1 //===-- Verifier.cpp - Implement the Module Verifier -------------*- C++ -*-==//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the function verifier interface, that can be used for some
11 // sanity checking of input to the system.
13 // Note that this does not provide full `Java style' security and verifications,
14 // instead it just tries to ensure that code is well-formed.
16 // * Both of a binary operator's parameters are of the same type
17 // * Verify that the indices of mem access instructions match other operands
18 // * Verify that arithmetic and other things are only performed on first-class
19 // types. Verify that shifts & logicals only happen on integrals f.e.
20 // * All of the constants in a switch statement are of the correct type
21 // * The code is in valid SSA form
22 // * It should be illegal to put a label into any other type (like a structure)
23 // or to return one. [except constant arrays!]
24 // * Only phi nodes can be self referential: 'add 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 // * Functions cannot take a void-typed parameter
32 // * Verify that a function's argument list agrees with it's declared type.
33 // * It is illegal to specify a name for a void value.
34 // * It is illegal to have a internal global value with no initializer
35 // * It is illegal to have a ret instruction that returns a value that does not
36 // agree with the function return value type.
37 // * Function call argument types match the function prototype
38 // * All other things that are tested by asserts spread about the code...
40 //===----------------------------------------------------------------------===//
42 #include "llvm/Analysis/Verifier.h"
43 #include "llvm/Assembly/Writer.h"
44 #include "llvm/CallingConv.h"
45 #include "llvm/Constants.h"
46 #include "llvm/Pass.h"
47 #include "llvm/Module.h"
48 #include "llvm/ModuleProvider.h"
49 #include "llvm/ParamAttrsList.h"
50 #include "llvm/DerivedTypes.h"
51 #include "llvm/InlineAsm.h"
52 #include "llvm/IntrinsicInst.h"
53 #include "llvm/PassManager.h"
54 #include "llvm/Analysis/Dominators.h"
55 #include "llvm/CodeGen/ValueTypes.h"
56 #include "llvm/Support/CallSite.h"
57 #include "llvm/Support/CFG.h"
58 #include "llvm/Support/InstVisitor.h"
59 #include "llvm/Support/Streams.h"
60 #include "llvm/ADT/SmallPtrSet.h"
61 #include "llvm/ADT/SmallVector.h"
62 #include "llvm/ADT/StringExtras.h"
63 #include "llvm/ADT/STLExtras.h"
64 #include "llvm/Support/Compiler.h"
70 namespace { // Anonymous namespace for class
71 struct VISIBILITY_HIDDEN PreVerifier : public FunctionPass {
72 static char ID; // Pass ID, replacement for typeid
74 PreVerifier() : FunctionPass((intptr_t)&ID) { }
76 // Check that the prerequisites for successful DominatorTree construction
78 bool runOnFunction(Function &F) {
81 for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I) {
82 if (I->empty() || !I->back().isTerminator()) {
83 cerr << "Basic Block does not have terminator!\n";
84 WriteAsOperand(*cerr, I, true);
97 char PreVerifier::ID = 0;
98 RegisterPass<PreVerifier> PreVer("preverify", "Preliminary module verification");
99 const PassInfo *PreVerifyID = PreVer.getPassInfo();
101 struct VISIBILITY_HIDDEN
102 Verifier : public FunctionPass, InstVisitor<Verifier> {
103 static char ID; // Pass ID, replacement for typeid
104 bool Broken; // Is this module found to be broken?
105 bool RealPass; // Are we not being run by a PassManager?
106 VerifierFailureAction action;
107 // What to do if verification fails.
108 Module *Mod; // Module we are verifying right now
109 DominatorTree *DT; // Dominator Tree, caution can be null!
110 std::stringstream msgs; // A stringstream to collect messages
112 /// InstInThisBlock - when verifying a basic block, keep track of all of the
113 /// instructions we have seen so far. This allows us to do efficient
114 /// dominance checks for the case when an instruction has an operand that is
115 /// an instruction in the same block.
116 SmallPtrSet<Instruction*, 16> InstsInThisBlock;
119 : FunctionPass((intptr_t)&ID),
120 Broken(false), RealPass(true), action(AbortProcessAction),
121 DT(0), msgs( std::ios::app | std::ios::out ) {}
122 Verifier( VerifierFailureAction ctn )
123 : FunctionPass((intptr_t)&ID),
124 Broken(false), RealPass(true), action(ctn), DT(0),
125 msgs( std::ios::app | std::ios::out ) {}
127 : FunctionPass((intptr_t)&ID),
128 Broken(false), RealPass(true),
129 action( AB ? AbortProcessAction : PrintMessageAction), DT(0),
130 msgs( std::ios::app | std::ios::out ) {}
131 Verifier(DominatorTree &dt)
132 : FunctionPass((intptr_t)&ID),
133 Broken(false), RealPass(false), action(PrintMessageAction),
134 DT(&dt), msgs( std::ios::app | std::ios::out ) {}
137 bool doInitialization(Module &M) {
139 verifyTypeSymbolTable(M.getTypeSymbolTable());
141 // If this is a real pass, in a pass manager, we must abort before
142 // returning back to the pass manager, or else the pass manager may try to
143 // run other passes on the broken module.
145 return abortIfBroken();
149 bool runOnFunction(Function &F) {
150 // Get dominator information if we are being run by PassManager
151 if (RealPass) DT = &getAnalysis<DominatorTree>();
156 InstsInThisBlock.clear();
158 // If this is a real pass, in a pass manager, we must abort before
159 // returning back to the pass manager, or else the pass manager may try to
160 // run other passes on the broken module.
162 return abortIfBroken();
167 bool doFinalization(Module &M) {
168 // Scan through, checking all of the external function's linkage now...
169 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
170 visitGlobalValue(*I);
172 // Check to make sure function prototypes are okay.
173 if (I->isDeclaration()) visitFunction(*I);
176 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
178 visitGlobalVariable(*I);
180 for (Module::alias_iterator I = M.alias_begin(), E = M.alias_end();
182 visitGlobalAlias(*I);
184 // If the module is broken, abort at this time.
185 return abortIfBroken();
188 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
189 AU.setPreservesAll();
190 AU.addRequiredID(PreVerifyID);
192 AU.addRequired<DominatorTree>();
195 /// abortIfBroken - If the module is broken and we are supposed to abort on
196 /// this condition, do so.
198 bool abortIfBroken() {
200 msgs << "Broken module found, ";
202 case AbortProcessAction:
203 msgs << "compilation aborted!\n";
206 case PrintMessageAction:
207 msgs << "verification continues.\n";
210 case ReturnStatusAction:
211 msgs << "compilation terminated.\n";
219 // Verification methods...
