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/IR/CallingConv.h"
57 #include "llvm/IR/Constants.h"
58 #include "llvm/IR/DerivedTypes.h"
59 #include "llvm/IR/InlineAsm.h"
60 #include "llvm/IR/IntrinsicInst.h"
61 #include "llvm/IR/LLVMContext.h"
62 #include "llvm/IR/Metadata.h"
63 #include "llvm/IR/Module.h"
64 #include "llvm/InstVisitor.h"
65 #include "llvm/Pass.h"
66 #include "llvm/PassManager.h"
67 #include "llvm/Support/CFG.h"
68 #include "llvm/Support/CallSite.h"
69 #include "llvm/Support/ConstantRange.h"
70 #include "llvm/Support/Debug.h"
71 #include "llvm/Support/ErrorHandling.h"
72 #include "llvm/Support/raw_ostream.h"
77 namespace { // Anonymous namespace for class
78 struct PreVerifier : public FunctionPass {
79 static char ID; // Pass ID, replacement for typeid
81 PreVerifier() : FunctionPass(ID) {
82 initializePreVerifierPass(*PassRegistry::getPassRegistry());
85 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
89 // Check that the prerequisites for successful DominatorTree construction
91 bool runOnFunction(Function &F) {
94 for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I) {
95 if (I->empty() || !I->back().isTerminator()) {
96 dbgs() << "Basic Block in function '" << F.getName()
97 << "' does not have terminator!\n";
98 WriteAsOperand(dbgs(), I, true);
105 report_fatal_error("Broken module, no Basic Block terminator!");
112 char PreVerifier::ID = 0;
113 INITIALIZE_PASS(PreVerifier, "preverify", "Preliminary module verification",
115 static char &PreVerifyID = PreVerifier::ID;
118 struct Verifier : public FunctionPass, public InstVisitor<Verifier> {
119 static char ID; // Pass ID, replacement for typeid
120 bool Broken; // Is this module found to be broken?
121 VerifierFailureAction action;
122 // What to do if verification fails.
123 Module *Mod; // Module we are verifying right now
124 LLVMContext *Context; // Context within which we are verifying
125 DominatorTree *DT; // Dominator Tree, caution can be null!
127 std::string Messages;
128 raw_string_ostream MessagesStr;
130 /// InstInThisBlock - when verifying a basic block, keep track of all of the
131 /// instructions we have seen so far. This allows us to do efficient
132 /// dominance checks for the case when an instruction has an operand that is
133 /// an instruction in the same block.
134 SmallPtrSet<Instruction*, 16> InstsInThisBlock;
136 /// MDNodes - keep track of the metadata nodes that have been checked
138 SmallPtrSet<MDNode *, 32> MDNodes;
140 /// PersonalityFn - The personality function referenced by the
141 /// LandingPadInsts. All LandingPadInsts within the same function must use
142 /// the same personality function.
143 const Value *PersonalityFn;
146 : FunctionPass(ID), Broken(false),
147 action(AbortProcessAction), Mod(0), Context(0), DT(0),
148 MessagesStr(Messages), PersonalityFn(0) {
149 initializeVerifierPass(*PassRegistry::getPassRegistry());
151 explicit Verifier(VerifierFailureAction ctn)
152 : FunctionPass(ID), Broken(false), action(ctn), Mod(0),
153 Context(0), DT(0), MessagesStr(Messages), PersonalityFn(0) {
154 initializeVerifierPass(*PassRegistry::getPassRegistry());
157 bool doInitialization(Module &M) {
159 Context = &M.getContext();
161 // We must abort before returning back to the pass manager, or else the
162 // pass manager may try to run other passes on the broken module.
163 return abortIfBroken();
166 bool runOnFunction(Function &F) {
167 // Get dominator information if we are being run by PassManager
168 DT = &getAnalysis<DominatorTree>();
171 if (!Context) Context = &F.getContext();
174 InstsInThisBlock.clear();
177 // We must abort before returning back to the pass manager, or else the
178 // pass manager may try to run other passes on the broken module.
179 return abortIfBroken();
182 bool doFinalization(Module &M) {
183 // Scan through, checking all of the external function's linkage now...
184 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
185 visitGlobalValue(*I);
187 // Check to make sure function prototypes are okay.
188 if (I->isDeclaration()) visitFunction(*I);
191 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
193 visitGlobalVariable(*I);
195 for (Module::alias_iterator I = M.alias_begin(), E = M.alias_end();
197 visitGlobalAlias(*I);
199 for (Module::named_metadata_iterator I = M.named_metadata_begin(),
200 E = M.named_metadata_end(); I != E; ++I)
201 visitNamedMDNode(*I);
203 // If the module is broken, abort at this time.
204 return abortIfBroken();
207 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
208 AU.setPreservesAll();
209 AU.addRequiredID(PreVerifyID);
210 AU.addRequired<DominatorTree>();
213 /// abortIfBroken - If the module is broken and we are supposed to abort on
214 /// this condition, do so.
216 bool abortIfBroken() {
217 if (!Broken) return false;
218 MessagesStr << "Broken module found, ";
220 case AbortProcessAction:
221 MessagesStr << "compilation aborted!\n";
222 dbgs() << MessagesStr.str();
223 // Client should choose different reaction if abort is not desired
225 case PrintMessageAction:
226 MessagesStr << "verification continues.\n";
227 dbgs() << MessagesStr.str();
229 case ReturnStatusAction:
230 MessagesStr << "compilation terminated.\n";
233 llvm_unreachable("Invalid action");
237 // Verification methods...
238 void visitGlobalValue(GlobalValue &GV);
239 void visitGlobalVariable(GlobalVariable &GV);
240 void visitGlobalAlias(GlobalAlias &GA);
241 void visitNamedMDNode(NamedMDNode &NMD);
242 void visitMDNode(MDNode &MD, Function *F);
243 void visitFunction(Function &F);
244 void visitBasicBlock(BasicBlock &BB);
245 using InstVisitor<Verifier>::visit;
247 void visit(Instruction &I);
249 void visitTruncInst(TruncInst &I);
250 void visitZExtInst(ZExtInst &I);
251 void visitSExtInst(SExtInst &I);
252 void visitFPTruncInst(FPTruncInst &I);
253 void visitFPExtInst(FPExtInst &I);
254 void visitFPToUIInst(FPToUIInst &I);
255 void visitFPToSIInst(FPToSIInst &I);
256 void visitUIToFPInst(UIToFPInst &I);
257 void visitSIToFPInst(SIToFPInst &I);
258 void visitIntToPtrInst(IntToPtrInst &I);
259 void visitPtrToIntInst(PtrToIntInst &I);
260 void visitBitCastInst(BitCastInst &I);
261 void visitPHINode(PHINode &PN);
262 void visitBinaryOperator(BinaryOperator &B);
263 void visitICmpInst(ICmpInst &IC);
264 void visitFCmpInst(FCmpInst &FC);
265 void visitExtractElementInst(ExtractElementInst &EI);
266 void visitInsertElementInst(InsertElementInst &EI);
267 void visitShuffleVectorInst(ShuffleVectorInst &EI);
268 void visitVAArgInst(VAArgInst &VAA) { visitInstruction(VAA); }
269 void visitCallInst(CallInst &CI);
270 void visitInvokeInst(InvokeInst &II);
271 void visitGetElementPtrInst(GetElementPtrInst &GEP);
272 void visitLoadInst(LoadInst &LI);
273 void visitStoreInst(StoreInst &SI);
274 void verifyDominatesUse(Instruction &I, unsigned i);
275 void visitInstruction(Instruction &I);
276 void visitTerminatorInst(TerminatorInst &I);
277 void visitBranchInst(BranchInst &BI);
278 void visitReturnInst(ReturnInst &RI);
279 void visitSwitchInst(SwitchInst &SI);
280 void visitIndirectBrInst(IndirectBrInst &BI);
281 void visitSelectInst(SelectInst &SI);
282 void visitUserOp1(Instruction &I);
283 void visitUserOp2(Instruction &I) { visitUserOp1(I); }
284 void visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI);
285 void visitAtomicCmpXchgInst(AtomicCmpXchgInst &CXI);
286 void visitAtomicRMWInst(AtomicRMWInst &RMWI);
287 void visitFenceInst(FenceInst &FI);
288 void visitAllocaInst(AllocaInst &AI);
289 void visitExtractValueInst(ExtractValueInst &EVI);
290 void visitInsertValueInst(InsertValueInst &IVI);
291 void visitLandingPadInst(LandingPadInst &LPI);
293 void VerifyCallSite(CallSite CS);
294 bool PerformTypeCheck(Intrinsic::ID ID, Function *F, Type *Ty,
295 int VT, unsigned ArgNo, std::string &Suffix);
296 bool VerifyIntrinsicType(Type *Ty,
297 ArrayRef<Intrinsic::IITDescriptor> &Infos,
298 SmallVectorImpl<Type*> &ArgTys);
299 void VerifyParameterAttrs(Attribute Attrs, Type *Ty,
300 bool isReturnValue, const Value *V);
301 void VerifyFunctionAttrs(FunctionType *FT, const AttributeSet &Attrs,
304 void WriteValue(const Value *V) {
306 if (isa<Instruction>(V)) {
307 MessagesStr << *V << '\n';
309 WriteAsOperand(MessagesStr, V, true, Mod);
314 void WriteType(Type *T) {
316 MessagesStr << ' ' << *T;
320 // CheckFailed - A check failed, so print out the condition and the message
321 // that failed. This provides a nice place to put a breakpoint if you want
322 // to see why something is not correct.
323 void CheckFailed(const Twine &Message,
324 const Value *V1 = 0, const Value *V2 = 0,
325 const Value *V3 = 0, const Value *V4 = 0) {
326 MessagesStr << Message.str() << "\n";
334 void CheckFailed(const Twine &Message, const Value *V1,
335 Type *T2, const Value *V3 = 0) {
336 MessagesStr << Message.str() << "\n";
343 void CheckFailed(const Twine &Message, Type *T1,
344 Type *T2 = 0, Type *T3 = 0) {
345 MessagesStr << Message.str() << "\n";
352 } // End anonymous namespace
354 char Verifier::ID = 0;
355 INITIALIZE_PASS_BEGIN(Verifier, "verify", "Module Verifier", false, false)
356 INITIALIZE_PASS_DEPENDENCY(PreVerifier)
357 INITIALIZE_PASS_DEPENDENCY(DominatorTree)
358 INITIALIZE_PASS_END(Verifier, "verify", "Module Verifier", false, false)
360 // Assert - We know that cond should be true, if not print an error message.
