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/CodeGen/ValueTypes.h"
57 #include "llvm/IR/CallingConv.h"
58 #include "llvm/IR/Constants.h"
59 #include "llvm/IR/DerivedTypes.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/InstVisitor.h"
66 #include "llvm/Pass.h"
67 #include "llvm/PassManager.h"
68 #include "llvm/Support/CFG.h"
69 #include "llvm/Support/CallSite.h"
70 #include "llvm/Support/ConstantRange.h"
71 #include "llvm/Support/Debug.h"
72 #include "llvm/Support/ErrorHandling.h"
73 #include "llvm/Support/raw_ostream.h"
78 namespace { // Anonymous namespace for class
79 struct PreVerifier : public FunctionPass {
80 static char ID; // Pass ID, replacement for typeid
82 PreVerifier() : FunctionPass(ID) {
83 initializePreVerifierPass(*PassRegistry::getPassRegistry());
86 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
90 // Check that the prerequisites for successful DominatorTree construction
92 bool runOnFunction(Function &F) {
95 for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I) {
96 if (I->empty() || !I->back().isTerminator()) {
97 dbgs() << "Basic Block in function '" << F.getName()
98 << "' does not have terminator!\n";
99 WriteAsOperand(dbgs(), I, true);
106 report_fatal_error("Broken module, no Basic Block terminator!");
113 char PreVerifier::ID = 0;
114 INITIALIZE_PASS(PreVerifier, "preverify", "Preliminary module verification",
116 static char &PreVerifyID = PreVerifier::ID;
119 struct Verifier : public FunctionPass, public InstVisitor<Verifier> {
120 static char ID; // Pass ID, replacement for typeid
121 bool Broken; // Is this module found to be broken?
122 VerifierFailureAction action;
123 // What to do if verification fails.
124 Module *Mod; // Module we are verifying right now
125 LLVMContext *Context; // Context within which we are verifying
126 DominatorTree *DT; // Dominator Tree, caution can be null!
128 std::string Messages;
129 raw_string_ostream MessagesStr;
131 /// InstInThisBlock - when verifying a basic block, keep track of all of the
132 /// instructions we have seen so far. This allows us to do efficient
133 /// dominance checks for the case when an instruction has an operand that is
134 /// an instruction in the same block.
135 SmallPtrSet<Instruction*, 16> InstsInThisBlock;
137 /// MDNodes - keep track of the metadata nodes that have been checked
139 SmallPtrSet<MDNode *, 32> MDNodes;
141 /// PersonalityFn - The personality function referenced by the
142 /// LandingPadInsts. All LandingPadInsts within the same function must use
143 /// the same personality function.
144 const Value *PersonalityFn;
147 : FunctionPass(ID), Broken(false),
148 action(AbortProcessAction), Mod(0), Context(0), DT(0),
149 MessagesStr(Messages), PersonalityFn(0) {
150 initializeVerifierPass(*PassRegistry::getPassRegistry());
152 explicit Verifier(VerifierFailureAction ctn)
153 : FunctionPass(ID), Broken(false), action(ctn), Mod(0),
154 Context(0), DT(0), MessagesStr(Messages), PersonalityFn(0) {
155 initializeVerifierPass(*PassRegistry::getPassRegistry());
158 bool doInitialization(Module &M) {
160 Context = &M.getContext();
162 // We must abort before returning back to the pass manager, or else the
163 // pass manager may try to run other passes on the broken module.
164 return abortIfBroken();
167 bool runOnFunction(Function &F) {
168 // Get dominator information if we are being run by PassManager
169 DT = &getAnalysis<DominatorTree>();
172 if (!Context) Context = &F.getContext();
175 InstsInThisBlock.clear();
178 // We must abort before returning back to the pass manager, or else the
179 // pass manager may try to run other passes on the broken module.
180 return abortIfBroken();
183 bool doFinalization(Module &M) {
184 // Scan through, checking all of the external function's linkage now...
185 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
186 visitGlobalValue(*I);
188 // Check to make sure function prototypes are okay.
189 if (I->isDeclaration()) visitFunction(*I);
192 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
194 visitGlobalVariable(*I);
196 for (Module::alias_iterator I = M.alias_begin(), E = M.alias_end();
198 visitGlobalAlias(*I);
200 for (Module::named_metadata_iterator I = M.named_metadata_begin(),
201 E = M.named_metadata_end(); I != E; ++I)
202 visitNamedMDNode(*I);
204 // If the module is broken, abort at this time.
205 return abortIfBroken();
208 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
209 AU.setPreservesAll();
210 AU.addRequiredID(PreVerifyID);
211 AU.addRequired<DominatorTree>();
214 /// abortIfBroken - If the module is broken and we are supposed to abort on
215 /// this condition, do so.
217 bool abortIfBroken() {
218 if (!Broken) return false;
219 MessagesStr << "Broken module found, ";
221 case AbortProcessAction:
222 MessagesStr << "compilation aborted!\n";
223 dbgs() << MessagesStr.str();
224 // Client should choose different reaction if abort is not desired
226 case PrintMessageAction:
227 MessagesStr << "verification continues.\n";
228 dbgs() << MessagesStr.str();
230 case ReturnStatusAction:
231 MessagesStr << "compilation terminated.\n";
234 llvm_unreachable("Invalid action");
238 // Verification methods...
239 void visitGlobalValue(GlobalValue &GV);
240 void visitGlobalVariable(GlobalVariable &GV);
241 void visitGlobalAlias(GlobalAlias &GA);
242 void visitNamedMDNode(NamedMDNode &NMD);
243 void visitMDNode(MDNode &MD, Function *F);
244 void visitFunction(Function &F);
245 void visitBasicBlock(BasicBlock &BB);
246 using InstVisitor<Verifier>::visit;
248 void visit(Instruction &I);
250 void visitTruncInst(TruncInst &I);
251 void visitZExtInst(ZExtInst &I);
252 void visitSExtInst(SExtInst &I);
253 void visitFPTruncInst(FPTruncInst &I);
254 void visitFPExtInst(FPExtInst &I);
255 void visitFPToUIInst(FPToUIInst &I);
256 void visitFPToSIInst(FPToSIInst &I);
257 void visitUIToFPInst(UIToFPInst &I);
258 void visitSIToFPInst(SIToFPInst &I);
259 void visitIntToPtrInst(IntToPtrInst &I);
260 void visitPtrToIntInst(PtrToIntInst &I);
261 void visitBitCastInst(BitCastInst &I);
262 void visitPHINode(PHINode &PN);
263 void visitBinaryOperator(BinaryOperator &B);
264 void visitICmpInst(ICmpInst &IC);
265 void visitFCmpInst(FCmpInst &FC);
266 void visitExtractElementInst(ExtractElementInst &EI);
267 void visitInsertElementInst(InsertElementInst &EI);
268 void visitShuffleVectorInst(ShuffleVectorInst &EI);
269 void visitVAArgInst(VAArgInst &VAA) { visitInstruction(VAA); }
270 void visitCallInst(CallInst &CI);
271 void visitInvokeInst(InvokeInst &II);
272 void visitGetElementPtrInst(GetElementPtrInst &GEP);
273 void visitLoadInst(LoadInst &LI);
274 void visitStoreInst(StoreInst &SI);
275 void verifyDominatesUse(Instruction &I, unsigned i);
276 void visitInstruction(Instruction &I);
277 void visitTerminatorInst(TerminatorInst &I);
278 void visitBranchInst(BranchInst &BI);
279 void visitReturnInst(ReturnInst &RI);
280 void visitSwitchInst(SwitchInst &SI);
281 void visitIndirectBrInst(IndirectBrInst &BI);
282 void visitSelectInst(SelectInst &SI);
283 void visitUserOp1(Instruction &I);
284 void visitUserOp2(Instruction &I) { visitUserOp1(I); }
285 void visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI);
286 void visitAtomicCmpXchgInst(AtomicCmpXchgInst &CXI);
287 void visitAtomicRMWInst(AtomicRMWInst &RMWI);
288 void visitFenceInst(FenceInst &FI);
289 void visitAllocaInst(AllocaInst &AI);
290 void visitExtractValueInst(ExtractValueInst &EVI);
291 void visitInsertValueInst(InsertValueInst &IVI);
292 void visitLandingPadInst(LandingPadInst &LPI);
294 void VerifyCallSite(CallSite CS);
295 bool PerformTypeCheck(Intrinsic::ID ID, Function *F, Type *Ty,
296 int VT, unsigned ArgNo, std::string &Suffix);
297 bool VerifyIntrinsicType(Type *Ty,
298 ArrayRef<Intrinsic::IITDescriptor> &Infos,
299 SmallVectorImpl<Type*> &ArgTys);
300 void VerifyParameterAttrs(Attribute Attrs, Type *Ty,
301 bool isReturnValue, const Value *V);
302 void VerifyFunctionAttrs(FunctionType *FT, const AttributeSet &Attrs,
305 void WriteValue(const Value *V) {
307 if (isa<Instruction>(V)) {
308 MessagesStr << *V << '\n';
310 WriteAsOperand(MessagesStr, V, true, Mod);
315 void WriteType(Type *T) {
317 MessagesStr << ' ' << *T;
321 // CheckFailed - A check failed, so print out the condition and the message
322 // that failed. This provides a nice place to put a breakpoint if you want
323 // to see why something is not correct.
324 void CheckFailed(const Twine &Message,
325 const Value *V1 = 0, const Value *V2 = 0,
326 const Value *V3 = 0, const Value *V4 = 0) {
327 MessagesStr << Message.str() << "\n";
335 void CheckFailed(const Twine &Message, const Value *V1,
336 Type *T2, const Value *V3 = 0) {
337 MessagesStr << Message.str() << "\n";
344 void CheckFailed(const Twine &Message, Type *T1,
345 Type *T2 = 0, Type *T3 = 0) {
346 MessagesStr << Message.str() << "\n";
353 } // End anonymous namespace
355 char Verifier::ID = 0;
356 INITIALIZE_PASS_BEGIN(Verifier, "verify", "Module Verifier", false, false)
357 INITIALIZE_PASS_DEPENDENCY(PreVerifier)
358 INITIALIZE_PASS_DEPENDENCY(DominatorTree)
359 INITIALIZE_PASS_END(Verifier, "verify", "Module Verifier", false, false)
361 // Assert - We know that cond should be true, if not print an error message.