220 void verifyTypeSymbolTable(TypeSymbolTable &ST);
221 void visitGlobalValue(GlobalValue &GV);
222 void visitGlobalVariable(GlobalVariable &GV);
223 void visitGlobalAlias(GlobalAlias &GA);
224 void visitFunction(Function &F);
225 void visitBasicBlock(BasicBlock &BB);
226 void visitTruncInst(TruncInst &I);
227 void visitZExtInst(ZExtInst &I);
228 void visitSExtInst(SExtInst &I);
229 void visitFPTruncInst(FPTruncInst &I);
230 void visitFPExtInst(FPExtInst &I);
231 void visitFPToUIInst(FPToUIInst &I);
232 void visitFPToSIInst(FPToSIInst &I);
233 void visitUIToFPInst(UIToFPInst &I);
234 void visitSIToFPInst(SIToFPInst &I);
235 void visitIntToPtrInst(IntToPtrInst &I);
236 void visitPtrToIntInst(PtrToIntInst &I);
237 void visitBitCastInst(BitCastInst &I);
238 void visitPHINode(PHINode &PN);
239 void visitBinaryOperator(BinaryOperator &B);
240 void visitICmpInst(ICmpInst &IC);
241 void visitFCmpInst(FCmpInst &FC);
242 void visitExtractElementInst(ExtractElementInst &EI);
243 void visitInsertElementInst(InsertElementInst &EI);
244 void visitShuffleVectorInst(ShuffleVectorInst &EI);
245 void visitVAArgInst(VAArgInst &VAA) { visitInstruction(VAA); }
246 void visitCallInst(CallInst &CI);
247 void visitInvokeInst(InvokeInst &II);
248 void visitGetElementPtrInst(GetElementPtrInst &GEP);
249 void visitLoadInst(LoadInst &LI);
250 void visitStoreInst(StoreInst &SI);
251 void visitInstruction(Instruction &I);
252 void visitTerminatorInst(TerminatorInst &I);
253 void visitReturnInst(ReturnInst &RI);
254 void visitSwitchInst(SwitchInst &SI);
255 void visitSelectInst(SelectInst &SI);
256 void visitUserOp1(Instruction &I);
257 void visitUserOp2(Instruction &I) { visitUserOp1(I); }
258 void visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI);
259 void visitAllocationInst(AllocationInst &AI);
260 void visitGetResultInst(GetResultInst &GRI);
262 void VerifyCallSite(CallSite CS);
263 void VerifyIntrinsicPrototype(Intrinsic::ID ID, Function *F,
264 unsigned Count, ...);
265 void VerifyAttrs(ParameterAttributes Attrs, const Type *Ty,
266 bool isReturnValue, const Value *V);
267 void VerifyFunctionAttrs(const FunctionType *FT, const ParamAttrsList *Attrs,
270 void WriteValue(const Value *V) {
272 if (isa<Instruction>(V)) {
275 WriteAsOperand(msgs, V, true, Mod);
280 void WriteType(const Type* T ) {
282 WriteTypeSymbolic(msgs, T, Mod );
286 // CheckFailed - A check failed, so print out the condition and the message
287 // that failed. This provides a nice place to put a breakpoint if you want
288 // to see why something is not correct.
289 void CheckFailed(const std::string &Message,
290 const Value *V1 = 0, const Value *V2 = 0,
291 const Value *V3 = 0, const Value *V4 = 0) {
292 msgs << Message << "\n";
300 void CheckFailed( const std::string& Message, const Value* V1,
301 const Type* T2, const Value* V3 = 0 ) {
302 msgs << Message << "\n";
310 char Verifier::ID = 0;
311 RegisterPass<Verifier> X("verify", "Module Verifier");
312 } // End anonymous namespace
315 // Assert - We know that cond should be true, if not print an error message.
316 #define Assert(C, M) \
317 do { if (!(C)) { CheckFailed(M); return; } } while (0)
318 #define Assert1(C, M, V1) \
319 do { if (!(C)) { CheckFailed(M, V1); return; } } while (0)
320 #define Assert2(C, M, V1, V2) \
321 do { if (!(C)) { CheckFailed(M, V1, V2); return; } } while (0)
322 #define Assert3(C, M, V1, V2, V3) \
323 do { if (!(C)) { CheckFailed(M, V1, V2, V3); return; } } while (0)
324 #define Assert4(C, M, V1, V2, V3, V4) \
325 do { if (!(C)) { CheckFailed(M, V1, V2, V3, V4); return; } } while (0)
328 void Verifier::visitGlobalValue(GlobalValue &GV) {
329 Assert1(!GV.isDeclaration() ||
330 GV.hasExternalLinkage() ||
331 GV.hasDLLImportLinkage() ||
332 GV.hasExternalWeakLinkage() ||
333 (isa<GlobalAlias>(GV) &&
334 (GV.hasInternalLinkage() || GV.hasWeakLinkage())),
335 "Global is external, but doesn't have external or dllimport or weak linkage!",
338 Assert1(!GV.hasDLLImportLinkage() || GV.isDeclaration(),
339 "Global is marked as dllimport, but not external", &GV);
341 Assert1(!GV.hasAppendingLinkage() || isa<GlobalVariable>(GV),
342 "Only global variables can have appending linkage!", &GV);
344 if (GV.hasAppendingLinkage()) {
345 GlobalVariable &GVar = cast<GlobalVariable>(GV);
346 Assert1(isa<ArrayType>(GVar.getType()->getElementType()),
347 "Only global arrays can have appending linkage!", &GV);
351 void Verifier::visitGlobalVariable(GlobalVariable &GV) {
352 if (GV.hasInitializer()) {
353 Assert1(GV.getInitializer()->getType() == GV.getType()->getElementType(),
354 "Global variable initializer type does not match global "
355 "variable type!", &GV);
357 Assert1(GV.hasExternalLinkage() || GV.hasDLLImportLinkage() ||
358 GV.hasExternalWeakLinkage(),
359 "invalid linkage type for global declaration", &GV);
362 visitGlobalValue(GV);
365 void Verifier::visitGlobalAlias(GlobalAlias &GA) {
366 Assert1(!GA.getName().empty(),
367 "Alias name cannot be empty!", &GA);
368 Assert1(GA.hasExternalLinkage() || GA.hasInternalLinkage() ||
370 "Alias should have external or external weak linkage!", &GA);
371 Assert1(GA.getType() == GA.getAliasee()->getType(),
372 "Alias and aliasee types should match!", &GA);
374 if (!isa<GlobalValue>(GA.getAliasee())) {
375 const ConstantExpr *CE = dyn_cast<ConstantExpr>(GA.getAliasee());
376 Assert1(CE && CE->getOpcode() == Instruction::BitCast &&
377 isa<GlobalValue>(CE->getOperand(0)),
378 "Aliasee should be either GlobalValue or bitcast of GlobalValue",
382 visitGlobalValue(GA);
385 void Verifier::verifyTypeSymbolTable(TypeSymbolTable &ST) {
388 // VerifyAttrs - Check the given parameter attributes for an argument or return
389 // value of the specified type. The value V is printed in error messages.
