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/Analysis/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/Analysis/Dominators.h"
55 #include "llvm/Assembly/Writer.h"
56 #include "llvm/DebugInfo.h"
57 #include "llvm/IR/CallingConv.h"
58 #include "llvm/IR/Constants.h"
59 #include "llvm/IR/DataLayout.h"
60 #include "llvm/IR/DerivedTypes.h"
61 #include "llvm/IR/InlineAsm.h"
62 #include "llvm/IR/IntrinsicInst.h"
63 #include "llvm/IR/LLVMContext.h"
64 #include "llvm/IR/Metadata.h"
65 #include "llvm/IR/Module.h"
66 #include "llvm/InstVisitor.h"
67 #include "llvm/Pass.h"
68 #include "llvm/PassManager.h"
69 #include "llvm/Support/CFG.h"
70 #include "llvm/Support/CallSite.h"
71 #include "llvm/Support/CommandLine.h"
72 #include "llvm/Support/ConstantRange.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> DisableDebugInfoVerifier("disable-debug-info-verifier",
83 namespace { // Anonymous namespace for class
84 struct PreVerifier : public FunctionPass {
85 static char ID; // Pass ID, replacement for typeid
87 PreVerifier() : FunctionPass(ID) {
88 initializePreVerifierPass(*PassRegistry::getPassRegistry());
91 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
95 // Check that the prerequisites for successful DominatorTree construction
97 bool runOnFunction(Function &F) {
100 for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I) {
101 if (I->empty() || !I->back().isTerminator()) {
102 dbgs() << "Basic Block in function '" << F.getName()
103 << "' does not have terminator!\n";
104 WriteAsOperand(dbgs(), I, true);
111 report_fatal_error("Broken module, no Basic Block terminator!");
118 char PreVerifier::ID = 0;
119 INITIALIZE_PASS(PreVerifier, "preverify", "Preliminary module verification",
121 static char &PreVerifyID = PreVerifier::ID;
124 struct Verifier : public FunctionPass, public InstVisitor<Verifier> {
125 static char ID; // Pass ID, replacement for typeid
126 bool Broken; // Is this module found to be broken?
127 VerifierFailureAction action;
128 // What to do if verification fails.
129 Module *Mod; // Module we are verifying right now
130 LLVMContext *Context; // Context within which we are verifying
131 DominatorTree *DT; // Dominator Tree, caution can be null!
132 const DataLayout *DL;
134 std::string Messages;
135 raw_string_ostream MessagesStr;
137 /// InstInThisBlock - when verifying a basic block, keep track of all of the
138 /// instructions we have seen so far. This allows us to do efficient
139 /// dominance checks for the case when an instruction has an operand that is
140 /// an instruction in the same block.
141 SmallPtrSet<Instruction*, 16> InstsInThisBlock;
143 /// MDNodes - keep track of the metadata nodes that have been checked
145 SmallPtrSet<MDNode *, 32> MDNodes;
147 /// PersonalityFn - The personality function referenced by the
148 /// LandingPadInsts. All LandingPadInsts within the same function must use
149 /// the same personality function.
150 const Value *PersonalityFn;
152 /// Finder keeps track of all debug info MDNodes in a Module.
153 DebugInfoFinder Finder;
156 : FunctionPass(ID), Broken(false),
157 action(AbortProcessAction), Mod(0), Context(0), DT(0), DL(0),
158 MessagesStr(Messages), PersonalityFn(0) {
159 initializeVerifierPass(*PassRegistry::getPassRegistry());
161 explicit Verifier(VerifierFailureAction ctn)
162 : FunctionPass(ID), Broken(false), action(ctn), Mod(0),
163 Context(0), DT(0), DL(0), MessagesStr(Messages), PersonalityFn(0) {
164 initializeVerifierPass(*PassRegistry::getPassRegistry());
167 bool doInitialization(Module &M) {
169 Context = &M.getContext();
171 DL = getAnalysisIfAvailable<DataLayout>();
173 // We must abort before returning back to the pass manager, or else the
174 // pass manager may try to run other passes on the broken module.
175 return abortIfBroken();
178 bool runOnFunction(Function &F) {
179 // Get dominator information if we are being run by PassManager
180 DT = &getAnalysis<DominatorTree>();
183 if (!Context) Context = &F.getContext();
187 InstsInThisBlock.clear();
190 if (!DisableDebugInfoVerifier)
191 // Verify Debug Info.
194 // We must abort before returning back to the pass manager, or else the
195 // pass manager may try to run other passes on the broken module.
196 return abortIfBroken();
199 bool doFinalization(Module &M) {
200 // Scan through, checking all of the external function's linkage now...
201 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
202 visitGlobalValue(*I);
204 // Check to make sure function prototypes are okay.
205 if (I->isDeclaration()) visitFunction(*I);
208 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
210 visitGlobalVariable(*I);
212 for (Module::alias_iterator I = M.alias_begin(), E = M.alias_end();
214 visitGlobalAlias(*I);
216 for (Module::named_metadata_iterator I = M.named_metadata_begin(),
217 E = M.named_metadata_end(); I != E; ++I)
218 visitNamedMDNode(*I);
221 visitModuleIdents(M);
223 if (!DisableDebugInfoVerifier) {
225 Finder.processModule(M);
226 // Verify Debug Info.
230 // If the module is broken, abort at this time.
231 return abortIfBroken();
234 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
235 AU.setPreservesAll();
236 AU.addRequiredID(PreVerifyID);
237 AU.addRequired<DominatorTree>();
240 /// abortIfBroken - If the module is broken and we are supposed to abort on
241 /// this condition, do so.
243 bool abortIfBroken() {
244 if (!Broken) return false;
245 MessagesStr << "Broken module found, ";
247 case AbortProcessAction:
248 MessagesStr << "compilation aborted!\n";
249 dbgs() << MessagesStr.str();
250 // Client should choose different reaction if abort is not desired
252 case PrintMessageAction:
253 MessagesStr << "verification continues.\n";
254 dbgs() << MessagesStr.str();
256 case ReturnStatusAction:
257 MessagesStr << "compilation terminated.\n";
260 llvm_unreachable("Invalid action");
264 // Verification methods...
265 void visitGlobalValue(GlobalValue &GV);
266 void visitGlobalVariable(GlobalVariable &GV);
267 void visitGlobalAlias(GlobalAlias &GA);
268 void visitNamedMDNode(NamedMDNode &NMD);
269 void visitMDNode(MDNode &MD, Function *F);
270 void visitModuleIdents(Module &M);
271 void visitModuleFlags(Module &M);
272 void visitModuleFlag(MDNode *Op, DenseMap<MDString*, MDNode*> &SeenIDs,
273 SmallVectorImpl<MDNode*> &Requirements);
274 void visitFunction(Function &F);
275 void visitBasicBlock(BasicBlock &BB);
276 using InstVisitor<Verifier>::visit;
278 void visit(Instruction &I);
280 void visitTruncInst(TruncInst &I);
281 void visitZExtInst(ZExtInst &I);
282 void visitSExtInst(SExtInst &I);
283 void visitFPTruncInst(FPTruncInst &I);
284 void visitFPExtInst(FPExtInst &I);
285 void visitFPToUIInst(FPToUIInst &I);
286 void visitFPToSIInst(FPToSIInst &I);
287 void visitUIToFPInst(UIToFPInst &I);
288 void visitSIToFPInst(SIToFPInst &I);
289 void visitIntToPtrInst(IntToPtrInst &I);
290 void visitPtrToIntInst(PtrToIntInst &I);
291 void visitBitCastInst(BitCastInst &I);
292 void visitAddrSpaceCastInst(AddrSpaceCastInst &I);
293 void visitPHINode(PHINode &PN);
294 void visitBinaryOperator(BinaryOperator &B);
295 void visitICmpInst(ICmpInst &IC);
296 void visitFCmpInst(FCmpInst &FC);
297 void visitExtractElementInst(ExtractElementInst &EI);
298 void visitInsertElementInst(InsertElementInst &EI);
299 void visitShuffleVectorInst(ShuffleVectorInst &EI);
300 void visitVAArgInst(VAArgInst &VAA) { visitInstruction(VAA); }
301 void visitCallInst(CallInst &CI);
302 void visitInvokeInst(InvokeInst &II);
303 void visitGetElementPtrInst(GetElementPtrInst &GEP);
304 void visitLoadInst(LoadInst &LI);
305 void visitStoreInst(StoreInst &SI);
306 void verifyDominatesUse(Instruction &I, unsigned i);
307 void visitInstruction(Instruction &I);
308 void visitTerminatorInst(TerminatorInst &I);
309 void visitBranchInst(BranchInst &BI);
310 void visitReturnInst(ReturnInst &RI);
311 void visitSwitchInst(SwitchInst &SI);
312 void visitIndirectBrInst(IndirectBrInst &BI);
313 void visitSelectInst(SelectInst &SI);
314 void visitUserOp1(Instruction &I);
315 void visitUserOp2(Instruction &I) { visitUserOp1(I); }
316 void visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI);
317 void visitAtomicCmpXchgInst(AtomicCmpXchgInst &CXI);
318 void visitAtomicRMWInst(AtomicRMWInst &RMWI);
319 void visitFenceInst(FenceInst &FI);
320 void visitAllocaInst(AllocaInst &AI);
321 void visitExtractValueInst(ExtractValueInst &EVI);
322 void visitInsertValueInst(InsertValueInst &IVI);
323 void visitLandingPadInst(LandingPadInst &LPI);
325 void VerifyCallSite(CallSite CS);
326 bool PerformTypeCheck(Intrinsic::ID ID, Function *F, Type *Ty,
327 int VT, unsigned ArgNo, std::string &Suffix);
328 bool VerifyIntrinsicType(Type *Ty,
329 ArrayRef<Intrinsic::IITDescriptor> &Infos,
330 SmallVectorImpl<Type*> &ArgTys);
331 bool VerifyIntrinsicIsVarArg(bool isVarArg,
332 ArrayRef<Intrinsic::IITDescriptor> &Infos);
333 bool VerifyAttributeCount(AttributeSet Attrs, unsigned Params);
334 void VerifyAttributeTypes(AttributeSet Attrs, unsigned Idx,
335 bool isFunction, const Value *V);
336 void VerifyParameterAttrs(AttributeSet Attrs, unsigned Idx, Type *Ty,
337 bool isReturnValue, const Value *V);
338 void VerifyFunctionAttrs(FunctionType *FT, AttributeSet Attrs,
341 void VerifyBitcastType(const Value *V, Type *DestTy, Type *SrcTy);
342 void VerifyConstantExprBitcastType(const ConstantExpr *CE);
344 void verifyDebugInfo();
346 void WriteValue(const Value *V) {
348 if (isa<Instruction>(V)) {
349 MessagesStr << *V << '\n';
351 WriteAsOperand(MessagesStr, V, true, Mod);
356 void WriteType(Type *T) {
358 MessagesStr << ' ' << *T;
362 // CheckFailed - A check failed, so print out the condition and the message
363 // that failed. This provides a nice place to put a breakpoint if you want
364 // to see why something is not correct.
365 void CheckFailed(const Twine &Message,
366 const Value *V1 = 0, const Value *V2 = 0,
367 const Value *V3 = 0, const Value *V4 = 0) {
368 MessagesStr << Message.str() << "\n";
376 void CheckFailed(const Twine &Message, const Value *V1,
377 Type *T2, const Value *V3 = 0) {
378 MessagesStr << Message.str() << "\n";
385 void CheckFailed(const Twine &Message, Type *T1,
386 Type *T2 = 0, Type *T3 = 0) {
387 MessagesStr << Message.str() << "\n";
394 } // End anonymous namespace
396 char Verifier::ID = 0;
397 INITIALIZE_PASS_BEGIN(Verifier, "verify", "Module Verifier", false, false)
398 INITIALIZE_PASS_DEPENDENCY(PreVerifier)
399 INITIALIZE_PASS_DEPENDENCY(DominatorTree)
400 INITIALIZE_PASS_END(Verifier, "verify", "Module Verifier", false, false)
402 // Assert - We know that cond should be true, if not print an error message.