362 #define Assert(C, M) \
363 do { if (!(C)) { CheckFailed(M); return; } } while (0)
364 #define Assert1(C, M, V1) \
365 do { if (!(C)) { CheckFailed(M, V1); return; } } while (0)
366 #define Assert2(C, M, V1, V2) \
367 do { if (!(C)) { CheckFailed(M, V1, V2); return; } } while (0)
368 #define Assert3(C, M, V1, V2, V3) \
369 do { if (!(C)) { CheckFailed(M, V1, V2, V3); return; } } while (0)
370 #define Assert4(C, M, V1, V2, V3, V4) \
371 do { if (!(C)) { CheckFailed(M, V1, V2, V3, V4); return; } } while (0)
373 void Verifier::visit(Instruction &I) {
374 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
375 Assert1(I.getOperand(i) != 0, "Operand is null", &I);
376 InstVisitor<Verifier>::visit(I);
380 void Verifier::visitGlobalValue(GlobalValue &GV) {
381 Assert1(!GV.isDeclaration() ||
382 GV.isMaterializable() ||
383 GV.hasExternalLinkage() ||
384 GV.hasDLLImportLinkage() ||
385 GV.hasExternalWeakLinkage() ||
386 (isa<GlobalAlias>(GV) &&
387 (GV.hasLocalLinkage() || GV.hasWeakLinkage())),
388 "Global is external, but doesn't have external or dllimport or weak linkage!",
391 Assert1(!GV.hasDLLImportLinkage() || GV.isDeclaration(),
392 "Global is marked as dllimport, but not external", &GV);
394 Assert1(!GV.hasAppendingLinkage() || isa<GlobalVariable>(GV),
395 "Only global variables can have appending linkage!", &GV);
397 if (GV.hasAppendingLinkage()) {
398 GlobalVariable *GVar = dyn_cast<GlobalVariable>(&GV);
399 Assert1(GVar && GVar->getType()->getElementType()->isArrayTy(),
400 "Only global arrays can have appending linkage!", GVar);
403 Assert1(!GV.hasLinkOnceODRAutoHideLinkage() || GV.hasDefaultVisibility(),
404 "linkonce_odr_auto_hide can only have default visibility!",
408 void Verifier::visitGlobalVariable(GlobalVariable &GV) {
409 if (GV.hasInitializer()) {
410 Assert1(GV.getInitializer()->getType() == GV.getType()->getElementType(),
411 "Global variable initializer type does not match global "
412 "variable type!", &GV);
414 // If the global has common linkage, it must have a zero initializer and
415 // cannot be constant.
416 if (GV.hasCommonLinkage()) {
417 Assert1(GV.getInitializer()->isNullValue(),
418 "'common' global must have a zero initializer!", &GV);
419 Assert1(!GV.isConstant(), "'common' global may not be marked constant!",
423 Assert1(GV.hasExternalLinkage() || GV.hasDLLImportLinkage() ||
424 GV.hasExternalWeakLinkage(),
425 "invalid linkage type for global declaration", &GV);
428 if (GV.hasName() && (GV.getName() == "llvm.global_ctors" ||
429 GV.getName() == "llvm.global_dtors")) {
430 Assert1(!GV.hasInitializer() || GV.hasAppendingLinkage(),
431 "invalid linkage for intrinsic global variable", &GV);
432 // Don't worry about emitting an error for it not being an array,
433 // visitGlobalValue will complain on appending non-array.
434 if (ArrayType *ATy = dyn_cast<ArrayType>(GV.getType())) {
435 StructType *STy = dyn_cast<StructType>(ATy->getElementType());
436 PointerType *FuncPtrTy =
437 FunctionType::get(Type::getVoidTy(*Context), false)->getPointerTo();
438 Assert1(STy && STy->getNumElements() == 2 &&
439 STy->getTypeAtIndex(0u)->isIntegerTy(32) &&
440 STy->getTypeAtIndex(1) == FuncPtrTy,
441 "wrong type for intrinsic global variable", &GV);
445 visitGlobalValue(GV);
448 void Verifier::visitGlobalAlias(GlobalAlias &GA) {
449 Assert1(!GA.getName().empty(),
450 "Alias name cannot be empty!", &GA);
451 Assert1(GA.hasExternalLinkage() || GA.hasLocalLinkage() ||
453 "Alias should have external or external weak linkage!", &GA);
454 Assert1(GA.getAliasee(),
455 "Aliasee cannot be NULL!", &GA);
456 Assert1(GA.getType() == GA.getAliasee()->getType(),
457 "Alias and aliasee types should match!", &GA);
458 Assert1(!GA.hasUnnamedAddr(), "Alias cannot have unnamed_addr!", &GA);
460 if (!isa<GlobalValue>(GA.getAliasee())) {
461 const ConstantExpr *CE = dyn_cast<ConstantExpr>(GA.getAliasee());
463 (CE->getOpcode() == Instruction::BitCast ||
464 CE->getOpcode() == Instruction::GetElementPtr) &&
465 isa<GlobalValue>(CE->getOperand(0)),
466 "Aliasee should be either GlobalValue or bitcast of GlobalValue",
470 const GlobalValue* Aliasee = GA.resolveAliasedGlobal(/*stopOnWeak*/ false);
472 "Aliasing chain should end with function or global variable", &GA);
474 visitGlobalValue(GA);
477 void Verifier::visitNamedMDNode(NamedMDNode &NMD) {
478 for (unsigned i = 0, e = NMD.getNumOperands(); i != e; ++i) {
479 MDNode *MD = NMD.getOperand(i);
483 Assert1(!MD->isFunctionLocal(),
484 "Named metadata operand cannot be function local!", MD);
489 void Verifier::visitMDNode(MDNode &MD, Function *F) {
490 // Only visit each node once. Metadata can be mutually recursive, so this
491 // avoids infinite recursion here, as well as being an optimization.
492 if (!MDNodes.insert(&MD))
495 for (unsigned i = 0, e = MD.getNumOperands(); i != e; ++i) {
496 Value *Op = MD.getOperand(i);
499 if (isa<Constant>(Op) || isa<MDString>(Op))
501 if (MDNode *N = dyn_cast<MDNode>(Op)) {
502 Assert2(MD.isFunctionLocal() || !N->isFunctionLocal(),
503 "Global metadata operand cannot be function local!", &MD, N);
507 Assert2(MD.isFunctionLocal(), "Invalid operand for global metadata!", &MD, Op);
509 // If this was an instruction, bb, or argument, verify that it is in the
510 // function that we expect.
511 Function *ActualF = 0;
512 if (Instruction *I = dyn_cast<Instruction>(Op))
513 ActualF = I->getParent()->getParent();
514 else if (BasicBlock *BB = dyn_cast<BasicBlock>(Op))
515 ActualF = BB->getParent();
516 else if (Argument *A = dyn_cast<Argument>(Op))
517 ActualF = A->getParent();
518 assert(ActualF && "Unimplemented function local metadata case!");
520 Assert2(ActualF == F, "function-local metadata used in wrong function",
525 // VerifyParameterAttrs - Check the given attributes for an argument or return
526 // value of the specified type. The value V is printed in error messages.
527 void Verifier::VerifyParameterAttrs(Attribute Attrs, Type *Ty,
528 bool isReturnValue, const Value *V) {
529 if (!Attrs.hasAttributes())
532 Assert1(!Attrs.hasAttribute(Attribute::NoReturn) &&
533 !Attrs.hasAttribute(Attribute::NoUnwind) &&
534 !Attrs.hasAttribute(Attribute::ReadNone) &&
535 !Attrs.hasAttribute(Attribute::ReadOnly) &&
536 !Attrs.hasAttribute(Attribute::NoInline) &&
537 !Attrs.hasAttribute(Attribute::AlwaysInline) &&
538 !Attrs.hasAttribute(Attribute::OptimizeForSize) &&
539 !Attrs.hasAttribute(Attribute::StackProtect) &&
540 !Attrs.hasAttribute(Attribute::StackProtectReq) &&
541 !Attrs.hasAttribute(Attribute::NoRedZone) &&
542 !Attrs.hasAttribute(Attribute::NoImplicitFloat) &&
543 !Attrs.hasAttribute(Attribute::Naked) &&
544 !Attrs.hasAttribute(Attribute::InlineHint) &&
545 !Attrs.hasAttribute(Attribute::StackAlignment) &&
546 !Attrs.hasAttribute(Attribute::UWTable) &&
547 !Attrs.hasAttribute(Attribute::NonLazyBind) &&
548 !Attrs.hasAttribute(Attribute::ReturnsTwice) &&
549 !Attrs.hasAttribute(Attribute::AddressSafety) &&
550 !Attrs.hasAttribute(Attribute::MinSize),
551 "Some attributes in '" + Attrs.getAsString() +
552 "' only apply to functions!", V);
555 Assert1(!Attrs.hasAttribute(Attribute::ByVal) &&
556 !Attrs.hasAttribute(Attribute::Nest) &&
557 !Attrs.hasAttribute(Attribute::StructRet) &&
558 !Attrs.hasAttribute(Attribute::NoCapture),
559 "Attribute 'byval', 'nest', 'sret', and 'nocapture' "
560 "do not apply to return values!", V);
562 // Check for mutually incompatible attributes.
563 Assert1(!((Attrs.hasAttribute(Attribute::ByVal) &&
564 Attrs.hasAttribute(Attribute::Nest)) ||
565 (Attrs.hasAttribute(Attribute::ByVal) &&
566 Attrs.hasAttribute(Attribute::StructRet)) ||
567 (Attrs.hasAttribute(Attribute::Nest) &&
568 Attrs.hasAttribute(Attribute::StructRet))), "Attributes "
569 "'byval, nest, and sret' are incompatible!", V);
571 Assert1(!((Attrs.hasAttribute(Attribute::ByVal) &&
572 Attrs.hasAttribute(Attribute::Nest)) ||
573 (Attrs.hasAttribute(Attribute::ByVal) &&
574 Attrs.hasAttribute(Attribute::InReg)) ||
575 (Attrs.hasAttribute(Attribute::Nest) &&
576 Attrs.hasAttribute(Attribute::InReg))), "Attributes "
577 "'byval, nest, and inreg' are incompatible!", V);
579 Assert1(!(Attrs.hasAttribute(Attribute::ZExt) &&
580 Attrs.hasAttribute(Attribute::SExt)), "Attributes "
581 "'zeroext and signext' are incompatible!", V);
583 Assert1(!(Attrs.hasAttribute(Attribute::ReadNone) &&
584 Attrs.hasAttribute(Attribute::ReadOnly)), "Attributes "
585 "'readnone and readonly' are incompatible!", V);
587 Assert1(!(Attrs.hasAttribute(Attribute::NoInline) &&
588 Attrs.hasAttribute(Attribute::AlwaysInline)), "Attributes "
589 "'noinline and alwaysinline' are incompatible!", V);
591 Assert1(!AttrBuilder(Attrs).
592 hasAttributes(Attribute::typeIncompatible(Ty)),
593 "Wrong types for attribute: " +
594 Attribute::typeIncompatible(Ty).getAsString(), V);
596 if (PointerType *PTy = dyn_cast<PointerType>(Ty))
597 Assert1(!Attrs.hasAttribute(Attribute::ByVal) ||
598 PTy->getElementType()->isSized(),
599 "Attribute 'byval' does not support unsized types!", V);
601 Assert1(!Attrs.hasAttribute(Attribute::ByVal),
602 "Attribute 'byval' only applies to parameters with pointer type!",
606 // VerifyFunctionAttrs - Check parameter attributes against a function type.
