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 // * All landingpad instructions must use the same personality function with
44 // * All other things that are tested by asserts spread about the code...
46 //===----------------------------------------------------------------------===//
48 #include "llvm/IR/Verifier.h"
49 #include "llvm/ADT/STLExtras.h"
50 #include "llvm/ADT/SetVector.h"
51 #include "llvm/ADT/SmallPtrSet.h"
52 #include "llvm/ADT/SmallVector.h"
53 #include "llvm/ADT/StringExtras.h"
54 #include "llvm/IR/CFG.h"
55 #include "llvm/IR/CallSite.h"
56 #include "llvm/IR/CallingConv.h"
57 #include "llvm/IR/ConstantRange.h"
58 #include "llvm/IR/Constants.h"
59 #include "llvm/IR/DataLayout.h"
60 #include "llvm/IR/DebugInfo.h"
61 #include "llvm/IR/DerivedTypes.h"
62 #include "llvm/IR/Dominators.h"
63 #include "llvm/IR/InlineAsm.h"
64 #include "llvm/IR/InstIterator.h"
65 #include "llvm/IR/InstVisitor.h"
66 #include "llvm/IR/IntrinsicInst.h"
67 #include "llvm/IR/LLVMContext.h"
68 #include "llvm/IR/Metadata.h"
69 #include "llvm/IR/Module.h"
70 #include "llvm/IR/PassManager.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(false));
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) {}
93 void WriteValue(const Value *V) {
96 if (isa<Instruction>(V)) {
99 V->printAsOperand(OS, true, M);
104 void WriteType(Type *T) {
110 // CheckFailed - A check failed, so print out the condition and the message
111 // that failed. This provides a nice place to put a breakpoint if you want
112 // to see why something is not correct.
113 void CheckFailed(const Twine &Message, const Value *V1 = nullptr,
114 const Value *V2 = nullptr, const Value *V3 = nullptr,
115 const Value *V4 = nullptr) {
116 OS << Message.str() << "\n";
124 void CheckFailed(const Twine &Message, const Value *V1, Type *T2,
125 const Value *V3 = nullptr) {
126 OS << Message.str() << "\n";
133 void CheckFailed(const Twine &Message, Type *T1, Type *T2 = nullptr,
134 Type *T3 = nullptr) {
135 OS << Message.str() << "\n";
142 class Verifier : public InstVisitor<Verifier>, VerifierSupport {
143 friend class InstVisitor<Verifier>;
145 LLVMContext *Context;
146 const DataLayout *DL;
149 /// \brief When verifying a basic block, keep track of all of the
150 /// instructions we have seen so far.
152 /// This allows us to do efficient dominance checks for the case when an
153 /// instruction has an operand that is an instruction in the same block.
154 SmallPtrSet<Instruction *, 16> InstsInThisBlock;
156 /// \brief Keep track of the metadata nodes that have been checked already.
157 SmallPtrSet<MDNode *, 32> MDNodes;
159 /// \brief The personality function referenced by the LandingPadInsts.
160 /// All LandingPadInsts within the same function must use the same
161 /// personality function.
162 const Value *PersonalityFn;
165 explicit Verifier(raw_ostream &OS = dbgs())
166 : VerifierSupport(OS), Context(nullptr), DL(nullptr),
167 PersonalityFn(nullptr) {}
169 bool verify(const Function &F) {
171 Context = &M->getContext();
173 // First ensure the function is well-enough formed to compute dominance
176 OS << "Function '" << F.getName()
177 << "' does not contain an entry block!\n";
180 for (Function::const_iterator I = F.begin(), E = F.end(); I != E; ++I) {
181 if (I->empty() || !I->back().isTerminator()) {
182 OS << "Basic Block in function '" << F.getName()
183 << "' does not have terminator!\n";
184 I->printAsOperand(OS, true);
190 // Now directly compute a dominance tree. We don't rely on the pass
191 // manager to provide this as it isolates us from a potentially
192 // out-of-date dominator tree and makes it significantly more complex to
193 // run this code outside of a pass manager.
194 // FIXME: It's really gross that we have to cast away constness here.
195 DT.recalculate(const_cast<Function &>(F));
198 // FIXME: We strip const here because the inst visitor strips const.
199 visit(const_cast<Function &>(F));
200 InstsInThisBlock.clear();
201 PersonalityFn = nullptr;
206 bool verify(const Module &M) {
208 Context = &M.getContext();
211 // Scan through, checking all of the external function's linkage now...
212 for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) {
213 visitGlobalValue(*I);
215 // Check to make sure function prototypes are okay.
216 if (I->isDeclaration())
220 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
222 visitGlobalVariable(*I);
224 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
226 visitGlobalAlias(*I);
228 for (Module::const_named_metadata_iterator I = M.named_metadata_begin(),
229 E = M.named_metadata_end();
231 visitNamedMDNode(*I);
234 visitModuleIdents(M);
240 // Verification methods...
241 void visitGlobalValue(const GlobalValue &GV);
242 void visitGlobalVariable(const GlobalVariable &GV);
243 void visitGlobalAlias(const GlobalAlias &GA);
244 void visitNamedMDNode(const NamedMDNode &NMD);
245 void visitMDNode(MDNode &MD, Function *F);
246 void visitModuleIdents(const Module &M);
247 void visitModuleFlags(const Module &M);
248 void visitModuleFlag(const MDNode *Op,
249 DenseMap<const MDString *, const MDNode *> &SeenIDs,
250 SmallVectorImpl<const MDNode *> &Requirements);
251 void visitFunction(const Function &F);
252 void visitBasicBlock(BasicBlock &BB);
254 // InstVisitor overrides...
255 using InstVisitor<Verifier>::visit;
256 void visit(Instruction &I);
258 void visitTruncInst(TruncInst &I);
259 void visitZExtInst(ZExtInst &I);
260 void visitSExtInst(SExtInst &I);
261 void visitFPTruncInst(FPTruncInst &I);
262 void visitFPExtInst(FPExtInst &I);
263 void visitFPToUIInst(FPToUIInst &I);
264 void visitFPToSIInst(FPToSIInst &I);
265 void visitUIToFPInst(UIToFPInst &I);
266 void visitSIToFPInst(SIToFPInst &I);
267 void visitIntToPtrInst(IntToPtrInst &I);
268 void visitPtrToIntInst(PtrToIntInst &I);
269 void visitBitCastInst(BitCastInst &I);
270 void visitAddrSpaceCastInst(AddrSpaceCastInst &I);
271 void visitPHINode(PHINode &PN);
272 void visitBinaryOperator(BinaryOperator &B);
273 void visitICmpInst(ICmpInst &IC);
274 void visitFCmpInst(FCmpInst &FC);
275 void visitExtractElementInst(ExtractElementInst &EI);
276 void visitInsertElementInst(InsertElementInst &EI);
277 void visitShuffleVectorInst(ShuffleVectorInst &EI);
278 void visitVAArgInst(VAArgInst &VAA) { visitInstruction(VAA); }
279 void visitCallInst(CallInst &CI);
280 void visitInvokeInst(InvokeInst &II);
281 void visitGetElementPtrInst(GetElementPtrInst &GEP);
282 void visitLoadInst(LoadInst &LI);
283 void visitStoreInst(StoreInst &SI);
284 void verifyDominatesUse(Instruction &I, unsigned i);
285 void visitInstruction(Instruction &I);
286 void visitTerminatorInst(TerminatorInst &I);
287 void visitBranchInst(BranchInst &BI);
288 void visitReturnInst(ReturnInst &RI);
289 void visitSwitchInst(SwitchInst &SI);
290 void visitIndirectBrInst(IndirectBrInst &BI);
291 void visitSelectInst(SelectInst &SI);
292 void visitUserOp1(Instruction &I);
293 void visitUserOp2(Instruction &I) { visitUserOp1(I); }
294 void visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI);
295 void visitAtomicCmpXchgInst(AtomicCmpXchgInst &CXI);
296 void visitAtomicRMWInst(AtomicRMWInst &RMWI);
297 void visitFenceInst(FenceInst &FI);
298 void visitAllocaInst(AllocaInst &AI);
299 void visitExtractValueInst(ExtractValueInst &EVI);
300 void visitInsertValueInst(InsertValueInst &IVI);
301 void visitLandingPadInst(LandingPadInst &LPI);
303 void VerifyCallSite(CallSite CS);
304 void verifyMustTailCall(CallInst &CI);
305 bool PerformTypeCheck(Intrinsic::ID ID, Function *F, Type *Ty, int VT,
306 unsigned ArgNo, std::string &Suffix);
307 bool VerifyIntrinsicType(Type *Ty, ArrayRef<Intrinsic::IITDescriptor> &Infos,
308 SmallVectorImpl<Type *> &ArgTys);
309 bool VerifyIntrinsicIsVarArg(bool isVarArg,
310 ArrayRef<Intrinsic::IITDescriptor> &Infos);
311 bool VerifyAttributeCount(AttributeSet Attrs, unsigned Params);
312 void VerifyAttributeTypes(AttributeSet Attrs, unsigned Idx, bool isFunction,
314 void VerifyParameterAttrs(AttributeSet Attrs, unsigned Idx, Type *Ty,
315 bool isReturnValue, const Value *V);
316 void VerifyFunctionAttrs(FunctionType *FT, AttributeSet Attrs,
319 void VerifyBitcastType(const Value *V, Type *DestTy, Type *SrcTy);
320 void VerifyConstantExprBitcastType(const ConstantExpr *CE);
322 class DebugInfoVerifier : public VerifierSupport {
324 explicit DebugInfoVerifier(raw_ostream &OS = dbgs()) : VerifierSupport(OS) {}
326 bool verify(const Module &M) {
333 void verifyDebugInfo();
334 void processInstructions(DebugInfoFinder &Finder);
335 void processCallInst(DebugInfoFinder &Finder, const CallInst &CI);
337 } // End anonymous namespace
339 // Assert - We know that cond should be true, if not print an error message.
340 #define Assert(C, M) \
341 do { if (!(C)) { CheckFailed(M); return; } } while (0)
342 #define Assert1(C, M, V1) \
343 do { if (!(C)) { CheckFailed(M, V1); return; } } while (0)
344 #define Assert2(C, M, V1, V2) \
345 do { if (!(C)) { CheckFailed(M, V1, V2); return; } } while (0)
346 #define Assert3(C, M, V1, V2, V3) \
347 do { if (!(C)) { CheckFailed(M, V1, V2, V3); return; } } while (0)
348 #define Assert4(C, M, V1, V2, V3, V4) \
349 do { if (!(C)) { CheckFailed(M, V1, V2, V3, V4); return; } } while (0)
351 void Verifier::visit(Instruction &I) {
352 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
353 Assert1(I.getOperand(i) != nullptr, "Operand is null", &I);
354 InstVisitor<Verifier>::visit(I);
358 void Verifier::visitGlobalValue(const GlobalValue &GV) {
359 Assert1(!GV.isDeclaration() ||
360 GV.isMaterializable() ||
361 GV.hasExternalLinkage() ||
362 GV.hasExternalWeakLinkage() ||
363 (isa<GlobalAlias>(GV) &&
364 (GV.hasLocalLinkage() || GV.hasWeakLinkage())),
365 "Global is external, but doesn't have external or weak linkage!",
368 Assert1(!GV.hasAppendingLinkage() || isa<GlobalVariable>(GV),
369 "Only global variables can have appending linkage!", &GV);
371 if (GV.hasAppendingLinkage()) {
372 const GlobalVariable *GVar = dyn_cast<GlobalVariable>(&GV);
373 Assert1(GVar && GVar->getType()->getElementType()->isArrayTy(),
374 "Only global arrays can have appending linkage!", GVar);
378 void Verifier::visitGlobalVariable(const GlobalVariable &GV) {
379 if (GV.hasInitializer()) {
380 Assert1(GV.getInitializer()->getType() == GV.getType()->getElementType(),
381 "Global variable initializer type does not match global "
382 "variable type!", &GV);
384 // If the global has common linkage, it must have a zero initializer and
385 // cannot be constant.
386 if (GV.hasCommonLinkage()) {
387 Assert1(GV.getInitializer()->isNullValue(),
388 "'common' global must have a zero initializer!", &GV);
389 Assert1(!GV.isConstant(), "'common' global may not be marked constant!",
393 Assert1(GV.hasExternalLinkage() || GV.hasExternalWeakLinkage(),
394 "invalid linkage type for global declaration", &GV);
397 if (GV.hasName() && (GV.getName() == "llvm.global_ctors" ||
398 GV.getName() == "llvm.global_dtors")) {
399 Assert1(!GV.hasInitializer() || GV.hasAppendingLinkage(),
400 "invalid linkage for intrinsic global variable", &GV);
401 // Don't worry about emitting an error for it not being an array,
402 // visitGlobalValue will complain on appending non-array.
