//===-- Verifier.cpp - Implement the Module Verifier -------------*- C++ -*-==// // // The LLVM Compiler Infrastructure // // This file was developed by the LLVM research group and is distributed under // the University of Illinois Open Source License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // This file defines the function verifier interface, that can be used for some // sanity checking of input to the system. // // Note that this does not provide full `Java style' security and verifications, // instead it just tries to ensure that code is well-formed. // // * Both of a binary operator's parameters are of the same type // * Verify that the indices of mem access instructions match other operands // * Verify that arithmetic and other things are only performed on first-class // types. Verify that shifts & logicals only happen on integrals f.e. // * All of the constants in a switch statement are of the correct type // * The code is in valid SSA form // * It should be illegal to put a label into any other type (like a structure) // or to return one. [except constant arrays!] // * Only phi nodes can be self referential: 'add int %0, %0 ; :0' is bad // * PHI nodes must have an entry for each predecessor, with no extras. // * PHI nodes must be the first thing in a basic block, all grouped together // * PHI nodes must have at least one entry // * All basic blocks should only end with terminator insts, not contain them // * The entry node to a function must not have predecessors // * All Instructions must be embedded into a basic block // * Functions cannot take a void-typed parameter // * Verify that a function's argument list agrees with it's declared type. // * It is illegal to specify a name for a void value. // * It is illegal to have a internal global value with no initializer // * It is illegal to have a ret instruction that returns a value that does not // agree with the function return value type. // * Function call argument types match the function prototype // * All other things that are tested by asserts spread about the code... // //===----------------------------------------------------------------------===// #include "llvm/Analysis/Verifier.h" #include "llvm/Assembly/Writer.h" #include "llvm/CallingConv.h" #include "llvm/Constants.h" #include "llvm/Pass.h" #include "llvm/Module.h" #include "llvm/ModuleProvider.h" #include "llvm/DerivedTypes.h" #include "llvm/InlineAsm.h" #include "llvm/Instructions.h" #include "llvm/Intrinsics.h" #include "llvm/PassManager.h" #include "llvm/SymbolTable.h" #include "llvm/Analysis/Dominators.h" #include "llvm/Support/CFG.h" #include "llvm/Support/InstVisitor.h" #include "llvm/ADT/STLExtras.h" #include #include #include using namespace llvm; namespace { // Anonymous namespace for class struct Verifier : public FunctionPass, InstVisitor { bool Broken; // Is this module found to be broken? bool RealPass; // Are we not being run by a PassManager? VerifierFailureAction action; // What to do if verification fails. Module *Mod; // Module we are verifying right now ETForest *EF; // ET-Forest, caution can be null! std::stringstream msgs; // A stringstream to collect messages /// InstInThisBlock - when verifying a basic block, keep track of all of the /// instructions we have seen so far. This allows us to do efficient /// dominance checks for the case when an instruction has an operand that is /// an instruction in the same block. std::set InstsInThisBlock; Verifier() : Broken(false), RealPass(true), action(AbortProcessAction), EF(0), msgs( std::ios::app | std::ios::out ) {} Verifier( VerifierFailureAction ctn ) : Broken(false), RealPass(true), action(ctn), EF(0), msgs( std::ios::app | std::ios::out ) {} Verifier(bool AB ) : Broken(false), RealPass(true), action( AB ? AbortProcessAction : PrintMessageAction), EF(0), msgs( std::ios::app | std::ios::out ) {} Verifier(ETForest &ef) : Broken(false), RealPass(false), action(PrintMessageAction), EF(&ef), msgs( std::ios::app | std::ios::out ) {} bool doInitialization(Module &M) { Mod = &M; verifySymbolTable(M.getSymbolTable()); // If this is a real pass, in a pass manager, we must abort before // returning back to the pass manager, or else the pass manager may try to // run other passes on the broken module. if (RealPass) abortIfBroken(); return false; } bool runOnFunction(Function &F) { // Get