1 //===-- Verifier.cpp - Implement the Module Verifier -------------*- C++ -*-==//
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 // * All other things that are tested by asserts spread about the code...
40 //===----------------------------------------------------------------------===//
42 #include "llvm/Analysis/Verifier.h"
43 #include "llvm/CallingConv.h"
44 #include "llvm/Constants.h"
45 #include "llvm/DerivedTypes.h"
46 #include "llvm/InlineAsm.h"
47 #include "llvm/IntrinsicInst.h"
48 #include "llvm/Metadata.h"
49 #include "llvm/Module.h"
50 #include "llvm/Pass.h"
51 #include "llvm/PassManager.h"
52 #include "llvm/TypeSymbolTable.h"
53 #include "llvm/Analysis/Dominators.h"
54 #include "llvm/Assembly/Writer.h"
55 #include "llvm/CodeGen/ValueTypes.h"
56 #include "llvm/Support/CallSite.h"
57 #include "llvm/Support/CFG.h"
58 #include "llvm/Support/Debug.h"
59 #include "llvm/Support/InstVisitor.h"
60 #include "llvm/ADT/SetVector.h"
61 #include "llvm/ADT/SmallPtrSet.h"
62 #include "llvm/ADT/SmallVector.h"
63 #include "llvm/ADT/StringExtras.h"
64 #include "llvm/ADT/STLExtras.h"
65 #include "llvm/Support/ErrorHandling.h"
66 #include "llvm/Support/raw_ostream.h"
71 namespace { // Anonymous namespace for class
72 struct PreVerifier : public FunctionPass {
73 static char ID; // Pass ID, replacement for typeid
75 PreVerifier() : FunctionPass(ID) { }
77 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
81 // Check that the prerequisites for successful DominatorTree construction
83 bool runOnFunction(Function &F) {
86 for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I) {
87 if (I->empty() || !I->back().isTerminator()) {
88 dbgs() << "Basic Block in function '" << F.getName()
89 << "' does not have terminator!\n";
90 WriteAsOperand(dbgs(), I, true);
97 report_fatal_error("Broken module, no Basic Block terminator!");
104 char PreVerifier::ID = 0;
105 static RegisterPass<PreVerifier>
106 PreVer("preverify", "Preliminary module verification");
107 char &PreVerifyID = PreVerifier::ID;
110 class TypeSet : public AbstractTypeUser {
114 /// Insert a type into the set of types.
115 bool insert(const Type *Ty) {
116 if (!Types.insert(Ty))
118 if (Ty->isAbstract())
119 Ty->addAbstractTypeUser(this);
123 // Remove ourselves as abstract type listeners for any types that remain
124 // abstract when the TypeSet is destroyed.
126 for (SmallSetVector<const Type *, 16>::iterator I = Types.begin(),
127 E = Types.end(); I != E; ++I) {
129 if (Ty->isAbstract())
130 Ty->removeAbstractTypeUser(this);
134 // Abstract type user interface.
136 /// Remove types from the set when refined. Do not insert the type it was
137 /// refined to because that type hasn't been verified yet.
138 void refineAbstractType(const DerivedType *OldTy, const Type *NewTy) {
140 OldTy->removeAbstractTypeUser(this);
143 /// Stop listening for changes to a type which is no longer abstract.
144 void typeBecameConcrete(const DerivedType *AbsTy) {
145 AbsTy->removeAbstractTypeUser(this);
151 SmallSetVector<const Type *, 16> Types;
154 TypeSet(const TypeSet &) ATTRIBUTE_UNUSED;
155 TypeSet &operator=(const TypeSet &) ATTRIBUTE_UNUSED;
158 struct Verifier : public FunctionPass, public InstVisitor<Verifier> {
159 static char ID; // Pass ID, replacement for typeid
160 bool Broken; // Is this module found to be broken?
161 bool RealPass; // Are we not being run by a PassManager?
162 VerifierFailureAction action;
163 // What to do if verification fails.
164 Module *Mod; // Module we are verifying right now
165 LLVMContext *Context; // Context within which we are verifying
166 DominatorTree *DT; // Dominator Tree, caution can be null!
168 std::string Messages;
169 raw_string_ostream MessagesStr;
171 /// InstInThisBlock - when verifying a basic block, keep track of all of the
172 /// instructions we have seen so far. This allows us to do efficient
173 /// dominance checks for the case when an instruction has an operand that is
174 /// an instruction in the same block.
175 SmallPtrSet<Instruction*, 16> InstsInThisBlock;
177 /// Types - keep track of the types that have been checked already.
180 /// MDNodes - keep track of the metadata nodes that have been checked
182 SmallPtrSet<MDNode *, 32> MDNodes;
186 Broken(false), RealPass(true), action(AbortProcessAction),
187 Mod(0), Context(0), DT(0), MessagesStr(Messages) {}
188 explicit Verifier(VerifierFailureAction ctn)
190 Broken(false), RealPass(true), action(ctn), Mod(0), Context(0), DT(0),
191 MessagesStr(Messages) {}
192 explicit Verifier(bool AB)
194 Broken(false), RealPass(true),
195 action( AB ? AbortProcessAction : PrintMessageAction), Mod(0),
196 Context(0), DT(0), MessagesStr(Messages) {}
197 explicit Verifier(DominatorTree &dt)
199 Broken(false), RealPass(false), action(PrintMessageAction), Mod(0),
200 Context(0), DT(&dt), MessagesStr(Messages) {}
203 bool doInitialization(Module &M) {
205 Context = &M.getContext();
206 verifyTypeSymbolTable(M.getTypeSymbolTable());
208 // If this is a real pass, in a pass manager, we must abort before
209 // returning back to the pass manager, or else the pass manager may try to
210 // run other passes on the broken module.
212 return abortIfBroken();
216 bool runOnFunction(Function &F) {
217 // Get dominator information if we are being run by PassManager
218 if (RealPass) DT = &getAnalysis<DominatorTree>();
221 if (!Context) Context = &F.getContext();
224 InstsInThisBlock.clear();
226 // If this is a real pass, in a pass manager, we must abort before
227 // returning back to the pass manager, or else the pass manager may try to
228 // run other passes on the broken module.
230 return abortIfBroken();
235 bool doFinalization(Module &M) {
236 // Scan through, checking all of the external function's linkage now...
237 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
238 visitGlobalValue(*I);
240 // Check to make sure function prototypes are okay.
241 if (I->isDeclaration()) visitFunction(*I);
244 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
246 visitGlobalVariable(*I);
248 for (Module::alias_iterator I = M.alias_begin(), E = M.alias_end();
250 visitGlobalAlias(*I);
252 for (Module::named_metadata_iterator I = M.named_metadata_begin(),
253 E = M.named_metadata_end(); I != E; ++I)
254 visitNamedMDNode(*I);
256 // If the module is broken, abort at this time.
257 return abortIfBroken();
260 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
261 AU.setPreservesAll();
262 AU.addRequiredID(PreVerifyID);
264 AU.addRequired<DominatorTree>();
267 /// abortIfBroken - If the module is broken and we are supposed to abort on
268 /// this condition, do so.
270 bool abortIfBroken() {
271 if (!Broken) return false;
272 MessagesStr << "Broken module found, ";
274 default: llvm_unreachable("Unknown action");
275 case AbortProcessAction:
276 MessagesStr << "compilation aborted!\n";
277 dbgs() << MessagesStr.str();
278 // Client should choose different reaction if abort is not desired
280 case PrintMessageAction:
281 MessagesStr << "verification continues.\n";
282 dbgs() << MessagesStr.str();
284 case ReturnStatusAction:
285 MessagesStr << "compilation terminated.\n";
291 // Verification methods...