403 if (ArrayType *ATy = dyn_cast<ArrayType>(GV.getType())) {
404 StructType *STy = dyn_cast<StructType>(ATy->getElementType());
405 PointerType *FuncPtrTy =
406 FunctionType::get(Type::getVoidTy(*Context), false)->getPointerTo();
407 Assert1(STy && STy->getNumElements() == 2 &&
408 STy->getTypeAtIndex(0u)->isIntegerTy(32) &&
409 STy->getTypeAtIndex(1) == FuncPtrTy,
410 "wrong type for intrinsic global variable", &GV);
414 if (GV.hasName() && (GV.getName() == "llvm.used" ||
415 GV.getName() == "llvm.compiler.used")) {
416 Assert1(!GV.hasInitializer() || GV.hasAppendingLinkage(),
417 "invalid linkage for intrinsic global variable", &GV);
418 Type *GVType = GV.getType()->getElementType();
419 if (ArrayType *ATy = dyn_cast<ArrayType>(GVType)) {
420 PointerType *PTy = dyn_cast<PointerType>(ATy->getElementType());
421 Assert1(PTy, "wrong type for intrinsic global variable", &GV);
422 if (GV.hasInitializer()) {
423 const Constant *Init = GV.getInitializer();
424 const ConstantArray *InitArray = dyn_cast<ConstantArray>(Init);
425 Assert1(InitArray, "wrong initalizer for intrinsic global variable",
427 for (unsigned i = 0, e = InitArray->getNumOperands(); i != e; ++i) {
428 Value *V = Init->getOperand(i)->stripPointerCastsNoFollowAliases();
430 isa<GlobalVariable>(V) || isa<Function>(V) || isa<GlobalAlias>(V),
431 "invalid llvm.used member", V);
432 Assert1(V->hasName(), "members of llvm.used must be named", V);
438 Assert1(!GV.hasDLLImportStorageClass() ||
439 (GV.isDeclaration() && GV.hasExternalLinkage()) ||
440 GV.hasAvailableExternallyLinkage(),
441 "Global is marked as dllimport, but not external", &GV);
443 if (!GV.hasInitializer()) {
444 visitGlobalValue(GV);
448 // Walk any aggregate initializers looking for bitcasts between address spaces
449 SmallPtrSet<const Value *, 4> Visited;
450 SmallVector<const Value *, 4> WorkStack;
451 WorkStack.push_back(cast<Value>(GV.getInitializer()));
453 while (!WorkStack.empty()) {
454 const Value *V = WorkStack.pop_back_val();
455 if (!Visited.insert(V))
458 if (const User *U = dyn_cast<User>(V)) {
459 for (unsigned I = 0, N = U->getNumOperands(); I != N; ++I)
460 WorkStack.push_back(U->getOperand(I));
463 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
464 VerifyConstantExprBitcastType(CE);
470 visitGlobalValue(GV);
473 void Verifier::visitGlobalAlias(const GlobalAlias &GA) {
474 Assert1(!GA.getName().empty(),
475 "Alias name cannot be empty!", &GA);
476 Assert1(GlobalAlias::isValidLinkage(GA.getLinkage()),
477 "Alias should have external or external weak linkage!", &GA);
478 Assert1(GA.getAliasee(),
479 "Aliasee cannot be NULL!", &GA);
480 Assert1(GA.getType() == GA.getAliasee()->getType(),
481 "Alias and aliasee types should match!", &GA);
482 Assert1(!GA.hasUnnamedAddr(), "Alias cannot have unnamed_addr!", &GA);
483 Assert1(!GA.hasSection(), "Alias cannot have a section!", &GA);
484 Assert1(!GA.getAlignment(), "Alias connot have an alignment", &GA);
486 const Constant *Aliasee = GA.getAliasee();
487 const GlobalValue *GV = dyn_cast<GlobalValue>(Aliasee);
490 const ConstantExpr *CE = dyn_cast<ConstantExpr>(Aliasee);
491 if (CE && (CE->getOpcode() == Instruction::BitCast ||
492 CE->getOpcode() == Instruction::AddrSpaceCast ||
493 CE->getOpcode() == Instruction::GetElementPtr))
494 GV = dyn_cast<GlobalValue>(CE->getOperand(0));
496 Assert1(GV, "Aliasee should be either GlobalValue, bitcast or "
497 "addrspacecast of GlobalValue",
500 if (CE->getOpcode() == Instruction::BitCast) {
501 unsigned SrcAS = GV->getType()->getPointerAddressSpace();
502 unsigned DstAS = CE->getType()->getPointerAddressSpace();
504 Assert1(SrcAS == DstAS,
505 "Alias bitcasts cannot be between different address spaces",
509 Assert1(!GV->isDeclaration(), "Alias must point to a definition", &GA);
510 if (const GlobalAlias *GAAliasee = dyn_cast<GlobalAlias>(GV)) {
511 Assert1(!GAAliasee->mayBeOverridden(), "Alias cannot point to a weak alias",
515 const GlobalValue *AG = GA.getAliasedGlobal();
516 Assert1(AG, "Aliasing chain should end with function or global variable",
519 visitGlobalValue(GA);
522 void Verifier::visitNamedMDNode(const NamedMDNode &NMD) {
523 for (unsigned i = 0, e = NMD.getNumOperands(); i != e; ++i) {
524 MDNode *MD = NMD.getOperand(i);
528 Assert1(!MD->isFunctionLocal(),
529 "Named metadata operand cannot be function local!", MD);
530 visitMDNode(*MD, nullptr);
534 void Verifier::visitMDNode(MDNode &MD, Function *F) {
535 // Only visit each node once. Metadata can be mutually recursive, so this
536 // avoids infinite recursion here, as well as being an optimization.
537 if (!MDNodes.insert(&MD))
540 for (unsigned i = 0, e = MD.getNumOperands(); i != e; ++i) {
541 Value *Op = MD.getOperand(i);
544 if (isa<Constant>(Op) || isa<MDString>(Op))
546 if (MDNode *N = dyn_cast<MDNode>(Op)) {
547 Assert2(MD.isFunctionLocal() || !N->isFunctionLocal(),
548 "Global metadata operand cannot be function local!", &MD, N);
552 Assert2(MD.isFunctionLocal(), "Invalid operand for global metadata!", &MD, Op);
554 // If this was an instruction, bb, or argument, verify that it is in the
555 // function that we expect.
556 Function *ActualF = nullptr;
557 if (Instruction *I = dyn_cast<Instruction>(Op))
558 ActualF = I->getParent()->getParent();
559 else if (BasicBlock *BB = dyn_cast<BasicBlock>(Op))
560 ActualF = BB->getParent();
561 else if (Argument *A = dyn_cast<Argument>(Op))
562 ActualF = A->getParent();
563 assert(ActualF && "Unimplemented function local metadata case!");
565 Assert2(ActualF == F, "function-local metadata used in wrong function",
570 void Verifier::visitModuleIdents(const Module &M) {
571 const NamedMDNode *Idents = M.getNamedMetadata("llvm.ident");
575 // llvm.ident takes a list of metadata entry. Each entry has only one string.
576 // Scan each llvm.ident entry and make sure that this requirement is met.
577 for (unsigned i = 0, e = Idents->getNumOperands(); i != e; ++i) {
578 const MDNode *N = Idents->getOperand(i);
579 Assert1(N->getNumOperands() == 1,
580 "incorrect number of operands in llvm.ident metadata", N);
581 Assert1(isa<MDString>(N->getOperand(0)),
582 ("invalid value for llvm.ident metadata entry operand"
583 "(the operand should be a string)"),
588 void Verifier::visitModuleFlags(const Module &M) {
589 const NamedMDNode *Flags = M.getModuleFlagsMetadata();
592 // Scan each flag, and track the flags and requirements.
593 DenseMap<const MDString*, const MDNode*> SeenIDs;
594 SmallVector<const MDNode*, 16> Requirements;
595 for (unsigned I = 0, E = Flags->getNumOperands(); I != E; ++I) {
596 visitModuleFlag(Flags->getOperand(I), SeenIDs, Requirements);
599 // Validate that the requirements in the module are valid.
600 for (unsigned I = 0, E = Requirements.size(); I != E; ++I) {
601 const MDNode *Requirement = Requirements[I];
602 const MDString *Flag = cast<MDString>(Requirement->getOperand(0));
603 const Value *ReqValue = Requirement->getOperand(1);
605 const MDNode *Op = SeenIDs.lookup(Flag);
607 CheckFailed("invalid requirement on flag, flag is not present in module",
612 if (Op->getOperand(2) != ReqValue) {
613 CheckFailed(("invalid requirement on flag, "
614 "flag does not have the required value"),
622 Verifier::visitModuleFlag(const MDNode *Op,
623 DenseMap<const MDString *, const MDNode *> &SeenIDs,
624 SmallVectorImpl<const MDNode *> &Requirements) {
625 // Each module flag should have three arguments, the merge behavior (a
626 // constant int), the flag ID (an MDString), and the value.
627 Assert1(Op->getNumOperands() == 3,
628 "incorrect number of operands in module flag", Op);
629 ConstantInt *Behavior = dyn_cast<ConstantInt>(Op->getOperand(0));
630 MDString *ID = dyn_cast<MDString>(Op->getOperand(1));
632 "invalid behavior operand in module flag (expected constant integer)",
634 unsigned BehaviorValue = Behavior->getZExtValue();
636 "invalid ID operand in module flag (expected metadata string)",
639 // Sanity check the values for behaviors with additional requirements.
640 switch (BehaviorValue) {
643 "invalid behavior operand in module flag (unexpected constant)",
648 case Module::Warning:
649 case Module::Override:
650 // These behavior types accept any value.
653 case Module::Require: {
654 // The value should itself be an MDNode with two operands, a flag ID (an
655 // MDString), and a value.
656 MDNode *Value = dyn_cast<MDNode>(Op->getOperand(2));
657 Assert1(Value && Value->getNumOperands() == 2,
658 "invalid value for 'require' module flag (expected metadata pair)",
660 Assert1(isa<MDString>(Value->getOperand(0)),
661 ("invalid value for 'require' module flag "
662 "(first value operand should be a string)"),
663 Value->getOperand(0));
665 // Append it to the list of requirements, to check once all module flags are
667 Requirements.push_back(Value);
672 case Module::AppendUnique: {
673 // These behavior types require the operand be an MDNode.
674 Assert1(isa<MDNode>(Op->getOperand(2)),
675 "invalid value for 'append'-type module flag "
676 "(expected a metadata node)", Op->getOperand(2));
681 // Unless this is a "requires" flag, check the ID is unique.
682 if (BehaviorValue != Module::Require) {
683 bool Inserted = SeenIDs.insert(std::make_pair(ID, Op)).second;
685 "module flag identifiers must be unique (or of 'require' type)",
690 void Verifier::VerifyAttributeTypes(AttributeSet Attrs, unsigned Idx,
691 bool isFunction, const Value *V) {
693 for (unsigned I = 0, E = Attrs.getNumSlots(); I != E; ++I)
694 if (Attrs.getSlotIndex(I) == Idx) {
699 assert(Slot != ~0U && "Attribute set inconsistency!");
701 for (AttributeSet::iterator I = Attrs.begin(Slot), E = Attrs.end(Slot);
703 if (I->isStringAttribute())
706 if (I->getKindAsEnum() == Attribute::NoReturn ||
707 I->getKindAsEnum() == Attribute::NoUnwind ||
708 I->getKindAsEnum() == Attribute::NoInline ||
709 I->getKindAsEnum() == Attribute::AlwaysInline ||
710 I->getKindAsEnum() == Attribute::OptimizeForSize ||
711 I->getKindAsEnum() == Attribute::StackProtect ||
712 I->getKindAsEnum() == Attribute::StackProtectReq ||
713 I->getKindAsEnum() == Attribute::StackProtectStrong ||
714 I->getKindAsEnum() == Attribute::NoRedZone ||
715 I->getKindAsEnum() == Attribute::NoImplicitFloat ||
716 I->getKindAsEnum() == Attribute::Naked ||
717 I->getKindAsEnum() == Attribute::InlineHint ||
718 I->getKindAsEnum() == Attribute::StackAlignment ||
719 I->getKindAsEnum() == Attribute::UWTable ||
720 I->getKindAsEnum() == Attribute::NonLazyBind ||
721 I->getKindAsEnum() == Attribute::ReturnsTwice ||
722 I->getKindAsEnum() == Attribute::SanitizeAddress ||
723 I->getKindAsEnum() == Attribute::SanitizeThread ||
724 I->getKindAsEnum() == Attribute::SanitizeMemory ||
725 I->getKindAsEnum() == Attribute::MinSize ||
726 I->getKindAsEnum() == Attribute::NoDuplicate ||
727 I->getKindAsEnum() == Attribute::Builtin ||
728 I->getKindAsEnum() == Attribute::NoBuiltin ||
729 I->getKindAsEnum() == Attribute::Cold ||
730 I->getKindAsEnum() == Attribute::OptimizeNone) {
732 CheckFailed("Attribute '" + I->getAsString() +
733 "' only applies to functions!", V);
736 } else if (I->getKindAsEnum() == Attribute::ReadOnly ||
737 I->getKindAsEnum() == Attribute::ReadNone) {
739 CheckFailed("Attribute '" + I->getAsString() +
740 "' does not apply to function returns");
743 } else if (isFunction) {
744 CheckFailed("Attribute '" + I->getAsString() +
745 "' does not apply to functions!", V);
751 // VerifyParameterAttrs - Check the given attributes for an argument or return
752 // value of the specified type. The value V is printed in error messages.
