#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringExtras.h"
-#include "llvm/DebugInfo.h"
+#include "llvm/IR/CFG.h"
+#include "llvm/IR/CallSite.h"
#include "llvm/IR/CallingConv.h"
+#include "llvm/IR/ConstantRange.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/InlineAsm.h"
+#include "llvm/IR/InstIterator.h"
+#include "llvm/IR/InstVisitor.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Metadata.h"
#include "llvm/IR/Module.h"
-#include "llvm/InstVisitor.h"
+#include "llvm/IR/PassManager.h"
#include "llvm/Pass.h"
-#include "llvm/PassManager.h"
-#include "llvm/Support/CFG.h"
-#include "llvm/Support/CallSite.h"
#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/ConstantRange.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include <cstdarg>
using namespace llvm;
-static cl::opt<bool> DisableDebugInfoVerifier("disable-debug-info-verifier",
- cl::init(true));
+static cl::opt<bool> VerifyDebugInfo("verify-debug-info", cl::init(false));
namespace {
-struct Verifier : public FunctionPass, public InstVisitor<Verifier> {
- static char ID;
+struct VerifierSupport {
+ raw_ostream &OS;
+ const Module *M;
+
+ /// \brief Track the brokenness of the module while recursively visiting.
+ bool Broken;
- // What to do if verification fails.
- VerifierFailureAction Action;
+ explicit VerifierSupport(raw_ostream &OS)
+ : OS(OS), M(nullptr), Broken(false) {}
+
+ void WriteValue(const Value *V) {
+ if (!V)
+ return;
+ if (isa<Instruction>(V)) {
+ OS << *V << '\n';
+ } else {
+ V->printAsOperand(OS, true, M);
+ OS << '\n';
+ }
+ }
+
+ void WriteType(Type *T) {
+ if (!T)
+ return;
+ OS << ' ' << *T;
+ }
+
+ // 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 Twine &Message, const Value *V1 = nullptr,
+ const Value *V2 = nullptr, const Value *V3 = nullptr,
+ const Value *V4 = nullptr) {
+ OS << Message.str() << "\n";
+ WriteValue(V1);
+ WriteValue(V2);
+ WriteValue(V3);
+ WriteValue(V4);
+ Broken = true;
+ }
+
+ void CheckFailed(const Twine &Message, const Value *V1, Type *T2,
+ const Value *V3 = nullptr) {
+ OS << Message.str() << "\n";
+ WriteValue(V1);
+ WriteType(T2);
+ WriteValue(V3);
+ Broken = true;
+ }
+
+ void CheckFailed(const Twine &Message, Type *T1, Type *T2 = nullptr,
+ Type *T3 = nullptr) {
+ OS << Message.str() << "\n";
+ WriteType(T1);
+ WriteType(T2);
+ WriteType(T3);
+ Broken = true;
+ }
+};
+class Verifier : public InstVisitor<Verifier>, VerifierSupport {
+ friend class InstVisitor<Verifier>;
- Module *M;
LLVMContext *Context;
const DataLayout *DL;
DominatorTree DT;
- bool Broken;
- std::string Messages;
- raw_string_ostream MessagesStr;
-
/// \brief When verifying a basic block, keep track of all of the
/// instructions we have seen so far.
///
/// personality function.
const Value *PersonalityFn;
- /// \brief Finder keeps track of all debug info MDNodes in a Module.
- DebugInfoFinder Finder;
-
- Verifier()
- : FunctionPass(ID), Action(AbortProcessAction), M(0), Context(0), DL(0),
- Broken(false), MessagesStr(Messages), PersonalityFn(0) {
- initializeVerifierPass(*PassRegistry::getPassRegistry());
- }
- explicit Verifier(VerifierFailureAction Action)
- : FunctionPass(ID), Action(Action), M(0), Context(0), DL(0),
- Broken(false), MessagesStr(Messages), PersonalityFn(0) {
- initializeVerifierPass(*PassRegistry::getPassRegistry());
- }
-
- bool doInitialization(Module &M) {
- this->M = &M;
- Context = &M.getContext();
-
- DL = getAnalysisIfAvailable<DataLayout>();
+public:
+ explicit Verifier(raw_ostream &OS = dbgs())
+ : VerifierSupport(OS), Context(nullptr), DL(nullptr),
+ PersonalityFn(nullptr) {}
- // 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.
- return abortIfBroken();
- }
-
- bool runOnFunction(Function &F) {
- Broken = false;
+ bool verify(const Function &F) {
+ M = F.getParent();
+ Context = &M->getContext();
// First ensure the function is well-enough formed to compute dominance
// information.