292 void verifyTypeSymbolTable(TypeSymbolTable &ST);
293 void visitGlobalValue(GlobalValue &GV);
294 void visitGlobalVariable(GlobalVariable &GV);
295 void visitGlobalAlias(GlobalAlias &GA);
296 void visitNamedMDNode(NamedMDNode &NMD);
297 void visitMDNode(MDNode &MD, Function *F);
298 void visitFunction(Function &F);
299 void visitBasicBlock(BasicBlock &BB);
300 using InstVisitor<Verifier>::visit;
302 void visit(Instruction &I);
304 void visitTruncInst(TruncInst &I);
305 void visitZExtInst(ZExtInst &I);
306 void visitSExtInst(SExtInst &I);
307 void visitFPTruncInst(FPTruncInst &I);
308 void visitFPExtInst(FPExtInst &I);
309 void visitFPToUIInst(FPToUIInst &I);
310 void visitFPToSIInst(FPToSIInst &I);
311 void visitUIToFPInst(UIToFPInst &I);
312 void visitSIToFPInst(SIToFPInst &I);
313 void visitIntToPtrInst(IntToPtrInst &I);
314 void visitPtrToIntInst(PtrToIntInst &I);
315 void visitBitCastInst(BitCastInst &I);
316 void visitPHINode(PHINode &PN);
317 void visitBinaryOperator(BinaryOperator &B);
318 void visitICmpInst(ICmpInst &IC);
319 void visitFCmpInst(FCmpInst &FC);
320 void visitExtractElementInst(ExtractElementInst &EI);
321 void visitInsertElementInst(InsertElementInst &EI);
322 void visitShuffleVectorInst(ShuffleVectorInst &EI);
323 void visitVAArgInst(VAArgInst &VAA) { visitInstruction(VAA); }
324 void visitCallInst(CallInst &CI);
325 void visitInvokeInst(InvokeInst &II);
326 void visitGetElementPtrInst(GetElementPtrInst &GEP);
327 void visitLoadInst(LoadInst &LI);
328 void visitStoreInst(StoreInst &SI);
329 void visitInstruction(Instruction &I);
330 void visitTerminatorInst(TerminatorInst &I);
331 void visitBranchInst(BranchInst &BI);
332 void visitReturnInst(ReturnInst &RI);
333 void visitSwitchInst(SwitchInst &SI);
334 void visitIndirectBrInst(IndirectBrInst &BI);
335 void visitSelectInst(SelectInst &SI);
336 void visitUserOp1(Instruction &I);
337 void visitUserOp2(Instruction &I) { visitUserOp1(I); }
338 void visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI);
339 void visitAllocaInst(AllocaInst &AI);
340 void visitExtractValueInst(ExtractValueInst &EVI);
341 void visitInsertValueInst(InsertValueInst &IVI);
343 void VerifyCallSite(CallSite CS);
344 bool PerformTypeCheck(Intrinsic::ID ID, Function *F, const Type *Ty,
345 int VT, unsigned ArgNo, std::string &Suffix);
346 void VerifyIntrinsicPrototype(Intrinsic::ID ID, Function *F,
347 unsigned RetNum, unsigned ParamNum, ...);
348 void VerifyParameterAttrs(Attributes Attrs, const Type *Ty,
349 bool isReturnValue, const Value *V);
350 void VerifyFunctionAttrs(const FunctionType *FT, const AttrListPtr &Attrs,
352 void VerifyType(const Type *Ty);
354 void WriteValue(const Value *V) {
356 if (isa<Instruction>(V)) {
357 MessagesStr << *V << '\n';
359 WriteAsOperand(MessagesStr, V, true, Mod);
364 void WriteType(const Type *T) {
367 WriteTypeSymbolic(MessagesStr, T, Mod);
371 // CheckFailed - A check failed, so print out the condition and the message
372 // that failed. This provides a nice place to put a breakpoint if you want
373 // to see why something is not correct.
374 void CheckFailed(const Twine &Message,
375 const Value *V1 = 0, const Value *V2 = 0,
376 const Value *V3 = 0, const Value *V4 = 0) {
377 MessagesStr << Message.str() << "\n";
385 void CheckFailed(const Twine &Message, const Value *V1,
386 const Type *T2, const Value *V3 = 0) {
387 MessagesStr << Message.str() << "\n";
394 void CheckFailed(const Twine &Message, const Type *T1,
395 const Type *T2 = 0, const Type *T3 = 0) {
396 MessagesStr << Message.str() << "\n";
403 } // End anonymous namespace
405 char Verifier::ID = 0;
406 static RegisterPass<Verifier> X("verify", "Module Verifier");
408 // Assert - We know that cond should be true, if not print an error message.
409 #define Assert(C, M) \
410 do { if (!(C)) { CheckFailed(M); return; } } while (0)
411 #define Assert1(C, M, V1) \
412 do { if (!(C)) { CheckFailed(M, V1); return; } } while (0)
413 #define Assert2(C, M, V1, V2) \
414 do { if (!(C)) { CheckFailed(M, V1, V2); return; } } while (0)
415 #define Assert3(C, M, V1, V2, V3) \
416 do { if (!(C)) { CheckFailed(M, V1, V2, V3); return; } } while (0)
417 #define Assert4(C, M, V1, V2, V3, V4) \
418 do { if (!(C)) { CheckFailed(M, V1, V2, V3, V4); return; } } while (0)
420 void Verifier::visit(Instruction &I) {
421 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
422 Assert1(I.getOperand(i) != 0, "Operand is null", &I);
423 InstVisitor<Verifier>::visit(I);
427 void Verifier::visitGlobalValue(GlobalValue &GV) {
428 Assert1(!GV.isDeclaration() ||
429 GV.isMaterializable() ||
430 GV.hasExternalLinkage() ||
431 GV.hasDLLImportLinkage() ||
432 GV.hasExternalWeakLinkage() ||
433 (isa<GlobalAlias>(GV) &&
434 (GV.hasLocalLinkage() || GV.hasWeakLinkage())),
435 "Global is external, but doesn't have external or dllimport or weak linkage!",
438 Assert1(!GV.hasDLLImportLinkage() || GV.isDeclaration(),
439 "Global is marked as dllimport, but not external", &GV);
441 Assert1(!GV.hasAppendingLinkage() || isa<GlobalVariable>(GV),
442 "Only global variables can have appending linkage!", &GV);
444 if (GV.hasAppendingLinkage()) {
445 GlobalVariable *GVar = dyn_cast<GlobalVariable>(&GV);
446 Assert1(GVar && GVar->getType()->getElementType()->isArrayTy(),
447 "Only global arrays can have appending linkage!", GVar);
451 void Verifier::visitGlobalVariable(GlobalVariable &GV) {
452 if (GV.hasInitializer()) {
453 Assert1(GV.getInitializer()->getType() == GV.getType()->getElementType(),
454 "Global variable initializer type does not match global "
455 "variable type!", &GV);
457 // If the global has common linkage, it must have a zero initializer and
458 // cannot be constant.
459 if (GV.hasCommonLinkage()) {
460 Assert1(GV.getInitializer()->isNullValue(),
461 "'common' global must have a zero initializer!", &GV);
462 Assert1(!GV.isConstant(), "'common' global may not be marked constant!",
466 Assert1(GV.hasExternalLinkage() || GV.hasDLLImportLinkage() ||
467 GV.hasExternalWeakLinkage(),
468 "invalid linkage type for global declaration", &GV);
471 visitGlobalValue(GV);
474 void Verifier::visitGlobalAlias(GlobalAlias &GA) {
475 Assert1(!GA.getName().empty(),
476 "Alias name cannot be empty!", &GA);
477 Assert1(GA.hasExternalLinkage() || GA.hasLocalLinkage() ||
479 "Alias should have external or external weak linkage!", &GA);
480 Assert1(GA.getAliasee(),
481 "Aliasee cannot be NULL!", &GA);
482 Assert1(GA.getType() == GA.getAliasee()->getType(),
483 "Alias and aliasee types should match!", &GA);
485 if (!isa<GlobalValue>(GA.getAliasee())) {
486 const ConstantExpr *CE = dyn_cast<ConstantExpr>(GA.getAliasee());
488 (CE->getOpcode() == Instruction::BitCast ||
489 CE->getOpcode() == Instruction::GetElementPtr) &&
490 isa<GlobalValue>(CE->getOperand(0)),
491 "Aliasee should be either GlobalValue or bitcast of GlobalValue",
495 const GlobalValue* Aliasee = GA.resolveAliasedGlobal(/*stopOnWeak*/ false);
497 "Aliasing chain should end with function or global variable", &GA);
499 visitGlobalValue(GA);
502 void Verifier::visitNamedMDNode(NamedMDNode &NMD) {
503 for (unsigned i = 0, e = NMD.getNumOperands(); i != e; ++i) {
504 MDNode *MD = NMD.getOperand(i);
508 Assert1(!MD->isFunctionLocal(),
509 "Named metadata operand cannot be function local!", MD);
514 void Verifier::visitMDNode(MDNode &MD, Function *F) {
515 // Only visit each node once. Metadata can be mutually recursive, so this
516 // avoids infinite recursion here, as well as being an optimization.
517 if (!MDNodes.insert(&MD))
520 for (unsigned i = 0, e = MD.getNumOperands(); i != e; ++i) {
521 Value *Op = MD.getOperand(i);
524 if (isa<Constant>(Op) || isa<MDString>(Op))
526 if (MDNode *N = dyn_cast<MDNode>(Op)) {
527 Assert2(MD.isFunctionLocal() || !N->isFunctionLocal(),
528 "Global metadata operand cannot be function local!", &MD, N);
532 Assert2(MD.isFunctionLocal(), "Invalid operand for global metadata!", &MD, Op);
534 // If this was an instruction, bb, or argument, verify that it is in the
535 // function that we expect.
536 Function *ActualF = 0;
537 if (Instruction *I = dyn_cast<Instruction>(Op))
538 ActualF = I->getParent()->getParent();
539 else if (BasicBlock *BB = dyn_cast<BasicBlock>(Op))
540 ActualF = BB->getParent();
541 else if (Argument *A = dyn_cast<Argument>(Op))
542 ActualF = A->getParent();
543 assert(ActualF && "Unimplemented function local metadata case!");
545 Assert2(ActualF == F, "function-local metadata used in wrong function",
550 void Verifier::verifyTypeSymbolTable(TypeSymbolTable &ST) {
551 for (TypeSymbolTable::iterator I = ST.begin(), E = ST.end(); I != E; ++I)
552 VerifyType(I->second);
555 // VerifyParameterAttrs - Check the given attributes for an argument or return
556 // value of the specified type. The value V is printed in error messages.