607 // The value V is printed in error messages.
608 void Verifier::VerifyFunctionAttrs(FunctionType *FT,
609 const AttributeSet &Attrs,
614 bool SawNest = false;
616 for (unsigned i = 0, e = Attrs.getNumSlots(); i != e; ++i) {
617 const AttributeWithIndex &Attr = Attrs.getSlot(i);
621 Ty = FT->getReturnType();
622 else if (Attr.Index-1 < FT->getNumParams())
623 Ty = FT->getParamType(Attr.Index-1);
625 break; // VarArgs attributes, verified elsewhere.
627 VerifyParameterAttrs(Attr.Attrs, Ty, Attr.Index == 0, V);
629 if (Attr.Attrs.hasAttribute(Attribute::Nest)) {
630 Assert1(!SawNest, "More than one parameter has attribute nest!", V);
634 if (Attr.Attrs.hasAttribute(Attribute::StructRet))
635 Assert1(Attr.Index == 1, "Attribute sret is not on first parameter!", V);
638 Attribute FAttrs = Attrs.getFnAttributes();
639 AttrBuilder NotFn(FAttrs);
640 NotFn.removeFunctionOnlyAttrs();
641 Assert1(!NotFn.hasAttributes(), "Attribute '" +
642 Attribute::get(V->getContext(), NotFn).getAsString() +
643 "' do not apply to the function!", V);
645 // Check for mutually incompatible attributes.
646 Assert1(!((FAttrs.hasAttribute(Attribute::ByVal) &&
647 FAttrs.hasAttribute(Attribute::Nest)) ||
648 (FAttrs.hasAttribute(Attribute::ByVal) &&
649 FAttrs.hasAttribute(Attribute::StructRet)) ||
650 (FAttrs.hasAttribute(Attribute::Nest) &&
651 FAttrs.hasAttribute(Attribute::StructRet))), "Attributes "
652 "'byval, nest, and sret' are incompatible!", V);
654 Assert1(!((FAttrs.hasAttribute(Attribute::ByVal) &&
655 FAttrs.hasAttribute(Attribute::Nest)) ||
656 (FAttrs.hasAttribute(Attribute::ByVal) &&
657 FAttrs.hasAttribute(Attribute::InReg)) ||
658 (FAttrs.hasAttribute(Attribute::Nest) &&
659 FAttrs.hasAttribute(Attribute::InReg))), "Attributes "
660 "'byval, nest, and inreg' are incompatible!", V);
662 Assert1(!(FAttrs.hasAttribute(Attribute::ZExt) &&
663 FAttrs.hasAttribute(Attribute::SExt)), "Attributes "
664 "'zeroext and signext' are incompatible!", V);
666 Assert1(!(FAttrs.hasAttribute(Attribute::ReadNone) &&
667 FAttrs.hasAttribute(Attribute::ReadOnly)), "Attributes "
668 "'readnone and readonly' are incompatible!", V);
670 Assert1(!(FAttrs.hasAttribute(Attribute::NoInline) &&
671 FAttrs.hasAttribute(Attribute::AlwaysInline)), "Attributes "
672 "'noinline and alwaysinline' are incompatible!", V);
675 static bool VerifyAttributeCount(const AttributeSet &Attrs, unsigned Params) {
679 unsigned LastSlot = Attrs.getNumSlots() - 1;
680 unsigned LastIndex = Attrs.getSlot(LastSlot).Index;
681 if (LastIndex <= Params
682 || (LastIndex == (unsigned)~0
683 && (LastSlot == 0 || Attrs.getSlot(LastSlot - 1).Index <= Params)))
689 // visitFunction - Verify that a function is ok.
691 void Verifier::visitFunction(Function &F) {
692 // Check function arguments.
693 FunctionType *FT = F.getFunctionType();
694 unsigned NumArgs = F.arg_size();
696 Assert1(Context == &F.getContext(),
697 "Function context does not match Module context!", &F);
699 Assert1(!F.hasCommonLinkage(), "Functions may not have common linkage", &F);
700 Assert2(FT->getNumParams() == NumArgs,
701 "# formal arguments must match # of arguments for function type!",
703 Assert1(F.getReturnType()->isFirstClassType() ||
704 F.getReturnType()->isVoidTy() ||
705 F.getReturnType()->isStructTy(),
706 "Functions cannot return aggregate values!", &F);
708 Assert1(!F.hasStructRetAttr() || F.getReturnType()->isVoidTy(),
709 "Invalid struct return type!", &F);
711 const AttributeSet &Attrs = F.getAttributes();
713 Assert1(VerifyAttributeCount(Attrs, FT->getNumParams()),
714 "Attribute after last parameter!", &F);
716 // Check function attributes.
717 VerifyFunctionAttrs(FT, Attrs, &F);
719 // Check that this function meets the restrictions on this calling convention.
720 switch (F.getCallingConv()) {
725 case CallingConv::Fast:
726 case CallingConv::Cold:
727 case CallingConv::X86_FastCall:
728 case CallingConv::X86_ThisCall:
729 case CallingConv::Intel_OCL_BI:
730 case CallingConv::PTX_Kernel:
731 case CallingConv::PTX_Device:
732 Assert1(!F.isVarArg(),
733 "Varargs functions must have C calling conventions!", &F);
737 bool isLLVMdotName = F.getName().size() >= 5 &&
738 F.getName().substr(0, 5) == "llvm.";
740 // Check that the argument values match the function type for this function...
742 for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end();
744 Assert2(I->getType() == FT->getParamType(i),
745 "Argument value does not match function argument type!",
746 I, FT->getParamType(i));
747 Assert1(I->getType()->isFirstClassType(),
748 "Function arguments must have first-class types!", I);
750 Assert2(!I->getType()->isMetadataTy(),
751 "Function takes metadata but isn't an intrinsic", I, &F);
754 if (F.isMaterializable()) {
755 // Function has a body somewhere we can't see.
756 } else if (F.isDeclaration()) {
757 Assert1(F.hasExternalLinkage() || F.hasDLLImportLinkage() ||
758 F.hasExternalWeakLinkage(),
759 "invalid linkage type for function declaration", &F);
761 // Verify that this function (which has a body) is not named "llvm.*". It
762 // is not legal to define intrinsics.
763 Assert1(!isLLVMdotName, "llvm intrinsics cannot be defined!", &F);
765 // Check the entry node
766 BasicBlock *Entry = &F.getEntryBlock();
767 Assert1(pred_begin(Entry) == pred_end(Entry),
768 "Entry block to function must not have predecessors!", Entry);
770 // The address of the entry block cannot be taken, unless it is dead.
771 if (Entry->hasAddressTaken()) {
772 Assert1(!BlockAddress::get(Entry)->isConstantUsed(),
773 "blockaddress may not be used with the entry block!", Entry);
777 // If this function is actually an intrinsic, verify that it is only used in
778 // direct call/invokes, never having its "address taken".
779 if (F.getIntrinsicID()) {
781 if (F.hasAddressTaken(&U))
782 Assert1(0, "Invalid user of intrinsic instruction!", U);
786 // verifyBasicBlock - Verify that a basic block is well formed...
788 void Verifier::visitBasicBlock(BasicBlock &BB) {
789 InstsInThisBlock.clear();
791 // Ensure that basic blocks have terminators!
792 Assert1(BB.getTerminator(), "Basic Block does not have terminator!", &BB);
794 // Check constraints that this basic block imposes on all of the PHI nodes in
796 if (isa<PHINode>(BB.front())) {
797 SmallVector<BasicBlock*, 8> Preds(pred_begin(&BB), pred_end(&BB));
798 SmallVector<std::pair<BasicBlock*, Value*>, 8> Values;
799 std::sort(Preds.begin(), Preds.end());
801 for (BasicBlock::iterator I = BB.begin(); (PN = dyn_cast<PHINode>(I));++I) {
802 // Ensure that PHI nodes have at least one entry!
803 Assert1(PN->getNumIncomingValues() != 0,
804 "PHI nodes must have at least one entry. If the block is dead, "
805 "the PHI should be removed!", PN);
806 Assert1(PN->getNumIncomingValues() == Preds.size(),
807 "PHINode should have one entry for each predecessor of its "
808 "parent basic block!", PN);
810 // Get and sort all incoming values in the PHI node...
812 Values.reserve(PN->getNumIncomingValues());
813 for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i)
814 Values.push_back(std::make_pair(PN->getIncomingBlock(i),
815 PN->getIncomingValue(i)));
816 std::sort(Values.begin(), Values.end());
818 for (unsigned i = 0, e = Values.size(); i != e; ++i) {
819 // Check to make sure that if there is more than one entry for a
820 // particular basic block in this PHI node, that the incoming values are
823 Assert4(i == 0 || Values[i].first != Values[i-1].first ||
824 Values[i].second == Values[i-1].second,
825 "PHI node has multiple entries for the same basic block with "
826 "different incoming values!", PN, Values[i].first,
827 Values[i].second, Values[i-1].second);
829 // Check to make sure that the predecessors and PHI node entries are
831 Assert3(Values[i].first == Preds[i],
832 "PHI node entries do not match predecessors!", PN,
833 Values[i].first, Preds[i]);
839 void Verifier::visitTerminatorInst(TerminatorInst &I) {
840 // Ensure that terminators only exist at the end of the basic block.
