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/DebugInfo.h"
55 #include "llvm/IR/CallingConv.h"
56 #include "llvm/IR/Constants.h"
57 #include "llvm/IR/DataLayout.h"
58 #include "llvm/IR/DerivedTypes.h"
59 #include "llvm/IR/Dominators.h"
60 #include "llvm/IR/InlineAsm.h"
61 #include "llvm/IR/IntrinsicInst.h"
62 #include "llvm/IR/LLVMContext.h"
63 #include "llvm/IR/Metadata.h"
64 #include "llvm/IR/Module.h"
65 #include "llvm/IR/PassManager.h"
66 #include "llvm/InstVisitor.h"
67 #include "llvm/Pass.h"
68 #include "llvm/Support/CFG.h"
69 #include "llvm/Support/CallSite.h"
70 #include "llvm/Support/CommandLine.h"
71 #include "llvm/Support/ConstantRange.h"
72 #include "llvm/Support/Debug.h"
73 #include "llvm/Support/ErrorHandling.h"
74 #include "llvm/Support/raw_ostream.h"
79 static cl::opt<bool> DisableDebugInfoVerifier("disable-debug-info-verifier",
83 class Verifier : public InstVisitor<Verifier> {
84 friend class InstVisitor<Verifier>;
92 /// \brief When verifying a basic block, keep track of all of the
93 /// instructions we have seen so far.
95 /// This allows us to do efficient dominance checks for the case when an
96 /// instruction has an operand that is an instruction in the same block.
97 SmallPtrSet<Instruction *, 16> InstsInThisBlock;
99 /// \brief Keep track of the metadata nodes that have been checked already.
100 SmallPtrSet<MDNode *, 32> MDNodes;
102 /// \brief The personality function referenced by the LandingPadInsts.
103 /// All LandingPadInsts within the same function must use the same
104 /// personality function.
105 const Value *PersonalityFn;
107 /// \brief Finder keeps track of all debug info MDNodes in a Module.
108 DebugInfoFinder Finder;
110 /// \brief Track the brokenness of the module while recursively visiting.
114 explicit Verifier(raw_ostream &OS = dbgs())
115 : OS(OS), M(0), Context(0), DL(0), PersonalityFn(0), Broken(false) {}
117 bool verify(const Function &F) {
119 Context = &M->getContext();
121 // First ensure the function is well-enough formed to compute dominance
124 OS << "Function '" << F.getName()
125 << "' does not contain an entry block!\n";
128 for (Function::const_iterator I = F.begin(), E = F.end(); I != E; ++I) {
129 if (I->empty() || !I->back().isTerminator()) {
130 OS << "Basic Block in function '" << F.getName()
131 << "' does not have terminator!\n";
132 I->printAsOperand(OS, true);
138 // Now directly compute a dominance tree. We don't rely on the pass
139 // manager to provide this as it isolates us from a potentially
140 // out-of-date dominator tree and makes it significantly more complex to
141 // run this code outside of a pass manager.
142 // FIXME: It's really gross that we have to cast away constness here.
143 DT.recalculate(const_cast<Function &>(F));
147 // FIXME: We strip const here because the inst visitor strips const.
148 visit(const_cast<Function &>(F));
149 InstsInThisBlock.clear();
152 if (!DisableDebugInfoVerifier)
153 // Verify Debug Info.
159 bool verify(const Module &M) {
161 Context = &M.getContext();
165 // Scan through, checking all of the external function's linkage now...
166 for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) {
167 visitGlobalValue(*I);
169 // Check to make sure function prototypes are okay.
170 if (I->isDeclaration())
174 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
176 visitGlobalVariable(*I);
178 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
180 visitGlobalAlias(*I);
182 for (Module::const_named_metadata_iterator I = M.named_metadata_begin(),
183 E = M.named_metadata_end();
185 visitNamedMDNode(*I);
188 visitModuleIdents(M);
190 if (!DisableDebugInfoVerifier) {
192 Finder.processModule(M);
193 // Verify Debug Info.
201 // Verification methods...
202 void visitGlobalValue(const GlobalValue &GV);
203 void visitGlobalVariable(const GlobalVariable &GV);
204 void visitGlobalAlias(const GlobalAlias &GA);
205 void visitNamedMDNode(const NamedMDNode &NMD);
206 void visitMDNode(MDNode &MD, Function *F);
207 void visitModuleIdents(const Module &M);
208 void visitModuleFlags(const Module &M);
209 void visitModuleFlag(const MDNode *Op,
210 DenseMap<const MDString *, const MDNode *> &SeenIDs,
211 SmallVectorImpl<const MDNode *> &Requirements);
212 void visitFunction(const Function &F);
213 void visitBasicBlock(BasicBlock &BB);
215 // InstVisitor overrides...
216 using InstVisitor<Verifier>::visit;
217 void visit(Instruction &I);
219 void visitTruncInst(TruncInst &I);
220 void visitZExtInst(ZExtInst &I);
221 void visitSExtInst(SExtInst &I);
222 void visitFPTruncInst(FPTruncInst &I);
223 void visitFPExtInst(FPExtInst &I);
224 void visitFPToUIInst(FPToUIInst &I);
225 void visitFPToSIInst(FPToSIInst &I);
226 void visitUIToFPInst(UIToFPInst &I);
227 void visitSIToFPInst(SIToFPInst &I);
228 void visitIntToPtrInst(IntToPtrInst &I);
229 void visitPtrToIntInst(PtrToIntInst &I);
230 void visitBitCastInst(BitCastInst &I);
231 void visitAddrSpaceCastInst(AddrSpaceCastInst &I);
232 void visitPHINode(PHINode &PN);
233 void visitBinaryOperator(BinaryOperator &B);
234 void visitICmpInst(ICmpInst &IC);
235 void visitFCmpInst(FCmpInst &FC);
236 void visitExtractElementInst(ExtractElementInst &EI);
237 void visitInsertElementInst(InsertElementInst &EI);
238 void visitShuffleVectorInst(ShuffleVectorInst &EI);
239 void visitVAArgInst(VAArgInst &VAA) { visitInstruction(VAA); }
240 void visitCallInst(CallInst &CI);
241 void visitInvokeInst(InvokeInst &II);
242 void visitGetElementPtrInst(GetElementPtrInst &GEP);
243 void visitLoadInst(LoadInst &LI);
244 void visitStoreInst(StoreInst &SI);
245 void verifyDominatesUse(Instruction &I, unsigned i);
246 void visitInstruction(Instruction &I);
247 void visitTerminatorInst(TerminatorInst &I);
248 void visitBranchInst(BranchInst &BI);
249 void visitReturnInst(ReturnInst &RI);
250 void visitSwitchInst(SwitchInst &SI);
251 void visitIndirectBrInst(IndirectBrInst &BI);
252 void visitSelectInst(SelectInst &SI);
253 void visitUserOp1(Instruction &I);
254 void visitUserOp2(Instruction &I) { visitUserOp1(I); }
255 void visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI);
256 void visitAtomicCmpXchgInst(AtomicCmpXchgInst &CXI);
257 void visitAtomicRMWInst(AtomicRMWInst &RMWI);
258 void visitFenceInst(FenceInst &FI);
259 void visitAllocaInst(AllocaInst &AI);
260 void visitExtractValueInst(ExtractValueInst &EVI);
261 void visitInsertValueInst(InsertValueInst &IVI);
262 void visitLandingPadInst(LandingPadInst &LPI);
264 void VerifyCallSite(CallSite CS);
265 bool PerformTypeCheck(Intrinsic::ID ID, Function *F, Type *Ty, int VT,
266 unsigned ArgNo, std::string &Suffix);
267 bool VerifyIntrinsicType(Type *Ty, ArrayRef<Intrinsic::IITDescriptor> &Infos,
268 SmallVectorImpl<Type *> &ArgTys);
269 bool VerifyIntrinsicIsVarArg(bool isVarArg,
270 ArrayRef<Intrinsic::IITDescriptor> &Infos);
271 bool VerifyAttributeCount(AttributeSet Attrs, unsigned Params);
272 void VerifyAttributeTypes(AttributeSet Attrs, unsigned Idx, bool isFunction,
274 void VerifyParameterAttrs(AttributeSet Attrs, unsigned Idx, Type *Ty,
275 bool isReturnValue, const Value *V);
276 void VerifyFunctionAttrs(FunctionType *FT, AttributeSet Attrs,
279 void VerifyBitcastType(const Value *V, Type *DestTy, Type *SrcTy);
280 void VerifyConstantExprBitcastType(const ConstantExpr *CE);
282 void verifyDebugInfo();
284 void WriteValue(const Value *V) {
287 if (isa<Instruction>(V)) {
290 V->printAsOperand(OS, true, M);
295 void WriteType(Type *T) {
301 // CheckFailed - A check failed, so print out the condition and the message
302 // that failed. This provides a nice place to put a breakpoint if you want
303 // to see why something is not correct.
304 void CheckFailed(const Twine &Message, const Value *V1 = 0,
305 const Value *V2 = 0, const Value *V3 = 0,
306 const Value *V4 = 0) {
307 OS << Message.str() << "\n";
315 void CheckFailed(const Twine &Message, const Value *V1, Type *T2,
316 const Value *V3 = 0) {
317 OS << Message.str() << "\n";
324 void CheckFailed(const Twine &Message, Type *T1, Type *T2 = 0, Type *T3 = 0) {
325 OS << Message.str() << "\n";
332 } // End anonymous namespace
334 // Assert - We know that cond should be true, if not print an error message.
335 #define Assert(C, M) \
336 do { if (!(C)) { CheckFailed(M); return; } } while (0)
337 #define Assert1(C, M, V1) \
338 do { if (!(C)) { CheckFailed(M, V1); return; } } while (0)
339 #define Assert2(C, M, V1, V2) \
340 do { if (!(C)) { CheckFailed(M, V1, V2); return; } } while (0)
341 #define Assert3(C, M, V1, V2, V3) \
342 do { if (!(C)) { CheckFailed(M, V1, V2, V3); return; } } while (0)
343 #define Assert4(C, M, V1, V2, V3, V4) \
344 do { if (!(C)) { CheckFailed(M, V1, V2, V3, V4); return; } } while (0)
346 void Verifier::visit(Instruction &I) {
347 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
348 Assert1(I.getOperand(i) != 0, "Operand is null", &I);
349 InstVisitor<Verifier>::visit(I);
353 void Verifier::visitGlobalValue(const GlobalValue &GV) {
354 Assert1(!GV.isDeclaration() ||
355 GV.isMaterializable() ||
356 GV.hasExternalLinkage() ||
357 GV.hasExternalWeakLinkage() ||
358 (isa<GlobalAlias>(GV) &&
359 (GV.hasLocalLinkage() || GV.hasWeakLinkage())),
360 "Global is external, but doesn't have external or weak linkage!",
363 Assert1(!GV.hasAppendingLinkage() || isa<GlobalVariable>(GV),
364 "Only global variables can have appending linkage!", &GV);
366 if (GV.hasAppendingLinkage()) {
367 const GlobalVariable *GVar = dyn_cast<GlobalVariable>(&GV);
368 Assert1(GVar && GVar->getType()->getElementType()->isArrayTy(),
369 "Only global arrays can have appending linkage!", GVar);
373 void Verifier::visitGlobalVariable(const GlobalVariable &GV) {
374 if (GV.hasInitializer()) {
375 Assert1(GV.getInitializer()->getType() == GV.getType()->getElementType(),
376 "Global variable initializer type does not match global "
377 "variable type!", &GV);
379 // If the global has common linkage, it must have a zero initializer and
380 // cannot be constant.
381 if (GV.hasCommonLinkage()) {
382 Assert1(GV.getInitializer()->isNullValue(),
383 "'common' global must have a zero initializer!", &GV);
384 Assert1(!GV.isConstant(), "'common' global may not be marked constant!",
388 Assert1(GV.hasExternalLinkage() || GV.hasExternalWeakLinkage(),
389 "invalid linkage type for global declaration", &GV);
392 if (GV.hasName() && (GV.getName() == "llvm.global_ctors" ||
393 GV.getName() == "llvm.global_dtors")) {
394 Assert1(!GV.hasInitializer() || GV.hasAppendingLinkage(),
395 "invalid linkage for intrinsic global variable", &GV);
396 // Don't worry about emitting an error for it not being an array,
397 // visitGlobalValue will complain on appending non-array.