390 void Verifier::VerifyAttrs(ParameterAttributes Attrs, const Type *Ty,
391 bool isReturnValue, const Value *V) {
392 if (Attrs == ParamAttr::None)
396 ParameterAttributes RetI = Attrs & ParamAttr::ParameterOnly;
397 Assert1(!RetI, "Attribute " + ParamAttrsList::getParamAttrsText(RetI) +
398 "does not apply to return values!", V);
400 ParameterAttributes ParmI = Attrs & ParamAttr::ReturnOnly;
401 Assert1(!ParmI, "Attribute " + ParamAttrsList::getParamAttrsText(ParmI) +
402 "only applies to return values!", V);
406 i < array_lengthof(ParamAttr::MutuallyIncompatible); ++i) {
407 ParameterAttributes MutI = Attrs & ParamAttr::MutuallyIncompatible[i];
408 Assert1(!(MutI & (MutI - 1)), "Attributes " +
409 ParamAttrsList::getParamAttrsText(MutI) + "are incompatible!", V);
412 ParameterAttributes TypeI = Attrs & ParamAttr::typeIncompatible(Ty);
413 Assert1(!TypeI, "Wrong type for attribute " +
414 ParamAttrsList::getParamAttrsText(TypeI), V);
417 // VerifyFunctionAttrs - Check parameter attributes against a function type.
418 // The value V is printed in error messages.
419 void Verifier::VerifyFunctionAttrs(const FunctionType *FT,
420 const ParamAttrsList *Attrs,
425 bool SawNest = false;
427 for (unsigned Idx = 0; Idx <= FT->getNumParams(); ++Idx) {
428 ParameterAttributes Attr = Attrs->getParamAttrs(Idx);
430 VerifyAttrs(Attr, FT->getParamType(Idx-1), !Idx, V);
432 if (Attr & ParamAttr::Nest) {
433 Assert1(!SawNest, "More than one parameter has attribute nest!", V);
437 if (Attr & ParamAttr::StructRet) {
438 Assert1(Idx == 1, "Attribute sret not on first parameter!", V);
443 // visitFunction - Verify that a function is ok.
445 void Verifier::visitFunction(Function &F) {
446 // Check function arguments.
447 const FunctionType *FT = F.getFunctionType();
448 unsigned NumArgs = F.arg_size();
450 Assert2(FT->getNumParams() == NumArgs,
451 "# formal arguments must match # of arguments for function type!",
453 Assert1(F.getReturnType()->isFirstClassType() ||
454 F.getReturnType() == Type::VoidTy ||
455 isa<StructType>(F.getReturnType()),
456 "Functions cannot return aggregate values!", &F);
458 Assert1(!F.hasStructRetAttr() || F.getReturnType() == Type::VoidTy,
459 "Invalid struct return type!", &F);
461 const ParamAttrsList *Attrs = F.getParamAttrs();
465 Attrs->getParamIndex(Attrs->size()-1) <= FT->getNumParams()),
466 "Attributes after last parameter!", &F);
468 // Check function attributes.
469 VerifyFunctionAttrs(FT, Attrs, &F);
471 // Check that this function meets the restrictions on this calling convention.
472 switch (F.getCallingConv()) {
477 case CallingConv::Fast:
478 case CallingConv::Cold:
479 case CallingConv::X86_FastCall:
480 Assert1(!F.isVarArg(),
481 "Varargs functions must have C calling conventions!", &F);
485 // Check that the argument values match the function type for this function...
487 for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end();
489 Assert2(I->getType() == FT->getParamType(i),
490 "Argument value does not match function argument type!",
491 I, FT->getParamType(i));
492 // Make sure no aggregates are passed by value.
493 Assert1(I->getType()->isFirstClassType(),
494 "Functions cannot take aggregates as arguments by value!", I);
497 if (F.isDeclaration()) {
498 Assert1(F.hasExternalLinkage() || F.hasDLLImportLinkage() ||
499 F.hasExternalWeakLinkage(),
500 "invalid linkage type for function declaration", &F);
502 // Verify that this function (which has a body) is not named "llvm.*". It
503 // is not legal to define intrinsics.
504 if (F.getName().size() >= 5)
505 Assert1(F.getName().substr(0, 5) != "llvm.",
506 "llvm intrinsics cannot be defined!", &F);
508 // Check the entry node
509 BasicBlock *Entry = &F.getEntryBlock();
510 Assert1(pred_begin(Entry) == pred_end(Entry),
511 "Entry block to function must not have predecessors!", Entry);
516 // verifyBasicBlock - Verify that a basic block is well formed...
518 void Verifier::visitBasicBlock(BasicBlock &BB) {
519 InstsInThisBlock.clear();
521 // Ensure that basic blocks have terminators!
522 Assert1(BB.getTerminator(), "Basic Block does not have terminator!", &BB);
524 // Check constraints that this basic block imposes on all of the PHI nodes in
526 if (isa<PHINode>(BB.front())) {
527 SmallVector<BasicBlock*, 8> Preds(pred_begin(&BB), pred_end(&BB));
528 SmallVector<std::pair<BasicBlock*, Value*>, 8> Values;
529 std::sort(Preds.begin(), Preds.end());
531 for (BasicBlock::iterator I = BB.begin(); (PN = dyn_cast<PHINode>(I));++I) {
533 // Ensure that PHI nodes have at least one entry!
534 Assert1(PN->getNumIncomingValues() != 0,
535 "PHI nodes must have at least one entry. If the block is dead, "
536 "the PHI should be removed!", PN);
537 Assert1(PN->getNumIncomingValues() == Preds.size(),
538 "PHINode should have one entry for each predecessor of its "
539 "parent basic block!", PN);
541 // Get and sort all incoming values in the PHI node...
543 Values.reserve(PN->getNumIncomingValues());
544 for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i)
545 Values.push_back(std::make_pair(PN->getIncomingBlock(i),
546 PN->getIncomingValue(i)));
547 std::sort(Values.begin(), Values.end());
549 for (unsigned i = 0, e = Values.size(); i != e; ++i) {
550 // Check to make sure that if there is more than one entry for a
551 // particular basic block in this PHI node, that the incoming values are
554 Assert4(i == 0 || Values[i].first != Values[i-1].first ||
555 Values[i].second == Values[i-1].second,
556 "PHI node has multiple entries for the same basic block with "
557 "different incoming values!", PN, Values[i].first,
558 Values[i].second, Values[i-1].second);
560 // Check to make sure that the predecessors and PHI node entries are
562 Assert3(Values[i].first == Preds[i],
563 "PHI node entries do not match predecessors!", PN,
564 Values[i].first, Preds[i]);
570 void Verifier::visitTerminatorInst(TerminatorInst &I) {
571 // Ensure that terminators only exist at the end of the basic block.
572 Assert1(&I == I.getParent()->getTerminator(),
573 "Terminator found in the middle of a basic block!", I.getParent());
577 void Verifier::visitReturnInst(ReturnInst &RI) {
578 Function *F = RI.getParent()->getParent();
579 unsigned N = RI.getNumOperands();
581 Assert2(F->getReturnType() == Type::VoidTy,
582 "Found return instr that returns void in Function of non-void "
583 "return type!", &RI, F->getReturnType());
585 Assert2(F->getReturnType() == RI.getOperand(0)->getType(),
586 "Function return type does not match operand "
587 "type of return inst!", &RI, F->getReturnType());
588 else if (const StructType *STy = dyn_cast<StructType>(F->getReturnType())) {
589 for (unsigned i = 0; i < N; i++)
590 Assert2(STy->getElementType(i) == RI.getOperand(i)->getType(),
591 "Function return type does not match operand "
592 "type of return inst!", &RI, F->getReturnType());
594 Assert1(0, "Invalid return type!", &RI);
596 // Check to make sure that the return value has necessary properties for
598 visitTerminatorInst(RI);
601 void Verifier::visitSwitchInst(SwitchInst &SI) {
602 // Check to make sure that all of the constants in the switch instruction
603 // have the same type as the switched-on value.