841 Assert1(&I == I.getParent()->getTerminator(),
842 "Terminator found in the middle of a basic block!", I.getParent());
846 void Verifier::visitBranchInst(BranchInst &BI) {
847 if (BI.isConditional()) {
848 Assert2(BI.getCondition()->getType()->isIntegerTy(1),
849 "Branch condition is not 'i1' type!", &BI, BI.getCondition());
851 visitTerminatorInst(BI);
854 void Verifier::visitReturnInst(ReturnInst &RI) {
855 Function *F = RI.getParent()->getParent();
856 unsigned N = RI.getNumOperands();
857 if (F->getReturnType()->isVoidTy())
859 "Found return instr that returns non-void in Function of void "
860 "return type!", &RI, F->getReturnType());
862 Assert2(N == 1 && F->getReturnType() == RI.getOperand(0)->getType(),
863 "Function return type does not match operand "
864 "type of return inst!", &RI, F->getReturnType());
866 // Check to make sure that the return value has necessary properties for
868 visitTerminatorInst(RI);
871 void Verifier::visitSwitchInst(SwitchInst &SI) {
872 // Check to make sure that all of the constants in the switch instruction
873 // have the same type as the switched-on value.
874 Type *SwitchTy = SI.getCondition()->getType();
875 IntegerType *IntTy = cast<IntegerType>(SwitchTy);
876 IntegersSubsetToBB Mapping;
877 std::map<IntegersSubset::Range, unsigned> RangeSetMap;
878 for (SwitchInst::CaseIt i = SI.case_begin(), e = SI.case_end(); i != e; ++i) {
879 IntegersSubset CaseRanges = i.getCaseValueEx();
880 for (unsigned ri = 0, rie = CaseRanges.getNumItems(); ri < rie; ++ri) {
881 IntegersSubset::Range r = CaseRanges.getItem(ri);
882 Assert1(((const APInt&)r.getLow()).getBitWidth() == IntTy->getBitWidth(),
883 "Switch constants must all be same type as switch value!", &SI);
884 Assert1(((const APInt&)r.getHigh()).getBitWidth() == IntTy->getBitWidth(),
885 "Switch constants must all be same type as switch value!", &SI);
887 RangeSetMap[r] = i.getCaseIndex();
891 IntegersSubsetToBB::RangeIterator errItem;
892 if (!Mapping.verify(errItem)) {
893 unsigned CaseIndex = RangeSetMap[errItem->first];
894 SwitchInst::CaseIt i(&SI, CaseIndex);
895 Assert2(false, "Duplicate integer as switch case", &SI, i.getCaseValueEx());
898 visitTerminatorInst(SI);
901 void Verifier::visitIndirectBrInst(IndirectBrInst &BI) {
902 Assert1(BI.getAddress()->getType()->isPointerTy(),
903 "Indirectbr operand must have pointer type!", &BI);
904 for (unsigned i = 0, e = BI.getNumDestinations(); i != e; ++i)
905 Assert1(BI.getDestination(i)->getType()->isLabelTy(),
906 "Indirectbr destinations must all have pointer type!", &BI);
908 visitTerminatorInst(BI);
911 void Verifier::visitSelectInst(SelectInst &SI) {
912 Assert1(!SelectInst::areInvalidOperands(SI.getOperand(0), SI.getOperand(1),
914 "Invalid operands for select instruction!", &SI);
916 Assert1(SI.getTrueValue()->getType() == SI.getType(),
917 "Select values must have same type as select instruction!", &SI);
918 visitInstruction(SI);
921 /// visitUserOp1 - User defined operators shouldn't live beyond the lifetime of
922 /// a pass, if any exist, it's an error.
924 void Verifier::visitUserOp1(Instruction &I) {
925 Assert1(0, "User-defined operators should not live outside of a pass!", &I);
928 void Verifier::visitTruncInst(TruncInst &I) {
929 // Get the source and destination types
930 Type *SrcTy = I.getOperand(0)->getType();
931 Type *DestTy = I.getType();
933 // Get the size of the types in bits, we'll need this later
934 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
935 unsigned DestBitSize = DestTy->getScalarSizeInBits();
937 Assert1(SrcTy->isIntOrIntVectorTy(), "Trunc only operates on integer", &I);
938 Assert1(DestTy->isIntOrIntVectorTy(), "Trunc only produces integer", &I);
939 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
940 "trunc source and destination must both be a vector or neither", &I);
941 Assert1(SrcBitSize > DestBitSize,"DestTy too big for Trunc", &I);
946 void Verifier::visitZExtInst(ZExtInst &I) {
947 // Get the source and destination types
948 Type *SrcTy = I.getOperand(0)->getType();
949 Type *DestTy = I.getType();
951 // Get the size of the types in bits, we'll need this later
952 Assert1(SrcTy->isIntOrIntVectorTy(), "ZExt only operates on integer", &I);
953 Assert1(DestTy->isIntOrIntVectorTy(), "ZExt only produces an integer", &I);
954 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
955 "zext source and destination must both be a vector or neither", &I);
956 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
957 unsigned DestBitSize = DestTy->getScalarSizeInBits();
959 Assert1(SrcBitSize < DestBitSize,"Type too small for ZExt", &I);
964 void Verifier::visitSExtInst(SExtInst &I) {
965 // Get the source and destination types
966 Type *SrcTy = I.getOperand(0)->getType();
967 Type *DestTy = I.getType();
969 // Get the size of the types in bits, we'll need this later
970 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
971 unsigned DestBitSize = DestTy->getScalarSizeInBits();
973 Assert1(SrcTy->isIntOrIntVectorTy(), "SExt only operates on integer", &I);
974 Assert1(DestTy->isIntOrIntVectorTy(), "SExt only produces an integer", &I);
975 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
976 "sext source and destination must both be a vector or neither", &I);
977 Assert1(SrcBitSize < DestBitSize,"Type too small for SExt", &I);
982 void Verifier::visitFPTruncInst(FPTruncInst &I) {
983 // Get the source and destination types
984 Type *SrcTy = I.getOperand(0)->getType();
985 Type *DestTy = I.getType();
986 // Get the size of the types in bits, we'll need this later
987 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
988 unsigned DestBitSize = DestTy->getScalarSizeInBits();
990 Assert1(SrcTy->isFPOrFPVectorTy(),"FPTrunc only operates on FP", &I);
991 Assert1(DestTy->isFPOrFPVectorTy(),"FPTrunc only produces an FP", &I);
992 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
993 "fptrunc source and destination must both be a vector or neither",&I);
994 Assert1(SrcBitSize > DestBitSize,"DestTy too big for FPTrunc", &I);
999 void Verifier::visitFPExtInst(FPExtInst &I) {
1000 // Get the source and destination types
1001 Type *SrcTy = I.getOperand(0)->getType();
1002 Type *DestTy = I.getType();
1004 // Get the size of the types in bits, we'll need this later
1005 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
1006 unsigned DestBitSize = DestTy->getScalarSizeInBits();
1008 Assert1(SrcTy->isFPOrFPVectorTy(),"FPExt only operates on FP", &I);
1009 Assert1(DestTy->isFPOrFPVectorTy(),"FPExt only produces an FP", &I);
1010 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1011 "fpext source and destination must both be a vector or neither", &I);
1012 Assert1(SrcBitSize < DestBitSize,"DestTy too small for FPExt", &I);
1014 visitInstruction(I);
1017 void Verifier::visitUIToFPInst(UIToFPInst &I) {
1018 // Get the source and destination types
1019 Type *SrcTy = I.getOperand(0)->getType();
1020 Type *DestTy = I.getType();
1022 bool SrcVec = SrcTy->isVectorTy();
1023 bool DstVec = DestTy->isVectorTy();
1025 Assert1(SrcVec == DstVec,
1026 "UIToFP source and dest must both be vector or scalar", &I);
1027 Assert1(SrcTy->isIntOrIntVectorTy(),
1028 "UIToFP source must be integer or integer vector", &I);
1029 Assert1(DestTy->isFPOrFPVectorTy(),
1030 "UIToFP result must be FP or FP vector", &I);
1032 if (SrcVec && DstVec)
1033 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1034 cast<VectorType>(DestTy)->getNumElements(),
1035 "UIToFP source and dest vector length mismatch", &I);
1037 visitInstruction(I);
1040 void Verifier::visitSIToFPInst(SIToFPInst &I) {
1041 // Get the source and destination types
1042 Type *SrcTy = I.getOperand(0)->getType();
1043 Type *DestTy = I.getType();
1045 bool SrcVec = SrcTy->isVectorTy();
1046 bool DstVec = DestTy->isVectorTy();
1048 Assert1(SrcVec == DstVec,
1049 "SIToFP source and dest must both be vector or scalar", &I);
1050 Assert1(SrcTy->isIntOrIntVectorTy(),
1051 "SIToFP source must be integer or integer vector", &I);
1052 Assert1(DestTy->isFPOrFPVectorTy(),
1053 "SIToFP result must be FP or FP vector", &I);
1055 if (SrcVec && DstVec)
1056 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1057 cast<VectorType>(DestTy)->getNumElements(),
1058 "SIToFP source and dest vector length mismatch", &I);
1060 visitInstruction(I);
1063 void Verifier::visitFPToUIInst(FPToUIInst &I) {
1064 // Get the source and destination types
1065 Type *SrcTy = I.getOperand(0)->getType();
1066 Type *DestTy = I.getType();
1068 bool SrcVec = SrcTy->isVectorTy();
1069 bool DstVec = DestTy->isVectorTy();
1071 Assert1(SrcVec == DstVec,
1072 "FPToUI source and dest must both be vector or scalar", &I);
1073 Assert1(SrcTy->isFPOrFPVectorTy(), "FPToUI source must be FP or FP vector",
1075 Assert1(DestTy->isIntOrIntVectorTy(),
1076 "FPToUI result must be integer or integer vector", &I);
1078 if (SrcVec && DstVec)
1079 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1080 cast<VectorType>(DestTy)->getNumElements(),
1081 "FPToUI source and dest vector length mismatch", &I);
1083 visitInstruction(I);
1086 void Verifier::visitFPToSIInst(FPToSIInst &I) {
1087 // Get the source and destination types
1088 Type *SrcTy = I.getOperand(0)->getType();
1089 Type *DestTy = I.getType();
1091 bool SrcVec = SrcTy->isVectorTy();
1092 bool DstVec = DestTy->isVectorTy();
1094 Assert1(SrcVec == DstVec,
1095 "FPToSI source and dest must both be vector or scalar", &I);
1096 Assert1(SrcTy->isFPOrFPVectorTy(),
1097 "FPToSI source must be FP or FP vector", &I);
1098 Assert1(DestTy->isIntOrIntVectorTy(),
1099 "FPToSI result must be integer or integer vector", &I);
1101 if (SrcVec && DstVec)
1102 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1103 cast<VectorType>(DestTy)->getNumElements(),
1104 "FPToSI source and dest vector length mismatch", &I);
1106 visitInstruction(I);
1109 void Verifier::visitPtrToIntInst(PtrToIntInst &I) {
1110 // Get the source and destination types
1111 Type *SrcTy = I.getOperand(0)->getType();
1112 Type *DestTy = I.getType();
1114 Assert1(SrcTy->getScalarType()->isPointerTy(),
1115 "PtrToInt source must be pointer", &I);
1116 Assert1(DestTy->getScalarType()->isIntegerTy(),
1117 "PtrToInt result must be integral", &I);
1118 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1119 "PtrToInt type mismatch", &I);
1121 if (SrcTy->isVectorTy()) {
1122 VectorType *VSrc = dyn_cast<VectorType>(SrcTy);
1123 VectorType *VDest = dyn_cast<VectorType>(DestTy);
1124 Assert1(VSrc->getNumElements() == VDest->getNumElements(),
1125 "PtrToInt Vector width mismatch", &I);
1128 visitInstruction(I);
1131 void Verifier::visitIntToPtrInst(IntToPtrInst &I) {
1132 // Get the source and destination types
1133 Type *SrcTy = I.getOperand(0)->getType();
1134 Type *DestTy = I.getType();
1136 Assert1(SrcTy->getScalarType()->isIntegerTy(),
1137 "IntToPtr source must be an integral", &I);
1138 Assert1(DestTy->getScalarType()->isPointerTy(),
1139 "IntToPtr result must be a pointer",&I);
1140 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1141 "IntToPtr type mismatch", &I);
1142 if (SrcTy->isVectorTy()) {
1143 VectorType *VSrc = dyn_cast<VectorType>(SrcTy);
1144 VectorType *VDest = dyn_cast<VectorType>(DestTy);
1145 Assert1(VSrc->getNumElements() == VDest->getNumElements(),
1146 "IntToPtr Vector width mismatch", &I);
1148 visitInstruction(I);
1151 void Verifier::visitBitCastInst(BitCastInst &I) {
1152 // Get the source and destination types
1153 Type *SrcTy = I.getOperand(0)->getType();
1154 Type *DestTy = I.getType();
1156 // Get the size of the types in bits, we'll need this later
1157 unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
1158 unsigned DestBitSize = DestTy->getPrimitiveSizeInBits();
1160 // BitCast implies a no-op cast of type only. No bits change.