398 if (ArrayType *ATy = dyn_cast<ArrayType>(GV.getType())) {
399 StructType *STy = dyn_cast<StructType>(ATy->getElementType());
400 PointerType *FuncPtrTy =
401 FunctionType::get(Type::getVoidTy(*Context), false)->getPointerTo();
402 Assert1(STy && STy->getNumElements() == 2 &&
403 STy->getTypeAtIndex(0u)->isIntegerTy(32) &&
404 STy->getTypeAtIndex(1) == FuncPtrTy,
405 "wrong type for intrinsic global variable", &GV);
409 if (GV.hasName() && (GV.getName() == "llvm.used" ||
410 GV.getName() == "llvm.compiler.used")) {
411 Assert1(!GV.hasInitializer() || GV.hasAppendingLinkage(),
412 "invalid linkage for intrinsic global variable", &GV);
413 Type *GVType = GV.getType()->getElementType();
414 if (ArrayType *ATy = dyn_cast<ArrayType>(GVType)) {
415 PointerType *PTy = dyn_cast<PointerType>(ATy->getElementType());
416 Assert1(PTy, "wrong type for intrinsic global variable", &GV);
417 if (GV.hasInitializer()) {
418 const Constant *Init = GV.getInitializer();
419 const ConstantArray *InitArray = dyn_cast<ConstantArray>(Init);
420 Assert1(InitArray, "wrong initalizer for intrinsic global variable",
422 for (unsigned i = 0, e = InitArray->getNumOperands(); i != e; ++i) {
423 Value *V = Init->getOperand(i)->stripPointerCastsNoFollowAliases();
425 isa<GlobalVariable>(V) || isa<Function>(V) || isa<GlobalAlias>(V),
426 "invalid llvm.used member", V);
427 Assert1(V->hasName(), "members of llvm.used must be named", V);
433 Assert1(!GV.hasDLLImportStorageClass() ||
434 (GV.isDeclaration() && GV.hasExternalLinkage()) ||
435 GV.hasAvailableExternallyLinkage(),
436 "Global is marked as dllimport, but not external", &GV);
438 if (!GV.hasInitializer()) {
439 visitGlobalValue(GV);
443 // Walk any aggregate initializers looking for bitcasts between address spaces
444 SmallPtrSet<const Value *, 4> Visited;
445 SmallVector<const Value *, 4> WorkStack;
446 WorkStack.push_back(cast<Value>(GV.getInitializer()));
448 while (!WorkStack.empty()) {
449 const Value *V = WorkStack.pop_back_val();
450 if (!Visited.insert(V))
453 if (const User *U = dyn_cast<User>(V)) {
454 for (unsigned I = 0, N = U->getNumOperands(); I != N; ++I)
455 WorkStack.push_back(U->getOperand(I));
458 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
459 VerifyConstantExprBitcastType(CE);
465 visitGlobalValue(GV);
468 void Verifier::visitGlobalAlias(const GlobalAlias &GA) {
469 Assert1(!GA.getName().empty(),
470 "Alias name cannot be empty!", &GA);
471 Assert1(GlobalAlias::isValidLinkage(GA.getLinkage()),
472 "Alias should have external or external weak linkage!", &GA);
473 Assert1(GA.getAliasee(),
474 "Aliasee cannot be NULL!", &GA);
475 Assert1(GA.getType() == GA.getAliasee()->getType(),
476 "Alias and aliasee types should match!", &GA);
477 Assert1(!GA.hasUnnamedAddr(), "Alias cannot have unnamed_addr!", &GA);
479 const Constant *Aliasee = GA.getAliasee();
481 if (!isa<GlobalValue>(Aliasee)) {
482 const ConstantExpr *CE = dyn_cast<ConstantExpr>(Aliasee);
484 (CE->getOpcode() == Instruction::BitCast ||
485 CE->getOpcode() == Instruction::AddrSpaceCast ||
486 CE->getOpcode() == Instruction::GetElementPtr) &&
487 isa<GlobalValue>(CE->getOperand(0)),
488 "Aliasee should be either GlobalValue, bitcast or "
489 "addrspacecast of GlobalValue",
492 if (CE->getOpcode() == Instruction::BitCast) {
493 unsigned SrcAS = CE->getOperand(0)->getType()->getPointerAddressSpace();
494 unsigned DstAS = CE->getType()->getPointerAddressSpace();
496 Assert1(SrcAS == DstAS,
497 "Alias bitcasts cannot be between different address spaces",
502 const GlobalValue* Resolved = GA.resolveAliasedGlobal(/*stopOnWeak*/ false);
504 "Aliasing chain should end with function or global variable", &GA);
506 visitGlobalValue(GA);
509 void Verifier::visitNamedMDNode(const NamedMDNode &NMD) {
510 for (unsigned i = 0, e = NMD.getNumOperands(); i != e; ++i) {
511 MDNode *MD = NMD.getOperand(i);
515 Assert1(!MD->isFunctionLocal(),
516 "Named metadata operand cannot be function local!", MD);
521 void Verifier::visitMDNode(MDNode &MD, Function *F) {
522 // Only visit each node once. Metadata can be mutually recursive, so this
523 // avoids infinite recursion here, as well as being an optimization.
524 if (!MDNodes.insert(&MD))
527 for (unsigned i = 0, e = MD.getNumOperands(); i != e; ++i) {
528 Value *Op = MD.getOperand(i);
531 if (isa<Constant>(Op) || isa<MDString>(Op))
533 if (MDNode *N = dyn_cast<MDNode>(Op)) {
534 Assert2(MD.isFunctionLocal() || !N->isFunctionLocal(),
535 "Global metadata operand cannot be function local!", &MD, N);
539 Assert2(MD.isFunctionLocal(), "Invalid operand for global metadata!", &MD, Op);
541 // If this was an instruction, bb, or argument, verify that it is in the
542 // function that we expect.
543 Function *ActualF = 0;
544 if (Instruction *I = dyn_cast<Instruction>(Op))
545 ActualF = I->getParent()->getParent();
546 else if (BasicBlock *BB = dyn_cast<BasicBlock>(Op))
547 ActualF = BB->getParent();
548 else if (Argument *A = dyn_cast<Argument>(Op))
549 ActualF = A->getParent();
550 assert(ActualF && "Unimplemented function local metadata case!");
552 Assert2(ActualF == F, "function-local metadata used in wrong function",
557 void Verifier::visitModuleIdents(const Module &M) {
558 const NamedMDNode *Idents = M.getNamedMetadata("llvm.ident");
562 // llvm.ident takes a list of metadata entry. Each entry has only one string.
563 // Scan each llvm.ident entry and make sure that this requirement is met.
564 for (unsigned i = 0, e = Idents->getNumOperands(); i != e; ++i) {
565 const MDNode *N = Idents->getOperand(i);
566 Assert1(N->getNumOperands() == 1,
567 "incorrect number of operands in llvm.ident metadata", N);
568 Assert1(isa<MDString>(N->getOperand(0)),
569 ("invalid value for llvm.ident metadata entry operand"
570 "(the operand should be a string)"),
575 void Verifier::visitModuleFlags(const Module &M) {
576 const NamedMDNode *Flags = M.getModuleFlagsMetadata();
579 // Scan each flag, and track the flags and requirements.
580 DenseMap<const MDString*, const MDNode*> SeenIDs;
581 SmallVector<const MDNode*, 16> Requirements;
582 for (unsigned I = 0, E = Flags->getNumOperands(); I != E; ++I) {
583 visitModuleFlag(Flags->getOperand(I), SeenIDs, Requirements);
586 // Validate that the requirements in the module are valid.
587 for (unsigned I = 0, E = Requirements.size(); I != E; ++I) {
588 const MDNode *Requirement = Requirements[I];
589 const MDString *Flag = cast<MDString>(Requirement->getOperand(0));
590 const Value *ReqValue = Requirement->getOperand(1);
592 const MDNode *Op = SeenIDs.lookup(Flag);
594 CheckFailed("invalid requirement on flag, flag is not present in module",
599 if (Op->getOperand(2) != ReqValue) {
600 CheckFailed(("invalid requirement on flag, "
601 "flag does not have the required value"),
609 Verifier::visitModuleFlag(const MDNode *Op,
610 DenseMap<const MDString *, const MDNode *> &SeenIDs,
611 SmallVectorImpl<const MDNode *> &Requirements) {
612 // Each module flag should have three arguments, the merge behavior (a
613 // constant int), the flag ID (an MDString), and the value.
614 Assert1(Op->getNumOperands() == 3,
615 "incorrect number of operands in module flag", Op);
616 ConstantInt *Behavior = dyn_cast<ConstantInt>(Op->getOperand(0));
617 MDString *ID = dyn_cast<MDString>(Op->getOperand(1));
619 "invalid behavior operand in module flag (expected constant integer)",
621 unsigned BehaviorValue = Behavior->getZExtValue();
623 "invalid ID operand in module flag (expected metadata string)",
626 // Sanity check the values for behaviors with additional requirements.
627 switch (BehaviorValue) {
630 "invalid behavior operand in module flag (unexpected constant)",
635 case Module::Warning:
636 case Module::Override:
637 // These behavior types accept any value.
640 case Module::Require: {
641 // The value should itself be an MDNode with two operands, a flag ID (an
642 // MDString), and a value.
643 MDNode *Value = dyn_cast<MDNode>(Op->getOperand(2));
644 Assert1(Value && Value->getNumOperands() == 2,
645 "invalid value for 'require' module flag (expected metadata pair)",
647 Assert1(isa<MDString>(Value->getOperand(0)),
648 ("invalid value for 'require' module flag "
649 "(first value operand should be a string)"),
650 Value->getOperand(0));
652 // Append it to the list of requirements, to check once all module flags are
654 Requirements.push_back(Value);
659 case Module::AppendUnique: {
660 // These behavior types require the operand be an MDNode.
661 Assert1(isa<MDNode>(Op->getOperand(2)),
662 "invalid value for 'append'-type module flag "
663 "(expected a metadata node)", Op->getOperand(2));
668 // Unless this is a "requires" flag, check the ID is unique.
669 if (BehaviorValue != Module::Require) {
670 bool Inserted = SeenIDs.insert(std::make_pair(ID, Op)).second;
672 "module flag identifiers must be unique (or of 'require' type)",
677 void Verifier::VerifyAttributeTypes(AttributeSet Attrs, unsigned Idx,
678 bool isFunction, const Value *V) {
680 for (unsigned I = 0, E = Attrs.getNumSlots(); I != E; ++I)
681 if (Attrs.getSlotIndex(I) == Idx) {
686 assert(Slot != ~0U && "Attribute set inconsistency!");
688 for (AttributeSet::iterator I = Attrs.begin(Slot), E = Attrs.end(Slot);
690 if (I->isStringAttribute())
693 if (I->getKindAsEnum() == Attribute::NoReturn ||
694 I->getKindAsEnum() == Attribute::NoUnwind ||
695 I->getKindAsEnum() == Attribute::NoInline ||
696 I->getKindAsEnum() == Attribute::AlwaysInline ||
697 I->getKindAsEnum() == Attribute::OptimizeForSize ||
698 I->getKindAsEnum() == Attribute::StackProtect ||
699 I->getKindAsEnum() == Attribute::StackProtectReq ||
700 I->getKindAsEnum() == Attribute::StackProtectStrong ||
701 I->getKindAsEnum() == Attribute::NoRedZone ||
702 I->getKindAsEnum() == Attribute::NoImplicitFloat ||
703 I->getKindAsEnum() == Attribute::Naked ||
704 I->getKindAsEnum() == Attribute::InlineHint ||
705 I->getKindAsEnum() == Attribute::StackAlignment ||
706 I->getKindAsEnum() == Attribute::UWTable ||
707 I->getKindAsEnum() == Attribute::NonLazyBind ||
708 I->getKindAsEnum() == Attribute::ReturnsTwice ||
709 I->getKindAsEnum() == Attribute::SanitizeAddress ||
710 I->getKindAsEnum() == Attribute::SanitizeThread ||
711 I->getKindAsEnum() == Attribute::SanitizeMemory ||
712 I->getKindAsEnum() == Attribute::MinSize ||
713 I->getKindAsEnum() == Attribute::NoDuplicate ||
714 I->getKindAsEnum() == Attribute::Builtin ||
715 I->getKindAsEnum() == Attribute::NoBuiltin ||
716 I->getKindAsEnum() == Attribute::Cold ||
717 I->getKindAsEnum() == Attribute::OptimizeNone) {
719 CheckFailed("Attribute '" + I->getAsString() +
720 "' only applies to functions!", V);
723 } else if (I->getKindAsEnum() == Attribute::ReadOnly ||
724 I->getKindAsEnum() == Attribute::ReadNone) {
726 CheckFailed("Attribute '" + I->getAsString() +
727 "' does not apply to function returns");
730 } else if (isFunction) {
731 CheckFailed("Attribute '" + I->getAsString() +
732 "' does not apply to functions!", V);
738 // VerifyParameterAttrs - Check the given attributes for an argument or return
739 // value of the specified type. The value V is printed in error messages.