dominator information if we are being run by PassManager if (RealPass) EF = &getAnalysis(); visit(F); InstsInThisBlock.clear(); // If this is a real pass, in a pass manager, we must abort before // returning back to the pass manager, or else the pass manager may try to // run other passes on the broken module. if (RealPass) abortIfBroken(); return false; } bool doFinalization(Module &M) { // Scan through, checking all of the external function's linkage now... for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) { visitGlobalValue(*I); // Check to make sure function prototypes are okay. if (I->isExternal()) visitFunction(*I); } for (Module::global_iterator I = M.global_begin(), E = M.global_end(); I != E; ++I) visitGlobalVariable(*I); // If the module is broken, abort at this time. abortIfBroken(); return false; } virtual void getAnalysisUsage(AnalysisUsage &AU) const { AU.setPreservesAll(); if (RealPass) AU.addRequired(); } /// abortIfBroken - If the module is broken and we are supposed to abort on /// this condition, do so. /// void abortIfBroken() { if (Broken) { msgs << "Broken module found, "; switch (action) { case AbortProcessAction: msgs << "compilation aborted!\n"; std::cerr << msgs.str(); abort(); case ThrowExceptionAction: msgs << "verification terminated.\n"; throw msgs.str(); case PrintMessageAction: msgs << "verification continues.\n"; std::cerr << msgs.str(); break; case ReturnStatusAction: break; } } } // Verification methods... void verifySymbolTable(SymbolTable &ST); void visitGlobalValue(GlobalValue &GV); void visitGlobalVariable(GlobalVariable &GV); void visitFunction(Function &F); void visitBasicBlock(BasicBlock &BB); void visitPHINode(PHINode &PN); void visitBinaryOperator(BinaryOperator &B); void visitShiftInst(ShiftInst &SI); void visitExtractElementInst(ExtractElementInst &EI); void visitInsertElementInst(InsertElementInst &EI); void visitVAArgInst(VAArgInst &VAA) { visitInstruction(VAA); } void visitCallInst(CallInst &CI); void visitGetElementPtrInst(GetElementPtrInst &GEP); void visitLoadInst(LoadInst &LI); void visitStoreInst(StoreInst &SI); void visitInstruction(Instruction &I); void visitTerminatorInst(TerminatorInst &I); void visitReturnInst(ReturnInst &RI); void visitSwitchInst(SwitchInst &SI); void visitSelectInst(SelectInst &SI); void visitUserOp1(Instruction &I); void visitUserOp2(Instruction &I) { visitUserOp1(I); } void visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI); void WriteValue(const Value *V) { if (!V) return; if (isa(V)) { msgs << *V; } else { WriteAsOperand (msgs, V, true, true, Mod); msgs << "\n"; } } void WriteType(const Type* T ) { if ( !T ) return; WriteTypeSymbolic(msgs, T, Mod ); } // CheckFailed - A check failed, so print out the condition and the message // that failed. This provides a nice place to put a breakpoint if you want // to see why something is not correct. void CheckFailed(const std::string &Message, const Value *V1 = 0, const Value *V2 = 0, const Value *V3 = 0, const Value *V4 = 0) { msgs << Message << "\n"; WriteValue(V1); WriteValue(V2); WriteValue(V3); WriteValue(V4); Broken = true; } void CheckFailed( const std::string& Message, const Value* V1, const Type* T2, const Value* V3 = 0 ) { msgs << Message << "\n"; WriteValue(V1); WriteType(T2); WriteValue(V3); Broken = true; } }; RegisterOpt X("verify", "Module Verifier"); } // End anonymous namespace // Assert - We know that cond should be true, if not print an error message. #define Assert(C, M) \ do { if (!(C)) { CheckFailed(M); return; } } while (0) #define Assert1(C, M, V1) \ do { if (!(C)) { CheckFailed(M, V1); return; } } while (0) #define Assert2(C, M, V1, V2) \ do { if (!(C)) { CheckFailed(M, V1, V2); return; } } while (0) #define Assert3(C, M, V1, V2, V3) \ do { if (!(C)) { CheckFailed(M, V1, V2, V3); return; } } while (0) #define Assert4(C, M, V1, V2, V3, V4) \ do { if (!