403 #define Assert(C, M) \
404 do { if (!(C)) { CheckFailed(M); return; } } while (0)
405 #define Assert1(C, M, V1) \
406 do { if (!(C)) { CheckFailed(M, V1); return; } } while (0)
407 #define Assert2(C, M, V1, V2) \
408 do { if (!(C)) { CheckFailed(M, V1, V2); return; } } while (0)
409 #define Assert3(C, M, V1, V2, V3) \
410 do { if (!(C)) { CheckFailed(M, V1, V2, V3); return; } } while (0)
411 #define Assert4(C, M, V1, V2, V3, V4) \
412 do { if (!(C)) { CheckFailed(M, V1, V2, V3, V4); return; } } while (0)
414 void Verifier::visit(Instruction &I) {
415 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
416 Assert1(I.getOperand(i) != 0, "Operand is null", &I);
417 InstVisitor<Verifier>::visit(I);
421 void Verifier::visitGlobalValue(GlobalValue &GV) {
422 Assert1(!GV.isDeclaration() ||
423 GV.isMaterializable() ||
424 GV.hasExternalLinkage() ||
425 GV.hasDLLImportLinkage() ||
426 GV.hasExternalWeakLinkage() ||
427 (isa<GlobalAlias>(GV) &&
428 (GV.hasLocalLinkage() || GV.hasWeakLinkage())),
429 "Global is external, but doesn't have external or dllimport or weak linkage!",
432 Assert1(!GV.hasDLLImportLinkage() || GV.isDeclaration(),
433 "Global is marked as dllimport, but not external", &GV);
435 Assert1(!GV.hasAppendingLinkage() || isa<GlobalVariable>(GV),
436 "Only global variables can have appending linkage!", &GV);
438 if (GV.hasAppendingLinkage()) {
439 GlobalVariable *GVar = dyn_cast<GlobalVariable>(&GV);
440 Assert1(GVar && GVar->getType()->getElementType()->isArrayTy(),
441 "Only global arrays can have appending linkage!", GVar);
445 void Verifier::visitGlobalVariable(GlobalVariable &GV) {
446 if (GV.hasInitializer()) {
447 Assert1(GV.getInitializer()->getType() == GV.getType()->getElementType(),
448 "Global variable initializer type does not match global "
449 "variable type!", &GV);
451 // If the global has common linkage, it must have a zero initializer and
452 // cannot be constant.
453 if (GV.hasCommonLinkage()) {
454 Assert1(GV.getInitializer()->isNullValue(),
455 "'common' global must have a zero initializer!", &GV);
456 Assert1(!GV.isConstant(), "'common' global may not be marked constant!",
460 Assert1(GV.hasExternalLinkage() || GV.hasDLLImportLinkage() ||
461 GV.hasExternalWeakLinkage(),
462 "invalid linkage type for global declaration", &GV);
465 if (GV.hasName() && (GV.getName() == "llvm.global_ctors" ||
466 GV.getName() == "llvm.global_dtors")) {
467 Assert1(!GV.hasInitializer() || GV.hasAppendingLinkage(),
468 "invalid linkage for intrinsic global variable", &GV);
469 // Don't worry about emitting an error for it not being an array,
470 // visitGlobalValue will complain on appending non-array.
471 if (ArrayType *ATy = dyn_cast<ArrayType>(GV.getType())) {
472 StructType *STy = dyn_cast<StructType>(ATy->getElementType());
473 PointerType *FuncPtrTy =
474 FunctionType::get(Type::getVoidTy(*Context), false)->getPointerTo();
475 Assert1(STy && STy->getNumElements() == 2 &&
476 STy->getTypeAtIndex(0u)->isIntegerTy(32) &&
477 STy->getTypeAtIndex(1) == FuncPtrTy,
478 "wrong type for intrinsic global variable", &GV);
482 if (GV.hasName() && (GV.getName() == "llvm.used" ||
483 GV.getName() == "llvm.compiler.used")) {
484 Assert1(!GV.hasInitializer() || GV.hasAppendingLinkage(),
485 "invalid linkage for intrinsic global variable", &GV);
486 Type *GVType = GV.getType()->getElementType();
487 if (ArrayType *ATy = dyn_cast<ArrayType>(GVType)) {
488 PointerType *PTy = dyn_cast<PointerType>(ATy->getElementType());
489 Assert1(PTy, "wrong type for intrinsic global variable", &GV);
490 if (GV.hasInitializer()) {
491 Constant *Init = GV.getInitializer();
492 ConstantArray *InitArray = dyn_cast<ConstantArray>(Init);
493 Assert1(InitArray, "wrong initalizer for intrinsic global variable",
495 for (unsigned i = 0, e = InitArray->getNumOperands(); i != e; ++i) {
496 Value *V = Init->getOperand(i)->stripPointerCastsNoFollowAliases();
498 isa<GlobalVariable>(V) || isa<Function>(V) || isa<GlobalAlias>(V),
499 "invalid llvm.used member", V);
500 Assert1(V->hasName(), "members of llvm.used must be named", V);
506 if (!GV.hasInitializer()) {
507 visitGlobalValue(GV);
511 // Walk any aggregate initializers looking for bitcasts between address spaces
512 SmallPtrSet<const Value *, 4> Visited;
513 SmallVector<const Value *, 4> WorkStack;
514 WorkStack.push_back(cast<Value>(GV.getInitializer()));
516 while (!WorkStack.empty()) {
517 const Value *V = WorkStack.pop_back_val();
518 if (!Visited.insert(V))
521 if (const User *U = dyn_cast<User>(V)) {
522 for (unsigned I = 0, N = U->getNumOperands(); I != N; ++I)
523 WorkStack.push_back(U->getOperand(I));
526 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
527 VerifyConstantExprBitcastType(CE);
533 visitGlobalValue(GV);
536 void Verifier::visitGlobalAlias(GlobalAlias &GA) {
537 Assert1(!GA.getName().empty(),
538 "Alias name cannot be empty!", &GA);
539 Assert1(GlobalAlias::isValidLinkage(GA.getLinkage()),
540 "Alias should have external or external weak linkage!", &GA);
541 Assert1(GA.getAliasee(),
542 "Aliasee cannot be NULL!", &GA);
543 Assert1(GA.getType() == GA.getAliasee()->getType(),
544 "Alias and aliasee types should match!", &GA);
545 Assert1(!GA.hasUnnamedAddr(), "Alias cannot have unnamed_addr!", &GA);
547 Constant *Aliasee = GA.getAliasee();
549 if (!isa<GlobalValue>(Aliasee)) {
550 ConstantExpr *CE = dyn_cast<ConstantExpr>(Aliasee);
552 (CE->getOpcode() == Instruction::BitCast ||
553 CE->getOpcode() == Instruction::GetElementPtr) &&
554 isa<GlobalValue>(CE->getOperand(0)),
555 "Aliasee should be either GlobalValue or bitcast of GlobalValue",
558 if (CE->getOpcode() == Instruction::BitCast) {
559 unsigned SrcAS = CE->getOperand(0)->getType()->getPointerAddressSpace();
560 unsigned DstAS = CE->getType()->getPointerAddressSpace();
562 Assert1(SrcAS == DstAS,
563 "Alias bitcasts cannot be between different address spaces",
568 const GlobalValue* Resolved = GA.resolveAliasedGlobal(/*stopOnWeak*/ false);
570 "Aliasing chain should end with function or global variable", &GA);
572 visitGlobalValue(GA);
575 void Verifier::visitNamedMDNode(NamedMDNode &NMD) {
576 for (unsigned i = 0, e = NMD.getNumOperands(); i != e; ++i) {
577 MDNode *MD = NMD.getOperand(i);
581 Assert1(!MD->isFunctionLocal(),
582 "Named metadata operand cannot be function local!", MD);
587 void Verifier::visitMDNode(MDNode &MD, Function *F) {
588 // Only visit each node once. Metadata can be mutually recursive, so this
589 // avoids infinite recursion here, as well as being an optimization.
590 if (!MDNodes.insert(&MD))
593 for (unsigned i = 0, e = MD.getNumOperands(); i != e; ++i) {
594 Value *Op = MD.getOperand(i);
597 if (isa<Constant>(Op) || isa<MDString>(Op))
599 if (MDNode *N = dyn_cast<MDNode>(Op)) {
600 Assert2(MD.isFunctionLocal() || !N->isFunctionLocal(),
601 "Global metadata operand cannot be function local!", &MD, N);
605 Assert2(MD.isFunctionLocal(), "Invalid operand for global metadata!", &MD, Op);
607 // If this was an instruction, bb, or argument, verify that it is in the
608 // function that we expect.
609 Function *ActualF = 0;
610 if (Instruction *I = dyn_cast<Instruction>(Op))
611 ActualF = I->getParent()->getParent();
612 else if (BasicBlock *BB = dyn_cast<BasicBlock>(Op))
613 ActualF = BB->getParent();
614 else if (Argument *A = dyn_cast<Argument>(Op))
615 ActualF = A->getParent();
616 assert(ActualF && "Unimplemented function local metadata case!");
618 Assert2(ActualF == F, "function-local metadata used in wrong function",
623 void Verifier::visitModuleIdents(Module &M) {
624 const NamedMDNode *Idents = M.getNamedMetadata("llvm.ident");
628 // llvm.ident takes a list of metadata entry. Each entry has only one string.
629 // Scan each llvm.ident entry and make sure that this requirement is met.
630 for (unsigned i = 0, e = Idents->getNumOperands(); i != e; ++i) {
631 const MDNode *N = Idents->getOperand(i);
632 Assert1(N->getNumOperands() == 1,
633 "incorrect number of operands in llvm.ident metadata", N);
634 Assert1(isa<MDString>(N->getOperand(0)),
635 ("invalid value for llvm.ident metadata entry operand"
636 "(the operand should be a string)"),
641 void Verifier::visitModuleFlags(Module &M) {
642 const NamedMDNode *Flags = M.getModuleFlagsMetadata();
645 // Scan each flag, and track the flags and requirements.
646 DenseMap<MDString*, MDNode*> SeenIDs;
647 SmallVector<MDNode*, 16> Requirements;
648 for (unsigned I = 0, E = Flags->getNumOperands(); I != E; ++I) {
649 visitModuleFlag(Flags->getOperand(I), SeenIDs, Requirements);
652 // Validate that the requirements in the module are valid.
653 for (unsigned I = 0, E = Requirements.size(); I != E; ++I) {
654 MDNode *Requirement = Requirements[I];
655 MDString *Flag = cast<MDString>(Requirement->getOperand(0));
656 Value *ReqValue = Requirement->getOperand(1);
658 MDNode *Op = SeenIDs.lookup(Flag);
660 CheckFailed("invalid requirement on flag, flag is not present in module",
665 if (Op->getOperand(2) != ReqValue) {
666 CheckFailed(("invalid requirement on flag, "
667 "flag does not have the required value"),
674 void Verifier::visitModuleFlag(MDNode *Op, DenseMap<MDString*, MDNode*>&SeenIDs,
675 SmallVectorImpl<MDNode*> &Requirements) {
676 // Each module flag should have three arguments, the merge behavior (a
677 // constant int), the flag ID (an MDString), and the value.
678 Assert1(Op->getNumOperands() == 3,
679 "incorrect number of operands in module flag", Op);
680 ConstantInt *Behavior = dyn_cast<ConstantInt>(Op->getOperand(0));
681 MDString *ID = dyn_cast<MDString>(Op->getOperand(1));
683 "invalid behavior operand in module flag (expected constant integer)",
685 unsigned BehaviorValue = Behavior->getZExtValue();
687 "invalid ID operand in module flag (expected metadata string)",
690 // Sanity check the values for behaviors with additional requirements.
691 switch (BehaviorValue) {
694 "invalid behavior operand in module flag (unexpected constant)",
699 case Module::Warning:
700 case Module::Override:
701 // These behavior types accept any value.
704 case Module::Require: {
705 // The value should itself be an MDNode with two operands, a flag ID (an
706 // MDString), and a value.
707 MDNode *Value = dyn_cast<MDNode>(Op->getOperand(2));
708 Assert1(Value && Value->getNumOperands() == 2,
709 "invalid value for 'require' module flag (expected metadata pair)",
711 Assert1(isa<MDString>(Value->getOperand(0)),
712 ("invalid value for 'require' module flag "
713 "(first value operand should be a string)"),
714 Value->getOperand(0));
716 // Append it to the list of requirements, to check once all module flags are
718 Requirements.push_back(Value);
723 case Module::AppendUnique: {
724 // These behavior types require the operand be an MDNode.
725 Assert1(isa<MDNode>(Op->getOperand(2)),
726 "invalid value for 'append'-type module flag "
727 "(expected a metadata node)", Op->getOperand(2));
732 // Unless this is a "requires" flag, check the ID is unique.
