1 //===-- Verifier.cpp - Implement the Module Verifier -------------*- C++ -*-==//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source 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 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 int %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 // . Function's 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/Assembly/Writer.h"
44 #include "llvm/Constants.h"
45 #include "llvm/Pass.h"
46 #include "llvm/Module.h"
47 #include "llvm/ModuleProvider.h"
48 #include "llvm/DerivedTypes.h"
49 #include "llvm/Instructions.h"
50 #include "llvm/Intrinsics.h"
51 #include "llvm/PassManager.h"
52 #include "llvm/SymbolTable.h"
53 #include "llvm/Analysis/Dominators.h"
54 #include "llvm/Support/CFG.h"
55 #include "llvm/Support/InstVisitor.h"
56 #include "Support/STLExtras.h"
61 namespace { // Anonymous namespace for class
63 struct Verifier : public FunctionPass, InstVisitor<Verifier> {
64 bool Broken; // Is this module found to be broken?
65 bool RealPass; // Are we not being run by a PassManager?
66 VerifierFailureAction action;
67 // What to do if verification fails.
68 Module *Mod; // Module we are verifying right now
69 DominatorSet *DS; // Dominator set, caution can be null!
70 std::stringstream msgs; // A stringstream to collect messages
73 : Broken(false), RealPass(true), action(AbortProcessAction),
74 DS(0), msgs( std::ios_base::app | std::ios_base::out ) {}
75 Verifier( VerifierFailureAction ctn )
76 : Broken(false), RealPass(true), action(ctn), DS(0),
77 msgs( std::ios_base::app | std::ios_base::out ) {}
79 : Broken(false), RealPass(true),
80 action( AB ? AbortProcessAction : PrintMessageAction), DS(0),
81 msgs( std::ios_base::app | std::ios_base::out ) {}
82 Verifier(DominatorSet &ds)
83 : Broken(false), RealPass(false), action(PrintMessageAction),
84 DS(&ds), msgs( std::ios_base::app | std::ios_base::out ) {}
87 bool doInitialization(Module &M) {
89 verifySymbolTable(M.getSymbolTable());
91 // If this is a real pass, in a pass manager, we must abort before
92 // returning back to the pass manager, or else the pass manager may try to
93 // run other passes on the broken module.
99 bool runOnFunction(Function &F) {
100 // Get dominator information if we are being run by PassManager
101 if (RealPass) DS = &getAnalysis<DominatorSet>();
104 // If this is a real pass, in a pass manager, we must abort before
105 // returning back to the pass manager, or else the pass manager may try to
106 // run other passes on the broken module.
113 bool doFinalization(Module &M) {
114 // Scan through, checking all of the external function's linkage now...
115 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
116 visitGlobalValue(*I);
118 for (Module::giterator I = M.gbegin(), E = M.gend(); I != E; ++I)
119 visitGlobalValue(*I);
121 // If the module is broken, abort at this time.
126 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
127 AU.setPreservesAll();
129 AU.addRequired<DominatorSet>();
132 /// abortIfBroken - If the module is broken and we are supposed to abort on
133 /// this condition, do so.
135 void abortIfBroken() {
138 msgs << "Broken module found, ";
141 case AbortProcessAction:
142 msgs << "compilation aborted!\n";
143 std::cerr << msgs.str();
145 case ThrowExceptionAction:
146 msgs << "verification terminated.\n";
148 case PrintMessageAction:
149 msgs << "verification continues.\n";
150 std::cerr << msgs.str();
152 case ReturnStatusAction:
159 // Verification methods...