1161 // However, you can't cast pointers to anything but pointers.
1162 Assert1(SrcTy->isPointerTy() == DestTy->isPointerTy(),
1163 "Bitcast requires both operands to be pointer or neither", &I);
1164 Assert1(SrcBitSize == DestBitSize, "Bitcast requires types of same width",&I);
1166 // Disallow aggregates.
1167 Assert1(!SrcTy->isAggregateType(),
1168 "Bitcast operand must not be aggregate", &I);
1169 Assert1(!DestTy->isAggregateType(),
1170 "Bitcast type must not be aggregate", &I);
1172 visitInstruction(I);
1175 /// visitPHINode - Ensure that a PHI node is well formed.
1177 void Verifier::visitPHINode(PHINode &PN) {
1178 // Ensure that the PHI nodes are all grouped together at the top of the block.
1179 // This can be tested by checking whether the instruction before this is
1180 // either nonexistent (because this is begin()) or is a PHI node. If not,
1181 // then there is some other instruction before a PHI.
1182 Assert2(&PN == &PN.getParent()->front() ||
1183 isa<PHINode>(--BasicBlock::iterator(&PN)),
1184 "PHI nodes not grouped at top of basic block!",
1185 &PN, PN.getParent());
1187 // Check that all of the values of the PHI node have the same type as the
1188 // result, and that the incoming blocks are really basic blocks.
1189 for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i) {
1190 Assert1(PN.getType() == PN.getIncomingValue(i)->getType(),
1191 "PHI node operands are not the same type as the result!", &PN);
1194 // All other PHI node constraints are checked in the visitBasicBlock method.
1196 visitInstruction(PN);
1199 void Verifier::VerifyCallSite(CallSite CS) {
1200 Instruction *I = CS.getInstruction();
1202 Assert1(CS.getCalledValue()->getType()->isPointerTy(),
1203 "Called function must be a pointer!", I);
1204 PointerType *FPTy = cast<PointerType>(CS.getCalledValue()->getType());
1206 Assert1(FPTy->getElementType()->isFunctionTy(),
1207 "Called function is not pointer to function type!", I);
1208 FunctionType *FTy = cast<FunctionType>(FPTy->getElementType());
1210 // Verify that the correct number of arguments are being passed
1211 if (FTy->isVarArg())
1212 Assert1(CS.arg_size() >= FTy->getNumParams(),
1213 "Called function requires more parameters than were provided!",I);
1215 Assert1(CS.arg_size() == FTy->getNumParams(),
1216 "Incorrect number of arguments passed to called function!", I);
1218 // Verify that all arguments to the call match the function type.
1219 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
1220 Assert3(CS.getArgument(i)->getType() == FTy->getParamType(i),
1221 "Call parameter type does not match function signature!",
1222 CS.getArgument(i), FTy->getParamType(i), I);
1224 const AttributeSet &Attrs = CS.getAttributes();
1226 Assert1(VerifyAttributeCount(Attrs, CS.arg_size()),
1227 "Attribute after last parameter!", I);
1229 // Verify call attributes.
1230 VerifyFunctionAttrs(FTy, Attrs, I);
1232 if (FTy->isVarArg())
1233 // Check attributes on the varargs part.
1234 for (unsigned Idx = 1 + FTy->getNumParams(); Idx <= CS.arg_size(); ++Idx) {
1235 Attribute Attr = Attrs.getParamAttributes(Idx);
1237 VerifyParameterAttrs(Attr, CS.getArgument(Idx-1)->getType(), false, I);
1239 Assert1(!Attr.hasAttribute(Attribute::StructRet),
1240 "Attribute 'sret' cannot be used for vararg call arguments!", I);
1243 // Verify that there's no metadata unless it's a direct call to an intrinsic.
1244 if (CS.getCalledFunction() == 0 ||
1245 !CS.getCalledFunction()->getName().startswith("llvm.")) {
1246 for (FunctionType::param_iterator PI = FTy->param_begin(),
1247 PE = FTy->param_end(); PI != PE; ++PI)
1248 Assert1(!(*PI)->isMetadataTy(),
1249 "Function has metadata parameter but isn't an intrinsic", I);
1252 visitInstruction(*I);
1255 void Verifier::visitCallInst(CallInst &CI) {
1256 VerifyCallSite(&CI);
1258 if (Function *F = CI.getCalledFunction())
1259 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
1260 visitIntrinsicFunctionCall(ID, CI);
1263 void Verifier::visitInvokeInst(InvokeInst &II) {
1264 VerifyCallSite(&II);
1266 // Verify that there is a landingpad instruction as the first non-PHI
1267 // instruction of the 'unwind' destination.
1268 Assert1(II.getUnwindDest()->isLandingPad(),
1269 "The unwind destination does not have a landingpad instruction!",&II);
1271 visitTerminatorInst(II);
1274 /// visitBinaryOperator - Check that both arguments to the binary operator are
1275 /// of the same type!
1277 void Verifier::visitBinaryOperator(BinaryOperator &B) {
1278 Assert1(B.getOperand(0)->getType() == B.getOperand(1)->getType(),
1279 "Both operands to a binary operator are not of the same type!", &B);
1281 switch (B.getOpcode()) {
1282 // Check that integer arithmetic operators are only used with
1283 // integral operands.
1284 case Instruction::Add:
1285 case Instruction::Sub:
1286 case Instruction::Mul:
1287 case Instruction::SDiv:
1288 case Instruction::UDiv:
1289 case Instruction::SRem:
1290 case Instruction::URem:
1291 Assert1(B.getType()->isIntOrIntVectorTy(),
1292 "Integer arithmetic operators only work with integral types!", &B);
1293 Assert1(B.getType() == B.getOperand(0)->getType(),
1294 "Integer arithmetic operators must have same type "
1295 "for operands and result!", &B);
1297 // Check that floating-point arithmetic operators are only used with
1298 // floating-point operands.
1299 case Instruction::FAdd:
1300 case Instruction::FSub:
1301 case Instruction::FMul:
1302 case Instruction::FDiv:
1303 case Instruction::FRem:
1304 Assert1(B.getType()->isFPOrFPVectorTy(),
1305 "Floating-point arithmetic operators only work with "
1306 "floating-point types!", &B);
1307 Assert1(B.getType() == B.getOperand(0)->getType(),
1308 "Floating-point arithmetic operators must have same type "
1309 "for operands and result!", &B);
1311 // Check that logical operators are only used with integral operands.
1312 case Instruction::And:
1313 case Instruction::Or:
1314 case Instruction::Xor:
1315 Assert1(B.getType()->isIntOrIntVectorTy(),
1316 "Logical operators only work with integral types!", &B);
1317 Assert1(B.getType() == B.getOperand(0)->getType(),
1318 "Logical operators must have same type for operands and result!",
1321 case Instruction::Shl:
1322 case Instruction::LShr:
1323 case Instruction::AShr:
1324 Assert1(B.getType()->isIntOrIntVectorTy(),
1325 "Shifts only work with integral types!", &B);
1326 Assert1(B.getType() == B.getOperand(0)->getType(),
1327 "Shift return type must be same as operands!", &B);
1330 llvm_unreachable("Unknown BinaryOperator opcode!");
1333 visitInstruction(B);
1336 void Verifier::visitICmpInst(ICmpInst &IC) {
1337 // Check that the operands are the same type
1338 Type *Op0Ty = IC.getOperand(0)->getType();
1339 Type *Op1Ty = IC.getOperand(1)->getType();
1340 Assert1(Op0Ty == Op1Ty,
1341 "Both operands to ICmp instruction are not of the same type!", &IC);
1342 // Check that the operands are the right type
1343 Assert1(Op0Ty->isIntOrIntVectorTy() || Op0Ty->getScalarType()->isPointerTy(),
1344 "Invalid operand types for ICmp instruction", &IC);
1345 // Check that the predicate is valid.