740 void Verifier::VerifyParameterAttrs(AttributeSet Attrs, unsigned Idx, Type *Ty,
741 bool isReturnValue, const Value *V) {
742 if (!Attrs.hasAttributes(Idx))
745 VerifyAttributeTypes(Attrs, Idx, false, V);
748 Assert1(!Attrs.hasAttribute(Idx, Attribute::ByVal) &&
749 !Attrs.hasAttribute(Idx, Attribute::Nest) &&
750 !Attrs.hasAttribute(Idx, Attribute::StructRet) &&
751 !Attrs.hasAttribute(Idx, Attribute::NoCapture) &&
752 !Attrs.hasAttribute(Idx, Attribute::Returned) &&
753 !Attrs.hasAttribute(Idx, Attribute::InAlloca),
754 "Attributes 'byval', 'inalloca', 'nest', 'sret', 'nocapture', and "
755 "'returned' do not apply to return values!", V);
757 // Check for mutually incompatible attributes. Only inreg is compatible with
759 unsigned AttrCount = 0;
760 AttrCount += Attrs.hasAttribute(Idx, Attribute::ByVal);
761 AttrCount += Attrs.hasAttribute(Idx, Attribute::InAlloca);
762 AttrCount += Attrs.hasAttribute(Idx, Attribute::StructRet) ||
763 Attrs.hasAttribute(Idx, Attribute::InReg);
764 AttrCount += Attrs.hasAttribute(Idx, Attribute::Nest);
765 Assert1(AttrCount <= 1, "Attributes 'byval', 'inalloca', 'inreg', 'nest', "
766 "and 'sret' are incompatible!", V);
768 Assert1(!(Attrs.hasAttribute(Idx, Attribute::InAlloca) &&
769 Attrs.hasAttribute(Idx, Attribute::ReadOnly)), "Attributes "
770 "'inalloca and readonly' are incompatible!", V);
772 Assert1(!(Attrs.hasAttribute(Idx, Attribute::StructRet) &&
773 Attrs.hasAttribute(Idx, Attribute::Returned)), "Attributes "
774 "'sret and returned' are incompatible!", V);
776 Assert1(!(Attrs.hasAttribute(Idx, Attribute::ZExt) &&
777 Attrs.hasAttribute(Idx, Attribute::SExt)), "Attributes "
778 "'zeroext and signext' are incompatible!", V);
780 Assert1(!(Attrs.hasAttribute(Idx, Attribute::ReadNone) &&
781 Attrs.hasAttribute(Idx, Attribute::ReadOnly)), "Attributes "
782 "'readnone and readonly' are incompatible!", V);
784 Assert1(!(Attrs.hasAttribute(Idx, Attribute::NoInline) &&
785 Attrs.hasAttribute(Idx, Attribute::AlwaysInline)), "Attributes "
786 "'noinline and alwaysinline' are incompatible!", V);
788 Assert1(!AttrBuilder(Attrs, Idx).
789 hasAttributes(AttributeFuncs::typeIncompatible(Ty, Idx), Idx),
790 "Wrong types for attribute: " +
791 AttributeFuncs::typeIncompatible(Ty, Idx).getAsString(Idx), V);
793 if (PointerType *PTy = dyn_cast<PointerType>(Ty)) {
794 if (!PTy->getElementType()->isSized()) {
795 Assert1(!Attrs.hasAttribute(Idx, Attribute::ByVal) &&
796 !Attrs.hasAttribute(Idx, Attribute::InAlloca),
797 "Attributes 'byval' and 'inalloca' do not support unsized types!",
801 Assert1(!Attrs.hasAttribute(Idx, Attribute::ByVal),
802 "Attribute 'byval' only applies to parameters with pointer type!",
807 // VerifyFunctionAttrs - Check parameter attributes against a function type.
808 // The value V is printed in error messages.
809 void Verifier::VerifyFunctionAttrs(FunctionType *FT, AttributeSet Attrs,
814 bool SawNest = false;
815 bool SawReturned = false;
817 for (unsigned i = 0, e = Attrs.getNumSlots(); i != e; ++i) {
818 unsigned Idx = Attrs.getSlotIndex(i);
822 Ty = FT->getReturnType();
823 else if (Idx-1 < FT->getNumParams())
824 Ty = FT->getParamType(Idx-1);
826 break; // VarArgs attributes, verified elsewhere.
828 VerifyParameterAttrs(Attrs, Idx, Ty, Idx == 0, V);
833 if (Attrs.hasAttribute(Idx, Attribute::Nest)) {
834 Assert1(!SawNest, "More than one parameter has attribute nest!", V);
838 if (Attrs.hasAttribute(Idx, Attribute::Returned)) {
839 Assert1(!SawReturned, "More than one parameter has attribute returned!",
841 Assert1(Ty->canLosslesslyBitCastTo(FT->getReturnType()), "Incompatible "
842 "argument and return types for 'returned' attribute", V);
846 if (Attrs.hasAttribute(Idx, Attribute::StructRet))
847 Assert1(Idx == 1, "Attribute sret is not on first parameter!", V);
849 if (Attrs.hasAttribute(Idx, Attribute::InAlloca)) {
850 Assert1(Idx == FT->getNumParams(),
851 "inalloca isn't on the last parameter!", V);
855 if (!Attrs.hasAttributes(AttributeSet::FunctionIndex))
858 VerifyAttributeTypes(Attrs, AttributeSet::FunctionIndex, true, V);
860 Assert1(!(Attrs.hasAttribute(AttributeSet::FunctionIndex,
861 Attribute::ReadNone) &&
862 Attrs.hasAttribute(AttributeSet::FunctionIndex,
863 Attribute::ReadOnly)),
864 "Attributes 'readnone and readonly' are incompatible!", V);
866 Assert1(!(Attrs.hasAttribute(AttributeSet::FunctionIndex,
867 Attribute::NoInline) &&
868 Attrs.hasAttribute(AttributeSet::FunctionIndex,
869 Attribute::AlwaysInline)),
870 "Attributes 'noinline and alwaysinline' are incompatible!", V);
872 if (Attrs.hasAttribute(AttributeSet::FunctionIndex,
873 Attribute::OptimizeNone)) {
874 Assert1(Attrs.hasAttribute(AttributeSet::FunctionIndex,
875 Attribute::NoInline),
876 "Attribute 'optnone' requires 'noinline'!", V);
878 Assert1(!Attrs.hasAttribute(AttributeSet::FunctionIndex,
879 Attribute::OptimizeForSize),
880 "Attributes 'optsize and optnone' are incompatible!", V);
882 Assert1(!Attrs.hasAttribute(AttributeSet::FunctionIndex,
884 "Attributes 'minsize and optnone' are incompatible!", V);
888 void Verifier::VerifyBitcastType(const Value *V, Type *DestTy, Type *SrcTy) {
889 // Get the size of the types in bits, we'll need this later
890 unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
891 unsigned DestBitSize = DestTy->getPrimitiveSizeInBits();
893 // BitCast implies a no-op cast of type only. No bits change.
894 // However, you can't cast pointers to anything but pointers.
895 Assert1(SrcTy->isPointerTy() == DestTy->isPointerTy(),
896 "Bitcast requires both operands to be pointer or neither", V);
897 Assert1(SrcBitSize == DestBitSize,
898 "Bitcast requires types of same width", V);
900 // Disallow aggregates.
901 Assert1(!SrcTy->isAggregateType(),
902 "Bitcast operand must not be aggregate", V);
903 Assert1(!DestTy->isAggregateType(),
904 "Bitcast type must not be aggregate", V);
906 // Without datalayout, assume all address spaces are the same size.
907 // Don't check if both types are not pointers.
908 // Skip casts between scalars and vectors.
910 !SrcTy->isPtrOrPtrVectorTy() ||
911 !DestTy->isPtrOrPtrVectorTy() ||
912 SrcTy->isVectorTy() != DestTy->isVectorTy()) {
916 unsigned SrcAS = SrcTy->getPointerAddressSpace();
917 unsigned DstAS = DestTy->getPointerAddressSpace();
919 Assert1(SrcAS == DstAS,
920 "Bitcasts between pointers of different address spaces is not legal."
921 "Use AddrSpaceCast instead.", V);
924 void Verifier::VerifyConstantExprBitcastType(const ConstantExpr *CE) {
925 if (CE->getOpcode() == Instruction::BitCast) {
926 Type *SrcTy = CE->getOperand(0)->getType();
927 Type *DstTy = CE->getType();
928 VerifyBitcastType(CE, DstTy, SrcTy);
932 bool Verifier::VerifyAttributeCount(AttributeSet Attrs, unsigned Params) {
933 if (Attrs.getNumSlots() == 0)
936 unsigned LastSlot = Attrs.getNumSlots() - 1;
937 unsigned LastIndex = Attrs.getSlotIndex(LastSlot);
938 if (LastIndex <= Params
939 || (LastIndex == AttributeSet::FunctionIndex
940 && (LastSlot == 0 || Attrs.getSlotIndex(LastSlot - 1) <= Params)))
946 // visitFunction - Verify that a function is ok.
948 void Verifier::visitFunction(const Function &F) {
949 // Check function arguments.
950 FunctionType *FT = F.getFunctionType();
951 unsigned NumArgs = F.arg_size();
953 Assert1(Context == &F.getContext(),
954 "Function context does not match Module context!", &F);
956 Assert1(!F.hasCommonLinkage(), "Functions may not have common linkage", &F);
957 Assert2(FT->getNumParams() == NumArgs,
958 "# formal arguments must match # of arguments for function type!",
960 Assert1(F.getReturnType()->isFirstClassType() ||
961 F.getReturnType()->isVoidTy() ||
962 F.getReturnType()->isStructTy(),
963 "Functions cannot return aggregate values!", &F);
965 Assert1(!F.hasStructRetAttr() || F.getReturnType()->isVoidTy(),
966 "Invalid struct return type!", &F);
968 AttributeSet Attrs = F.getAttributes();
970 Assert1(VerifyAttributeCount(Attrs, FT->getNumParams()),
971 "Attribute after last parameter!", &F);
973 // Check function attributes.
974 VerifyFunctionAttrs(FT, Attrs, &F);
976 // On function declarations/definitions, we do not support the builtin
977 // attribute. We do not check this in VerifyFunctionAttrs since that is
978 // checking for Attributes that can/can not ever be on functions.
979 Assert1(!Attrs.hasAttribute(AttributeSet::FunctionIndex,
981 "Attribute 'builtin' can only be applied to a callsite.", &F);
983 // Check that this function meets the restrictions on this calling convention.
984 switch (F.getCallingConv()) {
989 case CallingConv::Fast:
990 case CallingConv::Cold:
991 case CallingConv::X86_FastCall:
992 case CallingConv::X86_ThisCall:
993 case CallingConv::Intel_OCL_BI:
994 case CallingConv::PTX_Kernel:
995 case CallingConv::PTX_Device:
996 Assert1(!F.isVarArg(),
997 "Varargs functions must have C calling conventions!", &F);
1001 bool isLLVMdotName = F.getName().size() >= 5 &&
1002 F.getName().substr(0, 5) == "llvm.";
1004 // Check that the argument values match the function type for this function...
1006 for (Function::const_arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E;
1008 Assert2(I->getType() == FT->getParamType(i),
1009 "Argument value does not match function argument type!",
1010 I, FT->getParamType(i));
1011 Assert1(I->getType()->isFirstClassType(),
1012 "Function arguments must have first-class types!", I);
1014 Assert2(!I->getType()->isMetadataTy(),
1015 "Function takes metadata but isn't an intrinsic", I, &F);
1018 if (F.isMaterializable()) {
1019 // Function has a body somewhere we can't see.
1020 } else if (F.isDeclaration()) {
1021 Assert1(F.hasExternalLinkage() || F.hasExternalWeakLinkage(),
1022 "invalid linkage type for function declaration", &F);
1024 // Verify that this function (which has a body) is not named "llvm.*". It
1025 // is not legal to define intrinsics.