733 if (BehaviorValue != Module::Require) {
734 bool Inserted = SeenIDs.insert(std::make_pair(ID, Op)).second;
736 "module flag identifiers must be unique (or of 'require' type)",
741 void Verifier::VerifyAttributeTypes(AttributeSet Attrs, unsigned Idx,
742 bool isFunction, const Value *V) {
744 for (unsigned I = 0, E = Attrs.getNumSlots(); I != E; ++I)
745 if (Attrs.getSlotIndex(I) == Idx) {
750 assert(Slot != ~0U && "Attribute set inconsistency!");
752 for (AttributeSet::iterator I = Attrs.begin(Slot), E = Attrs.end(Slot);
754 if (I->isStringAttribute())
757 if (I->getKindAsEnum() == Attribute::NoReturn ||
758 I->getKindAsEnum() == Attribute::NoUnwind ||
759 I->getKindAsEnum() == Attribute::NoInline ||
760 I->getKindAsEnum() == Attribute::AlwaysInline ||
761 I->getKindAsEnum() == Attribute::OptimizeForSize ||
762 I->getKindAsEnum() == Attribute::StackProtect ||
763 I->getKindAsEnum() == Attribute::StackProtectReq ||
764 I->getKindAsEnum() == Attribute::StackProtectStrong ||
765 I->getKindAsEnum() == Attribute::NoRedZone ||
766 I->getKindAsEnum() == Attribute::NoImplicitFloat ||
767 I->getKindAsEnum() == Attribute::Naked ||
768 I->getKindAsEnum() == Attribute::InlineHint ||
769 I->getKindAsEnum() == Attribute::StackAlignment ||
770 I->getKindAsEnum() == Attribute::UWTable ||
771 I->getKindAsEnum() == Attribute::NonLazyBind ||
772 I->getKindAsEnum() == Attribute::ReturnsTwice ||
773 I->getKindAsEnum() == Attribute::SanitizeAddress ||
774 I->getKindAsEnum() == Attribute::SanitizeThread ||
775 I->getKindAsEnum() == Attribute::SanitizeMemory ||
776 I->getKindAsEnum() == Attribute::MinSize ||
777 I->getKindAsEnum() == Attribute::NoDuplicate ||
778 I->getKindAsEnum() == Attribute::Builtin ||
779 I->getKindAsEnum() == Attribute::NoBuiltin ||
780 I->getKindAsEnum() == Attribute::Cold ||
781 I->getKindAsEnum() == Attribute::OptimizeNone) {
783 CheckFailed("Attribute '" + I->getAsString() +
784 "' only applies to functions!", V);
787 } else if (I->getKindAsEnum() == Attribute::ReadOnly ||
788 I->getKindAsEnum() == Attribute::ReadNone) {
790 CheckFailed("Attribute '" + I->getAsString() +
791 "' does not apply to function returns");
794 } else if (isFunction) {
795 CheckFailed("Attribute '" + I->getAsString() +
796 "' does not apply to functions!", V);
802 // VerifyParameterAttrs - Check the given attributes for an argument or return
803 // value of the specified type. The value V is printed in error messages.
804 void Verifier::VerifyParameterAttrs(AttributeSet Attrs, unsigned Idx, Type *Ty,
805 bool isReturnValue, const Value *V) {
806 if (!Attrs.hasAttributes(Idx))
809 VerifyAttributeTypes(Attrs, Idx, false, V);
812 Assert1(!Attrs.hasAttribute(Idx, Attribute::ByVal) &&
813 !Attrs.hasAttribute(Idx, Attribute::Nest) &&
814 !Attrs.hasAttribute(Idx, Attribute::StructRet) &&
815 !Attrs.hasAttribute(Idx, Attribute::NoCapture) &&
816 !Attrs.hasAttribute(Idx, Attribute::Returned),
817 "Attribute 'byval', 'nest', 'sret', 'nocapture', and 'returned' "
818 "do not apply to return values!", V);
820 // Check for mutually incompatible attributes.
821 Assert1(!((Attrs.hasAttribute(Idx, Attribute::ByVal) &&
822 Attrs.hasAttribute(Idx, Attribute::Nest)) ||
823 (Attrs.hasAttribute(Idx, Attribute::ByVal) &&
824 Attrs.hasAttribute(Idx, Attribute::StructRet)) ||
825 (Attrs.hasAttribute(Idx, Attribute::Nest) &&
826 Attrs.hasAttribute(Idx, Attribute::StructRet))), "Attributes "
827 "'byval, nest, and sret' are incompatible!", V);
829 Assert1(!((Attrs.hasAttribute(Idx, Attribute::ByVal) &&
830 Attrs.hasAttribute(Idx, Attribute::Nest)) ||
831 (Attrs.hasAttribute(Idx, Attribute::ByVal) &&
832 Attrs.hasAttribute(Idx, Attribute::InReg)) ||
833 (Attrs.hasAttribute(Idx, Attribute::Nest) &&
834 Attrs.hasAttribute(Idx, Attribute::InReg))), "Attributes "
835 "'byval, nest, and inreg' are incompatible!", V);
837 Assert1(!(Attrs.hasAttribute(Idx, Attribute::StructRet) &&
838 Attrs.hasAttribute(Idx, Attribute::Returned)), "Attributes "
839 "'sret and returned' are incompatible!", V);
841 Assert1(!(Attrs.hasAttribute(Idx, Attribute::ZExt) &&
842 Attrs.hasAttribute(Idx, Attribute::SExt)), "Attributes "
843 "'zeroext and signext' are incompatible!", V);
845 Assert1(!(Attrs.hasAttribute(Idx, Attribute::ReadNone) &&
846 Attrs.hasAttribute(Idx, Attribute::ReadOnly)), "Attributes "
847 "'readnone and readonly' are incompatible!", V);
849 Assert1(!(Attrs.hasAttribute(Idx, Attribute::NoInline) &&
850 Attrs.hasAttribute(Idx, Attribute::AlwaysInline)), "Attributes "
851 "'noinline and alwaysinline' are incompatible!", V);
853 Assert1(!AttrBuilder(Attrs, Idx).
854 hasAttributes(AttributeFuncs::typeIncompatible(Ty, Idx), Idx),
855 "Wrong types for attribute: " +
856 AttributeFuncs::typeIncompatible(Ty, Idx).getAsString(Idx), V);
858 if (PointerType *PTy = dyn_cast<PointerType>(Ty))
859 Assert1(!Attrs.hasAttribute(Idx, Attribute::ByVal) ||
860 PTy->getElementType()->isSized(),
861 "Attribute 'byval' does not support unsized types!", V);
863 Assert1(!Attrs.hasAttribute(Idx, Attribute::ByVal),
864 "Attribute 'byval' only applies to parameters with pointer type!",
868 // VerifyFunctionAttrs - Check parameter attributes against a function type.
869 // The value V is printed in error messages.
870 void Verifier::VerifyFunctionAttrs(FunctionType *FT, AttributeSet Attrs,
875 bool SawNest = false;
876 bool SawReturned = false;
878 for (unsigned i = 0, e = Attrs.getNumSlots(); i != e; ++i) {
879 unsigned Idx = Attrs.getSlotIndex(i);
883 Ty = FT->getReturnType();
884 else if (Idx-1 < FT->getNumParams())
885 Ty = FT->getParamType(Idx-1);
887 break; // VarArgs attributes, verified elsewhere.
889 VerifyParameterAttrs(Attrs, Idx, Ty, Idx == 0, V);
894 if (Attrs.hasAttribute(Idx, Attribute::Nest)) {
895 Assert1(!SawNest, "More than one parameter has attribute nest!", V);
899 if (Attrs.hasAttribute(Idx, Attribute::Returned)) {
900 Assert1(!SawReturned, "More than one parameter has attribute returned!",
902 Assert1(Ty->canLosslesslyBitCastTo(FT->getReturnType()), "Incompatible "
903 "argument and return types for 'returned' attribute", V);
907 if (Attrs.hasAttribute(Idx, Attribute::StructRet))
908 Assert1(Idx == 1, "Attribute sret is not on first parameter!", V);
911 if (!Attrs.hasAttributes(AttributeSet::FunctionIndex))
914 VerifyAttributeTypes(Attrs, AttributeSet::FunctionIndex, true, V);
916 Assert1(!(Attrs.hasAttribute(AttributeSet::FunctionIndex,
917 Attribute::ReadNone) &&
918 Attrs.hasAttribute(AttributeSet::FunctionIndex,
919 Attribute::ReadOnly)),
920 "Attributes 'readnone and readonly' are incompatible!", V);
922 Assert1(!(Attrs.hasAttribute(AttributeSet::FunctionIndex,
923 Attribute::NoInline) &&
924 Attrs.hasAttribute(AttributeSet::FunctionIndex,
925 Attribute::AlwaysInline)),
926 "Attributes 'noinline and alwaysinline' are incompatible!", V);
928 if (Attrs.hasAttribute(AttributeSet::FunctionIndex,
929 Attribute::OptimizeNone)) {
930 Assert1(Attrs.hasAttribute(AttributeSet::FunctionIndex,
931 Attribute::NoInline),
932 "Attribute 'optnone' requires 'noinline'!", V);
934 Assert1(!Attrs.hasAttribute(AttributeSet::FunctionIndex,
935 Attribute::OptimizeForSize),
936 "Attributes 'optsize and optnone' are incompatible!", V);
938 Assert1(!Attrs.hasAttribute(AttributeSet::FunctionIndex,
940 "Attributes 'minsize and optnone' are incompatible!", V);
944 void Verifier::VerifyBitcastType(const Value *V, Type *DestTy, Type *SrcTy) {
945 // Get the size of the types in bits, we'll need this later
946 unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
947 unsigned DestBitSize = DestTy->getPrimitiveSizeInBits();
949 // BitCast implies a no-op cast of type only. No bits change.
950 // However, you can't cast pointers to anything but pointers.
951 Assert1(SrcTy->isPointerTy() == DestTy->isPointerTy(),
952 "Bitcast requires both operands to be pointer or neither", V);
953 Assert1(SrcBitSize == DestBitSize,
954 "Bitcast requires types of same width", V);
956 // Disallow aggregates.
957 Assert1(!SrcTy->isAggregateType(),
958 "Bitcast operand must not be aggregate", V);
959 Assert1(!DestTy->isAggregateType(),
960 "Bitcast type must not be aggregate", V);
962 // Without datalayout, assume all address spaces are the same size.
963 // Don't check if both types are not pointers.
964 // Skip casts between scalars and vectors.
966 !SrcTy->isPtrOrPtrVectorTy() ||
967 !DestTy->isPtrOrPtrVectorTy() ||
968 SrcTy->isVectorTy() != DestTy->isVectorTy()) {
972 unsigned SrcAS = SrcTy->getPointerAddressSpace();
973 unsigned DstAS = DestTy->getPointerAddressSpace();
975 Assert1(SrcAS == DstAS,
976 "Bitcasts between pointers of different address spaces is not legal."
977 "Use AddrSpaceCast instead.", V);
980 void Verifier::VerifyConstantExprBitcastType(const ConstantExpr *CE) {
981 if (CE->getOpcode() == Instruction::BitCast) {
982 Type *SrcTy = CE->getOperand(0)->getType();
983 Type *DstTy = CE->getType();
984 VerifyBitcastType(CE, DstTy, SrcTy);
988 bool Verifier::VerifyAttributeCount(AttributeSet Attrs, unsigned Params) {
989 if (Attrs.getNumSlots() == 0)
992 unsigned LastSlot = Attrs.getNumSlots() - 1;
993 unsigned LastIndex = Attrs.getSlotIndex(LastSlot);
994 if (LastIndex <= Params
995 || (LastIndex == AttributeSet::FunctionIndex
996 && (LastSlot == 0 || Attrs.getSlotIndex(LastSlot - 1) <= Params)))
1002 // visitFunction - Verify that a function is ok.
1004 void Verifier::visitFunction(Function &F) {
1005 // Check function arguments.
1006 FunctionType *FT = F.getFunctionType();
1007 unsigned NumArgs = F.arg_size();
1009 Assert1(Context == &F.getContext(),
1010 "Function context does not match Module context!", &F);
1012 Assert1(!F.hasCommonLinkage(), "Functions may not have common linkage", &F);
1013 Assert2(FT->getNumParams() == NumArgs,
1014 "# formal arguments must match # of arguments for function type!",
1016 Assert1(F.getReturnType()->isFirstClassType() ||
1017 F.getReturnType()->isVoidTy() ||
1018 F.getReturnType()->isStructTy(),
1019 "Functions cannot return aggregate values!", &F);
1021 Assert1(!F.hasStructRetAttr() || F.getReturnType()->isVoidTy(),
1022 "Invalid struct return type!", &F);
1024 AttributeSet Attrs = F.getAttributes();
1026 Assert1(VerifyAttributeCount(Attrs, FT->getNumParams()),
1027 "Attribute after last parameter!", &F);
1029 // Check function attributes.