604 const Type *SwitchTy = SI.getCondition()->getType();
605 for (unsigned i = 1, e = SI.getNumCases(); i != e; ++i)
606 Assert1(SI.getCaseValue(i)->getType() == SwitchTy,
607 "Switch constants must all be same type as switch value!", &SI);
609 visitTerminatorInst(SI);
612 void Verifier::visitSelectInst(SelectInst &SI) {
613 Assert1(SI.getCondition()->getType() == Type::Int1Ty,
614 "Select condition type must be bool!", &SI);
615 Assert1(SI.getTrueValue()->getType() == SI.getFalseValue()->getType(),
616 "Select values must have identical types!", &SI);
617 Assert1(SI.getTrueValue()->getType() == SI.getType(),
618 "Select values must have same type as select instruction!", &SI);
619 visitInstruction(SI);
623 /// visitUserOp1 - User defined operators shouldn't live beyond the lifetime of
624 /// a pass, if any exist, it's an error.
626 void Verifier::visitUserOp1(Instruction &I) {
627 Assert1(0, "User-defined operators should not live outside of a pass!", &I);
630 void Verifier::visitTruncInst(TruncInst &I) {
631 // Get the source and destination types
632 const Type *SrcTy = I.getOperand(0)->getType();
633 const Type *DestTy = I.getType();
635 // Get the size of the types in bits, we'll need this later
636 unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
637 unsigned DestBitSize = DestTy->getPrimitiveSizeInBits();
639 Assert1(SrcTy->isInteger(), "Trunc only operates on integer", &I);
640 Assert1(DestTy->isInteger(), "Trunc only produces integer", &I);
641 Assert1(SrcBitSize > DestBitSize,"DestTy too big for Trunc", &I);
646 void Verifier::visitZExtInst(ZExtInst &I) {
647 // Get the source and destination types
648 const Type *SrcTy = I.getOperand(0)->getType();
649 const Type *DestTy = I.getType();
651 // Get the size of the types in bits, we'll need this later
652 Assert1(SrcTy->isInteger(), "ZExt only operates on integer", &I);
653 Assert1(DestTy->isInteger(), "ZExt only produces an integer", &I);
654 unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
655 unsigned DestBitSize = DestTy->getPrimitiveSizeInBits();
657 Assert1(SrcBitSize < DestBitSize,"Type too small for ZExt", &I);
662 void Verifier::visitSExtInst(SExtInst &I) {
663 // Get the source and destination types
664 const Type *SrcTy = I.getOperand(0)->getType();
665 const Type *DestTy = I.getType();
667 // Get the size of the types in bits, we'll need this later
668 unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
669 unsigned DestBitSize = DestTy->getPrimitiveSizeInBits();
671 Assert1(SrcTy->isInteger(), "SExt only operates on integer", &I);
672 Assert1(DestTy->isInteger(), "SExt only produces an integer", &I);
673 Assert1(SrcBitSize < DestBitSize,"Type too small for SExt", &I);
678 void Verifier::visitFPTruncInst(FPTruncInst &I) {
679 // Get the source and destination types
680 const Type *SrcTy = I.getOperand(0)->getType();
681 const Type *DestTy = I.getType();
682 // Get the size of the types in bits, we'll need this later
683 unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
684 unsigned DestBitSize = DestTy->getPrimitiveSizeInBits();
686 Assert1(SrcTy->isFloatingPoint(),"FPTrunc only operates on FP", &I);
687 Assert1(DestTy->isFloatingPoint(),"FPTrunc only produces an FP", &I);
688 Assert1(SrcBitSize > DestBitSize,"DestTy too big for FPTrunc", &I);
693 void Verifier::visitFPExtInst(FPExtInst &I) {
694 // Get the source and destination types
695 const Type *SrcTy = I.getOperand(0)->getType();
696 const Type *DestTy = I.getType();
698 // Get the size of the types in bits, we'll need this later
699 unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
700 unsigned DestBitSize = DestTy->getPrimitiveSizeInBits();
702 Assert1(SrcTy->isFloatingPoint(),"FPExt only operates on FP", &I);
703 Assert1(DestTy->isFloatingPoint(),"FPExt only produces an FP", &I);
704 Assert1(SrcBitSize < DestBitSize,"DestTy too small for FPExt", &I);
709 void Verifier::visitUIToFPInst(UIToFPInst &I) {
710 // Get the source and destination types
711 const Type *SrcTy = I.getOperand(0)->getType();
712 const Type *DestTy = I.getType();
714 bool SrcVec = SrcTy->getTypeID() == Type::VectorTyID;
715 bool DstVec = DestTy->getTypeID() == Type::VectorTyID;
717 Assert1(SrcVec == DstVec,"UIToFP source and dest must both be vector or scalar", &I);
718 Assert1(SrcTy->isIntOrIntVector(),"UIToFP source must be integer or integer vector", &I);
719 Assert1(DestTy->isFPOrFPVector(),"UIToFP result must be FP or FP vector", &I);
721 if (SrcVec && DstVec)
722 Assert1(cast<VectorType>(SrcTy)->getNumElements() == cast<VectorType>(DestTy)->getNumElements(),
723 "UIToFP source and dest vector length mismatch", &I);
728 void Verifier::visitSIToFPInst(SIToFPInst &I) {
729 // Get the source and destination types
730 const Type *SrcTy = I.getOperand(0)->getType();
731 const Type *DestTy = I.getType();
733 bool SrcVec = SrcTy->getTypeID() == Type::VectorTyID;
734 bool DstVec = DestTy->getTypeID() == Type::VectorTyID;
736 Assert1(SrcVec == DstVec,"SIToFP source and dest must both be vector or scalar", &I);
737 Assert1(SrcTy->isIntOrIntVector(),"SIToFP source must be integer or integer vector", &I);
738 Assert1(DestTy->isFPOrFPVector(),"SIToFP result must be FP or FP vector", &I);
740 if (SrcVec && DstVec)
741 Assert1(cast<VectorType>(SrcTy)->getNumElements() == cast<VectorType>(DestTy)->getNumElements(),
742 "SIToFP source and dest vector length mismatch", &I);
747 void Verifier::visitFPToUIInst(FPToUIInst &I) {
748 // Get the source and destination types
749 const Type *SrcTy = I.getOperand(0)->getType();
750 const Type *DestTy = I.getType();
752 bool SrcVec = SrcTy->getTypeID() == Type::VectorTyID;
753 bool DstVec = DestTy->getTypeID() == Type::VectorTyID;
755 Assert1(SrcVec == DstVec,"FPToUI source and dest must both be vector or scalar", &I);
756 Assert1(SrcTy->isFPOrFPVector(),"FPToUI source must be FP or FP vector", &I);