1026 Assert1(!isLLVMdotName, "llvm intrinsics cannot be defined!", &F);
1028 // Check the entry node
1029 const BasicBlock *Entry = &F.getEntryBlock();
1030 Assert1(pred_begin(Entry) == pred_end(Entry),
1031 "Entry block to function must not have predecessors!", Entry);
1033 // The address of the entry block cannot be taken, unless it is dead.
1034 if (Entry->hasAddressTaken()) {
1035 Assert1(!BlockAddress::lookup(Entry)->isConstantUsed(),
1036 "blockaddress may not be used with the entry block!", Entry);
1040 // If this function is actually an intrinsic, verify that it is only used in
1041 // direct call/invokes, never having its "address taken".
1042 if (F.getIntrinsicID()) {
1044 if (F.hasAddressTaken(&U))
1045 Assert1(0, "Invalid user of intrinsic instruction!", U);
1048 Assert1(!F.hasDLLImportStorageClass() ||
1049 (F.isDeclaration() && F.hasExternalLinkage()) ||
1050 F.hasAvailableExternallyLinkage(),
1051 "Function is marked as dllimport, but not external.", &F);
1054 // verifyBasicBlock - Verify that a basic block is well formed...
1056 void Verifier::visitBasicBlock(BasicBlock &BB) {
1057 InstsInThisBlock.clear();
1059 // Ensure that basic blocks have terminators!
1060 Assert1(BB.getTerminator(), "Basic Block does not have terminator!", &BB);
1062 // Check constraints that this basic block imposes on all of the PHI nodes in
1064 if (isa<PHINode>(BB.front())) {
1065 SmallVector<BasicBlock*, 8> Preds(pred_begin(&BB), pred_end(&BB));
1066 SmallVector<std::pair<BasicBlock*, Value*>, 8> Values;
1067 std::sort(Preds.begin(), Preds.end());
1069 for (BasicBlock::iterator I = BB.begin(); (PN = dyn_cast<PHINode>(I));++I) {
1070 // Ensure that PHI nodes have at least one entry!
1071 Assert1(PN->getNumIncomingValues() != 0,
1072 "PHI nodes must have at least one entry. If the block is dead, "
1073 "the PHI should be removed!", PN);
1074 Assert1(PN->getNumIncomingValues() == Preds.size(),
1075 "PHINode should have one entry for each predecessor of its "
1076 "parent basic block!", PN);
1078 // Get and sort all incoming values in the PHI node...
1080 Values.reserve(PN->getNumIncomingValues());
1081 for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i)
1082 Values.push_back(std::make_pair(PN->getIncomingBlock(i),
1083 PN->getIncomingValue(i)));
1084 std::sort(Values.begin(), Values.end());
1086 for (unsigned i = 0, e = Values.size(); i != e; ++i) {
1087 // Check to make sure that if there is more than one entry for a
1088 // particular basic block in this PHI node, that the incoming values are
1091 Assert4(i == 0 || Values[i].first != Values[i-1].first ||
1092 Values[i].second == Values[i-1].second,
1093 "PHI node has multiple entries for the same basic block with "
1094 "different incoming values!", PN, Values[i].first,
1095 Values[i].second, Values[i-1].second);
1097 // Check to make sure that the predecessors and PHI node entries are
1099 Assert3(Values[i].first == Preds[i],
1100 "PHI node entries do not match predecessors!", PN,
1101 Values[i].first, Preds[i]);
1107 void Verifier::visitTerminatorInst(TerminatorInst &I) {
1108 // Ensure that terminators only exist at the end of the basic block.
1109 Assert1(&I == I.getParent()->getTerminator(),
1110 "Terminator found in the middle of a basic block!", I.getParent());
1111 visitInstruction(I);
1114 void Verifier::visitBranchInst(BranchInst &BI) {
1115 if (BI.isConditional()) {
1116 Assert2(BI.getCondition()->getType()->isIntegerTy(1),
1117 "Branch condition is not 'i1' type!", &BI, BI.getCondition());
1119 visitTerminatorInst(BI);
1122 void Verifier::visitReturnInst(ReturnInst &RI) {
1123 Function *F = RI.getParent()->getParent();
1124 unsigned N = RI.getNumOperands();
1125 if (F->getReturnType()->isVoidTy())
1127 "Found return instr that returns non-void in Function of void "
1128 "return type!", &RI, F->getReturnType());
1130 Assert2(N == 1 && F->getReturnType() == RI.getOperand(0)->getType(),
1131 "Function return type does not match operand "
1132 "type of return inst!", &RI, F->getReturnType());
1134 // Check to make sure that the return value has necessary properties for
1136 visitTerminatorInst(RI);
1139 void Verifier::visitSwitchInst(SwitchInst &SI) {
1140 // Check to make sure that all of the constants in the switch instruction
1141 // have the same type as the switched-on value.
1142 Type *SwitchTy = SI.getCondition()->getType();
1143 SmallPtrSet<ConstantInt*, 32> Constants;
1144 for (SwitchInst::CaseIt i = SI.case_begin(), e = SI.case_end(); i != e; ++i) {
1145 Assert1(i.getCaseValue()->getType() == SwitchTy,
1146 "Switch constants must all be same type as switch value!", &SI);
1147 Assert2(Constants.insert(i.getCaseValue()),
1148 "Duplicate integer as switch case", &SI, i.getCaseValue());
1151 visitTerminatorInst(SI);
1154 void Verifier::visitIndirectBrInst(IndirectBrInst &BI) {
1155 Assert1(BI.getAddress()->getType()->isPointerTy(),
1156 "Indirectbr operand must have pointer type!", &BI);
1157 for (unsigned i = 0, e = BI.getNumDestinations(); i != e; ++i)
1158 Assert1(BI.getDestination(i)->getType()->isLabelTy(),
1159 "Indirectbr destinations must all have pointer type!", &BI);
1161 visitTerminatorInst(BI);
1164 void Verifier::visitSelectInst(SelectInst &SI) {
1165 Assert1(!SelectInst::areInvalidOperands(SI.getOperand(0), SI.getOperand(1),
1167 "Invalid operands for select instruction!", &SI);
1169 Assert1(SI.getTrueValue()->getType() == SI.getType(),
1170 "Select values must have same type as select instruction!", &SI);
1171 visitInstruction(SI);
1174 /// visitUserOp1 - User defined operators shouldn't live beyond the lifetime of
1175 /// a pass, if any exist, it's an error.
1177 void Verifier::visitUserOp1(Instruction &I) {
1178 Assert1(0, "User-defined operators should not live outside of a pass!", &I);
1181 void Verifier::visitTruncInst(TruncInst &I) {
1182 // Get the source and destination types
1183 Type *SrcTy = I.getOperand(0)->getType();
1184 Type *DestTy = I.getType();
1186 // Get the size of the types in bits, we'll need this later
1187 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
1188 unsigned DestBitSize = DestTy->getScalarSizeInBits();
1190 Assert1(SrcTy->isIntOrIntVectorTy(), "Trunc only operates on integer", &I);
1191 Assert1(DestTy->isIntOrIntVectorTy(), "Trunc only produces integer", &I);
1192 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1193 "trunc source and destination must both be a vector or neither", &I);
1194 Assert1(SrcBitSize > DestBitSize,"DestTy too big for Trunc", &I);
1196 visitInstruction(I);
1199 void Verifier::visitZExtInst(ZExtInst &I) {
1200 // Get the source and destination types
1201 Type *SrcTy = I.getOperand(0)->getType();
1202 Type *DestTy = I.getType();
1204 // Get the size of the types in bits, we'll need this later
1205 Assert1(SrcTy->isIntOrIntVectorTy(), "ZExt only operates on integer", &I);
1206 Assert1(DestTy->isIntOrIntVectorTy(), "ZExt only produces an integer", &I);
1207 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1208 "zext source and destination must both be a vector or neither", &I);
1209 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
1210 unsigned DestBitSize = DestTy->getScalarSizeInBits();
1212 Assert1(SrcBitSize < DestBitSize,"Type too small for ZExt", &I);
1214 visitInstruction(I);
1217 void Verifier::visitSExtInst(SExtInst &I) {
1218 // Get the source and destination types
1219 Type *SrcTy = I.getOperand(0)->getType();
1220 Type *DestTy = I.getType();
1222 // Get the size of the types in bits, we'll need this later
1223 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
1224 unsigned DestBitSize = DestTy->getScalarSizeInBits();
1226 Assert1(SrcTy->isIntOrIntVectorTy(), "SExt only operates on integer", &I);
1227 Assert1(DestTy->isIntOrIntVectorTy(), "SExt only produces an integer", &I);
1228 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1229 "sext source and destination must both be a vector or neither", &I);
1230 Assert1(SrcBitSize < DestBitSize,"Type too small for SExt", &I);
1232 visitInstruction(I);
1235 void Verifier::visitFPTruncInst(FPTruncInst &I) {
1236 // Get the source and destination types
1237 Type *SrcTy = I.getOperand(0)->getType();
1238 Type *DestTy = I.getType();
1239 // Get the size of the types in bits, we'll need this later
1240 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
1241 unsigned DestBitSize = DestTy->getScalarSizeInBits();
1243 Assert1(SrcTy->isFPOrFPVectorTy(),"FPTrunc only operates on FP", &I);
1244 Assert1(DestTy->isFPOrFPVectorTy(),"FPTrunc only produces an FP", &I);
1245 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1246 "fptrunc source and destination must both be a vector or neither",&I);
1247 Assert1(SrcBitSize > DestBitSize,"DestTy too big for FPTrunc", &I);
1249 visitInstruction(I);
1252 void Verifier::visitFPExtInst(FPExtInst &I) {
1253 // Get the source and destination types
1254 Type *SrcTy = I.getOperand(0)->getType();
1255 Type *DestTy = I.getType();
1257 // Get the size of the types in bits, we'll need this later
1258 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
1259 unsigned DestBitSize = DestTy->getScalarSizeInBits();
1261 Assert1(SrcTy->isFPOrFPVectorTy(),"FPExt only operates on FP", &I);
1262 Assert1(DestTy->isFPOrFPVectorTy(),"FPExt only produces an FP", &I);
1263 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1264 "fpext source and destination must both be a vector or neither", &I);
1265 Assert1(SrcBitSize < DestBitSize,"DestTy too small for FPExt", &I);
1267 visitInstruction(I);
1270 void Verifier::visitUIToFPInst(UIToFPInst &I) {
1271 // Get the source and destination types
1272 Type *SrcTy = I.getOperand(0)->getType();
1273 Type *DestTy = I.getType();
1275 bool SrcVec = SrcTy->isVectorTy();
1276 bool DstVec = DestTy->isVectorTy();
1278 Assert1(SrcVec == DstVec,
1279 "UIToFP source and dest must both be vector or scalar", &I);
1280 Assert1(SrcTy->isIntOrIntVectorTy(),
1281 "UIToFP source must be integer or integer vector", &I);
1282 Assert1(DestTy->isFPOrFPVectorTy(),
1283 "UIToFP result must be FP or FP vector", &I);
1285 if (SrcVec && DstVec)
1286 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1287 cast<VectorType>(DestTy)->getNumElements(),
1288 "UIToFP source and dest vector length mismatch", &I);
1290 visitInstruction(I);
1293 void Verifier::visitSIToFPInst(SIToFPInst &I) {
1294 // Get the source and destination types
1295 Type *SrcTy = I.getOperand(0)->getType();
1296 Type *DestTy = I.getType();
1298 bool SrcVec = SrcTy->isVectorTy();
1299 bool DstVec = DestTy->isVectorTy();
1301 Assert1(SrcVec == DstVec,
1302 "SIToFP source and dest must both be vector or scalar", &I);
1303 Assert1(SrcTy->isIntOrIntVectorTy(),
1304 "SIToFP source must be integer or integer vector", &I);
1305 Assert1(DestTy->isFPOrFPVectorTy(),
1306 "SIToFP result must be FP or FP vector", &I);
1308 if (SrcVec && DstVec)
1309 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1310 cast<VectorType>(DestTy)->getNumElements(),
1311 "SIToFP source and dest vector length mismatch", &I);
1313 visitInstruction(I);
1316 void Verifier::visitFPToUIInst(FPToUIInst &I) {
1317 // Get the source and destination types