1346 Assert1(IC.getPredicate() >= CmpInst::FIRST_ICMP_PREDICATE &&
1347 IC.getPredicate() <= CmpInst::LAST_ICMP_PREDICATE,
1348 "Invalid predicate in ICmp instruction!", &IC);
1350 visitInstruction(IC);
1353 void Verifier::visitFCmpInst(FCmpInst &FC) {
1354 // Check that the operands are the same type
1355 Type *Op0Ty = FC.getOperand(0)->getType();
1356 Type *Op1Ty = FC.getOperand(1)->getType();
1357 Assert1(Op0Ty == Op1Ty,
1358 "Both operands to FCmp instruction are not of the same type!", &FC);
1359 // Check that the operands are the right type
1360 Assert1(Op0Ty->isFPOrFPVectorTy(),
1361 "Invalid operand types for FCmp instruction", &FC);
1362 // Check that the predicate is valid.
1363 Assert1(FC.getPredicate() >= CmpInst::FIRST_FCMP_PREDICATE &&
1364 FC.getPredicate() <= CmpInst::LAST_FCMP_PREDICATE,
1365 "Invalid predicate in FCmp instruction!", &FC);
1367 visitInstruction(FC);
1370 void Verifier::visitExtractElementInst(ExtractElementInst &EI) {
1371 Assert1(ExtractElementInst::isValidOperands(EI.getOperand(0),
1373 "Invalid extractelement operands!", &EI);
1374 visitInstruction(EI);
1377 void Verifier::visitInsertElementInst(InsertElementInst &IE) {
1378 Assert1(InsertElementInst::isValidOperands(IE.getOperand(0),
1381 "Invalid insertelement operands!", &IE);
1382 visitInstruction(IE);
1385 void Verifier::visitShuffleVectorInst(ShuffleVectorInst &SV) {
1386 Assert1(ShuffleVectorInst::isValidOperands(SV.getOperand(0), SV.getOperand(1),
1388 "Invalid shufflevector operands!", &SV);
1389 visitInstruction(SV);
1392 void Verifier::visitGetElementPtrInst(GetElementPtrInst &GEP) {
1393 Type *TargetTy = GEP.getPointerOperandType()->getScalarType();
1395 Assert1(isa<PointerType>(TargetTy),
1396 "GEP base pointer is not a vector or a vector of pointers", &GEP);
1397 Assert1(cast<PointerType>(TargetTy)->getElementType()->isSized(),
1398 "GEP into unsized type!", &GEP);
1399 Assert1(GEP.getPointerOperandType()->isVectorTy() ==
1400 GEP.getType()->isVectorTy(), "Vector GEP must return a vector value",
1403 SmallVector<Value*, 16> Idxs(GEP.idx_begin(), GEP.idx_end());
1405 GetElementPtrInst::getIndexedType(GEP.getPointerOperandType(), Idxs);
1406 Assert1(ElTy, "Invalid indices for GEP pointer type!", &GEP);
1408 Assert2(GEP.getType()->getScalarType()->isPointerTy() &&
1409 cast<PointerType>(GEP.getType()->getScalarType())->getElementType()
1410 == ElTy, "GEP is not of right type for indices!", &GEP, ElTy);
1412 if (GEP.getPointerOperandType()->isVectorTy()) {
1413 // Additional checks for vector GEPs.
1414 unsigned GepWidth = GEP.getPointerOperandType()->getVectorNumElements();
1415 Assert1(GepWidth == GEP.getType()->getVectorNumElements(),
1416 "Vector GEP result width doesn't match operand's", &GEP);
1417 for (unsigned i = 0, e = Idxs.size(); i != e; ++i) {
1418 Type *IndexTy = Idxs[i]->getType();
1419 Assert1(IndexTy->isVectorTy(),
1420 "Vector GEP must have vector indices!", &GEP);
1421 unsigned IndexWidth = IndexTy->getVectorNumElements();
1422 Assert1(IndexWidth == GepWidth, "Invalid GEP index vector width", &GEP);
1425 visitInstruction(GEP);
1428 static bool isContiguous(const ConstantRange &A, const ConstantRange &B) {
1429 return A.getUpper() == B.getLower() || A.getLower() == B.getUpper();
1432 void Verifier::visitLoadInst(LoadInst &LI) {
1433 PointerType *PTy = dyn_cast<PointerType>(LI.getOperand(0)->getType());
1434 Assert1(PTy, "Load operand must be a pointer.", &LI);
1435 Type *ElTy = PTy->getElementType();
1436 Assert2(ElTy == LI.getType(),
1437 "Load result type does not match pointer operand type!", &LI, ElTy);
1438 if (LI.isAtomic()) {
1439 Assert1(LI.getOrdering() != Release && LI.getOrdering() != AcquireRelease,
1440 "Load cannot have Release ordering", &LI);
1441 Assert1(LI.getAlignment() != 0,
1442 "Atomic load must specify explicit alignment", &LI);
1443 if (!ElTy->isPointerTy()) {
1444 Assert2(ElTy->isIntegerTy(),
1445 "atomic store operand must have integer type!",
1447 unsigned Size = ElTy->getPrimitiveSizeInBits();
1448 Assert2(Size >= 8 && !(Size & (Size - 1)),
1449 "atomic store operand must be power-of-two byte-sized integer",
1453 Assert1(LI.getSynchScope() == CrossThread,
1454 "Non-atomic load cannot have SynchronizationScope specified", &LI);
1457 if (MDNode *Range = LI.getMetadata(LLVMContext::MD_range)) {
1458 unsigned NumOperands = Range->getNumOperands();
1459 Assert1(NumOperands % 2 == 0, "Unfinished range!", Range);
1460 unsigned NumRanges = NumOperands / 2;
1461 Assert1(NumRanges >= 1, "It should have at least one range!", Range);
1463 ConstantRange LastRange(1); // Dummy initial value
1464 for (unsigned i = 0; i < NumRanges; ++i) {
1465 ConstantInt *Low = dyn_cast<ConstantInt>(Range->getOperand(2*i));
1466 Assert1(Low, "The lower limit must be an integer!", Low);
1467 ConstantInt *High = dyn_cast<ConstantInt>(Range->getOperand(2*i + 1));
1468 Assert1(High, "The upper limit must be an integer!", High);
1469 Assert1(High->getType() == Low->getType() &&
1470 High->getType() == ElTy, "Range types must match load type!",
1473 APInt HighV = High->getValue();
1474 APInt LowV = Low->getValue();
1475 ConstantRange CurRange(LowV, HighV);
1476 Assert1(!CurRange.isEmptySet() && !CurRange.isFullSet(),
1477 "Range must not be empty!", Range);
1479 Assert1(CurRange.intersectWith(LastRange).isEmptySet(),
1480 "Intervals are overlapping", Range);
1481 Assert1(LowV.sgt(LastRange.getLower()), "Intervals are not in order",
1483 Assert1(!isContiguous(CurRange, LastRange), "Intervals are contiguous",
1486 LastRange = ConstantRange(LowV, HighV);
1488 if (NumRanges > 2) {
1490 dyn_cast<ConstantInt>(Range->getOperand(0))->getValue();
1492 dyn_cast<ConstantInt>(Range->getOperand(1))->getValue();
1493 ConstantRange FirstRange(FirstLow, FirstHigh);
1494 Assert1(FirstRange.intersectWith(LastRange).isEmptySet(),
1495 "Intervals are overlapping", Range);
1496 Assert1(!isContiguous(FirstRange, LastRange), "Intervals are contiguous",
1503 visitInstruction(LI);
1506 void Verifier::visitStoreInst(StoreInst &SI) {
1507 PointerType *PTy = dyn_cast<PointerType>(SI.getOperand(1)->getType());
1508 Assert1(PTy, "Store operand must be a pointer.", &SI);
1509 Type *ElTy = PTy->getElementType();
1510 Assert2(ElTy == SI.getOperand(0)->getType(),
1511 "Stored value type does not match pointer operand type!",
1513 if (SI.isAtomic()) {
1514 Assert1(SI.getOrdering() != Acquire && SI.getOrdering() != AcquireRelease,
1515 "Store cannot have Acquire ordering", &SI);
1516 Assert1(SI.getAlignment() != 0,
1517 "Atomic store must specify explicit alignment", &SI);
1518 if (!ElTy->isPointerTy()) {
1519 Assert2(ElTy->isIntegerTy(),
1520 "atomic store operand must have integer type!",
1522 unsigned Size = ElTy->getPrimitiveSizeInBits();
1523 Assert2(Size >= 8 && !(Size & (Size - 1)),
1524 "atomic store operand must be power-of-two byte-sized integer",
1528 Assert1(SI.getSynchScope() == CrossThread,
1529 "Non-atomic store cannot have SynchronizationScope specified", &SI);
1531 visitInstruction(SI);
1534 void Verifier::visitAllocaInst(AllocaInst &AI) {
1535 PointerType *PTy = AI.getType();
1536 Assert1(PTy->getAddressSpace() == 0,
1537 "Allocation instruction pointer not in the generic address space!",
1539 Assert1(PTy->getElementType()->isSized(), "Cannot allocate unsized type",
1541 Assert1(AI.getArraySize()->getType()->isIntegerTy(),
1542 "Alloca array size must have integer type", &AI);
1543 visitInstruction(AI);
1546 void Verifier::visitAtomicCmpXchgInst(AtomicCmpXchgInst &CXI) {
1547 Assert1(CXI.getOrdering() != NotAtomic,
1548 "cmpxchg instructions must be atomic.", &CXI);
1549 Assert1(CXI.getOrdering() != Unordered,
1550 "cmpxchg instructions cannot be unordered.", &CXI);
1551 PointerType *PTy = dyn_cast<PointerType>(CXI.getOperand(0)->getType());
1552 Assert1(PTy, "First cmpxchg operand must be a pointer.", &CXI);
1553 Type *ElTy = PTy->getElementType();
1554 Assert2(ElTy->isIntegerTy(),
1555 "cmpxchg operand must have integer type!",
1557 unsigned Size = ElTy->getPrimitiveSizeInBits();
1558 Assert2(Size >= 8 && !(Size & (Size - 1)),
1559 "cmpxchg operand must be power-of-two byte-sized integer",
1561 Assert2(ElTy == CXI.getOperand(1)->getType(),
1562 "Expected value type does not match pointer operand type!",
1564 Assert2(ElTy == CXI.getOperand(2)->getType(),
1565 "Stored value type does not match pointer operand type!",
1567 visitInstruction(CXI);
1570 void Verifier::visitAtomicRMWInst(AtomicRMWInst &RMWI) {
1571 Assert1(RMWI.getOrdering() != NotAtomic,
1572 "atomicrmw instructions must be atomic.", &RMWI);
1573 Assert1(RMWI.getOrdering() != Unordered,