757 Assert1(DestTy->isIntOrIntVector(),"FPToUI result must be integer or integer vector", &I);
759 if (SrcVec && DstVec)
760 Assert1(cast<VectorType>(SrcTy)->getNumElements() == cast<VectorType>(DestTy)->getNumElements(),
761 "FPToUI source and dest vector length mismatch", &I);
766 void Verifier::visitFPToSIInst(FPToSIInst &I) {
767 // Get the source and destination types
768 const Type *SrcTy = I.getOperand(0)->getType();
769 const Type *DestTy = I.getType();
771 bool SrcVec = SrcTy->getTypeID() == Type::VectorTyID;
772 bool DstVec = DestTy->getTypeID() == Type::VectorTyID;
774 Assert1(SrcVec == DstVec,"FPToSI source and dest must both be vector or scalar", &I);
775 Assert1(SrcTy->isFPOrFPVector(),"FPToSI source must be FP or FP vector", &I);
776 Assert1(DestTy->isIntOrIntVector(),"FPToSI result must be integer or integer vector", &I);
778 if (SrcVec && DstVec)
779 Assert1(cast<VectorType>(SrcTy)->getNumElements() == cast<VectorType>(DestTy)->getNumElements(),
780 "FPToSI source and dest vector length mismatch", &I);
785 void Verifier::visitPtrToIntInst(PtrToIntInst &I) {
786 // Get the source and destination types
787 const Type *SrcTy = I.getOperand(0)->getType();
788 const Type *DestTy = I.getType();
790 Assert1(isa<PointerType>(SrcTy), "PtrToInt source must be pointer", &I);
791 Assert1(DestTy->isInteger(), "PtrToInt result must be integral", &I);
796 void Verifier::visitIntToPtrInst(IntToPtrInst &I) {
797 // Get the source and destination types
798 const Type *SrcTy = I.getOperand(0)->getType();
799 const Type *DestTy = I.getType();
801 Assert1(SrcTy->isInteger(), "IntToPtr source must be an integral", &I);
802 Assert1(isa<PointerType>(DestTy), "IntToPtr result must be a pointer",&I);
807 void Verifier::visitBitCastInst(BitCastInst &I) {
808 // Get the source and destination types
809 const Type *SrcTy = I.getOperand(0)->getType();
810 const Type *DestTy = I.getType();
812 // Get the size of the types in bits, we'll need this later
813 unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
814 unsigned DestBitSize = DestTy->getPrimitiveSizeInBits();
816 // BitCast implies a no-op cast of type only. No bits change.
817 // However, you can't cast pointers to anything but pointers.
818 Assert1(isa<PointerType>(DestTy) == isa<PointerType>(DestTy),
819 "Bitcast requires both operands to be pointer or neither", &I);
820 Assert1(SrcBitSize == DestBitSize, "Bitcast requies types of same width", &I);
825 /// visitPHINode - Ensure that a PHI node is well formed.
827 void Verifier::visitPHINode(PHINode &PN) {
828 // Ensure that the PHI nodes are all grouped together at the top of the block.
829 // This can be tested by checking whether the instruction before this is
830 // either nonexistent (because this is begin()) or is a PHI node. If not,
831 // then there is some other instruction before a PHI.
832 Assert2(&PN == &PN.getParent()->front() ||
833 isa<PHINode>(--BasicBlock::iterator(&PN)),
834 "PHI nodes not grouped at top of basic block!",
835 &PN, PN.getParent());
837 // Check that all of the operands of the PHI node have the same type as the
839 for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i)
840 Assert1(PN.getType() == PN.getIncomingValue(i)->getType(),
841 "PHI node operands are not the same type as the result!", &PN);
843 // All other PHI node constraints are checked in the visitBasicBlock method.
845 visitInstruction(PN);
848 void Verifier::VerifyCallSite(CallSite CS) {
849 Instruction *I = CS.getInstruction();
851 Assert1(isa<PointerType>(CS.getCalledValue()->getType()),
852 "Called function must be a pointer!", I);
853 const PointerType *FPTy = cast<PointerType>(CS.getCalledValue()->getType());
854 Assert1(isa<FunctionType>(FPTy->getElementType()),
855 "Called function is not pointer to function type!", I);
857 const FunctionType *FTy = cast<FunctionType>(FPTy->getElementType());
859 // Verify that the correct number of arguments are being passed
861 Assert1(CS.arg_size() >= FTy->getNumParams(),
862 "Called function requires more parameters than were provided!",I);
864 Assert1(CS.arg_size() == FTy->getNumParams(),
865 "Incorrect number of arguments passed to called function!", I);
867 // Verify that all arguments to the call match the function type...
868 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
869 Assert3(CS.getArgument(i)->getType() == FTy->getParamType(i),
870 "Call parameter type does not match function signature!",
871 CS.getArgument(i), FTy->getParamType(i), I);
873 const ParamAttrsList *Attrs = CS.getParamAttrs();
877 Attrs->getParamIndex(Attrs->size()-1) <= CS.arg_size()),
878 "Attributes after last argument!", I);
880 // Verify call attributes.
881 VerifyFunctionAttrs(FTy, Attrs, I);
883 if (Attrs && FTy->isVarArg())
884 // Check attributes on the varargs part.
885 for (unsigned Idx = 1 + FTy->getNumParams(); Idx <= CS.arg_size(); ++Idx) {
886 ParameterAttributes Attr = Attrs->getParamAttrs(Idx);
888 VerifyAttrs(Attr, CS.getArgument(Idx-1)->getType(), false, I);
890 ParameterAttributes VArgI = Attr & ParamAttr::VarArgsIncompatible;
891 Assert1(!VArgI, "Attribute " + ParamAttrsList::getParamAttrsText(VArgI) +
892 "cannot be used for vararg call arguments!", I);
895 visitInstruction(*I);
898 void Verifier::visitCallInst(CallInst &CI) {
901 if (Function *F = CI.getCalledFunction()) {
902 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
903 visitIntrinsicFunctionCall(ID, CI);
907 void Verifier::visitInvokeInst(InvokeInst &II) {
911 /// visitBinaryOperator - Check that both arguments to the binary operator are
912 /// of the same type!
914 void Verifier::visitBinaryOperator(BinaryOperator &B) {
915 Assert1(B.getOperand(0)->getType() == B.getOperand(1)->getType(),
916 "Both operands to a binary operator are not of the same type!", &B);
918 switch (B.getOpcode()) {
919 // Check that logical operators are only used with integral operands.