557 void Verifier::VerifyParameterAttrs(Attributes Attrs, const Type *Ty,
558 bool isReturnValue, const Value *V) {
559 if (Attrs == Attribute::None)
562 Attributes FnCheckAttr = Attrs & Attribute::FunctionOnly;
563 Assert1(!FnCheckAttr, "Attribute " + Attribute::getAsString(FnCheckAttr) +
564 " only applies to the function!", V);
567 Attributes RetI = Attrs & Attribute::ParameterOnly;
568 Assert1(!RetI, "Attribute " + Attribute::getAsString(RetI) +
569 " does not apply to return values!", V);
573 i < array_lengthof(Attribute::MutuallyIncompatible); ++i) {
574 Attributes MutI = Attrs & Attribute::MutuallyIncompatible[i];
575 Assert1(!(MutI & (MutI - 1)), "Attributes " +
576 Attribute::getAsString(MutI) + " are incompatible!", V);
579 Attributes TypeI = Attrs & Attribute::typeIncompatible(Ty);
580 Assert1(!TypeI, "Wrong type for attribute " +
581 Attribute::getAsString(TypeI), V);
583 Attributes ByValI = Attrs & Attribute::ByVal;
584 if (const PointerType *PTy = dyn_cast<PointerType>(Ty)) {
585 Assert1(!ByValI || PTy->getElementType()->isSized(),
586 "Attribute " + Attribute::getAsString(ByValI) +
587 " does not support unsized types!", V);
590 "Attribute " + Attribute::getAsString(ByValI) +
591 " only applies to parameters with pointer type!", V);
595 // VerifyFunctionAttrs - Check parameter attributes against a function type.
596 // The value V is printed in error messages.
597 void Verifier::VerifyFunctionAttrs(const FunctionType *FT,
598 const AttrListPtr &Attrs,
603 bool SawNest = false;
605 for (unsigned i = 0, e = Attrs.getNumSlots(); i != e; ++i) {
606 const AttributeWithIndex &Attr = Attrs.getSlot(i);
610 Ty = FT->getReturnType();
611 else if (Attr.Index-1 < FT->getNumParams())
612 Ty = FT->getParamType(Attr.Index-1);
614 break; // VarArgs attributes, verified elsewhere.
616 VerifyParameterAttrs(Attr.Attrs, Ty, Attr.Index == 0, V);
618 if (Attr.Attrs & Attribute::Nest) {
619 Assert1(!SawNest, "More than one parameter has attribute nest!", V);
623 if (Attr.Attrs & Attribute::StructRet)
624 Assert1(Attr.Index == 1, "Attribute sret not on first parameter!", V);
627 Attributes FAttrs = Attrs.getFnAttributes();
628 Attributes NotFn = FAttrs & (~Attribute::FunctionOnly);
629 Assert1(!NotFn, "Attribute " + Attribute::getAsString(NotFn) +
630 " does not apply to the function!", V);
633 i < array_lengthof(Attribute::MutuallyIncompatible); ++i) {
634 Attributes MutI = FAttrs & Attribute::MutuallyIncompatible[i];
635 Assert1(!(MutI & (MutI - 1)), "Attributes " +
636 Attribute::getAsString(MutI) + " are incompatible!", V);
640 static bool VerifyAttributeCount(const AttrListPtr &Attrs, unsigned Params) {
644 unsigned LastSlot = Attrs.getNumSlots() - 1;
645 unsigned LastIndex = Attrs.getSlot(LastSlot).Index;
646 if (LastIndex <= Params
647 || (LastIndex == (unsigned)~0
648 && (LastSlot == 0 || Attrs.getSlot(LastSlot - 1).Index <= Params)))
654 // visitFunction - Verify that a function is ok.
656 void Verifier::visitFunction(Function &F) {
657 // Check function arguments.
658 const FunctionType *FT = F.getFunctionType();
659 unsigned NumArgs = F.arg_size();
661 Assert1(Context == &F.getContext(),
662 "Function context does not match Module context!", &F);
664 Assert1(!F.hasCommonLinkage(), "Functions may not have common linkage", &F);
665 Assert2(FT->getNumParams() == NumArgs,
666 "# formal arguments must match # of arguments for function type!",
668 Assert1(F.getReturnType()->isFirstClassType() ||
669 F.getReturnType()->isVoidTy() ||
670 F.getReturnType()->isStructTy(),
671 "Functions cannot return aggregate values!", &F);
673 Assert1(!F.hasStructRetAttr() || F.getReturnType()->isVoidTy(),
674 "Invalid struct return type!", &F);
676 const AttrListPtr &Attrs = F.getAttributes();
678 Assert1(VerifyAttributeCount(Attrs, FT->getNumParams()),
679 "Attributes after last parameter!", &F);
681 // Check function attributes.
682 VerifyFunctionAttrs(FT, Attrs, &F);
684 // Check that this function meets the restrictions on this calling convention.
685 switch (F.getCallingConv()) {
690 case CallingConv::Fast:
691 case CallingConv::Cold:
692 case CallingConv::X86_FastCall:
693 case CallingConv::X86_ThisCall:
694 Assert1(!F.isVarArg(),
695 "Varargs functions must have C calling conventions!", &F);
699 bool isLLVMdotName = F.getName().size() >= 5 &&
700 F.getName().substr(0, 5) == "llvm.";
702 // Check that the argument values match the function type for this function...
704 for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end();
706 Assert2(I->getType() == FT->getParamType(i),
707 "Argument value does not match function argument type!",
708 I, FT->getParamType(i));
709 Assert1(I->getType()->isFirstClassType(),
710 "Function arguments must have first-class types!", I);
712 Assert2(!I->getType()->isMetadataTy(),
713 "Function takes metadata but isn't an intrinsic", I, &F);
716 if (F.isMaterializable()) {
717 // Function has a body somewhere we can't see.
718 } else if (F.isDeclaration()) {
719 Assert1(F.hasExternalLinkage() || F.hasDLLImportLinkage() ||
720 F.hasExternalWeakLinkage(),
721 "invalid linkage type for function declaration", &F);
723 // Verify that this function (which has a body) is not named "llvm.*". It
724 // is not legal to define intrinsics.
725 Assert1(!isLLVMdotName, "llvm intrinsics cannot be defined!", &F);
727 // Check the entry node
728 BasicBlock *Entry = &F.getEntryBlock();
729 Assert1(pred_begin(Entry) == pred_end(Entry),
730 "Entry block to function must not have predecessors!", Entry);
732 // The address of the entry block cannot be taken, unless it is dead.
733 if (Entry->hasAddressTaken()) {
734 Assert1(!BlockAddress::get(Entry)->isConstantUsed(),
735 "blockaddress may not be used with the entry block!", Entry);
739 // If this function is actually an intrinsic, verify that it is only used in
740 // direct call/invokes, never having its "address taken".
741 if (F.getIntrinsicID()) {
743 if (F.hasAddressTaken(&U))
744 Assert1(0, "Invalid user of intrinsic instruction!", U);
748 // verifyBasicBlock - Verify that a basic block is well formed...
750 void Verifier::visitBasicBlock(BasicBlock &BB) {
751 InstsInThisBlock.clear();
753 // Ensure that basic blocks have terminators!
754 Assert1(BB.getTerminator(), "Basic Block does not have terminator!", &BB);
756 // Check constraints that this basic block imposes on all of the PHI nodes in
758 if (isa<PHINode>(BB.front())) {
759 SmallVector<BasicBlock*, 8> Preds(pred_begin(&BB), pred_end(&BB));
760 SmallVector<std::pair<BasicBlock*, Value*>, 8> Values;
761 std::sort(Preds.begin(), Preds.end());
763 for (BasicBlock::iterator I = BB.begin(); (PN = dyn_cast<PHINode>(I));++I) {
764 // Ensure that PHI nodes have at least one entry!
765 Assert1(PN->getNumIncomingValues() != 0,
766 "PHI nodes must have at least one entry. If the block is dead, "
767 "the PHI should be removed!", PN);
768 Assert1(PN->getNumIncomingValues() == Preds.size(),
769 "PHINode should have one entry for each predecessor of its "
770 "parent basic block!", PN);
772 // Get and sort all incoming values in the PHI node...
774 Values.reserve(PN->getNumIncomingValues());
775 for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i)
776 Values.push_back(std::make_pair(PN->getIncomingBlock(i),
777 PN->getIncomingValue(i)));
778 std::sort(Values.begin(), Values.end());
780 for (unsigned i = 0, e = Values.size(); i != e; ++i) {
781 // Check to make sure that if there is more than one entry for a
782 // particular basic block in this PHI node, that the incoming values are
785 Assert4(i == 0 || Values[i].first != Values[i-1].first ||
786 Values[i].second == Values[i-1].second,
787 "PHI node has multiple entries for the same basic block with "
788 "different incoming values!", PN, Values[i].first,
789 Values[i].second, Values[i-1].second);
791 // Check to make sure that the predecessors and PHI node entries are
793 Assert3(Values[i].first == Preds[i],
794 "PHI node entries do not match predecessors!", PN,
795 Values[i].first, Preds[i]);
801 void Verifier::visitTerminatorInst(TerminatorInst &I) {
802 // Ensure that terminators only exist at the end of the basic block.
803 Assert1(&I == I.getParent()->getTerminator(),
804 "Terminator found in the middle of a basic block!", I.getParent());
808 void Verifier::visitBranchInst(BranchInst &BI) {
809 if (BI.isConditional()) {
810 Assert2(BI.getCondition()->getType()->isIntegerTy(1),
811 "Branch condition is not 'i1' type!", &BI, BI.getCondition());
813 visitTerminatorInst(BI);
816 void Verifier::visitReturnInst(ReturnInst &RI) {
817 Function *F = RI.getParent()->getParent();
818 unsigned N = RI.getNumOperands();
819 if (F->getReturnType()->isVoidTy())
821 "Found return instr that returns non-void in Function of void "
822 "return type!", &RI, F->getReturnType());
823 else if (N == 1 && F->getReturnType() == RI.getOperand(0)->getType()) {
824 // Exactly one return value and it matches the return type. Good.