753 void Verifier::VerifyParameterAttrs(AttributeSet Attrs, unsigned Idx, Type *Ty,
754 bool isReturnValue, const Value *V) {
755 if (!Attrs.hasAttributes(Idx))
758 VerifyAttributeTypes(Attrs, Idx, false, V);
761 Assert1(!Attrs.hasAttribute(Idx, Attribute::ByVal) &&
762 !Attrs.hasAttribute(Idx, Attribute::Nest) &&
763 !Attrs.hasAttribute(Idx, Attribute::StructRet) &&
764 !Attrs.hasAttribute(Idx, Attribute::NoCapture) &&
765 !Attrs.hasAttribute(Idx, Attribute::Returned) &&
766 !Attrs.hasAttribute(Idx, Attribute::InAlloca),
767 "Attributes 'byval', 'inalloca', 'nest', 'sret', 'nocapture', and "
768 "'returned' do not apply to return values!", V);
770 // Check for mutually incompatible attributes. Only inreg is compatible with
772 unsigned AttrCount = 0;
773 AttrCount += Attrs.hasAttribute(Idx, Attribute::ByVal);
774 AttrCount += Attrs.hasAttribute(Idx, Attribute::InAlloca);
775 AttrCount += Attrs.hasAttribute(Idx, Attribute::StructRet) ||
776 Attrs.hasAttribute(Idx, Attribute::InReg);
777 AttrCount += Attrs.hasAttribute(Idx, Attribute::Nest);
778 Assert1(AttrCount <= 1, "Attributes 'byval', 'inalloca', 'inreg', 'nest', "
779 "and 'sret' are incompatible!", V);
781 Assert1(!(Attrs.hasAttribute(Idx, Attribute::InAlloca) &&
782 Attrs.hasAttribute(Idx, Attribute::ReadOnly)), "Attributes "
783 "'inalloca and readonly' are incompatible!", V);
785 Assert1(!(Attrs.hasAttribute(Idx, Attribute::StructRet) &&
786 Attrs.hasAttribute(Idx, Attribute::Returned)), "Attributes "
787 "'sret and returned' are incompatible!", V);
789 Assert1(!(Attrs.hasAttribute(Idx, Attribute::ZExt) &&
790 Attrs.hasAttribute(Idx, Attribute::SExt)), "Attributes "
791 "'zeroext and signext' are incompatible!", V);
793 Assert1(!(Attrs.hasAttribute(Idx, Attribute::ReadNone) &&
794 Attrs.hasAttribute(Idx, Attribute::ReadOnly)), "Attributes "
795 "'readnone and readonly' are incompatible!", V);
797 Assert1(!(Attrs.hasAttribute(Idx, Attribute::NoInline) &&
798 Attrs.hasAttribute(Idx, Attribute::AlwaysInline)), "Attributes "
799 "'noinline and alwaysinline' are incompatible!", V);
801 Assert1(!AttrBuilder(Attrs, Idx).
802 hasAttributes(AttributeFuncs::typeIncompatible(Ty, Idx), Idx),
803 "Wrong types for attribute: " +
804 AttributeFuncs::typeIncompatible(Ty, Idx).getAsString(Idx), V);
806 if (PointerType *PTy = dyn_cast<PointerType>(Ty)) {
807 if (!PTy->getElementType()->isSized()) {
808 Assert1(!Attrs.hasAttribute(Idx, Attribute::ByVal) &&
809 !Attrs.hasAttribute(Idx, Attribute::InAlloca),
810 "Attributes 'byval' and 'inalloca' do not support unsized types!",
814 Assert1(!Attrs.hasAttribute(Idx, Attribute::ByVal),
815 "Attribute 'byval' only applies to parameters with pointer type!",
820 // VerifyFunctionAttrs - Check parameter attributes against a function type.
821 // The value V is printed in error messages.
822 void Verifier::VerifyFunctionAttrs(FunctionType *FT, AttributeSet Attrs,
827 bool SawNest = false;
828 bool SawReturned = false;
830 for (unsigned i = 0, e = Attrs.getNumSlots(); i != e; ++i) {
831 unsigned Idx = Attrs.getSlotIndex(i);
835 Ty = FT->getReturnType();
836 else if (Idx-1 < FT->getNumParams())
837 Ty = FT->getParamType(Idx-1);
839 break; // VarArgs attributes, verified elsewhere.
841 VerifyParameterAttrs(Attrs, Idx, Ty, Idx == 0, V);
846 if (Attrs.hasAttribute(Idx, Attribute::Nest)) {
847 Assert1(!SawNest, "More than one parameter has attribute nest!", V);
851 if (Attrs.hasAttribute(Idx, Attribute::Returned)) {
852 Assert1(!SawReturned, "More than one parameter has attribute returned!",
854 Assert1(Ty->canLosslesslyBitCastTo(FT->getReturnType()), "Incompatible "
855 "argument and return types for 'returned' attribute", V);
859 if (Attrs.hasAttribute(Idx, Attribute::StructRet))
860 Assert1(Idx == 1, "Attribute sret is not on first parameter!", V);
862 if (Attrs.hasAttribute(Idx, Attribute::InAlloca)) {
863 Assert1(Idx == FT->getNumParams(),
864 "inalloca isn't on the last parameter!", V);
868 if (!Attrs.hasAttributes(AttributeSet::FunctionIndex))
871 VerifyAttributeTypes(Attrs, AttributeSet::FunctionIndex, true, V);
873 Assert1(!(Attrs.hasAttribute(AttributeSet::FunctionIndex,
874 Attribute::ReadNone) &&
875 Attrs.hasAttribute(AttributeSet::FunctionIndex,
876 Attribute::ReadOnly)),
877 "Attributes 'readnone and readonly' are incompatible!", V);
879 Assert1(!(Attrs.hasAttribute(AttributeSet::FunctionIndex,
880 Attribute::NoInline) &&
881 Attrs.hasAttribute(AttributeSet::FunctionIndex,
882 Attribute::AlwaysInline)),
883 "Attributes 'noinline and alwaysinline' are incompatible!", V);
885 if (Attrs.hasAttribute(AttributeSet::FunctionIndex,
886 Attribute::OptimizeNone)) {
887 Assert1(Attrs.hasAttribute(AttributeSet::FunctionIndex,
888 Attribute::NoInline),
889 "Attribute 'optnone' requires 'noinline'!", V);
891 Assert1(!Attrs.hasAttribute(AttributeSet::FunctionIndex,
892 Attribute::OptimizeForSize),
893 "Attributes 'optsize and optnone' are incompatible!", V);
895 Assert1(!Attrs.hasAttribute(AttributeSet::FunctionIndex,
897 "Attributes 'minsize and optnone' are incompatible!", V);
901 void Verifier::VerifyBitcastType(const Value *V, Type *DestTy, Type *SrcTy) {
902 // Get the size of the types in bits, we'll need this later
903 unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
904 unsigned DestBitSize = DestTy->getPrimitiveSizeInBits();
906 // BitCast implies a no-op cast of type only. No bits change.
907 // However, you can't cast pointers to anything but pointers.
908 Assert1(SrcTy->isPointerTy() == DestTy->isPointerTy(),
909 "Bitcast requires both operands to be pointer or neither", V);
910 Assert1(SrcBitSize == DestBitSize,
911 "Bitcast requires types of same width", V);
913 // Disallow aggregates.
914 Assert1(!SrcTy->isAggregateType(),
915 "Bitcast operand must not be aggregate", V);
916 Assert1(!DestTy->isAggregateType(),
917 "Bitcast type must not be aggregate", V);
919 // Without datalayout, assume all address spaces are the same size.
920 // Don't check if both types are not pointers.
921 // Skip casts between scalars and vectors.
923 !SrcTy->isPtrOrPtrVectorTy() ||
924 !DestTy->isPtrOrPtrVectorTy() ||
925 SrcTy->isVectorTy() != DestTy->isVectorTy()) {
929 unsigned SrcAS = SrcTy->getPointerAddressSpace();
930 unsigned DstAS = DestTy->getPointerAddressSpace();
932 Assert1(SrcAS == DstAS,
933 "Bitcasts between pointers of different address spaces is not legal."
934 "Use AddrSpaceCast instead.", V);
937 void Verifier::VerifyConstantExprBitcastType(const ConstantExpr *CE) {
938 if (CE->getOpcode() == Instruction::BitCast) {
939 Type *SrcTy = CE->getOperand(0)->getType();
940 Type *DstTy = CE->getType();
941 VerifyBitcastType(CE, DstTy, SrcTy);
945 bool Verifier::VerifyAttributeCount(AttributeSet Attrs, unsigned Params) {
946 if (Attrs.getNumSlots() == 0)
949 unsigned LastSlot = Attrs.getNumSlots() - 1;
950 unsigned LastIndex = Attrs.getSlotIndex(LastSlot);
951 if (LastIndex <= Params
952 || (LastIndex == AttributeSet::FunctionIndex
953 && (LastSlot == 0 || Attrs.getSlotIndex(LastSlot - 1) <= Params)))
959 // visitFunction - Verify that a function is ok.
961 void Verifier::visitFunction(const Function &F) {
962 // Check function arguments.
963 FunctionType *FT = F.getFunctionType();
964 unsigned NumArgs = F.arg_size();
966 Assert1(Context == &F.getContext(),
967 "Function context does not match Module context!", &F);
969 Assert1(!F.hasCommonLinkage(), "Functions may not have common linkage", &F);
970 Assert2(FT->getNumParams() == NumArgs,
971 "# formal arguments must match # of arguments for function type!",
973 Assert1(F.getReturnType()->isFirstClassType() ||
974 F.getReturnType()->isVoidTy() ||
975 F.getReturnType()->isStructTy(),
976 "Functions cannot return aggregate values!", &F);
978 Assert1(!F.hasStructRetAttr() || F.getReturnType()->isVoidTy(),
979 "Invalid struct return type!", &F);
981 AttributeSet Attrs = F.getAttributes();
983 Assert1(VerifyAttributeCount(Attrs, FT->getNumParams()),
984 "Attribute after last parameter!", &F);
986 // Check function attributes.
987 VerifyFunctionAttrs(FT, Attrs, &F);
989 // On function declarations/definitions, we do not support the builtin
990 // attribute. We do not check this in VerifyFunctionAttrs since that is
991 // checking for Attributes that can/can not ever be on functions.
992 Assert1(!Attrs.hasAttribute(AttributeSet::FunctionIndex,
994 "Attribute 'builtin' can only be applied to a callsite.", &F);
996 // Check that this function meets the restrictions on this calling convention.
997 switch (F.getCallingConv()) {
1000 case CallingConv::C:
1002 case CallingConv::Fast:
1003 case CallingConv::Cold:
1004 case CallingConv::X86_FastCall:
1005 case CallingConv::X86_ThisCall:
1006 case CallingConv::Intel_OCL_BI:
1007 case CallingConv::PTX_Kernel:
1008 case CallingConv::PTX_Device:
1009 Assert1(!F.isVarArg(),
1010 "Varargs functions must have C calling conventions!", &F);
1014 bool isLLVMdotName = F.getName().size() >= 5 &&
1015 F.getName().substr(0, 5) == "llvm.";
1017 // Check that the argument values match the function type for this function...
1019 for (Function::const_arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E;
1021 Assert2(I->getType() == FT->getParamType(i),
1022 "Argument value does not match function argument type!",
1023 I, FT->getParamType(i));
1024 Assert1(I->getType()->isFirstClassType(),
1025 "Function arguments must have first-class types!", I);
1027 Assert2(!I->getType()->isMetadataTy(),
1028 "Function takes metadata but isn't an intrinsic", I, &F);
1031 if (F.isMaterializable()) {
1032 // Function has a body somewhere we can't see.
1033 } else if (F.isDeclaration()) {
1034 Assert1(F.hasExternalLinkage() || F.hasExternalWeakLinkage(),
1035 "invalid linkage type for function declaration", &F);
1037 // Verify that this function (which has a body) is not named "llvm.*". It
1038 // is not legal to define intrinsics.
1039 Assert1(!isLLVMdotName, "llvm intrinsics cannot be defined!", &F);
1041 // Check the entry node
1042 const BasicBlock *Entry = &F.getEntryBlock();
1043 Assert1(pred_begin(Entry) == pred_end(Entry),
1044 "Entry block to function must not have predecessors!", Entry);
1046 // The address of the entry block cannot be taken, unless it is dead.
1047 if (Entry->hasAddressTaken()) {
1048 Assert1(!BlockAddress::lookup(Entry)->isConstantUsed(),
1049 "blockaddress may not be used with the entry block!", Entry);
1053 // If this function is actually an intrinsic, verify that it is only used in
1054 // direct call/invokes, never having its "address taken".
1055 if (F.getIntrinsicID()) {
1057 if (F.hasAddressTaken(&U))
1058 Assert1(0, "Invalid user of intrinsic instruction!", U);
1061 Assert1(!F.hasDLLImportStorageClass() ||
1062 (F.isDeclaration() && F.hasExternalLinkage()) ||
1063 F.hasAvailableExternallyLinkage(),
1064 "Function is marked as dllimport, but not external.", &F);
1067 // verifyBasicBlock - Verify that a basic block is well formed...
1069 void Verifier::visitBasicBlock(BasicBlock &BB) {
1070 InstsInThisBlock.clear();
1072 // Ensure that basic blocks have terminators!
1073 Assert1(BB.getTerminator(), "Basic Block does not have terminator!", &BB);
1075 // Check constraints that this basic block imposes on all of the PHI nodes in
1077 if (isa<PHINode>(BB.front())) {
1078 SmallVector<BasicBlock*, 8> Preds(pred_begin(&BB), pred_end(&BB));
1079 SmallVector<std::pair<BasicBlock*, Value*>, 8> Values;
1080 std::sort(Preds.begin(), Preds.end());
1082 for (BasicBlock::iterator I = BB.begin(); (PN = dyn_cast<PHINode>(I));++I) {
1083 // Ensure that PHI nodes have at least one entry!