(C)) { CheckFailed(M, V1, V2, V3, V4); return; } } while (0) void Verifier::visitGlobalValue(GlobalValue &GV) { Assert1(!GV.isExternal() || GV.hasExternalLinkage(), "Global is external, but doesn't have external linkage!", &GV); Assert1(!GV.hasAppendingLinkage() || isa(GV), "Only global variables can have appending linkage!", &GV); if (GV.hasAppendingLinkage()) { GlobalVariable &GVar = cast(GV); Assert1(isa(GVar.getType()->getElementType()), "Only global arrays can have appending linkage!", &GV); } } void Verifier::visitGlobalVariable(GlobalVariable &GV) { if (GV.hasInitializer()) Assert1(GV.getInitializer()->getType() == GV.getType()->getElementType(), "Global variable initializer type does not match global " "variable type!", &GV); visitGlobalValue(GV); } // verifySymbolTable - Verify that a function or module symbol table is ok // void Verifier::verifySymbolTable(SymbolTable &ST) { // Loop over all of the values in all type planes in the symbol table. for (SymbolTable::plane_const_iterator PI = ST.plane_begin(), PE = ST.plane_end(); PI != PE; ++PI) for (SymbolTable::value_const_iterator VI = PI->second.begin(), VE = PI->second.end(); VI != VE; ++VI) { Value *V = VI->second; // Check that there are no void typed values in the symbol table. Values // with a void type cannot be put into symbol tables because they cannot // have names! Assert1(V->getType() != Type::VoidTy, "Values with void type are not allowed to have names!", V); } } // visitFunction - Verify that a function is ok. // void Verifier::visitFunction(Function &F) { Assert1(!F.isVarArg() || F.getCallingConv() == CallingConv::C, "Varargs functions must have C calling conventions!", &F); // Check function arguments. const FunctionType *FT = F.getFunctionType(); unsigned NumArgs = F.getArgumentList().size(); Assert2(FT->getNumParams() == NumArgs, "# formal arguments must match # of arguments for function type!", &F, FT); Assert1(F.getReturnType()->isFirstClassType() || F.getReturnType() == Type::VoidTy, "Functions cannot return aggregate values!", &F); // Check that the argument values match the function type for this function... unsigned i = 0; for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E; ++I, ++i) { Assert2(I->getType() == FT->getParamType(i), "Argument value does not match function argument type!", I, FT->getParamType(i)); // Make sure no aggregates are passed by value. Assert1(I->getType()->isFirstClassType(), "Functions cannot take aggregates as arguments by value!", I); } if (!F.isExternal()) { verifySymbolTable(F.getSymbolTable()); // Check the entry node BasicBlock *Entry = &F.getEntryBlock(); Assert1(pred_begin(Entry) == pred_end(Entry), "Entry block to function must not have predecessors!", Entry); } } // verifyBasicBlock - Verify that a basic block is well formed... // void Verifier::visitBasicBlock(BasicBlock &BB) { InstsInThisBlock.clear(); // Ensure that basic blocks have terminators! Assert1(BB.getTerminator(), "Basic Block does not have terminator!", &BB); // Check constraints that this basic block imposes on all of the PHI nodes in // it. if (isa(BB.front())) { std::vector Preds(pred_begin(&BB), pred_end(&BB)); std::sort(Preds.begin(), Preds.end()); PHINode *PN; for (BasicBlock::iterator I = BB.begin(); (PN = dyn_cast(I));++I) { // Ensure that PHI nodes have at least one entry! Assert1(PN->getNumIncomingValues() != 0, "PHI nodes must have at least one entry. If the block is dead, " "the PHI should be removed!", PN); Assert1(PN->getNumIncomingValues() == Preds.size(), "PHINode should have one entry for each predecessor of its " "parent basic block!", PN); // Get and sort all incoming values in the PHI node... std::vector > Values; Values.reserve(PN->getNumIncomingValues()); for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i) Values.push_back(std::make_pair(PN->getIncomingBlock(i), PN->getIncomingValue(i))); std::sort(Values.begin(), Values.end()); for (unsigned i = 0, e = Values.size(); i != e; ++i) { // Check to make sure that if there is more than one entry for a // particular basic block in this PHI node, that the incoming values are // all identical. // Assert4(i == 0 || Values[i].first != Values[i-1].first || Values[i].second == Values[i-1].second, "PHI node has multiple entries for the same basic block with " "different incoming values!", PN, Values[i].first, Values[i].second, Values[i-1].second); // Check to make sure that the predecessors and PHI node entries are // matched up. Assert3(Values[i].first == Preds[i], "PHI node entries do not match predecessors!", PN, Values[i].first, Preds[i]); } } } } void Verifier::visitTerminatorInst(TerminatorInst &I) { // Ensure that terminators only exist at the end of the basic block. Assert1(&I == I.getParent()->getTerminator(), "Terminator found in the middle of a basic block!", I.getParent()); visitInstruction(I); } void