920 case Instruction::And:
921 case Instruction::Or:
922 case Instruction::Xor:
923 Assert1(B.getType()->isInteger() ||
924 (isa<VectorType>(B.getType()) &&
925 cast<VectorType>(B.getType())->getElementType()->isInteger()),
926 "Logical operators only work with integral types!", &B);
927 Assert1(B.getType() == B.getOperand(0)->getType(),
928 "Logical operators must have same type for operands and result!",
931 case Instruction::Shl:
932 case Instruction::LShr:
933 case Instruction::AShr:
934 Assert1(B.getType()->isInteger(),
935 "Shift must return an integer result!", &B);
936 Assert1(B.getType() == B.getOperand(0)->getType(),
937 "Shift return type must be same as operands!", &B);
940 // Arithmetic operators only work on integer or fp values
941 Assert1(B.getType() == B.getOperand(0)->getType(),
942 "Arithmetic operators must have same type for operands and result!",
944 Assert1(B.getType()->isInteger() || B.getType()->isFloatingPoint() ||
945 isa<VectorType>(B.getType()),
946 "Arithmetic operators must have integer, fp, or vector type!", &B);
953 void Verifier::visitICmpInst(ICmpInst& IC) {
954 // Check that the operands are the same type
955 const Type* Op0Ty = IC.getOperand(0)->getType();
956 const Type* Op1Ty = IC.getOperand(1)->getType();
957 Assert1(Op0Ty == Op1Ty,
958 "Both operands to ICmp instruction are not of the same type!", &IC);
959 // Check that the operands are the right type
960 Assert1(Op0Ty->isInteger() || isa<PointerType>(Op0Ty),
961 "Invalid operand types for ICmp instruction", &IC);
962 visitInstruction(IC);
965 void Verifier::visitFCmpInst(FCmpInst& FC) {
966 // Check that the operands are the same type
967 const Type* Op0Ty = FC.getOperand(0)->getType();
968 const Type* Op1Ty = FC.getOperand(1)->getType();
969 Assert1(Op0Ty == Op1Ty,
970 "Both operands to FCmp instruction are not of the same type!", &FC);
971 // Check that the operands are the right type
972 Assert1(Op0Ty->isFloatingPoint(),
973 "Invalid operand types for FCmp instruction", &FC);
974 visitInstruction(FC);
977 void Verifier::visitExtractElementInst(ExtractElementInst &EI) {
978 Assert1(ExtractElementInst::isValidOperands(EI.getOperand(0),
980 "Invalid extractelement operands!", &EI);
981 visitInstruction(EI);
984 void Verifier::visitInsertElementInst(InsertElementInst &IE) {
985 Assert1(InsertElementInst::isValidOperands(IE.getOperand(0),
988 "Invalid insertelement operands!", &IE);
989 visitInstruction(IE);
992 void Verifier::visitShuffleVectorInst(ShuffleVectorInst &SV) {
993 Assert1(ShuffleVectorInst::isValidOperands(SV.getOperand(0), SV.getOperand(1),
995 "Invalid shufflevector operands!", &SV);
996 Assert1(SV.getType() == SV.getOperand(0)->getType(),
997 "Result of shufflevector must match first operand type!", &SV);
999 // Check to see if Mask is valid.
1000 if (const ConstantVector *MV = dyn_cast<ConstantVector>(SV.getOperand(2))) {
1001 for (unsigned i = 0, e = MV->getNumOperands(); i != e; ++i) {
1002 Assert1(isa<ConstantInt>(MV->getOperand(i)) ||
1003 isa<UndefValue>(MV->getOperand(i)),
1004 "Invalid shufflevector shuffle mask!", &SV);
1007 Assert1(isa<UndefValue>(SV.getOperand(2)) ||
1008 isa<ConstantAggregateZero>(SV.getOperand(2)),
1009 "Invalid shufflevector shuffle mask!", &SV);
1012 visitInstruction(SV);
1015 void Verifier::visitGetElementPtrInst(GetElementPtrInst &GEP) {
1016 SmallVector<Value*, 16> Idxs(GEP.idx_begin(), GEP.idx_end());
1018 GetElementPtrInst::getIndexedType(GEP.getOperand(0)->getType(),
1019 Idxs.begin(), Idxs.end(), true);
1020 Assert1(ElTy, "Invalid indices for GEP pointer type!", &GEP);
1021 Assert2(isa<PointerType>(GEP.getType()) &&
1022 cast<PointerType>(GEP.getType())->getElementType() == ElTy,
1023 "GEP is not of right type for indices!", &GEP, ElTy);
1024 visitInstruction(GEP);
1027 void Verifier::visitLoadInst(LoadInst &LI) {
1029 cast<PointerType>(LI.getOperand(0)->getType())->getElementType();
1030 Assert2(ElTy == LI.getType(),
1031 "Load result type does not match pointer operand type!", &LI, ElTy);
1032 visitInstruction(LI);
1035 void Verifier::visitStoreInst(StoreInst &SI) {
1037 cast<PointerType>(SI.getOperand(1)->getType())->getElementType();
1038 Assert2(ElTy == SI.getOperand(0)->getType(),
1039 "Stored value type does not match pointer operand type!", &SI, ElTy);
1040 visitInstruction(SI);
1043 void Verifier::visitAllocationInst(AllocationInst &AI) {
1044 const PointerType *PTy = AI.getType();
1045 Assert1(PTy->getAddressSpace() == 0,
1046 "Allocation instruction pointer not in the generic address space!",
1048 Assert1(PTy->getElementType()->isSized(), "Cannot allocate unsized type",
1050 visitInstruction(AI);
1053 void Verifier::visitGetResultInst(GetResultInst &GRI) {
1054 Assert1(GRI.isValidOperands(GRI.getAggregateValue(), GRI.getIndex()),
1055 "Invalid GetResultInst operands!", &GRI);
1056 visitInstruction(GRI);
1060 /// verifyInstruction - Verify that an instruction is well formed.
1062 void Verifier::visitInstruction(Instruction &I) {
1063 BasicBlock *BB = I.getParent();
1064 Assert1(BB, "Instruction not embedded in basic block!", &I);
1066 if (!isa<PHINode>(I)) { // Check that non-phi nodes are not self referential
1067 for (Value::use_iterator UI = I.use_begin(), UE = I.use_end();
1069 Assert1(*UI != (User*)&I ||
1070 !DT->dominates(&BB->getParent()->getEntryBlock(), BB),
1071 "Only PHI nodes may reference their own value!", &I);
1074 // Verify that if this is a terminator that it is at the end of the block.
1075 if (isa<TerminatorInst>(I))
1076 Assert1(BB->getTerminator() == &I, "Terminator not at end of block!", &I);
1079 // Check that void typed values don't have names
1080 Assert1(I.getType() != Type::VoidTy || !I.hasName(),
1081 "Instruction has a name, but provides a void value!", &I);
1083 // Check that the return value of the instruction is either void or a legal
1085 Assert1(I.getType() == Type::VoidTy || I.getType()->isFirstClassType()
1086 || ((isa<CallInst>(I) || isa<InvokeInst>(I))
1087 && isa<StructType>(I.getType())),
1088 "Instruction returns a non-scalar type!", &I);
1090 // Check that all uses of the instruction, if they are instructions
1091 // themselves, actually have parent basic blocks. If the use is not an
1092 // instruction, it is an error!