361 #define Assert(C, M) \
362 do { if (!(C)) { CheckFailed(M); return; } } while (0)
363 #define Assert1(C, M, V1) \
364 do { if (!(C)) { CheckFailed(M, V1); return; } } while (0)
365 #define Assert2(C, M, V1, V2) \
366 do { if (!(C)) { CheckFailed(M, V1, V2); return; } } while (0)
367 #define Assert3(C, M, V1, V2, V3) \
368 do { if (!(C)) { CheckFailed(M, V1, V2, V3); return; } } while (0)
369 #define Assert4(C, M, V1, V2, V3, V4) \
370 do { if (!(C)) { CheckFailed(M, V1, V2, V3, V4); return; } } while (0)
372 void Verifier::visit(Instruction &I) {
373 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
374 Assert1(I.getOperand(i) != 0, "Operand is null", &I);
375 InstVisitor<Verifier>::visit(I);
379 void Verifier::visitGlobalValue(GlobalValue &GV) {
380 Assert1(!GV.isDeclaration() ||
381 GV.isMaterializable() ||
382 GV.hasExternalLinkage() ||
383 GV.hasDLLImportLinkage() ||
384 GV.hasExternalWeakLinkage() ||
385 (isa<GlobalAlias>(GV) &&
386 (GV.hasLocalLinkage() || GV.hasWeakLinkage())),
387 "Global is external, but doesn't have external or dllimport or weak linkage!",
390 Assert1(!GV.hasDLLImportLinkage() || GV.isDeclaration(),
391 "Global is marked as dllimport, but not external", &GV);
393 Assert1(!GV.hasAppendingLinkage() || isa<GlobalVariable>(GV),
394 "Only global variables can have appending linkage!", &GV);
396 if (GV.hasAppendingLinkage()) {
397 GlobalVariable *GVar = dyn_cast<GlobalVariable>(&GV);
398 Assert1(GVar && GVar->getType()->getElementType()->isArrayTy(),
399 "Only global arrays can have appending linkage!", GVar);
402 Assert1(!GV.hasLinkOnceODRAutoHideLinkage() || GV.hasDefaultVisibility(),
403 "linkonce_odr_auto_hide can only have default visibility!",
407 void Verifier::visitGlobalVariable(GlobalVariable &GV) {
408 if (GV.hasInitializer()) {
409 Assert1(GV.getInitializer()->getType() == GV.getType()->getElementType(),
410 "Global variable initializer type does not match global "
411 "variable type!", &GV);
413 // If the global has common linkage, it must have a zero initializer and
414 // cannot be constant.
415 if (GV.hasCommonLinkage()) {
416 Assert1(GV.getInitializer()->isNullValue(),
417 "'common' global must have a zero initializer!", &GV);
418 Assert1(!GV.isConstant(), "'common' global may not be marked constant!",
422 Assert1(GV.hasExternalLinkage() || GV.hasDLLImportLinkage() ||
423 GV.hasExternalWeakLinkage(),
424 "invalid linkage type for global declaration", &GV);
427 if (GV.hasName() && (GV.getName() == "llvm.global_ctors" ||
428 GV.getName() == "llvm.global_dtors")) {
429 Assert1(!GV.hasInitializer() || GV.hasAppendingLinkage(),
430 "invalid linkage for intrinsic global variable", &GV);
431 // Don't worry about emitting an error for it not being an array,
432 // visitGlobalValue will complain on appending non-array.
433 if (ArrayType *ATy = dyn_cast<ArrayType>(GV.getType())) {
434 StructType *STy = dyn_cast<StructType>(ATy->getElementType());
435 PointerType *FuncPtrTy =
436 FunctionType::get(Type::getVoidTy(*Context), false)->getPointerTo();
437 Assert1(STy && STy->getNumElements() == 2 &&
438 STy->getTypeAtIndex(0u)->isIntegerTy(32) &&
439 STy->getTypeAtIndex(1) == FuncPtrTy,
440 "wrong type for intrinsic global variable", &GV);
444 visitGlobalValue(GV);
447 void Verifier::visitGlobalAlias(GlobalAlias &GA) {
448 Assert1(!GA.getName().empty(),
449 "Alias name cannot be empty!", &GA);
450 Assert1(GA.hasExternalLinkage() || GA.hasLocalLinkage() ||
452 "Alias should have external or external weak linkage!", &GA);
453 Assert1(GA.getAliasee(),
454 "Aliasee cannot be NULL!", &GA);
455 Assert1(GA.getType() == GA.getAliasee()->getType(),
456 "Alias and aliasee types should match!", &GA);
457 Assert1(!GA.hasUnnamedAddr(), "Alias cannot have unnamed_addr!", &GA);
459 if (!isa<GlobalValue>(GA.getAliasee())) {
460 const ConstantExpr *CE = dyn_cast<ConstantExpr>(GA.getAliasee());
462 (CE->getOpcode() == Instruction::BitCast ||
463 CE->getOpcode() == Instruction::GetElementPtr) &&
464 isa<GlobalValue>(CE->getOperand(0)),
465 "Aliasee should be either GlobalValue or bitcast of GlobalValue",
469 const GlobalValue* Aliasee = GA.resolveAliasedGlobal(/*stopOnWeak*/ false);
471 "Aliasing chain should end with function or global variable", &GA);
473 visitGlobalValue(GA);
476 void Verifier::visitNamedMDNode(NamedMDNode &NMD) {
477 for (unsigned i = 0, e = NMD.getNumOperands(); i != e; ++i) {
478 MDNode *MD = NMD.getOperand(i);
482 Assert1(!MD->isFunctionLocal(),
483 "Named metadata operand cannot be function local!", MD);
488 void Verifier::visitMDNode(MDNode &MD, Function *F) {
489 // Only visit each node once. Metadata can be mutually recursive, so this
490 // avoids infinite recursion here, as well as being an optimization.
491 if (!MDNodes.insert(&MD))
494 for (unsigned i = 0, e = MD.getNumOperands(); i != e; ++i) {
495 Value *Op = MD.getOperand(i);
498 if (isa<Constant>(Op) || isa<MDString>(Op))
500 if (MDNode *N = dyn_cast<MDNode>(Op)) {
501 Assert2(MD.isFunctionLocal() || !N->isFunctionLocal(),
502 "Global metadata operand cannot be function local!", &MD, N);
506 Assert2(MD.isFunctionLocal(), "Invalid operand for global metadata!", &MD, Op);
508 // If this was an instruction, bb, or argument, verify that it is in the
509 // function that we expect.
510 Function *ActualF = 0;
511 if (Instruction *I = dyn_cast<Instruction>(Op))
512 ActualF = I->getParent()->getParent();
513 else if (BasicBlock *BB = dyn_cast<BasicBlock>(Op))
514 ActualF = BB->getParent();
515 else if (Argument *A = dyn_cast<Argument>(Op))
516 ActualF = A->getParent();
517 assert(ActualF && "Unimplemented function local metadata case!");
519 Assert2(ActualF == F, "function-local metadata used in wrong function",
524 // VerifyParameterAttrs - Check the given attributes for an argument or return
525 // value of the specified type. The value V is printed in error messages.
526 void Verifier::VerifyParameterAttrs(Attribute Attrs, Type *Ty,
527 bool isReturnValue, const Value *V) {
528 if (!Attrs.hasAttributes())
531 Assert1(!Attrs.hasAttribute(Attribute::NoReturn) &&
532 !Attrs.hasAttribute(Attribute::NoUnwind) &&
533 !Attrs.hasAttribute(Attribute::ReadNone) &&
534 !Attrs.hasAttribute(Attribute::ReadOnly) &&
535 !Attrs.hasAttribute(Attribute::NoInline) &&
536 !Attrs.hasAttribute(Attribute::AlwaysInline) &&
537 !Attrs.hasAttribute(Attribute::OptimizeForSize) &&
538 !Attrs.hasAttribute(Attribute::StackProtect) &&
539 !Attrs.hasAttribute(Attribute::StackProtectReq) &&
540 !Attrs.hasAttribute(Attribute::NoRedZone) &&
541 !Attrs.hasAttribute(Attribute::NoImplicitFloat) &&
542 !Attrs.hasAttribute(Attribute::Naked) &&
543 !Attrs.hasAttribute(Attribute::InlineHint) &&
544 !Attrs.hasAttribute(Attribute::StackAlignment) &&
545 !Attrs.hasAttribute(Attribute::UWTable) &&
546 !Attrs.hasAttribute(Attribute::NonLazyBind) &&
547 !Attrs.hasAttribute(Attribute::ReturnsTwice) &&
548 !Attrs.hasAttribute(Attribute::AddressSafety) &&
549 !Attrs.hasAttribute(Attribute::MinSize),
550 "Some attributes in '" + Attrs.getAsString() +
551 "' only apply to functions!", V);
554 Assert1(!Attrs.hasAttribute(Attribute::ByVal) &&
555 !Attrs.hasAttribute(Attribute::Nest) &&
556 !Attrs.hasAttribute(Attribute::StructRet) &&
557 !Attrs.hasAttribute(Attribute::NoCapture),
558 "Attribute 'byval', 'nest', 'sret', and 'nocapture' "
559 "do not apply to return values!", V);
561 // Check for mutually incompatible attributes.