- for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I) {
+ if (F.empty()) {
+ OS << "Function '" << F.getName()
+ << "' does not contain an entry block!\n";
+ return false;
+ }
+ for (Function::const_iterator I = F.begin(), E = F.end(); I != E; ++I) {
if (I->empty() || !I->back().isTerminator()) {
- dbgs() << "Basic Block in function '" << F.getName()
- << "' does not have terminator!\n";
- I->printAsOperand(dbgs(), true);
- dbgs() << "\n";
- Broken = true;
+ OS << "Basic Block in function '" << F.getName()
+ << "' does not have terminator!\n";
+ I->printAsOperand(OS, true);
+ OS << "\n";
+ return false;
}
}
- if (Broken)
- return abortIfBroken();
// Now directly compute a dominance tree. We don't rely on the pass
// manager to provide this as it isolates us from a potentially
// out-of-date dominator tree and makes it significantly more complex to
// run this code outside of a pass manager.
- DT.recalculate(F);
-
- M = F.getParent();
- if (!Context)
- Context = &F.getContext();
+ // FIXME: It's really gross that we have to cast away constness here.
+ DT.recalculate(const_cast<Function &>(F));
- Finder.reset();
- visit(F);
+ Broken = false;
+ // FIXME: We strip const here because the inst visitor strips const.
+ visit(const_cast<Function &>(F));
InstsInThisBlock.clear();
- PersonalityFn = 0;
+ PersonalityFn = nullptr;
- if (!DisableDebugInfoVerifier)
- // Verify Debug Info.
- verifyDebugInfo();
-
- // 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.
- return abortIfBroken();
+ return !Broken;
}
- bool doFinalization(Module &M) {
+ bool verify(const Module &M) {
+ this->M = &M;
+ Context = &M.getContext();
+ Broken = false;
+
// Scan through, checking all of the external function's linkage now...
- for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
+ for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) {
visitGlobalValue(*I);
// Check to make sure function prototypes are okay.
visitFunction(*I);
}
- for (Module::global_iterator I = M.global_begin(), E = M.global_end();
+ for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I)
visitGlobalVariable(*I);
- for (Module::alias_iterator I = M.alias_begin(), E = M.alias_end(); I != E;
- ++I)
+ for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
+ I != E; ++I)
visitGlobalAlias(*I);
- for (Module::named_metadata_iterator I = M.named_metadata_begin(),
- E = M.named_metadata_end();
+ for (Module::const_named_metadata_iterator I = M.named_metadata_begin(),
+ E = M.named_metadata_end();
I != E; ++I)
visitNamedMDNode(*I);
visitModuleFlags(M);
visitModuleIdents(M);
- if (!DisableDebugInfoVerifier) {
- Finder.reset();
- Finder.processModule(M);
- // Verify Debug Info.
- verifyDebugInfo();
- }
-
- // If the module is broken, abort at this time.
- return abortIfBroken();
- }
-
- virtual void getAnalysisUsage(AnalysisUsage &AU) const {
- AU.setPreservesAll();
- }
-
- /// abortIfBroken - If the module is broken and we are supposed to abort on
- /// this condition, do so.
- ///
- bool abortIfBroken() {
- if (!Broken)
- return false;
- MessagesStr << "Broken module found, ";
- switch (Action) {
- case AbortProcessAction:
- MessagesStr << "compilation aborted!\n";
- dbgs() << MessagesStr.str();
- // Client should choose different reaction if abort is not desired
- abort();
- case PrintMessageAction:
- MessagesStr << "verification continues.\n";
- dbgs() << MessagesStr.str();
- return false;
- case ReturnStatusAction:
- MessagesStr << "compilation terminated.\n";
- return true;
- }
- llvm_unreachable("Invalid action");
+ return !Broken;
}
+private:
// Verification methods...
- void visitGlobalValue(GlobalValue &GV);
- void visitGlobalVariable(GlobalVariable &GV);
- void visitGlobalAlias(GlobalAlias &GA);
- void visitNamedMDNode(NamedMDNode &NMD);
+ void visitGlobalValue(const GlobalValue &GV);
+ void visitGlobalVariable(const GlobalVariable &GV);
+ void visitGlobalAlias(const GlobalAlias &GA);
+ void visitNamedMDNode(const NamedMDNode &NMD);
void visitMDNode(MDNode &MD, Function *F);
- void visitModuleIdents(Module &M);
- void visitModuleFlags(Module &M);
- void visitModuleFlag(MDNode *Op, DenseMap<MDString *, MDNode *> &SeenIDs,
- SmallVectorImpl<MDNode *> &Requirements);
- void visitFunction(Function &F);
+ void visitModuleIdents(const Module &M);
+ void visitModuleFlags(const Module &M);
+ void visitModuleFlag(const MDNode *Op,
+ DenseMap<const MDString *, const MDNode *> &SeenIDs,
+ SmallVectorImpl<const MDNode *> &Requirements);
+ void visitFunction(const Function &F);
void visitBasicBlock(BasicBlock &BB);
- using InstVisitor<Verifier>::visit;
+ // InstVisitor overrides...