Verifier::visitReturnInst(ReturnInst &RI) { Function *F = RI.getParent()->getParent(); if (RI.getNumOperands() == 0) Assert2(F->getReturnType() == Type::VoidTy, "Found return instr that returns void in Function of non-void " "return type!", &RI, F->getReturnType()); else Assert2(F->getReturnType() == RI.getOperand(0)->getType(), "Function return type does not match operand " "type of return inst!", &RI, F->getReturnType()); // Check to make sure that the return value has necessary properties for // terminators... visitTerminatorInst(RI); } void Verifier::visitSwitchInst(SwitchInst &SI) { // Check to make sure that all of the constants in the switch instruction // have the same type as the switched-on value. const Type *SwitchTy = SI.getCondition()->getType(); for (unsigned i = 1, e = SI.getNumCases(); i != e; ++i) Assert1(SI.getCaseValue(i)->getType() == SwitchTy, "Switch constants must all be same type as switch value!", &SI); visitTerminatorInst(SI); } void Verifier::visitSelectInst(SelectInst &SI) { Assert1(SI.getCondition()->getType() == Type::BoolTy, "Select condition type must be bool!", &SI); Assert1(SI.getTrueValue()->getType() == SI.getFalseValue()->getType(), "Select values must have identical types!", &SI); Assert1(SI.getTrueValue()->getType() == SI.getType(), "Select values must have same type as select instruction!", &SI); visitInstruction(SI); } /// visitUserOp1 - User defined operators shouldn't live beyond the lifetime of /// a pass, if any exist, it's an error. /// void Verifier::visitUserOp1(Instruction &I) { Assert1(0, "User-defined operators should not live outside of a pass!", &I); } /// visitPHINode - Ensure that a PHI node is well formed. /// void Verifier::visitPHINode(PHINode &PN) { // Ensure that the PHI nodes are all grouped together at the top of the block. // This can be tested by checking whether the instruction before this is // either nonexistent (because this is begin()) or is a PHI node. If not, // then there is some other instruction before a PHI. Assert2(&PN.getParent()->front() == &PN || isa(PN.getPrev()), "PHI nodes not grouped at top of basic block!", &PN, PN.getParent()); // Check that all of the operands of the PHI node have the same type as the // result. for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i) Assert1(PN.getType() == PN.getIncomingValue(i)->getType(), "PHI node operands are not the same type as the result!", &PN); // All other PHI node constraints are checked in the visitBasicBlock method. visitInstruction(PN); } void Verifier::visitCallInst(CallInst &CI) { Assert1(isa(CI.getOperand(0)->getType()), "Called function must be a pointer!", &CI); const PointerType *FPTy = cast(CI.getOperand(0)->getType()); Assert1(isa(FPTy->getElementType()), "Called function is not pointer to function type!", &CI); const FunctionType *FTy = cast(FPTy->getElementType()); // Verify that the correct number of arguments are being passed if (FTy->isVarArg()) Assert1(CI.getNumOperands()-1 >= FTy->getNumParams(), "Called function requires more parameters than were provided!",&CI); else Assert1(CI.getNumOperands()-1 == FTy->getNumParams(), "Incorrect number of arguments passed to called function!", &CI); // Verify that all arguments to the call match the function type... for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i) Assert3(CI.getOperand(i+1)->getType() == FTy->getParamType(i), "Call parameter type does not match function signature!", CI.getOperand(i+1), FTy->getParamType(i), &CI); if (Function *F = CI.getCalledFunction()) if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID()) visitIntrinsicFunctionCall(ID, CI); visitInstruction(CI); } /// visitBinaryOperator - Check that both arguments to the binary operator are /// of the same type! /// void Verifier::visitBinaryOperator(BinaryOperator &B) { Assert1(B.getOperand(0)->getType() == B.getOperand(1)->getType(), "Both operands to a binary operator are not of the same type!", &B); // Check that logical operators are only used with integral operands. if (B.getOpcode() == Instruction::And || B.getOpcode() == Instruction::Or || B.getOpcode() == Instruction::Xor) { Assert1(B.getType()->isIntegral() || (isa(B.getType()) && cast(B.getType())->getElementType()->isIntegral()), "Logical operators only work with integral types!", &B); Assert1(B.getType() == B.getOperand(0)->getType(), "Logical