1318 Type *SrcTy = I.getOperand(0)->getType();
1319 Type *DestTy = I.getType();
1321 bool SrcVec = SrcTy->isVectorTy();
1322 bool DstVec = DestTy->isVectorTy();
1324 Assert1(SrcVec == DstVec,
1325 "FPToUI source and dest must both be vector or scalar", &I);
1326 Assert1(SrcTy->isFPOrFPVectorTy(), "FPToUI source must be FP or FP vector",
1328 Assert1(DestTy->isIntOrIntVectorTy(),
1329 "FPToUI result must be integer or integer vector", &I);
1331 if (SrcVec && DstVec)
1332 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1333 cast<VectorType>(DestTy)->getNumElements(),
1334 "FPToUI source and dest vector length mismatch", &I);
1336 visitInstruction(I);
1339 void Verifier::visitFPToSIInst(FPToSIInst &I) {
1340 // Get the source and destination types
1341 Type *SrcTy = I.getOperand(0)->getType();
1342 Type *DestTy = I.getType();
1344 bool SrcVec = SrcTy->isVectorTy();
1345 bool DstVec = DestTy->isVectorTy();
1347 Assert1(SrcVec == DstVec,
1348 "FPToSI source and dest must both be vector or scalar", &I);
1349 Assert1(SrcTy->isFPOrFPVectorTy(),
1350 "FPToSI source must be FP or FP vector", &I);
1351 Assert1(DestTy->isIntOrIntVectorTy(),
1352 "FPToSI result must be integer or integer vector", &I);
1354 if (SrcVec && DstVec)
1355 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1356 cast<VectorType>(DestTy)->getNumElements(),
1357 "FPToSI source and dest vector length mismatch", &I);
1359 visitInstruction(I);
1362 void Verifier::visitPtrToIntInst(PtrToIntInst &I) {
1363 // Get the source and destination types
1364 Type *SrcTy = I.getOperand(0)->getType();
1365 Type *DestTy = I.getType();
1367 Assert1(SrcTy->getScalarType()->isPointerTy(),
1368 "PtrToInt source must be pointer", &I);
1369 Assert1(DestTy->getScalarType()->isIntegerTy(),
1370 "PtrToInt result must be integral", &I);
1371 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1372 "PtrToInt type mismatch", &I);
1374 if (SrcTy->isVectorTy()) {
1375 VectorType *VSrc = dyn_cast<VectorType>(SrcTy);
1376 VectorType *VDest = dyn_cast<VectorType>(DestTy);
1377 Assert1(VSrc->getNumElements() == VDest->getNumElements(),
1378 "PtrToInt Vector width mismatch", &I);
1381 visitInstruction(I);
1384 void Verifier::visitIntToPtrInst(IntToPtrInst &I) {
1385 // Get the source and destination types
1386 Type *SrcTy = I.getOperand(0)->getType();
1387 Type *DestTy = I.getType();
1389 Assert1(SrcTy->getScalarType()->isIntegerTy(),
1390 "IntToPtr source must be an integral", &I);
1391 Assert1(DestTy->getScalarType()->isPointerTy(),
1392 "IntToPtr result must be a pointer",&I);
1393 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1394 "IntToPtr type mismatch", &I);
1395 if (SrcTy->isVectorTy()) {
1396 VectorType *VSrc = dyn_cast<VectorType>(SrcTy);
1397 VectorType *VDest = dyn_cast<VectorType>(DestTy);
1398 Assert1(VSrc->getNumElements() == VDest->getNumElements(),
1399 "IntToPtr Vector width mismatch", &I);
1401 visitInstruction(I);
1404 void Verifier::visitBitCastInst(BitCastInst &I) {
1405 Type *SrcTy = I.getOperand(0)->getType();
1406 Type *DestTy = I.getType();
1407 VerifyBitcastType(&I, DestTy, SrcTy);
1408 visitInstruction(I);
1411 void Verifier::visitAddrSpaceCastInst(AddrSpaceCastInst &I) {
1412 Type *SrcTy = I.getOperand(0)->getType();
1413 Type *DestTy = I.getType();
1415 Assert1(SrcTy->isPtrOrPtrVectorTy(),
1416 "AddrSpaceCast source must be a pointer", &I);
1417 Assert1(DestTy->isPtrOrPtrVectorTy(),
1418 "AddrSpaceCast result must be a pointer", &I);
1419 Assert1(SrcTy->getPointerAddressSpace() != DestTy->getPointerAddressSpace(),
1420 "AddrSpaceCast must be between different address spaces", &I);
1421 if (SrcTy->isVectorTy())
1422 Assert1(SrcTy->getVectorNumElements() == DestTy->getVectorNumElements(),
1423 "AddrSpaceCast vector pointer number of elements mismatch", &I);
1424 visitInstruction(I);
1427 /// visitPHINode - Ensure that a PHI node is well formed.
1429 void Verifier::visitPHINode(PHINode &PN) {
1430 // Ensure that the PHI nodes are all grouped together at the top of the block.
1431 // This can be tested by checking whether the instruction before this is
1432 // either nonexistent (because this is begin()) or is a PHI node. If not,
1433 // then there is some other instruction before a PHI.
1434 Assert2(&PN == &PN.getParent()->front() ||
1435 isa<PHINode>(--BasicBlock::iterator(&PN)),
1436 "PHI nodes not grouped at top of basic block!",
1437 &PN, PN.getParent());
1439 // Check that all of the values of the PHI node have the same type as the
1440 // result, and that the incoming blocks are really basic blocks.
1441 for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i) {
1442 Assert1(PN.getType() == PN.getIncomingValue(i)->getType(),
1443 "PHI node operands are not the same type as the result!", &PN);
1446 // All other PHI node constraints are checked in the visitBasicBlock method.
1448 visitInstruction(PN);
1451 void Verifier::VerifyCallSite(CallSite CS) {
1452 Instruction *I = CS.getInstruction();
1454 Assert1(CS.getCalledValue()->getType()->isPointerTy(),
1455 "Called function must be a pointer!", I);
1456 PointerType *FPTy = cast<PointerType>(CS.getCalledValue()->getType());
1458 Assert1(FPTy->getElementType()->isFunctionTy(),
1459 "Called function is not pointer to function type!", I);
1460 FunctionType *FTy = cast<FunctionType>(FPTy->getElementType());
1462 // Verify that the correct number of arguments are being passed
1463 if (FTy->isVarArg())
1464 Assert1(CS.arg_size() >= FTy->getNumParams(),
1465 "Called function requires more parameters than were provided!",I);
1467 Assert1(CS.arg_size() == FTy->getNumParams(),
1468 "Incorrect number of arguments passed to called function!", I);
1470 // Verify that all arguments to the call match the function type.
1471 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
1472 Assert3(CS.getArgument(i)->getType() == FTy->getParamType(i),
1473 "Call parameter type does not match function signature!",
1474 CS.getArgument(i), FTy->getParamType(i), I);
1476 AttributeSet Attrs = CS.getAttributes();
1478 Assert1(VerifyAttributeCount(Attrs, CS.arg_size()),
1479 "Attribute after last parameter!", I);
1481 // Verify call attributes.
1482 VerifyFunctionAttrs(FTy, Attrs, I);
1484 if (FTy->isVarArg()) {
1485 // FIXME? is 'nest' even legal here?
1486 bool SawNest = false;
1487 bool SawReturned = false;
1489 for (unsigned Idx = 1; Idx < 1 + FTy->getNumParams(); ++Idx) {
1490 if (Attrs.hasAttribute(Idx, Attribute::Nest))
1492 if (Attrs.hasAttribute(Idx, Attribute::Returned))
1496 // Check attributes on the varargs part.
1497 for (unsigned Idx = 1 + FTy->getNumParams(); Idx <= CS.arg_size(); ++Idx) {
1498 Type *Ty = CS.getArgument(Idx-1)->getType();
1499 VerifyParameterAttrs(Attrs, Idx, Ty, false, I);
1501 if (Attrs.hasAttribute(Idx, Attribute::Nest)) {
1502 Assert1(!SawNest, "More than one parameter has attribute nest!", I);
1506 if (Attrs.hasAttribute(Idx, Attribute::Returned)) {
1507 Assert1(!SawReturned, "More than one parameter has attribute returned!",
1509 Assert1(Ty->canLosslesslyBitCastTo(FTy->getReturnType()),
1510 "Incompatible argument and return types for 'returned' "
1515 Assert1(!Attrs.hasAttribute(Idx, Attribute::StructRet),
1516 "Attribute 'sret' cannot be used for vararg call arguments!", I);
1518 if (Attrs.hasAttribute(Idx, Attribute::InAlloca))
1519 Assert1(Idx == CS.arg_size(), "inalloca isn't on the last argument!",
1524 // Verify that there's no metadata unless it's a direct call to an intrinsic.
1525 if (CS.getCalledFunction() == 0 ||
1526 !CS.getCalledFunction()->getName().startswith("llvm.")) {
1527 for (FunctionType::param_iterator PI = FTy->param_begin(),
1528 PE = FTy->param_end(); PI != PE; ++PI)
1529 Assert1(!(*PI)->isMetadataTy(),
1530 "Function has metadata parameter but isn't an intrinsic", I);
1533 visitInstruction(*I);
1536 void Verifier::visitCallInst(CallInst &CI) {
1537 VerifyCallSite(&CI);
1539 if (Function *F = CI.getCalledFunction())
1540 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
1541 visitIntrinsicFunctionCall(ID, CI);
1544 void Verifier::visitInvokeInst(InvokeInst &II) {
1545 VerifyCallSite(&II);
1547 // Verify that there is a landingpad instruction as the first non-PHI
1548 // instruction of the 'unwind' destination.
1549 Assert1(II.getUnwindDest()->isLandingPad(),
1550 "The unwind destination does not have a landingpad instruction!",&II);
1552 visitTerminatorInst(II);
1555 /// visitBinaryOperator - Check that both arguments to the binary operator are
1556 /// of the same type!
1558 void Verifier::visitBinaryOperator(BinaryOperator &B) {
1559 Assert1(B.getOperand(0)->getType() == B.getOperand(1)->getType(),
1560 "Both operands to a binary operator are not of the same type!", &B);
1562 switch (B.getOpcode()) {
1563 // Check that integer arithmetic operators are only used with
1564 // integral operands.
1565 case Instruction::Add:
1566 case Instruction::Sub:
1567 case Instruction::Mul:
1568 case Instruction::SDiv:
1569 case Instruction::UDiv:
1570 case Instruction::SRem:
1571 case Instruction::URem:
1572 Assert1(B.getType()->isIntOrIntVectorTy(),
1573 "Integer arithmetic operators only work with integral types!", &B);
1574 Assert1(B.getType() == B.getOperand(0)->getType(),
1575 "Integer arithmetic operators must have same type "
1576 "for operands and result!", &B);
1578 // Check that floating-point arithmetic operators are only used with
1579 // floating-point operands.
1580 case Instruction::FAdd:
1581 case Instruction::FSub:
1582 case Instruction::FMul:
1583 case Instruction::FDiv:
1584 case Instruction::FRem:
1585 Assert1(B.getType()->isFPOrFPVectorTy(),
1586 "Floating-point arithmetic operators only work with "
1587 "floating-point types!", &B);
1588 Assert1(B.getType() == B.getOperand(0)->getType(),
1589 "Floating-point arithmetic operators must have same type "
1590 "for operands and result!", &B);
1592 // Check that logical operators are only used with integral operands.
1593 case Instruction::And:
1594 case Instruction::Or:
1595 case Instruction::Xor:
1596 Assert1(B.getType()->isIntOrIntVectorTy(),
1597 "Logical operators only work with integral types!", &B);
1598 Assert1(B.getType() == B.getOperand(0)->getType(),
1599 "Logical operators must have same type for operands and result!",
1602 case Instruction::Shl:
1603 case Instruction::LShr:
1604 case Instruction::AShr:
1605 Assert1(B.getType()->isIntOrIntVectorTy(),
1606 "Shifts only work with integral types!", &B);
1607 Assert1(B.getType() == B.getOperand(0)->getType(),
1608 "Shift return type must be same as operands!", &B);
1611 llvm_unreachable("Unknown BinaryOperator opcode!");
1614 visitInstruction(B);
1617 void Verifier::visitICmpInst(ICmpInst &IC) {
1618 // Check that the operands are the same type
1619 Type *Op0Ty = IC.getOperand(0)->getType();
1620 Type *Op1Ty = IC.getOperand(1)->getType();
1621 Assert1(Op0Ty == Op1Ty,
1622 "Both operands to ICmp instruction are not of the same type!", &IC);
1623 // Check that the operands are the right type
1624 Assert1(Op0Ty->isIntOrIntVectorTy() || Op0Ty->getScalarType()->isPointerTy(),
1625 "Invalid operand types for ICmp instruction", &IC);
1626 // Check that the predicate is valid.