1084 Assert1(PN->getNumIncomingValues() != 0,
1085 "PHI nodes must have at least one entry. If the block is dead, "
1086 "the PHI should be removed!", PN);
1087 Assert1(PN->getNumIncomingValues() == Preds.size(),
1088 "PHINode should have one entry for each predecessor of its "
1089 "parent basic block!", PN);
1091 // Get and sort all incoming values in the PHI node...
1093 Values.reserve(PN->getNumIncomingValues());
1094 for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i)
1095 Values.push_back(std::make_pair(PN->getIncomingBlock(i),
1096 PN->getIncomingValue(i)));
1097 std::sort(Values.begin(), Values.end());
1099 for (unsigned i = 0, e = Values.size(); i != e; ++i) {
1100 // Check to make sure that if there is more than one entry for a
1101 // particular basic block in this PHI node, that the incoming values are
1104 Assert4(i == 0 || Values[i].first != Values[i-1].first ||
1105 Values[i].second == Values[i-1].second,
1106 "PHI node has multiple entries for the same basic block with "
1107 "different incoming values!", PN, Values[i].first,
1108 Values[i].second, Values[i-1].second);
1110 // Check to make sure that the predecessors and PHI node entries are
1112 Assert3(Values[i].first == Preds[i],
1113 "PHI node entries do not match predecessors!", PN,
1114 Values[i].first, Preds[i]);
1120 void Verifier::visitTerminatorInst(TerminatorInst &I) {
1121 // Ensure that terminators only exist at the end of the basic block.
1122 Assert1(&I == I.getParent()->getTerminator(),
1123 "Terminator found in the middle of a basic block!", I.getParent());
1124 visitInstruction(I);
1127 void Verifier::visitBranchInst(BranchInst &BI) {
1128 if (BI.isConditional()) {
1129 Assert2(BI.getCondition()->getType()->isIntegerTy(1),
1130 "Branch condition is not 'i1' type!", &BI, BI.getCondition());
1132 visitTerminatorInst(BI);
1135 void Verifier::visitReturnInst(ReturnInst &RI) {
1136 Function *F = RI.getParent()->getParent();
1137 unsigned N = RI.getNumOperands();
1138 if (F->getReturnType()->isVoidTy())
1140 "Found return instr that returns non-void in Function of void "
1141 "return type!", &RI, F->getReturnType());
1143 Assert2(N == 1 && F->getReturnType() == RI.getOperand(0)->getType(),
1144 "Function return type does not match operand "
1145 "type of return inst!", &RI, F->getReturnType());
1147 // Check to make sure that the return value has necessary properties for
1149 visitTerminatorInst(RI);
1152 void Verifier::visitSwitchInst(SwitchInst &SI) {
1153 // Check to make sure that all of the constants in the switch instruction
1154 // have the same type as the switched-on value.
1155 Type *SwitchTy = SI.getCondition()->getType();
1156 SmallPtrSet<ConstantInt*, 32> Constants;
1157 for (SwitchInst::CaseIt i = SI.case_begin(), e = SI.case_end(); i != e; ++i) {
1158 Assert1(i.getCaseValue()->getType() == SwitchTy,
1159 "Switch constants must all be same type as switch value!", &SI);
1160 Assert2(Constants.insert(i.getCaseValue()),
1161 "Duplicate integer as switch case", &SI, i.getCaseValue());
1164 visitTerminatorInst(SI);
1167 void Verifier::visitIndirectBrInst(IndirectBrInst &BI) {
1168 Assert1(BI.getAddress()->getType()->isPointerTy(),
1169 "Indirectbr operand must have pointer type!", &BI);
1170 for (unsigned i = 0, e = BI.getNumDestinations(); i != e; ++i)
1171 Assert1(BI.getDestination(i)->getType()->isLabelTy(),
1172 "Indirectbr destinations must all have pointer type!", &BI);
1174 visitTerminatorInst(BI);
1177 void Verifier::visitSelectInst(SelectInst &SI) {
1178 Assert1(!SelectInst::areInvalidOperands(SI.getOperand(0), SI.getOperand(1),
1180 "Invalid operands for select instruction!", &SI);
1182 Assert1(SI.getTrueValue()->getType() == SI.getType(),
1183 "Select values must have same type as select instruction!", &SI);
1184 visitInstruction(SI);
1187 /// visitUserOp1 - User defined operators shouldn't live beyond the lifetime of
1188 /// a pass, if any exist, it's an error.
1190 void Verifier::visitUserOp1(Instruction &I) {
1191 Assert1(0, "User-defined operators should not live outside of a pass!", &I);
1194 void Verifier::visitTruncInst(TruncInst &I) {
1195 // Get the source and destination types
1196 Type *SrcTy = I.getOperand(0)->getType();
1197 Type *DestTy = I.getType();
1199 // Get the size of the types in bits, we'll need this later
1200 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
1201 unsigned DestBitSize = DestTy->getScalarSizeInBits();
1203 Assert1(SrcTy->isIntOrIntVectorTy(), "Trunc only operates on integer", &I);
1204 Assert1(DestTy->isIntOrIntVectorTy(), "Trunc only produces integer", &I);
1205 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1206 "trunc source and destination must both be a vector or neither", &I);
1207 Assert1(SrcBitSize > DestBitSize,"DestTy too big for Trunc", &I);
1209 visitInstruction(I);
1212 void Verifier::visitZExtInst(ZExtInst &I) {
1213 // Get the source and destination types
1214 Type *SrcTy = I.getOperand(0)->getType();
1215 Type *DestTy = I.getType();
1217 // Get the size of the types in bits, we'll need this later
1218 Assert1(SrcTy->isIntOrIntVectorTy(), "ZExt only operates on integer", &I);
1219 Assert1(DestTy->isIntOrIntVectorTy(), "ZExt only produces an integer", &I);
1220 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1221 "zext source and destination must both be a vector or neither", &I);
1222 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
1223 unsigned DestBitSize = DestTy->getScalarSizeInBits();
1225 Assert1(SrcBitSize < DestBitSize,"Type too small for ZExt", &I);
1227 visitInstruction(I);
1230 void Verifier::visitSExtInst(SExtInst &I) {
1231 // Get the source and destination types
1232 Type *SrcTy = I.getOperand(0)->getType();
1233 Type *DestTy = I.getType();
1235 // Get the size of the types in bits, we'll need this later
1236 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
1237 unsigned DestBitSize = DestTy->getScalarSizeInBits();
1239 Assert1(SrcTy->isIntOrIntVectorTy(), "SExt only operates on integer", &I);
1240 Assert1(DestTy->isIntOrIntVectorTy(), "SExt only produces an integer", &I);
1241 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1242 "sext source and destination must both be a vector or neither", &I);
1243 Assert1(SrcBitSize < DestBitSize,"Type too small for SExt", &I);
1245 visitInstruction(I);
1248 void Verifier::visitFPTruncInst(FPTruncInst &I) {
1249 // Get the source and destination types
1250 Type *SrcTy = I.getOperand(0)->getType();
1251 Type *DestTy = I.getType();
1252 // Get the size of the types in bits, we'll need this later
1253 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
1254 unsigned DestBitSize = DestTy->getScalarSizeInBits();
1256 Assert1(SrcTy->isFPOrFPVectorTy(),"FPTrunc only operates on FP", &I);
1257 Assert1(DestTy->isFPOrFPVectorTy(),"FPTrunc only produces an FP", &I);
1258 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1259 "fptrunc source and destination must both be a vector or neither",&I);
1260 Assert1(SrcBitSize > DestBitSize,"DestTy too big for FPTrunc", &I);
1262 visitInstruction(I);
1265 void Verifier::visitFPExtInst(FPExtInst &I) {
1266 // Get the source and destination types
1267 Type *SrcTy = I.getOperand(0)->getType();
1268 Type *DestTy = I.getType();
1270 // Get the size of the types in bits, we'll need this later
1271 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
1272 unsigned DestBitSize = DestTy->getScalarSizeInBits();
1274 Assert1(SrcTy->isFPOrFPVectorTy(),"FPExt only operates on FP", &I);
1275 Assert1(DestTy->isFPOrFPVectorTy(),"FPExt only produces an FP", &I);
1276 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1277 "fpext source and destination must both be a vector or neither", &I);
1278 Assert1(SrcBitSize < DestBitSize,"DestTy too small for FPExt", &I);
1280 visitInstruction(I);
1283 void Verifier::visitUIToFPInst(UIToFPInst &I) {
1284 // Get the source and destination types
1285 Type *SrcTy = I.getOperand(0)->getType();
1286 Type *DestTy = I.getType();
1288 bool SrcVec = SrcTy->isVectorTy();
1289 bool DstVec = DestTy->isVectorTy();
1291 Assert1(SrcVec == DstVec,
1292 "UIToFP source and dest must both be vector or scalar", &I);
1293 Assert1(SrcTy->isIntOrIntVectorTy(),
1294 "UIToFP source must be integer or integer vector", &I);
1295 Assert1(DestTy->isFPOrFPVectorTy(),
1296 "UIToFP result must be FP or FP vector", &I);
1298 if (SrcVec && DstVec)
1299 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1300 cast<VectorType>(DestTy)->getNumElements(),
1301 "UIToFP source and dest vector length mismatch", &I);
1303 visitInstruction(I);
1306 void Verifier::visitSIToFPInst(SIToFPInst &I) {
1307 // Get the source and destination types
1308 Type *SrcTy = I.getOperand(0)->getType();
1309 Type *DestTy = I.getType();
1311 bool SrcVec = SrcTy->isVectorTy();
1312 bool DstVec = DestTy->isVectorTy();
1314 Assert1(SrcVec == DstVec,
1315 "SIToFP source and dest must both be vector or scalar", &I);
1316 Assert1(SrcTy->isIntOrIntVectorTy(),
1317 "SIToFP source must be integer or integer vector", &I);
1318 Assert1(DestTy->isFPOrFPVectorTy(),
1319 "SIToFP result must be FP or FP vector", &I);
1321 if (SrcVec && DstVec)
1322 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1323 cast<VectorType>(DestTy)->getNumElements(),
1324 "SIToFP source and dest vector length mismatch", &I);
1326 visitInstruction(I);
1329 void Verifier::visitFPToUIInst(FPToUIInst &I) {
1330 // Get the source and destination types
1331 Type *SrcTy = I.getOperand(0)->getType();
1332 Type *DestTy = I.getType();
1334 bool SrcVec = SrcTy->isVectorTy();
1335 bool DstVec = DestTy->isVectorTy();
1337 Assert1(SrcVec == DstVec,
1338 "FPToUI source and dest must both be vector or scalar", &I);
1339 Assert1(SrcTy->isFPOrFPVectorTy(), "FPToUI source must be FP or FP vector",
1341 Assert1(DestTy->isIntOrIntVectorTy(),
1342 "FPToUI result must be integer or integer vector", &I);
1344 if (SrcVec && DstVec)
1345 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1346 cast<VectorType>(DestTy)->getNumElements(),
1347 "FPToUI source and dest vector length mismatch", &I);
1349 visitInstruction(I);
1352 void Verifier::visitFPToSIInst(FPToSIInst &I) {
1353 // Get the source and destination types
1354 Type *SrcTy = I.getOperand(0)->getType();
1355 Type *DestTy = I.getType();
1357 bool SrcVec = SrcTy->isVectorTy();
1358 bool DstVec = DestTy->isVectorTy();
1360 Assert1(SrcVec == DstVec,
1361 "FPToSI source and dest must both be vector or scalar", &I);
1362 Assert1(SrcTy->isFPOrFPVectorTy(),
1363 "FPToSI source must be FP or FP vector", &I);
1364 Assert1(DestTy->isIntOrIntVectorTy(),
1365 "FPToSI result must be integer or integer vector", &I);
1367 if (SrcVec && DstVec)
1368 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1369 cast<VectorType>(DestTy)->getNumElements(),
1370 "FPToSI source and dest vector length mismatch", &I);
1372 visitInstruction(I);
1375 void Verifier::visitPtrToIntInst(PtrToIntInst &I) {
1376 // Get the source and destination types
1377 Type *SrcTy = I.getOperand(0)->getType();
1378 Type *DestTy = I.getType();
1380 Assert1(SrcTy->getScalarType()->isPointerTy(),
1381 "PtrToInt source must be pointer", &I);
1382 Assert1(DestTy->getScalarType()->isIntegerTy(),
1383 "PtrToInt result must be integral", &I);
1384 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1385 "PtrToInt type mismatch", &I);
1387 if (SrcTy->isVectorTy()) {
1388 VectorType *VSrc = dyn_cast<VectorType>(SrcTy);
1389 VectorType *VDest = dyn_cast<VectorType>(DestTy);
1390 Assert1(VSrc->getNumElements() == VDest->getNumElements(),
1391 "PtrToInt Vector width mismatch", &I);
1394 visitInstruction(I);
1397 void Verifier::visitIntToPtrInst(IntToPtrInst &I) {
1398 // Get the source and destination types
1399 Type *SrcTy = I.getOperand(0)->getType();
1400 Type *DestTy = I.getType();
1402 Assert1(SrcTy->getScalarType()->isIntegerTy(),
1403 "IntToPtr source must be an integral", &I);
1404 Assert1(DestTy->getScalarType()->isPointerTy(),
1405 "IntToPtr result must be a pointer",&I);
1406 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1407 "IntToPtr type mismatch", &I);
1408 if (SrcTy->isVectorTy()) {
1409 VectorType *VSrc = dyn_cast<VectorType>(SrcTy);
1410 VectorType *VDest = dyn_cast<VectorType>(DestTy);
1411 Assert1(VSrc->getNumElements() == VDest->getNumElements(),
1412 "IntToPtr Vector width mismatch", &I);
1414 visitInstruction(I);
1417 void Verifier::visitBitCastInst(BitCastInst &I) {
1418 Type *SrcTy = I.getOperand(0)->getType();
1419 Type *DestTy = I.getType();
1420 VerifyBitcastType(&I, DestTy, SrcTy);
1421 visitInstruction(I);
1424 void Verifier::visitAddrSpaceCastInst(AddrSpaceCastInst &I) {
1425 Type *SrcTy = I.getOperand(0)->getType();
1426 Type *DestTy = I.getType();
1428 Assert1(SrcTy->isPtrOrPtrVectorTy(),
1429 "AddrSpaceCast source must be a pointer", &I);
1430 Assert1(DestTy->isPtrOrPtrVectorTy(),
1431 "AddrSpaceCast result must be a pointer", &I);
1432 Assert1(SrcTy->getPointerAddressSpace() != DestTy->getPointerAddressSpace(),
1433 "AddrSpaceCast must be between different address spaces", &I);
1434 if (SrcTy->isVectorTy())
1435 Assert1(SrcTy->getVectorNumElements() == DestTy->getVectorNumElements(),
1436 "AddrSpaceCast vector pointer number of elements mismatch", &I);
1437 visitInstruction(I);
1440 /// visitPHINode - Ensure that a PHI node is well formed.