1574 "atomicrmw instructions cannot be unordered.", &RMWI);
1575 PointerType *PTy = dyn_cast<PointerType>(RMWI.getOperand(0)->getType());
1576 Assert1(PTy, "First atomicrmw operand must be a pointer.", &RMWI);
1577 Type *ElTy = PTy->getElementType();
1578 Assert2(ElTy->isIntegerTy(),
1579 "atomicrmw operand must have integer type!",
1581 unsigned Size = ElTy->getPrimitiveSizeInBits();
1582 Assert2(Size >= 8 && !(Size & (Size - 1)),
1583 "atomicrmw operand must be power-of-two byte-sized integer",
1585 Assert2(ElTy == RMWI.getOperand(1)->getType(),
1586 "Argument value type does not match pointer operand type!",
1588 Assert1(AtomicRMWInst::FIRST_BINOP <= RMWI.getOperation() &&
1589 RMWI.getOperation() <= AtomicRMWInst::LAST_BINOP,
1590 "Invalid binary operation!", &RMWI);
1591 visitInstruction(RMWI);
1594 void Verifier::visitFenceInst(FenceInst &FI) {
1595 const AtomicOrdering Ordering = FI.getOrdering();
1596 Assert1(Ordering == Acquire || Ordering == Release ||
1597 Ordering == AcquireRelease || Ordering == SequentiallyConsistent,
1598 "fence instructions may only have "
1599 "acquire, release, acq_rel, or seq_cst ordering.", &FI);
1600 visitInstruction(FI);
1603 void Verifier::visitExtractValueInst(ExtractValueInst &EVI) {
1604 Assert1(ExtractValueInst::getIndexedType(EVI.getAggregateOperand()->getType(),
1605 EVI.getIndices()) ==
1607 "Invalid ExtractValueInst operands!", &EVI);
1609 visitInstruction(EVI);
1612 void Verifier::visitInsertValueInst(InsertValueInst &IVI) {
1613 Assert1(ExtractValueInst::getIndexedType(IVI.getAggregateOperand()->getType(),
1614 IVI.getIndices()) ==
1615 IVI.getOperand(1)->getType(),
1616 "Invalid InsertValueInst operands!", &IVI);
1618 visitInstruction(IVI);
1621 void Verifier::visitLandingPadInst(LandingPadInst &LPI) {
1622 BasicBlock *BB = LPI.getParent();
1624 // The landingpad instruction is ill-formed if it doesn't have any clauses and
1626 Assert1(LPI.getNumClauses() > 0 || LPI.isCleanup(),
1627 "LandingPadInst needs at least one clause or to be a cleanup.", &LPI);
1629 // The landingpad instruction defines its parent as a landing pad block. The
1630 // landing pad block may be branched to only by the unwind edge of an invoke.
1631 for (pred_iterator I = pred_begin(BB), E = pred_end(BB); I != E; ++I) {
1632 const InvokeInst *II = dyn_cast<InvokeInst>((*I)->getTerminator());
1633 Assert1(II && II->getUnwindDest() == BB && II->getNormalDest() != BB,
1634 "Block containing LandingPadInst must be jumped to "
1635 "only by the unwind edge of an invoke.", &LPI);
1638 // The landingpad instruction must be the first non-PHI instruction in the
1640 Assert1(LPI.getParent()->getLandingPadInst() == &LPI,
1641 "LandingPadInst not the first non-PHI instruction in the block.",
1644 // The personality functions for all landingpad instructions within the same
1645 // function should match.
1647 Assert1(LPI.getPersonalityFn() == PersonalityFn,
1648 "Personality function doesn't match others in function", &LPI);
1649 PersonalityFn = LPI.getPersonalityFn();
1651 // All operands must be constants.
1652 Assert1(isa<Constant>(PersonalityFn), "Personality function is not constant!",
1654 for (unsigned i = 0, e = LPI.getNumClauses(); i < e; ++i) {
1655 Value *Clause = LPI.getClause(i);
1656 Assert1(isa<Constant>(Clause), "Clause is not constant!", &LPI);
1657 if (LPI.isCatch(i)) {
1658 Assert1(isa<PointerType>(Clause->getType()),
1659 "Catch operand does not have pointer type!", &LPI);
1661 Assert1(LPI.isFilter(i), "Clause is neither catch nor filter!", &LPI);
1662 Assert1(isa<ConstantArray>(Clause) || isa<ConstantAggregateZero>(Clause),
1663 "Filter operand is not an array of constants!", &LPI);
1667 visitInstruction(LPI);
1670 void Verifier::verifyDominatesUse(Instruction &I, unsigned i) {
1671 Instruction *Op = cast<Instruction>(I.getOperand(i));
1672 // If the we have an invalid invoke, don't try to compute the dominance.
1673 // We already reject it in the invoke specific checks and the dominance
1674 // computation doesn't handle multiple edges.
1675 if (InvokeInst *II = dyn_cast<InvokeInst>(Op)) {
1676 if (II->getNormalDest() == II->getUnwindDest())
1680 const Use &U = I.getOperandUse(i);
1681 Assert2(InstsInThisBlock.count(Op) || DT->dominates(Op, U),
1682 "Instruction does not dominate all uses!", Op, &I);
1685 /// verifyInstruction - Verify that an instruction is well formed.
1687 void Verifier::visitInstruction(Instruction &I) {
1688 BasicBlock *BB = I.getParent();
1689 Assert1(BB, "Instruction not embedded in basic block!", &I);
1691 if (!isa<PHINode>(I)) { // Check that non-phi nodes are not self referential
1692 for (Value::use_iterator UI = I.use_begin(), UE = I.use_end();
1694 Assert1(*UI != (User*)&I || !DT->isReachableFromEntry(BB),
1695 "Only PHI nodes may reference their own value!", &I);
1698 // Check that void typed values don't have names
1699 Assert1(!I.getType()->isVoidTy() || !I.hasName(),
1700 "Instruction has a name, but provides a void value!", &I);
1702 // Check that the return value of the instruction is either void or a legal
1704 Assert1(I.getType()->isVoidTy() ||
1705 I.getType()->isFirstClassType(),
1706 "Instruction returns a non-scalar type!", &I);
1708 // Check that the instruction doesn't produce metadata. Calls are already
1709 // checked against the callee type.
1710 Assert1(!I.getType()->isMetadataTy() ||
1711 isa<CallInst>(I) || isa<InvokeInst>(I),
1712 "Invalid use of metadata!", &I);
1714 // Check that all uses of the instruction, if they are instructions
1715 // themselves, actually have parent basic blocks. If the use is not an
1716 // instruction, it is an error!
1717 for (User::use_iterator UI = I.use_begin(), UE = I.use_end();
1719 if (Instruction *Used = dyn_cast<Instruction>(*UI))
1720 Assert2(Used->getParent() != 0, "Instruction referencing instruction not"
1721 " embedded in a basic block!", &I, Used);
1723 CheckFailed("Use of instruction is not an instruction!", *UI);
1728 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
1729 Assert1(I.getOperand(i) != 0, "Instruction has null operand!", &I);
1731 // Check to make sure that only first-class-values are operands to
1733 if (!I.getOperand(i)->getType()->isFirstClassType()) {
1734 Assert1(0, "Instruction operands must be first-class values!", &I);
1737 if (Function *F = dyn_cast<Function>(I.getOperand(i))) {
1738 // Check to make sure that the "address of" an intrinsic function is never
1740 Assert1(!F->isIntrinsic() || i == (isa<CallInst>(I) ? e-1 : 0),
1741 "Cannot take the address of an intrinsic!", &I);
1742 Assert1(!F->isIntrinsic() || isa<CallInst>(I) ||
1743 F->getIntrinsicID() == Intrinsic::donothing,
1744 "Cannot invoke an intrinsinc other than donothing", &I);
1745 Assert1(F->getParent() == Mod, "Referencing function in another module!",
1747 } else if (BasicBlock *OpBB = dyn_cast<BasicBlock>(I.getOperand(i))) {
1748 Assert1(OpBB->getParent() == BB->getParent(),
1749 "Referring to a basic block in another function!", &I);
1750 } else if (Argument *OpArg = dyn_cast<Argument>(I.getOperand(i))) {
1751 Assert1(OpArg->getParent() == BB->getParent(),
1752 "Referring to an argument in another function!", &I);
1753 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(I.getOperand(i))) {
1754 Assert1(GV->getParent() == Mod, "Referencing global in another module!",
1756 } else if (isa<Instruction>(I.getOperand(i))) {
1757 verifyDominatesUse(I, i);
1758 } else if (isa<InlineAsm>(I.getOperand(i))) {
1759 Assert1((i + 1 == e && isa<CallInst>(I)) ||
1760 (i + 3 == e && isa<InvokeInst>(I)),
1761 "Cannot take the address of an inline asm!", &I);
1765 if (MDNode *MD = I.getMetadata(LLVMContext::MD_fpmath)) {
1766 Assert1(I.getType()->isFPOrFPVectorTy(),
1767 "fpmath requires a floating point result!", &I);
1768 Assert1(MD->getNumOperands() == 1, "fpmath takes one operand!", &I);
1769 Value *Op0 = MD->getOperand(0);
1770 if (ConstantFP *CFP0 = dyn_cast_or_null<ConstantFP>(Op0)) {
1771 APFloat Accuracy = CFP0->getValueAPF();
1772 Assert1(Accuracy.isNormal() && !Accuracy.isNegative(),
1773 "fpmath accuracy not a positive number!", &I);
1775 Assert1(false, "invalid fpmath accuracy!", &I);
1779 MDNode *MD = I.getMetadata(LLVMContext::MD_range);
1780 Assert1(!MD || isa<LoadInst>(I), "Ranges are only for loads!", &I);
1782 InstsInThisBlock.insert(&I);
1785 /// VerifyIntrinsicType - Verify that the specified type (which comes from an
1786 /// intrinsic argument or return value) matches the type constraints specified
1787 /// by the .td file (e.g. an "any integer" argument really is an integer).
1789 /// This return true on error but does not print a message.