825 } else if (const StructType *STy = dyn_cast<StructType>(F->getReturnType())) {
826 // The return type is a struct; check for multiple return values.
827 Assert2(STy->getNumElements() == N,
828 "Incorrect number of return values in ret instruction!",
829 &RI, F->getReturnType());
830 for (unsigned i = 0; i != N; ++i)
831 Assert2(STy->getElementType(i) == RI.getOperand(i)->getType(),
832 "Function return type does not match operand "
833 "type of return inst!", &RI, F->getReturnType());
834 } else if (const ArrayType *ATy = dyn_cast<ArrayType>(F->getReturnType())) {
835 // The return type is an array; check for multiple return values.
836 Assert2(ATy->getNumElements() == N,
837 "Incorrect number of return values in ret instruction!",
838 &RI, F->getReturnType());
839 for (unsigned i = 0; i != N; ++i)
840 Assert2(ATy->getElementType() == RI.getOperand(i)->getType(),
841 "Function return type does not match operand "
842 "type of return inst!", &RI, F->getReturnType());
844 CheckFailed("Function return type does not match operand "
845 "type of return inst!", &RI, F->getReturnType());
848 // Check to make sure that the return value has necessary properties for
850 visitTerminatorInst(RI);
853 void Verifier::visitSwitchInst(SwitchInst &SI) {
854 // Check to make sure that all of the constants in the switch instruction
855 // have the same type as the switched-on value.
856 const Type *SwitchTy = SI.getCondition()->getType();
857 SmallPtrSet<ConstantInt*, 32> Constants;
858 for (unsigned i = 1, e = SI.getNumCases(); i != e; ++i) {
859 Assert1(SI.getCaseValue(i)->getType() == SwitchTy,
860 "Switch constants must all be same type as switch value!", &SI);
861 Assert2(Constants.insert(SI.getCaseValue(i)),
862 "Duplicate integer as switch case", &SI, SI.getCaseValue(i));
865 visitTerminatorInst(SI);
868 void Verifier::visitIndirectBrInst(IndirectBrInst &BI) {
869 Assert1(BI.getAddress()->getType()->isPointerTy(),
870 "Indirectbr operand must have pointer type!", &BI);
871 for (unsigned i = 0, e = BI.getNumDestinations(); i != e; ++i)
872 Assert1(BI.getDestination(i)->getType()->isLabelTy(),
873 "Indirectbr destinations must all have pointer type!", &BI);
875 visitTerminatorInst(BI);
878 void Verifier::visitSelectInst(SelectInst &SI) {
879 Assert1(!SelectInst::areInvalidOperands(SI.getOperand(0), SI.getOperand(1),
881 "Invalid operands for select instruction!", &SI);
883 Assert1(SI.getTrueValue()->getType() == SI.getType(),
884 "Select values must have same type as select instruction!", &SI);
885 visitInstruction(SI);
888 /// visitUserOp1 - User defined operators shouldn't live beyond the lifetime of
889 /// a pass, if any exist, it's an error.
891 void Verifier::visitUserOp1(Instruction &I) {
892 Assert1(0, "User-defined operators should not live outside of a pass!", &I);
895 void Verifier::visitTruncInst(TruncInst &I) {
896 // Get the source and destination types
897 const Type *SrcTy = I.getOperand(0)->getType();
898 const Type *DestTy = I.getType();
900 // Get the size of the types in bits, we'll need this later
901 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
902 unsigned DestBitSize = DestTy->getScalarSizeInBits();
904 Assert1(SrcTy->isIntOrIntVectorTy(), "Trunc only operates on integer", &I);
905 Assert1(DestTy->isIntOrIntVectorTy(), "Trunc only produces integer", &I);
906 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
907 "trunc source and destination must both be a vector or neither", &I);
908 Assert1(SrcBitSize > DestBitSize,"DestTy too big for Trunc", &I);
913 void Verifier::visitZExtInst(ZExtInst &I) {
914 // Get the source and destination types
915 const Type *SrcTy = I.getOperand(0)->getType();
916 const Type *DestTy = I.getType();
918 // Get the size of the types in bits, we'll need this later
919 Assert1(SrcTy->isIntOrIntVectorTy(), "ZExt only operates on integer", &I);
920 Assert1(DestTy->isIntOrIntVectorTy(), "ZExt only produces an integer", &I);
921 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
922 "zext source and destination must both be a vector or neither", &I);
923 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
924 unsigned DestBitSize = DestTy->getScalarSizeInBits();
926 Assert1(SrcBitSize < DestBitSize,"Type too small for ZExt", &I);
931 void Verifier::visitSExtInst(SExtInst &I) {
932 // Get the source and destination types
933 const Type *SrcTy = I.getOperand(0)->getType();
934 const Type *DestTy = I.getType();
936 // Get the size of the types in bits, we'll need this later
937 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
938 unsigned DestBitSize = DestTy->getScalarSizeInBits();
940 Assert1(SrcTy->isIntOrIntVectorTy(), "SExt only operates on integer", &I);
941 Assert1(DestTy->isIntOrIntVectorTy(), "SExt only produces an integer", &I);
942 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
943 "sext source and destination must both be a vector or neither", &I);
944 Assert1(SrcBitSize < DestBitSize,"Type too small for SExt", &I);
949 void Verifier::visitFPTruncInst(FPTruncInst &I) {
950 // Get the source and destination types
951 const Type *SrcTy = I.getOperand(0)->getType();
952 const Type *DestTy = I.getType();
953 // Get the size of the types in bits, we'll need this later
954 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
955 unsigned DestBitSize = DestTy->getScalarSizeInBits();
957 Assert1(SrcTy->isFPOrFPVectorTy(),"FPTrunc only operates on FP", &I);
958 Assert1(DestTy->isFPOrFPVectorTy(),"FPTrunc only produces an FP", &I);
959 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
960 "fptrunc source and destination must both be a vector or neither",&I);
961 Assert1(SrcBitSize > DestBitSize,"DestTy too big for FPTrunc", &I);
966 void Verifier::visitFPExtInst(FPExtInst &I) {
967 // Get the source and destination types
968 const Type *SrcTy = I.getOperand(0)->getType();
969 const Type *DestTy = I.getType();
971 // Get the size of the types in bits, we'll need this later
972 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
973 unsigned DestBitSize = DestTy->getScalarSizeInBits();
975 Assert1(SrcTy->isFPOrFPVectorTy(),"FPExt only operates on FP", &I);
976 Assert1(DestTy->isFPOrFPVectorTy(),"FPExt only produces an FP", &I);
977 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
978 "fpext source and destination must both be a vector or neither", &I);
979 Assert1(SrcBitSize < DestBitSize,"DestTy too small for FPExt", &I);
984 void Verifier::visitUIToFPInst(UIToFPInst &I) {
985 // Get the source and destination types
986 const Type *SrcTy = I.getOperand(0)->getType();
987 const Type *DestTy = I.getType();
989 bool SrcVec = SrcTy->isVectorTy();
990 bool DstVec = DestTy->isVectorTy();
992 Assert1(SrcVec == DstVec,
993 "UIToFP source and dest must both be vector or scalar", &I);
994 Assert1(SrcTy->isIntOrIntVectorTy(),
995 "UIToFP source must be integer or integer vector", &I);
996 Assert1(DestTy->isFPOrFPVectorTy(),
997 "UIToFP result must be FP or FP vector", &I);
999 if (SrcVec && DstVec)
1000 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1001 cast<VectorType>(DestTy)->getNumElements(),
1002 "UIToFP source and dest vector length mismatch", &I);
1004 visitInstruction(I);
1007 void Verifier::visitSIToFPInst(SIToFPInst &I) {
1008 // Get the source and destination types
1009 const Type *SrcTy = I.getOperand(0)->getType();
1010 const Type *DestTy = I.getType();
1012 bool SrcVec = SrcTy->isVectorTy();
1013 bool DstVec = DestTy->isVectorTy();
1015 Assert1(SrcVec == DstVec,
1016 "SIToFP source and dest must both be vector or scalar", &I);
1017 Assert1(SrcTy->isIntOrIntVectorTy(),
1018 "SIToFP source must be integer or integer vector", &I);
1019 Assert1(DestTy->isFPOrFPVectorTy(),
1020 "SIToFP result must be FP or FP vector", &I);
1022 if (SrcVec && DstVec)
1023 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1024 cast<VectorType>(DestTy)->getNumElements(),
1025 "SIToFP source and dest vector length mismatch", &I);
1027 visitInstruction(I);
1030 void Verifier::visitFPToUIInst(FPToUIInst &I) {
1031 // Get the source and destination types
1032 const Type *SrcTy = I.getOperand(0)->getType();
1033 const Type *DestTy = I.getType();
1035 bool SrcVec = SrcTy->isVectorTy();
1036 bool DstVec = DestTy->isVectorTy();
1038 Assert1(SrcVec == DstVec,
1039 "FPToUI source and dest must both be vector or scalar", &I);
1040 Assert1(SrcTy->isFPOrFPVectorTy(), "FPToUI source must be FP or FP vector",
1042 Assert1(DestTy->isIntOrIntVectorTy(),
1043 "FPToUI result must be integer or integer vector", &I);
1045 if (SrcVec && DstVec)
1046 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1047 cast<VectorType>(DestTy)->getNumElements(),
1048 "FPToUI source and dest vector length mismatch", &I);
1050 visitInstruction(I);
1053 void Verifier::visitFPToSIInst(FPToSIInst &I) {
1054 // Get the source and destination types
1055 const Type *SrcTy = I.getOperand(0)->getType();
1056 const Type *DestTy = I.getType();
1058 bool SrcVec = SrcTy->isVectorTy();
1059 bool DstVec = DestTy->isVectorTy();
1061 Assert1(SrcVec == DstVec,
1062 "FPToSI source and dest must both be vector or scalar", &I);
1063 Assert1(SrcTy->isFPOrFPVectorTy(),
1064 "FPToSI source must be FP or FP vector", &I);
1065 Assert1(DestTy->isIntOrIntVectorTy(),
1066 "FPToSI result must be integer or integer vector", &I);
1068 if (SrcVec && DstVec)
1069 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1070 cast<VectorType>(DestTy)->getNumElements(),
1071 "FPToSI source and dest vector length mismatch", &I);
1073 visitInstruction(I);
1076 void Verifier::visitPtrToIntInst(PtrToIntInst &I) {
1077 // Get the source and destination types
1078 const Type *SrcTy = I.getOperand(0)->getType();
1079 const Type *DestTy = I.getType();
1081 Assert1(SrcTy->isPointerTy(), "PtrToInt source must be pointer", &I);
1082 Assert1(DestTy->isIntegerTy(), "PtrToInt result must be integral", &I);
1084 visitInstruction(I);
1087 void Verifier::visitIntToPtrInst(IntToPtrInst &I) {
1088 // Get the source and destination types
1089 const Type *SrcTy = I.getOperand(0)->getType();
1090 const Type *DestTy = I.getType();
1092 Assert1(SrcTy->isIntegerTy(), "IntToPtr source must be an integral", &I);
1093 Assert1(DestTy->isPointerTy(), "IntToPtr result must be a pointer",&I);
1095 visitInstruction(I);
1098 void Verifier::visitBitCastInst(BitCastInst &I) {
1099 // Get the source and destination types
1100 const Type *SrcTy = I.getOperand(0)->getType();
1101 const Type *DestTy = I.getType();
1103 // Get the size of the types in bits, we'll need this later
1104 unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
1105 unsigned DestBitSize = DestTy->getPrimitiveSizeInBits();
1107 // BitCast implies a no-op cast of type only. No bits change.