1030 VerifyFunctionAttrs(FT, Attrs, &F);
1032 // On function declarations/definitions, we do not support the builtin
1033 // attribute. We do not check this in VerifyFunctionAttrs since that is
1034 // checking for Attributes that can/can not ever be on functions.
1035 Assert1(!Attrs.hasAttribute(AttributeSet::FunctionIndex,
1036 Attribute::Builtin),
1037 "Attribute 'builtin' can only be applied to a callsite.", &F);
1039 // Check that this function meets the restrictions on this calling convention.
1040 switch (F.getCallingConv()) {
1043 case CallingConv::C:
1045 case CallingConv::Fast:
1046 case CallingConv::Cold:
1047 case CallingConv::X86_FastCall:
1048 case CallingConv::X86_ThisCall:
1049 case CallingConv::Intel_OCL_BI:
1050 case CallingConv::PTX_Kernel:
1051 case CallingConv::PTX_Device:
1052 Assert1(!F.isVarArg(),
1053 "Varargs functions must have C calling conventions!", &F);
1057 bool isLLVMdotName = F.getName().size() >= 5 &&
1058 F.getName().substr(0, 5) == "llvm.";
1060 // Check that the argument values match the function type for this function...
1062 for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end();
1064 Assert2(I->getType() == FT->getParamType(i),
1065 "Argument value does not match function argument type!",
1066 I, FT->getParamType(i));
1067 Assert1(I->getType()->isFirstClassType(),
1068 "Function arguments must have first-class types!", I);
1070 Assert2(!I->getType()->isMetadataTy(),
1071 "Function takes metadata but isn't an intrinsic", I, &F);
1074 if (F.isMaterializable()) {
1075 // Function has a body somewhere we can't see.
1076 } else if (F.isDeclaration()) {
1077 Assert1(F.hasExternalLinkage() || F.hasDLLImportLinkage() ||
1078 F.hasExternalWeakLinkage(),
1079 "invalid linkage type for function declaration", &F);
1081 // Verify that this function (which has a body) is not named "llvm.*". It
1082 // is not legal to define intrinsics.
1083 Assert1(!isLLVMdotName, "llvm intrinsics cannot be defined!", &F);
1085 // Check the entry node
1086 BasicBlock *Entry = &F.getEntryBlock();
1087 Assert1(pred_begin(Entry) == pred_end(Entry),
1088 "Entry block to function must not have predecessors!", Entry);
1090 // The address of the entry block cannot be taken, unless it is dead.
1091 if (Entry->hasAddressTaken()) {
1092 Assert1(!BlockAddress::get(Entry)->isConstantUsed(),
1093 "blockaddress may not be used with the entry block!", Entry);
1097 // If this function is actually an intrinsic, verify that it is only used in
1098 // direct call/invokes, never having its "address taken".
1099 if (F.getIntrinsicID()) {
1101 if (F.hasAddressTaken(&U))
1102 Assert1(0, "Invalid user of intrinsic instruction!", U);
1106 // verifyBasicBlock - Verify that a basic block is well formed...
1108 void Verifier::visitBasicBlock(BasicBlock &BB) {
1109 InstsInThisBlock.clear();
1111 // Ensure that basic blocks have terminators!
1112 Assert1(BB.getTerminator(), "Basic Block does not have terminator!", &BB);
1114 // Check constraints that this basic block imposes on all of the PHI nodes in
1116 if (isa<PHINode>(BB.front())) {
1117 SmallVector<BasicBlock*, 8> Preds(pred_begin(&BB), pred_end(&BB));
1118 SmallVector<std::pair<BasicBlock*, Value*>, 8> Values;
1119 std::sort(Preds.begin(), Preds.end());
1121 for (BasicBlock::iterator I = BB.begin(); (PN = dyn_cast<PHINode>(I));++I) {
1122 // Ensure that PHI nodes have at least one entry!
1123 Assert1(PN->getNumIncomingValues() != 0,
1124 "PHI nodes must have at least one entry. If the block is dead, "
1125 "the PHI should be removed!", PN);
1126 Assert1(PN->getNumIncomingValues() == Preds.size(),
1127 "PHINode should have one entry for each predecessor of its "
1128 "parent basic block!", PN);
1130 // Get and sort all incoming values in the PHI node...
1132 Values.reserve(PN->getNumIncomingValues());
1133 for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i)
1134 Values.push_back(std::make_pair(PN->getIncomingBlock(i),
1135 PN->getIncomingValue(i)));
1136 std::sort(Values.begin(), Values.end());
1138 for (unsigned i = 0, e = Values.size(); i != e; ++i) {
1139 // Check to make sure that if there is more than one entry for a
1140 // particular basic block in this PHI node, that the incoming values are
1143 Assert4(i == 0 || Values[i].first != Values[i-1].first ||
1144 Values[i].second == Values[i-1].second,
1145 "PHI node has multiple entries for the same basic block with "
1146 "different incoming values!", PN, Values[i].first,
1147 Values[i].second, Values[i-1].second);
1149 // Check to make sure that the predecessors and PHI node entries are
1151 Assert3(Values[i].first == Preds[i],
1152 "PHI node entries do not match predecessors!", PN,
1153 Values[i].first, Preds[i]);
1159 void Verifier::visitTerminatorInst(TerminatorInst &I) {
1160 // Ensure that terminators only exist at the end of the basic block.
1161 Assert1(&I == I.getParent()->getTerminator(),
1162 "Terminator found in the middle of a basic block!", I.getParent());
1163 visitInstruction(I);
1166 void Verifier::visitBranchInst(BranchInst &BI) {
1167 if (BI.isConditional()) {
1168 Assert2(BI.getCondition()->getType()->isIntegerTy(1),
1169 "Branch condition is not 'i1' type!", &BI, BI.getCondition());
1171 visitTerminatorInst(BI);
1174 void Verifier::visitReturnInst(ReturnInst &RI) {
1175 Function *F = RI.getParent()->getParent();
1176 unsigned N = RI.getNumOperands();
1177 if (F->getReturnType()->isVoidTy())
1179 "Found return instr that returns non-void in Function of void "
1180 "return type!", &RI, F->getReturnType());
1182 Assert2(N == 1 && F->getReturnType() == RI.getOperand(0)->getType(),
1183 "Function return type does not match operand "
1184 "type of return inst!", &RI, F->getReturnType());
1186 // Check to make sure that the return value has necessary properties for
1188 visitTerminatorInst(RI);
1191 void Verifier::visitSwitchInst(SwitchInst &SI) {
1192 // Check to make sure that all of the constants in the switch instruction
1193 // have the same type as the switched-on value.
1194 Type *SwitchTy = SI.getCondition()->getType();
1195 SmallPtrSet<ConstantInt*, 32> Constants;
1196 for (SwitchInst::CaseIt i = SI.case_begin(), e = SI.case_end(); i != e; ++i) {
1197 Assert1(i.getCaseValue()->getType() == SwitchTy,
1198 "Switch constants must all be same type as switch value!", &SI);
1199 Assert2(Constants.insert(i.getCaseValue()),
1200 "Duplicate integer as switch case", &SI, i.getCaseValue());
1203 visitTerminatorInst(SI);
1206 void Verifier::visitIndirectBrInst(IndirectBrInst &BI) {
1207 Assert1(BI.getAddress()->getType()->isPointerTy(),
1208 "Indirectbr operand must have pointer type!", &BI);
1209 for (unsigned i = 0, e = BI.getNumDestinations(); i != e; ++i)
1210 Assert1(BI.getDestination(i)->getType()->isLabelTy(),
1211 "Indirectbr destinations must all have pointer type!", &BI);
1213 visitTerminatorInst(BI);
1216 void Verifier::visitSelectInst(SelectInst &SI) {
1217 Assert1(!SelectInst::areInvalidOperands(SI.getOperand(0), SI.getOperand(1),
1219 "Invalid operands for select instruction!", &SI);
1221 Assert1(SI.getTrueValue()->getType() == SI.getType(),
1222 "Select values must have same type as select instruction!", &SI);
1223 visitInstruction(SI);
1226 /// visitUserOp1 - User defined operators shouldn't live beyond the lifetime of
1227 /// a pass, if any exist, it's an error.
1229 void Verifier::visitUserOp1(Instruction &I) {
1230 Assert1(0, "User-defined operators should not live outside of a pass!", &I);
1233 void Verifier::visitTruncInst(TruncInst &I) {
1234 // Get the source and destination types
1235 Type *SrcTy = I.getOperand(0)->getType();
1236 Type *DestTy = I.getType();
1238 // Get the size of the types in bits, we'll need this later
1239 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
1240 unsigned DestBitSize = DestTy->getScalarSizeInBits();
1242 Assert1(SrcTy->isIntOrIntVectorTy(), "Trunc only operates on integer", &I);
1243 Assert1(DestTy->isIntOrIntVectorTy(), "Trunc only produces integer", &I);
1244 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1245 "trunc source and destination must both be a vector or neither", &I);
1246 Assert1(SrcBitSize > DestBitSize,"DestTy too big for Trunc", &I);
1248 visitInstruction(I);
1251 void Verifier::visitZExtInst(ZExtInst &I) {
1252 // Get the source and destination types
1253 Type *SrcTy = I.getOperand(0)->getType();
1254 Type *DestTy = I.getType();
1256 // Get the size of the types in bits, we'll need this later
1257 Assert1(SrcTy->isIntOrIntVectorTy(), "ZExt only operates on integer", &I);
1258 Assert1(DestTy->isIntOrIntVectorTy(), "ZExt only produces an integer", &I);
1259 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1260 "zext source and destination must both be a vector or neither", &I);
1261 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
1262 unsigned DestBitSize = DestTy->getScalarSizeInBits();
1264 Assert1(SrcBitSize < DestBitSize,"Type too small for ZExt", &I);
1266 visitInstruction(I);
1269 void Verifier::visitSExtInst(SExtInst &I) {
1270 // Get the source and destination types
1271 Type *SrcTy = I.getOperand(0)->getType();
1272 Type *DestTy = I.getType();
1274 // Get the size of the types in bits, we'll need this later
1275 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
1276 unsigned DestBitSize = DestTy->getScalarSizeInBits();
1278 Assert1(SrcTy->isIntOrIntVectorTy(), "SExt only operates on integer", &I);
1279 Assert1(DestTy->isIntOrIntVectorTy(), "SExt only produces an integer", &I);
1280 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1281 "sext source and destination must both be a vector or neither", &I);
1282 Assert1(SrcBitSize < DestBitSize,"Type too small for SExt", &I);
1284 visitInstruction(I);
1287 void Verifier::visitFPTruncInst(FPTruncInst &I) {
1288 // Get the source and destination types
1289 Type *SrcTy = I.getOperand(0)->getType();
1290 Type *DestTy = I.getType();
1291 // Get the size of the types in bits, we'll need this later
1292 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
1293 unsigned DestBitSize = DestTy->getScalarSizeInBits();
1295 Assert1(SrcTy->isFPOrFPVectorTy(),"FPTrunc only operates on FP", &I);
1296 Assert1(DestTy->isFPOrFPVectorTy(),"FPTrunc only produces an FP", &I);
1297 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1298 "fptrunc source and destination must both be a vector or neither",&I);
1299 Assert1(SrcBitSize > DestBitSize,"DestTy too big for FPTrunc", &I);
1301 visitInstruction(I);
1304 void Verifier::visitFPExtInst(FPExtInst &I) {
1305 // Get the source and destination types
1306 Type *SrcTy = I.getOperand(0)->getType();
1307 Type *DestTy = I.getType();
1309 // Get the size of the types in bits, we'll need this later
1310 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
1311 unsigned DestBitSize = DestTy->getScalarSizeInBits();
1313 Assert1(SrcTy->isFPOrFPVectorTy(),"FPExt only operates on FP", &I);
1314 Assert1(DestTy->isFPOrFPVectorTy(),"FPExt only produces an FP", &I);
1315 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1316 "fpext source and destination must both be a vector or neither", &I);