1627 Assert1(IC.getPredicate() >= CmpInst::FIRST_ICMP_PREDICATE &&
1628 IC.getPredicate() <= CmpInst::LAST_ICMP_PREDICATE,
1629 "Invalid predicate in ICmp instruction!", &IC);
1631 visitInstruction(IC);
1634 void Verifier::visitFCmpInst(FCmpInst &FC) {
1635 // Check that the operands are the same type
1636 Type *Op0Ty = FC.getOperand(0)->getType();
1637 Type *Op1Ty = FC.getOperand(1)->getType();
1638 Assert1(Op0Ty == Op1Ty,
1639 "Both operands to FCmp instruction are not of the same type!", &FC);
1640 // Check that the operands are the right type
1641 Assert1(Op0Ty->isFPOrFPVectorTy(),
1642 "Invalid operand types for FCmp instruction", &FC);
1643 // Check that the predicate is valid.
1644 Assert1(FC.getPredicate() >= CmpInst::FIRST_FCMP_PREDICATE &&
1645 FC.getPredicate() <= CmpInst::LAST_FCMP_PREDICATE,
1646 "Invalid predicate in FCmp instruction!", &FC);
1648 visitInstruction(FC);
1651 void Verifier::visitExtractElementInst(ExtractElementInst &EI) {
1652 Assert1(ExtractElementInst::isValidOperands(EI.getOperand(0),
1654 "Invalid extractelement operands!", &EI);
1655 visitInstruction(EI);
1658 void Verifier::visitInsertElementInst(InsertElementInst &IE) {
1659 Assert1(InsertElementInst::isValidOperands(IE.getOperand(0),
1662 "Invalid insertelement operands!", &IE);
1663 visitInstruction(IE);
1666 void Verifier::visitShuffleVectorInst(ShuffleVectorInst &SV) {
1667 Assert1(ShuffleVectorInst::isValidOperands(SV.getOperand(0), SV.getOperand(1),
1669 "Invalid shufflevector operands!", &SV);
1670 visitInstruction(SV);
1673 void Verifier::visitGetElementPtrInst(GetElementPtrInst &GEP) {
1674 Type *TargetTy = GEP.getPointerOperandType()->getScalarType();
1676 Assert1(isa<PointerType>(TargetTy),
1677 "GEP base pointer is not a vector or a vector of pointers", &GEP);
1678 Assert1(cast<PointerType>(TargetTy)->getElementType()->isSized(),
1679 "GEP into unsized type!", &GEP);
1680 Assert1(GEP.getPointerOperandType()->isVectorTy() ==
1681 GEP.getType()->isVectorTy(), "Vector GEP must return a vector value",
1684 SmallVector<Value*, 16> Idxs(GEP.idx_begin(), GEP.idx_end());
1686 GetElementPtrInst::getIndexedType(GEP.getPointerOperandType(), Idxs);
1687 Assert1(ElTy, "Invalid indices for GEP pointer type!", &GEP);
1689 Assert2(GEP.getType()->getScalarType()->isPointerTy() &&
1690 cast<PointerType>(GEP.getType()->getScalarType())->getElementType()
1691 == ElTy, "GEP is not of right type for indices!", &GEP, ElTy);
1693 if (GEP.getPointerOperandType()->isVectorTy()) {
1694 // Additional checks for vector GEPs.
1695 unsigned GepWidth = GEP.getPointerOperandType()->getVectorNumElements();
1696 Assert1(GepWidth == GEP.getType()->getVectorNumElements(),
1697 "Vector GEP result width doesn't match operand's", &GEP);
1698 for (unsigned i = 0, e = Idxs.size(); i != e; ++i) {
1699 Type *IndexTy = Idxs[i]->getType();
1700 Assert1(IndexTy->isVectorTy(),
1701 "Vector GEP must have vector indices!", &GEP);
1702 unsigned IndexWidth = IndexTy->getVectorNumElements();
1703 Assert1(IndexWidth == GepWidth, "Invalid GEP index vector width", &GEP);
1706 visitInstruction(GEP);
1709 static bool isContiguous(const ConstantRange &A, const ConstantRange &B) {
1710 return A.getUpper() == B.getLower() || A.getLower() == B.getUpper();
1713 void Verifier::visitLoadInst(LoadInst &LI) {
1714 PointerType *PTy = dyn_cast<PointerType>(LI.getOperand(0)->getType());
1715 Assert1(PTy, "Load operand must be a pointer.", &LI);
1716 Type *ElTy = PTy->getElementType();
1717 Assert2(ElTy == LI.getType(),
1718 "Load result type does not match pointer operand type!", &LI, ElTy);
1719 if (LI.isAtomic()) {
1720 Assert1(LI.getOrdering() != Release && LI.getOrdering() != AcquireRelease,
1721 "Load cannot have Release ordering", &LI);
1722 Assert1(LI.getAlignment() != 0,
1723 "Atomic load must specify explicit alignment", &LI);
1724 if (!ElTy->isPointerTy()) {
1725 Assert2(ElTy->isIntegerTy(),
1726 "atomic store operand must have integer type!",
1728 unsigned Size = ElTy->getPrimitiveSizeInBits();
1729 Assert2(Size >= 8 && !(Size & (Size - 1)),
1730 "atomic store operand must be power-of-two byte-sized integer",
1734 Assert1(LI.getSynchScope() == CrossThread,
1735 "Non-atomic load cannot have SynchronizationScope specified", &LI);
1738 if (MDNode *Range = LI.getMetadata(LLVMContext::MD_range)) {
1739 unsigned NumOperands = Range->getNumOperands();
1740 Assert1(NumOperands % 2 == 0, "Unfinished range!", Range);
1741 unsigned NumRanges = NumOperands / 2;
1742 Assert1(NumRanges >= 1, "It should have at least one range!", Range);
1744 ConstantRange LastRange(1); // Dummy initial value
1745 for (unsigned i = 0; i < NumRanges; ++i) {
1746 ConstantInt *Low = dyn_cast<ConstantInt>(Range->getOperand(2*i));
1747 Assert1(Low, "The lower limit must be an integer!", Low);
1748 ConstantInt *High = dyn_cast<ConstantInt>(Range->getOperand(2*i + 1));
1749 Assert1(High, "The upper limit must be an integer!", High);
1750 Assert1(High->getType() == Low->getType() &&
1751 High->getType() == ElTy, "Range types must match load type!",
1754 APInt HighV = High->getValue();
1755 APInt LowV = Low->getValue();
1756 ConstantRange CurRange(LowV, HighV);
1757 Assert1(!CurRange.isEmptySet() && !CurRange.isFullSet(),
1758 "Range must not be empty!", Range);
1760 Assert1(CurRange.intersectWith(LastRange).isEmptySet(),
1761 "Intervals are overlapping", Range);
1762 Assert1(LowV.sgt(LastRange.getLower()), "Intervals are not in order",
1764 Assert1(!isContiguous(CurRange, LastRange), "Intervals are contiguous",
1767 LastRange = ConstantRange(LowV, HighV);
1769 if (NumRanges > 2) {
1771 dyn_cast<ConstantInt>(Range->getOperand(0))->getValue();
1773 dyn_cast<ConstantInt>(Range->getOperand(1))->getValue();
1774 ConstantRange FirstRange(FirstLow, FirstHigh);
1775 Assert1(FirstRange.intersectWith(LastRange).isEmptySet(),
1776 "Intervals are overlapping", Range);
1777 Assert1(!isContiguous(FirstRange, LastRange), "Intervals are contiguous",
1784 visitInstruction(LI);
1787 void Verifier::visitStoreInst(StoreInst &SI) {
1788 PointerType *PTy = dyn_cast<PointerType>(SI.getOperand(1)->getType());
1789 Assert1(PTy, "Store operand must be a pointer.", &SI);
1790 Type *ElTy = PTy->getElementType();
1791 Assert2(ElTy == SI.getOperand(0)->getType(),
1792 "Stored value type does not match pointer operand type!",
1794 if (SI.isAtomic()) {
1795 Assert1(SI.getOrdering() != Acquire && SI.getOrdering() != AcquireRelease,
1796 "Store cannot have Acquire ordering", &SI);
1797 Assert1(SI.getAlignment() != 0,
1798 "Atomic store must specify explicit alignment", &SI);
1799 if (!ElTy->isPointerTy()) {
1800 Assert2(ElTy->isIntegerTy(),
1801 "atomic store operand must have integer type!",
1803 unsigned Size = ElTy->getPrimitiveSizeInBits();
1804 Assert2(Size >= 8 && !(Size & (Size - 1)),
1805 "atomic store operand must be power-of-two byte-sized integer",
1809 Assert1(SI.getSynchScope() == CrossThread,
1810 "Non-atomic store cannot have SynchronizationScope specified", &SI);
1812 visitInstruction(SI);
1815 void Verifier::visitAllocaInst(AllocaInst &AI) {
1816 SmallPtrSet<const Type*, 4> Visited;
1817 PointerType *PTy = AI.getType();
1818 Assert1(PTy->getAddressSpace() == 0,
1819 "Allocation instruction pointer not in the generic address space!",
1821 Assert1(PTy->getElementType()->isSized(&Visited), "Cannot allocate unsized type",
1823 Assert1(AI.getArraySize()->getType()->isIntegerTy(),
1824 "Alloca array size must have integer type", &AI);
1826 visitInstruction(AI);
1829 void Verifier::visitAtomicCmpXchgInst(AtomicCmpXchgInst &CXI) {
1830 Assert1(CXI.getOrdering() != NotAtomic,
1831 "cmpxchg instructions must be atomic.", &CXI);
1832 Assert1(CXI.getOrdering() != Unordered,
1833 "cmpxchg instructions cannot be unordered.", &CXI);
1834 PointerType *PTy = dyn_cast<PointerType>(CXI.getOperand(0)->getType());
1835 Assert1(PTy, "First cmpxchg operand must be a pointer.", &CXI);
1836 Type *ElTy = PTy->getElementType();
1837 Assert2(ElTy->isIntegerTy(),
1838 "cmpxchg operand must have integer type!",
1840 unsigned Size = ElTy->getPrimitiveSizeInBits();
1841 Assert2(Size >= 8 && !(Size & (Size - 1)),
1842 "cmpxchg operand must be power-of-two byte-sized integer",
1844 Assert2(ElTy == CXI.getOperand(1)->getType(),
1845 "Expected value type does not match pointer operand type!",
1847 Assert2(ElTy == CXI.getOperand(2)->getType(),
1848 "Stored value type does not match pointer operand type!",
1850 visitInstruction(CXI);
1853 void Verifier::visitAtomicRMWInst(AtomicRMWInst &RMWI) {
1854 Assert1(RMWI.getOrdering() != NotAtomic,
1855 "atomicrmw instructions must be atomic.", &RMWI);
1856 Assert1(RMWI.getOrdering() != Unordered,
1857 "atomicrmw instructions cannot be unordered.", &RMWI);
1858 PointerType *PTy = dyn_cast<PointerType>(RMWI.getOperand(0)->getType());
1859 Assert1(PTy, "First atomicrmw operand must be a pointer.", &RMWI);
1860 Type *ElTy = PTy->getElementType();
1861 Assert2(ElTy->isIntegerTy(),
1862 "atomicrmw operand must have integer type!",
1864 unsigned Size = ElTy->getPrimitiveSizeInBits();
1865 Assert2(Size >= 8 && !(Size & (Size - 1)),
1866 "atomicrmw operand must be power-of-two byte-sized integer",
1868 Assert2(ElTy == RMWI.getOperand(1)->getType(),
1869 "Argument value type does not match pointer operand type!",
1871 Assert1(AtomicRMWInst::FIRST_BINOP <= RMWI.getOperation() &&
1872 RMWI.getOperation() <= AtomicRMWInst::LAST_BINOP,
1873 "Invalid binary operation!", &RMWI);
1874 visitInstruction(RMWI);
1877 void Verifier::visitFenceInst(FenceInst &FI) {
1878 const AtomicOrdering Ordering = FI.getOrdering();
1879 Assert1(Ordering == Acquire || Ordering == Release ||
1880 Ordering == AcquireRelease || Ordering == SequentiallyConsistent,
1881 "fence instructions may only have "
1882 "acquire, release, acq_rel, or seq_cst ordering.", &FI);
1883 visitInstruction(FI);
1886 void Verifier::visitExtractValueInst(ExtractValueInst &EVI) {
1887 Assert1(ExtractValueInst::getIndexedType(EVI.getAggregateOperand()->getType(),
1888 EVI.getIndices()) ==
1890 "Invalid ExtractValueInst operands!", &EVI);
1892 visitInstruction(EVI);
1895 void Verifier::visitInsertValueInst(InsertValueInst &IVI) {
1896 Assert1(ExtractValueInst::getIndexedType(IVI.getAggregateOperand()->getType(),
1897 IVI.getIndices()) ==
1898 IVI.getOperand(1)->getType(),
1899 "Invalid InsertValueInst operands!", &IVI);
1901 visitInstruction(IVI);
1904 void Verifier::visitLandingPadInst(LandingPadInst &LPI) {
1905 BasicBlock *BB = LPI.getParent();
1907 // The landingpad instruction is ill-formed if it doesn't have any clauses and
1909 Assert1(LPI.getNumClauses() > 0 || LPI.isCleanup(),
1910 "LandingPadInst needs at least one clause or to be a cleanup.", &LPI);
1912 // The landingpad instruction defines its parent as a landing pad block. The
1913 // landing pad block may be branched to only by the unwind edge of an invoke.
