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/CallingConv.h"
50 #include "llvm/Constants.h"
51 #include "llvm/DerivedTypes.h"
52 #include "llvm/InlineAsm.h"
53 #include "llvm/IntrinsicInst.h"
54 #include "llvm/LLVMContext.h"
55 #include "llvm/Metadata.h"
56 #include "llvm/Module.h"
57 #include "llvm/Pass.h"
58 #include "llvm/PassManager.h"
59 #include "llvm/Analysis/Dominators.h"
60 #include "llvm/Assembly/Writer.h"
61 #include "llvm/CodeGen/ValueTypes.h"
62 #include "llvm/Support/CallSite.h"
63 #include "llvm/Support/CFG.h"
64 #include "llvm/Support/Debug.h"
65 #include "llvm/Support/InstVisitor.h"
66 #include "llvm/ADT/SetVector.h"
67 #include "llvm/ADT/SmallPtrSet.h"
68 #include "llvm/ADT/SmallVector.h"
69 #include "llvm/ADT/StringExtras.h"
70 #include "llvm/ADT/STLExtras.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(Attributes Attrs, Type *Ty,
300 bool isReturnValue, const Value *V);
301 void VerifyFunctionAttrs(FunctionType *FT, const AttrListPtr &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.hasLinkerPrivateWeakDefAutoLinkage() || GV.hasDefaultVisibility(),
403 "linker_private_weak_def_auto 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(Attributes Attrs, Type *Ty,
527 bool isReturnValue, const Value *V) {
528 if (Attrs == Attribute::None)
531 Attributes FnCheckAttr = Attrs & Attribute::FunctionOnly;
532 Assert1(!FnCheckAttr, "Attribute " + Attribute::getAsString(FnCheckAttr) +
533 " only applies to the function!", V);
536 Attributes RetI = Attrs & Attribute::ParameterOnly;
537 Assert1(!RetI, "Attribute " + Attribute::getAsString(RetI) +
538 " does not apply to return values!", V);
542 i < array_lengthof(Attribute::MutuallyIncompatible); ++i) {
543 Attributes MutI = Attrs & Attribute::MutuallyIncompatible[i];
544 Assert1(MutI.isEmptyOrSingleton(), "Attributes " +
545 Attribute::getAsString(MutI) + " are incompatible!", V);
548 Attributes TypeI = Attrs & Attribute::typeIncompatible(Ty);
549 Assert1(!TypeI, "Wrong type for attribute " +
550 Attribute::getAsString(TypeI), V);
552 Attributes ByValI = Attrs & Attribute::ByVal;
553 if (PointerType *PTy = dyn_cast<PointerType>(Ty)) {
554 Assert1(!ByValI || PTy->getElementType()->isSized(),
555 "Attribute " + Attribute::getAsString(ByValI) +
556 " does not support unsized types!", V);
559 "Attribute " + Attribute::getAsString(ByValI) +
560 " only applies to parameters with pointer type!", V);
564 // VerifyFunctionAttrs - Check parameter attributes against a function type.
565 // The value V is printed in error messages.
566 void Verifier::VerifyFunctionAttrs(FunctionType *FT,
567 const AttrListPtr &Attrs,
572 bool SawNest = false;
574 for (unsigned i = 0, e = Attrs.getNumSlots(); i != e; ++i) {
575 const AttributeWithIndex &Attr = Attrs.getSlot(i);
579 Ty = FT->getReturnType();
580 else if (Attr.Index-1 < FT->getNumParams())
581 Ty = FT->getParamType(Attr.Index-1);
583 break; // VarArgs attributes, verified elsewhere.
585 VerifyParameterAttrs(Attr.Attrs, Ty, Attr.Index == 0, V);
587 if (Attr.Attrs & Attribute::Nest) {
588 Assert1(!SawNest, "More than one parameter has attribute nest!", V);
592 if (Attr.Attrs & Attribute::StructRet)
593 Assert1(Attr.Index == 1, "Attribute sret not on first parameter!", V);
596 Attributes FAttrs = Attrs.getFnAttributes();
597 Attributes NotFn = FAttrs & (~Attribute::FunctionOnly);
598 Assert1(!NotFn, "Attribute " + Attribute::getAsString(NotFn) +
599 " does not apply to the function!", V);
602 i < array_lengthof(Attribute::MutuallyIncompatible); ++i) {
603 Attributes MutI = FAttrs & Attribute::MutuallyIncompatible[i];
604 Assert1(MutI.isEmptyOrSingleton(), "Attributes " +
605 Attribute::getAsString(MutI) + " are incompatible!", V);
609 static bool VerifyAttributeCount(const AttrListPtr &Attrs, unsigned Params) {
613 unsigned LastSlot = Attrs.getNumSlots() - 1;
614 unsigned LastIndex = Attrs.getSlot(LastSlot).Index;
615 if (LastIndex <= Params
616 || (LastIndex == (unsigned)~0
617 && (LastSlot == 0 || Attrs.getSlot(LastSlot - 1).Index <= Params)))
623 // visitFunction - Verify that a function is ok.
625 void Verifier::visitFunction(Function &F) {
626 // Check function arguments.
627 FunctionType *FT = F.getFunctionType();
628 unsigned NumArgs = F.arg_size();
630 Assert1(Context == &F.getContext(),
631 "Function context does not match Module context!", &F);
633 Assert1(!F.hasCommonLinkage(), "Functions may not have common linkage", &F);
634 Assert2(FT->getNumParams() == NumArgs,
635 "# formal arguments must match # of arguments for function type!",
637 Assert1(F.getReturnType()->isFirstClassType() ||
638 F.getReturnType()->isVoidTy() ||
639 F.getReturnType()->isStructTy(),
640 "Functions cannot return aggregate values!", &F);
642 Assert1(!F.hasStructRetAttr() || F.getReturnType()->isVoidTy(),
643 "Invalid struct return type!", &F);
645 const AttrListPtr &Attrs = F.getAttributes();
647 Assert1(VerifyAttributeCount(Attrs, FT->getNumParams()),
648 "Attributes after last parameter!", &F);
650 // Check function attributes.
651 VerifyFunctionAttrs(FT, Attrs, &F);
653 // Check that this function meets the restrictions on this calling convention.
654 switch (F.getCallingConv()) {
659 case CallingConv::Fast:
660 case CallingConv::Cold:
661 case CallingConv::X86_FastCall:
662 case CallingConv::X86_ThisCall:
663 case CallingConv::PTX_Kernel:
664 case CallingConv::PTX_Device:
665 Assert1(!F.isVarArg(),
666 "Varargs functions must have C calling conventions!", &F);
670 bool isLLVMdotName = F.getName().size() >= 5 &&
671 F.getName().substr(0, 5) == "llvm.";
673 // Check that the argument values match the function type for this function...
675 for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end();
677 Assert2(I->getType() == FT->getParamType(i),
678 "Argument value does not match function argument type!",
679 I, FT->getParamType(i));
680 Assert1(I->getType()->isFirstClassType(),
681 "Function arguments must have first-class types!", I);
683 Assert2(!I->getType()->isMetadataTy(),
684 "Function takes metadata but isn't an intrinsic", I, &F);
687 if (F.isMaterializable()) {
688 // Function has a body somewhere we can't see.
689 } else if (F.isDeclaration()) {
690 Assert1(F.hasExternalLinkage() || F.hasDLLImportLinkage() ||
691 F.hasExternalWeakLinkage(),
692 "invalid linkage type for function declaration", &F);
694 // Verify that this function (which has a body) is not named "llvm.*". It
695 // is not legal to define intrinsics.