1317 Assert1(SrcBitSize < DestBitSize,"DestTy too small for FPExt", &I);
1319 visitInstruction(I);
1322 void Verifier::visitUIToFPInst(UIToFPInst &I) {
1323 // Get the source and destination types
1324 Type *SrcTy = I.getOperand(0)->getType();
1325 Type *DestTy = I.getType();
1327 bool SrcVec = SrcTy->isVectorTy();
1328 bool DstVec = DestTy->isVectorTy();
1330 Assert1(SrcVec == DstVec,
1331 "UIToFP source and dest must both be vector or scalar", &I);
1332 Assert1(SrcTy->isIntOrIntVectorTy(),
1333 "UIToFP source must be integer or integer vector", &I);
1334 Assert1(DestTy->isFPOrFPVectorTy(),
1335 "UIToFP result must be FP or FP vector", &I);
1337 if (SrcVec && DstVec)
1338 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1339 cast<VectorType>(DestTy)->getNumElements(),
1340 "UIToFP source and dest vector length mismatch", &I);
1342 visitInstruction(I);
1345 void Verifier::visitSIToFPInst(SIToFPInst &I) {
1346 // Get the source and destination types
1347 Type *SrcTy = I.getOperand(0)->getType();
1348 Type *DestTy = I.getType();
1350 bool SrcVec = SrcTy->isVectorTy();
1351 bool DstVec = DestTy->isVectorTy();
1353 Assert1(SrcVec == DstVec,
1354 "SIToFP source and dest must both be vector or scalar", &I);
1355 Assert1(SrcTy->isIntOrIntVectorTy(),
1356 "SIToFP source must be integer or integer vector", &I);
1357 Assert1(DestTy->isFPOrFPVectorTy(),
1358 "SIToFP result must be FP or FP vector", &I);
1360 if (SrcVec && DstVec)
1361 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1362 cast<VectorType>(DestTy)->getNumElements(),
1363 "SIToFP source and dest vector length mismatch", &I);
1365 visitInstruction(I);
1368 void Verifier::visitFPToUIInst(FPToUIInst &I) {
1369 // Get the source and destination types
1370 Type *SrcTy = I.getOperand(0)->getType();
1371 Type *DestTy = I.getType();
1373 bool SrcVec = SrcTy->isVectorTy();
1374 bool DstVec = DestTy->isVectorTy();
1376 Assert1(SrcVec == DstVec,
1377 "FPToUI source and dest must both be vector or scalar", &I);
1378 Assert1(SrcTy->isFPOrFPVectorTy(), "FPToUI source must be FP or FP vector",
1380 Assert1(DestTy->isIntOrIntVectorTy(),
1381 "FPToUI result must be integer or integer vector", &I);
1383 if (SrcVec && DstVec)
1384 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1385 cast<VectorType>(DestTy)->getNumElements(),
1386 "FPToUI source and dest vector length mismatch", &I);
1388 visitInstruction(I);
1391 void Verifier::visitFPToSIInst(FPToSIInst &I) {
1392 // Get the source and destination types
1393 Type *SrcTy = I.getOperand(0)->getType();
1394 Type *DestTy = I.getType();
1396 bool SrcVec = SrcTy->isVectorTy();
1397 bool DstVec = DestTy->isVectorTy();
1399 Assert1(SrcVec == DstVec,
1400 "FPToSI source and dest must both be vector or scalar", &I);
1401 Assert1(SrcTy->isFPOrFPVectorTy(),
1402 "FPToSI source must be FP or FP vector", &I);
1403 Assert1(DestTy->isIntOrIntVectorTy(),
1404 "FPToSI result must be integer or integer vector", &I);
1406 if (SrcVec && DstVec)
1407 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1408 cast<VectorType>(DestTy)->getNumElements(),
1409 "FPToSI source and dest vector length mismatch", &I);
1411 visitInstruction(I);
1414 void Verifier::visitPtrToIntInst(PtrToIntInst &I) {
1415 // Get the source and destination types
1416 Type *SrcTy = I.getOperand(0)->getType();
1417 Type *DestTy = I.getType();
1419 Assert1(SrcTy->getScalarType()->isPointerTy(),
1420 "PtrToInt source must be pointer", &I);
1421 Assert1(DestTy->getScalarType()->isIntegerTy(),
1422 "PtrToInt result must be integral", &I);
1423 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1424 "PtrToInt type mismatch", &I);
1426 if (SrcTy->isVectorTy()) {
1427 VectorType *VSrc = dyn_cast<VectorType>(SrcTy);
1428 VectorType *VDest = dyn_cast<VectorType>(DestTy);
1429 Assert1(VSrc->getNumElements() == VDest->getNumElements(),
1430 "PtrToInt Vector width mismatch", &I);
1433 visitInstruction(I);
1436 void Verifier::visitIntToPtrInst(IntToPtrInst &I) {
1437 // Get the source and destination types
1438 Type *SrcTy = I.getOperand(0)->getType();
1439 Type *DestTy = I.getType();
1441 Assert1(SrcTy->getScalarType()->isIntegerTy(),
1442 "IntToPtr source must be an integral", &I);
1443 Assert1(DestTy->getScalarType()->isPointerTy(),
1444 "IntToPtr result must be a pointer",&I);
1445 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1446 "IntToPtr type mismatch", &I);
1447 if (SrcTy->isVectorTy()) {
1448 VectorType *VSrc = dyn_cast<VectorType>(SrcTy);
1449 VectorType *VDest = dyn_cast<VectorType>(DestTy);
1450 Assert1(VSrc->getNumElements() == VDest->getNumElements(),
1451 "IntToPtr Vector width mismatch", &I);
1453 visitInstruction(I);
1456 void Verifier::visitBitCastInst(BitCastInst &I) {
1457 Type *SrcTy = I.getOperand(0)->getType();
1458 Type *DestTy = I.getType();
1459 VerifyBitcastType(&I, DestTy, SrcTy);
1460 visitInstruction(I);
1463 void Verifier::visitAddrSpaceCastInst(AddrSpaceCastInst &I) {
1464 Type *SrcTy = I.getOperand(0)->getType();
1465 Type *DestTy = I.getType();
1467 Assert1(SrcTy->isPtrOrPtrVectorTy(),
1468 "AddrSpaceCast source must be a pointer", &I);
1469 Assert1(DestTy->isPtrOrPtrVectorTy(),
1470 "AddrSpaceCast result must be a pointer", &I);
1471 Assert1(SrcTy->getPointerAddressSpace() != DestTy->getPointerAddressSpace(),
1472 "AddrSpaceCast must be between different address spaces", &I);
1473 if (SrcTy->isVectorTy())
1474 Assert1(SrcTy->getVectorNumElements() == DestTy->getVectorNumElements(),
1475 "AddrSpaceCast vector pointer number of elements mismatch", &I);
1476 visitInstruction(I);
1479 /// visitPHINode - Ensure that a PHI node is well formed.
1481 void Verifier::visitPHINode(PHINode &PN) {
1482 // Ensure that the PHI nodes are all grouped together at the top of the block.
1483 // This can be tested by checking whether the instruction before this is
1484 // either nonexistent (because this is begin()) or is a PHI node. If not,
1485 // then there is some other instruction before a PHI.
1486 Assert2(&PN == &PN.getParent()->front() ||
1487 isa<PHINode>(--BasicBlock::iterator(&PN)),
1488 "PHI nodes not grouped at top of basic block!",
1489 &PN, PN.getParent());
1491 // Check that all of the values of the PHI node have the same type as the
1492 // result, and that the incoming blocks are really basic blocks.
1493 for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i) {
1494 Assert1(PN.getType() == PN.getIncomingValue(i)->getType(),
1495 "PHI node operands are not the same type as the result!", &PN);
1498 // All other PHI node constraints are checked in the visitBasicBlock method.
1500 visitInstruction(PN);
1503 void Verifier::VerifyCallSite(CallSite CS) {
1504 Instruction *I = CS.getInstruction();
1506 Assert1(CS.getCalledValue()->getType()->isPointerTy(),
1507 "Called function must be a pointer!", I);
1508 PointerType *FPTy = cast<PointerType>(CS.getCalledValue()->getType());
1510 Assert1(FPTy->getElementType()->isFunctionTy(),
1511 "Called function is not pointer to function type!", I);
1512 FunctionType *FTy = cast<FunctionType>(FPTy->getElementType());
1514 // Verify that the correct number of arguments are being passed
1515 if (FTy->isVarArg())
1516 Assert1(CS.arg_size() >= FTy->getNumParams(),
1517 "Called function requires more parameters than were provided!",I);
1519 Assert1(CS.arg_size() == FTy->getNumParams(),
1520 "Incorrect number of arguments passed to called function!", I);
1522 // Verify that all arguments to the call match the function type.
1523 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
1524 Assert3(CS.getArgument(i)->getType() == FTy->getParamType(i),
1525 "Call parameter type does not match function signature!",
1526 CS.getArgument(i), FTy->getParamType(i), I);
1528 AttributeSet Attrs = CS.getAttributes();
1530 Assert1(VerifyAttributeCount(Attrs, CS.arg_size()),
1531 "Attribute after last parameter!", I);
1533 // Verify call attributes.
1534 VerifyFunctionAttrs(FTy, Attrs, I);
1536 if (FTy->isVarArg()) {
1537 // FIXME? is 'nest' even legal here?
1538 bool SawNest = false;
1539 bool SawReturned = false;
1541 for (unsigned Idx = 1; Idx < 1 + FTy->getNumParams(); ++Idx) {
1542 if (Attrs.hasAttribute(Idx, Attribute::Nest))
1544 if (Attrs.hasAttribute(Idx, Attribute::Returned))
1548 // Check attributes on the varargs part.
1549 for (unsigned Idx = 1 + FTy->getNumParams(); Idx <= CS.arg_size(); ++Idx) {
1550 Type *Ty = CS.getArgument(Idx-1)->getType();
1551 VerifyParameterAttrs(Attrs, Idx, Ty, false, I);
1553 if (Attrs.hasAttribute(Idx, Attribute::Nest)) {
1554 Assert1(!SawNest, "More than one parameter has attribute nest!", I);
1558 if (Attrs.hasAttribute(Idx, Attribute::Returned)) {
1559 Assert1(!SawReturned, "More than one parameter has attribute returned!",
1561 Assert1(Ty->canLosslesslyBitCastTo(FTy->getReturnType()),
1562 "Incompatible argument and return types for 'returned' "
1567 Assert1(!Attrs.hasAttribute(Idx, Attribute::StructRet),
1568 "Attribute 'sret' cannot be used for vararg call arguments!", I);
1572 // Verify that there's no metadata unless it's a direct call to an intrinsic.
1573 if (CS.getCalledFunction() == 0 ||
1574 !CS.getCalledFunction()->getName().startswith("llvm.")) {
1575 for (FunctionType::param_iterator PI = FTy->param_begin(),
1576 PE = FTy->param_end(); PI != PE; ++PI)
1577 Assert1(!(*PI)->isMetadataTy(),
1578 "Function has metadata parameter but isn't an intrinsic", I);
1581 visitInstruction(*I);
1584 void Verifier::visitCallInst(CallInst &CI) {
1585 VerifyCallSite(&CI);
1587 if (Function *F = CI.getCalledFunction())
1588 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
1589 visitIntrinsicFunctionCall(ID, CI);
1592 void Verifier::visitInvokeInst(InvokeInst &II) {
1593 VerifyCallSite(&II);
1595 // Verify that there is a landingpad instruction as the first non-PHI
1596 // instruction of the 'unwind' destination.
1597 Assert1(II.getUnwindDest()->isLandingPad(),
1598 "The unwind destination does not have a landingpad instruction!",&II);
1600 visitTerminatorInst(II);
1603 /// visitBinaryOperator - Check that both arguments to the binary operator are
1604 /// of the same type!
1606 void Verifier::visitBinaryOperator(BinaryOperator &B) {
1607 Assert1(B.getOperand(0)->getType() == B.getOperand(1)->getType(),
1608 "Both operands to a binary operator are not of the same type!", &B);
1610 switch (B.getOpcode()) {
1611 // Check that integer arithmetic operators are only used with
1612 // integral operands.
1613 case Instruction::Add:
1614 case Instruction::Sub:
1615 case Instruction::Mul:
1616 case Instruction::SDiv:
1617 case Instruction::UDiv:
1618 case Instruction::SRem:
1619 case Instruction::URem:
1620 Assert1(B.getType()->isIntOrIntVectorTy(),
1621 "Integer arithmetic operators only work with integral types!", &B);
1622 Assert1(B.getType() == B.getOperand(0)->getType(),
1623 "Integer arithmetic operators must have same type "
1624 "for operands and result!", &B);
1626 // Check that floating-point arithmetic operators are only used with
1627 // floating-point operands.