160 void verifySymbolTable(SymbolTable &ST);
161 void visitGlobalValue(GlobalValue &GV);
162 void visitFunction(Function &F);
163 void visitBasicBlock(BasicBlock &BB);
164 void visitPHINode(PHINode &PN);
165 void visitBinaryOperator(BinaryOperator &B);
166 void visitShiftInst(ShiftInst &SI);
167 void visitVANextInst(VANextInst &VAN) { visitInstruction(VAN); }
168 void visitVAArgInst(VAArgInst &VAA) { visitInstruction(VAA); }
169 void visitCallInst(CallInst &CI);
170 void visitGetElementPtrInst(GetElementPtrInst &GEP);
171 void visitLoadInst(LoadInst &LI);
172 void visitStoreInst(StoreInst &SI);
173 void visitInstruction(Instruction &I);
174 void visitTerminatorInst(TerminatorInst &I);
175 void visitReturnInst(ReturnInst &RI);
176 void visitSelectInst(SelectInst &SI);
177 void visitUserOp1(Instruction &I);
178 void visitUserOp2(Instruction &I) { visitUserOp1(I); }
179 void visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI);
182 void WriteValue(const Value *V) {
184 if (isa<Instruction>(V)) {
186 } else if (const Type *Ty = dyn_cast<Type>(V)) {
187 WriteTypeSymbolic(msgs, Ty, Mod);
189 WriteAsOperand (msgs, V, true, true, Mod);
195 // CheckFailed - A check failed, so print out the condition and the message
196 // that failed. This provides a nice place to put a breakpoint if you want
197 // to see why something is not correct.
198 void CheckFailed(const std::string &Message,
199 const Value *V1 = 0, const Value *V2 = 0,
200 const Value *V3 = 0, const Value *V4 = 0) {
201 msgs << Message << "\n";
210 RegisterOpt<Verifier> X("verify", "Module Verifier");
211 } // End anonymous namespace
214 // Assert - We know that cond should be true, if not print an error message.
215 #define Assert(C, M) \
216 do { if (!(C)) { CheckFailed(M); return; } } while (0)
217 #define Assert1(C, M, V1) \
218 do { if (!(C)) { CheckFailed(M, V1); return; } } while (0)
219 #define Assert2(C, M, V1, V2) \
220 do { if (!(C)) { CheckFailed(M, V1, V2); return; } } while (0)
221 #define Assert3(C, M, V1, V2, V3) \
222 do { if (!(C)) { CheckFailed(M, V1, V2, V3); return; } } while (0)
223 #define Assert4(C, M, V1, V2, V3, V4) \
224 do { if (!(C)) { CheckFailed(M, V1, V2, V3, V4); return; } } while (0)
227 void Verifier::visitGlobalValue(GlobalValue &GV) {
228 Assert1(!GV.isExternal() || GV.hasExternalLinkage(),
229 "Global is external, but doesn't have external linkage!", &GV);
230 Assert1(!GV.hasAppendingLinkage() || isa<GlobalVariable>(GV),
231 "Only global variables can have appending linkage!", &GV);
233 if (GV.hasAppendingLinkage()) {
234 GlobalVariable &GVar = cast<GlobalVariable>(GV);
235 Assert1(isa<ArrayType>(GVar.getType()->getElementType()),
236 "Only global arrays can have appending linkage!", &GV);
240 // verifySymbolTable - Verify that a function or module symbol table is ok
242 void Verifier::verifySymbolTable(SymbolTable &ST) {
243 // Loop over all of the types in the symbol table...
244 for (SymbolTable::iterator TI = ST.begin(), TE = ST.end(); TI != TE; ++TI)
245 for (SymbolTable::type_iterator I = TI->second.begin(),
246 E = TI->second.end(); I != E; ++I) {
247 Value *V = I->second;
249 // Check that there are no void typed values in the symbol table. Values
250 // with a void type cannot be put into symbol tables because they cannot
252 Assert1(V->getType() != Type::VoidTy,
253 "Values with void type are not allowed to have names!", V);
258 // visitFunction - Verify that a function is ok.
260 void Verifier::visitFunction(Function &F) {
261 // Check function arguments...