1108 // However, you can't cast pointers to anything but pointers.
1109 Assert1(DestTy->isPointerTy() == DestTy->isPointerTy(),
1110 "Bitcast requires both operands to be pointer or neither", &I);
1111 Assert1(SrcBitSize == DestBitSize, "Bitcast requires types of same width",&I);
1113 // Disallow aggregates.
1114 Assert1(!SrcTy->isAggregateType(),
1115 "Bitcast operand must not be aggregate", &I);
1116 Assert1(!DestTy->isAggregateType(),
1117 "Bitcast type must not be aggregate", &I);
1119 visitInstruction(I);
1122 /// visitPHINode - Ensure that a PHI node is well formed.
1124 void Verifier::visitPHINode(PHINode &PN) {
1125 // Ensure that the PHI nodes are all grouped together at the top of the block.
1126 // This can be tested by checking whether the instruction before this is
1127 // either nonexistent (because this is begin()) or is a PHI node. If not,
1128 // then there is some other instruction before a PHI.
1129 Assert2(&PN == &PN.getParent()->front() ||
1130 isa<PHINode>(--BasicBlock::iterator(&PN)),
1131 "PHI nodes not grouped at top of basic block!",
1132 &PN, PN.getParent());
1134 // Check that all of the values of the PHI node have the same type as the
1135 // result, and that the incoming blocks are really basic blocks.
1136 for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i) {
1137 Assert1(PN.getType() == PN.getIncomingValue(i)->getType(),
1138 "PHI node operands are not the same type as the result!", &PN);
1139 Assert1(isa<BasicBlock>(PN.getOperand(
1140 PHINode::getOperandNumForIncomingBlock(i))),
1141 "PHI node incoming block is not a BasicBlock!", &PN);
1144 // All other PHI node constraints are checked in the visitBasicBlock method.
1146 visitInstruction(PN);
1149 void Verifier::VerifyCallSite(CallSite CS) {
1150 Instruction *I = CS.getInstruction();
1152 Assert1(CS.getCalledValue()->getType()->isPointerTy(),
1153 "Called function must be a pointer!", I);
1154 const PointerType *FPTy = cast<PointerType>(CS.getCalledValue()->getType());
1156 Assert1(FPTy->getElementType()->isFunctionTy(),
1157 "Called function is not pointer to function type!", I);
1158 const FunctionType *FTy = cast<FunctionType>(FPTy->getElementType());
1160 // Verify that the correct number of arguments are being passed
1161 if (FTy->isVarArg())
1162 Assert1(CS.arg_size() >= FTy->getNumParams(),
1163 "Called function requires more parameters than were provided!",I);
1165 Assert1(CS.arg_size() == FTy->getNumParams(),
1166 "Incorrect number of arguments passed to called function!", I);
1168 // Verify that all arguments to the call match the function type.
1169 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
1170 Assert3(CS.getArgument(i)->getType() == FTy->getParamType(i),
1171 "Call parameter type does not match function signature!",
1172 CS.getArgument(i), FTy->getParamType(i), I);
1174 const AttrListPtr &Attrs = CS.getAttributes();
1176 Assert1(VerifyAttributeCount(Attrs, CS.arg_size()),
1177 "Attributes after last parameter!", I);
1179 // Verify call attributes.
1180 VerifyFunctionAttrs(FTy, Attrs, I);
1182 if (FTy->isVarArg())
1183 // Check attributes on the varargs part.
1184 for (unsigned Idx = 1 + FTy->getNumParams(); Idx <= CS.arg_size(); ++Idx) {
1185 Attributes Attr = Attrs.getParamAttributes(Idx);
1187 VerifyParameterAttrs(Attr, CS.getArgument(Idx-1)->getType(), false, I);
1189 Attributes VArgI = Attr & Attribute::VarArgsIncompatible;
1190 Assert1(!VArgI, "Attribute " + Attribute::getAsString(VArgI) +
1191 " cannot be used for vararg call arguments!", I);
1194 // Verify that there's no metadata unless it's a direct call to an intrinsic.
1195 if (!CS.getCalledFunction() ||
1196 !CS.getCalledFunction()->getName().startswith("llvm.")) {
1197 for (FunctionType::param_iterator PI = FTy->param_begin(),
1198 PE = FTy->param_end(); PI != PE; ++PI)
1199 Assert1(!PI->get()->isMetadataTy(),
1200 "Function has metadata parameter but isn't an intrinsic", I);
1203 visitInstruction(*I);
1206 void Verifier::visitCallInst(CallInst &CI) {
1207 VerifyCallSite(&CI);
1209 if (Function *F = CI.getCalledFunction())
1210 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
1211 visitIntrinsicFunctionCall(ID, CI);
1214 void Verifier::visitInvokeInst(InvokeInst &II) {
1215 VerifyCallSite(&II);
1216 visitTerminatorInst(II);
1219 /// visitBinaryOperator - Check that both arguments to the binary operator are
1220 /// of the same type!
1222 void Verifier::visitBinaryOperator(BinaryOperator &B) {
1223 Assert1(B.getOperand(0)->getType() == B.getOperand(1)->getType(),
1224 "Both operands to a binary operator are not of the same type!", &B);
1226 switch (B.getOpcode()) {
1227 // Check that integer arithmetic operators are only used with
1228 // integral operands.
1229 case Instruction::Add:
1230 case Instruction::Sub:
1231 case Instruction::Mul:
1232 case Instruction::SDiv:
1233 case Instruction::UDiv:
1234 case Instruction::SRem:
1235 case Instruction::URem:
1236 Assert1(B.getType()->isIntOrIntVectorTy(),
1237 "Integer arithmetic operators only work with integral types!", &B);
1238 Assert1(B.getType() == B.getOperand(0)->getType(),
1239 "Integer arithmetic operators must have same type "
1240 "for operands and result!", &B);
1242 // Check that floating-point arithmetic operators are only used with
1243 // floating-point operands.
1244 case Instruction::FAdd:
1245 case Instruction::FSub:
1246 case Instruction::FMul:
1247 case Instruction::FDiv:
1248 case Instruction::FRem:
1249 Assert1(B.getType()->isFPOrFPVectorTy(),
1250 "Floating-point arithmetic operators only work with "
1251 "floating-point types!", &B);
1252 Assert1(B.getType() == B.getOperand(0)->getType(),
1253 "Floating-point arithmetic operators must have same type "
1254 "for operands and result!", &B);
1256 // Check that logical operators are only used with integral operands.