696 Assert1(!isLLVMdotName, "llvm intrinsics cannot be defined!", &F);
698 // Check the entry node
699 BasicBlock *Entry = &F.getEntryBlock();
700 Assert1(pred_begin(Entry) == pred_end(Entry),
701 "Entry block to function must not have predecessors!", Entry);
703 // The address of the entry block cannot be taken, unless it is dead.
704 if (Entry->hasAddressTaken()) {
705 Assert1(!BlockAddress::get(Entry)->isConstantUsed(),
706 "blockaddress may not be used with the entry block!", Entry);
710 // If this function is actually an intrinsic, verify that it is only used in
711 // direct call/invokes, never having its "address taken".
712 if (F.getIntrinsicID()) {
714 if (F.hasAddressTaken(&U))
715 Assert1(0, "Invalid user of intrinsic instruction!", U);
719 // verifyBasicBlock - Verify that a basic block is well formed...
721 void Verifier::visitBasicBlock(BasicBlock &BB) {
722 InstsInThisBlock.clear();
724 // Ensure that basic blocks have terminators!
725 Assert1(BB.getTerminator(), "Basic Block does not have terminator!", &BB);
727 // Check constraints that this basic block imposes on all of the PHI nodes in
729 if (isa<PHINode>(BB.front())) {
730 SmallVector<BasicBlock*, 8> Preds(pred_begin(&BB), pred_end(&BB));
731 SmallVector<std::pair<BasicBlock*, Value*>, 8> Values;
732 std::sort(Preds.begin(), Preds.end());
734 for (BasicBlock::iterator I = BB.begin(); (PN = dyn_cast<PHINode>(I));++I) {
735 // Ensure that PHI nodes have at least one entry!
736 Assert1(PN->getNumIncomingValues() != 0,
737 "PHI nodes must have at least one entry. If the block is dead, "
738 "the PHI should be removed!", PN);
739 Assert1(PN->getNumIncomingValues() == Preds.size(),
740 "PHINode should have one entry for each predecessor of its "
741 "parent basic block!", PN);
743 // Get and sort all incoming values in the PHI node...
745 Values.reserve(PN->getNumIncomingValues());
746 for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i)
747 Values.push_back(std::make_pair(PN->getIncomingBlock(i),
748 PN->getIncomingValue(i)));
749 std::sort(Values.begin(), Values.end());
751 for (unsigned i = 0, e = Values.size(); i != e; ++i) {
752 // Check to make sure that if there is more than one entry for a
753 // particular basic block in this PHI node, that the incoming values are
756 Assert4(i == 0 || Values[i].first != Values[i-1].first ||
757 Values[i].second == Values[i-1].second,
758 "PHI node has multiple entries for the same basic block with "
759 "different incoming values!", PN, Values[i].first,
760 Values[i].second, Values[i-1].second);
762 // Check to make sure that the predecessors and PHI node entries are
764 Assert3(Values[i].first == Preds[i],
765 "PHI node entries do not match predecessors!", PN,
766 Values[i].first, Preds[i]);
772 void Verifier::visitTerminatorInst(TerminatorInst &I) {
773 // Ensure that terminators only exist at the end of the basic block.
774 Assert1(&I == I.getParent()->getTerminator(),
775 "Terminator found in the middle of a basic block!", I.getParent());
779 void Verifier::visitBranchInst(BranchInst &BI) {
780 if (BI.isConditional()) {
781 Assert2(BI.getCondition()->getType()->isIntegerTy(1),
782 "Branch condition is not 'i1' type!", &BI, BI.getCondition());
784 visitTerminatorInst(BI);
787 void Verifier::visitReturnInst(ReturnInst &RI) {
788 Function *F = RI.getParent()->getParent();
789 unsigned N = RI.getNumOperands();
790 if (F->getReturnType()->isVoidTy())
792 "Found return instr that returns non-void in Function of void "
793 "return type!", &RI, F->getReturnType());
795 Assert2(N == 1 && F->getReturnType() == RI.getOperand(0)->getType(),
796 "Function return type does not match operand "
797 "type of return inst!", &RI, F->getReturnType());
799 // Check to make sure that the return value has necessary properties for
801 visitTerminatorInst(RI);
804 void Verifier::visitSwitchInst(SwitchInst &SI) {
805 // Check to make sure that all of the constants in the switch instruction
806 // have the same type as the switched-on value.
807 Type *SwitchTy = SI.getCondition()->getType();
808 IntegerType *IntTy = cast<IntegerType>(SwitchTy);
810 std::map<ConstantRangesSet::Range, unsigned> RangeSetMap;
811 for (SwitchInst::CaseIt i = SI.case_begin(), e = SI.case_end(); i != e; ++i) {
812 ConstantRangesSet RS = i.getCaseValueEx();
813 for (unsigned ri = 0, rie = RS.getNumItems(); ri < rie; ++ri) {
814 ConstantRangesSet::Range r = RS.getItem(ri);
815 Assert1(r.Low->getBitWidth() == IntTy->getBitWidth(),
816 "Switch constants must all be same type as switch value!", &SI);
817 Assert1(r.High->getBitWidth() == IntTy->getBitWidth(),
818 "Switch constants must all be same type as switch value!", &SI);
820 RangeSetMap[r] = i.getCaseIndex();
824 CRSBuilder::RangeIterator errItem;
825 if (!Builder.verify(errItem)) {
826 unsigned CaseIndex = RangeSetMap[errItem->first];
827 SwitchInst::CaseIt i(&SI, CaseIndex);
828 Assert2(false, "Duplicate integer as switch case", &SI, i.getCaseValueEx());
831 visitTerminatorInst(SI);
834 void Verifier::visitIndirectBrInst(IndirectBrInst &BI) {
835 Assert1(BI.getAddress()->getType()->isPointerTy(),
836 "Indirectbr operand must have pointer type!", &BI);
837 for (unsigned i = 0, e = BI.getNumDestinations(); i != e; ++i)
838 Assert1(BI.getDestination(i)->getType()->isLabelTy(),
839 "Indirectbr destinations must all have pointer type!", &BI);
841 visitTerminatorInst(BI);
844 void Verifier::visitSelectInst(SelectInst &SI) {
845 Assert1(!SelectInst::areInvalidOperands(SI.getOperand(0), SI.getOperand(1),
847 "Invalid operands for select instruction!", &SI);
849 Assert1(SI.getTrueValue()->getType() == SI.getType(),
850 "Select values must have same type as select instruction!", &SI);
851 visitInstruction(SI);
854 /// visitUserOp1 - User defined operators shouldn't live beyond the lifetime of
855 /// a pass, if any exist, it's an error.