+ using InstVisitor<Verifier>::visit;
void visit(Instruction &I);
void visitTruncInst(TruncInst &I);
void visitLandingPadInst(LandingPadInst &LPI);
void VerifyCallSite(CallSite CS);
+ void verifyMustTailCall(CallInst &CI);
bool PerformTypeCheck(Intrinsic::ID ID, Function *F, Type *Ty, int VT,
unsigned ArgNo, std::string &Suffix);
bool VerifyIntrinsicType(Type *Ty, ArrayRef<Intrinsic::IITDescriptor> &Infos,
void VerifyBitcastType(const Value *V, Type *DestTy, Type *SrcTy);
void VerifyConstantExprBitcastType(const ConstantExpr *CE);
+};
+class DebugInfoVerifier : public VerifierSupport {
+public:
+ explicit DebugInfoVerifier(raw_ostream &OS = dbgs()) : VerifierSupport(OS) {}
- void verifyDebugInfo();
-
- void WriteValue(const Value *V) {
- if (!V)
- return;
- if (isa<Instruction>(V)) {
- MessagesStr << *V << '\n';
- } else {
- V->printAsOperand(MessagesStr, true, M);
- MessagesStr << '\n';
- }
- }
-
- void WriteType(Type *T) {
- if (!T)
- return;
- MessagesStr << ' ' << *T;
- }
-
- // 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 Twine &Message, const Value *V1 = 0,
- const Value *V2 = 0, const Value *V3 = 0,
- const Value *V4 = 0) {
- MessagesStr << Message.str() << "\n";
- WriteValue(V1);
- WriteValue(V2);
- WriteValue(V3);
- WriteValue(V4);
- Broken = true;
- }
-
- void CheckFailed(const Twine &Message, const Value *V1, Type *T2,
- const Value *V3 = 0) {
- MessagesStr << Message.str() << "\n";
- WriteValue(V1);
- WriteType(T2);
- WriteValue(V3);
- Broken = true;
+ bool verify(const Module &M) {
+ this->M = &M;
+ verifyDebugInfo();
+ return !Broken;
}
- void CheckFailed(const Twine &Message, Type *T1, Type *T2 = 0, Type *T3 = 0) {
- MessagesStr << Message.str() << "\n";
- WriteType(T1);
- WriteType(T2);
- WriteType(T3);
- Broken = true;
- }
+private:
+ void verifyDebugInfo();
+ void processInstructions(DebugInfoFinder &Finder);
+ void processCallInst(DebugInfoFinder &Finder, const CallInst &CI);
};
} // End anonymous namespace
-char Verifier::ID = 0;
-INITIALIZE_PASS(Verifier, "verify", "Module Verifier", false, false)
-
// 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)
void Verifier::visit(Instruction &I) {
for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
- Assert1(I.getOperand(i) != 0, "Operand is null", &I);
+ Assert1(I.getOperand(i) != nullptr, "Operand is null", &I);
InstVisitor<Verifier>::visit(I);
}
-void Verifier::visitGlobalValue(GlobalValue &GV) {
- Assert1(!GV.isDeclaration() ||
- GV.isMaterializable() ||
- GV.hasExternalLinkage() ||
- GV.hasExternalWeakLinkage() ||
- (isa<GlobalAlias>(GV) &&
- (GV.hasLocalLinkage() || GV.hasWeakLinkage())),
+void Verifier::visitGlobalValue(const GlobalValue &GV) {
+ Assert1(!GV.isDeclaration() || GV.isMaterializable() ||
+ GV.hasExternalLinkage() || GV.hasExternalWeakLinkage(),
"Global is external, but doesn't have external or weak linkage!",
&GV);
"Only global variables can have appending linkage!", &GV);
if (GV.hasAppendingLinkage()) {
- GlobalVariable *GVar = dyn_cast<GlobalVariable>(&GV);
+ const GlobalVariable *GVar = dyn_cast<GlobalVariable>(&GV);
Assert1(GVar && GVar->getType()->getElementType()->isArrayTy(),
"Only global arrays can have appending linkage!", GVar);
}
}
-void Verifier::visitGlobalVariable(GlobalVariable &GV) {
+void Verifier::visitGlobalVariable(const GlobalVariable &GV) {
if (GV.hasInitializer()) {
Assert1(GV.getInitializer()->getType() == GV.getType()->getElementType(),
"Global variable initializer type does not match global "
PointerType *PTy = dyn_cast<PointerType>(ATy->getElementType());
Assert1(PTy, "wrong type for intrinsic global variable", &GV);
if (GV.hasInitializer()) {
- Constant *Init = GV.getInitializer();