operators must have same type for operands and result!", &B); } else if (isa(B)) { // Check that setcc instructions return bool Assert1(B.getType() == Type::BoolTy, "setcc instructions must return boolean values!", &B); } else { // Arithmetic operators only work on integer or fp values Assert1(B.getType() == B.getOperand(0)->getType(), "Arithmetic operators must have same type for operands and result!", &B); Assert1(B.getType()->isInteger() || B.getType()->isFloatingPoint() || isa(B.getType()), "Arithmetic operators must have integer, fp, or packed type!", &B); } visitInstruction(B); } void Verifier::visitShiftInst(ShiftInst &SI) { Assert1(SI.getType()->isInteger(), "Shift must return an integer result!", &SI); Assert1(SI.getType() == SI.getOperand(0)->getType(), "Shift return type must be same as first operand!", &SI); Assert1(SI.getOperand(1)->getType() == Type::UByteTy, "Second operand to shift must be ubyte type!", &SI); visitInstruction(SI); } void Verifier::visitExtractElementInst(ExtractElementInst &EI) { Assert1(isa(EI.getOperand(0)->getType()), "First operand to extractelement must be packed type!", &EI); Assert1(EI.getOperand(1)->getType() == Type::UIntTy, "Second operand to extractelement must be uint type!", &EI); Assert1(EI.getType() == cast(EI.getOperand(0)->getType())->getElementType(), "Extractelement return type must match " "first operand element type!", &EI); visitInstruction(EI); } void Verifier::visitInsertElementInst(InsertElementInst &IE) { Assert1(isa(IE.getOperand(0)->getType()), "First operand to insertelement must be packed type!", &IE); Assert1(IE.getOperand(1)->getType() == cast(IE.getOperand(0)->getType())->getElementType(), "Second operand to insertelement must match " "first operand element type!", &IE); Assert1(IE.getOperand(2)->getType() == Type::UIntTy, "Third operand to insertelement must be uint type!", &IE); visitInstruction(IE); } void Verifier::visitGetElementPtrInst(GetElementPtrInst &GEP) { const Type *ElTy = GetElementPtrInst::getIndexedType(GEP.getOperand(0)->getType(), std::vector(GEP.idx_begin(), GEP.idx_end()), true); Assert1(ElTy, "Invalid indices for GEP pointer type!", &GEP); Assert2(PointerType::get(ElTy) == GEP.getType(), "GEP is not of right type for indices!", &GEP, ElTy); visitInstruction(GEP); } void Verifier::visitLoadInst(LoadInst &LI) { const Type *ElTy = cast(LI.getOperand(0)->getType())->getElementType(); Assert2(ElTy == LI.getType(), "Load result type does not match pointer operand type!", &LI, ElTy); visitInstruction(LI); } void Verifier::visitStoreInst(StoreInst &SI) { const Type *ElTy = cast(SI.getOperand(1)->getType())->getElementType(); Assert2(ElTy == SI.getOperand(0)->getType(), "Stored value type does not match pointer operand type!", &SI, ElTy); visitInstruction(SI); } /// verifyInstruction - Verify that an instruction is well formed. /// void Verifier::visitInstruction(Instruction &I) { BasicBlock *BB = I.getParent(); Assert1(BB, "Instruction not embedded in basic block!", &I); if (!isa(I)) { // Check that non-phi nodes are not self referential for (Value::use_iterator UI = I.use_begin(), UE = I.use_end(); UI != UE; ++UI) Assert1(*UI != (User*)&I || !EF->dominates(&BB->getParent()->getEntryBlock(), BB), "Only PHI nodes may reference their own value!", &I); } // Check that void typed values don't have names Assert1(I.getType() != Type::VoidTy || !I.hasName(), "Instruction has a name, but provides a void value!", &I); // Check that the return value of the instruction is either void or a legal // value type. Assert1(I.getType() == Type::VoidTy || I.getType()->isFirstClassType(), "Instruction returns a non-scalar type!", &I); // Check that all uses of the instruction, if they are instructions // themselves, actually have parent basic blocks. If the use is not an // instruction, it is an error! for (User::use_iterator UI = I.use_begin(), UE = I.use_end(); UI != UE; ++UI) { Assert1(isa(*UI), "Use of instruction is not an instruction!", *UI); Instruction *Used = cast(*UI); Assert2(Used->getParent() != 0, "Instruction referencing instruction not" " embeded in a basic block!", &I, Used); } for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) { // Check to make sure that the "address of" an intrinsic function is never // taken. Assert1(I.getOperand(i) != 0, "Instruction has null operand!", &I); if (Function *F = dyn_cast(I.getOperand(i))) { Assert1(!F->isIntrinsic() || (i == 0 && isa(I)), "Cannot take the address of an intrinsic!", &I); } else if (BasicBlock *OpBB = dyn_cast(I.getOperand(i))) { Assert1(OpBB->getParent() == BB->getParent(), "Referring to a basic block in another function!", &I); } else if (Argument *OpArg = dyn_cast(I.getOperand(i))) { Assert1(OpArg->getParent() == BB->getParent(), "Referring to an argument in another function!", &I); } else if (Instruction *Op = dyn_cast(I.getOperand(i))) { BasicBlock *OpBlock = Op->getParent(); // Check that a definition dominates all of its uses. if (!isa(I)) { // Invoke results are only usable in the normal destination, not in the // exceptional destination. if (InvokeInst *II = dyn_cast(Op)) OpBlock = II->getNormalDest(); else if (OpBlock == BB) { // If they are in the same basic block, make sure that the definition // comes before the use. Assert2(InstsInThisBlock.count(Op) || !EF->dominates(&BB->getParent()->getEntryBlock(), BB), "Instruction does not dominate all uses!", Op, &I); } // Definition must dominate use unless use is unreachable! Assert2(EF->dominates(OpBlock, BB) || !EF->dominates(&BB->getParent()->getEntryBlock(), BB), "Instruction does not dominate all uses!", Op, &I); } else { // PHI nodes are more difficult than other nodes because they actually // "use" the value in the predecessor basic blocks they correspond to. BasicBlock *PredBB = cast(I.getOperand(i+1)); Assert2(EF->dominates(OpBlock, PredBB) || !EF->dominates(&BB->getParent()->getEntryBlock(), PredBB), "Instruction does not dominate all uses!", Op, &I); } } else if (isa(I.getOperand(i))) { Assert1(i == 0 && isa(I), "Cannot take the address of an inline asm!", &I); } } InstsInThisBlock.insert(&I); } /// visitIntrinsicFunction - Allow intrinsics to be verified in different ways. /// void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) { Function *IF = CI.getCalledFunction(); const FunctionType *FT = IF->getFunctionType(); Assert1(IF->isExternal(), "Intrinsic functions should never be defined!", IF); unsigned NumArgs = 0; // FIXME: this should check the return type of each intrinsic as well, also // arguments! switch (ID) { case Intrinsic::vastart: Assert1(CI.getParent()->getParent()->getFunctionType()->isVarArg(), "llvm.va_start intrinsic may only occur in function with variable" " args!", &CI); NumArgs = 1; break; case Intrinsic::vaend: NumArgs = 1; break; case Intrinsic::vacopy: NumArgs = 2; break; case Intrinsic::returnaddress: case Intrinsic::frameaddress: Assert1(isa(FT->getReturnType()), "llvm.(frame|return)address must return pointers", IF); Assert1(FT->getNumParams() == 1 && isa(CI.getOperand(1)), "llvm.(frame|return)address require a single constant integer argument", &CI); NumArgs = 1; break; // Verify that read and write port have integral parameters of the correct // signed-ness. case Intrinsic::writeport: Assert1(FT->getNumParams() == 2, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getParamType(0)->isIntegral(), "First argument not unsigned int!", IF); Assert1(FT->getParamType(1)->isUnsigned(), "First argument not unsigned int!", IF); NumArgs = 2; break; case Intrinsic::writeio: Assert1(FT->getNumParams() == 2, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getParamType(0)->isFirstClassType(), "First argument not a first class type!", IF); Assert1(isa(FT->getParamType(1)), "Second argument not a pointer!", IF); NumArgs = 2; break; case Intrinsic::readport: Assert1(FT->getNumParams() == 1, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getReturnType()->isFirstClassType(), "Return type is not a first class type!", IF); Assert1(FT->getParamType(0)->isUnsigned(), "First argument not unsigned int!", IF); NumArgs = 1; break; case Intrinsic::readio: { const PointerType *ParamType = dyn_cast(FT->getParamType(0)); const Type *ReturnType = FT->getReturnType(); Assert1(FT->getNumParams() == 1, "Illegal # arguments for intrinsic function!", IF); Assert1(ParamType, "First argument not a pointer!", IF); Assert1(ParamType->getElementType() == ReturnType, "Pointer type doesn't match return type!", IF); NumArgs = 1; break; } case Intrinsic::isunordered_f32: Assert1(FT->getNumParams() == 2, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getReturnType() == Type::BoolTy, "Return type is not bool!", IF); Assert1(FT->getParamType(0) == FT->getParamType(1), "Arguments