1093 for (User::use_iterator UI = I.use_begin(), UE = I.use_end();
1095 Assert1(isa<Instruction>(*UI), "Use of instruction is not an instruction!",
1097 Instruction *Used = cast<Instruction>(*UI);
1098 Assert2(Used->getParent() != 0, "Instruction referencing instruction not"
1099 " embeded in a basic block!", &I, Used);
1102 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
1103 Assert1(I.getOperand(i) != 0, "Instruction has null operand!", &I);
1105 // Check to make sure that only first-class-values are operands to
1107 if (!I.getOperand(i)->getType()->isFirstClassType()) {
1108 if (isa<ReturnInst>(I) || isa<GetResultInst>(I))
1109 Assert1(isa<StructType>(I.getOperand(i)->getType()),
1110 "Invalid ReturnInst operands!", &I);
1111 else if (isa<CallInst>(I) || isa<InvokeInst>(I)) {
1112 if (const PointerType *PT = dyn_cast<PointerType>
1113 (I.getOperand(i)->getType())) {
1114 const Type *ETy = PT->getElementType();
1115 Assert1(isa<StructType>(ETy), "Invalid CallInst operands!", &I);
1118 Assert1(0, "Invalid CallInst operands!", &I);
1121 Assert1(0, "Instruction operands must be first-class values!", &I);
1124 if (Function *F = dyn_cast<Function>(I.getOperand(i))) {
1125 // Check to make sure that the "address of" an intrinsic function is never
1127 Assert1(!F->isIntrinsic() || (i == 0 && isa<CallInst>(I)),
1128 "Cannot take the address of an intrinsic!", &I);
1129 Assert1(F->getParent() == Mod, "Referencing function in another module!",
1131 } else if (BasicBlock *OpBB = dyn_cast<BasicBlock>(I.getOperand(i))) {
1132 Assert1(OpBB->getParent() == BB->getParent(),
1133 "Referring to a basic block in another function!", &I);
1134 } else if (Argument *OpArg = dyn_cast<Argument>(I.getOperand(i))) {
1135 Assert1(OpArg->getParent() == BB->getParent(),
1136 "Referring to an argument in another function!", &I);
1137 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(I.getOperand(i))) {
1138 Assert1(GV->getParent() == Mod, "Referencing global in another module!",
1140 } else if (Instruction *Op = dyn_cast<Instruction>(I.getOperand(i))) {
1141 BasicBlock *OpBlock = Op->getParent();
1143 // Check that a definition dominates all of its uses.
1144 if (!isa<PHINode>(I)) {
1145 // Invoke results are only usable in the normal destination, not in the
1146 // exceptional destination.
1147 if (InvokeInst *II = dyn_cast<InvokeInst>(Op)) {
1148 OpBlock = II->getNormalDest();
1150 Assert2(OpBlock != II->getUnwindDest(),
1151 "No uses of invoke possible due to dominance structure!",
1154 // If the normal successor of an invoke instruction has multiple
1155 // predecessors, then the normal edge from the invoke is critical, so
1156 // the invoke value can only be live if the destination block
1157 // dominates all of it's predecessors (other than the invoke) or if
1158 // the invoke value is only used by a phi in the successor.
1159 if (!OpBlock->getSinglePredecessor() &&
1160 DT->dominates(&BB->getParent()->getEntryBlock(), BB)) {
1161 // The first case we allow is if the use is a PHI operand in the
1162 // normal block, and if that PHI operand corresponds to the invoke's
1165 if (PHINode *PN = dyn_cast<PHINode>(&I))
1166 if (PN->getParent() == OpBlock &&
1167 PN->getIncomingBlock(i/2) == Op->getParent())
1170 // If it is used by something non-phi, then the other case is that
1171 // 'OpBlock' dominates all of its predecessors other than the
1172 // invoke. In this case, the invoke value can still be used.
1175 for (pred_iterator PI = pred_begin(OpBlock),
1176 E = pred_end(OpBlock); PI != E; ++PI) {
1177 if (*PI != II->getParent() && !DT->dominates(OpBlock, *PI)) {
1184 "Invoke value defined on critical edge but not dead!", &I,
1187 } else if (OpBlock == BB) {
1188 // If they are in the same basic block, make sure that the definition
1189 // comes before the use.
1190 Assert2(InstsInThisBlock.count(Op) ||
1191 !DT->dominates(&BB->getParent()->getEntryBlock(), BB),
1192 "Instruction does not dominate all uses!", Op, &I);
1195 // Definition must dominate use unless use is unreachable!
1196 Assert2(DT->dominates(OpBlock, BB) ||
1197 !DT->dominates(&BB->getParent()->getEntryBlock(), BB),
1198 "Instruction does not dominate all uses!", Op, &I);
1200 // PHI nodes are more difficult than other nodes because they actually
1201 // "use" the value in the predecessor basic blocks they correspond to.
1202 BasicBlock *PredBB = cast<BasicBlock>(I.getOperand(i+1));
1203 Assert2(DT->dominates(OpBlock, PredBB) ||
1204 !DT->dominates(&BB->getParent()->getEntryBlock(), PredBB),
1205 "Instruction does not dominate all uses!", Op, &I);
1207 } else if (isa<InlineAsm>(I.getOperand(i))) {
1208 Assert1(i == 0 && (isa<CallInst>(I) || isa<InvokeInst>(I)),
1209 "Cannot take the address of an inline asm!", &I);
1212 InstsInThisBlock.insert(&I);
1215 /// visitIntrinsicFunction - Allow intrinsics to be verified in different ways.
1217 void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) {
1218 Function *IF = CI.getCalledFunction();
1219 Assert1(IF->isDeclaration(), "Intrinsic functions should never be defined!",
1222 #define GET_INTRINSIC_VERIFIER
1223 #include "llvm/Intrinsics.gen"
1224 #undef GET_INTRINSIC_VERIFIER
1229 case Intrinsic::gcroot:
1230 case Intrinsic::gcwrite:
1231 case Intrinsic::gcread: {
1232 Type *PtrTy = PointerType::getUnqual(Type::Int8Ty),
1233 *PtrPtrTy = PointerType::getUnqual(PtrTy);
1238 case Intrinsic::gcroot:
1239 Assert1(CI.getOperand(1)->getType() == PtrPtrTy,
1240 "Intrinsic parameter #1 is not i8**.", &CI);
1241 Assert1(CI.getOperand(2)->getType() == PtrTy,
1242 "Intrinsic parameter #2 is not i8*.", &CI);
1243 Assert1(isa<AllocaInst>(
1244 IntrinsicInst::StripPointerCasts(CI.getOperand(1))),
1245 "llvm.gcroot parameter #1 must be an alloca.", &CI);
1246 Assert1(isa<Constant>(CI.getOperand(2)),
1247 "llvm.gcroot parameter #2 must be a constant.", &CI);
1249 case Intrinsic::gcwrite:
1250 Assert1(CI.getOperand(1)->getType() == PtrTy,
1251 "Intrinsic parameter #1 is not a i8*.", &CI);
1252 Assert1(CI.getOperand(2)->getType() == PtrTy,
1253 "Intrinsic parameter #2 is not a i8*.", &CI);
1254 Assert1(CI.getOperand(3)->getType() == PtrPtrTy,
1255 "Intrinsic parameter #3 is not a i8**.", &CI);
1257 case Intrinsic::gcread:
1258 Assert1(CI.getOperand(1)->getType() == PtrTy,
1259 "Intrinsic parameter #1 is not a i8*.", &CI);
1260 Assert1(CI.getOperand(2)->getType() == PtrPtrTy,
1261 "Intrinsic parameter #2 is not a i8**.", &CI);
1265 Assert1(CI.getParent()->getParent()->hasCollector(),
1266 "Enclosing function does not specify a collector algorithm.",
1269 case Intrinsic::init_trampoline:
1270 Assert1(isa<Function>(IntrinsicInst::StripPointerCasts(CI.getOperand(2))),
1271 "llvm.init_trampoline parameter #2 must resolve to a function.",
1277 /// VerifyIntrinsicPrototype - TableGen emits calls to this function into
1278 /// Intrinsics.gen. This implements a little state machine that verifies the
1279 /// prototype of intrinsics.