857 void Verifier::visitUserOp1(Instruction &I) {
858 Assert1(0, "User-defined operators should not live outside of a pass!", &I);
861 void Verifier::visitTruncInst(TruncInst &I) {
862 // Get the source and destination types
863 Type *SrcTy = I.getOperand(0)->getType();
864 Type *DestTy = I.getType();
866 // Get the size of the types in bits, we'll need this later
867 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
868 unsigned DestBitSize = DestTy->getScalarSizeInBits();
870 Assert1(SrcTy->isIntOrIntVectorTy(), "Trunc only operates on integer", &I);
871 Assert1(DestTy->isIntOrIntVectorTy(), "Trunc only produces integer", &I);
872 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
873 "trunc source and destination must both be a vector or neither", &I);
874 Assert1(SrcBitSize > DestBitSize,"DestTy too big for Trunc", &I);
879 void Verifier::visitZExtInst(ZExtInst &I) {
880 // Get the source and destination types
881 Type *SrcTy = I.getOperand(0)->getType();
882 Type *DestTy = I.getType();
884 // Get the size of the types in bits, we'll need this later
885 Assert1(SrcTy->isIntOrIntVectorTy(), "ZExt only operates on integer", &I);
886 Assert1(DestTy->isIntOrIntVectorTy(), "ZExt only produces an integer", &I);
887 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
888 "zext source and destination must both be a vector or neither", &I);
889 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
890 unsigned DestBitSize = DestTy->getScalarSizeInBits();
892 Assert1(SrcBitSize < DestBitSize,"Type too small for ZExt", &I);
897 void Verifier::visitSExtInst(SExtInst &I) {
898 // Get the source and destination types
899 Type *SrcTy = I.getOperand(0)->getType();
900 Type *DestTy = I.getType();
902 // Get the size of the types in bits, we'll need this later
903 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
904 unsigned DestBitSize = DestTy->getScalarSizeInBits();
906 Assert1(SrcTy->isIntOrIntVectorTy(), "SExt only operates on integer", &I);
907 Assert1(DestTy->isIntOrIntVectorTy(), "SExt only produces an integer", &I);
908 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
909 "sext source and destination must both be a vector or neither", &I);
910 Assert1(SrcBitSize < DestBitSize,"Type too small for SExt", &I);
915 void Verifier::visitFPTruncInst(FPTruncInst &I) {
916 // Get the source and destination types
917 Type *SrcTy = I.getOperand(0)->getType();
918 Type *DestTy = I.getType();
919 // Get the size of the types in bits, we'll need this later
920 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
921 unsigned DestBitSize = DestTy->getScalarSizeInBits();
923 Assert1(SrcTy->isFPOrFPVectorTy(),"FPTrunc only operates on FP", &I);
924 Assert1(DestTy->isFPOrFPVectorTy(),"FPTrunc only produces an FP", &I);
925 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
926 "fptrunc source and destination must both be a vector or neither",&I);
927 Assert1(SrcBitSize > DestBitSize,"DestTy too big for FPTrunc", &I);
932 void Verifier::visitFPExtInst(FPExtInst &I) {
933 // Get the source and destination types
934 Type *SrcTy = I.getOperand(0)->getType();
935 Type *DestTy = I.getType();
937 // Get the size of the types in bits, we'll need this later
938 unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
939 unsigned DestBitSize = DestTy->getScalarSizeInBits();
941 Assert1(SrcTy->isFPOrFPVectorTy(),"FPExt only operates on FP", &I);
942 Assert1(DestTy->isFPOrFPVectorTy(),"FPExt only produces an FP", &I);
943 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
944 "fpext source and destination must both be a vector or neither", &I);
945 Assert1(SrcBitSize < DestBitSize,"DestTy too small for FPExt", &I);
950 void Verifier::visitUIToFPInst(UIToFPInst &I) {
951 // Get the source and destination types
952 Type *SrcTy = I.getOperand(0)->getType();
953 Type *DestTy = I.getType();
955 bool SrcVec = SrcTy->isVectorTy();
956 bool DstVec = DestTy->isVectorTy();
958 Assert1(SrcVec == DstVec,
959 "UIToFP source and dest must both be vector or scalar", &I);
960 Assert1(SrcTy->isIntOrIntVectorTy(),
961 "UIToFP source must be integer or integer vector", &I);
962 Assert1(DestTy->isFPOrFPVectorTy(),
963 "UIToFP result must be FP or FP vector", &I);
965 if (SrcVec && DstVec)
966 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
967 cast<VectorType>(DestTy)->getNumElements(),
968 "UIToFP source and dest vector length mismatch", &I);
973 void Verifier::visitSIToFPInst(SIToFPInst &I) {
974 // Get the source and destination types
975 Type *SrcTy = I.getOperand(0)->getType();
976 Type *DestTy = I.getType();
978 bool SrcVec = SrcTy->isVectorTy();
979 bool DstVec = DestTy->isVectorTy();
981 Assert1(SrcVec == DstVec,
982 "SIToFP source and dest must both be vector or scalar", &I);
983 Assert1(SrcTy->isIntOrIntVectorTy(),
984 "SIToFP source must be integer or integer vector", &I);
985 Assert1(DestTy->isFPOrFPVectorTy(),
986 "SIToFP result must be FP or FP vector", &I);
988 if (SrcVec && DstVec)
989 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
990 cast<VectorType>(DestTy)->getNumElements(),
991 "SIToFP source and dest vector length mismatch", &I);
996 void Verifier::visitFPToUIInst(FPToUIInst &I) {
997 // Get the source and destination types
998 Type *SrcTy = I.getOperand(0)->getType();
999 Type *DestTy = I.getType();
1001 bool SrcVec = SrcTy->isVectorTy();
1002 bool DstVec = DestTy->isVectorTy();
1004 Assert1(SrcVec == DstVec,
1005 "FPToUI source and dest must both be vector or scalar", &I);
1006 Assert1(SrcTy->isFPOrFPVectorTy(), "FPToUI source must be FP or FP vector",
1008 Assert1(DestTy->isIntOrIntVectorTy(),
1009 "FPToUI result must be integer or integer vector", &I);
1011 if (SrcVec && DstVec)
1012 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1013 cast<VectorType>(DestTy)->getNumElements(),
1014 "FPToUI source and dest vector length mismatch", &I);
1016 visitInstruction(I);
1019 void Verifier::visitFPToSIInst(FPToSIInst &I) {
1020 // Get the source and destination types
1021 Type *SrcTy = I.getOperand(0)->getType();
1022 Type *DestTy = I.getType();
1024 bool SrcVec = SrcTy->isVectorTy();
1025 bool DstVec = DestTy->isVectorTy();
1027 Assert1(SrcVec == DstVec,
1028 "FPToSI source and dest must both be vector or scalar", &I);
1029 Assert1(SrcTy->isFPOrFPVectorTy(),
1030 "FPToSI source must be FP or FP vector", &I);
1031 Assert1(DestTy->isIntOrIntVectorTy(),
1032 "FPToSI result must be integer or integer vector", &I);
1034 if (SrcVec && DstVec)
1035 Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
1036 cast<VectorType>(DestTy)->getNumElements(),
1037 "FPToSI source and dest vector length mismatch", &I);
1039 visitInstruction(I);
1042 void Verifier::visitPtrToIntInst(PtrToIntInst &I) {
1043 // Get the source and destination types
1044 Type *SrcTy = I.getOperand(0)->getType();
1045 Type *DestTy = I.getType();
1047 Assert1(SrcTy->getScalarType()->isPointerTy(),
1048 "PtrToInt source must be pointer", &I);
1049 Assert1(DestTy->getScalarType()->isIntegerTy(),
1050 "PtrToInt result must be integral", &I);
1051 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1052 "PtrToInt type mismatch", &I);
1054 if (SrcTy->isVectorTy()) {
1055 VectorType *VSrc = dyn_cast<VectorType>(SrcTy);
1056 VectorType *VDest = dyn_cast<VectorType>(DestTy);
1057 Assert1(VSrc->getNumElements() == VDest->getNumElements(),
1058 "PtrToInt Vector width mismatch", &I);
1061 visitInstruction(I);
1064 void Verifier::visitIntToPtrInst(IntToPtrInst &I) {
1065 // Get the source and destination types
1066 Type *SrcTy = I.getOperand(0)->getType();
1067 Type *DestTy = I.getType();
1069 Assert1(SrcTy->getScalarType()->isIntegerTy(),
1070 "IntToPtr source must be an integral", &I);
1071 Assert1(DestTy->getScalarType()->isPointerTy(),
1072 "IntToPtr result must be a pointer",&I);
1073 Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
1074 "IntToPtr type mismatch", &I);
1075 if (SrcTy->isVectorTy()) {
1076 VectorType *VSrc = dyn_cast<VectorType>(SrcTy);
1077 VectorType *VDest = dyn_cast<VectorType>(DestTy);
1078 Assert1(VSrc->getNumElements() == VDest->getNumElements(),
1079 "IntToPtr Vector width mismatch", &I);
1081 visitInstruction(I);
1084 void Verifier::visitBitCastInst(BitCastInst &I) {
1085 // Get the source and destination types
1086 Type *SrcTy = I.getOperand(0)->getType();
1087 Type *DestTy = I.getType();
1089 // Get the size of the types in bits, we'll need this later
1090 unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
1091 unsigned DestBitSize = DestTy->getPrimitiveSizeInBits();
1093 // BitCast implies a no-op cast of type only. No bits change.