1628 case Instruction::FAdd:
1629 case Instruction::FSub:
1630 case Instruction::FMul:
1631 case Instruction::FDiv:
1632 case Instruction::FRem:
1633 Assert1(B.getType()->isFPOrFPVectorTy(),
1634 "Floating-point arithmetic operators only work with "
1635 "floating-point types!", &B);
1636 Assert1(B.getType() == B.getOperand(0)->getType(),
1637 "Floating-point arithmetic operators must have same type "
1638 "for operands and result!", &B);
1640 // Check that logical operators are only used with integral operands.
1641 case Instruction::And:
1642 case Instruction::Or:
1643 case Instruction::Xor:
1644 Assert1(B.getType()->isIntOrIntVectorTy(),
1645 "Logical operators only work with integral types!", &B);
1646 Assert1(B.getType() == B.getOperand(0)->getType(),
1647 "Logical operators must have same type for operands and result!",
1650 case Instruction::Shl:
1651 case Instruction::LShr:
1652 case Instruction::AShr:
1653 Assert1(B.getType()->isIntOrIntVectorTy(),
1654 "Shifts only work with integral types!", &B);
1655 Assert1(B.getType() == B.getOperand(0)->getType(),
1656 "Shift return type must be same as operands!", &B);
1659 llvm_unreachable("Unknown BinaryOperator opcode!");
1662 visitInstruction(B);
1665 void Verifier::visitICmpInst(ICmpInst &IC) {
1666 // Check that the operands are the same type
1667 Type *Op0Ty = IC.getOperand(0)->getType();
1668 Type *Op1Ty = IC.getOperand(1)->getType();
1669 Assert1(Op0Ty == Op1Ty,
1670 "Both operands to ICmp instruction are not of the same type!", &IC);
1671 // Check that the operands are the right type
1672 Assert1(Op0Ty->isIntOrIntVectorTy() || Op0Ty->getScalarType()->isPointerTy(),
1673 "Invalid operand types for ICmp instruction", &IC);
1674 // Check that the predicate is valid.
1675 Assert1(IC.getPredicate() >= CmpInst::FIRST_ICMP_PREDICATE &&
1676 IC.getPredicate() <= CmpInst::LAST_ICMP_PREDICATE,
1677 "Invalid predicate in ICmp instruction!", &IC);
1679 visitInstruction(IC);
1682 void Verifier::visitFCmpInst(FCmpInst &FC) {
1683 // Check that the operands are the same type
1684 Type *Op0Ty = FC.getOperand(0)->getType();
1685 Type *Op1Ty = FC.getOperand(1)->getType();
1686 Assert1(Op0Ty == Op1Ty,
1687 "Both operands to FCmp instruction are not of the same type!", &FC);
1688 // Check that the operands are the right type
1689 Assert1(Op0Ty->isFPOrFPVectorTy(),
1690 "Invalid operand types for FCmp instruction", &FC);
1691 // Check that the predicate is valid.
1692 Assert1(FC.getPredicate() >= CmpInst::FIRST_FCMP_PREDICATE &&
1693 FC.getPredicate() <= CmpInst::LAST_FCMP_PREDICATE,
1694 "Invalid predicate in FCmp instruction!", &FC);
1696 visitInstruction(FC);
1699 void Verifier::visitExtractElementInst(ExtractElementInst &EI) {
1700 Assert1(ExtractElementInst::isValidOperands(EI.getOperand(0),
1702 "Invalid extractelement operands!", &EI);
1703 visitInstruction(EI);
1706 void Verifier::visitInsertElementInst(InsertElementInst &IE) {
1707 Assert1(InsertElementInst::isValidOperands(IE.getOperand(0),
1710 "Invalid insertelement operands!", &IE);
1711 visitInstruction(IE);
1714 void Verifier::visitShuffleVectorInst(ShuffleVectorInst &SV) {
1715 Assert1(ShuffleVectorInst::isValidOperands(SV.getOperand(0), SV.getOperand(1),
1717 "Invalid shufflevector operands!", &SV);
1718 visitInstruction(SV);
1721 void Verifier::visitGetElementPtrInst(GetElementPtrInst &GEP) {
1722 Type *TargetTy = GEP.getPointerOperandType()->getScalarType();
1724 Assert1(isa<PointerType>(TargetTy),
1725 "GEP base pointer is not a vector or a vector of pointers", &GEP);
1726 Assert1(cast<PointerType>(TargetTy)->getElementType()->isSized(),
1727 "GEP into unsized type!", &GEP);
1728 Assert1(GEP.getPointerOperandType()->isVectorTy() ==
1729 GEP.getType()->isVectorTy(), "Vector GEP must return a vector value",
1732 SmallVector<Value*, 16> Idxs(GEP.idx_begin(), GEP.idx_end());
1734 GetElementPtrInst::getIndexedType(GEP.getPointerOperandType(), Idxs);
1735 Assert1(ElTy, "Invalid indices for GEP pointer type!", &GEP);
1737 Assert2(GEP.getType()->getScalarType()->isPointerTy() &&
1738 cast<PointerType>(GEP.getType()->getScalarType())->getElementType()
1739 == ElTy, "GEP is not of right type for indices!", &GEP, ElTy);
1741 if (GEP.getPointerOperandType()->isVectorTy()) {
1742 // Additional checks for vector GEPs.
1743 unsigned GepWidth = GEP.getPointerOperandType()->getVectorNumElements();
1744 Assert1(GepWidth == GEP.getType()->getVectorNumElements(),
1745 "Vector GEP result width doesn't match operand's", &GEP);
1746 for (unsigned i = 0, e = Idxs.size(); i != e; ++i) {
1747 Type *IndexTy = Idxs[i]->getType();
1748 Assert1(IndexTy->isVectorTy(),
1749 "Vector GEP must have vector indices!", &GEP);
1750 unsigned IndexWidth = IndexTy->getVectorNumElements();
1751 Assert1(IndexWidth == GepWidth, "Invalid GEP index vector width", &GEP);
1754 visitInstruction(GEP);
1757 static bool isContiguous(const ConstantRange &A, const ConstantRange &B) {
1758 return A.getUpper() == B.getLower() || A.getLower() == B.getUpper();
1761 void Verifier::visitLoadInst(LoadInst &LI) {
1762 PointerType *PTy = dyn_cast<PointerType>(LI.getOperand(0)->getType());
1763 Assert1(PTy, "Load operand must be a pointer.", &LI);
1764 Type *ElTy = PTy->getElementType();
1765 Assert2(ElTy == LI.getType(),
1766 "Load result type does not match pointer operand type!", &LI, ElTy);
1767 if (LI.isAtomic()) {
1768 Assert1(LI.getOrdering() != Release && LI.getOrdering() != AcquireRelease,
1769 "Load cannot have Release ordering", &LI);
1770 Assert1(LI.getAlignment() != 0,
1771 "Atomic load must specify explicit alignment", &LI);
1772 if (!ElTy->isPointerTy()) {
1773 Assert2(ElTy->isIntegerTy(),
1774 "atomic store operand must have integer type!",
1776 unsigned Size = ElTy->getPrimitiveSizeInBits();
1777 Assert2(Size >= 8 && !(Size & (Size - 1)),
1778 "atomic store operand must be power-of-two byte-sized integer",
1782 Assert1(LI.getSynchScope() == CrossThread,
1783 "Non-atomic load cannot have SynchronizationScope specified", &LI);
1786 if (MDNode *Range = LI.getMetadata(LLVMContext::MD_range)) {
1787 unsigned NumOperands = Range->getNumOperands();
1788 Assert1(NumOperands % 2 == 0, "Unfinished range!", Range);
1789 unsigned NumRanges = NumOperands / 2;
1790 Assert1(NumRanges >= 1, "It should have at least one range!", Range);
1792 ConstantRange LastRange(1); // Dummy initial value
1793 for (unsigned i = 0; i < NumRanges; ++i) {
1794 ConstantInt *Low = dyn_cast<ConstantInt>(Range->getOperand(2*i));
1795 Assert1(Low, "The lower limit must be an integer!", Low);
1796 ConstantInt *High = dyn_cast<ConstantInt>(Range->getOperand(2*i + 1));
1797 Assert1(High, "The upper limit must be an integer!", High);
1798 Assert1(High->getType() == Low->getType() &&
1799 High->getType() == ElTy, "Range types must match load type!",
1802 APInt HighV = High->getValue();
1803 APInt LowV = Low->getValue();
1804 ConstantRange CurRange(LowV, HighV);
1805 Assert1(!CurRange.isEmptySet() && !CurRange.isFullSet(),
1806 "Range must not be empty!", Range);
1808 Assert1(CurRange.intersectWith(LastRange).isEmptySet(),
1809 "Intervals are overlapping", Range);
1810 Assert1(LowV.sgt(LastRange.getLower()), "Intervals are not in order",
1812 Assert1(!isContiguous(CurRange, LastRange), "Intervals are contiguous",
1815 LastRange = ConstantRange(LowV, HighV);
1817 if (NumRanges > 2) {
1819 dyn_cast<ConstantInt>(Range->getOperand(0))->getValue();
1821 dyn_cast<ConstantInt>(Range->getOperand(1))->getValue();
1822 ConstantRange FirstRange(FirstLow, FirstHigh);
1823 Assert1(FirstRange.intersectWith(LastRange).isEmptySet(),
1824 "Intervals are overlapping", Range);
1825 Assert1(!isContiguous(FirstRange, LastRange), "Intervals are contiguous",
1832 visitInstruction(LI);
1835 void Verifier::visitStoreInst(StoreInst &SI) {
1836 PointerType *PTy = dyn_cast<PointerType>(SI.getOperand(1)->getType());
1837 Assert1(PTy, "Store operand must be a pointer.", &SI);
1838 Type *ElTy = PTy->getElementType();
1839 Assert2(ElTy == SI.getOperand(0)->getType(),
1840 "Stored value type does not match pointer operand type!",
1842 if (SI.isAtomic()) {
1843 Assert1(SI.getOrdering() != Acquire && SI.getOrdering() != AcquireRelease,
1844 "Store cannot have Acquire ordering", &SI);
1845 Assert1(SI.getAlignment() != 0,
1846 "Atomic store must specify explicit alignment", &SI);
1847 if (!ElTy->isPointerTy()) {
1848 Assert2(ElTy->isIntegerTy(),
1849 "atomic store operand must have integer type!",
1851 unsigned Size = ElTy->getPrimitiveSizeInBits();
1852 Assert2(Size >= 8 && !(Size & (Size - 1)),
1853 "atomic store operand must be power-of-two byte-sized integer",
1857 Assert1(SI.getSynchScope() == CrossThread,
1858 "Non-atomic store cannot have SynchronizationScope specified", &SI);
1860 visitInstruction(SI);
1863 void Verifier::visitAllocaInst(AllocaInst &AI) {
1864 PointerType *PTy = AI.getType();
1865 Assert1(PTy->getAddressSpace() == 0,
1866 "Allocation instruction pointer not in the generic address space!",
1868 Assert1(PTy->getElementType()->isSized(), "Cannot allocate unsized type",
1870 Assert1(AI.getArraySize()->getType()->isIntegerTy(),
1871 "Alloca array size must have integer type", &AI);
1872 visitInstruction(AI);
1875 void Verifier::visitAtomicCmpXchgInst(AtomicCmpXchgInst &CXI) {
1876 Assert1(CXI.getOrdering() != NotAtomic,
1877 "cmpxchg instructions must be atomic.", &CXI);
1878 Assert1(CXI.getOrdering() != Unordered,
1879 "cmpxchg instructions cannot be unordered.", &CXI);
1880 PointerType *PTy = dyn_cast<PointerType>(CXI.getOperand(0)->getType());
1881 Assert1(PTy, "First cmpxchg operand must be a pointer.", &CXI);
1882 Type *ElTy = PTy->getElementType();
1883 Assert2(ElTy->isIntegerTy(),
1884 "cmpxchg operand must have integer type!",
1886 unsigned Size = ElTy->getPrimitiveSizeInBits();
1887 Assert2(Size >= 8 && !(Size & (Size - 1)),
1888 "cmpxchg operand must be power-of-two byte-sized integer",
1890 Assert2(ElTy == CXI.getOperand(1)->getType(),
1891 "Expected value type does not match pointer operand type!",
1893 Assert2(ElTy == CXI.getOperand(2)->getType(),
1894 "Stored value type does not match pointer operand type!",
1896 visitInstruction(CXI);
1899 void Verifier::visitAtomicRMWInst(AtomicRMWInst &RMWI) {
1900 Assert1(RMWI.getOrdering() != NotAtomic,
1901 "atomicrmw instructions must be atomic.", &RMWI);
1902 Assert1(RMWI.getOrdering() != Unordered,
1903 "atomicrmw instructions cannot be unordered.", &RMWI);
1904 PointerType *PTy = dyn_cast<PointerType>(RMWI.getOperand(0)->getType());
1905 Assert1(PTy, "First atomicrmw operand must be a pointer.", &RMWI);
1906 Type *ElTy = PTy->getElementType();
1907 Assert2(ElTy->isIntegerTy(),
1908 "atomicrmw operand must have integer type!",
1910 unsigned Size = ElTy->getPrimitiveSizeInBits();
1911 Assert2(Size >= 8 && !(Size & (Size - 1)),
1912 "atomicrmw operand must be power-of-two byte-sized integer",
1914 Assert2(ElTy == RMWI.getOperand(1)->getType(),
1915 "Argument value type does not match pointer operand type!",
1917 Assert1(AtomicRMWInst::FIRST_BINOP <= RMWI.getOperation() &&
1918 RMWI.getOperation() <= AtomicRMWInst::LAST_BINOP,
1919 "Invalid binary operation!", &RMWI);
1920 visitInstruction(RMWI);
1923 void Verifier::visitFenceInst(FenceInst &FI) {
1924 const AtomicOrdering Ordering = FI.getOrdering();
1925 Assert1(Ordering == Acquire || Ordering == Release ||
1926 Ordering == AcquireRelease || Ordering == SequentiallyConsistent,
1927 "fence instructions may only have "
1928 "acquire, release, acq_rel, or seq_cst ordering.", &FI);
1929 visitInstruction(FI);
1932 void Verifier::visitExtractValueInst(ExtractValueInst &EVI) {
1933 Assert1(ExtractValueInst::getIndexedType(EVI.getAggregateOperand()->getType(),
1934 EVI.getIndices()) ==
1936 "Invalid ExtractValueInst operands!", &EVI);
1938 visitInstruction(EVI);
1941 void Verifier::visitInsertValueInst(InsertValueInst &IVI) {
1942 Assert1(ExtractValueInst::getIndexedType(IVI.getAggregateOperand()->getType(),
1943 IVI.getIndices()) ==
1944 IVI.getOperand(1)->getType(),
1945 "Invalid InsertValueInst operands!", &IVI);
1947 visitInstruction(IVI);
1950 void Verifier::visitLandingPadInst(LandingPadInst &LPI) {
1951 BasicBlock *BB = LPI.getParent();
1953 // The landingpad instruction is ill-formed if it doesn't have any clauses and
1955 Assert1(LPI.getNumClauses() > 0 || LPI.isCleanup(),
1956 "LandingPadInst needs at least one clause or to be a cleanup.", &LPI);
1958 // The landingpad instruction defines its parent as a landing pad block. The
1959 // landing pad block may be branched to only by the unwind edge of an invoke.