262 const FunctionType *FT = F.getFunctionType();
263 unsigned NumArgs = F.getArgumentList().size();
265 Assert2(FT->getNumParams() == NumArgs,
266 "# formal arguments must match # of arguments for function type!",
268 Assert1(F.getReturnType()->isFirstClassType() ||
269 F.getReturnType() == Type::VoidTy,
270 "Functions cannot return aggregate values!", &F);
272 // Check that the argument values match the function type for this function...
274 for (Function::aiterator I = F.abegin(), E = F.aend(); I != E; ++I, ++i)
275 Assert2(I->getType() == FT->getParamType(i),
276 "Argument value does not match function argument type!",
277 I, FT->getParamType(i));
279 if (!F.isExternal()) {
280 verifySymbolTable(F.getSymbolTable());
282 // Check the entry node
283 BasicBlock *Entry = &F.getEntryBlock();
284 Assert1(pred_begin(Entry) == pred_end(Entry),
285 "Entry block to function must not have predecessors!", Entry);
290 // verifyBasicBlock - Verify that a basic block is well formed...
292 void Verifier::visitBasicBlock(BasicBlock &BB) {
293 // Check constraints that this basic block imposes on all of the PHI nodes in
295 if (isa<PHINode>(BB.front())) {
296 std::vector<BasicBlock*> Preds(pred_begin(&BB), pred_end(&BB));
297 std::sort(Preds.begin(), Preds.end());
299 for (BasicBlock::iterator I = BB.begin();
300 PHINode *PN = dyn_cast<PHINode>(I); ++I) {
302 // Ensure that PHI nodes have at least one entry!
303 Assert1(PN->getNumIncomingValues() != 0,
304 "PHI nodes must have at least one entry. If the block is dead, "
305 "the PHI should be removed!", PN);
306 Assert1(PN->getNumIncomingValues() == Preds.size(),
307 "PHINode should have one entry for each predecessor of its "
308 "parent basic block!", PN);
310 // Get and sort all incoming values in the PHI node...
311 std::vector<std::pair<BasicBlock*, Value*> > Values;
312 Values.reserve(PN->getNumIncomingValues());
313 for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i)
314 Values.push_back(std::make_pair(PN->getIncomingBlock(i),
315 PN->getIncomingValue(i)));
316 std::sort(Values.begin(), Values.end());
318 for (unsigned i = 0, e = Values.size(); i != e; ++i) {
319 // Check to make sure that if there is more than one entry for a
320 // particular basic block in this PHI node, that the incoming values are
323 Assert4(i == 0 || Values[i].first != Values[i-1].first ||
324 Values[i].second == Values[i-1].second,
325 "PHI node has multiple entries for the same basic block with "
326 "different incoming values!", PN, Values[i].first,
327 Values[i].second, Values[i-1].second);
329 // Check to make sure that the predecessors and PHI node entries are
331 Assert3(Values[i].first == Preds[i],
332 "PHI node entries do not match predecessors!", PN,
333 Values[i].first, Preds[i]);
338 // Ensure that basic blocks have terminators!
339 Assert1(BB.getTerminator(), "Basic Block does not have terminator!", &BB);
342 void Verifier::visitTerminatorInst(TerminatorInst &I) {
343 // Ensure that terminators only exist at the end of the basic block.
344 Assert1(&I == I.getParent()->getTerminator(),
345 "Terminator found in the middle of a basic block!", I.getParent());
349 void Verifier::visitReturnInst(ReturnInst &RI) {
350 Function *F = RI.getParent()->getParent();
351 if (RI.getNumOperands() == 0)
352 Assert1(F->getReturnType() == Type::VoidTy,
353 "Function returns no value, but ret instruction found that does!",
356 Assert2(F->getReturnType() == RI.getOperand(0)->getType(),
357 "Function return type does not match operand "
358 "type of return inst!", &RI, F->getReturnType());
360 // Check to make sure that the return value has necessary properties for
362 visitTerminatorInst(RI);
365 void Verifier::visitSelectInst(SelectInst &SI) {
366 Assert1(SI.getCondition()->getType() == Type::BoolTy,
367 "Select condition type must be bool!", &SI);
368 Assert1(SI.getTrueValue()->getType() == SI.getFalseValue()->getType(),
369 "Select values must have identical types!", &SI);
370 Assert1(SI.getTrueValue()->getType() == SI.getType(),
371 "Select values must have same type as select instruction!", &SI);
375 /// visitUserOp1 - User defined operators shouldn't live beyond the lifetime of
376 /// a pass, if any exist, it's an error.