1442 void Verifier::visitPHINode(PHINode &PN) {
1443 // Ensure that the PHI nodes are all grouped together at the top of the block.
1444 // This can be tested by checking whether the instruction before this is
1445 // either nonexistent (because this is begin()) or is a PHI node. If not,
1446 // then there is some other instruction before a PHI.
1447 Assert2(&PN == &PN.getParent()->front() ||
1448 isa<PHINode>(--BasicBlock::iterator(&PN)),
1449 "PHI nodes not grouped at top of basic block!",
1450 &PN, PN.getParent());
1452 // Check that all of the values of the PHI node have the same type as the
1453 // result, and that the incoming blocks are really basic blocks.
1454 for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i) {
1455 Assert1(PN.getType() == PN.getIncomingValue(i)->getType(),
1456 "PHI node operands are not the same type as the result!", &PN);
1459 // All other PHI node constraints are checked in the visitBasicBlock method.
1461 visitInstruction(PN);
1464 void Verifier::VerifyCallSite(CallSite CS) {
1465 Instruction *I = CS.getInstruction();
1467 Assert1(CS.getCalledValue()->getType()->isPointerTy(),
1468 "Called function must be a pointer!", I);
1469 PointerType *FPTy = cast<PointerType>(CS.getCalledValue()->getType());
1471 Assert1(FPTy->getElementType()->isFunctionTy(),
1472 "Called function is not pointer to function type!", I);
1473 FunctionType *FTy = cast<FunctionType>(FPTy->getElementType());
1475 // Verify that the correct number of arguments are being passed
1476 if (FTy->isVarArg())
1477 Assert1(CS.arg_size() >= FTy->getNumParams(),
1478 "Called function requires more parameters than were provided!",I);
1480 Assert1(CS.arg_size() == FTy->getNumParams(),
1481 "Incorrect number of arguments passed to called function!", I);
1483 // Verify that all arguments to the call match the function type.
1484 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
1485 Assert3(CS.getArgument(i)->getType() == FTy->getParamType(i),
1486 "Call parameter type does not match function signature!",
1487 CS.getArgument(i), FTy->getParamType(i), I);
1489 AttributeSet Attrs = CS.getAttributes();
1491 Assert1(VerifyAttributeCount(Attrs, CS.arg_size()),
1492 "Attribute after last parameter!", I);
1494 // Verify call attributes.
1495 VerifyFunctionAttrs(FTy, Attrs, I);
1497 // Conservatively check the inalloca argument.
1498 // We have a bug if we can find that there is an underlying alloca without
1500 if (CS.hasInAllocaArgument()) {
1501 Value *InAllocaArg = CS.getArgument(FTy->getNumParams() - 1);
1502 if (auto AI = dyn_cast<AllocaInst>(InAllocaArg->stripInBoundsOffsets()))
1503 Assert2(AI->isUsedWithInAlloca(),
1504 "inalloca argument for call has mismatched alloca", AI, I);
1507 if (FTy->isVarArg()) {
1508 // FIXME? is 'nest' even legal here?
1509 bool SawNest = false;
1510 bool SawReturned = false;
1512 for (unsigned Idx = 1; Idx < 1 + FTy->getNumParams(); ++Idx) {
1513 if (Attrs.hasAttribute(Idx, Attribute::Nest))
1515 if (Attrs.hasAttribute(Idx, Attribute::Returned))
1519 // Check attributes on the varargs part.
1520 for (unsigned Idx = 1 + FTy->getNumParams(); Idx <= CS.arg_size(); ++Idx) {
1521 Type *Ty = CS.getArgument(Idx-1)->getType();
1522 VerifyParameterAttrs(Attrs, Idx, Ty, false, I);
1524 if (Attrs.hasAttribute(Idx, Attribute::Nest)) {
1525 Assert1(!SawNest, "More than one parameter has attribute nest!", I);
1529 if (Attrs.hasAttribute(Idx, Attribute::Returned)) {
1530 Assert1(!SawReturned, "More than one parameter has attribute returned!",
1532 Assert1(Ty->canLosslesslyBitCastTo(FTy->getReturnType()),
1533 "Incompatible argument and return types for 'returned' "
1538 Assert1(!Attrs.hasAttribute(Idx, Attribute::StructRet),
1539 "Attribute 'sret' cannot be used for vararg call arguments!", I);
1541 if (Attrs.hasAttribute(Idx, Attribute::InAlloca))
1542 Assert1(Idx == CS.arg_size(), "inalloca isn't on the last argument!",
1547 // Verify that there's no metadata unless it's a direct call to an intrinsic.
1548 if (CS.getCalledFunction() == nullptr ||
1549 !CS.getCalledFunction()->getName().startswith("llvm.")) {
1550 for (FunctionType::param_iterator PI = FTy->param_begin(),
1551 PE = FTy->param_end(); PI != PE; ++PI)
1552 Assert1(!(*PI)->isMetadataTy(),
1553 "Function has metadata parameter but isn't an intrinsic", I);
1556 visitInstruction(*I);
1559 /// Two types are "congruent" if they are identical, or if they are both pointer
1560 /// types with different pointee types and the same address space.
1561 static bool isTypeCongruent(Type *L, Type *R) {
1564 PointerType *PL = dyn_cast<PointerType>(L);
1565 PointerType *PR = dyn_cast<PointerType>(R);
1568 return PL->getAddressSpace() == PR->getAddressSpace();
1571 void Verifier::verifyMustTailCall(CallInst &CI) {
1572 Assert1(!CI.isInlineAsm(), "cannot use musttail call with inline asm", &CI);
1574 // - The caller and callee prototypes must match. Pointer types of
1575 // parameters or return types may differ in pointee type, but not
1577 Function *F = CI.getParent()->getParent();
1578 auto GetFnTy = [](Value *V) {
1579 return cast<FunctionType>(
1580 cast<PointerType>(V->getType())->getElementType());
1582 FunctionType *CallerTy = GetFnTy(F);
1583 FunctionType *CalleeTy = GetFnTy(CI.getCalledValue());
1584 Assert1(CallerTy->getNumParams() == CalleeTy->getNumParams(),
1585 "cannot guarantee tail call due to mismatched parameter counts", &CI);
1586 Assert1(CallerTy->isVarArg() == CalleeTy->isVarArg(),
1587 "cannot guarantee tail call due to mismatched varargs", &CI);
1588 Assert1(isTypeCongruent(CallerTy->getReturnType(), CalleeTy->getReturnType()),
1589 "cannot guarantee tail call due to mismatched return types", &CI);
1590 for (int I = 0, E = CallerTy->getNumParams(); I != E; ++I) {
1592 isTypeCongruent(CallerTy->getParamType(I), CalleeTy->getParamType(I)),
1593 "cannot guarantee tail call due to mismatched parameter types", &CI);
1596 // - The calling conventions of the caller and callee must match.
1597 Assert1(F->getCallingConv() == CI.getCallingConv(),
1598 "cannot guarantee tail call due to mismatched calling conv", &CI);
1600 // - All ABI-impacting function attributes, such as sret, byval, inreg,
1601 // returned, and inalloca, must match.
1602 static const Attribute::AttrKind ABIAttrs[] = {
1603 Attribute::Alignment, Attribute::StructRet, Attribute::ByVal,
1604 Attribute::InAlloca, Attribute::InReg, Attribute::Returned};
1605 AttributeSet CallerAttrs = F->getAttributes();
1606 AttributeSet CalleeAttrs = CI.getAttributes();
1607 for (int I = 0, E = CallerTy->getNumParams(); I != E; ++I) {
1608 AttrBuilder CallerABIAttrs;
1609 AttrBuilder CalleeABIAttrs;
1610 for (auto AK : ABIAttrs) {
1611 if (CallerAttrs.hasAttribute(I + 1, AK))
1612 CallerABIAttrs.addAttribute(AK);
1613 if (CalleeAttrs.hasAttribute(I + 1, AK))
1614 CalleeABIAttrs.addAttribute(AK);
1616 Assert2(CallerABIAttrs == CalleeABIAttrs,
1617 "cannot guarantee tail call due to mismatched ABI impacting "
1618 "function attributes", &CI, CI.getOperand(I));
1621 // - The call must immediately precede a :ref:`ret <i_ret>` instruction,
1622 // or a pointer bitcast followed by a ret instruction.
1623 // - The ret instruction must return the (possibly bitcasted) value
1624 // produced by the call or void.
1625 Value *RetVal = &CI;
1626 Instruction *Next = CI.getNextNode();
1628 // Handle the optional bitcast.
1629 if (BitCastInst *BI = dyn_cast_or_null<BitCastInst>(Next)) {
1630 Assert1(BI->getOperand(0) == RetVal,
1631 "bitcast following musttail call must use the call", BI);
1633 Next = BI->getNextNode();
1636 // Check the return.
1637 ReturnInst *Ret = dyn_cast_or_null<ReturnInst>(Next);
1638 Assert1(Ret, "musttail call must be precede a ret with an optional bitcast",
1640 Assert1(!Ret->getReturnValue() || Ret->getReturnValue() == RetVal,
1641 "musttail call result must be returned", Ret);
1644 void Verifier::visitCallInst(CallInst &CI) {
1645 VerifyCallSite(&CI);
1647 if (CI.isMustTailCall())
1648 verifyMustTailCall(CI);
1650 if (Function *F = CI.getCalledFunction())
1651 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
1652 visitIntrinsicFunctionCall(ID, CI);
1655 void Verifier::visitInvokeInst(InvokeInst &II) {
1656 VerifyCallSite(&II);
1658 // Verify that there is a landingpad instruction as the first non-PHI
1659 // instruction of the 'unwind' destination.
1660 Assert1(II.getUnwindDest()->isLandingPad(),
1661 "The unwind destination does not have a landingpad instruction!",&II);
1663 visitTerminatorInst(II);
1666 /// visitBinaryOperator - Check that both arguments to the binary operator are
1667 /// of the same type!
1669 void Verifier::visitBinaryOperator(BinaryOperator &B) {
1670 Assert1(B.getOperand(0)->getType() == B.getOperand(1)->getType(),
1671 "Both operands to a binary operator are not of the same type!", &B);
1673 switch (B.getOpcode()) {
1674 // Check that integer arithmetic operators are only used with
1675 // integral operands.
1676 case Instruction::Add:
1677 case Instruction::Sub:
1678 case Instruction::Mul:
1679 case Instruction::SDiv:
1680 case Instruction::UDiv:
1681 case Instruction::SRem:
1682 case Instruction::URem:
1683 Assert1(B.getType()->isIntOrIntVectorTy(),
1684 "Integer arithmetic operators only work with integral types!", &B);
1685 Assert1(B.getType() == B.getOperand(0)->getType(),
1686 "Integer arithmetic operators must have same type "
1687 "for operands and result!", &B);
1689 // Check that floating-point arithmetic operators are only used with
1690 // floating-point operands.
1691 case Instruction::FAdd:
1692 case Instruction::FSub:
1693 case Instruction::FMul:
1694 case Instruction::FDiv:
1695 case Instruction::FRem:
1696 Assert1(B.getType()->isFPOrFPVectorTy(),
1697 "Floating-point arithmetic operators only work with "
1698 "floating-point types!", &B);
1699 Assert1(B.getType() == B.getOperand(0)->getType(),
1700 "Floating-point arithmetic operators must have same type "
1701 "for operands and result!", &B);
1703 // Check that logical operators are only used with integral operands.
