry.second = unsigned(
3582 std::max(uint64_t(Entry.second), IdxArg->getLimitedValue(~0U) + 1));
3586 case Intrinsic::experimental_gc_statepoint:
3587 Assert(!CS.isInlineAsm(),
3588 "gc.statepoint support for inline assembly unimplemented", CS);
3589 Assert(CS.getParent()->getParent()->hasGC(),
3590 "Enclosing function does not use GC.", CS);
3592 VerifyStatepoint(CS);
3594 case Intrinsic::experimental_gc_result_int:
3595 case Intrinsic::experimental_gc_result_float:
3596 case Intrinsic::experimental_gc_result_ptr:
3597 case Intrinsic::experimental_gc_result: {
3598 Assert(CS.getParent()->getParent()->hasGC(),
3599 "Enclosing function does not use GC.", CS);
3600 // Are we tied to a statepoint properly?
3601 CallSite StatepointCS(CS.getArgOperand(0));
3602 const Function *StatepointFn =
3603 StatepointCS.getInstruction() ? StatepointCS.getCalledFunction() : nullptr;
3604 Assert(StatepointFn && StatepointFn->isDeclaration() &&
3605 StatepointFn->getIntrinsicID() ==
3606 Intrinsic::experimental_gc_statepoint,
3607 "gc.result operand #1 must be from a statepoint", CS,
3608 CS.getArgOperand(0));
3610 // Assert that result type matches wrapped callee.
3611 const Value *Target = StatepointCS.getArgument(2);
3612 auto *PT = cast<PointerType>(Target->getType());
3613 auto *TargetFuncType = cast<FunctionType>(PT->getElementType());
3614 Assert(CS.getType() == TargetFuncType->getReturnType(),
3615 "gc.result result type does not match wrapped callee", CS);
3618 case Intrinsic::experimental_gc_relocate: {
3619 Assert(CS.getNumArgOperands() == 3, "wrong number of arguments", CS);
3621 // Check that this relocate is correctly tied to the statepoint
3623 // This is case for relocate on the unwinding path of an invoke statepoint
3624 if (ExtractValueInst *ExtractValue =
3625 dyn_cast<ExtractValueInst>(CS.getArgOperand(0))) {
3626 Assert(isa<LandingPadInst>(ExtractValue->getAggregateOperand()),
3627 "gc relocate on unwind path incorrectly linked to the statepoint",
3630 const BasicBlock *InvokeBB =
3631 ExtractValue->getParent()->getUniquePredecessor();
3633 // Landingpad relocates should have only one predecessor with invoke
3634 // statepoint terminator
3635 Assert(InvokeBB, "safepoints should have unique landingpads",
3636 ExtractValue->getParent());
3637 Assert(InvokeBB->getTerminator(), "safepoint block should be well formed",
3639 Assert(isStatepoint(InvokeBB->getTerminator()),
3640 "gc relocate should be linked to a statepoint", InvokeBB);
3643 // In all other cases relocate should be tied to the statepoint directly.
3644 // This covers relocates on a normal return path of invoke statepoint and
3645 // relocates of a call statepoint
3646 auto Token = CS.getArgOperand(0);
3647 Assert(isa<Instruction>(Token) && isStatepoint(cast<Instruction>(Token)),
3648 "gc relocate is incorrectly tied to the statepoint", CS, Token);
3651 // Verify rest of the relocate arguments
3653 GCRelocateOperands Ops(CS);
3654 ImmutableCallSite StatepointCS(Ops.getStatepoint());
3656 // Both the base and derived must be piped through the safepoint
3657 Value* Base = CS.getArgOperand(1);
3658 Assert(isa<ConstantInt>(Base),
3659 "gc.relocate operand #2 must be integer offset", CS);
3661 Value* Derived = CS.getArgOperand(2);
3662 Assert(isa<ConstantInt>(Derived),
3663 "gc.relocate operand #3 must be integer offset", CS);
3665 const int BaseIndex = cast<ConstantInt>(Base)->getZExtValue();
3666 const int DerivedIndex = cast<ConstantInt>(Derived)->getZExtValue();
3668 Assert(0 <= BaseIndex && BaseIndex < (int)StatepointCS.arg_size(),
3669 "gc.relocate: statepoint base index out of bounds", CS);
3670 Assert(0 <= DerivedIndex && DerivedIndex < (int)StatepointCS.arg_size(),
3671 "gc.relocate: statepoint derived index out of bounds", CS);
3673 // Check that BaseIndex and DerivedIndex fall within the 'gc parameters'
3674 // section of the statepoint's argument