1914 for (pred_iterator I = pred_begin(BB), E = pred_end(BB); I != E; ++I) {
1915 const InvokeInst *II = dyn_cast<InvokeInst>((*I)->getTerminator());
1916 Assert1(II && II->getUnwindDest() == BB && II->getNormalDest() != BB,
1917 "Block containing LandingPadInst must be jumped to "
1918 "only by the unwind edge of an invoke.", &LPI);
1921 // The landingpad instruction must be the first non-PHI instruction in the
1923 Assert1(LPI.getParent()->getLandingPadInst() == &LPI,
1924 "LandingPadInst not the first non-PHI instruction in the block.",
1927 // The personality functions for all landingpad instructions within the same
1928 // function should match.
1930 Assert1(LPI.getPersonalityFn() == PersonalityFn,
1931 "Personality function doesn't match others in function", &LPI);
1932 PersonalityFn = LPI.getPersonalityFn();
1934 // All operands must be constants.
1935 Assert1(isa<Constant>(PersonalityFn), "Personality function is not constant!",
1937 for (unsigned i = 0, e = LPI.getNumClauses(); i < e; ++i) {
1938 Value *Clause = LPI.getClause(i);
1939 Assert1(isa<Constant>(Clause), "Clause is not constant!", &LPI);
1940 if (LPI.isCatch(i)) {
1941 Assert1(isa<PointerType>(Clause->getType()),
1942 "Catch operand does not have pointer type!", &LPI);
1944 Assert1(LPI.isFilter(i), "Clause is neither catch nor filter!", &LPI);
1945 Assert1(isa<ConstantArray>(Clause) || isa<ConstantAggregateZero>(Clause),
1946 "Filter operand is not an array of constants!", &LPI);
1950 visitInstruction(LPI);
1953 void Verifier::verifyDominatesUse(Instruction &I, unsigned i) {
1954 Instruction *Op = cast<Instruction>(I.getOperand(i));
1955 // If the we have an invalid invoke, don't try to compute the dominance.
1956 // We already reject it in the invoke specific checks and the dominance
1957 // computation doesn't handle multiple edges.
1958 if (InvokeInst *II = dyn_cast<InvokeInst>(Op)) {
1959 if (II->getNormalDest() == II->getUnwindDest())
1963 const Use &U = I.getOperandUse(i);
1964 Assert2(InstsInThisBlock.count(Op) || DT.dominates(Op, U),
1965 "Instruction does not dominate all uses!", Op, &I);
1968 /// verifyInstruction - Verify that an instruction is well formed.
1970 void Verifier::visitInstruction(Instruction &I) {
1971 BasicBlock *BB = I.getParent();
1972 Assert1(BB, "Instruction not embedded in basic block!", &I);
1974 if (!isa<PHINode>(I)) { // Check that non-phi nodes are not self referential
1975 for (Value::use_iterator UI = I.use_begin(), UE = I.use_end();
1977 Assert1(*UI != (User*)&I || !DT.isReachableFromEntry(BB),
1978 "Only PHI nodes may reference their own value!", &I);
1981 // Check that void typed values don't have names
1982 Assert1(!I.getType()->isVoidTy() || !I.hasName(),
1983 "Instruction has a name, but provides a void value!", &I);
1985 // Check that the return value of the instruction is either void or a legal
1987 Assert1(I.getType()->isVoidTy() ||
1988 I.getType()->isFirstClassType(),
1989 "Instruction returns a non-scalar type!", &I);
1991 // Check that the instruction doesn't produce metadata. Calls are already
1992 // checked against the callee type.
1993 Assert1(!I.getType()->isMetadataTy() ||
1994 isa<CallInst>(I) || isa<InvokeInst>(I),
1995 "Invalid use of metadata!", &I);
1997 // Check that all uses of the instruction, if they are instructions
1998 // themselves, actually have parent basic blocks. If the use is not an
1999 // instruction, it is an error!
2000 for (User::use_iterator UI = I.use_begin(), UE = I.use_end();
2002 if (Instruction *Used = dyn_cast<Instruction>(*UI))
2003 Assert2(Used->getParent() != 0, "Instruction referencing instruction not"
2004 " embedded in a basic block!", &I, Used);
2006 CheckFailed("Use of instruction is not an instruction!", *UI);
2011 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
2012 Assert1(I.getOperand(i) != 0, "Instruction has null operand!", &I);
2014 // Check to make sure that only first-class-values are operands to
2016 if (!I.getOperand(i)->getType()->isFirstClassType()) {
2017 Assert1(0, "Instruction operands must be first-class values!", &I);
2020 if (Function *F = dyn_cast<Function>(I.getOperand(i))) {
2021 // Check to make sure that the "address of" an intrinsic function is never
2023 Assert1(!F->isIntrinsic() || i == (isa<CallInst>(I) ? e-1 : 0),
2024 "Cannot take the address of an intrinsic!", &I);
2025 Assert1(!F->isIntrinsic() || isa<CallInst>(I) ||
2026 F->getIntrinsicID() == Intrinsic::donothing,
2027 "Cannot invoke an intrinsinc other than donothing", &I);
2028 Assert1(F->getParent() == M, "Referencing function in another module!",
2030 } else if (BasicBlock *OpBB = dyn_cast<BasicBlock>(I.getOperand(i))) {
2031 Assert1(OpBB->getParent() == BB->getParent(),
2032 "Referring to a basic block in another function!", &I);
2033 } else if (Argument *OpArg = dyn_cast<Argument>(I.getOperand(i))) {
2034 Assert1(OpArg->getParent() == BB->getParent(),
2035 "Referring to an argument in another function!", &I);
2036 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(I.getOperand(i))) {
2037 Assert1(GV->getParent() == M, "Referencing global in another module!",
2039 } else if (isa<Instruction>(I.getOperand(i))) {
2040 verifyDominatesUse(I, i);
2041 } else if (isa<InlineAsm>(I.getOperand(i))) {
2042 Assert1((i + 1 == e && isa<CallInst>(I)) ||
2043 (i + 3 == e && isa<InvokeInst>(I)),
2044 "Cannot take the address of an inline asm!", &I);
2045 } else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(I.getOperand(i))) {
2046 if (CE->getType()->isPtrOrPtrVectorTy()) {
2047 // If we have a ConstantExpr pointer, we need to see if it came from an
2048 // illegal bitcast (inttoptr <constant int> )
2049 SmallVector<const ConstantExpr *, 4> Stack;
2050 SmallPtrSet<const ConstantExpr *, 4> Visited;
2051 Stack.push_back(CE);
2053 while (!Stack.empty()) {
2054 const ConstantExpr *V = Stack.pop_back_val();
2055 if (!Visited.insert(V))
2058 VerifyConstantExprBitcastType(V);
2060 for (unsigned I = 0, N = V->getNumOperands(); I != N; ++I) {
2061 if (ConstantExpr *Op = dyn_cast<ConstantExpr>(V->getOperand(I)))
2062 Stack.push_back(Op);
2069 if (MDNode *MD = I.getMetadata(LLVMContext::MD_fpmath)) {
2070 Assert1(I.getType()->isFPOrFPVectorTy(),
2071 "fpmath requires a floating point result!", &I);
2072 Assert1(MD->getNumOperands() == 1, "fpmath takes one operand!", &I);
2073 Value *Op0 = MD->getOperand(0);
2074 if (ConstantFP *CFP0 = dyn_cast_or_null<ConstantFP>(Op0)) {
2075 APFloat Accuracy = CFP0->getValueAPF();
2076 Assert1(Accuracy.isFiniteNonZero() && !Accuracy.isNegative(),
2077 "fpmath accuracy not a positive number!", &I);
2079 Assert1(false, "invalid fpmath accuracy!", &I);
2083 MDNode *MD = I.getMetadata(LLVMContext::MD_range);
2084 Assert1(!MD || isa<LoadInst>(I), "Ranges are only for loads!", &I);
2086 if (!DisableDebugInfoVerifier) {
2087 MD = I.getMetadata(LLVMContext::MD_dbg);
2088 Finder.processLocation(*M, DILocation(MD));
2091 InstsInThisBlock.insert(&I);
2094 /// VerifyIntrinsicType - Verify that the specified type (which comes from an
2095 /// intrinsic argument or return value) matches the type constraints specified
2096 /// by the .td file (e.g. an "any integer" argument really is an integer).
2098 /// This return true on error but does not print a message.
2099 bool Verifier::VerifyIntrinsicType(Type *Ty,
2100 ArrayRef<Intrinsic::IITDescriptor> &Infos,
2101 SmallVectorImpl<Type*> &ArgTys) {
2102 using namespace Intrinsic;
2104 // If we ran out of descriptors, there are too many arguments.
2105 if (Infos.empty()) return true;
2106 IITDescriptor D = Infos.front();
2107 Infos = Infos.slice(1);
2110 case IITDescriptor::Void: return !Ty->isVoidTy();
2111 case IITDescriptor::VarArg: return true;
2112 case IITDescriptor::MMX: return !Ty->isX86_MMXTy();
2113 case IITDescriptor::Metadata: return !Ty->isMetadataTy();
2114 case IITDescriptor::Half: return !Ty->isHalfTy();
2115 case IITDescriptor::Float: return !Ty->isFloatTy();
2116 case IITDescriptor::Double: return !Ty->isDoubleTy();
2117 case IITDescriptor::Integer: return !Ty->isIntegerTy(D.Integer_Width);
2118 case IITDescriptor::Vector: {
2119 VectorType *VT = dyn_cast<VectorType>(Ty);
2120 return VT == 0 || VT->getNumElements() != D.Vector_Width ||
2121 VerifyIntrinsicType(VT->getElementType(), Infos, ArgTys);
2123 case IITDescriptor::Pointer: {
2124 PointerType *PT = dyn_cast<PointerType>(Ty);
2125 return PT == 0 || PT->getAddressSpace() != D.Pointer_AddressSpace ||
2126 VerifyIntrinsicType(PT->getElementType(), Infos, ArgTys);
2129 case IITDescriptor::Struct: {
2130 StructType *ST = dyn_cast<StructType>(Ty);
2131 if (ST == 0 || ST->getNumElements() != D.Struct_NumElements)
2134 for (unsigned i = 0, e = D.Struct_NumElements; i != e; ++i)
2135 if (VerifyIntrinsicType(ST->getElementType(i), Infos, ArgTys))
2140 case IITDescriptor::Argument:
2141 // Two cases here - If this is the second occurrence of an argument, verify
2142 // that the later instance matches the previous instance.
2143 if (D.getArgumentNumber() < ArgTys.size())
2144 return Ty != ArgTys[D.getArgumentNumber()];
2146 // Otherwise, if this is the first instance of an argument, record it and
2147 // verify the "Any" kind.