1704 case Instruction::And:
1705 case Instruction::Or:
1706 case Instruction::Xor:
1707 Assert1(B.getType()->isIntOrIntVectorTy(),
1708 "Logical operators only work with integral types!", &B);
1709 Assert1(B.getType() == B.getOperand(0)->getType(),
1710 "Logical operators must have same type for operands and result!",
1713 case Instruction::Shl:
1714 case Instruction::LShr:
1715 case Instruction::AShr:
1716 Assert1(B.getType()->isIntOrIntVectorTy(),
1717 "Shifts only work with integral types!", &B);
1718 Assert1(B.getType() == B.getOperand(0)->getType(),
1719 "Shift return type must be same as operands!", &B);
1722 llvm_unreachable("Unknown BinaryOperator opcode!");
1725 visitInstruction(B);
1728 void Verifier::visitICmpInst(ICmpInst &IC) {
1729 // Check that the operands are the same type
1730 Type *Op0Ty = IC.getOperand(0)->getType();
1731 Type *Op1Ty = IC.getOperand(1)->getType();
1732 Assert1(Op0Ty == Op1Ty,
1733 "Both operands to ICmp instruction are not of the same type!", &IC);
1734 // Check that the operands are the right type
1735 Assert1(Op0Ty->isIntOrIntVectorTy() || Op0Ty->getScalarType()->isPointerTy(),
1736 "Invalid operand types for ICmp instruction", &IC);
1737 // Check that the predicate is valid.
1738 Assert1(IC.getPredicate() >= CmpInst::FIRST_ICMP_PREDICATE &&
1739 IC.getPredicate() <= CmpInst::LAST_ICMP_PREDICATE,
1740 "Invalid predicate in ICmp instruction!", &IC);
1742 visitInstruction(IC);
1745 void Verifier::visitFCmpInst(FCmpInst &FC) {
1746 // Check that the operands are the same type
1747 Type *Op0Ty = FC.getOperand(0)->getType();
1748 Type *Op1Ty = FC.getOperand(1)->getType();
1749 Assert1(Op0Ty == Op1Ty,
1750 "Both operands to FCmp instruction are not of the same type!", &FC);
1751 // Check that the operands are the right type
1752 Assert1(Op0Ty->isFPOrFPVectorTy(),
1753 "Invalid operand types for FCmp instruction", &FC);
1754 // Check that the predicate is valid.
1755 Assert1(FC.getPredicate() >= CmpInst::FIRST_FCMP_PREDICATE &&
1756 FC.getPredicate() <= CmpInst::LAST_FCMP_PREDICATE,
1757 "Invalid predicate in FCmp instruction!", &FC);
1759 visitInstruction(FC);
1762 void Verifier::visitExtractElementInst(ExtractElementInst &EI) {
1763 Assert1(ExtractElementInst::isValidOperands(EI.getOperand(0),
1765 "Invalid extractelement operands!", &EI);
1766 visitInstruction(EI);
1769 void Verifier::visitInsertElementInst(InsertElementInst &IE) {
1770 Assert1(InsertElementInst::isValidOperands(IE.getOperand(0),
1773 "Invalid insertelement operands!", &IE);
1774 visitInstruction(IE);
1777 void Verifier::visitShuffleVectorInst(ShuffleVectorInst &SV) {
1778 Assert1(ShuffleVectorInst::isValidOperands(SV.getOperand(0), SV.getOperand(1),
1780 "Invalid shufflevector operands!", &SV);
1781 visitInstruction(SV);
1784 void Verifier::visitGetElementPtrInst(GetElementPtrInst &GEP) {
1785 Type *TargetTy = GEP.getPointerOperandType()->getScalarType();
1787 Assert1(isa<PointerType>(TargetTy),
1788 "GEP base pointer is not a vector or a vector of pointers", &GEP);
1789 Assert1(cast<PointerType>(TargetTy)->getElementType()->isSized(),
1790 "GEP into unsized type!", &GEP);
1791 Assert1(GEP.getPointerOperandType()->isVectorTy() ==
1792 GEP.getType()->isVectorTy(), "Vector GEP must return a vector value",
1795 SmallVector<Value*, 16> Idxs(GEP.idx_begin(), GEP.idx_end());
1797 GetElementPtrInst::getIndexedType(GEP.getPointerOperandType(), Idxs);
1798 Assert1(ElTy, "Invalid indices for GEP pointer type!", &GEP);
1800 Assert2(GEP.getType()->getScalarType()->isPointerTy() &&
1801 cast<PointerType>(GEP.getType()->getScalarType())->getElementType()
1802 == ElTy, "GEP is not of right type for indices!", &GEP, ElTy);
1804 if (GEP.getPointerOperandType()->isVectorTy()) {
1805 // Additional checks for vector GEPs.
1806 unsigned GepWidth = GEP.getPointerOperandType()->getVectorNumElements();
1807 Assert1(GepWidth == GEP.getType()->getVectorNumElements(),
1808 "Vector GEP result width doesn't match operand's", &GEP);
1809 for (unsigned i = 0, e = Idxs.size(); i != e; ++i) {
1810 Type *IndexTy = Idxs[i]->getType();
1811 Assert1(IndexTy->isVectorTy(),
1812 "Vector GEP must have vector indices!", &GEP);
1813 unsigned IndexWidth = IndexTy->getVectorNumElements();
1814 Assert1(IndexWidth == GepWidth, "Invalid GEP index vector width", &GEP);
1817 visitInstruction(GEP);
1820 static bool isContiguous(const ConstantRange &A, const ConstantRange &B) {
1821 return A.getUpper() == B.getLower() || A.getLower() == B.getUpper();
1824 void Verifier::visitLoadInst(LoadInst &LI) {
1825 PointerType *PTy = dyn_cast<PointerType>(LI.getOperand(0)->getType());
1826 Assert1(PTy, "Load operand must be a pointer.", &LI);
1827 Type *ElTy = PTy->getElementType();
1828 Assert2(ElTy == LI.getType(),
1829 "Load result type does not match pointer operand type!", &LI, ElTy);
1830 if (LI.isAtomic()) {
1831 Assert1(LI.getOrdering() != Release && LI.getOrdering() != AcquireRelease,
1832 "Load cannot have Release ordering", &LI);
1833 Assert1(LI.getAlignment() != 0,
1834 "Atomic load must specify explicit alignment", &LI);
1835 if (!ElTy->isPointerTy()) {
1836 Assert2(ElTy->isIntegerTy(),
1837 "atomic load operand must have integer type!",
1839 unsigned Size = ElTy->getPrimitiveSizeInBits();
1840 Assert2(Size >= 8 && !(Size & (Size - 1)),
1841 "atomic load operand must be power-of-two byte-sized integer",
1845 Assert1(LI.getSynchScope() == CrossThread,
1846 "Non-atomic load cannot have SynchronizationScope specified", &LI);
1849 if (MDNode *Range = LI.getMetadata(LLVMContext::MD_range)) {
1850 unsigned NumOperands = Range->getNumOperands();
1851 Assert1(NumOperands % 2 == 0, "Unfinished range!", Range);
1852 unsigned NumRanges = NumOperands / 2;
1853 Assert1(NumRanges >= 1, "It should have at least one range!", Range);
1855 ConstantRange LastRange(1); // Dummy initial value
1856 for (unsigned i = 0; i < NumRanges; ++i) {
1857 ConstantInt *Low = dyn_cast<ConstantInt>(Range->getOperand(2*i));
1858 Assert1(Low, "The lower limit must be an integer!", Low);
1859 ConstantInt *High = dyn_cast<ConstantInt>(Range->getOperand(2*i + 1));
1860 Assert1(High, "The upper limit must be an integer!", High);
1861 Assert1(High->getType() == Low->getType() &&
1862 High->getType() == ElTy, "Range types must match load type!",
1865 APInt HighV = High->getValue();
1866 APInt LowV = Low->getValue();
1867 ConstantRange CurRange(LowV, HighV);
1868 Assert1(!CurRange.isEmptySet() && !CurRange.isFullSet(),
1869 "Range must not be empty!", Range);
1871 Assert1(CurRange.intersectWith(LastRange).isEmptySet(),
1872 "Intervals are overlapping", Range);
1873 Assert1(LowV.sgt(LastRange.getLower()), "Intervals are not in order",
1875 Assert1(!isContiguous(CurRange, LastRange), "Intervals are contiguous",
1878 LastRange = ConstantRange(LowV, HighV);
1880 if (NumRanges > 2) {
1882 dyn_cast<ConstantInt>(Range->getOperand(0))->getValue();
1884 dyn_cast<ConstantInt>(Range->getOperand(1))->getValue();
1885 ConstantRange FirstRange(FirstLow, FirstHigh);
1886 Assert1(FirstRange.intersectWith(LastRange).isEmptySet(),
1887 "Intervals are overlapping", Range);
1888 Assert1(!isContiguous(FirstRange, LastRange), "Intervals are contiguous",
1895 visitInstruction(LI);
1898 void Verifier::visitStoreInst(StoreInst &SI) {
1899 PointerType *PTy = dyn_cast<PointerType>(SI.getOperand(1)->getType());
1900 Assert1(PTy, "Store operand must be a pointer.", &SI);
1901 Type *ElTy = PTy->getElementType();
1902 Assert2(ElTy == SI.getOperand(0)->getType(),
1903 "Stored value type does not match pointer operand type!",
1905 if (SI.isAtomic()) {
1906 Assert1(SI.getOrdering() != Acquire && SI.getOrdering() != AcquireRelease,
1907 "Store cannot have Acquire ordering", &SI);
1908 Assert1(SI.getAlignment() != 0,
1909 "Atomic store must specify explicit alignment", &SI);
1910 if (!ElTy->isPointerTy()) {
1911 Assert2(ElTy->isIntegerTy(),
1912 "atomic store operand must have integer type!",
1914 unsigned Size = ElTy->getPrimitiveSizeInBits();
1915 Assert2(Size >= 8 && !(Size & (Size - 1)),
1916 "atomic store operand must be power-of-two byte-sized integer",
1920 Assert1(SI.getSynchScope() == CrossThread,
1921 "Non-atomic store cannot have SynchronizationScope specified", &SI);
1923 visitInstruction(SI);
1926 void Verifier::visitAllocaInst(AllocaInst &AI) {
1927 SmallPtrSet<const Type*, 4> Visited;
1928 PointerType *PTy = AI.getType();
1929 Assert1(PTy->getAddressSpace() == 0,
1930 "Allocation instruction pointer not in the generic address space!",
1932 Assert1(PTy->getElementType()->isSized(&Visited), "Cannot allocate unsized type",
1934 Assert1(AI.getArraySize()->getType()->isIntegerTy(),
1935 "Alloca array size must have integer type", &AI);
1937 visitInstruction(AI);
1940 void Verifier::visitAtomicCmpXchgInst(AtomicCmpXchgInst &CXI) {
1942 // FIXME: more conditions???
1943 Assert1(CXI.getSuccessOrdering() != NotAtomic,
1944 "cmpxchg instructions must be atomic.", &CXI);
1945 Assert1(CXI.getFailureOrdering() != NotAtomic,
1946 "cmpxchg instructions must be atomic.", &CXI);
1947 Assert1(CXI.getSuccessOrdering() != Unordered,
1948 "cmpxchg instructions cannot be unordered.", &CXI);
1949 Assert1(CXI.getFailureOrdering() != Unordered,
1950 "cmpxchg instructions cannot be unordered.", &CXI);
1951 Assert1(CXI.getSuccessOrdering() >= CXI.getFailureOrdering(),
1952 "cmpxchg instructions be at least as constrained on success as fail",
1954 Assert1(CXI.getFailureOrdering() != Release &&
1955 CXI.getFailureOrdering() != AcquireRelease,
1956 "cmpxchg failure ordering cannot include release semantics", &CXI);
1958 PointerType *PTy = dyn_cast<PointerType>(CXI.getOperand(0)->getType());
1959 Assert1(PTy, "First cmpxchg operand must be a pointer.", &CXI);
1960 Type *ElTy = PTy->getElementType();
1961 Assert2(ElTy->isIntegerTy(),
1962 "cmpxchg operand must have integer type!",
1964 unsigned Size = ElTy->getPrimitiveSizeInBits();
1965 Assert2(Size >= 8 && !(Size & (Size - 1)),
1966 "cmpxchg operand must be power-of-two byte-sized integer",
1968 Assert2(ElTy == CXI.getOperand(1)->getType(),
1969 "Expected value type does not match pointer operand type!",
1971 Assert2(ElTy == CXI.getOperand(2)->getType(),
1972 "Stored value type does not match pointer operand type!",
1974 visitInstruction(CXI);
1977 void Verifier::visitAtomicRMWInst(AtomicRMWInst &RMWI) {
1978 Assert1(RMWI.getOrdering() != NotAtomic,
1979 "atomicrmw instructions must be atomic.", &RMWI);
1980 Assert1(RMWI.getOrdering() != Unordered,
1981 "atomicrmw instructions cannot be unordered.", &RMWI);
1982 PointerType *PTy = dyn_cast<PointerType>(RMWI.getOperand(0)->getType());
1983 Assert1(PTy, "First atomicrmw operand must be a pointer.", &RMWI);
1984 Type *ElTy = PTy->getElementType();
1985 Assert2(ElTy->isIntegerTy(),
1986 "atomicrmw operand must have integer type!",
1988 unsigned Size = ElTy->getPrimitiveSizeInBits();
1989 Assert2(Size >= 8 && !(Size & (Size - 1)),
1990 "atomicrmw operand must be power-of-two byte-sized integer",
1992 Assert2(ElTy == RMWI.getOperand(1)->getType(),
1993 "Argument value type does not match pointer operand type!",
1995 Assert1(AtomicRMWInst::FIRST_BINOP <= RMWI.getOperation() &&
1996 RMWI.getOperation() <= AtomicRMWInst::LAST_BINOP,
1997 "Invalid binary operation!", &RMWI);
1998 visitInstruction(RMWI);
2001 void Verifier::visitFenceInst(FenceInst &FI) {
2002 const AtomicOrdering Ordering = FI.getOrdering();
2003 Assert1(Ordering == Acquire || Ordering == Release ||
2004 Ordering == AcquireRelease || Ordering == SequentiallyConsistent,
2005 "fence instructions may only have "
2006 "acquire, release, acq_rel, or seq_cst ordering.", &FI);
2007 visitInstruction(FI);
2010 void Verifier::visitExtractValueInst(ExtractValueInst &EVI) {
2011 Assert1(ExtractValueInst::getIndexedType(EVI.getAggregateOperand()->getType(),
2012 EVI.getIndices()) ==
2014 "Invalid ExtractValueInst operands!", &EVI);
2016 visitInstruction(EVI);
2019 void Verifier::visitInsertValueInst(InsertValueInst &IVI) {
2020 Assert1(ExtractValueInst::getIndexedType(IVI.getAggregateOperand()->getType(),
2021 IVI.getIndices()) ==
2022 IVI.getOperand(1)->getType(),
2023 "Invalid InsertValueInst operands!", &IVI);
2025 visitInstruction(IVI);
2028 void Verifier::visitLandingPadInst(LandingPadInst &LPI) {
2029 BasicBlock *BB = LPI.getParent();
2031 // The landingpad instruction is ill-formed if it doesn't have any clauses and
2033 Assert1(LPI.getNumClauses() > 0 || LPI.isCleanup(),
2034 "LandingPadInst needs at least one clause or to be a cleanup.", &LPI);
2036 // The landingpad instruction defines its parent as a landing pad block. The
2037 // landing pad block may be branched to only by the unwind edge of an invoke.