1257 case Instruction::And:
1258 case Instruction::Or:
1259 case Instruction::Xor:
1260 Assert1(B.getType()->isIntOrIntVectorTy(),
1261 "Logical operators only work with integral types!", &B);
1262 Assert1(B.getType() == B.getOperand(0)->getType(),
1263 "Logical operators must have same type for operands and result!",
1266 case Instruction::Shl:
1267 case Instruction::LShr:
1268 case Instruction::AShr:
1269 Assert1(B.getType()->isIntOrIntVectorTy(),
1270 "Shifts only work with integral types!", &B);
1271 Assert1(B.getType() == B.getOperand(0)->getType(),
1272 "Shift return type must be same as operands!", &B);
1275 llvm_unreachable("Unknown BinaryOperator opcode!");
1278 visitInstruction(B);
1281 void Verifier::visitICmpInst(ICmpInst& IC) {
1282 // Check that the operands are the same type
1283 const Type* Op0Ty = IC.getOperand(0)->getType();
1284 const Type* Op1Ty = IC.getOperand(1)->getType();
1285 Assert1(Op0Ty == Op1Ty,
1286 "Both operands to ICmp instruction are not of the same type!", &IC);
1287 // Check that the operands are the right type
1288 Assert1(Op0Ty->isIntOrIntVectorTy() || Op0Ty->isPointerTy(),
1289 "Invalid operand types for ICmp instruction", &IC);
1291 visitInstruction(IC);
1294 void Verifier::visitFCmpInst(FCmpInst& FC) {
1295 // Check that the operands are the same type
1296 const Type* Op0Ty = FC.getOperand(0)->getType();
1297 const Type* Op1Ty = FC.getOperand(1)->getType();
1298 Assert1(Op0Ty == Op1Ty,
1299 "Both operands to FCmp instruction are not of the same type!", &FC);
1300 // Check that the operands are the right type
1301 Assert1(Op0Ty->isFPOrFPVectorTy(),
1302 "Invalid operand types for FCmp instruction", &FC);
1303 visitInstruction(FC);
1306 void Verifier::visitExtractElementInst(ExtractElementInst &EI) {
1307 Assert1(ExtractElementInst::isValidOperands(EI.getOperand(0),
1309 "Invalid extractelement operands!", &EI);
1310 visitInstruction(EI);
1313 void Verifier::visitInsertElementInst(InsertElementInst &IE) {
1314 Assert1(InsertElementInst::isValidOperands(IE.getOperand(0),
1317 "Invalid insertelement operands!", &IE);
1318 visitInstruction(IE);
1321 void Verifier::visitShuffleVectorInst(ShuffleVectorInst &SV) {
1322 Assert1(ShuffleVectorInst::isValidOperands(SV.getOperand(0), SV.getOperand(1),
1324 "Invalid shufflevector operands!", &SV);
1325 visitInstruction(SV);
1328 void Verifier::visitGetElementPtrInst(GetElementPtrInst &GEP) {
1329 SmallVector<Value*, 16> Idxs(GEP.idx_begin(), GEP.idx_end());
1331 GetElementPtrInst::getIndexedType(GEP.getOperand(0)->getType(),
1332 Idxs.begin(), Idxs.end());
1333 Assert1(ElTy, "Invalid indices for GEP pointer type!", &GEP);
1334 Assert2(GEP.getType()->isPointerTy() &&
1335 cast<PointerType>(GEP.getType())->getElementType() == ElTy,
1336 "GEP is not of right type for indices!", &GEP, ElTy);
1337 visitInstruction(GEP);
1340 void Verifier::visitLoadInst(LoadInst &LI) {
1341 const PointerType *PTy = dyn_cast<PointerType>(LI.getOperand(0)->getType());
1342 Assert1(PTy, "Load operand must be a pointer.", &LI);
1343 const Type *ElTy = PTy->getElementType();
1344 Assert2(ElTy == LI.getType(),
1345 "Load result type does not match pointer operand type!", &LI, ElTy);
1346 visitInstruction(LI);
1349 void Verifier::visitStoreInst(StoreInst &SI) {
1350 const PointerType *PTy = dyn_cast<PointerType>(SI.getOperand(1)->getType());
1351 Assert1(PTy, "Store operand must be a pointer.", &SI);
1352 const Type *ElTy = PTy->getElementType();
1353 Assert2(ElTy == SI.getOperand(0)->getType(),
1354 "Stored value type does not match pointer operand type!",
1356 visitInstruction(SI);
1359 void Verifier::visitAllocaInst(AllocaInst &AI) {
1360 const PointerType *PTy = AI.getType();
1361 Assert1(PTy->getAddressSpace() == 0,
1362 "Allocation instruction pointer not in the generic address space!",
1364 Assert1(PTy->getElementType()->isSized(), "Cannot allocate unsized type",
1366 Assert1(AI.getArraySize()->getType()->isIntegerTy(),
1367 "Alloca array size must have integer type", &AI);
1368 visitInstruction(AI);
1371 void Verifier::visitExtractValueInst(ExtractValueInst &EVI) {
1372 Assert1(ExtractValueInst::getIndexedType(EVI.getAggregateOperand()->getType(),
1373 EVI.idx_begin(), EVI.idx_end()) ==
1375 "Invalid ExtractValueInst operands!", &EVI);
1377 visitInstruction(EVI);
1380 void Verifier::visitInsertValueInst(InsertValueInst &IVI) {
1381 Assert1(ExtractValueInst::getIndexedType(IVI.getAggregateOperand()->getType(),
1382 IVI.idx_begin(), IVI.idx_end()) ==
1383 IVI.getOperand(1)->getType(),
1384 "Invalid InsertValueInst operands!", &IVI);
1386 visitInstruction(IVI);
1389 /// verifyInstruction - Verify that an instruction is well formed.
1391 void Verifier::visitInstruction(Instruction &I) {
1392 BasicBlock *BB = I.getParent();
1393 Assert1(BB, "Instruction not embedded in basic block!", &I);
1395 if (!isa<PHINode>(I)) { // Check that non-phi nodes are not self referential
1396 for (Value::use_iterator UI = I.use_begin(), UE = I.use_end();
1398 Assert1(*UI != (User*)&I || !DT->isReachableFromEntry(BB),
1399 "Only PHI nodes may reference their own value!", &I);
1402 // Check that void typed values don't have names
1403 Assert1(!I.getType()->isVoidTy() || !I.hasName(),
1404 "Instruction has a name, but provides a void value!", &I);
1406 // Check that the return value of the instruction is either void or a legal
1408 Assert1(I.getType()->isVoidTy() ||
1409 I.getType()->isFirstClassType(),
1410 "Instruction returns a non-scalar type!", &I);
1412 // Check that the instruction doesn't produce metadata. Calls are already
1413 // checked against the callee type.
1414 Assert1(!I.getType()->isMetadataTy() ||
1415 isa<CallInst>(I) || isa<InvokeInst>(I),
1416 "Invalid use of metadata!", &I);
1418 // Check that all uses of the instruction, if they are instructions
1419 // themselves, actually have parent basic blocks. If the use is not an
1420 // instruction, it is an error!
1421 for (User::use_iterator UI = I.use_begin(), UE = I.use_end();
1423 if (Instruction *Used = dyn_cast<Instruction>(*UI))
1424 Assert2(Used->getParent() != 0, "Instruction referencing instruction not"
1425 " embedded in a basic block!", &I, Used);
1427 CheckFailed("Use of instruction is not an instruction!", *UI);
1432 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
1433 Assert1(I.getOperand(i) != 0, "Instruction has null operand!", &I);
1435 // Check to make sure that only first-class-values are operands to
1437 if (!I.getOperand(i)->getType()->isFirstClassType()) {
1438 Assert1(0, "Instruction operands must be first-class values!", &I);
1441 if (Function *F = dyn_cast<Function>(I.getOperand(i))) {
1442 // Check to make sure that the "address of" an intrinsic function is never
1444 Assert1(!F->isIntrinsic() || (i + 1 == e && isa<CallInst>(I)),
1445 "Cannot take the address of an intrinsic!", &I);
1446 Assert1(F->getParent() == Mod, "Referencing function in another module!",
1448 } else if (BasicBlock *OpBB = dyn_cast<BasicBlock>(I.getOperand(i))) {
1449 Assert1(OpBB->getParent() == BB->getParent(),
1450 "Referring to a basic block in another function!", &I);
1451 } else if (Argument *OpArg = dyn_cast<Argument>(I.getOperand(i))) {
1452 Assert1(OpArg->getParent() == BB->getParent(),
1453 "Referring to an argument in another function!", &I);
1454 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(I.getOperand(i))) {
1455 Assert1(GV->getParent() == Mod, "Referencing global in another module!",
1457 } else if (Instruction *Op = dyn_cast<Instruction>(I.getOperand(i))) {
1458 BasicBlock *OpBlock = Op->getParent();
1460 // Check that a definition dominates all of its uses.
1461 if (InvokeInst *II = dyn_cast<InvokeInst>(Op)) {
1462 // Invoke results are only usable in the normal destination, not in the
1463 // exceptional destination.
1464 BasicBlock *NormalDest = II->getNormalDest();
1466 Assert2(NormalDest != II->getUnwindDest(),
1467 "No uses of invoke possible due to dominance structure!",
1470 // PHI nodes differ from other nodes because they actually "use" the
1471 // value in the predecessor basic blocks they correspond to.
1472 BasicBlock *UseBlock = BB;
1473 if (isa<PHINode>(I))
1474 UseBlock = dyn_cast<BasicBlock>(I.getOperand(i+1));
1475 Assert2(UseBlock, "Invoke operand is PHI node with bad incoming-BB",
1478 if (isa<PHINode>(I) && UseBlock == OpBlock) {
1479 // Special case of a phi node in the normal destination or the unwind
1481 Assert2(BB == NormalDest || !DT->isReachableFromEntry(UseBlock),
1482 "Invoke result not available in the unwind destination!",
1485 Assert2(DT->dominates(NormalDest, UseBlock) ||
1486 !DT->isReachableFromEntry(UseBlock),
1487 "Invoke result does not dominate all uses!", Op, &I);
1489 // If the normal successor of an invoke instruction has multiple
1490 // predecessors, then the normal edge from the invoke is critical,
1491 // so the invoke value can only be live if the destination block
1492 // dominates all of it's predecessors (other than the invoke).