1094 // However, you can't cast pointers to anything but pointers.
1095 Assert1(DestTy->isPointerTy() == DestTy->isPointerTy(),
1096 "Bitcast requires both operands to be pointer or neither", &I);
1097 Assert1(SrcBitSize == DestBitSize, "Bitcast requires types of same width",&I);
1099 // Disallow aggregates.
1100 Assert1(!SrcTy->isAggregateType(),
1101 "Bitcast operand must not be aggregate", &I);
1102 Assert1(!DestTy->isAggregateType(),
1103 "Bitcast type must not be aggregate", &I);
1105 visitInstruction(I);
1108 /// visitPHINode - Ensure that a PHI node is well formed.
1110 void Verifier::visitPHINode(PHINode &PN) {
1111 // Ensure that the PHI nodes are all grouped together at the top of the block.
1112 // This can be tested by checking whether the instruction before this is
1113 // either nonexistent (because this is begin()) or is a PHI node. If not,
1114 // then there is some other instruction before a PHI.
1115 Assert2(&PN == &PN.getParent()->front() ||
1116 isa<PHINode>(--BasicBlock::iterator(&PN)),
1117 "PHI nodes not grouped at top of basic block!",
1118 &PN, PN.getParent());
1120 // Check that all of the values of the PHI node have the same type as the
1121 // result, and that the incoming blocks are really basic blocks.
1122 for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i) {
1123 Assert1(PN.getType() == PN.getIncomingValue(i)->getType(),
1124 "PHI node operands are not the same type as the result!", &PN);
1127 // All other PHI node constraints are checked in the visitBasicBlock method.
1129 visitInstruction(PN);
1132 void Verifier::VerifyCallSite(CallSite CS) {
1133 Instruction *I = CS.getInstruction();
1135 Assert1(CS.getCalledValue()->getType()->isPointerTy(),
1136 "Called function must be a pointer!", I);
1137 PointerType *FPTy = cast<PointerType>(CS.getCalledValue()->getType());
1139 Assert1(FPTy->getElementType()->isFunctionTy(),
1140 "Called function is not pointer to function type!", I);
1141 FunctionType *FTy = cast<FunctionType>(FPTy->getElementType());
1143 // Verify that the correct number of arguments are being passed
1144 if (FTy->isVarArg())
1145 Assert1(CS.arg_size() >= FTy->getNumParams(),
1146 "Called function requires more parameters than were provided!",I);
1148 Assert1(CS.arg_size() == FTy->getNumParams(),
1149 "Incorrect number of arguments passed to called function!", I);
1151 // Verify that all arguments to the call match the function type.
1152 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
1153 Assert3(CS.getArgument(i)->getType() == FTy->getParamType(i),
1154 "Call parameter type does not match function signature!",
1155 CS.getArgument(i), FTy->getParamType(i), I);
1157 const AttrListPtr &Attrs = CS.getAttributes();
1159 Assert1(VerifyAttributeCount(Attrs, CS.arg_size()),
1160 "Attributes after last parameter!", I);
1162 // Verify call attributes.
1163 VerifyFunctionAttrs(FTy, Attrs, I);
1165 if (FTy->isVarArg())
1166 // Check attributes on the varargs part.
1167 for (unsigned Idx = 1 + FTy->getNumParams(); Idx <= CS.arg_size(); ++Idx) {
1168 Attributes Attr = Attrs.getParamAttributes(Idx);
1170 VerifyParameterAttrs(Attr, CS.getArgument(Idx-1)->getType(), false, I);
1172 Attributes VArgI = Attr & Attribute::VarArgsIncompatible;
1173 Assert1(!VArgI, "Attribute " + Attribute::getAsString(VArgI) +
1174 " cannot be used for vararg call arguments!", I);
1177 // Verify that there's no metadata unless it's a direct call to an intrinsic.
1178 if (CS.getCalledFunction() == 0 ||
1179 !CS.getCalledFunction()->getName().startswith("llvm.")) {
1180 for (FunctionType::param_iterator PI = FTy->param_begin(),
1181 PE = FTy->param_end(); PI != PE; ++PI)
1182 Assert1(!(*PI)->isMetadataTy(),
1183 "Function has metadata parameter but isn't an intrinsic", I);
1186 visitInstruction(*I);
1189 void Verifier::visitCallInst(CallInst &CI) {
1190 VerifyCallSite(&CI);
1192 if (Function *F = CI.getCalledFunction())
1193 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
1194 visitIntrinsicFunctionCall(ID, CI);
1197 void Verifier::visitInvokeInst(InvokeInst &II) {
1198 VerifyCallSite(&II);
1200 // Verify that there is a landingpad instruction as the first non-PHI
1201 // instruction of the 'unwind' destination.
1202 Assert1(II.getUnwindDest()->isLandingPad(),
1203 "The unwind destination does not have a landingpad instruction!",&II);
1205 visitTerminatorInst(II);
1208 /// visitBinaryOperator - Check that both arguments to the binary operator are
1209 /// of the same type!
1211 void Verifier::visitBinaryOperator(BinaryOperator &B) {
1212 Assert1(B.getOperand(0)->getType() == B.getOperand(1)->getType(),
1213 "Both operands to a binary operator are not of the same type!", &B);
1215 switch (B.getOpcode()) {
1216 // Check that integer arithmetic operators are only used with
1217 // integral operands.
1218 case Instruction::Add:
1219 case Instruction::Sub:
1220 case Instruction::Mul:
1221 case Instruction::SDiv:
1222 case Instruction::UDiv:
1223 case Instruction::SRem:
1224 case Instruction::URem:
1225 Assert1(B.getType()->isIntOrIntVectorTy(),
1226 "Integer arithmetic operators only work with integral types!", &B);
1227 Assert1(B.getType() == B.getOperand(0)->getType(),
1228 "Integer arithmetic operators must have same type "
1229 "for operands and result!", &B);
1231 // Check that floating-point arithmetic operators are only used with
1232 // floating-point operands.
1233 case Instruction::FAdd:
1234 case Instruction::FSub:
1235 case Instruction::FMul:
1236 case Instruction::FDiv:
1237 case Instruction::FRem:
1238 Assert1(B.getType()->isFPOrFPVectorTy(),
1239 "Floating-point arithmetic operators only work with "
1240 "floating-point types!", &B);
1241 Assert1(B.getType() == B.getOperand(0)->getType(),
1242 "Floating-point arithmetic operators must have same type "
1243 "for operands and result!", &B);
1245 // Check that logical operators are only used with integral operands.
1246 case Instruction::And:
1247 case Instruction::Or:
1248 case Instruction::Xor:
1249 Assert1(B.getType()->isIntOrIntVectorTy(),
1250 "Logical operators only work with integral types!", &B);
1251 Assert1(B.getType() == B.getOperand(0)->getType(),
1252 "Logical operators must have same type for operands and result!",
1255 case Instruction::Shl:
1256 case Instruction::LShr:
1257 case Instruction::AShr:
1258 Assert1(B.getType()->isIntOrIntVectorTy(),
1259 "Shifts only work with integral types!", &B);
1260 Assert1(B.getType() == B.getOperand(0)->getType(),
1261 "Shift return type must be same as operands!", &B);
1264 llvm_unreachable("Unknown BinaryOperator opcode!");
1267 visitInstruction(B);
1270 void Verifier::visitICmpInst(ICmpInst &IC) {
1271 // Check that the operands are the same type
1272 Type *Op0Ty = IC.getOperand(0)->getType();
1273 Type *Op1Ty = IC.getOperand(1)->getType();
1274 Assert1(Op0Ty == Op1Ty,
1275 "Both operands to ICmp instruction are not of the same type!", &IC);
1276 // Check that the operands are the right type
1277 Assert1(Op0Ty->isIntOrIntVectorTy() || Op0Ty->getScalarType()->isPointerTy(),
1278 "Invalid operand types for ICmp instruction", &IC);
1279 // Check that the predicate is valid.