1960 for (pred_iterator I = pred_begin(BB), E = pred_end(BB); I != E; ++I) {
1961 const InvokeInst *II = dyn_cast<InvokeInst>((*I)->getTerminator());
1962 Assert1(II && II->getUnwindDest() == BB && II->getNormalDest() != BB,
1963 "Block containing LandingPadInst must be jumped to "
1964 "only by the unwind edge of an invoke.", &LPI);
1967 // The landingpad instruction must be the first non-PHI instruction in the
1969 Assert1(LPI.getParent()->getLandingPadInst() == &LPI,
1970 "LandingPadInst not the first non-PHI instruction in the block.",
1973 // The personality functions for all landingpad instructions within the same
1974 // function should match.
1976 Assert1(LPI.getPersonalityFn() == PersonalityFn,
1977 "Personality function doesn't match others in function", &LPI);
1978 PersonalityFn = LPI.getPersonalityFn();
1980 // All operands must be constants.
1981 Assert1(isa<Constant>(PersonalityFn), "Personality function is not constant!",
1983 for (unsigned i = 0, e = LPI.getNumClauses(); i < e; ++i) {
1984 Value *Clause = LPI.getClause(i);
1985 Assert1(isa<Constant>(Clause), "Clause is not constant!", &LPI);
1986 if (LPI.isCatch(i)) {
1987 Assert1(isa<PointerType>(Clause->getType()),
1988 "Catch operand does not have pointer type!", &LPI);
1990 Assert1(LPI.isFilter(i), "Clause is neither catch nor filter!", &LPI);
1991 Assert1(isa<ConstantArray>(Clause) || isa<ConstantAggregateZero>(Clause),
1992 "Filter operand is not an array of constants!", &LPI);
1996 visitInstruction(LPI);
1999 void Verifier::verifyDominatesUse(Instruction &I, unsigned i) {
2000 Instruction *Op = cast<Instruction>(I.getOperand(i));
2001 // If the we have an invalid invoke, don't try to compute the dominance.
2002 // We already reject it in the invoke specific checks and the dominance
2003 // computation doesn't handle multiple edges.
2004 if (InvokeInst *II = dyn_cast<InvokeInst>(Op)) {
2005 if (II->getNormalDest() == II->getUnwindDest())
2009 const Use &U = I.getOperandUse(i);
2010 Assert2(InstsInThisBlock.count(Op) || DT->dominates(Op, U),
2011 "Instruction does not dominate all uses!", Op, &I);
2014 /// verifyInstruction - Verify that an instruction is well formed.
2016 void Verifier::visitInstruction(Instruction &I) {
2017 BasicBlock *BB = I.getParent();
2018 Assert1(BB, "Instruction not embedded in basic block!", &I);
2020 if (!isa<PHINode>(I)) { // Check that non-phi nodes are not self referential
2021 for (Value::use_iterator UI = I.use_begin(), UE = I.use_end();
2023 Assert1(*UI != (User*)&I || !DT->isReachableFromEntry(BB),
2024 "Only PHI nodes may reference their own value!", &I);
2027 // Check that void typed values don't have names
2028 Assert1(!I.getType()->isVoidTy() || !I.hasName(),
2029 "Instruction has a name, but provides a void value!", &I);
2031 // Check that the return value of the instruction is either void or a legal
2033 Assert1(I.getType()->isVoidTy() ||
2034 I.getType()->isFirstClassType(),
2035 "Instruction returns a non-scalar type!", &I);
2037 // Check that the instruction doesn't produce metadata. Calls are already
2038 // checked against the callee type.
2039 Assert1(!I.getType()->isMetadataTy() ||
2040 isa<CallInst>(I) || isa<InvokeInst>(I),
2041 "Invalid use of metadata!", &I);
2043 // Check that all uses of the instruction, if they are instructions
2044 // themselves, actually have parent basic blocks. If the use is not an
2045 // instruction, it is an error!
2046 for (User::use_iterator UI = I.use_begin(), UE = I.use_end();
2048 if (Instruction *Used = dyn_cast<Instruction>(*UI))
2049 Assert2(Used->getParent() != 0, "Instruction referencing instruction not"
2050 " embedded in a basic block!", &I, Used);
2052 CheckFailed("Use of instruction is not an instruction!", *UI);
2057 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
2058 Assert1(I.getOperand(i) != 0, "Instruction has null operand!", &I);
2060 // Check to make sure that only first-class-values are operands to
2062 if (!I.getOperand(i)->getType()->isFirstClassType()) {
2063 Assert1(0, "Instruction operands must be first-class values!", &I);
2066 if (Function *F = dyn_cast<Function>(I.getOperand(i))) {
2067 // Check to make sure that the "address of" an intrinsic function is never
2069 Assert1(!F->isIntrinsic() || i == (isa<CallInst>(I) ? e-1 : 0),
2070 "Cannot take the address of an intrinsic!", &I);
2071 Assert1(!F->isIntrinsic() || isa<CallInst>(I) ||
2072 F->getIntrinsicID() == Intrinsic::donothing,
2073 "Cannot invoke an intrinsinc other than donothing", &I);
2074 Assert1(F->getParent() == Mod, "Referencing function in another module!",
2076 } else if (BasicBlock *OpBB = dyn_cast<BasicBlock>(I.getOperand(i))) {
2077 Assert1(OpBB->getParent() == BB->getParent(),
2078 "Referring to a basic block in another function!", &I);
2079 } else if (Argument *OpArg = dyn_cast<Argument>(I.getOperand(i))) {
2080 Assert1(OpArg->getParent() == BB->getParent(),
2081 "Referring to an argument in another function!", &I);
2082 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(I.getOperand(i))) {
2083 Assert1(GV->getParent() == Mod, "Referencing global in another module!",
2085 } else if (isa<Instruction>(I.getOperand(i))) {
2086 verifyDominatesUse(I, i);
2087 } else if (isa<InlineAsm>(I.getOperand(i))) {
2088 Assert1((i + 1 == e && isa<CallInst>(I)) ||
2089 (i + 3 == e && isa<InvokeInst>(I)),
2090 "Cannot take the address of an inline asm!", &I);
2091 } else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(I.getOperand(i))) {
2092 if (CE->getType()->isPtrOrPtrVectorTy()) {
2093 // If we have a ConstantExpr pointer, we need to see if it came from an
2094 // illegal bitcast (inttoptr <constant int> )
2095 SmallVector<const ConstantExpr *, 4> Stack;
2096 SmallPtrSet<const ConstantExpr *, 4> Visited;
2097 Stack.push_back(CE);
2099 while (!Stack.empty()) {
2100 const ConstantExpr *V = Stack.pop_back_val();
2101 if (!Visited.insert(V))
2104 VerifyConstantExprBitcastType(V);
2106 for (unsigned I = 0, N = V->getNumOperands(); I != N; ++I) {
2107 if (ConstantExpr *Op = dyn_cast<ConstantExpr>(V->getOperand(I)))
2108 Stack.push_back(Op);
2115 if (MDNode *MD = I.getMetadata(LLVMContext::MD_fpmath)) {
2116 Assert1(I.getType()->isFPOrFPVectorTy(),
2117 "fpmath requires a floating point result!", &I);
2118 Assert1(MD->getNumOperands() == 1, "fpmath takes one operand!", &I);
2119 Value *Op0 = MD->getOperand(0);
2120 if (ConstantFP *CFP0 = dyn_cast_or_null<ConstantFP>(Op0)) {
2121 APFloat Accuracy = CFP0->getValueAPF();
2122 Assert1(Accuracy.isFiniteNonZero() && !Accuracy.isNegative(),
2123 "fpmath accuracy not a positive number!", &I);
2125 Assert1(false, "invalid fpmath accuracy!", &I);
2129 MDNode *MD = I.getMetadata(LLVMContext::MD_range);
2130 Assert1(!MD || isa<LoadInst>(I), "Ranges are only for loads!", &I);
2132 if (!DisableDebugInfoVerifier) {
2133 MD = I.getMetadata(LLVMContext::MD_dbg);
2134 Finder.processLocation(*Mod, DILocation(MD));
2137 InstsInThisBlock.insert(&I);
2140 /// VerifyIntrinsicType - Verify that the specified type (which comes from an
2141 /// intrinsic argument or return value) matches the type constraints specified
2142 /// by the .td file (e.g. an "any integer" argument really is an integer).
2144 /// This return true on error but does not print a message.
2145 bool Verifier::VerifyIntrinsicType(Type *Ty,
2146 ArrayRef<Intrinsic::IITDescriptor> &Infos,
2147 SmallVectorImpl<Type*> &ArgTys) {
2148 using namespace Intrinsic;
2150 // If we ran out of descriptors, there are too many arguments.