378 void Verifier::visitUserOp1(Instruction &I) {
379 Assert1(0, "User-defined operators should not live outside of a pass!",
383 /// visitPHINode - Ensure that a PHI node is well formed.
385 void Verifier::visitPHINode(PHINode &PN) {
386 // Ensure that the PHI nodes are all grouped together at the top of the block.
387 // This can be tested by checking whether the instruction before this is
388 // either nonexistent (because this is begin()) or is a PHI node. If not,
389 // then there is some other instruction before a PHI.
390 Assert2(&PN.getParent()->front() == &PN || isa<PHINode>(PN.getPrev()),
391 "PHI nodes not grouped at top of basic block!",
392 &PN, PN.getParent());
394 // Check that all of the operands of the PHI node have the same type as the
396 for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i)
397 Assert1(PN.getType() == PN.getIncomingValue(i)->getType(),
398 "PHI node operands are not the same type as the result!", &PN);
400 // All other PHI node constraints are checked in the visitBasicBlock method.
402 visitInstruction(PN);
405 void Verifier::visitCallInst(CallInst &CI) {
406 Assert1(isa<PointerType>(CI.getOperand(0)->getType()),
407 "Called function must be a pointer!", &CI);
408 const PointerType *FPTy = cast<PointerType>(CI.getOperand(0)->getType());
409 Assert1(isa<FunctionType>(FPTy->getElementType()),
410 "Called function is not pointer to function type!", &CI);
412 const FunctionType *FTy = cast<FunctionType>(FPTy->getElementType());
414 // Verify that the correct number of arguments are being passed
416 Assert1(CI.getNumOperands()-1 >= FTy->getNumParams(),
417 "Called function requires more parameters than were provided!",&CI);
419 Assert1(CI.getNumOperands()-1 == FTy->getNumParams(),
420 "Incorrect number of arguments passed to called function!", &CI);
422 // Verify that all arguments to the call match the function type...
423 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
424 Assert3(CI.getOperand(i+1)->getType() == FTy->getParamType(i),
425 "Call parameter type does not match function signature!",
426 CI.getOperand(i+1), FTy->getParamType(i), &CI);
428 if (Function *F = CI.getCalledFunction())
429 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
430 visitIntrinsicFunctionCall(ID, CI);
432 visitInstruction(CI);
435 /// visitBinaryOperator - Check that both arguments to the binary operator are
436 /// of the same type!
438 void Verifier::visitBinaryOperator(BinaryOperator &B) {
439 Assert1(B.getOperand(0)->getType() == B.getOperand(1)->getType(),
440 "Both operands to a binary operator are not of the same type!", &B);
442 // Check that logical operators are only used with integral operands.