1280 Assert1(IC.getPredicate() >= CmpInst::FIRST_ICMP_PREDICATE &&
1281 IC.getPredicate() <= CmpInst::LAST_ICMP_PREDICATE,
1282 "Invalid predicate in ICmp instruction!", &IC);
1284 visitInstruction(IC);
1287 void Verifier::visitFCmpInst(FCmpInst &FC) {
1288 // Check that the operands are the same type
1289 Type *Op0Ty = FC.getOperand(0)->getType();
1290 Type *Op1Ty = FC.getOperand(1)->getType();
1291 Assert1(Op0Ty == Op1Ty,
1292 "Both operands to FCmp instruction are not of the same type!", &FC);
1293 // Check that the operands are the right type
1294 Assert1(Op0Ty->isFPOrFPVectorTy(),
1295 "Invalid operand types for FCmp instruction", &FC);
1296 // Check that the predicate is valid.
1297 Assert1(FC.getPredicate() >= CmpInst::FIRST_FCMP_PREDICATE &&
1298 FC.getPredicate() <= CmpInst::LAST_FCMP_PREDICATE,
1299 "Invalid predicate in FCmp instruction!", &FC);
1301 visitInstruction(FC);
1304 void Verifier::visitExtractElementInst(ExtractElementInst &EI) {
1305 Assert1(ExtractElementInst::isValidOperands(EI.getOperand(0),
1307 "Invalid extractelement operands!", &EI);
1308 visitInstruction(EI);
1311 void Verifier::visitInsertElementInst(InsertElementInst &IE) {
1312 Assert1(InsertElementInst::isValidOperands(IE.getOperand(0),
1315 "Invalid insertelement operands!", &IE);
1316 visitInstruction(IE);
1319 void Verifier::visitShuffleVectorInst(ShuffleVectorInst &SV) {
1320 Assert1(ShuffleVectorInst::isValidOperands(SV.getOperand(0), SV.getOperand(1),
1322 "Invalid shufflevector operands!", &SV);
1323 visitInstruction(SV);
1326 void Verifier::visitGetElementPtrInst(GetElementPtrInst &GEP) {
1327 Type *TargetTy = GEP.getPointerOperandType()->getScalarType();
1329 Assert1(isa<PointerType>(TargetTy),
1330 "GEP base pointer is not a vector or a vector of pointers", &GEP);
1331 Assert1(cast<PointerType>(TargetTy)->getElementType()->isSized(),
1332 "GEP into unsized type!", &GEP);
1334 SmallVector<Value*, 16> Idxs(GEP.idx_begin(), GEP.idx_end());
1336 GetElementPtrInst::getIndexedType(GEP.getPointerOperandType(), Idxs);
1337 Assert1(ElTy, "Invalid indices for GEP pointer type!", &GEP);
1339 if (GEP.getPointerOperandType()->isPointerTy()) {
1340 // Validate GEPs with scalar indices.
1341 Assert2(GEP.getType()->isPointerTy() &&
1342 cast<PointerType>(GEP.getType())->getElementType() == ElTy,
1343 "GEP is not of right type for indices!", &GEP, ElTy);
1345 // Validate GEPs with a vector index.
1346 Assert1(Idxs.size() == 1, "Invalid number of indices!", &GEP);
1347 Value *Index = Idxs[0];
1348 Type *IndexTy = Index->getType();
1349 Assert1(IndexTy->isVectorTy(),
1350 "Vector GEP must have vector indices!", &GEP);
1351 Assert1(GEP.getType()->isVectorTy(),
1352 "Vector GEP must return a vector value", &GEP);
1353 Type *ElemPtr = cast<VectorType>(GEP.getType())->getElementType();
1354 Assert1(ElemPtr->isPointerTy(),
1355 "Vector GEP pointer operand is not a pointer!", &GEP);
1356 unsigned IndexWidth = cast<VectorType>(IndexTy)->getNumElements();
1357 unsigned GepWidth = cast<VectorType>(GEP.getType())->getNumElements();
1358 Assert1(IndexWidth == GepWidth, "Invalid GEP index vector width", &GEP);
1359 Assert1(ElTy == cast<PointerType>(ElemPtr)->getElementType(),
1360 "Vector GEP type does not match pointer type!", &GEP);
1362 visitInstruction(GEP);
1365 void Verifier::visitLoadInst(LoadInst &LI) {
1366 PointerType *PTy = dyn_cast<PointerType>(LI.getOperand(0)->getType());
1367 Assert1(PTy, "Load operand must be a pointer.", &LI);
1368 Type *ElTy = PTy->getElementType();
1369 Assert2(ElTy == LI.getType(),
1370 "Load result type does not match pointer operand type!", &LI, ElTy);
1371 if (LI.isAtomic()) {
1372 Assert1(LI.getOrdering() != Release && LI.getOrdering() != AcquireRelease,
1373 "Load cannot have Release ordering", &LI);
1374 Assert1(LI.getAlignment() != 0,
1375 "Atomic load must specify explicit alignment", &LI);
1377 Assert1(LI.getSynchScope() == CrossThread,
1378 "Non-atomic load cannot have SynchronizationScope specified", &LI);
1381 if (MDNode *Range = LI.getMetadata(LLVMContext::MD_range)) {
1382 unsigned NumOperands = Range->getNumOperands();
1383 Assert1(NumOperands % 2 == 0, "Unfinished range!", Range);
1384 unsigned NumRanges = NumOperands / 2;
1385 Assert1(NumRanges >= 1, "It should have at least one range!", Range);
1386 for (unsigned i = 0; i < NumRanges; ++i) {
1387 ConstantInt *Low = dyn_cast<ConstantInt>(Range->getOperand(2*i));
1388 Assert1(Low, "The lower limit must be an integer!", Low);
1389 ConstantInt *High = dyn_cast<ConstantInt>(Range->getOperand(2*i + 1));
1390 Assert1(High, "The upper limit must be an integer!", High);
1391 Assert1(High->getType() == Low->getType() &&
1392 High->getType() == ElTy, "Range types must match load type!",
1394 Assert1(High->getValue() != Low->getValue(), "Range must not be empty!",
1399 visitInstruction(LI);
1402 void Verifier::visitStoreInst(StoreInst &SI) {
1403 PointerType *PTy = dyn_cast<PointerType>(SI.getOperand(1)->getType());
1404 Assert1(PTy, "Store operand must be a pointer.", &SI);
1405 Type *ElTy = PTy->getElementType();
1406 Assert2(ElTy == SI.getOperand(0)->getType(),
1407 "Stored value type does not match pointer operand type!",
1409 if (SI.isAtomic()) {
1410 Assert1(SI.getOrdering() != Acquire && SI.getOrdering() != AcquireRelease,
1411 "Store cannot have Acquire ordering", &SI);
1412 Assert1(SI.getAlignment() != 0,
1413 "Atomic store must specify explicit alignment", &SI);
1415 Assert1(SI.getSynchScope() == CrossThread,
1416 "Non-atomic store cannot have SynchronizationScope specified", &SI);
1418 visitInstruction(SI);
1421 void Verifier::visitAllocaInst(AllocaInst &AI) {
1422 PointerType *PTy = AI.getType();
1423 Assert1(PTy->getAddressSpace() == 0,
1424 "Allocation instruction pointer not in the generic address space!",
1426 Assert1(PTy->getElementType()->isSized(), "Cannot allocate unsized type",
1428 Assert1(AI.getArraySize()->getType()->isIntegerTy(),
1429 "Alloca array size must have integer type", &AI);
1430 visitInstruction(AI);