2151 if (Infos.empty()) return true;
2152 IITDescriptor D = Infos.front();
2153 Infos = Infos.slice(1);
2156 case IITDescriptor::Void: return !Ty->isVoidTy();
2157 case IITDescriptor::VarArg: return true;
2158 case IITDescriptor::MMX: return !Ty->isX86_MMXTy();
2159 case IITDescriptor::Metadata: return !Ty->isMetadataTy();
2160 case IITDescriptor::Half: return !Ty->isHalfTy();
2161 case IITDescriptor::Float: return !Ty->isFloatTy();
2162 case IITDescriptor::Double: return !Ty->isDoubleTy();
2163 case IITDescriptor::Integer: return !Ty->isIntegerTy(D.Integer_Width);
2164 case IITDescriptor::Vector: {
2165 VectorType *VT = dyn_cast<VectorType>(Ty);
2166 return VT == 0 || VT->getNumElements() != D.Vector_Width ||
2167 VerifyIntrinsicType(VT->getElementType(), Infos, ArgTys);
2169 case IITDescriptor::Pointer: {
2170 PointerType *PT = dyn_cast<PointerType>(Ty);
2171 return PT == 0 || PT->getAddressSpace() != D.Pointer_AddressSpace ||
2172 VerifyIntrinsicType(PT->getElementType(), Infos, ArgTys);
2175 case IITDescriptor::Struct: {
2176 StructType *ST = dyn_cast<StructType>(Ty);
2177 if (ST == 0 || ST->getNumElements() != D.Struct_NumElements)
2180 for (unsigned i = 0, e = D.Struct_NumElements; i != e; ++i)
2181 if (VerifyIntrinsicType(ST->getElementType(i), Infos, ArgTys))
2186 case IITDescriptor::Argument:
2187 // Two cases here - If this is the second occurrence of an argument, verify
2188 // that the later instance matches the previous instance.
2189 if (D.getArgumentNumber() < ArgTys.size())
2190 return Ty != ArgTys[D.getArgumentNumber()];
2192 // Otherwise, if this is the first instance of an argument, record it and
2193 // verify the "Any" kind.
2194 assert(D.getArgumentNumber() == ArgTys.size() && "Table consistency error");
2195 ArgTys.push_back(Ty);
2197 switch (D.getArgumentKind()) {
2198 case IITDescriptor::AK_AnyInteger: return !Ty->isIntOrIntVectorTy();
2199 case IITDescriptor::AK_AnyFloat: return !Ty->isFPOrFPVectorTy();
2200 case IITDescriptor::AK_AnyVector: return !isa<VectorType>(Ty);
2201 case IITDescriptor::AK_AnyPointer: return !isa<PointerType>(Ty);
2203 llvm_unreachable("all argument kinds not covered");
2205 case IITDescriptor::ExtendVecArgument:
2206 // This may only be used when referring to a previous vector argument.
2207 return D.getArgumentNumber() >= ArgTys.size() ||
2208 !isa<VectorType>(ArgTys[D.getArgumentNumber()]) ||
2209 VectorType::getExtendedElementVectorType(
2210 cast<VectorType>(ArgTys[D.getArgumentNumber()])) != Ty;
2212 case IITDescriptor::TruncVecArgument:
2213 // This may only be used when referring to a previous vector argument.
2214 return D.getArgumentNumber() >= ArgTys.size() ||
2215 !isa<VectorType>(ArgTys[D.getArgumentNumber()]) ||
2216 VectorType::getTruncatedElementVectorType(
2217 cast<VectorType>(ArgTys[D.getArgumentNumber()])) != Ty;
2219 llvm_unreachable("unhandled");
2222 /// \brief Verify if the intrinsic has variable arguments.
2223 /// This method is intended to be called after all the fixed arguments have been
2226 /// This method returns true on error and does not print an error message.
2228 Verifier::VerifyIntrinsicIsVarArg(bool isVarArg,
2229 ArrayRef<Intrinsic::IITDescriptor> &Infos) {
2230 using namespace Intrinsic;
2232 // If there are no descriptors left, then it can't be a vararg.
2234 return isVarArg ? true : false;
2236 // There should be only one descriptor remaining at this point.
2237 if (Infos.size() != 1)
2240 // Check and verify the descriptor.
2241 IITDescriptor D = Infos.front();
2242 Infos = Infos.slice(1);
2243 if (D.Kind == IITDescriptor::VarArg)
2244 return isVarArg ? false : true;
2249 /// visitIntrinsicFunction - Allow intrinsics to be verified in different ways.
2251 void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) {
2252 Function *IF = CI.getCalledFunction();
2253 Assert1(IF->isDeclaration(), "Intrinsic functions should never be defined!",
2256 // Verify that the intrinsic prototype lines up with what the .td files
2258 FunctionType *IFTy = IF->getFunctionType();
2259 bool IsVarArg = IFTy->isVarArg();
2261 SmallVector<Intrinsic::IITDescriptor, 8> Table;
2262 getIntrinsicInfoTableEntries(ID, Table);
2263 ArrayRef<Intrinsic::IITDescriptor> TableRef = Table;
2265 SmallVector<Type *, 4> ArgTys;
2266 Assert1(!VerifyIntrinsicType(IFTy->getReturnType(), TableRef, ArgTys),
2267 "Intrinsic has incorrect return type!", IF);
2268 for (unsigned i = 0, e = IFTy->getNumParams(); i != e; ++i)
2269 Assert1(!VerifyIntrinsicType(IFTy->getParamType(i), TableRef, ArgTys),
2270 "Intrinsic has incorrect argument type!", IF);
2272 // Verify if the intrinsic call matches the vararg property.
2274 Assert1(!VerifyIntrinsicIsVarArg(IsVarArg, TableRef),
2275 "Intrinsic was not defined with variable arguments!", IF);
2277 Assert1(!VerifyIntrinsicIsVarArg(IsVarArg, TableRef),
2278 "Callsite was not defined with variable arguments!", IF);
2280 // All descriptors should be absorbed by now.
2281 Assert1(TableRef.empty(), "Intrinsic has too few arguments!", IF);
2283 // Now that we have the intrinsic ID and the actual argument types (and we
2284 // know they are legal for the intrinsic!) get the intrinsic name through the
2285 // usual means. This allows us to verify the mangling of argument types into
2287 Assert1(Intrinsic::getName(ID, ArgTys) == IF->getName(),
2288 "Intrinsic name not mangled correctly for type arguments!", IF);
2290 // If the intrinsic takes MDNode arguments, verify that they are either global
2291 // or are local to *this* function.
2292 for (unsigned i = 0, e = CI.getNumArgOperands(); i != e; ++i)
2293 if (MDNode *MD = dyn_cast<MDNode>(CI.getArgOperand(i)))
2294 visitMDNode(*MD, CI.getParent()->getParent());
2299 case Intrinsic::ctlz: // llvm.ctlz
2300 case Intrinsic::cttz: // llvm.cttz
2301 Assert1(isa<ConstantInt>(CI.getArgOperand(1)),
2302 "is_zero_undef argument of bit counting intrinsics must be a "
2303 "constant int", &CI);
2305 case Intrinsic::dbg_declare: { // llvm.dbg.declare
2306 Assert1(CI.getArgOperand(0) && isa<MDNode>(CI.getArgOperand(0)),
2307 "invalid llvm.dbg.declare intrinsic call 1", &CI);
2308 MDNode *MD = cast<MDNode>(CI.getArgOperand(0));
2309 Assert1(MD->getNumOperands() == 1,
2310 "invalid llvm.dbg.declare intrinsic call 2", &CI);
2311 if (!DisableDebugInfoVerifier)
2312 Finder.processDeclare(*Mod, cast<DbgDeclareInst>(&CI));
2314 case Intrinsic::dbg_value: { //llvm.dbg.value
2315 if (!DisableDebugInfoVerifier) {
2316 Assert1(CI.getArgOperand(0) && isa<MDNode>(CI.getArgOperand(0)),
2317 "invalid llvm.dbg.value intrinsic call 1", &CI);
2318 Finder.processValue(*Mod, cast<DbgValueInst>(&CI));
2322 case Intrinsic::memcpy:
2323 case Intrinsic::memmove:
2324 case Intrinsic::memset:
2325 Assert1(isa<ConstantInt>(CI.getArgOperand(3)),
2326 "alignment argument of memory intrinsics must be a constant int",
2328 Assert1(isa<ConstantInt>(CI.getArgOperand(4)),
2329 "isvolatile argument of memory intrinsics must be a constant int",
2332 case Intrinsic::gcroot:
2333 case Intrinsic::gcwrite:
2334 case Intrinsic::gcread:
2335 if (ID == Intrinsic::gcroot) {
2337 dyn_cast<AllocaInst>(CI.getArgOperand(0)->stripPointerCasts());
2338 Assert1(AI, "llvm.gcroot parameter #1 must be an alloca.", &CI);
2339 Assert1(isa<Constant>(CI.getArgOperand(1)),
2340 "llvm.gcroot parameter #2 must be a constant.", &CI);
2341 if (!AI->getType()->getElementType()->isPointerTy()) {
2342 Assert1(!isa<ConstantPointerNull>(CI.getArgOperand(1)),
2343 "llvm.gcroot parameter #1 must either be a pointer alloca, "
2344 "or argument #2 must be a non-null constant.", &CI);
2348 Assert1(CI.getParent()->getParent()->hasGC(),
2349 "Enclosing function does not use GC.", &CI);
2351 case Intrinsic::init_trampoline:
2352 Assert1(isa<Function>(CI.getArgOperand(1)->stripPointerCasts()),
2353 "llvm.init_trampoline parameter #2 must resolve to a function.",
2356 case Intrinsic::prefetch:
2357 Assert1(isa<ConstantInt>(CI.getArgOperand(1)) &&
2358 isa<ConstantInt>(CI.getArgOperand(2)) &&
2359 cast<ConstantInt>(CI.getArgOperand(1))->getZExtValue() < 2 &&
2360 cast<ConstantInt>(CI.getArgOperand(2))->getZExtValue() < 4,
2361 "invalid arguments to llvm.prefetch",
2364 case Intrinsic::stackprotector:
2365 Assert1(isa<AllocaInst>(CI.getArgOperand(1)->stripPointerCasts()),
2366 "llvm.stackprotector parameter #2 must resolve to an alloca.",
2369 case Intrinsic::lifetime_start:
2370 case Intrinsic::lifetime_end:
2371 case Intrinsic::invariant_start:
2372 Assert1(isa<ConstantInt>(CI.getArgOperand(0)),
2373 "size argument of memory use markers must be a constant integer",
2376 case Intrinsic::invariant_end:
2377 Assert1(isa<ConstantInt>(CI.getArgOperand(1)),
2378 "llvm.invariant.end parameter #2 must be a constant integer", &CI);
2383 void Verifier::verifyDebugInfo() {
2384 // Verify Debug Info.
2385 if (!DisableDebugInfoVerifier) {
2386 for (DebugInfoFinder::iterator I = Finder.compile_unit_begin(),
2387 E = Finder.compile_unit_end(); I != E; ++I)
2388 Assert1(DICompileUnit(*I).Verify(), "DICompileUnit does not Verify!", *I);
2389 for (DebugInfoFinder::iterator I = Finder.subprogram_begin(),
2390 E = Finder.subprogram_end(); I != E; ++I)
2391 Assert1(DISubprogram(*I).Verify(), "DISubprogram does not Verify!", *I);
2392 for (DebugInfoFinder::iterator I = Finder.global_variable_begin(),
2393 E = Finder.global_variable_end(); I != E; ++I)
2394 Assert1(DIGlobalVariable(*I).Verify(),
2395 "DIGlobalVariable does not Verify!", *I);
2396 for (DebugInfoFinder::iterator I = Finder.type_begin(),
2397 E = Finder.type_end(); I != E; ++I)
2398 Assert1(DIType(*I).Verify(), "DIType does not Verify!", *I);
2399 for (DebugInfoFinder::iterator I = Finder.scope_begin(),
2400 E = Finder.scope_end(); I != E; ++I)
2401 Assert1(DIScope(*I).Verify(), "DIScope does not Verify!", *I);
2405 //===----------------------------------------------------------------------===//
2406 // Implement the public interfaces to this file...
2407 //===----------------------------------------------------------------------===//
2409 FunctionPass *llvm::createVerifierPass(VerifierFailureAction action) {
2410 return new Verifier(action);
2414 /// verifyFunction - Check a function for errors, printing messages on stderr.
2415 /// Return true if the function is corrupt.
2417 bool llvm::verifyFunction(const Function &f, VerifierFailureAction action) {
2418 Function &F = const_cast<Function&>(f);
2419 assert(!F.isDeclaration() && "Cannot verify external functions");
2421 FunctionPassManager FPM(F.getParent());
2422 Verifier *V = new Verifier(action);
2424 FPM.doInitialization();
2429 /// verifyModule - Check a module for errors, printing messages on stderr.
2430 /// Return true if the module is corrupt.
2432 bool llvm::verifyModule(const Module &M, VerifierFailureAction action,
2433 std::string *ErrorInfo) {
2435 Verifier *V = new Verifier(action);
2437 PM.run(const_cast<Module&>(M));
2439 if (ErrorInfo && V->Broken)
2440 *ErrorInfo = V->MessagesStr.str();