562 Assert1(!((Attrs.hasAttribute(Attribute::ByVal) &&
563 Attrs.hasAttribute(Attribute::Nest)) ||
564 (Attrs.hasAttribute(Attribute::ByVal) &&
565 Attrs.hasAttribute(Attribute::StructRet)) ||
566 (Attrs.hasAttribute(Attribute::Nest) &&
567 Attrs.hasAttribute(Attribute::StructRet))), "Attributes "
568 "'byval, nest, and sret' are incompatible!", V);
570 Assert1(!((Attrs.hasAttribute(Attribute::ByVal) &&
571 Attrs.hasAttribute(Attribute::Nest)) ||
572 (Attrs.hasAttribute(Attribute::ByVal) &&
573 Attrs.hasAttribute(Attribute::InReg)) ||
574 (Attrs.hasAttribute(Attribute::Nest) &&
575 Attrs.hasAttribute(Attribute::InReg))), "Attributes "
576 "'byval, nest, and inreg' are incompatible!", V);
578 Assert1(!(Attrs.hasAttribute(Attribute::ZExt) &&
579 Attrs.hasAttribute(Attribute::SExt)), "Attributes "
580 "'zeroext and signext' are incompatible!", V);
582 Assert1(!(Attrs.hasAttribute(Attribute::ReadNone) &&
583 Attrs.hasAttribute(Attribute::ReadOnly)), "Attributes "
584 "'readnone and readonly' are incompatible!", V);
586 Assert1(!(Attrs.hasAttribute(Attribute::NoInline) &&
587 Attrs.hasAttribute(Attribute::AlwaysInline)), "Attributes "
588 "'noinline and alwaysinline' are incompatible!", V);
590 Assert1(!AttrBuilder(Attrs).
591 hasAttributes(Attribute::typeIncompatible(Ty)),
592 "Wrong types for attribute: " +
593 Attribute::typeIncompatible(Ty).getAsString(), V);
595 if (PointerType *PTy = dyn_cast<PointerType>(Ty))
596 Assert1(!Attrs.hasAttribute(Attribute::ByVal) ||
597 PTy->getElementType()->isSized(),
598 "Attribute 'byval' does not support unsized types!", V);
600 Assert1(!Attrs.hasAttribute(Attribute::ByVal),
601 "Attribute 'byval' only applies to parameters with pointer type!",
605 // VerifyFunctionAttrs - Check parameter attributes against a function type.
606 // The value V is printed in error messages.
607 void Verifier::VerifyFunctionAttrs(FunctionType *FT,
608 const AttributeSet &Attrs,
613 bool SawNest = false;
615 for (unsigned i = 0, e = Attrs.getNumSlots(); i != e; ++i) {
616 const AttributeWithIndex &Attr = Attrs.getSlot(i);
620 Ty = FT->getReturnType();
621 else if (Attr.Index-1 < FT->getNumParams())
622 Ty = FT->getParamType(Attr.Index-1);
624 break; // VarArgs attributes, verified elsewhere.
626 VerifyParameterAttrs(Attr.Attrs, Ty, Attr.Index == 0, V);
628 if (Attr.Attrs.hasAttribute(Attribute::Nest)) {
629 Assert1(!SawNest, "More than one parameter has attribute nest!", V);
633 if (Attr.Attrs.hasAttribute(Attribute::StructRet))
634 Assert1(Attr.Index == 1, "Attribute sret is not on first parameter!", V);
637 Attribute FAttrs = Attrs.getFnAttributes();
638 AttrBuilder NotFn(FAttrs);
639 NotFn.removeFunctionOnlyAttrs();
640 Assert1(!NotFn.hasAttributes(), "Attribute '" +
641 Attribute::get(V->getContext(), NotFn).getAsString() +
642 "' do not apply to the function!", V);
644 // Check for mutually incompatible attributes.
645 Assert1(!((FAttrs.hasAttribute(Attribute::ByVal) &&
646 FAttrs.hasAttribute(Attribute::Nest)) ||
647 (FAttrs.hasAttribute(Attribute::ByVal) &&
648 FAttrs.hasAttribute(Attribute::StructRet)) ||
649 (FAttrs.hasAttribute(Attribute::Nest) &&
650 FAttrs.hasAttribute(Attribute::StructRet))), "Attributes "
651 "'byval, nest, and sret' are incompatible!", V);
653 Assert1(!((FAttrs.hasAttribute(Attribute::ByVal) &&
654 FAttrs.hasAttribute(Attribute::Nest)) ||
655 (FAttrs.hasAttribute(Attribute::ByVal) &&
656 FAttrs.hasAttribute(Attribute::InReg)) ||
657 (FAttrs.hasAttribute(Attribute::Nest) &&
658 FAttrs.hasAttribute(Attribute::InReg))), "Attributes "
659 "'byval, nest, and inreg' are incompatible!", V);
661 Assert1(!(FAttrs.hasAttribute(Attribute::ZExt) &&
662 FAttrs.hasAttribute(Attribute::SExt)), "Attributes "
663 "'zeroext and signext' are incompatible!", V);
665 Assert1(!(FAttrs.hasAttribute(Attribute::ReadNone) &&
666 FAttrs.hasAttribute(Attribute::ReadOnly)), "Attributes "
667 "'readnone and readonly' are incompatible!", V);
669 Assert1(!(FAttrs.hasAttribute(Attribute::NoInline) &&
670 FAttrs.hasAttribute(Attribute::AlwaysInline)), "Attributes "
671 "'noinline and alwaysinline' are incompatible!", V);
674 static bool VerifyAttributeCount(const AttributeSet &Attrs, unsigned Params) {
678 unsigned LastSlot = Attrs.getNumSlots() - 1;
679 unsigned LastIndex = Attrs.getSlot(LastSlot).Index;
680 if (LastIndex <= Params
681 || (LastIndex == (unsigned)~0
682 && (LastSlot == 0 || Attrs.getSlot(LastSlot - 1).Index <= Params)))
688 // visitFunction - Verify that a function is ok.
690 void Verifier::visitFunction(Function &F) {
691 // Check function arguments.
692 FunctionType *FT = F.getFunctionType();
693 unsigned NumArgs = F.arg_size();
695 Assert1(Context == &F.getContext(),
696 "Function context does not match Module context!", &F);
698 Assert1(!F.hasCommonLinkage(), "Functions may not have common linkage", &F);
699 Assert2(FT->getNumParams() == NumArgs,
700 "# formal arguments must match # of arguments for function type!",
702 Assert1(F.getReturnType()->isFirstClassType() ||
703 F.getReturnType()->isVoidTy() ||
704 F.getReturnType()->isStructTy(),
705 "Functions cannot return aggregate values!", &F);
707 Assert1(!F.hasStructRetAttr() || F.getReturnType()->isVoidTy(),
708 "Invalid struct return type!", &F);
710 const AttributeSet &Attrs = F.getAttributes();
712 Assert1(VerifyAttributeCount(Attrs, FT->getNumParams()),
713 "Attribute after last parameter!", &F);
715 // Check function attributes.
716 VerifyFunctionAttrs(FT, Attrs, &F);
718 // Check that this function meets the restrictions on this calling convention.
719 switch (F.getCallingConv()) {
724 case CallingConv::Fast:
725 case CallingConv::Cold:
726 case CallingConv::X86_FastCall:
727 case CallingConv::X86_ThisCall:
728 case CallingConv::Intel_OCL_BI:
729 case CallingConv::PTX_Kernel:
730 case CallingConv::PTX_Device:
731 Assert1(!F.isVarArg(),
732 "Varargs functions must have C calling conventions!", &F);
736 bool isLLVMdotName = F.getName().size() >= 5 &&
737 F.getName().substr(0, 5) == "llvm.";
739 // Check that the argument values match the function type for this function...
741 for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end();
743 Assert2(I->getType() == FT->getParamType(i),
744 "Argument value does not match function argument type!",
745 I, FT->getParamType(i));
746 Assert1(I->getType()->isFirstClassType(),
747 "Function arguments must have first-class types!", I);
749 Assert2(!I->getType()->isMetadataTy(),
750 "Function takes metadata but isn't an intrinsic", I, &F);
753 if (F.isMaterializable()) {
754 // Function has a body somewhere we can't see.
755 } else if (F.isDeclaration()) {
756 Assert1(F.hasExternalLinkage() || F.hasDLLImportLinkage() ||
757 F.hasExternalWeakLinkage(),
758 "invalid linkage type for function declaration", &F);
760 // Verify that this function (which has a body) is not named "llvm.*". It
761 // is not legal to define intrinsics.
762 Assert1(!isLLVMdotName, "llvm intrinsics cannot be defined!", &F);
764 // Check the entry node
765 BasicBlock *Entry = &F.getEntryBlock();
766 Assert1(pred_begin(Entry) == pred_end(Entry),
767 "Entry block to function must not have predecessors!", Entry);
769 // The address of the entry block cannot be taken, unless it is dead.
770 if (Entry->hasAddressTaken()) {
771 Assert1(!BlockAddress::get(Entry)->isConstantUsed(),
772 "blockaddress may not be used with the entry block!", Entry);
776 // If this function is actually an intrinsic, verify that it is only used in
777 // direct call/invokes, never having its "address taken".
778 if (F.getIntrinsicID()) {
780 if (F.hasAddressTaken(&U))
781 Assert1(0, "Invalid user of intrinsic instruction!", U);
785 // verifyBasicBlock - Verify that a basic block is well formed...
787 void Verifier::visitBasicBlock(BasicBlock &BB) {
788 InstsInThisBlock.clear();
790 // Ensure that basic blocks have terminators!
791 Assert1(BB.getTerminator(), "Basic Block does not have terminator!", &BB);
793 // Check constraints that this basic block imposes on all of the PHI nodes in
795 if (isa<PHINode>(BB.front())) {
796 SmallVector<BasicBlock*, 8> Preds(pred_begin(&BB), pred_end(&BB));
797 SmallVector<std::pair<BasicBlock*, Value*>, 8> Values;
798 std::sort(Preds.begin(), Preds.end());
800 for (BasicBlock::iterator I = BB.begin(); (PN = dyn_cast<PHINode>(I));++I) {
801 // Ensure that PHI nodes have at least one entry!
802 Assert1(PN->getNumIncomingValues() != 0,
803 "PHI nodes must have at least one entry. If the block is dead, "
804 "the PHI should be removed!", PN);
805 Assert1(PN->getNumIncomingValues() == Preds.size(),
806 "PHINode should have one entry for each predecessor of its "
807 "parent basic block!", PN);
809 // Get and sort all incoming values in the PHI node...
811 Values.reserve(PN->getNumIncomingValues());
812 for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i)
813 Values.push_back(std::make_pair(PN->getIncomingBlock(i),
814 PN->getIncomingValue(i)));
815 std::sort(Values.begin(), Values.end());
817 for (unsigned i = 0, e = Values.size(); i != e; ++i) {
818 // Check to make sure that if there is more than one entry for a
819 // particular basic block in this PHI node, that the incoming values are
822 Assert4(i == 0 || Values[i].first != Values[i-1].first ||
823 Values[i].second == Values[i-1].second,
824 "PHI node has multiple entries for the same basic block with "
825 "different incoming values!", PN, Values[i].first,
826 Values[i].second, Values[i-1].second);
828 // Check to make sure that the predecessors and PHI node entries are
830 Assert3(Values[i].first == Preds[i],
831 "PHI node entries do not match predecessors!", PN,
832 Values[i].first, Preds[i]);
838 void Verifier::visitTerminatorInst(TerminatorInst &I) {
839 // Ensure that terminators only exist at the end of the basic block.