3675 Assert(StatepointCS.arg_size() > 0,
3676 "gc.statepoint: insufficient arguments");
3677 Assert(isa<ConstantInt>(StatepointCS.getArgument(3)),
3678 "gc.statement: number of call arguments must be constant integer");
3679 const unsigned NumCallArgs =
3680 cast<ConstantInt>(StatepointCS.getArgument(3))->getZExtValue();
3681 Assert(StatepointCS.arg_size() > NumCallArgs + 5,
3682 "gc.statepoint: mismatch in number of call arguments");
3683 Assert(isa<ConstantInt>(StatepointCS.getArgument(NumCallArgs + 5)),
3684 "gc.statepoint: number of transition arguments must be "
3685 "a constant integer");
3686 const int NumTransitionArgs =
3687 cast<ConstantInt>(StatepointCS.getArgument(NumCallArgs + 5))
3689 const int DeoptArgsStart = 4 + NumCallArgs + 1 + NumTransitionArgs + 1;
3690 Assert(isa<ConstantInt>(StatepointCS.getArgument(DeoptArgsStart)),
3691 "gc.statepoint: number of deoptimization arguments must be "
3692 "a constant integer");
3693 const int NumDeoptArgs =
3694 cast<ConstantInt>(StatepointCS.getArgument(DeoptArgsStart))->getZExtValue();
3695 const int GCParamArgsStart = DeoptArgsStart + 1 + NumDeoptArgs;
3696 const int GCParamArgsEnd = StatepointCS.arg_size();
3697 Assert(GCParamArgsStart <= BaseIndex && BaseIndex < GCParamArgsEnd,
3698 "gc.relocate: statepoint base index doesn't fall within the "
3699 "'gc parameters' section of the statepoint call",
3701 Assert(GCParamArgsStart <= DerivedIndex && DerivedIndex < GCParamArgsEnd,
3702 "gc.relocate: statepoint derived index doesn't fall within the "
3703 "'gc parameters' section of the statepoint call",
3706 // Relocated value must be a pointer type, but gc_relocate does not need to return the
3707 // same pointer type as the relocated pointer. It can be casted to the correct type later
3708 // if it's desired. However, they must have the same address space.
3709 GCRelocateOperands Operands(CS);
3710 Assert(Operands.getDerivedPtr()->getType()->isPointerTy(),
3711 "gc.relocate: relocated value must be a gc pointer", CS);
3713 // gc_relocate return type must be a pointer type, and is verified earlier in
3714 // VerifyIntrinsicType().
3715 Assert(cast<PointerType>(CS.getType())->getAddressSpace() ==
3716 cast<PointerType>(Operands.getDerivedPtr()->getType())->getAddressSpace(),
3717 "gc.relocate: relocating a pointer shouldn't change its address space", CS);
3720 case Intrinsic::eh_exceptioncode:
3721 case Intrinsic::eh_exceptionpointer: {
3722 Assert(isa<CatchPadInst>(CS.getArgOperand(0)),
3723 "eh.exceptionpointer argument must be a catchpad", CS);
3729 /// \brief Carefully grab the subprogram from a local scope.
3731 /// This carefully grabs the subprogram from a local scope, avoiding the
3732 /// built-in assertions that would typically fire.
3733 static DISubprogram *getSubprogram(Metadata *LocalScope) {
3737 if (auto *SP = dyn_cast<DISubprogram>(LocalScope))
3740 if (auto *LB = dyn_cast<DILexicalBlockBase>(LocalScope))
3741 return getSubprogram(LB->getRawScope());
3743 // Just return null; broken scope chains are checked elsewhere.
3744 assert(!isa<DILocalScope>(LocalScope) && "Unknown type of local scope");
3748 template <class DbgIntrinsicTy>
3749 void Verifier::visitDbgIntrinsic(StringRef Kind, DbgIntrinsicTy &DII) {
3750 auto *MD = cast<MetadataAsValue>(DII.getArgOperand(0))->getMetadata();
3751 Assert(isa<ValueAsMetadata>(MD) ||
3752 (isa<MDNode>(MD) && !cast<MDNode>(MD)->getNumOperands()),
3753 "invalid llvm.dbg." + Kind + " intrinsic address/value", &DII, MD);
3754 Assert(isa<DILocalVariable>(DII.getRawVariable()),
3755 "invalid llvm.dbg." + Kind + " intrinsic variable", &DII,
3756 DII.getRawVariable());
3757 Assert(isa<DIExpression>(DII.getRawExpression()),
3758 "invalid llvm.dbg." + Kind + " intrinsic expression", &DII,
3759 DII.getRawExpression());
3761 // Ignore broken !dbg attachments; they're checked elsewhere.