2038 for (pred_iterator I = pred_begin(BB), E = pred_end(BB); I != E; ++I) {
2039 const InvokeInst *II = dyn_cast<InvokeInst>((*I)->getTerminator());
2040 Assert1(II && II->getUnwindDest() == BB && II->getNormalDest() != BB,
2041 "Block containing LandingPadInst must be jumped to "
2042 "only by the unwind edge of an invoke.", &LPI);
2045 // The landingpad instruction must be the first non-PHI instruction in the
2047 Assert1(LPI.getParent()->getLandingPadInst() == &LPI,
2048 "LandingPadInst not the first non-PHI instruction in the block.",
2051 // The personality functions for all landingpad instructions within the same
2052 // function should match.
2054 Assert1(LPI.getPersonalityFn() == PersonalityFn,
2055 "Personality function doesn't match others in function", &LPI);
2056 PersonalityFn = LPI.getPersonalityFn();
2058 // All operands must be constants.
2059 Assert1(isa<Constant>(PersonalityFn), "Personality function is not constant!",
2061 for (unsigned i = 0, e = LPI.getNumClauses(); i < e; ++i) {
2062 Value *Clause = LPI.getClause(i);
2063 Assert1(isa<Constant>(Clause), "Clause is not constant!", &LPI);
2064 if (LPI.isCatch(i)) {
2065 Assert1(isa<PointerType>(Clause->getType()),
2066 "Catch operand does not have pointer type!", &LPI);
2068 Assert1(LPI.isFilter(i), "Clause is neither catch nor filter!", &LPI);
2069 Assert1(isa<ConstantArray>(Clause) || isa<ConstantAggregateZero>(Clause),
2070 "Filter operand is not an array of constants!", &LPI);
2074 visitInstruction(LPI);
2077 void Verifier::verifyDominatesUse(Instruction &I, unsigned i) {
2078 Instruction *Op = cast<Instruction>(I.getOperand(i));
2079 // If the we have an invalid invoke, don't try to compute the dominance.
2080 // We already reject it in the invoke specific checks and the dominance
2081 // computation doesn't handle multiple edges.
2082 if (InvokeInst *II = dyn_cast<InvokeInst>(Op)) {
2083 if (II->getNormalDest() == II->getUnwindDest())
2087 const Use &U = I.getOperandUse(i);
2088 Assert2(InstsInThisBlock.count(Op) || DT.dominates(Op, U),
2089 "Instruction does not dominate all uses!", Op, &I);
2092 /// verifyInstruction - Verify that an instruction is well formed.
2094 void Verifier::visitInstruction(Instruction &I) {
2095 BasicBlock *BB = I.getParent();
2096 Assert1(BB, "Instruction not embedded in basic block!", &I);
2098 if (!isa<PHINode>(I)) { // Check that non-phi nodes are not self referential
2099 for (User *U : I.users()) {
2100 Assert1(U != (User*)&I || !DT.isReachableFromEntry(BB),
2101 "Only PHI nodes may reference their own value!", &I);
2105 // Check that void typed values don't have names
2106 Assert1(!I.getType()->isVoidTy() || !I.hasName(),
2107 "Instruction has a name, but provides a void value!", &I);
2109 // Check that the return value of the instruction is either void or a legal
2111 Assert1(I.getType()->isVoidTy() ||
2112 I.getType()->isFirstClassType(),
2113 "Instruction returns a non-scalar type!", &I);
2115 // Check that the instruction doesn't produce metadata. Calls are already
2116 // checked against the callee type.
2117 Assert1(!I.getType()->isMetadataTy() ||
2118 isa<CallInst>(I) || isa<InvokeInst>(I),
2119 "Invalid use of metadata!", &I);
2121 // Check that all uses of the instruction, if they are instructions
2122 // themselves, actually have parent basic blocks. If the use is not an
2123 // instruction, it is an error!
2124 for (Use &U : I.uses()) {
2125 if (Instruction *Used = dyn_cast<Instruction>(U.getUser()))
2126 Assert2(Used->getParent() != nullptr, "Instruction referencing"
2127 " instruction not embedded in a basic block!", &I, Used);
2129 CheckFailed("Use of instruction is not an instruction!", U);
2134 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
2135 Assert1(I.getOperand(i) != nullptr, "Instruction has null operand!", &I);
2137 // Check to make sure that only first-class-values are operands to
2139 if (!I.getOperand(i)->getType()->isFirstClassType()) {
2140 Assert1(0, "Instruction operands must be first-class values!", &I);
2143 if (Function *F = dyn_cast<Function>(I.getOperand(i))) {
2144 // Check to make sure that the "address of" an intrinsic function is never
2146 Assert1(!F->isIntrinsic() || i == (isa<CallInst>(I) ? e-1 : 0),
2147 "Cannot take the address of an intrinsic!", &I);
2148 Assert1(!F->isIntrinsic() || isa<CallInst>(I) ||
2149 F->getIntrinsicID() == Intrinsic::donothing,
2150 "Cannot invoke an intrinsinc other than donothing", &I);
2151 Assert1(F->getParent() == M, "Referencing function in another module!",
2153 } else if (BasicBlock *OpBB = dyn_cast<BasicBlock>(I.getOperand(i))) {
2154 Assert1(OpBB->getParent() == BB->getParent(),
2155 "Referring to a basic block in another function!", &I);
2156 } else if (Argument *OpArg = dyn_cast<Argument>(I.getOperand(i))) {
2157 Assert1(OpArg->getParent() == BB->getParent(),
2158 "Referring to an argument in another function!", &I);
2159 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(I.getOperand(i))) {
2160 Assert1(GV->getParent() == M, "Referencing global in another module!",
2162 } else if (isa<Instruction>(I.getOperand(i))) {
2163 verifyDominatesUse(I, i);
2164 } else if (isa<InlineAsm>(I.getOperand(i))) {
2165 Assert1((i + 1 == e && isa<CallInst>(I)) ||
2166 (i + 3 == e && isa<InvokeInst>(I)),
2167 "Cannot take the address of an inline asm!", &I);
2168 } else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(I.getOperand(i))) {
2169 if (CE->getType()->isPtrOrPtrVectorTy()) {
2170 // If we have a ConstantExpr pointer, we need to see if it came from an
2171 // illegal bitcast (inttoptr <constant int> )
2172 SmallVector<const ConstantExpr *, 4> Stack;
2173 SmallPtrSet<const ConstantExpr *, 4> Visited;
2174 Stack.push_back(CE);
2176 while (!Stack.empty()) {
2177 const ConstantExpr *V = Stack.pop_back_val();
2178 if (!Visited.insert(V))
2181 VerifyConstantExprBitcastType(V);
2183 for (unsigned I = 0, N = V->getNumOperands(); I != N; ++I) {
2184 if (ConstantExpr *Op = dyn_cast<ConstantExpr>(V->getOperand(I)))
2185 Stack.push_back(Op);
2192 if (MDNode *MD = I.getMetadata(LLVMContext::MD_fpmath)) {
2193 Assert1(I.getType()->isFPOrFPVectorTy(),
2194 "fpmath requires a floating point result!", &I);
2195 Assert1(MD->getNumOperands() == 1, "fpmath takes one operand!", &I);
2196 Value *Op0 = MD->getOperand(0);
2197 if (ConstantFP *CFP0 = dyn_cast_or_null<ConstantFP>(Op0)) {
2198 APFloat Accuracy = CFP0->getValueAPF();
2199 Assert1(Accuracy.isFiniteNonZero() && !Accuracy.isNegative(),
2200 "fpmath accuracy not a positive number!", &I);
2202 Assert1(false, "invalid fpmath accuracy!", &I);
2206 MDNode *MD = I.getMetadata(LLVMContext::MD_range);
2207 Assert1(!MD || isa<LoadInst>(I), "Ranges are only for loads!", &I);
2209 InstsInThisBlock.insert(&I);
2212 /// VerifyIntrinsicType - Verify that the specified type (which comes from an
2213 /// intrinsic argument or return value) matches the type constraints specified
2214 /// by the .td file (e.g. an "any integer" argument really is an integer).
2216 /// This return true on error but does not print a message.
2217 bool Verifier::VerifyIntrinsicType(Type *Ty,
2218 ArrayRef<Intrinsic::IITDescriptor> &Infos,
2219 SmallVectorImpl<Type*> &ArgTys) {
2220 using namespace Intrinsic;
2222 // If we ran out of descriptors, there are too many arguments.
2223 if (Infos.empty()) return true;
2224 IITDescriptor D = Infos.front();
2225 Infos = Infos.slice(1);
2228 case IITDescriptor::Void: return !Ty->isVoidTy();
2229 case IITDescriptor::VarArg: return true;
2230 case IITDescriptor::MMX: return !Ty->isX86_MMXTy();
2231 case IITDescriptor::Metadata: return !Ty->isMetadataTy();
2232 case IITDescriptor::Half: return !Ty->isHalfTy();
2233 case IITDescriptor::Float: return !Ty->isFloatTy();
2234 case IITDescriptor::Double: return !Ty->isDoubleTy();
2235 case IITDescriptor::Integer: return !Ty->isIntegerTy(D.Integer_Width);
2236 case IITDescriptor::Vector: {
2237 VectorType *VT = dyn_cast<VectorType>(Ty);
2238 return !VT || VT->getNumElements() != D.Vector_Width ||
2239 VerifyIntrinsicType(VT->getElementType(), Infos, ArgTys);
2241 case IITDescriptor::Pointer: {
2242 PointerType *PT = dyn_cast<PointerType>(Ty);
2243 return !PT || PT->getAddressSpace() != D.Pointer_AddressSpace ||
2244 VerifyIntrinsicType(PT->getElementType(), Infos, ArgTys);
2247 case IITDescriptor::Struct: {
2248 StructType *ST = dyn_cast<StructType>(Ty);
2249 if (!ST || ST->getNumElements() != D.Struct_NumElements)
2252 for (unsigned i = 0, e = D.Struct_NumElements; i != e; ++i)
2253 if (VerifyIntrinsicType(ST->getElementType(i), Infos, ArgTys))
2258 case IITDescriptor::Argument:
2259 // Two cases here - If this is the second occurrence of an argument, verify
2260 // that the later instance matches the previous instance.
2261 if (D.getArgumentNumber() < ArgTys.size())
2262 return Ty != ArgTys[D.getArgumentNumber()];
2264 // Otherwise, if this is the first instance of an argument, record it and
2265 // verify the "Any" kind.
2266 assert(D.getArgumentNumber() == ArgTys.size() && "Table consistency error");
2267 ArgTys.push_back(Ty);
2269 switch (D.getArgumentKind()) {
2270 case IITDescriptor::AK_AnyInteger: return !Ty->isIntOrIntVectorTy();
2271 case IITDescriptor::AK_AnyFloat: return !Ty->isFPOrFPVectorTy();
2272 case IITDescriptor::AK_AnyVector: return !isa<VectorType>(Ty);
2273 case IITDescriptor::AK_AnyPointer: return !isa<PointerType>(Ty);
2275 llvm_unreachable("all argument kinds not covered");
2277 case IITDescriptor::ExtendArgument: {
2278 // This may only be used when referring to a previous vector argument.
2279 if (D.getArgumentNumber() >= ArgTys.size())
2282 Type *NewTy = ArgTys[D.getArgumentNumber()];
2283 if (VectorType *VTy = dyn_cast<VectorType>(NewTy))
2284 NewTy = VectorType::getExtendedElementVectorType(VTy);
2285 else if (IntegerType *ITy = dyn_cast<IntegerType>(NewTy))
2286 NewTy = IntegerType::get(ITy->getContext(), 2 * ITy->getBitWidth());
2292 case IITDescriptor::TruncArgument: {
2293 // This may only be used when referring to a previous vector argument.