840 Assert1(&I == I.getParent()->getTerminator(),
841 "Terminator found in the middle of a basic block!", I.getParent());
845 void Verifier::visitBranchInst(BranchInst &BI) {
846 if (BI.isConditional()) {
847 Assert2(BI.getCondition()->getType()->isIntegerTy(1),
848 "Branch condition is not 'i1' type!", &BI, BI.getCondition());
850 visitTerminatorInst(BI);
853 void Verifier::visitReturnInst(ReturnInst &RI) {
854 Function *F = RI.getParent()->getParent();
855 unsigned N = RI.getNumOperands();
856 if (F->getReturnType()->isVoidTy())
858 "Found return instr that returns non-void in Function of void "
859 "return type!", &RI, F->getReturnType());
861 Assert2(N == 1 && F->getReturnType() == RI.getOperand(0)->getType(),
862 "Function return type does not match operand "
863 "type of return inst!", &RI, F->getReturnType());
865 // Check to make sure that the return value has necessary properties for
867 visitTerminatorInst(RI);
870 void Verifier::visitSwitchInst(SwitchInst &SI) {
871 // Check to make sure that all of the constants in the switch instruction
872 // have the same type as the switched-on value.
873 Type *SwitchTy = SI.getCondition()->getType();
874 IntegerType *IntTy = cast<IntegerType>(SwitchTy);
875 IntegersSubsetToBB Mapping;
876 std::map<IntegersSubset::Range, unsigned> RangeSetMap;
877 for (SwitchInst::CaseIt i = SI.case_begin(), e = SI.case_end(); i != e; ++i) {
878 IntegersSubset CaseRanges = i.getCaseValueEx();
879 for (unsigned ri = 0, rie = CaseRanges.getNumItems(); ri < rie; ++ri) {
880 IntegersSubset::Range r = CaseRanges.getItem(ri);
881 Assert1(((const APInt&)r.getLow()).getBitWidth() == IntTy->getBitWidth(),
882 "Switch constants must all be same type as switch value!", &SI);
883 Assert1(((const APInt&)r.getHigh()).getBitWidth() == IntTy->getBitWidth(),
884 "Switch constants must all be same type as switch value!", &SI);
886 RangeSetMap[r] = i.getCaseIndex();
890 IntegersSubsetToBB::RangeIterator errItem;
891 if (!Mapping.verify(errItem)) {
892 unsigned CaseIndex = RangeSetMap[errItem->first];
893 SwitchInst::CaseIt i(&SI, CaseIndex);
894 Assert2(false, "Duplicate integer as switch case", &SI, i.getCaseValueEx());
897 visitTerminatorInst(SI);
900 void Verifier::visitIndirectBrInst(IndirectBrInst &BI) {
901 Assert1(BI.getAddress()->getType()->isPointerTy(),
902 "Indirectbr operand must have pointer type!", &BI);
903 for (unsigned i = 0, e = BI.getNumDestinations(); i != e; ++i)
904 Assert1(BI.getDestination(i)->getType()->isLabelTy(),
905 "Indirectbr destinations must all have pointer type!", &BI);
907 visitTerminatorInst(BI);
910 void Verifier::visitSelectInst(SelectInst &SI) {
911 Assert1(!SelectInst::areInvalidOperands(SI.getOperand(0), SI.getOperand(1),
913 "Invalid operands for select instruction!", &SI);
915 Assert1(SI.getTrueValue()->getType() == SI.getType(),
916 "Select values must have same type as select instruction!", &SI);
917 visitInstruction(SI);
920 /// visitUserOp1 - User defined operators shouldn't live beyond the lifetime of
921 /// a pass, if any exist, it's an error.
923 void Verifier::visitUserOp1(Instruction &I) {
924 Assert1(0, "User-defined operators should not live outside of a pass!", &I);
927 void Verifier::visitTruncInst(TruncInst &I) {
928 // Get the source and destination types
929 Type *SrcTy = I.getOperand(0)->getType();
930 Type *DestTy = I.getType();
932 // Get the size of the types in bits, we'll need this later
933 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
934 unsigned DestBitSize = DestTy->getScalarSizeInBits();
936 Assert1(SrcTy->isIntOrIntVectorTy(), "Trunc only operates on integer", &I);
937 Assert1(DestTy->isIntOrIntVectorTy(), "Trunc only produces integer", &I);
938 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
939 "trunc source and destination must both be a vector or neither", &I);
940 Assert1(SrcBitSize > DestBitSize,"DestTy too big for Trunc", &I);
945 void Verifier::visitZExtInst(ZExtInst &I) {
946 // Get the source and destination types
947 Type *SrcTy = I.getOperand(0)->getType();
948 Type *DestTy = I.getType();
950 // Get the size of the types in bits, we'll need this later
951 Assert1(SrcTy->isIntOrIntVectorTy(), "ZExt only operates on integer", &I);
952 Assert1(DestTy->isIntOrIntVectorTy(), "ZExt only produces an integer", &I);
953 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
954 "zext source and destination must both be a vector or neither", &I);
955 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
956 unsigned DestBitSize = DestTy->getScalarSizeInBits();
958 Assert1(SrcBitSize < DestBitSize,"Type too small for ZExt", &I);
963 void Verifier::visitSExtInst(SExtInst &I) {
964 // Get the source and destination types
965 Type *SrcTy = I.getOperand(0)->getType();
966 Type *DestTy = I.getType();
968 // Get the size of the types in bits, we'll need this later
969 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
970 unsigned DestBitSize = DestTy->getScalarSizeInBits();
972 Assert1(SrcTy->isIntOrIntVectorTy(), "SExt only operates on integer", &I);
973 Assert1(DestTy->isIntOrIntVectorTy(), "SExt only produces an integer", &I);
974 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
975 "sext source and destination must both be a vector or neither", &I);
976 Assert1(SrcBitSize < DestBitSize,"Type too small for SExt", &I);
981 void Verifier::visitFPTruncInst(FPTruncInst &I) {
982 // Get the source and destination types
983 Type *SrcTy = I.getOperand(0)->getType();
984 Type *DestTy = I.getType();
985 // Get the size of the types in bits, we'll need this later
986 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
987 unsigned DestBitSize = DestTy->getScalarSizeInBits();
989 Assert1(SrcTy->isFPOrFPVectorTy(),"FPTrunc only operates on FP", &I);
990 Assert1(DestTy->isFPOrFPVectorTy(),"FPTrunc only produces an FP", &I);
991 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
992 "fptrunc source and destination must both be a vector or neither",&I);
993 Assert1(SrcBitSize > DestBitSize,"DestTy too big for FPTrunc", &I);
998 void Verifier::visitFPExtInst(FPExtInst &I) {
999 // Get the source and destination types
1000 Type *SrcTy = I.getOperand(0)->getType();
1001 Type *DestTy = I.getType();
1003 // Get the size of the types in bits, we'll need this later
1004 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
1005 unsigned DestBitSize = DestTy->getScalarSizeInBits();
1007 Assert1(SrcTy->isFPOrFPVectorTy(),"FPExt only operates on FP", &I);
1008 Assert1(DestTy->isFPOrFPVectorTy(),"FPExt only produces an FP", &I);
1009 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1010 "fpext source and destination must both be a vector or neither", &I);
1011 Assert1(SrcBitSize < DestBitSize,"DestTy too small for FPExt", &I);
1013 visitInstruction(I);
1016 void Verifier::visitUIToFPInst(UIToFPInst &I) {
1017 // Get the source and destination types
1018 Type *SrcTy = I.getOperand(0)->getType();
1019 Type *DestTy = I.getType();
1021 bool SrcVec = SrcTy->isVectorTy();
1022 bool DstVec = DestTy->isVectorTy();
1024 Assert1(SrcVec == DstVec,
1025 "UIToFP source and dest must both be vector or scalar", &I);
1026 Assert1(SrcTy->isIntOrIntVectorTy(),
1027 "UIToFP source must be integer or integer vector", &I);
1028 Assert1(DestTy->isFPOrFPVectorTy(),
1029 "UIToFP result must be FP or FP vector", &I);
1031 if (SrcVec && DstVec)
1032 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1033 cast<VectorType>(DestTy)->getNumElements(),
1034 "UIToFP source and dest vector length mismatch", &I);
1036 visitInstruction(I);
1039 void Verifier::visitSIToFPInst(SIToFPInst &I) {
1040 // Get the source and destination types
1041 Type *SrcTy = I.getOperand(0)->getType();
1042 Type *DestTy = I.getType();
1044 bool SrcVec = SrcTy->isVectorTy();
1045 bool DstVec = DestTy->isVectorTy();
1047 Assert1(SrcVec == DstVec,
1048 "SIToFP source and dest must both be vector or scalar", &I);
1049 Assert1(SrcTy->isIntOrIntVectorTy(),
1050 "SIToFP source must be integer or integer vector", &I);
1051 Assert1(DestTy->isFPOrFPVectorTy(),
1052 "SIToFP result must be FP or FP vector", &I);
1054 if (SrcVec && DstVec)
1055 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1056 cast<VectorType>(DestTy)->getNumElements(),
1057 "SIToFP source and dest vector length mismatch", &I);
1059 visitInstruction(I);
1062 void Verifier::visitFPToUIInst(FPToUIInst &I) {
1063 // Get the source and destination types
1064 Type *SrcTy = I.getOperand(0)->getType();
1065 Type *DestTy = I.getType();
1067 bool SrcVec = SrcTy->isVectorTy();
1068 bool DstVec = DestTy->isVectorTy();
1070 Assert1(SrcVec == DstVec,
1071 "FPToUI source and dest must both be vector or scalar", &I);
1072 Assert1(SrcTy->isFPOrFPVectorTy(), "FPToUI source must be FP or FP vector",
1074 Assert1(DestTy->isIntOrIntVectorTy(),
1075 "FPToUI result must be integer or integer vector", &I);
1077 if (SrcVec && DstVec)
1078 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1079 cast<VectorType>(DestTy)->getNumElements(),
1080 "FPToUI source and dest vector length mismatch", &I);
1082 visitInstruction(I);
1085 void Verifier::visitFPToSIInst(FPToSIInst &I) {
1086 // Get the source and destination types
1087 Type *SrcTy = I.getOperand(0)->getType();
1088 Type *DestTy = I.getType();
1090 bool SrcVec = SrcTy->isVectorTy();
1091 bool DstVec = DestTy->isVectorTy();
1093 Assert1(SrcVec == DstVec,
1094 "FPToSI source and dest must both be vector or scalar", &I);
1095 Assert1(SrcTy->isFPOrFPVectorTy(),
1096 "FPToSI source must be FP or FP vector", &I);
1097 Assert1(DestTy->isIntOrIntVectorTy(),
1098 "FPToSI result must be integer or integer vector", &I);
1100 if (SrcVec && DstVec)
1101 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1102 cast<VectorType>(DestTy)->getNumElements(),
1103 "FPToSI source and dest vector length mismatch", &I);
1105 visitInstruction(I);
1108 void Verifier::visitPtrToIntInst(PtrToIntInst &I) {
1109 // Get the source and destination types
1110 Type *SrcTy = I.getOperand(0)->getType();
1111 Type *DestTy = I.getType();
1113 Assert1(SrcTy->getScalarType()->isPointerTy(),
1114 "PtrToInt source must be pointer", &I);
1115 Assert1(DestTy->getScalarType()->isIntegerTy(),
1116 "PtrToInt result must be integral", &I);
1117 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1118 "PtrToInt type mismatch", &I);
1120 if (SrcTy->isVectorTy()) {
1121 VectorType *VSrc = dyn_cast<VectorType>(SrcTy);
1122 VectorType *VDest = dyn_cast<VectorType>(DestTy);
1123 Assert1(VSrc->getNumElements() == VDest->getNumElements(),
1124 "PtrToInt Vector width mismatch", &I);
1127 visitInstruction(I);
1130 void Verifier::visitIntToPtrInst(IntToPtrInst &I) {
1131 // Get the source and destination types
1132 Type *SrcTy = I.getOperand(0)->getType();
1133 Type *DestTy = I.getType();
1135 Assert1(SrcTy->getScalarType()->isIntegerTy(),
1136 "IntToPtr source must be an integral", &I);
1137 Assert1(DestTy->getScalarType()->isPointerTy(),
1138 "IntToPtr result must be a pointer",&I);
1139 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1140 "IntToPtr type mismatch", &I);
1141 if (SrcTy->isVectorTy()) {
1142 VectorType *VSrc = dyn_cast<VectorType>(SrcTy);
1143 VectorType *VDest = dyn_cast<VectorType>(DestTy);
1144 Assert1(VSrc->getNumElements() == VDest->getNumElements(),
1145 "IntToPtr Vector width mismatch", &I);
1147 visitInstruction(I);
1150 void Verifier::visitBitCastInst(BitCastInst &I) {
1151 // Get the source and destination types
1152 Type *SrcTy = I.getOperand(0)->getType();
1153 Type *DestTy = I.getType();
1155 // Get the size of the types in bits, we'll need this later
1156 unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
1157 unsigned DestBitSize = DestTy->getPrimitiveSizeInBits();
1159 // BitCast implies a no-op cast of type only. No bits change.