443 if (B.getOpcode() == Instruction::And || B.getOpcode() == Instruction::Or ||
444 B.getOpcode() == Instruction::Xor) {
445 Assert1(B.getType()->isIntegral(),
446 "Logical operators only work with integral types!", &B);
447 Assert1(B.getType() == B.getOperand(0)->getType(),
448 "Logical operators must have same type for operands and result!",
450 } else if (isa<SetCondInst>(B)) {
451 // Check that setcc instructions return bool
452 Assert1(B.getType() == Type::BoolTy,
453 "setcc instructions must return boolean values!", &B);
455 // Arithmetic operators only work on integer or fp values
456 Assert1(B.getType() == B.getOperand(0)->getType(),
457 "Arithmetic operators must have same type for operands and result!",
459 Assert1(B.getType()->isInteger() || B.getType()->isFloatingPoint(),
460 "Arithmetic operators must have integer or fp type!", &B);
466 void Verifier::visitShiftInst(ShiftInst &SI) {
467 Assert1(SI.getType()->isInteger(),
468 "Shift must return an integer result!", &SI);
469 Assert1(SI.getType() == SI.getOperand(0)->getType(),
470 "Shift return type must be same as first operand!", &SI);
471 Assert1(SI.getOperand(1)->getType() == Type::UByteTy,
472 "Second operand to shift must be ubyte type!", &SI);
473 visitInstruction(SI);
476 void Verifier::visitGetElementPtrInst(GetElementPtrInst &GEP) {
478 GetElementPtrInst::getIndexedType(GEP.getOperand(0)->getType(),
479 std::vector<Value*>(GEP.idx_begin(), GEP.idx_end()), true);
480 Assert1(ElTy, "Invalid indices for GEP pointer type!", &GEP);
481 Assert2(PointerType::get(ElTy) == GEP.getType(),
482 "GEP is not of right type for indices!", &GEP, ElTy);
483 visitInstruction(GEP);
486 void Verifier::visitLoadInst(LoadInst &LI) {
488 cast<PointerType>(LI.getOperand(0)->getType())->getElementType();
489 Assert2(ElTy == LI.getType(),
490 "Load result type does not match pointer operand type!", &LI, ElTy);
491 visitInstruction(LI);
494 void Verifier::visitStoreInst(StoreInst &SI) {
496 cast<PointerType>(SI.getOperand(1)->getType())->getElementType();
497 Assert2(ElTy == SI.getOperand(0)->getType(),
498 "Stored value type does not match pointer operand type!", &SI, ElTy);
499 visitInstruction(SI);
503 /// verifyInstruction - Verify that an instruction is well formed.
505 void Verifier::visitInstruction(Instruction &I) {
506 BasicBlock *BB = I.getParent();
507 Assert1(BB, "Instruction not embedded in basic block!", &I);
509 if (!isa<PHINode>(I)) { // Check that non-phi nodes are not self referential
510 for (Value::use_iterator UI = I.use_begin(), UE = I.use_end();
512 Assert1(*UI != (User*)&I ||
513 !DS->dominates(&BB->getParent()->getEntryBlock(), BB),
514 "Only PHI nodes may reference their own value!", &I);
517 // Check that void typed values don't have names
518 Assert1(I.getType() != Type::VoidTy || !I.hasName(),
519 "Instruction has a name, but provides a void value!", &I);
521 // Check that the return value of the instruction is either void or a legal
523 Assert1(I.getType() == Type::VoidTy || I.getType()->isFirstClassType(),
524 "Instruction returns a non-scalar type!", &I);
526 // Check that all uses of the instruction, if they are instructions
527 // themselves, actually have parent basic blocks. If the use is not an
528 // instruction, it is an error!
529 for (User::use_iterator UI = I.use_begin(), UE = I.use_end();
531 Assert1(isa<Instruction>(*UI), "Use of instruction is not an instruction!",
533 Instruction *Used = cast<Instruction>(*UI);
534 Assert2(Used->getParent() != 0, "Instruction referencing instruction not"
535 " embeded in a basic block!", &I, Used);
538 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
539 // Check to make sure that the "address of" an intrinsic function is never
541 if (Function *F = dyn_cast<Function>(I.getOperand(i))) {
542 Assert1(!F->isIntrinsic() || (i == 0 && isa<CallInst>(I)),
543 "Cannot take the address of an intrinsic!", &I);
544 } else if (BasicBlock *OpBB = dyn_cast<BasicBlock>(I.getOperand(i))) {
545 Assert1(OpBB->getParent() == BB->getParent(),
546 "Referring to a basic block in another function!", &I);
547 } else if (Argument *OpArg = dyn_cast<Argument>(I.getOperand(i))) {
548 Assert1(OpArg->getParent() == BB->getParent(),
549 "Referring to an argument in another function!", &I);
550 } else if (Instruction *Op = dyn_cast<Instruction>(I.getOperand(i))) {
551 BasicBlock *OpBlock = Op->getParent();
553 // Check that a definition dominates all of its uses.