2148 assert(D.getArgumentNumber() == ArgTys.size() && "Table consistency error");
2149 ArgTys.push_back(Ty);
2151 switch (D.getArgumentKind()) {
2152 case IITDescriptor::AK_AnyInteger: return !Ty->isIntOrIntVectorTy();
2153 case IITDescriptor::AK_AnyFloat: return !Ty->isFPOrFPVectorTy();
2154 case IITDescriptor::AK_AnyVector: return !isa<VectorType>(Ty);
2155 case IITDescriptor::AK_AnyPointer: return !isa<PointerType>(Ty);
2157 llvm_unreachable("all argument kinds not covered");
2159 case IITDescriptor::ExtendVecArgument:
2160 // This may only be used when referring to a previous vector argument.
2161 return D.getArgumentNumber() >= ArgTys.size() ||
2162 !isa<VectorType>(ArgTys[D.getArgumentNumber()]) ||
2163 VectorType::getExtendedElementVectorType(
2164 cast<VectorType>(ArgTys[D.getArgumentNumber()])) != Ty;
2166 case IITDescriptor::TruncVecArgument:
2167 // This may only be used when referring to a previous vector argument.
2168 return D.getArgumentNumber() >= ArgTys.size() ||
2169 !isa<VectorType>(ArgTys[D.getArgumentNumber()]) ||
2170 VectorType::getTruncatedElementVectorType(
2171 cast<VectorType>(ArgTys[D.getArgumentNumber()])) != Ty;
2173 llvm_unreachable("unhandled");
2176 /// \brief Verify if the intrinsic has variable arguments.
2177 /// This method is intended to be called after all the fixed arguments have been
2180 /// This method returns true on error and does not print an error message.
2182 Verifier::VerifyIntrinsicIsVarArg(bool isVarArg,
2183 ArrayRef<Intrinsic::IITDescriptor> &Infos) {
2184 using namespace Intrinsic;
2186 // If there are no descriptors left, then it can't be a vararg.
2188 return isVarArg ? true : false;
2190 // There should be only one descriptor remaining at this point.
2191 if (Infos.size() != 1)
2194 // Check and verify the descriptor.
2195 IITDescriptor D = Infos.front();
2196 Infos = Infos.slice(1);
2197 if (D.Kind == IITDescriptor::VarArg)
2198 return isVarArg ? false : true;
2203 /// visitIntrinsicFunction - Allow intrinsics to be verified in different ways.
2205 void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) {
2206 Function *IF = CI.getCalledFunction();
2207 Assert1(IF->isDeclaration(), "Intrinsic functions should never be defined!",
2210 // Verify that the intrinsic prototype lines up with what the .td files
2212 FunctionType *IFTy = IF->getFunctionType();
2213 bool IsVarArg = IFTy->isVarArg();
2215 SmallVector<Intrinsic::IITDescriptor, 8> Table;
2216 getIntrinsicInfoTableEntries(ID, Table);
2217 ArrayRef<Intrinsic::IITDescriptor> TableRef = Table;
2219 SmallVector<Type *, 4> ArgTys;
2220 Assert1(!VerifyIntrinsicType(IFTy->getReturnType(), TableRef, ArgTys),
2221 "Intrinsic has incorrect return type!", IF);
2222 for (unsigned i = 0, e = IFTy->getNumParams(); i != e; ++i)
2223 Assert1(!VerifyIntrinsicType(IFTy->getParamType(i), TableRef, ArgTys),
2224 "Intrinsic has incorrect argument type!", IF);
2226 // Verify if the intrinsic call matches the vararg property.
2228 Assert1(!VerifyIntrinsicIsVarArg(IsVarArg, TableRef),
2229 "Intrinsic was not defined with variable arguments!", IF);
2231 Assert1(!VerifyIntrinsicIsVarArg(IsVarArg, TableRef),
2232 "Callsite was not defined with variable arguments!", IF);
2234 // All descriptors should be absorbed by now.
2235 Assert1(TableRef.empty(), "Intrinsic has too few arguments!", IF);
2237 // Now that we have the intrinsic ID and the actual argument types (and we
2238 // know they are legal for the intrinsic!) get the intrinsic name through the
2239 // usual means. This allows us to verify the mangling of argument types into
2241 Assert1(Intrinsic::getName(ID, ArgTys) == IF->getName(),
2242 "Intrinsic name not mangled correctly for type arguments!", IF);
2244 // If the intrinsic takes MDNode arguments, verify that they are either global
2245 // or are local to *this* function.
2246 for (unsigned i = 0, e = CI.getNumArgOperands(); i != e; ++i)
2247 if (MDNode *MD = dyn_cast<MDNode>(CI.getArgOperand(i)))
2248 visitMDNode(*MD, CI.getParent()->getParent());
2253 case Intrinsic::ctlz: // llvm.ctlz
2254 case Intrinsic::cttz: // llvm.cttz
2255 Assert1(isa<ConstantInt>(CI.getArgOperand(1)),
2256 "is_zero_undef argument of bit counting intrinsics must be a "
2257 "constant int", &CI);
2259 case Intrinsic::dbg_declare: { // llvm.dbg.declare
2260 Assert1(CI.getArgOperand(0) && isa<MDNode>(CI.getArgOperand(0)),
2261 "invalid llvm.dbg.declare intrinsic call 1", &CI);
2262 MDNode *MD = cast<MDNode>(CI.getArgOperand(0));
2263 Assert1(MD->getNumOperands() == 1,
2264 "invalid llvm.dbg.declare intrinsic call 2", &CI);
2265 if (!DisableDebugInfoVerifier)
2266 Finder.processDeclare(*M, cast<DbgDeclareInst>(&CI));
2268 case Intrinsic::dbg_value: { //llvm.dbg.value
2269 if (!DisableDebugInfoVerifier) {
2270 Assert1(CI.getArgOperand(0) && isa<MDNode>(CI.getArgOperand(0)),
2271 "invalid llvm.dbg.value intrinsic call 1", &CI);
2272 Finder.processValue(*M, cast<DbgValueInst>(&CI));
2276 case Intrinsic::memcpy:
2277 case Intrinsic::memmove:
2278 case Intrinsic::memset:
2279 Assert1(isa<ConstantInt>(CI.getArgOperand(3)),
2280 "alignment argument of memory intrinsics must be a constant int",
2282 Assert1(isa<ConstantInt>(CI.getArgOperand(4)),
2283 "isvolatile argument of memory intrinsics must be a constant int",
2286 case Intrinsic::gcroot:
2287 case Intrinsic::gcwrite:
2288 case Intrinsic::gcread:
2289 if (ID == Intrinsic::gcroot) {
2291 dyn_cast<AllocaInst>(CI.getArgOperand(0)->stripPointerCasts());
2292 Assert1(AI, "llvm.gcroot parameter #1 must be an alloca.", &CI);
2293 Assert1(isa<Constant>(CI.getArgOperand(1)),
2294 "llvm.gcroot parameter #2 must be a constant.", &CI);
2295 if (!AI->getType()->getElementType()->isPointerTy()) {
2296 Assert1(!isa<ConstantPointerNull>(CI.getArgOperand(1)),
2297 "llvm.gcroot parameter #1 must either be a pointer alloca, "
2298 "or argument #2 must be a non-null constant.", &CI);
2302 Assert1(CI.getParent()->getParent()->hasGC(),
2303 "Enclosing function does not use GC.", &CI);
2305 case Intrinsic::init_trampoline:
2306 Assert1(isa<Function>(CI.getArgOperand(1)->stripPointerCasts()),
2307 "llvm.init_trampoline parameter #2 must resolve to a function.",
2310 case Intrinsic::prefetch:
2311 Assert1(isa<ConstantInt>(CI.getArgOperand(1)) &&
2312 isa<ConstantInt>(CI.getArgOperand(2)) &&
2313 cast<ConstantInt>(CI.getArgOperand(1))->getZExtValue() < 2 &&
2314 cast<ConstantInt>(CI.getArgOperand(2))->getZExtValue() < 4,
2315 "invalid arguments to llvm.prefetch",
2318 case Intrinsic::stackprotector:
2319 Assert1(isa<AllocaInst>(CI.getArgOperand(1)->stripPointerCasts()),
2320 "llvm.stackprotector parameter #2 must resolve to an alloca.",
2323 case Intrinsic::lifetime_start:
2324 case Intrinsic::lifetime_end:
2325 case Intrinsic::invariant_start:
2326 Assert1(isa<ConstantInt>(CI.getArgOperand(0)),
2327 "size argument of memory use markers must be a constant integer",
2330 case Intrinsic::invariant_end:
2331 Assert1(isa<ConstantInt>(CI.getArgOperand(1)),
2332 "llvm.invariant.end parameter #2 must be a constant integer", &CI);
2337 void Verifier::verifyDebugInfo() {
2338 // Verify Debug Info.
2339 if (!DisableDebugInfoVerifier) {
2340 for (DebugInfoFinder::iterator I = Finder.compile_unit_begin(),
2341 E = Finder.compile_unit_end(); I != E; ++I)
2342 Assert1(DICompileUnit(*I).Verify(), "DICompileUnit does not Verify!", *I);
2343 for (DebugInfoFinder::iterator I = Finder.subprogram_begin(),
2344 E = Finder.subprogram_end(); I != E; ++I)
2345 Assert1(DISubprogram(*I).Verify(), "DISubprogram does not Verify!", *I);
2346 for (DebugInfoFinder::iterator I = Finder.global_variable_begin(),
2347 E = Finder.global_variable_end(); I != E; ++I)
2348 Assert1(DIGlobalVariable(*I).Verify(),
2349 "DIGlobalVariable does not Verify!", *I);
2350 for (DebugInfoFinder::iterator I = Finder.type_begin(),
2351 E = Finder.type_end(); I != E; ++I)
2352 Assert1(DIType(*I).Verify(), "DIType does not Verify!", *I);
2353 for (DebugInfoFinder::iterator I = Finder.scope_begin(),
2354 E = Finder.scope_end(); I != E; ++I)
2355 Assert1(DIScope(*I).Verify(), "DIScope does not Verify!", *I);
2359 //===----------------------------------------------------------------------===//
2360 // Implement the public interfaces to this file...
2361 //===----------------------------------------------------------------------===//
2363 bool llvm::verifyFunction(const Function &f, raw_ostream *OS) {
2364 Function &F = const_cast<Function &>(f);
2365 assert(!F.isDeclaration() && "Cannot verify external functions");
2367 raw_null_ostream NullStr;
2368 Verifier V(OS ? *OS : NullStr);
2370 // Note that this function's return value is inverted from what you would
2371 // expect of a function called "verify".
2372 return !V.verify(F);
2375 bool llvm::verifyModule(const Module &M, raw_ostream *OS) {
2376 raw_null_ostream NullStr;
2377 Verifier V(OS ? *OS : NullStr);
2379 bool Broken = false;
2380 for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I)
2381 if (!I->isDeclaration())
2382 Broken |= !V.verify(*I);
2384 // Note that this function's return value is inverted from what you would
2385 // expect of a function called "verify".
2386 return !V.verify(M) || Broken;
2390 struct VerifierLegacyPass : public FunctionPass {
2396 VerifierLegacyPass() : FunctionPass(ID), FatalErrors(true) {
2397 initializeVerifierLegacyPassPass(*PassRegistry::getPassRegistry());
2399 explicit VerifierLegacyPass(bool FatalErrors)
2400 : FunctionPass(ID), V(dbgs()), FatalErrors(FatalErrors) {
2401 initializeVerifierLegacyPassPass(*PassRegistry::getPassRegistry());
2404 bool runOnFunction(Function &F) {
2405 if (!V.verify(F) && FatalErrors)
2406 report_fatal_error("Broken function found, compilation aborted!");
2411 bool doFinalization(Module &M) {
2412 if (!V.verify(M) && FatalErrors)
2413 report_fatal_error("Broken module found, compilation aborted!");
2418 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
2419 AU.setPreservesAll();
2424 char VerifierLegacyPass::ID = 0;
2425 INITIALIZE_PASS(VerifierLegacyPass, "verify", "Module Verifier", false, false)
2427 FunctionPass *llvm::createVerifierPass(bool FatalErrors) {
2428 return new VerifierLegacyPass(FatalErrors);
2431 PreservedAnalyses VerifierPass::run(Module *M) {
2432 if (verifyModule(*M, &dbgs()) && FatalErrors)
2433 report_fatal_error("Broken module found, compilation aborted!");
2435 return PreservedAnalyses::all();
2438 PreservedAnalyses VerifierPass::run(Function *F) {
2439 if (verifyFunction(*F, &dbgs()) && FatalErrors)
2440 report_fatal_error("Broken function found, compilation aborted!");
2442 return PreservedAnalyses::all();