1280 void Verifier::VerifyIntrinsicPrototype(Intrinsic::ID ID,
1282 unsigned Count, ...) {
1284 va_start(VA, Count);
1286 const FunctionType *FTy = F->getFunctionType();
1288 // For overloaded intrinsics, the Suffix of the function name must match the
1289 // types of the arguments. This variable keeps track of the expected
1290 // suffix, to be checked at the end.
1293 if (FTy->getNumParams() + FTy->isVarArg() != Count - 1) {
1294 CheckFailed("Intrinsic prototype has incorrect number of arguments!", F);
1298 // Note that "arg#0" is the return type.
1299 for (unsigned ArgNo = 0; ArgNo < Count; ++ArgNo) {
1300 MVT::ValueType VT = va_arg(VA, MVT::ValueType);
1302 if (VT == MVT::isVoid && ArgNo > 0) {
1303 if (!FTy->isVarArg())
1304 CheckFailed("Intrinsic prototype has no '...'!", F);
1310 Ty = FTy->getReturnType();
1312 Ty = FTy->getParamType(ArgNo-1);
1314 unsigned NumElts = 0;
1315 const Type *EltTy = Ty;
1316 if (const VectorType *VTy = dyn_cast<VectorType>(Ty)) {
1317 EltTy = VTy->getElementType();
1318 NumElts = VTy->getNumElements();
1324 if (Ty != FTy->getReturnType()) {
1325 CheckFailed("Intrinsic parameter #" + utostr(ArgNo-1) + " does not "
1326 "match return type.", F);
1330 if (Ty != FTy->getParamType(Match-1)) {
1331 CheckFailed("Intrinsic parameter #" + utostr(ArgNo-1) + " does not "
1332 "match parameter %" + utostr(Match-1) + ".", F);
1336 } else if (VT == MVT::iAny) {
1337 if (!EltTy->isInteger()) {
1339 CheckFailed("Intrinsic result type is not "
1340 "an integer type.", F);
1342 CheckFailed("Intrinsic parameter #" + utostr(ArgNo-1) + " is not "
1343 "an integer type.", F);
1346 unsigned GotBits = cast<IntegerType>(EltTy)->getBitWidth();
1349 Suffix += "v" + utostr(NumElts);
1350 Suffix += "i" + utostr(GotBits);;
1351 // Check some constraints on various intrinsics.
1353 default: break; // Not everything needs to be checked.
1354 case Intrinsic::bswap:
1355 if (GotBits < 16 || GotBits % 16 != 0)
1356 CheckFailed("Intrinsic requires even byte width argument", F);
1359 } else if (VT == MVT::fAny) {
1360 if (!EltTy->isFloatingPoint()) {
1362 CheckFailed("Intrinsic result type is not "
1363 "a floating-point type.", F);
1365 CheckFailed("Intrinsic parameter #" + utostr(ArgNo-1) + " is not "
1366 "a floating-point type.", F);
1371 Suffix += "v" + utostr(NumElts);
1372 Suffix += MVT::getValueTypeString(MVT::getValueType(EltTy));
1373 } else if (VT == MVT::iPTR) {
1374 if (!isa<PointerType>(Ty)) {
1376 CheckFailed("Intrinsic result type is not a "
1377 "pointer and a pointer is required.", F);
1379 CheckFailed("Intrinsic parameter #" + utostr(ArgNo-1) + " is not a "
1380 "pointer and a pointer is required.", F);
1383 } else if (MVT::isVector(VT)) {
1384 // If this is a vector argument, verify the number and type of elements.
1385 if (MVT::getVectorElementType(VT) != MVT::getValueType(EltTy)) {
1386 CheckFailed("Intrinsic prototype has incorrect vector element type!",
1390 if (MVT::getVectorNumElements(VT) != NumElts) {
1391 CheckFailed("Intrinsic prototype has incorrect number of "
1392 "vector elements!",F);
1395 } else if (MVT::getTypeForValueType(VT) != EltTy) {
1397 CheckFailed("Intrinsic prototype has incorrect result type!", F);
1399 CheckFailed("Intrinsic parameter #" + utostr(ArgNo-1) + " is wrong!",F);
1401 } else if (EltTy != Ty) {
1403 CheckFailed("Intrinsic result type is vector "
1404 "and a scalar is required.", F);
1406 CheckFailed("Intrinsic parameter #" + utostr(ArgNo-1) + " is vector "
1407 "and a scalar is required.", F);
1413 // If we computed a Suffix then the intrinsic is overloaded and we need to
1414 // make sure that the name of the function is correct. We add the suffix to
1415 // the name of the intrinsic and compare against the given function name. If
1416 // they are not the same, the function name is invalid. This ensures that
1417 // overloading of intrinsics uses a sane and consistent naming convention.
1418 if (!Suffix.empty()) {
1419 std::string Name(Intrinsic::getName(ID));
1420 if (Name + Suffix != F->getName())
1421 CheckFailed("Overloaded intrinsic has incorrect suffix: '" +
1422 F->getName().substr(Name.length()) + "'. It should be '" +
1428 //===----------------------------------------------------------------------===//
1429 // Implement the public interfaces to this file...
1430 //===----------------------------------------------------------------------===//
1432 FunctionPass *llvm::createVerifierPass(VerifierFailureAction action) {
1433 return new Verifier(action);
1437 // verifyFunction - Create
1438 bool llvm::verifyFunction(const Function &f, VerifierFailureAction action) {
1439 Function &F = const_cast<Function&>(f);
1440 assert(!F.isDeclaration() && "Cannot verify external functions");
1442 FunctionPassManager FPM(new ExistingModuleProvider(F.getParent()));
1443 Verifier *V = new Verifier(action);
1449 /// verifyModule - Check a module for errors, printing messages on stderr.
1450 /// Return true if the module is corrupt.
1452 bool llvm::verifyModule(const Module &M, VerifierFailureAction action,
1453 std::string *ErrorInfo) {
1455 Verifier *V = new Verifier(action);
1459 if (ErrorInfo && V->Broken)
1460 *ErrorInfo = V->msgs.str();