1160 // However, you can't cast pointers to anything but pointers.
1161 Assert1(SrcTy->isPointerTy() == DestTy->isPointerTy(),
1162 "Bitcast requires both operands to be pointer or neither", &I);
1163 Assert1(SrcBitSize == DestBitSize, "Bitcast requires types of same width",&I);
1165 // Disallow aggregates.
1166 Assert1(!SrcTy->isAggregateType(),
1167 "Bitcast operand must not be aggregate", &I);
1168 Assert1(!DestTy->isAggregateType(),
1169 "Bitcast type must not be aggregate", &I);
1171 visitInstruction(I);
1174 /// visitPHINode - Ensure that a PHI node is well formed.
1176 void Verifier::visitPHINode(PHINode &PN) {
1177 // Ensure that the PHI nodes are all grouped together at the top of the block.
1178 // This can be tested by checking whether the instruction before this is
1179 // either nonexistent (because this is begin()) or is a PHI node. If not,
1180 // then there is some other instruction before a PHI.
1181 Assert2(&PN == &PN.getParent()->front() ||
1182 isa<PHINode>(--BasicBlock::iterator(&PN)),
1183 "PHI nodes not grouped at top of basic block!",
1184 &PN, PN.getParent());
1186 // Check that all of the values of the PHI node have the same type as the
1187 // result, and that the incoming blocks are really basic blocks.
1188 for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i) {
1189 Assert1(PN.getType() == PN.getIncomingValue(i)->getType(),
1190 "PHI node operands are not the same type as the result!", &PN);
1193 // All other PHI node constraints are checked in the visitBasicBlock method.
1195 visitInstruction(PN);
1198 void Verifier::VerifyCallSite(CallSite CS) {
1199 Instruction *I = CS.getInstruction();
1201 Assert1(CS.getCalledValue()->getType()->isPointerTy(),
1202 "Called function must be a pointer!", I);
1203 PointerType *FPTy = cast<PointerType>(CS.getCalledValue()->getType());
1205 Assert1(FPTy->getElementType()->isFunctionTy(),
1206 "Called function is not pointer to function type!", I);
1207 FunctionType *FTy = cast<FunctionType>(FPTy->getElementType());
1209 // Verify that the correct number of arguments are being passed
1210 if (FTy->isVarArg())
1211 Assert1(CS.arg_size() >= FTy->getNumParams(),
1212 "Called function requires more parameters than were provided!",I);
1214 Assert1(CS.arg_size() == FTy->getNumParams(),
1215 "Incorrect number of arguments passed to called function!", I);
1217 // Verify that all arguments to the call match the function type.
1218 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
1219 Assert3(CS.getArgument(i)->getType() == FTy->getParamType(i),
1220 "Call parameter type does not match function signature!",
1221 CS.getArgument(i), FTy->getParamType(i), I);
1223 const AttributeSet &Attrs = CS.getAttributes();
1225 Assert1(VerifyAttributeCount(Attrs, CS.arg_size()),
1226 "Attribute after last parameter!", I);
1228 // Verify call attributes.
1229 VerifyFunctionAttrs(FTy, Attrs, I);
1231 if (FTy->isVarArg())
1232 // Check attributes on the varargs part.
1233 for (unsigned Idx = 1 + FTy->getNumParams(); Idx <= CS.arg_size(); ++Idx) {
1234 Attribute Attr = Attrs.getParamAttributes(Idx);
1236 VerifyParameterAttrs(Attr, CS.getArgument(Idx-1)->getType(), false, I);
1238 Assert1(!Attr.hasAttribute(Attribute::StructRet),
1239 "Attribute 'sret' cannot be used for vararg call arguments!", I);
1242 // Verify that there's no metadata unless it's a direct call to an intrinsic.
1243 if (CS.getCalledFunction() == 0 ||
1244 !CS.getCalledFunction()->getName().startswith("llvm.")) {
1245 for (FunctionType::param_iterator PI = FTy->param_begin(),
1246 PE = FTy->param_end(); PI != PE; ++PI)
1247 Assert1(!(*PI)->isMetadataTy(),
1248 "Function has metadata parameter but isn't an intrinsic", I);
1251 visitInstruction(*I);
1254 void Verifier::visitCallInst(CallInst &CI) {
1255 VerifyCallSite(&CI);
1257 if (Function *F = CI.getCalledFunction())
1258 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
1259 visitIntrinsicFunctionCall(ID, CI);
1262 void Verifier::visitInvokeInst(InvokeInst &II) {
1263 VerifyCallSite(&II);
1265 // Verify that there is a landingpad instruction as the first non-PHI
1266 // instruction of the 'unwind' destination.
1267 Assert1(II.getUnwindDest()->isLandingPad(),
1268 "The unwind destination does not have a landingpad instruction!",&II);
1270 visitTerminatorInst(II);
1273 /// visitBinaryOperator - Check that both arguments to the binary operator are
1274 /// of the same type!
1276 void Verifier::visitBinaryOperator(BinaryOperator &B) {
1277 Assert1(B.getOperand(0)->getType() == B.getOperand(1)->getType(),
1278 "Both operands to a binary operator are not of the same type!", &B);
1280 switch (B.getOpcode()) {
1281 // Check that integer arithmetic operators are only used with
1282 // integral operands.
1283 case Instruction::Add:
1284 case Instruction::Sub:
1285 case Instruction::Mul:
1286 case Instruction::SDiv:
1287 case Instruction::UDiv:
1288 case Instruction::SRem:
1289 case Instruction::URem:
1290 Assert1(B.getType()->isIntOrIntVectorTy(),
1291 "Integer arithmetic operators only work with integral types!", &B);
1292 Assert1(B.getType() == B.getOperand(0)->getType(),
1293 "Integer arithmetic operators must have same type "
1294 "for operands and result!", &B);
1296 // Check that floating-point arithmetic operators are only used with
1297 // floating-point operands.
1298 case Instruction::FAdd:
1299 case Instruction::FSub:
1300 case Instruction::FMul:
1301 case Instruction::FDiv:
1302 case Instruction::FRem:
1303 Assert1(B.getType()->isFPOrFPVectorTy(),
1304 "Floating-point arithmetic operators only work with "
1305 "floating-point types!", &B);
1306 Assert1(B.getType() == B.getOperand(0)->getType(),
1307 "Floating-point arithmetic operators must have same type "
1308 "for operands and result!", &B);
1310 // Check that logical operators are only used with integral operands.
1311 case Instruction::And:
1312 case Instruction::Or:
1313 case Instruction::Xor:
1314 Assert1(B.getType()->isIntOrIntVectorTy(),
1315 "Logical operators only work with integral types!", &B);
1316 Assert1(B.getType() == B.getOperand(0)->getType(),
1317 "Logical operators must have same type for operands and result!",
1320 case Instruction::Shl:
1321 case Instruction::LShr:
1322 case Instruction::AShr:
1323 Assert1(B.getType()->isIntOrIntVectorTy(),
1324 "Shifts only work with integral types!", &B);
1325 Assert1(B.getType() == B.getOperand(0)->getType(),
1326 "Shift return type must be same as operands!", &B);
1329 llvm_unreachable("Unknown BinaryOperator opcode!");
1332 visitInstruction(B);
1335 void Verifier::visitICmpInst(ICmpInst &IC) {
1336 // Check that the operands are the same type
1337 Type *Op0Ty = IC.getOperand(0)->getType();
1338 Type *Op1Ty = IC.getOperand(1)->getType();
1339 Assert1(Op0Ty == Op1Ty,
1340 "Both operands to ICmp instruction are not of the same type!", &IC);
1341 // Check that the operands are the right type
1342 Assert1(Op0Ty->isIntOrIntVectorTy() || Op0Ty->getScalarType()->isPointerTy(),
1343 "Invalid operand types for ICmp instruction", &IC);
1344 // Check that the predicate is valid.