3762 if (MDNode *N = DII.getDebugLoc().getAsMDNode())
3763 if (!isa<DILocation>(N))
3766 BasicBlock *BB = DII.getParent();
3767 Function *F = BB ? BB->getParent() : nullptr;
3769 // The scopes for variables and !dbg attachments must agree.
3770 DILocalVariable *Var = DII.getVariable();
3771 DILocation *Loc = DII.getDebugLoc();
3772 Assert(Loc, "llvm.dbg." + Kind + " intrinsic requires a !dbg attachment",
3775 DISubprogram *VarSP = getSubprogram(Var->getRawScope());
3776 DISubprogram *LocSP = getSubprogram(Loc->getRawScope());
3777 if (!VarSP || !LocSP)
3778 return; // Broken scope chains are checked elsewhere.
3780 Assert(VarSP == LocSP, "mismatched subprogram between llvm.dbg." + Kind +
3781 " variable and !dbg attachment",
3782 &DII, BB, F, Var, Var->getScope()->getSubprogram(), Loc,
3783 Loc->getScope()->getSubprogram());
3786 template <class MapTy>
3787 static uint64_t getVariableSize(const DILocalVariable &V, const MapTy &Map) {
3788 // Be careful of broken types (checked elsewhere).
3789 const Metadata *RawType = V.getRawType();
3791 // Try to get the size directly.
3792 if (auto *T = dyn_cast<DIType>(RawType))
3793 if (uint64_t Size = T->getSizeInBits())
3796 if (auto *DT = dyn_cast<DIDerivedType>(RawType)) {
3797 // Look at the base type.
3798 RawType = DT->getRawBaseType();
3802 if (auto *S = dyn_cast<MDString>(RawType)) {
3803 // Don't error on missing types (checked elsewhere).
3804 RawType = Map.lookup(S);
3808 // Missing type or size.
3816 template <class MapTy>
3817 void Verifier::verifyBitPieceExpression(const DbgInfoIntrinsic &I,
3818 const MapTy &TypeRefs) {
3821 if (auto *DVI = dyn_cast<DbgValueInst>(&I)) {
3822 V = dyn_cast_or_null<DILocalVariable>(DVI->getRawVariable());
3823 E = dyn_cast_or_null<DIExpression>(DVI->getRawExpression());
3825 auto *DDI = cast<DbgDeclareInst>(&I);
3826 V = dyn_cast_or_null<DILocalVariable>(DDI->getRawVariable());
3827 E = dyn_cast_or_null<DIExpression>(DDI->getRawExpression());
3830 // We don't know whether this intrinsic verified correctly.
3831 if (!V || !E || !E->isValid())
3834 // Nothing to do if this isn't a bit piece expression.
3835 if (!E->isBitPiece())
3838 // The frontend helps out GDB by emitting the members of local anonymous
3839 // unions as artificial local variables with shared storage. When SROA splits
3840 // the storage for artificial local variables that are smaller than the entire
3841 // union, the overhang piece will be outside of the allotted space for the
3842 // variable and this check fails.
3843 // FIXME: Remove this check as soon as clang stops doing this; it hides bugs.
3844 if (V->isArtificial())
3847 // If there's no size, the type is broken, but that should be checked
3849 uint64_t VarSize = getVariableSize(*V, TypeRefs);
3853 unsigned PieceSize = E->getBitPieceSize();
3854 unsigned PieceOffset = E->getBitPieceOffset();
3855 Assert(PieceSize + PieceOffset <= VarSize,
3856 "piece is larger than or outside of variable", &I, V, E);
3857 Assert(PieceSize != VarSize, "piece covers entire variable", &I, V, E);
3860 void Verifier::visitUnresolvedTypeRef(const MDString *S, const MDNode *N) {
3861 // This is in its own function so we get an error for each bad type ref (not
3863 Assert(false, "unresolved type ref", S, N);
3866 void Verifier::verifyTypeRefs() {
3867 auto *CUs = M->getNamedMetadata("llvm.dbg.cu");
3871 // Visit all the compile units again to map the type references.