1493 if (!NormalDest->getSinglePredecessor() &&
1494 DT->isReachableFromEntry(UseBlock))
1495 // If it is used by something non-phi, then the other case is that
1496 // 'NormalDest' dominates all of its predecessors other than the
1497 // invoke. In this case, the invoke value can still be used.
1498 for (pred_iterator PI = pred_begin(NormalDest),
1499 E = pred_end(NormalDest); PI != E; ++PI)
1500 if (*PI != II->getParent() && !DT->dominates(NormalDest, *PI) &&
1501 DT->isReachableFromEntry(*PI)) {
1502 CheckFailed("Invoke result does not dominate all uses!", Op,&I);
1506 } else if (isa<PHINode>(I)) {
1507 // PHI nodes are more difficult than other nodes because they actually
1508 // "use" the value in the predecessor basic blocks they correspond to.
1509 BasicBlock *PredBB = dyn_cast<BasicBlock>(I.getOperand(i+1));
1510 Assert2(PredBB && (DT->dominates(OpBlock, PredBB) ||
1511 !DT->isReachableFromEntry(PredBB)),
1512 "Instruction does not dominate all uses!", Op, &I);
1514 if (OpBlock == BB) {
1515 // If they are in the same basic block, make sure that the definition
1516 // comes before the use.
1517 Assert2(InstsInThisBlock.count(Op) || !DT->isReachableFromEntry(BB),
1518 "Instruction does not dominate all uses!", Op, &I);
1521 // Definition must dominate use unless use is unreachable!
1522 Assert2(InstsInThisBlock.count(Op) || DT->dominates(Op, &I) ||
1523 !DT->isReachableFromEntry(BB),
1524 "Instruction does not dominate all uses!", Op, &I);
1526 } else if (isa<InlineAsm>(I.getOperand(i))) {
1527 Assert1((i + 1 == e && isa<CallInst>(I)) ||
1528 (i + 3 == e && isa<InvokeInst>(I)),
1529 "Cannot take the address of an inline asm!", &I);
1532 InstsInThisBlock.insert(&I);
1534 VerifyType(I.getType());
1537 /// VerifyType - Verify that a type is well formed.
1539 void Verifier::VerifyType(const Type *Ty) {
1540 if (!Types.insert(Ty)) return;
1542 Assert1(Context == &Ty->getContext(),
1543 "Type context does not match Module context!", Ty);
1545 switch (Ty->getTypeID()) {
1546 case Type::FunctionTyID: {
1547 const FunctionType *FTy = cast<FunctionType>(Ty);
1549 const Type *RetTy = FTy->getReturnType();
1550 Assert2(FunctionType::isValidReturnType(RetTy),
1551 "Function type with invalid return type", RetTy, FTy);
1554 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i) {
1555 const Type *ElTy = FTy->getParamType(i);
1556 Assert2(FunctionType::isValidArgumentType(ElTy),
1557 "Function type with invalid parameter type", ElTy, FTy);
1561 case Type::StructTyID: {
1562 const StructType *STy = cast<StructType>(Ty);
1563 for (unsigned i = 0, e = STy->getNumElements(); i != e; ++i) {
1564 const Type *ElTy = STy->getElementType(i);
1565 Assert2(StructType::isValidElementType(ElTy),
1566 "Structure type with invalid element type", ElTy, STy);
1570 case Type::UnionTyID: {
1571 const UnionType *UTy = cast<UnionType>(Ty);
1572 for (unsigned i = 0, e = UTy->getNumElements(); i != e; ++i) {
1573 const Type *ElTy = UTy->getElementType(i);
1574 Assert2(UnionType::isValidElementType(ElTy),
1575 "Union type with invalid element type", ElTy, UTy);
1579 case Type::ArrayTyID: {
1580 const ArrayType *ATy = cast<ArrayType>(Ty);
1581 Assert1(ArrayType::isValidElementType(ATy->getElementType()),
1582 "Array type with invalid element type", ATy);
1583 VerifyType(ATy->getElementType());
1585 case Type::PointerTyID: {
1586 const PointerType *PTy = cast<PointerType>(Ty);
1587 Assert1(PointerType::isValidElementType(PTy->getElementType()),
1588 "Pointer type with invalid element type", PTy);
1589 VerifyType(PTy->getElementType());
1591 case Type::VectorTyID: {
1592 const VectorType *VTy = cast<VectorType>(Ty);
1593 Assert1(VectorType::isValidElementType(VTy->getElementType()),
1594 "Vector type with invalid element type", VTy);
1595 VerifyType(VTy->getElementType());
1602 // Flags used by TableGen to mark intrinsic parameters with the
1603 // LLVMExtendedElementVectorType and LLVMTruncatedElementVectorType classes.
1604 static const unsigned ExtendedElementVectorType = 0x40000000;
1605 static const unsigned TruncatedElementVectorType = 0x20000000;
1607 /// visitIntrinsicFunction - Allow intrinsics to be verified in different ways.
1609 void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) {
1610 Function *IF = CI.getCalledFunction();
1611 Assert1(IF->isDeclaration(), "Intrinsic functions should never be defined!",
1614 #define GET_INTRINSIC_VERIFIER
1615 #include "llvm/Intrinsics.gen"
1616 #undef GET_INTRINSIC_VERIFIER
1618 // If the intrinsic takes MDNode arguments, verify that they are either global
1619 // or are local to *this* function.
1620 for (unsigned i = 0, e = CI.getNumArgOperands(); i != e; ++i)
1621 if (MDNode *MD = dyn_cast<MDNode>(CI.getArgOperand(i)))
1622 visitMDNode(*MD, CI.getParent()->getParent());
1627 case Intrinsic::dbg_declare: { // llvm.dbg.declare
1628 Assert1(CI.getArgOperand(0) && isa<MDNode>(CI.getArgOperand(0)),
1629 "invalid llvm.dbg.declare intrinsic call 1", &CI);
1630 MDNode *MD = cast<MDNode>(CI.getArgOperand(0));
1631 Assert1(MD->getNumOperands() == 1,
1632 "invalid llvm.dbg.declare intrinsic call 2", &CI);
1634 case Intrinsic::memcpy:
1635 case Intrinsic::memmove:
1636 case Intrinsic::memset:
1637 Assert1(isa<ConstantInt>(CI.getArgOperand(3)),
1638 "alignment argument of memory intrinsics must be a constant int",
1641 case Intrinsic::gcroot:
1642 case Intrinsic::gcwrite:
1643 case Intrinsic::gcread:
1644 if (ID == Intrinsic::gcroot) {
1646 dyn_cast<AllocaInst>(CI.getArgOperand(0)->stripPointerCasts());
1647 Assert1(AI && AI->getType()->getElementType()->isPointerTy(),
1648 "llvm.gcroot parameter #1 must be a pointer alloca.", &CI);
1649 Assert1(isa<Constant>(CI.getArgOperand(1)),
1650 "llvm.gcroot parameter #2 must be a constant.", &CI);
1653 Assert1(CI.getParent()->getParent()->hasGC(),
1654 "Enclosing function does not use GC.", &CI);
1656 case Intrinsic::init_trampoline:
1657 Assert1(isa<Function>(CI.getArgOperand(1)->stripPointerCasts()),
1658 "llvm.init_trampoline parameter #2 must resolve to a function.",
1661 case Intrinsic::prefetch:
1662 Assert1(isa<ConstantInt>(CI.getArgOperand(1)) &&
1663 isa<ConstantInt>(CI.getArgOperand(2)) &&
1664 cast<ConstantInt>(CI.getArgOperand(1))->getZExtValue() < 2 &&
1665 cast<ConstantInt>(CI.getArgOperand(2))->getZExtValue() < 4,
1666 "invalid arguments to llvm.prefetch",
1669 case Intrinsic::stackprotector:
1670 Assert1(isa<AllocaInst>(CI.getArgOperand(1)->stripPointerCasts()),
1671 "llvm.stackprotector parameter #2 must resolve to an alloca.",
1674 case Intrinsic::lifetime_start:
1675 case Intrinsic::lifetime_end:
1676 case Intrinsic::invariant_start:
1677 Assert1(isa<ConstantInt>(CI.getArgOperand(0)),
1678 "size argument of memory use markers must be a constant integer",
1681 case Intrinsic::invariant_end:
1682 Assert1(isa<ConstantInt>(CI.getArgOperand(1)),
1683 "llvm.invariant.end parameter #2 must be a constant integer", &CI);
1688 /// Produce a string to identify an intrinsic parameter or return value.
1689 /// The ArgNo value numbers the return values from 0 to NumRets-1 and the
1690 /// parameters beginning with NumRets.