1345 Assert1(IC.getPredicate() >= CmpInst::FIRST_ICMP_PREDICATE &&
1346 IC.getPredicate() <= CmpInst::LAST_ICMP_PREDICATE,
1347 "Invalid predicate in ICmp instruction!", &IC);
1349 visitInstruction(IC);
1352 void Verifier::visitFCmpInst(FCmpInst &FC) {
1353 // Check that the operands are the same type
1354 Type *Op0Ty = FC.getOperand(0)->getType();
1355 Type *Op1Ty = FC.getOperand(1)->getType();
1356 Assert1(Op0Ty == Op1Ty,
1357 "Both operands to FCmp instruction are not of the same type!", &FC);
1358 // Check that the operands are the right type
1359 Assert1(Op0Ty->isFPOrFPVectorTy(),
1360 "Invalid operand types for FCmp instruction", &FC);
1361 // Check that the predicate is valid.
1362 Assert1(FC.getPredicate() >= CmpInst::FIRST_FCMP_PREDICATE &&
1363 FC.getPredicate() <= CmpInst::LAST_FCMP_PREDICATE,
1364 "Invalid predicate in FCmp instruction!", &FC);
1366 visitInstruction(FC);
1369 void Verifier::visitExtractElementInst(ExtractElementInst &EI) {
1370 Assert1(ExtractElementInst::isValidOperands(EI.getOperand(0),
1372 "Invalid extractelement operands!", &EI);
1373 visitInstruction(EI);
1376 void Verifier::visitInsertElementInst(InsertElementInst &IE) {
1377 Assert1(InsertElementInst::isValidOperands(IE.getOperand(0),
1380 "Invalid insertelement operands!", &IE);
1381 visitInstruction(IE);
1384 void Verifier::visitShuffleVectorInst(ShuffleVectorInst &SV) {
1385 Assert1(ShuffleVectorInst::isValidOperands(SV.getOperand(0), SV.getOperand(1),
1387 "Invalid shufflevector operands!", &SV);
1388 visitInstruction(SV);
1391 void Verifier::visitGetElementPtrInst(GetElementPtrInst &GEP) {
1392 Type *TargetTy = GEP.getPointerOperandType()->getScalarType();
1394 Assert1(isa<PointerType>(TargetTy),
1395 "GEP base pointer is not a vector or a vector of pointers", &GEP);
1396 Assert1(cast<PointerType>(TargetTy)->getElementType()->isSized(),
1397 "GEP into unsized type!", &GEP);
1398 Assert1(GEP.getPointerOperandType()->isVectorTy() ==
1399 GEP.getType()->isVectorTy(), "Vector GEP must return a vector value",
1402 SmallVector<Value*, 16> Idxs(GEP.idx_begin(), GEP.idx_end());
1404 GetElementPtrInst::getIndexedType(GEP.getPointerOperandType(), Idxs);
1405 Assert1(ElTy, "Invalid indices for GEP pointer type!", &GEP);
1407 Assert2(GEP.getType()->getScalarType()->isPointerTy() &&
1408 cast<PointerType>(GEP.getType()->getScalarType())->getElementType()
1409 == ElTy, "GEP is not of right type for indices!", &GEP, ElTy);
1411 if (GEP.getPointerOperandType()->isVectorTy()) {
1412 // Additional checks for vector GEPs.
1413 unsigned GepWidth = GEP.getPointerOperandType()->getVectorNumElements();
1414 Assert1(GepWidth == GEP.getType()->getVectorNumElements(),
1415 "Vector GEP result width doesn't match operand's", &GEP);
1416 for (unsigned i = 0, e = Idxs.size(); i != e; ++i) {
1417 Type *IndexTy = Idxs[i]->getType();
1418 Assert1(IndexTy->isVectorTy(),
1419 "Vector GEP must have vector indices!", &GEP);
1420 unsigned IndexWidth = IndexTy->getVectorNumElements();
1421 Assert1(IndexWidth == GepWidth, "Invalid GEP index vector width", &GEP);
1424 visitInstruction(GEP);
1427 static bool isContiguous(const ConstantRange &A, const ConstantRange &B) {
1428 return A.getUpper() == B.getLower() || A.getLower() == B.getUpper();
1431 void Verifier::visitLoadInst(LoadInst &LI) {
1432 PointerType *PTy = dyn_cast<PointerType>(LI.getOperand(0)->getType());
1433 Assert1(PTy, "Load operand must be a pointer.", &LI);
1434 Type *ElTy = PTy->getElementType();
1435 Assert2(ElTy == LI.getType(),
1436 "Load result type does not match pointer operand type!", &LI, ElTy);
1437 if (LI.isAtomic()) {
1438 Assert1(LI.getOrdering() != Release && LI.getOrdering() != AcquireRelease,
1439 "Load cannot have Release ordering", &LI);
1440 Assert1(LI.getAlignment() != 0,
1441 "Atomic load must specify explicit alignment", &LI);
1442 if (!ElTy->isPointerTy()) {
1443 Assert2(ElTy->isIntegerTy(),
1444 "atomic store operand must have integer type!",
1446 unsigned Size = ElTy->getPrimitiveSizeInBits();
1447 Assert2(Size >= 8 && !(Size & (Size - 1)),
1448 "atomic store operand must be power-of-two byte-sized integer",
1452 Assert1(LI.getSynchScope() == CrossThread,
1453 "Non-atomic load cannot have SynchronizationScope specified", &LI);
1456 if (MDNode *Range = LI.getMetadata(LLVMContext::MD_range)) {
1457 unsigned NumOperands = Range->getNumOperands();
1458 Assert1(NumOperands % 2 == 0, "Unfinished range!", Range);
1459 unsigned NumRanges = NumOperands / 2;
1460 Assert1(NumRanges >= 1, "It should have at least one range!", Range);
1462 ConstantRange LastRange(1); // Dummy initial value
1463 for (unsigned i = 0; i < NumRanges; ++i) {
1464 ConstantInt *Low = dyn_cast<ConstantInt>(Range->getOperand(2*i));
1465 Assert1(Low, "The lower limit must be an integer!", Low);
1466 ConstantInt *High = dyn_cast<ConstantInt>(Range->getOperand(2*i + 1));
1467 Assert1(High, "The upper limit must be an integer!", High);
1468 Assert1(High->getType() == Low->getType() &&
1469 High->getType() == ElTy, "Range types must match load type!",
1472 APInt HighV = High->getValue();
1473 APInt LowV = Low->getValue();
1474 ConstantRange CurRange(LowV, HighV);
1475 Assert1(!CurRange.isEmptySet() && !CurRange.isFullSet(),
1476 "Range must not be empty!", Range);
1478 Assert1(CurRange.intersectWith(LastRange).isEmptySet(),
1479 "Intervals are overlapping", Range);
1480 Assert1(LowV.sgt(LastRange.getLower()), "Intervals are not in order",
1482 Assert1(!isContiguous(CurRange, LastRange), "Intervals are contiguous",
1485 LastRange = ConstantRange(LowV, HighV);
1487 if (NumRanges > 2) {
1489 dyn_cast<ConstantInt>(Range->getOperand(0))->getValue();
1491 dyn_cast<ConstantInt>(Range->getOperand(1))->getValue();
1492 ConstantRange FirstRange(FirstLow, FirstHigh);
1493 Assert1(FirstRange.intersectWith(LastRange).isEmptySet(),
1494 "Intervals are overlapping", Range);
1495 Assert1(!isContiguous(FirstRange, LastRange), "Intervals are contiguous",
1502 visitInstruction(LI);
1505 void Verifier::visitStoreInst(StoreInst &SI) {
1506 PointerType *PTy = dyn_cast<PointerType>(SI.getOperand(1)->getType());
1507 Assert1(PTy, "Store operand must be a pointer.", &SI);
1508 Type *ElTy = PTy->getElementType();
1509 Assert2(ElTy == SI.getOperand(0)->getType(),
1510 "Stored value type does not match pointer operand type!",
1512 if (SI.isAtomic()) {
1513 Assert1(SI.getOrdering() != Acquire && SI.getOrdering() != AcquireRelease,
1514 "Store cannot have Acquire ordering", &SI);
1515 Assert1(SI.getAlignment() != 0,
1516 "Atomic store must specify explicit alignment", &SI);
1517 if (!ElTy->isPointerTy()) {
1518 Assert2(ElTy->isIntegerTy(),
1519 "atomic store operand must have integer type!",
1521 unsigned Size = ElTy->getPrimitiveSizeInBits();
1522 Assert2(Size >= 8 && !(Size & (Size - 1)),
1523 "atomic store operand must be power-of-two byte-sized integer",
1527 Assert1(SI.getSynchScope() == CrossThread,
1528 "Non-atomic store cannot have SynchronizationScope specified", &SI);
1530 visitInstruction(SI);
1533 void Verifier::visitAllocaInst(AllocaInst &AI) {
1534 PointerType *PTy = AI.getType();
1535 Assert1(PTy->getAddressSpace() == 0,
1536 "Allocation instruction pointer not in the generic address space!",
1538 Assert1(PTy->getElementType()->isSized(), "Cannot allocate unsized type",
1540 Assert1(AI.getArraySize()->getType()->isIntegerTy(),
1541 "Alloca array size must have integer type", &AI);
1542 visitInstruction(AI);
1545 void Verifier::visitAtomicCmpXchgInst(AtomicCmpXchgInst &CXI) {
1546 Assert1(CXI.getOrdering() != NotAtomic,
1547 "cmpxchg instructions must be atomic.", &CXI);
1548 Assert1(CXI.getOrdering() != Unordered,
1549 "cmpxchg instructions cannot be unordered.", &CXI);
1550 PointerType *PTy = dyn_cast<PointerType>(CXI.getOperand(0)->getType());
1551 Assert1(PTy, "First cmpxchg operand must be a pointer.", &CXI);
1552 Type *ElTy = PTy->getElementType();
1553 Assert2(ElTy->isIntegerTy(),
1554 "cmpxchg operand must have integer type!",
1556 unsigned Size = ElTy->getPrimitiveSizeInBits();
1557 Assert2(Size >= 8 && !(Size & (Size - 1)),
1558 "cmpxchg operand must be power-of-two byte-sized integer",
1560 Assert2(ElTy == CXI.getOperand(1)->getType(),
1561 "Expected value type does not match pointer operand type!",
1563 Assert2(ElTy == CXI.getOperand(2)->getType(),
1564 "Stored value type does not match pointer operand type!",
1566 visitInstruction(CXI);
1569 void Verifier::visitAtomicRMWInst(AtomicRMWInst &RMWI) {
1570 Assert1(RMWI.getOrdering() != NotAtomic,
1571 "atomicrmw instructions must be atomic.", &RMWI);
1572 Assert1(RMWI.getOrdering() != Unordered,