1433 void Verifier::visitAtomicCmpXchgInst(AtomicCmpXchgInst &CXI) {
1434 Assert1(CXI.getOrdering() != NotAtomic,
1435 "cmpxchg instructions must be atomic.", &CXI);
1436 Assert1(CXI.getOrdering() != Unordered,
1437 "cmpxchg instructions cannot be unordered.", &CXI);
1438 PointerType *PTy = dyn_cast<PointerType>(CXI.getOperand(0)->getType());
1439 Assert1(PTy, "First cmpxchg operand must be a pointer.", &CXI);
1440 Type *ElTy = PTy->getElementType();
1441 Assert2(ElTy == CXI.getOperand(1)->getType(),
1442 "Expected value type does not match pointer operand type!",
1444 Assert2(ElTy == CXI.getOperand(2)->getType(),
1445 "Stored value type does not match pointer operand type!",
1447 visitInstruction(CXI);
1450 void Verifier::visitAtomicRMWInst(AtomicRMWInst &RMWI) {
1451 Assert1(RMWI.getOrdering() != NotAtomic,
1452 "atomicrmw instructions must be atomic.", &RMWI);
1453 Assert1(RMWI.getOrdering() != Unordered,
1454 "atomicrmw instructions cannot be unordered.", &RMWI);
1455 PointerType *PTy = dyn_cast<PointerType>(RMWI.getOperand(0)->getType());
1456 Assert1(PTy, "First atomicrmw operand must be a pointer.", &RMWI);
1457 Type *ElTy = PTy->getElementType();
1458 Assert2(ElTy == RMWI.getOperand(1)->getType(),
1459 "Argument value type does not match pointer operand type!",
1461 Assert1(AtomicRMWInst::FIRST_BINOP <= RMWI.getOperation() &&
1462 RMWI.getOperation() <= AtomicRMWInst::LAST_BINOP,
1463 "Invalid binary operation!", &RMWI);
1464 visitInstruction(RMWI);
1467 void Verifier::visitFenceInst(FenceInst &FI) {
1468 const AtomicOrdering Ordering = FI.getOrdering();
1469 Assert1(Ordering == Acquire || Ordering == Release ||
1470 Ordering == AcquireRelease || Ordering == SequentiallyConsistent,
1471 "fence instructions may only have "
1472 "acquire, release, acq_rel, or seq_cst ordering.", &FI);
1473 visitInstruction(FI);
1476 void Verifier::visitExtractValueInst(ExtractValueInst &EVI) {
1477 Assert1(ExtractValueInst::getIndexedType(EVI.getAggregateOperand()->getType(),
1478 EVI.getIndices()) ==
1480 "Invalid ExtractValueInst operands!", &EVI);
1482 visitInstruction(EVI);
1485 void Verifier::visitInsertValueInst(InsertValueInst &IVI) {
1486 Assert1(ExtractValueInst::getIndexedType(IVI.getAggregateOperand()->getType(),
1487 IVI.getIndices()) ==
1488 IVI.getOperand(1)->getType(),
1489 "Invalid InsertValueInst operands!", &IVI);
1491 visitInstruction(IVI);
1494 void Verifier::visitLandingPadInst(LandingPadInst &LPI) {
1495 BasicBlock *BB = LPI.getParent();
1497 // The landingpad instruction is ill-formed if it doesn't have any clauses and
1499 Assert1(LPI.getNumClauses() > 0 || LPI.isCleanup(),
1500 "LandingPadInst needs at least one clause or to be a cleanup.", &LPI);
1502 // The landingpad instruction defines its parent as a landing pad block. The
1503 // landing pad block may be branched to only by the unwind edge of an invoke.
1504 for (pred_iterator I = pred_begin(BB), E = pred_end(BB); I != E; ++I) {
1505 const InvokeInst *II = dyn_cast<InvokeInst>((*I)->getTerminator());
1506 Assert1(II && II->getUnwindDest() == BB,
1507 "Block containing LandingPadInst must be jumped to "
1508 "only by the unwind edge of an invoke.", &LPI);
1511 // The landingpad instruction must be the first non-PHI instruction in the
1513 Assert1(LPI.getParent()->getLandingPadInst() == &LPI,
1514 "LandingPadInst not the first non-PHI instruction in the block.",
1517 // The personality functions for all landingpad instructions within the same
1518 // function should match.
1520 Assert1(LPI.getPersonalityFn() == PersonalityFn,
1521 "Personality function doesn't match others in function", &LPI);
1522 PersonalityFn = LPI.getPersonalityFn();
1524 // All operands must be constants.
1525 Assert1(isa<Constant>(PersonalityFn), "Personality function is not constant!",
1527 for (unsigned i = 0, e = LPI.getNumClauses(); i < e; ++i) {
1528 Value *Clause = LPI.getClause(i);
1529 Assert1(isa<Constant>(Clause), "Clause is not constant!", &LPI);
1530 if (LPI.isCatch(i)) {
1531 Assert1(isa<PointerType>(Clause->getType()),
1532 "Catch operand does not have pointer type!", &LPI);
1534 Assert1(LPI.isFilter(i), "Clause is neither catch nor filter!", &LPI);
1535 Assert1(isa<ConstantArray>(Clause) || isa<ConstantAggregateZero>(Clause),
1536 "Filter operand is not an array of constants!", &LPI);
1540 visitInstruction(LPI);
1543 void Verifier::verifyDominatesUse(Instruction &I, unsigned i) {
1544 Instruction *Op = cast<Instruction>(I.getOperand(i));
1545 BasicBlock *BB = I.getParent();
1546 BasicBlock *OpBlock = Op->getParent();
1547 PHINode *PN = dyn_cast<PHINode>(&I);
1549 // DT can handle non phi instructions for us.
1551 // Definition must dominate use unless use is unreachable!
1552 Assert2(InstsInThisBlock.count(Op) || !DT->isReachableFromEntry(BB) ||
1553 DT->dominates(Op, &I),
1554 "Instruction does not dominate all uses!", Op, &I);
1558 // Check that a definition dominates all of its uses.
1559 if (InvokeInst *II = dyn_cast<InvokeInst>(Op)) {
1560 // Invoke results are only usable in the normal destination, not in the
1561 // exceptional destination.
1562 BasicBlock *NormalDest = II->getNormalDest();
1565 // PHI nodes differ from other nodes because they actually "use" the
1566 // value in the predecessor basic blocks they correspond to.
1567 BasicBlock *UseBlock = BB;
1568 unsigned j = PHINode::getIncomingValueNumForOperand(i);
1569 UseBlock = PN->getIncomingBlock(j);
1570 Assert2(UseBlock, "Invoke operand is PHI node with bad incoming-BB",
1573 if (UseBlock == OpBlock) {
1574 // Special case of a phi node in the normal destination or the unwind
1576 Assert2(BB == NormalDest || !DT->isReachableFromEntry(UseBlock),
1577 "Invoke result not available in the unwind destination!",
1580 Assert2(DT->dominates(II, UseBlock) ||
1581 !DT->isReachableFromEntry(UseBlock),
1582 "Invoke result does not dominate all uses!", Op, &I);
1586 // PHI nodes are more difficult than other nodes because they actually
1587 // "use" the value in the predecessor basic blocks they correspond to.