1692 static std::string IntrinsicParam(unsigned ArgNo, unsigned NumRets) {
1693 if (ArgNo >= NumRets)
1694 return "Intrinsic parameter #" + utostr(ArgNo - NumRets);
1696 return "Intrinsic result type";
1697 return "Intrinsic result type #" + utostr(ArgNo);
1700 bool Verifier::PerformTypeCheck(Intrinsic::ID ID, Function *F, const Type *Ty,
1701 int VT, unsigned ArgNo, std::string &Suffix) {
1702 const FunctionType *FTy = F->getFunctionType();
1704 unsigned NumElts = 0;
1705 const Type *EltTy = Ty;
1706 const VectorType *VTy = dyn_cast<VectorType>(Ty);
1708 EltTy = VTy->getElementType();
1709 NumElts = VTy->getNumElements();
1712 const Type *RetTy = FTy->getReturnType();
1713 const StructType *ST = dyn_cast<StructType>(RetTy);
1714 unsigned NumRetVals;
1715 if (RetTy->isVoidTy())
1718 NumRetVals = ST->getNumElements();
1725 // Check flags that indicate a type that is an integral vector type with
1726 // elements that are larger or smaller than the elements of the matched
1728 if ((Match & (ExtendedElementVectorType |
1729 TruncatedElementVectorType)) != 0) {
1730 const IntegerType *IEltTy = dyn_cast<IntegerType>(EltTy);
1731 if (!VTy || !IEltTy) {
1732 CheckFailed(IntrinsicParam(ArgNo, NumRetVals) + " is not "
1733 "an integral vector type.", F);
1736 // Adjust the current Ty (in the opposite direction) rather than
1737 // the type being matched against.
1738 if ((Match & ExtendedElementVectorType) != 0) {
1739 if ((IEltTy->getBitWidth() & 1) != 0) {
1740 CheckFailed(IntrinsicParam(ArgNo, NumRetVals) + " vector "
1741 "element bit-width is odd.", F);
1744 Ty = VectorType::getTruncatedElementVectorType(VTy);
1746 Ty = VectorType::getExtendedElementVectorType(VTy);
1747 Match &= ~(ExtendedElementVectorType | TruncatedElementVectorType);
1750 if (Match <= static_cast<int>(NumRetVals - 1)) {
1752 RetTy = ST->getElementType(Match);
1755 CheckFailed(IntrinsicParam(ArgNo, NumRetVals) + " does not "
1756 "match return type.", F);
1760 if (Ty != FTy->getParamType(Match - NumRetVals)) {
1761 CheckFailed(IntrinsicParam(ArgNo, NumRetVals) + " does not "
1762 "match parameter %" + utostr(Match - NumRetVals) + ".", F);
1766 } else if (VT == MVT::iAny) {
1767 if (!EltTy->isIntegerTy()) {
1768 CheckFailed(IntrinsicParam(ArgNo, NumRetVals) + " is not "
1769 "an integer type.", F);
1773 unsigned GotBits = cast<IntegerType>(EltTy)->getBitWidth();
1777 Suffix += "v" + utostr(NumElts);
1779 Suffix += "i" + utostr(GotBits);
1781 // Check some constraints on various intrinsics.
1783 default: break; // Not everything needs to be checked.
1784 case Intrinsic::bswap:
1785 if (GotBits < 16 || GotBits % 16 != 0) {
1786 CheckFailed("Intrinsic requires even byte width argument", F);
1791 } else if (VT == MVT::fAny) {
1792 if (!EltTy->isFloatingPointTy()) {
1793 CheckFailed(IntrinsicParam(ArgNo, NumRetVals) + " is not "
1794 "a floating-point type.", F);
1801 Suffix += "v" + utostr(NumElts);
1803 Suffix += EVT::getEVT(EltTy).getEVTString();
1804 } else if (VT == MVT::vAny) {
1806 CheckFailed(IntrinsicParam(ArgNo, NumRetVals) + " is not a vector type.",
1810 Suffix += ".v" + utostr(NumElts) + EVT::getEVT(EltTy).getEVTString();
1811 } else if (VT == MVT::iPTR) {
1812 if (!Ty->isPointerTy()) {
1813 CheckFailed(IntrinsicParam(ArgNo, NumRetVals) + " is not a "
1814 "pointer and a pointer is required.", F);
1817 } else if (VT == MVT::iPTRAny) {
1818 // Outside of TableGen, we don't distinguish iPTRAny (to any address space)
1819 // and iPTR. In the verifier, we can not distinguish which case we have so
1820 // allow either case to be legal.
1821 if (const PointerType* PTyp = dyn_cast<PointerType>(Ty)) {
1822 EVT PointeeVT = EVT::getEVT(PTyp->getElementType(), true);
1823 if (PointeeVT == MVT::Other) {
1824 CheckFailed("Intrinsic has pointer to complex type.");
1827 Suffix += ".p" + utostr(PTyp->getAddressSpace()) +
1828 PointeeVT.getEVTString();
1830 CheckFailed(IntrinsicParam(ArgNo, NumRetVals) + " is not a "
1831 "pointer and a pointer is required.", F);
1834 } else if (EVT((MVT::SimpleValueType)VT).isVector()) {
1835 EVT VVT = EVT((MVT::SimpleValueType)VT);
1837 // If this is a vector argument, verify the number and type of elements.
1838 if (VVT.getVectorElementType() != EVT::getEVT(EltTy)) {
1839 CheckFailed("Intrinsic prototype has incorrect vector element type!", F);
1843 if (VVT.getVectorNumElements() != NumElts) {
1844 CheckFailed("Intrinsic prototype has incorrect number of "
1845 "vector elements!", F);
1848 } else if (EVT((MVT::SimpleValueType)VT).getTypeForEVT(Ty->getContext()) !=
1850 CheckFailed(IntrinsicParam(ArgNo, NumRetVals) + " is wrong!", F);
1852 } else if (EltTy != Ty) {
1853 CheckFailed(IntrinsicParam(ArgNo, NumRetVals) + " is a vector "
1854 "and a scalar is required.", F);
1861 /// VerifyIntrinsicPrototype - TableGen emits calls to this function into
1862 /// Intrinsics.gen. This implements a little state machine that verifies the
1863 /// prototype of intrinsics.
1864 void Verifier::VerifyIntrinsicPrototype(Intrinsic::ID ID, Function *F,
1865 unsigned NumRetVals,
1866 unsigned NumParams, ...) {
1868 va_start(VA, NumParams);
1869 const FunctionType *FTy = F->getFunctionType();
1871 // For overloaded intrinsics, the Suffix of the function name must match the
1872 // types of the arguments. This variable keeps track of the expected
1873 // suffix, to be checked at the end.
1876 if (FTy->getNumParams() + FTy->isVarArg() != NumParams) {
1877 CheckFailed("Intrinsic prototype has incorrect number of arguments!", F);
1881 const Type *Ty = FTy->getReturnType();
1882 const StructType *ST = dyn_cast<StructType>(Ty);
1884 if (NumRetVals == 0 && !Ty->isVoidTy()) {
1885 CheckFailed("Intrinsic should return void", F);
1889 // Verify the return types.
1890 if (ST && ST->getNumElements() != NumRetVals) {
1891 CheckFailed("Intrinsic prototype has incorrect number of return types!", F);
1895 for (unsigned ArgNo = 0; ArgNo != NumRetVals; ++ArgNo) {
1896 int VT = va_arg(VA, int); // An MVT::SimpleValueType when non-negative.
1898 if (ST) Ty = ST->getElementType(ArgNo);
1899 if (!PerformTypeCheck(ID, F, Ty, VT, ArgNo, Suffix))
1903 // Verify the parameter types.
1904 for (unsigned ArgNo = 0; ArgNo != NumParams; ++ArgNo) {
1905 int VT = va_arg(VA, int); // An MVT::SimpleValueType when non-negative.
1907 if (VT == MVT::isVoid && ArgNo > 0) {
1908 if (!FTy->isVarArg())
1909 CheckFailed("Intrinsic prototype has no '...'!", F);
1913 if (!PerformTypeCheck(ID, F, FTy->getParamType(ArgNo), VT,
1914 ArgNo + NumRetVals, Suffix))
1920 // For intrinsics without pointer arguments, if we computed a Suffix then the
1921 // intrinsic is overloaded and we need to make sure that the name of the
1922 // function is correct. We add the suffix to the name of the intrinsic and
1923 // compare against the given function name. If they are not the same, the
1924 // function name is invalid. This ensures that overloading of intrinsics
1925 // uses a sane and consistent naming convention. Note that intrinsics with
1926 // pointer argument may or may not be overloaded so we will check assuming it
1927 // has a suffix and not.
1928 if (!Suffix.empty()) {
1929 std::string Name(Intrinsic::getName(ID));
1930 if (Name + Suffix != F->getName()) {
1931 CheckFailed("Overloaded intrinsic has incorrect suffix: '" +
1932 F->getName().substr(Name.length()) + "'. It should be '" +
1937 // Check parameter attributes.
1938 Assert1(F->getAttributes() == Intrinsic::getAttributes(ID),
1939 "Intrinsic has wrong parameter attributes!", F);
1943 //===----------------------------------------------------------------------===//
1944 // Implement the public interfaces to this file...
1945 //===----------------------------------------------------------------------===//
1947 FunctionPass *llvm::createVerifierPass(VerifierFailureAction action) {
1948 return new Verifier(action);
1952 /// verifyFunction - Check a function for errors, printing messages on stderr.
1953 /// Return true if the function is corrupt.
1955 bool llvm::verifyFunction(const Function &f, VerifierFailureAction action) {
1956 Function &F = const_cast<Function&>(f);
1957 assert(!F.isDeclaration() && "Cannot verify external functions");
1959 FunctionPassManager FPM(F.getParent());
1960 Verifier *V = new Verifier(action);
1966 /// verifyModule - Check a module for errors, printing messages on stderr.
1967 /// Return true if the module is corrupt.
1969 bool llvm::verifyModule(const Module &M, VerifierFailureAction action,
1970 std::string *ErrorInfo) {
1972 Verifier *V = new Verifier(action);
1974 PM.run(const_cast<Module&>(M));
1976 if (ErrorInfo && V->Broken)
1977 *ErrorInfo = V->MessagesStr.str();