1573 "atomicrmw instructions cannot be unordered.", &RMWI);
1574 PointerType *PTy = dyn_cast<PointerType>(RMWI.getOperand(0)->getType());
1575 Assert1(PTy, "First atomicrmw operand must be a pointer.", &RMWI);
1576 Type *ElTy = PTy->getElementType();
1577 Assert2(ElTy->isIntegerTy(),
1578 "atomicrmw operand must have integer type!",
1580 unsigned Size = ElTy->getPrimitiveSizeInBits();
1581 Assert2(Size >= 8 && !(Size & (Size - 1)),
1582 "atomicrmw operand must be power-of-two byte-sized integer",
1584 Assert2(ElTy == RMWI.getOperand(1)->getType(),
1585 "Argument value type does not match pointer operand type!",
1587 Assert1(AtomicRMWInst::FIRST_BINOP <= RMWI.getOperation() &&
1588 RMWI.getOperation() <= AtomicRMWInst::LAST_BINOP,
1589 "Invalid binary operation!", &RMWI);
1590 visitInstruction(RMWI);
1593 void Verifier::visitFenceInst(FenceInst &FI) {
1594 const AtomicOrdering Ordering = FI.getOrdering();
1595 Assert1(Ordering == Acquire || Ordering == Release ||
1596 Ordering == AcquireRelease || Ordering == SequentiallyConsistent,
1597 "fence instructions may only have "
1598 "acquire, release, acq_rel, or seq_cst ordering.", &FI);
1599 visitInstruction(FI);
1602 void Verifier::visitExtractValueInst(ExtractValueInst &EVI) {
1603 Assert1(ExtractValueInst::getIndexedType(EVI.getAggregateOperand()->getType(),
1604 EVI.getIndices()) ==
1606 "Invalid ExtractValueInst operands!", &EVI);
1608 visitInstruction(EVI);
1611 void Verifier::visitInsertValueInst(InsertValueInst &IVI) {
1612 Assert1(ExtractValueInst::getIndexedType(IVI.getAggregateOperand()->getType(),
1613 IVI.getIndices()) ==
1614 IVI.getOperand(1)->getType(),
1615 "Invalid InsertValueInst operands!", &IVI);
1617 visitInstruction(IVI);
1620 void Verifier::visitLandingPadInst(LandingPadInst &LPI) {
1621 BasicBlock *BB = LPI.getParent();
1623 // The landingpad instruction is ill-formed if it doesn't have any clauses and
1625 Assert1(LPI.getNumClauses() > 0 || LPI.isCleanup(),
1626 "LandingPadInst needs at least one clause or to be a cleanup.", &LPI);
1628 // The landingpad instruction defines its parent as a landing pad block. The
1629 // landing pad block may be branched to only by the unwind edge of an invoke.
1630 for (pred_iterator I = pred_begin(BB), E = pred_end(BB); I != E; ++I) {
1631 const InvokeInst *II = dyn_cast<InvokeInst>((*I)->getTerminator());
1632 Assert1(II && II->getUnwindDest() == BB && II->getNormalDest() != BB,
1633 "Block containing LandingPadInst must be jumped to "
1634 "only by the unwind edge of an invoke.", &LPI);
1637 // The landingpad instruction must be the first non-PHI instruction in the
1639 Assert1(LPI.getParent()->getLandingPadInst() == &LPI,
1640 "LandingPadInst not the first non-PHI instruction in the block.",
1643 // The personality functions for all landingpad instructions within the same
1644 // function should match.
1646 Assert1(LPI.getPersonalityFn() == PersonalityFn,
1647 "Personality function doesn't match others in function", &LPI);
1648 PersonalityFn = LPI.getPersonalityFn();
1650 // All operands must be constants.
1651 Assert1(isa<Constant>(PersonalityFn), "Personality function is not constant!",
1653 for (unsigned i = 0, e = LPI.getNumClauses(); i < e; ++i) {
1654 Value *Clause = LPI.getClause(i);
1655 Assert1(isa<Constant>(Clause), "Clause is not constant!", &LPI);
1656 if (LPI.isCatch(i)) {
1657 Assert1(isa<PointerType>(Clause->getType()),
1658 "Catch operand does not have pointer type!", &LPI);
1660 Assert1(LPI.isFilter(i), "Clause is neither catch nor filter!", &LPI);
1661 Assert1(isa<ConstantArray>(Clause) || isa<ConstantAggregateZero>(Clause),
1662 "Filter operand is not an array of constants!", &LPI);
1666 visitInstruction(LPI);
1669 void Verifier::verifyDominatesUse(Instruction &I, unsigned i) {
1670 Instruction *Op = cast<Instruction>(I.getOperand(i));
1671 // If the we have an invalid invoke, don't try to compute the dominance.
1672 // We already reject it in the invoke specific checks and the dominance
1673 // computation doesn't handle multiple edges.
1674 if (InvokeInst *II = dyn_cast<InvokeInst>(Op)) {
1675 if (II->getNormalDest() == II->getUnwindDest())
1679 const Use &U = I.getOperandUse(i);
1680 Assert2(InstsInThisBlock.count(Op) || DT->dominates(Op, U),
1681 "Instruction does not dominate all uses!", Op, &I);
1684 /// verifyInstruction - Verify that an instruction is well formed.
1686 void Verifier::visitInstruction(Instruction &I) {
1687 BasicBlock *BB = I.getParent();
1688 Assert1(BB, "Instruction not embedded in basic block!", &I);
1690 if (!isa<PHINode>(I)) { // Check that non-phi nodes are not self referential
1691 for (Value::use_iterator UI = I.use_begin(), UE = I.use_end();
1693 Assert1(*UI != (User*)&I || !DT->isReachableFromEntry(BB),
1694 "Only PHI nodes may reference their own value!", &I);
1697 // Check that void typed values don't have names
1698 Assert1(!I.getType()->isVoidTy() || !I.hasName(),
1699 "Instruction has a name, but provides a void value!", &I);
1701 // Check that the return value of the instruction is either void or a legal
1703 Assert1(I.getType()->isVoidTy() ||
1704 I.getType()->isFirstClassType(),
1705 "Instruction returns a non-scalar type!", &I);
1707 // Check that the instruction doesn't produce metadata. Calls are already
1708 // checked against the callee type.
1709 Assert1(!I.getType()->isMetadataTy() ||
1710 isa<CallInst>(I) || isa<InvokeInst>(I),
1711 "Invalid use of metadata!", &I);
1713 // Check that all uses of the instruction, if they are instructions
1714 // themselves, actually have parent basic blocks. If the use is not an
1715 // instruction, it is an error!
1716 for (User::use_iterator UI = I.use_begin(), UE = I.use_end();
1718 if (Instruction *Used = dyn_cast<Instruction>(*UI))
1719 Assert2(Used->getParent() != 0, "Instruction referencing instruction not"
1720 " embedded in a basic block!", &I, Used);
1722 CheckFailed("Use of instruction is not an instruction!", *UI);
1727 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
1728 Assert1(I.getOperand(i) != 0, "Instruction has null operand!", &I);
1730 // Check to make sure that only first-class-values are operands to
1732 if (!I.getOperand(i)->getType()->isFirstClassType()) {
1733 Assert1(0, "Instruction operands must be first-class values!", &I);
1736 if (Function *F = dyn_cast<Function>(I.getOperand(i))) {
1737 // Check to make sure that the "address of" an intrinsic function is never
1739 Assert1(!F->isIntrinsic() || i == (isa<CallInst>(I) ? e-1 : 0),
1740 "Cannot take the address of an intrinsic!", &I);
1741 Assert1(!F->isIntrinsic() || isa<CallInst>(I) ||
1742 F->getIntrinsicID() == Intrinsic::donothing,
1743 "Cannot invoke an intrinsinc other than donothing", &I);
1744 Assert1(F->getParent() == Mod, "Referencing function in another module!",
1746 } else if (BasicBlock *OpBB = dyn_cast<BasicBlock>(I.getOperand(i))) {
1747 Assert1(OpBB->getParent() == BB->getParent(),
1748 "Referring to a basic block in another function!", &I);
1749 } else if (Argument *OpArg = dyn_cast<Argument>(I.getOperand(i))) {
1750 Assert1(OpArg->getParent() == BB->getParent(),
1751 "Referring to an argument in another function!", &I);
1752 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(I.getOperand(i))) {
1753 Assert1(GV->getParent() == Mod, "Referencing global in another module!",
1755 } else if (isa<Instruction>(I.getOperand(i))) {
1756 verifyDominatesUse(I, i);
1757 } else if (isa<InlineAsm>(I.getOperand(i))) {
1758 Assert1((i + 1 == e && isa<CallInst>(I)) ||
1759 (i + 3 == e && isa<InvokeInst>(I)),
1760 "Cannot take the address of an inline asm!", &I);
1764 if (MDNode *MD = I.getMetadata(LLVMContext::MD_fpmath)) {
1765 Assert1(I.getType()->isFPOrFPVectorTy(),
1766 "fpmath requires a floating point result!", &I);
1767 Assert1(MD->getNumOperands() == 1, "fpmath takes one operand!", &I);
1768 Value *Op0 = MD->getOperand(0);
1769 if (ConstantFP *CFP0 = dyn_cast_or_null<ConstantFP>(Op0)) {
1770 APFloat Accuracy = CFP0->getValueAPF();
1771 Assert1(Accuracy.isNormal() && !Accuracy.isNegative(),
1772 "fpmath accuracy not a positive number!", &I);
1774 Assert1(false, "invalid fpmath accuracy!", &I);
1778 MDNode *MD = I.getMetadata(LLVMContext::MD_range);
1779 Assert1(!MD || isa<LoadInst>(I), "Ranges are only for loads!", &I);
1781 InstsInThisBlock.insert(&I);
1784 /// VerifyIntrinsicType - Verify that the specified type (which comes from an
1785 /// intrinsic argument or return value) matches the type constraints specified
1786 /// by the .td file (e.g. an "any integer" argument really is an integer).