1588 unsigned j = PHINode::getIncomingValueNumForOperand(i);
1589 BasicBlock *PredBB = PN->getIncomingBlock(j);
1590 Assert2(PredBB && (DT->dominates(OpBlock, PredBB) ||
1591 !DT->isReachableFromEntry(PredBB)),
1592 "Instruction does not dominate all uses!", Op, &I);
1595 /// verifyInstruction - Verify that an instruction is well formed.
1597 void Verifier::visitInstruction(Instruction &I) {
1598 BasicBlock *BB = I.getParent();
1599 Assert1(BB, "Instruction not embedded in basic block!", &I);
1601 if (!isa<PHINode>(I)) { // Check that non-phi nodes are not self referential
1602 for (Value::use_iterator UI = I.use_begin(), UE = I.use_end();
1604 Assert1(*UI != (User*)&I || !DT->isReachableFromEntry(BB),
1605 "Only PHI nodes may reference their own value!", &I);
1608 // Check that void typed values don't have names
1609 Assert1(!I.getType()->isVoidTy() || !I.hasName(),
1610 "Instruction has a name, but provides a void value!", &I);
1612 // Check that the return value of the instruction is either void or a legal
1614 Assert1(I.getType()->isVoidTy() ||
1615 I.getType()->isFirstClassType(),
1616 "Instruction returns a non-scalar type!", &I);
1618 // Check that the instruction doesn't produce metadata. Calls are already
1619 // checked against the callee type.
1620 Assert1(!I.getType()->isMetadataTy() ||
1621 isa<CallInst>(I) || isa<InvokeInst>(I),
1622 "Invalid use of metadata!", &I);
1624 // Check that all uses of the instruction, if they are instructions
1625 // themselves, actually have parent basic blocks. If the use is not an
1626 // instruction, it is an error!
1627 for (User::use_iterator UI = I.use_begin(), UE = I.use_end();
1629 if (Instruction *Used = dyn_cast<Instruction>(*UI))
1630 Assert2(Used->getParent() != 0, "Instruction referencing instruction not"
1631 " embedded in a basic block!", &I, Used);
1633 CheckFailed("Use of instruction is not an instruction!", *UI);
1638 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
1639 Assert1(I.getOperand(i) != 0, "Instruction has null operand!", &I);
1641 // Check to make sure that only first-class-values are operands to
1643 if (!I.getOperand(i)->getType()->isFirstClassType()) {
1644 Assert1(0, "Instruction operands must be first-class values!", &I);
1647 if (Function *F = dyn_cast<Function>(I.getOperand(i))) {
1648 // Check to make sure that the "address of" an intrinsic function is never
1650 Assert1(!F->isIntrinsic() || (i + 1 == e && isa<CallInst>(I)),
1651 "Cannot take the address of an intrinsic!", &I);
1652 Assert1(F->getParent() == Mod, "Referencing function in another module!",
1654 } else if (BasicBlock *OpBB = dyn_cast<BasicBlock>(I.getOperand(i))) {
1655 Assert1(OpBB->getParent() == BB->getParent(),
1656 "Referring to a basic block in another function!", &I);
1657 } else if (Argument *OpArg = dyn_cast<Argument>(I.getOperand(i))) {
1658 Assert1(OpArg->getParent() == BB->getParent(),
1659 "Referring to an argument in another function!", &I);
1660 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(I.getOperand(i))) {
1661 Assert1(GV->getParent() == Mod, "Referencing global in another module!",
1663 } else if (isa<Instruction>(I.getOperand(i))) {
1664 verifyDominatesUse(I, i);
1665 } else if (isa<InlineAsm>(I.getOperand(i))) {
1666 Assert1((i + 1 == e && isa<CallInst>(I)) ||
1667 (i + 3 == e && isa<InvokeInst>(I)),
1668 "Cannot take the address of an inline asm!", &I);
1672 if (MDNode *MD = I.getMetadata(LLVMContext::MD_fpmath)) {
1673 Assert1(I.getType()->isFPOrFPVectorTy(),
1674 "fpmath requires a floating point result!", &I);
1675 Assert1(MD->getNumOperands() == 1, "fpmath takes one operand!", &I);
1676 Value *Op0 = MD->getOperand(0);
1677 if (ConstantFP *CFP0 = dyn_cast_or_null<ConstantFP>(Op0)) {
1678 APFloat Accuracy = CFP0->getValueAPF();
1679 Assert1(Accuracy.isNormal() && !Accuracy.isNegative(),
1680 "fpmath accuracy not a positive number!", &I);
1682 Assert1(false, "invalid fpmath accuracy!", &I);
1686 MDNode *MD = I.getMetadata(LLVMContext::MD_range);
1687 Assert1(!MD || isa<LoadInst>(I), "Ranges are only for loads!", &I);
1689 InstsInThisBlock.insert(&I);
1692 /// VerifyIntrinsicType - Verify that the specified type (which comes from an
1693 /// intrinsic argument or return value) matches the type constraints specified
1694 /// by the .td file (e.g. an "any integer" argument really is an integer).
1696 /// This return true on error but does not print a message.
1697 bool Verifier::VerifyIntrinsicType(Type *Ty,
1698 ArrayRef<Intrinsic::IITDescriptor> &Infos,
1699 SmallVectorImpl<Type*> &ArgTys) {
1700 using namespace Intrinsic;
1702 // If we ran out of descriptors, there are too many arguments.
1703 if (Infos.empty()) return true;
1704 IITDescriptor D = Infos.front();
1705 Infos = Infos.slice(1);
1708 case IITDescriptor::Void: return !Ty->isVoidTy();
1709 case IITDescriptor::MMX: return !Ty->isX86_MMXTy();
1710 case IITDescriptor::Metadata: return !Ty->isMetadataTy();
1711 case IITDescriptor::Float: return !Ty->isFloatTy();
1712 case IITDescriptor::Double: return !Ty->isDoubleTy();
1713 case IITDescriptor::Integer: return !Ty->isIntegerTy(D.Integer_Width);
1714 case IITDescriptor::Vector: {
1715 VectorType *VT = dyn_cast<VectorType>(Ty);
1716 return VT == 0 || VT->getNumElements() != D.Vector_Width ||
1717 VerifyIntrinsicType(VT->getElementType(), Infos, ArgTys);
1719 case IITDescriptor::Pointer: {
1720 PointerType *PT = dyn_cast<PointerType>(Ty);
1721 return PT == 0 || PT->getAddressSpace() != D.Pointer_AddressSpace ||
1722 VerifyIntrinsicType(PT->getElementType(), Infos, ArgTys);
1725 case IITDescriptor::Struct: {
1726 StructType *ST = dyn_cast<StructType>(Ty);
1727 if (ST == 0 || ST->getNumElements() != D.Struct_NumElements)
1730 for (unsigned i = 0, e = D.Struct_NumElements; i != e; ++i)
1731 if (VerifyIntrinsicType(ST->getElementType(i), Infos, ArgTys))
1736 case IITDescriptor::Argument:
1737 // Two cases here - If this is the second occurrance of an argument, verify
1738 // that the later instance matches the previous instance.
1739 if (D.getArgumentNumber() < ArgTys.size())
1740 return Ty != ArgTys[D.getArgumentNumber()];
1742 // Otherwise, if this is the first instance of an argument, record it and
1743 // verify the "Any" kind.
1744 assert(D.getArgumentNumber() == ArgTys.size() && "Table consistency error");
1745 ArgTys.push_back(Ty);
1747 switch (D.getArgumentKind()) {
1748 case IITDescriptor::AK_AnyInteger: return !Ty->isIntOrIntVectorTy();
1749 case IITDescriptor::AK_AnyFloat: return !Ty->isFPOrFPVectorTy();
1750 case IITDescriptor::AK_AnyVector: return !isa<VectorType>(Ty);
1751 case IITDescriptor::AK_AnyPointer: return !isa<PointerType>(Ty);
1753 llvm_unreachable("all argument kinds not covered");
1755 case IITDescriptor::ExtendVecArgument:
1756 // This may only be used when referring to a previous vector argument.