3872 SmallDenseMap<const MDString *, const DIType *, 32> TypeRefs;
3873 for (auto *CU : CUs->operands())
3874 if (auto Ts = cast<DICompileUnit>(CU)->getRetainedTypes())
3875 for (DIType *Op : Ts)
3876 if (auto *T = dyn_cast_or_null<DICompositeType>(Op))
3877 if (auto *S = T->getRawIdentifier()) {
3878 UnresolvedTypeRefs.erase(S);
3879 TypeRefs.insert(std::make_pair(S, T));
3882 // Verify debug info intrinsic bit piece expressions. This needs a second
3883 // pass through the intructions, since we haven't built TypeRefs yet when
3884 // verifying functions, and simply queuing the DbgInfoIntrinsics to evaluate
3885 // later/now would queue up some that could be later deleted.
3886 for (const Function &F : *M)
3887 for (const BasicBlock &BB : F)
3888 for (const Instruction &I : BB)
3889 if (auto *DII = dyn_cast<DbgInfoIntrinsic>(&I))
3890 verifyBitPieceExpression(*DII, TypeRefs);
3892 // Return early if all typerefs were resolved.
3893 if (UnresolvedTypeRefs.empty())
3896 // Sort the unresolved references by name so the output is deterministic.
3897 typedef std::pair<const MDString *, const MDNode *> TypeRef;
3898 SmallVector<TypeRef, 32> Unresolved(UnresolvedTypeRefs.begin(),
3899 UnresolvedTypeRefs.end());
3900 std::sort(Unresolved.begin(), Unresolved.end(),
3901 [](const TypeRef &LHS, const TypeRef &RHS) {
3902 return LHS.first->getString() < RHS.first->getString();
3905 // Visit the unresolved refs (printing out the errors).
3906 for (const TypeRef &TR : Unresolved)
3907 visitUnresolvedTypeRef(TR.first, TR.second);
3910 //===----------------------------------------------------------------------===//
3911 // Implement the public interfaces to this file...
3912 //===----------------------------------------------------------------------===//
3914 bool llvm::verifyFunction(const Function &f, raw_ostream *OS) {
3915 Function &F = const_cast<Function &>(f);
3916 assert(!F.isDeclaration() && "Cannot verify external functions");
3918 raw_null_ostream NullStr;
3919 Verifier V(OS ? *OS : NullStr);
3921 // Note that this function's return value is inverted from what you would
3922 // expect of a function called "verify".
3923 return !V.verify(F);
3926 bool llvm::verifyModule(const Module &M, raw_ostream *OS) {
3927 raw_null_ostream NullStr;
3928 Verifier V(OS ? *OS : NullStr);
3930 bool Broken = false;
3931 for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I)
3932 if (!I->isDeclaration() && !I->isMaterializable())
3933 Broken |= !V.verify(*I);
3935 // Note that this function's return value is inverted from what you would
3936 // expect of a function called "verify".
3937 return !V.verify(M) || Broken;
3941 struct VerifierLegacyPass : public FunctionPass {
3947 VerifierLegacyPass() : FunctionPass(ID), V(dbgs()), FatalErrors(true) {
3948 initializeVerifierLegacyPassPass(*PassRegistry::getPassRegistry());
3950 explicit VerifierLegacyPass(bool FatalErrors)
3951 : FunctionPass(ID), V(dbgs()), FatalErrors(FatalErrors) {
3952 initializeVerifierLegacyPassPass(*PassRegistry::getPassRegistry());
3955 bool runOnFunction(Function &F) override {
3956 if (!V.verify(F) && FatalErrors)
3957 report_fatal_error("Broken function found, compilation aborted!");
3962 bool doFinalization(Module &M) override {
3963 if (!V.verify(M) && FatalErrors)
3964 report_fatal_error("Broken module found, compilation aborted!");
3969 void getAnalysisUsage(AnalysisUsage &AU) const override {
3970 AU.setPreservesAll();
3975 char VerifierLegacyPass::ID = 0;
3976 INITIALIZE_PASS(VerifierLegacyPass, "verify", "Module Verifier", false, false)
3978 FunctionPass *llvm::createVerifierPass(bool FatalErrors) {
3979 return new VerifierLegacyPass(FatalErrors);
3982 PreservedAnalyses VerifierPass::run(Module &M) {
3983 if (verifyModule(M, &dbgs()) && FatalErrors)
3984 report_fatal_error("Broken module found, compilation aborted!");
3986 return PreservedAnalyses::all();
3989 PreservedAnalyses VerifierPass::run(Function &F) {
3990 if (verifyFunction(F, &dbgs()) && FatalErrors)
3991 report_fatal_error("Broken function found, compilation aborted!");
3993 return PreservedAnalyses::all();