must be of the same type!", IF); Assert1(FT->getParamType(0) == Type::FloatTy, "Arguments must be a 32-bit floating point type!", IF); NumArgs = 2; break; case Intrinsic::isunordered_f64: Assert1(FT->getNumParams() == 2, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getReturnType() == Type::BoolTy, "Return type is not bool!", IF); Assert1(FT->getParamType(0) == FT->getParamType(1), "Arguments must be of the same type!", IF); Assert1(FT->getParamType(0) == Type::DoubleTy, "Argument is not a 64-bit floating point type!", IF); NumArgs = 2; break; case Intrinsic::readcyclecounter: Assert1(FT->getNumParams() == 0, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getReturnType() == Type::ULongTy, "Return type is not ulong!", IF); NumArgs = 0; break; case Intrinsic::bswap_i16: Assert1(FT->getNumParams() == 1, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getReturnType() == FT->getParamType(0), "Return type does not match source type", IF); Assert1(FT->getReturnType() == Type::UShortTy, "Return type is not ushort!", IF); NumArgs = 1; break; case Intrinsic::bswap_i32: Assert1(FT->getNumParams() == 1, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getReturnType() == FT->getParamType(0), "Return type does not match source type", IF); Assert1(FT->getReturnType() == Type::UIntTy, "Return type is not uint!", IF); NumArgs = 1; break; case Intrinsic::bswap_i64: Assert1(FT->getNumParams() == 1, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getReturnType() == FT->getParamType(0), "Return type does not match source type", IF); Assert1(FT->getReturnType() == Type::ULongTy, "Return type is not ulong!", IF); NumArgs = 1; break; case Intrinsic::ctpop_i8: Assert1(FT->getNumParams() == 1, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getReturnType() == FT->getParamType(0), "Return type does not match source type", IF); Assert1(FT->getParamType(0) == Type::UByteTy, "Argument is not ubyte!", IF); NumArgs = 1; break; case Intrinsic::ctpop_i16: Assert1(FT->getNumParams() == 1, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getReturnType() == FT->getParamType(0), "Return type does not match source type", IF); Assert1(FT->getParamType(0) == Type::UShortTy, "Argument is not ushort!", IF); NumArgs = 1; break; case Intrinsic::ctpop_i32: Assert1(FT->getNumParams() == 1, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getReturnType() == FT->getParamType(0), "Return type does not match source type", IF); Assert1(FT->getParamType(0) == Type::UIntTy, "Argument is not uint!", IF); NumArgs = 1; break; case Intrinsic::ctpop_i64: Assert1(FT->getNumParams() == 1, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getReturnType() == FT->getParamType(0), "Return type does not match source type", IF); Assert1(FT->getParamType(0) == Type::ULongTy, "Argument is not ulong!", IF); NumArgs = 1; break; case Intrinsic::ctlz_i8: Assert1(FT->getNumParams() == 1, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getReturnType() == FT->getParamType(0), "Return type does not match source type", IF); Assert1(FT->getParamType(0) == Type::UByteTy, "Argument is not ubyte!", IF); NumArgs = 1; break; case Intrinsic::ctlz_i16: Assert1(FT->getNumParams() == 1, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getReturnType() == FT->getParamType(0), "Return type does not match source type", IF); Assert1(FT->getParamType(0) == Type::UShortTy, "Argument is not ushort!", IF); NumArgs = 1; break; case Intrinsic::ctlz_i32: Assert1(FT->getNumParams() == 1, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getReturnType() == FT->getParamType(0), "Return type does not match source type", IF); Assert1(FT->getParamType(0) == Type::UIntTy, "Argument is not uint!", IF); NumArgs = 1; break; case Intrinsic::ctlz_i64: Assert1(FT->getNumParams() == 1, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getReturnType() == FT->getParamType(0), "Return type does not match source type", IF); Assert1(FT->getParamType(0) == Type::ULongTy, "Argument is not ulong!", IF); NumArgs = 1; break; case Intrinsic::cttz_i8: Assert1(FT->getNumParams() == 1, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getReturnType() == FT->getParamType(0), "Return type does not match source type", IF); Assert1(FT->getParamType(0) == Type::UByteTy, "Argument is not ubyte!", IF); NumArgs = 1; break; case