2294 if (D.getArgumentNumber() >= ArgTys.size())
2297 Type *NewTy = ArgTys[D.getArgumentNumber()];
2298 if (VectorType *VTy = dyn_cast<VectorType>(NewTy))
2299 NewTy = VectorType::getTruncatedElementVectorType(VTy);
2300 else if (IntegerType *ITy = dyn_cast<IntegerType>(NewTy))
2301 NewTy = IntegerType::get(ITy->getContext(), ITy->getBitWidth() / 2);
2307 case IITDescriptor::HalfVecArgument:
2308 // This may only be used when referring to a previous vector argument.
2309 return D.getArgumentNumber() >= ArgTys.size() ||
2310 !isa<VectorType>(ArgTys[D.getArgumentNumber()]) ||
2311 VectorType::getHalfElementsVectorType(
2312 cast<VectorType>(ArgTys[D.getArgumentNumber()])) != Ty;
2314 llvm_unreachable("unhandled");
2317 /// \brief Verify if the intrinsic has variable arguments.
2318 /// This method is intended to be called after all the fixed arguments have been
2321 /// This method returns true on error and does not print an error message.
2323 Verifier::VerifyIntrinsicIsVarArg(bool isVarArg,
2324 ArrayRef<Intrinsic::IITDescriptor> &Infos) {
2325 using namespace Intrinsic;
2327 // If there are no descriptors left, then it can't be a vararg.
2329 return isVarArg ? true : false;
2331 // There should be only one descriptor remaining at this point.
2332 if (Infos.size() != 1)
2335 // Check and verify the descriptor.
2336 IITDescriptor D = Infos.front();
2337 Infos = Infos.slice(1);
2338 if (D.Kind == IITDescriptor::VarArg)
2339 return isVarArg ? false : true;
2344 /// visitIntrinsicFunction - Allow intrinsics to be verified in different ways.
2346 void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) {
2347 Function *IF = CI.getCalledFunction();
2348 Assert1(IF->isDeclaration(), "Intrinsic functions should never be defined!",
2351 // Verify that the intrinsic prototype lines up with what the .td files
2353 FunctionType *IFTy = IF->getFunctionType();
2354 bool IsVarArg = IFTy->isVarArg();
2356 SmallVector<Intrinsic::IITDescriptor, 8> Table;
2357 getIntrinsicInfoTableEntries(ID, Table);
2358 ArrayRef<Intrinsic::IITDescriptor> TableRef = Table;
2360 SmallVector<Type *, 4> ArgTys;
2361 Assert1(!VerifyIntrinsicType(IFTy->getReturnType(), TableRef, ArgTys),
2362 "Intrinsic has incorrect return type!", IF);
2363 for (unsigned i = 0, e = IFTy->getNumParams(); i != e; ++i)
2364 Assert1(!VerifyIntrinsicType(IFTy->getParamType(i), TableRef, ArgTys),
2365 "Intrinsic has incorrect argument type!", IF);
2367 // Verify if the intrinsic call matches the vararg property.
2369 Assert1(!VerifyIntrinsicIsVarArg(IsVarArg, TableRef),
2370 "Intrinsic was not defined with variable arguments!", IF);
2372 Assert1(!VerifyIntrinsicIsVarArg(IsVarArg, TableRef),
2373 "Callsite was not defined with variable arguments!", IF);
2375 // All descriptors should be absorbed by now.
2376 Assert1(TableRef.empty(), "Intrinsic has too few arguments!", IF);
2378 // Now that we have the intrinsic ID and the actual argument types (and we
2379 // know they are legal for the intrinsic!) get the intrinsic name through the
2380 // usual means. This allows us to verify the mangling of argument types into
2382 const std::string ExpectedName = Intrinsic::getName(ID, ArgTys);
2383 Assert1(ExpectedName == IF->getName(),
2384 "Intrinsic name not mangled correctly for type arguments! "
2385 "Should be: " + ExpectedName, IF);
2387 // If the intrinsic takes MDNode arguments, verify that they are either global
2388 // or are local to *this* function.
2389 for (unsigned i = 0, e = CI.getNumArgOperands(); i != e; ++i)
2390 if (MDNode *MD = dyn_cast<MDNode>(CI.getArgOperand(i)))
2391 visitMDNode(*MD, CI.getParent()->getParent());
2396 case Intrinsic::ctlz: // llvm.ctlz
2397 case Intrinsic::cttz: // llvm.cttz
2398 Assert1(isa<ConstantInt>(CI.getArgOperand(1)),
2399 "is_zero_undef argument of bit counting intrinsics must be a "
2400 "constant int", &CI);
2402 case Intrinsic::dbg_declare: { // llvm.dbg.declare
2403 Assert1(CI.getArgOperand(0) && isa<MDNode>(CI.getArgOperand(0)),
2404 "invalid llvm.dbg.declare intrinsic call 1", &CI);
2405 MDNode *MD = cast<MDNode>(CI.getArgOperand(0));
2406 Assert1(MD->getNumOperands() == 1,
2407 "invalid llvm.dbg.declare intrinsic call 2", &CI);
2409 case Intrinsic::memcpy:
2410 case Intrinsic::memmove:
2411 case Intrinsic::memset:
2412 Assert1(isa<ConstantInt>(CI.getArgOperand(3)),
2413 "alignment argument of memory intrinsics must be a constant int",
2415 Assert1(isa<ConstantInt>(CI.getArgOperand(4)),
2416 "isvolatile argument of memory intrinsics must be a constant int",
2419 case Intrinsic::gcroot:
2420 case Intrinsic::gcwrite:
2421 case Intrinsic::gcread:
2422 if (ID == Intrinsic::gcroot) {
2424 dyn_cast<AllocaInst>(CI.getArgOperand(0)->stripPointerCasts());
2425 Assert1(AI, "llvm.gcroot parameter #1 must be an alloca.", &CI);
2426 Assert1(isa<Constant>(CI.getArgOperand(1)),
2427 "llvm.gcroot parameter #2 must be a constant.", &CI);
2428 if (!AI->getType()->getElementType()->isPointerTy()) {
2429 Assert1(!isa<ConstantPointerNull>(CI.getArgOperand(1)),
2430 "llvm.gcroot parameter #1 must either be a pointer alloca, "
2431 "or argument #2 must be a non-null constant.", &CI);
2435 Assert1(CI.getParent()->getParent()->hasGC(),
2436 "Enclosing function does not use GC.", &CI);
2438 case Intrinsic::init_trampoline:
2439 Assert1(isa<Function>(CI.getArgOperand(1)->stripPointerCasts()),
2440 "llvm.init_trampoline parameter #2 must resolve to a function.",
2443 case Intrinsic::prefetch:
2444 Assert1(isa<ConstantInt>(CI.getArgOperand(1)) &&
2445 isa<ConstantInt>(CI.getArgOperand(2)) &&
2446 cast<ConstantInt>(CI.getArgOperand(1))->getZExtValue() < 2 &&
2447 cast<ConstantInt>(CI.getArgOperand(2))->getZExtValue() < 4,
2448 "invalid arguments to llvm.prefetch",
2451 case Intrinsic::stackprotector:
2452 Assert1(isa<AllocaInst>(CI.getArgOperand(1)->stripPointerCasts()),
2453 "llvm.stackprotector parameter #2 must resolve to an alloca.",
2456 case Intrinsic::lifetime_start:
2457 case Intrinsic::lifetime_end:
2458 case Intrinsic::invariant_start:
2459 Assert1(isa<ConstantInt>(CI.getArgOperand(0)),
2460 "size argument of memory use markers must be a constant integer",
2463 case Intrinsic::invariant_end:
2464 Assert1(isa<ConstantInt>(CI.getArgOperand(1)),
2465 "llvm.invariant.end parameter #2 must be a constant integer", &CI);
2470 void DebugInfoVerifier::verifyDebugInfo() {
2471 if (!VerifyDebugInfo)
2474 DebugInfoFinder Finder;
2475 Finder.processModule(*M);
2476 processInstructions(Finder);
2478 // Verify Debug Info.
2480 // NOTE: The loud braces are necessary for MSVC compatibility.
2481 for (DICompileUnit CU : Finder.compile_units()) {
2482 Assert1(CU.Verify(), "DICompileUnit does not Verify!", CU);
2484 for (DISubprogram S : Finder.subprograms()) {
2485 Assert1(S.Verify(), "DISubprogram does not Verify!", S);
2487 for (DIGlobalVariable GV : Finder.global_variables()) {
2488 Assert1(GV.Verify(), "DIGlobalVariable does not Verify!", GV);
2490 for (DIType T : Finder.types()) {
2491 Assert1(T.Verify(), "DIType does not Verify!", T);
2493 for (DIScope S : Finder.scopes()) {
2494 Assert1(S.Verify(), "DIScope does not Verify!", S);
2498 void DebugInfoVerifier::processInstructions(DebugInfoFinder &Finder) {
2499 for (const Function &F : *M)
2500 for (auto I = inst_begin(&F), E = inst_end(&F); I != E; ++I) {
2501 if (MDNode *MD = I->getMetadata(LLVMContext::MD_dbg))
2502 Finder.processLocation(*M, DILocation(MD));
2503 if (const CallInst *CI = dyn_cast<CallInst>(&*I))
2504 processCallInst(Finder, *CI);
2508 void DebugInfoVerifier::processCallInst(DebugInfoFinder &Finder,
2509 const CallInst &CI) {
2510 if (Function *F = CI.getCalledFunction())
2511 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
2513 case Intrinsic::dbg_declare:
2514 Finder.processDeclare(*M, cast<DbgDeclareInst>(&CI));
2516 case Intrinsic::dbg_value:
2517 Finder.processValue(*M, cast<DbgValueInst>(&CI));
2524 //===----------------------------------------------------------------------===//
2525 // Implement the public interfaces to this file...
2526 //===----------------------------------------------------------------------===//
2528 bool llvm::verifyFunction(const Function &f, raw_ostream *OS) {
2529 Function &F = const_cast<Function &>(f);
2530 assert(!F.isDeclaration() && "Cannot verify external functions");
2532 raw_null_ostream NullStr;
2533 Verifier V(OS ? *OS : NullStr);
2535 // Note that this function's return value is inverted from what you would
2536 // expect of a function called "verify".
2537 return !V.verify(F);
2540 bool llvm::verifyModule(const Module &M, raw_ostream *OS) {
2541 raw_null_ostream NullStr;
2542 Verifier V(OS ? *OS : NullStr);
2544 bool Broken = false;
2545 for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I)
2546 if (!I->isDeclaration())
2547 Broken |= !V.verify(*I);
2549 // Note that this function's return value is inverted from what you would
2550 // expect of a function called "verify".
2551 DebugInfoVerifier DIV(OS ? *OS : NullStr);
2552 return !V.verify(M) || !DIV.verify(M) || Broken;
2556 struct VerifierLegacyPass : public FunctionPass {
2562 VerifierLegacyPass() : FunctionPass(ID), FatalErrors(true) {
2563 initializeVerifierLegacyPassPass(*PassRegistry::getPassRegistry());
2565 explicit VerifierLegacyPass(bool FatalErrors)
2566 : FunctionPass(ID), V(dbgs()), FatalErrors(FatalErrors) {
2567 initializeVerifierLegacyPassPass(*PassRegistry::getPassRegistry());
2570 bool runOnFunction(Function &F) override {
2571 if (!V.verify(F) && FatalErrors)
2572 report_fatal_error("Broken function found, compilation aborted!");
2577 bool doFinalization(Module &M) override {
2578 if (!V.verify(M) && FatalErrors)
2579 report_fatal_error("Broken module found, compilation aborted!");
2584 void getAnalysisUsage(AnalysisUsage &AU) const override {
2585 AU.setPreservesAll();
2588 struct DebugInfoVerifierLegacyPass : public ModulePass {
2591 DebugInfoVerifier V;
2594 DebugInfoVerifierLegacyPass() : ModulePass(ID), FatalErrors(true) {
2595 initializeDebugInfoVerifierLegacyPassPass(*PassRegistry::getPassRegistry());
2597 explicit DebugInfoVerifierLegacyPass(bool FatalErrors)
2598 : ModulePass(ID), V(dbgs()), FatalErrors(FatalErrors) {
2599 initializeDebugInfoVerifierLegacyPassPass(*PassRegistry::getPassRegistry());
2602 bool runOnModule(Module &M) override {
2603 if (!V.verify(M) && FatalErrors)
2604 report_fatal_error("Broken debug info found, compilation aborted!");
2609 void getAnalysisUsage(AnalysisUsage &AU) const override {
2610 AU.setPreservesAll();
2615 char VerifierLegacyPass::ID = 0;
2616 INITIALIZE_PASS(VerifierLegacyPass, "verify", "Module Verifier", false, false)
2618 char DebugInfoVerifierLegacyPass::ID = 0;
2619 INITIALIZE_PASS(DebugInfoVerifierLegacyPass, "verify-di", "Debug Info Verifier",
2622 FunctionPass *llvm::createVerifierPass(bool FatalErrors) {
2623 return new VerifierLegacyPass(FatalErrors);
2626 ModulePass *llvm::createDebugInfoVerifierPass(bool FatalErrors) {
2627 return new DebugInfoVerifierLegacyPass(FatalErrors);
2630 PreservedAnalyses VerifierPass::run(Module *M) {
2631 if (verifyModule(*M, &dbgs()) && FatalErrors)
2632 report_fatal_error("Broken module found, compilation aborted!");
2634 return PreservedAnalyses::all();
2637 PreservedAnalyses VerifierPass::run(Function *F) {
2638 if (verifyFunction(*F, &dbgs()) && FatalErrors)
2639 report_fatal_error("Broken function found, compilation aborted!");
2641 return PreservedAnalyses::all();