554 if (!isa<PHINode>(I)) {
555 // Invoke results are only usable in the normal destination, not in the
556 // exceptional destination.
557 if (InvokeInst *II = dyn_cast<InvokeInst>(Op))
558 OpBlock = II->getNormalDest();
559 else if (OpBlock == BB) {
560 // If they are in the same basic block, make sure that the definition
561 // comes before the use.
562 Assert2(DS->dominates(Op, &I),
563 "Instruction does not dominate all uses!", Op, &I);
566 // Definition must dominate use unless use is unreachable!
567 Assert2(DS->dominates(OpBlock, BB) ||
568 !DS->dominates(&BB->getParent()->getEntryBlock(), BB),
569 "Instruction does not dominate all uses!", Op, &I);
571 // PHI nodes are more difficult than other nodes because they actually
572 // "use" the value in the predecessor basic blocks they correspond to.
573 BasicBlock *PredBB = cast<BasicBlock>(I.getOperand(i+1));
574 Assert2(DS->dominates(OpBlock, PredBB) ||
575 !DS->dominates(&BB->getParent()->getEntryBlock(), PredBB),
576 "Instruction does not dominate all uses!", Op, &I);
582 /// visitIntrinsicFunction - Allow intrinsics to be verified in different ways.
584 void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) {
585 Function *IF = CI.getCalledFunction();
586 const FunctionType *FT = IF->getFunctionType();
587 Assert1(IF->isExternal(), "Intrinsic functions should never be defined!", IF);
588 unsigned NumArgs = 0;
590 // FIXME: this should check the return type of each intrinsic as well, also
593 case Intrinsic::vastart:
594 Assert1(CI.getParent()->getParent()->getFunctionType()->isVarArg(),
595 "llvm.va_start intrinsic may only occur in function with variable"
599 case Intrinsic::vaend: NumArgs = 1; break;
600 case Intrinsic::vacopy: NumArgs = 1; break;
602 case Intrinsic::returnaddress:
603 case Intrinsic::frameaddress:
604 Assert1(isa<PointerType>(FT->getReturnType()),
605 "llvm.(frame|return)address must return pointers", IF);
606 Assert1(FT->getNumParams() == 1 && isa<ConstantInt>(CI.getOperand(1)),
607 "llvm.(frame|return)address require a single constant integer argument",
612 // Verify that read and write port have integral parameters of the correct
614 case Intrinsic::writeport:
615 Assert1(FT->getNumParams() == 2,
616 "Illegal # arguments for intrinsic function!", IF);
617 Assert1(FT->getParamType(0)->isIntegral(),
618 "First argument not unsigned int!", IF);
619 Assert1(FT->getParamType(1)->isUnsigned(),
620 "First argument not unsigned int!", IF);
624 case Intrinsic::writeio:
625 Assert1(FT->getNumParams() == 2,
626 "Illegal # arguments for intrinsic function!", IF);
627 Assert1(FT->getParamType(0)->isFirstClassType(),
628 "First argument not a first class type!", IF);
629 Assert1(FT->getParamType(1)->getPrimitiveID() == Type::PointerTyID,
630 "Second argument not a pointer!", IF);
634 case Intrinsic::readport:
635 Assert1(FT->getNumParams() == 1,
636 "Illegal # arguments for intrinsic function!", IF);
637 Assert1(FT->getReturnType()->isFirstClassType(),
638 "Return type is not a first class type!", IF);
639 Assert1(FT->getParamType(0)->isUnsigned(),