1790 bool Verifier::VerifyIntrinsicType(Type *Ty,
1791 ArrayRef<Intrinsic::IITDescriptor> &Infos,
1792 SmallVectorImpl<Type*> &ArgTys) {
1793 using namespace Intrinsic;
1795 // If we ran out of descriptors, there are too many arguments.
1796 if (Infos.empty()) return true;
1797 IITDescriptor D = Infos.front();
1798 Infos = Infos.slice(1);
1801 case IITDescriptor::Void: return !Ty->isVoidTy();
1802 case IITDescriptor::MMX: return !Ty->isX86_MMXTy();
1803 case IITDescriptor::Metadata: return !Ty->isMetadataTy();
1804 case IITDescriptor::Float: return !Ty->isFloatTy();
1805 case IITDescriptor::Double: return !Ty->isDoubleTy();
1806 case IITDescriptor::Integer: return !Ty->isIntegerTy(D.Integer_Width);
1807 case IITDescriptor::Vector: {
1808 VectorType *VT = dyn_cast<VectorType>(Ty);
1809 return VT == 0 || VT->getNumElements() != D.Vector_Width ||
1810 VerifyIntrinsicType(VT->getElementType(), Infos, ArgTys);
1812 case IITDescriptor::Pointer: {
1813 PointerType *PT = dyn_cast<PointerType>(Ty);
1814 return PT == 0 || PT->getAddressSpace() != D.Pointer_AddressSpace ||
1815 VerifyIntrinsicType(PT->getElementType(), Infos, ArgTys);
1818 case IITDescriptor::Struct: {
1819 StructType *ST = dyn_cast<StructType>(Ty);
1820 if (ST == 0 || ST->getNumElements() != D.Struct_NumElements)
1823 for (unsigned i = 0, e = D.Struct_NumElements; i != e; ++i)
1824 if (VerifyIntrinsicType(ST->getElementType(i), Infos, ArgTys))
1829 case IITDescriptor::Argument:
1830 // Two cases here - If this is the second occurrence of an argument, verify
1831 // that the later instance matches the previous instance.
1832 if (D.getArgumentNumber() < ArgTys.size())
1833 return Ty != ArgTys[D.getArgumentNumber()];
1835 // Otherwise, if this is the first instance of an argument, record it and
1836 // verify the "Any" kind.
1837 assert(D.getArgumentNumber() == ArgTys.size() && "Table consistency error");
1838 ArgTys.push_back(Ty);
1840 switch (D.getArgumentKind()) {
1841 case IITDescriptor::AK_AnyInteger: return !Ty->isIntOrIntVectorTy();
1842 case IITDescriptor::AK_AnyFloat: return !Ty->isFPOrFPVectorTy();
1843 case IITDescriptor::AK_AnyVector: return !isa<VectorType>(Ty);
1844 case IITDescriptor::AK_AnyPointer: return !isa<PointerType>(Ty);
1846 llvm_unreachable("all argument kinds not covered");
1848 case IITDescriptor::ExtendVecArgument:
1849 // This may only be used when referring to a previous vector argument.
1850 return D.getArgumentNumber() >= ArgTys.size() ||
1851 !isa<VectorType>(ArgTys[D.getArgumentNumber()]) ||
1852 VectorType::getExtendedElementVectorType(
1853 cast<VectorType>(ArgTys[D.getArgumentNumber()])) != Ty;
1855 case IITDescriptor::TruncVecArgument:
1856 // This may only be used when referring to a previous vector argument.
1857 return D.getArgumentNumber() >= ArgTys.size() ||
1858 !isa<VectorType>(ArgTys[D.getArgumentNumber()]) ||
1859 VectorType::getTruncatedElementVectorType(
1860 cast<VectorType>(ArgTys[D.getArgumentNumber()])) != Ty;
1862 llvm_unreachable("unhandled");
1865 /// visitIntrinsicFunction - Allow intrinsics to be verified in different ways.
1867 void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) {
1868 Function *IF = CI.getCalledFunction();
1869 Assert1(IF->isDeclaration(), "Intrinsic functions should never be defined!",
1872 // Verify that the intrinsic prototype lines up with what the .td files
1874 FunctionType *IFTy = IF->getFunctionType();
1875 Assert1(!IFTy->isVarArg(), "Intrinsic prototypes are not varargs", IF);
1877 SmallVector<Intrinsic::IITDescriptor, 8> Table;
1878 getIntrinsicInfoTableEntries(ID, Table);
1879 ArrayRef<Intrinsic::IITDescriptor> TableRef = Table;
1881 SmallVector<Type *, 4> ArgTys;
1882 Assert1(!VerifyIntrinsicType(IFTy->getReturnType(), TableRef, ArgTys),
1883 "Intrinsic has incorrect return type!", IF);
1884 for (unsigned i = 0, e = IFTy->getNumParams(); i != e; ++i)
1885 Assert1(!VerifyIntrinsicType(IFTy->getParamType(i), TableRef, ArgTys),
1886 "Intrinsic has incorrect argument type!", IF);
1887 Assert1(TableRef.empty(), "Intrinsic has too few arguments!", IF);
1889 // Now that we have the intrinsic ID and the actual argument types (and we
1890 // know they are legal for the intrinsic!) get the intrinsic name through the
1891 // usual means. This allows us to verify the mangling of argument types into
1893 Assert1(Intrinsic::getName(ID, ArgTys) == IF->getName(),
1894 "Intrinsic name not mangled correctly for type arguments!", IF);
1896 // If the intrinsic takes MDNode arguments, verify that they are either global
1897 // or are local to *this* function.
1898 for (unsigned i = 0, e = CI.getNumArgOperands(); i != e; ++i)
1899 if (MDNode *MD = dyn_cast<MDNode>(CI.getArgOperand(i)))
1900 visitMDNode(*MD, CI.getParent()->getParent());
1905 case Intrinsic::ctlz: // llvm.ctlz
1906 case Intrinsic::cttz: // llvm.cttz
1907 Assert1(isa<ConstantInt>(CI.getArgOperand(1)),
1908 "is_zero_undef argument of bit counting intrinsics must be a "
1909 "constant int", &CI);
1911 case Intrinsic::dbg_declare: { // llvm.dbg.declare
1912 Assert1(CI.getArgOperand(0) && isa<MDNode>(CI.getArgOperand(0)),
1913 "invalid llvm.dbg.declare intrinsic call 1", &CI);
1914 MDNode *MD = cast<MDNode>(CI.getArgOperand(0));
1915 Assert1(MD->getNumOperands() == 1,
1916 "invalid llvm.dbg.declare intrinsic call 2", &CI);
1918 case Intrinsic::memcpy:
1919 case Intrinsic::memmove:
1920 case Intrinsic::memset:
1921 Assert1(isa<ConstantInt>(CI.getArgOperand(3)),
1922 "alignment argument of memory intrinsics must be a constant int",
1924 Assert1(isa<ConstantInt>(CI.getArgOperand(4)),
1925 "isvolatile argument of memory intrinsics must be a constant int",
1928 case Intrinsic::gcroot:
1929 case Intrinsic::gcwrite:
1930 case Intrinsic::gcread:
1931 if (ID == Intrinsic::gcroot) {
1933 dyn_cast<AllocaInst>(CI.getArgOperand(0)->stripPointerCasts());
1934 Assert1(AI, "llvm.gcroot parameter #1 must be an alloca.", &CI);
1935 Assert1(isa<Constant>(CI.getArgOperand(1)),
1936 "llvm.gcroot parameter #2 must be a constant.", &CI);
1937 if (!AI->getType()->getElementType()->isPointerTy()) {
1938 Assert1(!isa<ConstantPointerNull>(CI.getArgOperand(1)),
1939 "llvm.gcroot parameter #1 must either be a pointer alloca, "
1940 "or argument #2 must be a non-null constant.", &CI);
1944 Assert1(CI.getParent()->getParent()->hasGC(),
1945 "Enclosing function does not use GC.", &CI);
1947 case Intrinsic::init_trampoline:
1948 Assert1(isa<Function>(CI.getArgOperand(1)->stripPointerCasts()),
1949 "llvm.init_trampoline parameter #2 must resolve to a function.",
1952 case Intrinsic::prefetch:
1953 Assert1(isa<ConstantInt>(CI.getArgOperand(1)) &&
1954 isa<ConstantInt>(CI.getArgOperand(2)) &&
1955 cast<ConstantInt>(CI.getArgOperand(1))->getZExtValue() < 2 &&
1956 cast<ConstantInt>(CI.getArgOperand(2))->getZExtValue() < 4,
1957 "invalid arguments to llvm.prefetch",
1960 case Intrinsic::stackprotector:
1961 Assert1(isa<AllocaInst>(CI.getArgOperand(1)->stripPointerCasts()),
1962 "llvm.stackprotector parameter #2 must resolve to an alloca.",
1965 case Intrinsic::lifetime_start:
1966 case Intrinsic::lifetime_end:
1967 case Intrinsic::invariant_start:
1968 Assert1(isa<ConstantInt>(CI.getArgOperand(0)),
1969 "size argument of memory use markers must be a constant integer",
1972 case Intrinsic::invariant_end:
1973 Assert1(isa<ConstantInt>(CI.getArgOperand(1)),
1974 "llvm.invariant.end parameter #2 must be a constant integer", &CI);
1979 //===----------------------------------------------------------------------===//
1980 // Implement the public interfaces to this file...
1981 //===----------------------------------------------------------------------===//
1983 FunctionPass *llvm::createVerifierPass(VerifierFailureAction action) {
1984 return new Verifier(action);
1988 /// verifyFunction - Check a function for errors, printing messages on stderr.
1989 /// Return true if the function is corrupt.
1991 bool llvm::verifyFunction(const Function &f, VerifierFailureAction action) {
1992 Function &F = const_cast<Function&>(f);
1993 assert(!F.isDeclaration() && "Cannot verify external functions");
1995 FunctionPassManager FPM(F.getParent());
1996 Verifier *V = new Verifier(action);
2002 /// verifyModule - Check a module for errors, printing messages on stderr.
2003 /// Return true if the module is corrupt.
2005 bool llvm::verifyModule(const Module &M, VerifierFailureAction action,
2006 std::string *ErrorInfo) {
2008 Verifier *V = new Verifier(action);
2010 PM.run(const_cast<Module&>(M));
2012 if (ErrorInfo && V->Broken)
2013 *ErrorInfo = V->MessagesStr.str();