1757 return D.getArgumentNumber() >= ArgTys.size() ||
1758 !isa<VectorType>(ArgTys[D.getArgumentNumber()]) ||
1759 VectorType::getExtendedElementVectorType(
1760 cast<VectorType>(ArgTys[D.getArgumentNumber()])) != Ty;
1762 case IITDescriptor::TruncVecArgument:
1763 // This may only be used when referring to a previous vector argument.
1764 return D.getArgumentNumber() >= ArgTys.size() ||
1765 !isa<VectorType>(ArgTys[D.getArgumentNumber()]) ||
1766 VectorType::getTruncatedElementVectorType(
1767 cast<VectorType>(ArgTys[D.getArgumentNumber()])) != Ty;
1769 llvm_unreachable("unhandled");
1772 /// visitIntrinsicFunction - Allow intrinsics to be verified in different ways.
1774 void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) {
1775 Function *IF = CI.getCalledFunction();
1776 Assert1(IF->isDeclaration(), "Intrinsic functions should never be defined!",
1779 // Verify that the intrinsic prototype lines up with what the .td files
1781 FunctionType *IFTy = IF->getFunctionType();
1782 Assert1(!IFTy->isVarArg(), "Intrinsic prototypes are not varargs", IF);
1784 SmallVector<Intrinsic::IITDescriptor, 8> Table;
1785 getIntrinsicInfoTableEntries(ID, Table);
1786 ArrayRef<Intrinsic::IITDescriptor> TableRef = Table;
1788 SmallVector<Type *, 4> ArgTys;
1789 Assert1(!VerifyIntrinsicType(IFTy->getReturnType(), TableRef, ArgTys),
1790 "Intrinsic has incorrect return type!", IF);
1791 for (unsigned i = 0, e = IFTy->getNumParams(); i != e; ++i)
1792 Assert1(!VerifyIntrinsicType(IFTy->getParamType(i), TableRef, ArgTys),
1793 "Intrinsic has incorrect argument type!", IF);
1794 Assert1(TableRef.empty(), "Intrinsic has too few arguments!", IF);
1796 // Now that we have the intrinsic ID and the actual argument types (and we
1797 // know they are legal for the intrinsic!) get the intrinsic name through the
1798 // usual means. This allows us to verify the mangling of argument types into
1800 Assert1(Intrinsic::getName(ID, ArgTys) == IF->getName(),
1801 "Intrinsic name not mangled correctly for type arguments!", IF);
1803 // If the intrinsic takes MDNode arguments, verify that they are either global
1804 // or are local to *this* function.
1805 for (unsigned i = 0, e = CI.getNumArgOperands(); i != e; ++i)
1806 if (MDNode *MD = dyn_cast<MDNode>(CI.getArgOperand(i)))
1807 visitMDNode(*MD, CI.getParent()->getParent());
1812 case Intrinsic::ctlz: // llvm.ctlz
1813 case Intrinsic::cttz: // llvm.cttz
1814 Assert1(isa<ConstantInt>(CI.getArgOperand(1)),
1815 "is_zero_undef argument of bit counting intrinsics must be a "
1816 "constant int", &CI);
1818 case Intrinsic::dbg_declare: { // llvm.dbg.declare
1819 Assert1(CI.getArgOperand(0) && isa<MDNode>(CI.getArgOperand(0)),
1820 "invalid llvm.dbg.declare intrinsic call 1", &CI);
1821 MDNode *MD = cast<MDNode>(CI.getArgOperand(0));
1822 Assert1(MD->getNumOperands() == 1,
1823 "invalid llvm.dbg.declare intrinsic call 2", &CI);
1825 case Intrinsic::memcpy:
1826 case Intrinsic::memmove:
1827 case Intrinsic::memset:
1828 Assert1(isa<ConstantInt>(CI.getArgOperand(3)),
1829 "alignment argument of memory intrinsics must be a constant int",
1831 Assert1(isa<ConstantInt>(CI.getArgOperand(4)),
1832 "isvolatile argument of memory intrinsics must be a constant int",
1835 case Intrinsic::gcroot:
1836 case Intrinsic::gcwrite:
1837 case Intrinsic::gcread:
1838 if (ID == Intrinsic::gcroot) {
1840 dyn_cast<AllocaInst>(CI.getArgOperand(0)->stripPointerCasts());
1841 Assert1(AI, "llvm.gcroot parameter #1 must be an alloca.", &CI);
1842 Assert1(isa<Constant>(CI.getArgOperand(1)),
1843 "llvm.gcroot parameter #2 must be a constant.", &CI);
1844 if (!AI->getType()->getElementType()->isPointerTy()) {
1845 Assert1(!isa<ConstantPointerNull>(CI.getArgOperand(1)),
1846 "llvm.gcroot parameter #1 must either be a pointer alloca, "
1847 "or argument #2 must be a non-null constant.", &CI);
1851 Assert1(CI.getParent()->getParent()->hasGC(),
1852 "Enclosing function does not use GC.", &CI);
1854 case Intrinsic::init_trampoline:
1855 Assert1(isa<Function>(CI.getArgOperand(1)->stripPointerCasts()),
1856 "llvm.init_trampoline parameter #2 must resolve to a function.",
1859 case Intrinsic::prefetch:
1860 Assert1(isa<ConstantInt>(CI.getArgOperand(1)) &&
1861 isa<ConstantInt>(CI.getArgOperand(2)) &&
1862 cast<ConstantInt>(CI.getArgOperand(1))->getZExtValue() < 2 &&
1863 cast<ConstantInt>(CI.getArgOperand(2))->getZExtValue() < 4,
1864 "invalid arguments to llvm.prefetch",
1867 case Intrinsic::stackprotector:
1868 Assert1(isa<AllocaInst>(CI.getArgOperand(1)->stripPointerCasts()),
1869 "llvm.stackprotector parameter #2 must resolve to an alloca.",
1872 case Intrinsic::lifetime_start:
1873 case Intrinsic::lifetime_end:
1874 case Intrinsic::invariant_start:
1875 Assert1(isa<ConstantInt>(CI.getArgOperand(0)),
1876 "size argument of memory use markers must be a constant integer",
1879 case Intrinsic::invariant_end:
1880 Assert1(isa<ConstantInt>(CI.getArgOperand(1)),
1881 "llvm.invariant.end parameter #2 must be a constant integer", &CI);
1886 //===----------------------------------------------------------------------===//
1887 // Implement the public interfaces to this file...
1888 //===----------------------------------------------------------------------===//
1890 FunctionPass *llvm::createVerifierPass(VerifierFailureAction action) {
1891 return new Verifier(action);
1895 /// verifyFunction - Check a function for errors, printing messages on stderr.
1896 /// Return true if the function is corrupt.
1898 bool llvm::verifyFunction(const Function &f, VerifierFailureAction action) {
1899 Function &F = const_cast<Function&>(f);
1900 assert(!F.isDeclaration() && "Cannot verify external functions");
1902 FunctionPassManager FPM(F.getParent());
1903 Verifier *V = new Verifier(action);
1909 /// verifyModule - Check a module for errors, printing messages on stderr.
1910 /// Return true if the module is corrupt.
1912 bool llvm::verifyModule(const Module &M, VerifierFailureAction action,
1913 std::string *ErrorInfo) {
1915 Verifier *V = new Verifier(action);
1917 PM.run(const_cast<Module&>(M));
1919 if (ErrorInfo && V->Broken)
1920 *ErrorInfo = V->MessagesStr.str();