1788 /// This return true on error but does not print a message.
1789 bool Verifier::VerifyIntrinsicType(Type *Ty,
1790 ArrayRef<Intrinsic::IITDescriptor> &Infos,
1791 SmallVectorImpl<Type*> &ArgTys) {
1792 using namespace Intrinsic;
1794 // If we ran out of descriptors, there are too many arguments.
1795 if (Infos.empty()) return true;
1796 IITDescriptor D = Infos.front();
1797 Infos = Infos.slice(1);
1800 case IITDescriptor::Void: return !Ty->isVoidTy();
1801 case IITDescriptor::MMX: return !Ty->isX86_MMXTy();
1802 case IITDescriptor::Metadata: return !Ty->isMetadataTy();
1803 case IITDescriptor::Float: return !Ty->isFloatTy();
1804 case IITDescriptor::Double: return !Ty->isDoubleTy();
1805 case IITDescriptor::Integer: return !Ty->isIntegerTy(D.Integer_Width);
1806 case IITDescriptor::Vector: {
1807 VectorType *VT = dyn_cast<VectorType>(Ty);
1808 return VT == 0 || VT->getNumElements() != D.Vector_Width ||
1809 VerifyIntrinsicType(VT->getElementType(), Infos, ArgTys);
1811 case IITDescriptor::Pointer: {
1812 PointerType *PT = dyn_cast<PointerType>(Ty);
1813 return PT == 0 || PT->getAddressSpace() != D.Pointer_AddressSpace ||
1814 VerifyIntrinsicType(PT->getElementType(), Infos, ArgTys);
1817 case IITDescriptor::Struct: {
1818 StructType *ST = dyn_cast<StructType>(Ty);
1819 if (ST == 0 || ST->getNumElements() != D.Struct_NumElements)
1822 for (unsigned i = 0, e = D.Struct_NumElements; i != e; ++i)
1823 if (VerifyIntrinsicType(ST->getElementType(i), Infos, ArgTys))
1828 case IITDescriptor::Argument:
1829 // Two cases here - If this is the second occurrence of an argument, verify
1830 // that the later instance matches the previous instance.
1831 if (D.getArgumentNumber() < ArgTys.size())
1832 return Ty != ArgTys[D.getArgumentNumber()];
1834 // Otherwise, if this is the first instance of an argument, record it and
1835 // verify the "Any" kind.
1836 assert(D.getArgumentNumber() == ArgTys.size() && "Table consistency error");
1837 ArgTys.push_back(Ty);
1839 switch (D.getArgumentKind()) {
1840 case IITDescriptor::AK_AnyInteger: return !Ty->isIntOrIntVectorTy();
1841 case IITDescriptor::AK_AnyFloat: return !Ty->isFPOrFPVectorTy();
1842 case IITDescriptor::AK_AnyVector: return !isa<VectorType>(Ty);
1843 case IITDescriptor::AK_AnyPointer: return !isa<PointerType>(Ty);
1845 llvm_unreachable("all argument kinds not covered");
1847 case IITDescriptor::ExtendVecArgument:
1848 // This may only be used when referring to a previous vector argument.
1849 return D.getArgumentNumber() >= ArgTys.size() ||
1850 !isa<VectorType>(ArgTys[D.getArgumentNumber()]) ||
1851 VectorType::getExtendedElementVectorType(
1852 cast<VectorType>(ArgTys[D.getArgumentNumber()])) != Ty;
1854 case IITDescriptor::TruncVecArgument:
1855 // This may only be used when referring to a previous vector argument.
1856 return D.getArgumentNumber() >= ArgTys.size() ||
1857 !isa<VectorType>(ArgTys[D.getArgumentNumber()]) ||
1858 VectorType::getTruncatedElementVectorType(
1859 cast<VectorType>(ArgTys[D.getArgumentNumber()])) != Ty;
1861 llvm_unreachable("unhandled");
1864 /// visitIntrinsicFunction - Allow intrinsics to be verified in different ways.
1866 void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) {
1867 Function *IF = CI.getCalledFunction();
1868 Assert1(IF->isDeclaration(), "Intrinsic functions should never be defined!",
1871 // Verify that the intrinsic prototype lines up with what the .td files
1873 FunctionType *IFTy = IF->getFunctionType();
1874 Assert1(!IFTy->isVarArg(), "Intrinsic prototypes are not varargs", IF);
1876 SmallVector<Intrinsic::IITDescriptor, 8> Table;
1877 getIntrinsicInfoTableEntries(ID, Table);
1878 ArrayRef<Intrinsic::IITDescriptor> TableRef = Table;
1880 SmallVector<Type *, 4> ArgTys;
1881 Assert1(!VerifyIntrinsicType(IFTy->getReturnType(), TableRef, ArgTys),
1882 "Intrinsic has incorrect return type!", IF);
1883 for (unsigned i = 0, e = IFTy->getNumParams(); i != e; ++i)
1884 Assert1(!VerifyIntrinsicType(IFTy->getParamType(i), TableRef, ArgTys),
1885 "Intrinsic has incorrect argument type!", IF);
1886 Assert1(TableRef.empty(), "Intrinsic has too few arguments!", IF);
1888 // Now that we have the intrinsic ID and the actual argument types (and we
1889 // know they are legal for the intrinsic!) get the intrinsic name through the
1890 // usual means. This allows us to verify the mangling of argument types into
1892 Assert1(Intrinsic::getName(ID, ArgTys) == IF->getName(),
1893 "Intrinsic name not mangled correctly for type arguments!", IF);
1895 // If the intrinsic takes MDNode arguments, verify that they are either global
1896 // or are local to *this* function.
1897 for (unsigned i = 0, e = CI.getNumArgOperands(); i != e; ++i)
1898 if (MDNode *MD = dyn_cast<MDNode>(CI.getArgOperand(i)))
1899 visitMDNode(*MD, CI.getParent()->getParent());
1904 case Intrinsic::ctlz: // llvm.ctlz
1905 case Intrinsic::cttz: // llvm.cttz
1906 Assert1(isa<ConstantInt>(CI.getArgOperand(1)),
1907 "is_zero_undef argument of bit counting intrinsics must be a "
1908 "constant int", &CI);
1910 case Intrinsic::dbg_declare: { // llvm.dbg.declare
1911 Assert1(CI.getArgOperand(0) && isa<MDNode>(CI.getArgOperand(0)),
1912 "invalid llvm.dbg.declare intrinsic call 1", &CI);
1913 MDNode *MD = cast<MDNode>(CI.getArgOperand(0));
1914 Assert1(MD->getNumOperands() == 1,
1915 "invalid llvm.dbg.declare intrinsic call 2", &CI);
1917 case Intrinsic::memcpy:
1918 case Intrinsic::memmove:
1919 case Intrinsic::memset:
1920 Assert1(isa<ConstantInt>(CI.getArgOperand(3)),
1921 "alignment argument of memory intrinsics must be a constant int",
1923 Assert1(isa<ConstantInt>(CI.getArgOperand(4)),
1924 "isvolatile argument of memory intrinsics must be a constant int",
1927 case Intrinsic::gcroot:
1928 case Intrinsic::gcwrite:
1929 case Intrinsic::gcread:
1930 if (ID == Intrinsic::gcroot) {
1932 dyn_cast<AllocaInst>(CI.getArgOperand(0)->stripPointerCasts());
1933 Assert1(AI, "llvm.gcroot parameter #1 must be an alloca.", &CI);
1934 Assert1(isa<Constant>(CI.getArgOperand(1)),
1935 "llvm.gcroot parameter #2 must be a constant.", &CI);
1936 if (!AI->getType()->getElementType()->isPointerTy()) {
1937 Assert1(!isa<ConstantPointerNull>(CI.getArgOperand(1)),
1938 "llvm.gcroot parameter #1 must either be a pointer alloca, "
1939 "or argument #2 must be a non-null constant.", &CI);
1943 Assert1(CI.getParent()->getParent()->hasGC(),
1944 "Enclosing function does not use GC.", &CI);
1946 case Intrinsic::init_trampoline:
1947 Assert1(isa<Function>(CI.getArgOperand(1)->stripPointerCasts()),
1948 "llvm.init_trampoline parameter #2 must resolve to a function.",
1951 case Intrinsic::prefetch:
1952 Assert1(isa<ConstantInt>(CI.getArgOperand(1)) &&
1953 isa<ConstantInt>(CI.getArgOperand(2)) &&
1954 cast<ConstantInt>(CI.getArgOperand(1))->getZExtValue() < 2 &&
1955 cast<ConstantInt>(CI.getArgOperand(2))->getZExtValue() < 4,
1956 "invalid arguments to llvm.prefetch",
1959 case Intrinsic::stackprotector:
1960 Assert1(isa<AllocaInst>(CI.getArgOperand(1)->stripPointerCasts()),
1961 "llvm.stackprotector parameter #2 must resolve to an alloca.",
1964 case Intrinsic::lifetime_start:
1965 case Intrinsic::lifetime_end:
1966 case Intrinsic::invariant_start:
1967 Assert1(isa<ConstantInt>(CI.getArgOperand(0)),
1968 "size argument of memory use markers must be a constant integer",
1971 case Intrinsic::invariant_end:
1972 Assert1(isa<ConstantInt>(CI.getArgOperand(1)),
1973 "llvm.invariant.end parameter #2 must be a constant integer", &CI);
1978 //===----------------------------------------------------------------------===//
1979 // Implement the public interfaces to this file...
1980 //===----------------------------------------------------------------------===//
1982 FunctionPass *llvm::createVerifierPass(VerifierFailureAction action) {
1983 return new Verifier(action);
1987 /// verifyFunction - Check a function for errors, printing messages on stderr.
1988 /// Return true if the function is corrupt.
1990 bool llvm::verifyFunction(const Function &f, VerifierFailureAction action) {
1991 Function &F = const_cast<Function&>(f);
1992 assert(!F.isDeclaration() && "Cannot verify external functions");
1994 FunctionPassManager FPM(F.getParent());
1995 Verifier *V = new Verifier(action);
2001 /// verifyModule - Check a module for errors, printing messages on stderr.
2002 /// Return true if the module is corrupt.
2004 bool llvm::verifyModule(const Module &M, VerifierFailureAction action,
2005 std::string *ErrorInfo) {
2007 Verifier *V = new Verifier(action);
2009 PM.run(const_cast<Module&>(M));
2011 if (ErrorInfo && V->Broken)
2012 *ErrorInfo = V->MessagesStr.str();