640 "First argument not unsigned int!", IF);
644 case Intrinsic:: readio: {
645 const Type * ParamType = FT->getParamType(0);
646 const Type * ReturnType = FT->getReturnType();
648 Assert1(FT->getNumParams() == 1,
649 "Illegal # arguments for intrinsic function!", IF);
650 Assert1(isa<PointerType>(ParamType),
651 "First argument not a pointer!", IF);
652 Assert1(((cast<PointerType>(ParamType)->getElementType()) == ReturnType),
653 "Pointer type doesn't match return type!", IF);
658 case Intrinsic::setjmp: NumArgs = 1; break;
659 case Intrinsic::longjmp: NumArgs = 2; break;
660 case Intrinsic::sigsetjmp: NumArgs = 2; break;
661 case Intrinsic::siglongjmp: NumArgs = 2; break;
663 case Intrinsic::dbg_stoppoint: NumArgs = 4; break;
664 case Intrinsic::dbg_region_start:NumArgs = 1; break;
665 case Intrinsic::dbg_region_end: NumArgs = 1; break;
666 case Intrinsic::dbg_func_start: NumArgs = 1; break;
667 case Intrinsic::dbg_declare: NumArgs = 1; break;
669 case Intrinsic::memcpy: NumArgs = 4; break;
670 case Intrinsic::memmove: NumArgs = 4; break;
671 case Intrinsic::memset: NumArgs = 4; break;
673 case Intrinsic::alpha_ctlz: NumArgs = 1; break;
674 case Intrinsic::alpha_cttz: NumArgs = 1; break;
675 case Intrinsic::alpha_ctpop: NumArgs = 1; break;
676 case Intrinsic::alpha_umulh: NumArgs = 2; break;
677 case Intrinsic::alpha_vecop: NumArgs = 4; break;
678 case Intrinsic::alpha_pup: NumArgs = 3; break;
679 case Intrinsic::alpha_bytezap: NumArgs = 2; break;
680 case Intrinsic::alpha_bytemanip: NumArgs = 3; break;
681 case Intrinsic::alpha_dfpbop: NumArgs = 3; break;
682 case Intrinsic::alpha_dfpuop: NumArgs = 2; break;
683 case Intrinsic::alpha_unordered: NumArgs = 2; break;
684 case Intrinsic::alpha_uqtodfp: NumArgs = 2; break;
685 case Intrinsic::alpha_uqtosfp: NumArgs = 2; break;
686 case Intrinsic::alpha_dfptosq: NumArgs = 2; break;
687 case Intrinsic::alpha_sfptosq: NumArgs = 2; break;
689 case Intrinsic::not_intrinsic:
690 assert(0 && "Invalid intrinsic!"); NumArgs = 0; break;
693 Assert1(FT->getNumParams() == NumArgs || (FT->getNumParams() < NumArgs &&
695 "Illegal # arguments for intrinsic function!", IF);
699 //===----------------------------------------------------------------------===//
700 // Implement the public interfaces to this file...
701 //===----------------------------------------------------------------------===//
703 FunctionPass *llvm::createVerifierPass(VerifierFailureAction action) {
704 return new Verifier(action);
708 // verifyFunction - Create
709 bool llvm::verifyFunction(const Function &f, VerifierFailureAction action) {
710 Function &F = const_cast<Function&>(f);
711 assert(!F.isExternal() && "Cannot verify external functions");
713 FunctionPassManager FPM(new ExistingModuleProvider(F.getParent()));
714 Verifier *V = new Verifier(action);
720 /// verifyModule - Check a module for errors, printing messages on stderr.
721 /// Return true if the module is corrupt.
723 bool llvm::verifyModule(const Module &M, VerifierFailureAction action) {
725 Verifier *V = new Verifier(action);