Intrinsic::cttz_i16: Assert1(FT->getNumParams() == 1, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getReturnType() == FT->getParamType(0), "Return type does not match source type", IF); Assert1(FT->getParamType(0) == Type::UShortTy, "Argument is not ushort!", IF); NumArgs = 1; break; case Intrinsic::cttz_i32: Assert1(FT->getNumParams() == 1, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getReturnType() == FT->getParamType(0), "Return type does not match source type", IF); Assert1(FT->getParamType(0) == Type::UIntTy, "Argument is not uint!", IF); NumArgs = 1; break; case Intrinsic::cttz_i64: Assert1(FT->getNumParams() == 1, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getReturnType() == FT->getParamType(0), "Return type does not match source type", IF); Assert1(FT->getParamType(0) == Type::ULongTy, "Argument Is not ulong!", IF); NumArgs = 1; break; case Intrinsic::sqrt_f32: Assert1(FT->getNumParams() == 1, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getParamType(0) == Type::FloatTy, "Argument is not a 32-bit floating point type!", IF); Assert1(FT->getReturnType() == FT->getParamType(0), "Return type is not the same as argument type!", IF); NumArgs = 1; break; case Intrinsic::sqrt_f64: Assert1(FT->getNumParams() == 1, "Illegal # arguments for intrinsic function!", IF); Assert1(FT->getParamType(0) == Type::DoubleTy, "Argument is not a 64-bit floating point type!", IF); Assert1(FT->getReturnType() == FT->getParamType(0), "Return type is not the same as argument type!", IF); NumArgs = 1; break; case Intrinsic::setjmp: NumArgs = 1; break; case Intrinsic::longjmp: NumArgs = 2; break; case Intrinsic::sigsetjmp: NumArgs = 2; break; case Intrinsic::siglongjmp: NumArgs = 2; break; case Intrinsic::gcroot: Assert1(FT->getNumParams() == 2, "Illegal # arguments for intrinsic function!", IF); Assert1(isa(CI.getOperand(2)), "Second argument to llvm.gcroot must be a constant!", &CI); NumArgs = 2; break; case Intrinsic::gcread: NumArgs = 2; break; case Intrinsic::gcwrite: NumArgs = 3; break; case Intrinsic::dbg_stoppoint: NumArgs = 4; break; case Intrinsic::dbg_region_start:NumArgs = 1; break; case Intrinsic::dbg_region_end: NumArgs = 1; break; case Intrinsic::dbg_func_start: NumArgs = 1; break; case Intrinsic::dbg_declare: NumArgs = 1; break; case Intrinsic::memcpy_i32: NumArgs = 4; break; case Intrinsic::memcpy_i64: NumArgs = 4; break; case Intrinsic::memmove_i32: NumArgs = 4; break; case Intrinsic::memmove_i64: NumArgs = 4; break; case Intrinsic::memset_i32: NumArgs = 4; break; case Intrinsic::memset_i64: NumArgs = 4; break; case Intrinsic::stacksave: NumArgs = 0; Assert1(CI.getType() == PointerType::get(Type::SByteTy), "llvm.stacksave must return an sbyte*", &CI); break; case Intrinsic::stackrestore: NumArgs = 1; Assert1(CI.getOperand(1)->getType() == PointerType::get(Type::SByteTy), "llvm.stackrestore must take an sbyte*", &CI); Assert1(CI.getType() == Type::VoidTy, "llvm.stackrestore return void", &CI); break; case Intrinsic::prefetch: NumArgs = 3; break; case Intrinsic::pcmarker: NumArgs = 1; Assert1(isa(CI.getOperand(1)), "First argument to llvm.pcmarker must be a constant!", &CI); break; case Intrinsic::not_intrinsic: assert(0 && "Invalid intrinsic!"); NumArgs = 0; break; } Assert1(FT->getNumParams() == NumArgs || (FT->getNumParams() < NumArgs && FT->isVarArg()), "Illegal # arguments for intrinsic function!", IF); } //===----------------------------------------------------------------------===// // Implement the public interfaces to this file... //===----------------------------------------------------------------------===// FunctionPass *llvm::createVerifierPass(VerifierFailureAction action) { return new Verifier(action); } // verifyFunction - Create bool llvm::verifyFunction(const Function &f, VerifierFailureAction action) { Function &F = const_cast(f); assert(!F.isExternal() && "Cannot verify external functions"); FunctionPassManager FPM(new ExistingModuleProvider(F.getParent())); Verifier *V = new Verifier(action); FPM.add(V); FPM.run(F); return V->Broken; } /// verifyModule - Check a module for errors, printing messages on stderr. /// Return true if the module is corrupt. /// bool llvm::verifyModule(const Module &M, VerifierFailureAction action) { PassManager PM; Verifier *V = new Verifier(action); PM.add(V); PM.run((Module&)M); return V->Broken; } // vim: sw=2