- ConstantArray *InitArray = dyn_cast<ConstantArray>(Init);
+ const Constant *Init = GV.getInitializer();
+ const ConstantArray *InitArray = dyn_cast<ConstantArray>(Init);
Assert1(InitArray, "wrong initalizer for intrinsic global variable",
Init);
for (unsigned i = 0, e = InitArray->getNumOperands(); i != e; ++i) {
visitGlobalValue(GV);
}
-void Verifier::visitGlobalAlias(GlobalAlias &GA) {
+void Verifier::visitGlobalAlias(const GlobalAlias &GA) {
Assert1(!GA.getName().empty(),
"Alias name cannot be empty!", &GA);
Assert1(GlobalAlias::isValidLinkage(GA.getLinkage()),
"Alias and aliasee types should match!", &GA);
Assert1(!GA.hasUnnamedAddr(), "Alias cannot have unnamed_addr!", &GA);
- Constant *Aliasee = GA.getAliasee();
-
- if (!isa<GlobalValue>(Aliasee)) {
- ConstantExpr *CE = dyn_cast<ConstantExpr>(Aliasee);
- Assert1(CE &&
- (CE->getOpcode() == Instruction::BitCast ||
- CE->getOpcode() == Instruction::AddrSpaceCast ||
- CE->getOpcode() == Instruction::GetElementPtr) &&
- isa<GlobalValue>(CE->getOperand(0)),
- "Aliasee should be either GlobalValue, bitcast or "
- "addrspacecast of GlobalValue",
+ const Constant *Aliasee = GA.getAliasee();
+ const GlobalValue *GV = dyn_cast<GlobalValue>(Aliasee);
+
+ if (!GV) {
+ const ConstantExpr *CE = dyn_cast<ConstantExpr>(Aliasee);
+ if (CE && (CE->getOpcode() == Instruction::BitCast ||
+ CE->getOpcode() == Instruction::AddrSpaceCast ||
+ CE->getOpcode() == Instruction::GetElementPtr))
+ GV = dyn_cast<GlobalValue>(CE->getOperand(0));
+
+ Assert1(GV, "Aliasee should be either GlobalValue, bitcast or "
+ "addrspacecast of GlobalValue",
&GA);
if (CE->getOpcode() == Instruction::BitCast) {
- unsigned SrcAS = CE->getOperand(0)->getType()->getPointerAddressSpace();
+ unsigned SrcAS = GV->getType()->getPointerAddressSpace();
unsigned DstAS = CE->getType()->getPointerAddressSpace();
Assert1(SrcAS == DstAS,
&GA);
}
}
+ Assert1(!GV->isDeclaration(), "Alias must point to a definition", &GA);
+ if (const GlobalAlias *GAAliasee = dyn_cast<GlobalAlias>(GV)) {
+ Assert1(!GAAliasee->mayBeOverridden(), "Alias cannot point to a weak alias",
+ &GA);
+ }
- const GlobalValue* Resolved = GA.resolveAliasedGlobal(/*stopOnWeak*/ false);
- Assert1(Resolved,
- "Aliasing chain should end with function or global variable", &GA);
+ const GlobalValue *AG = GA.getAliasedGlobal();
+ Assert1(AG, "Aliasing chain should end with function or global variable",
+ &GA);
visitGlobalValue(GA);
}
-void Verifier::visitNamedMDNode(NamedMDNode &NMD) {
+void Verifier::visitNamedMDNode(const NamedMDNode &NMD) {
for (unsigned i = 0, e = NMD.getNumOperands(); i != e; ++i) {
MDNode *MD = NMD.getOperand(i);
if (!MD)
Assert1(!MD->isFunctionLocal(),
"Named metadata operand cannot be function local!", MD);
- visitMDNode(*MD, 0);
+ visitMDNode(*MD, nullptr);
}
}
// If this was an instruction, bb, or argument, verify that it is in the
// function that we expect.
- Function *ActualF = 0;
+ Function *ActualF = nullptr;
if (Instruction *I = dyn_cast<Instruction>(Op))
ActualF = I->getParent()->getParent();
else if (BasicBlock *BB = dyn_cast<BasicBlock>(Op))
}
}
-void Verifier::visitModuleIdents(Module &M) {
+void Verifier::visitModuleIdents(const Module &M) {
const NamedMDNode *Idents = M.getNamedMetadata("llvm.ident");
if (!Idents)
return;
}
}
-void Verifier::visitModuleFlags(Module &M) {
+void Verifier::visitModuleFlags(const Module &M) {
const NamedMDNode *Flags = M.getModuleFlagsMetadata();
if (!Flags) return;
// Scan each flag, and track the flags and requirements.
- DenseMap<MDString*, MDNode*> SeenIDs;
- SmallVector<MDNode*, 16> Requirements;
+ DenseMap<const MDString*, const MDNode*> SeenIDs;
+ SmallVector<const MDNode*, 16> Requirements;
for (unsigned I = 0, E = Flags->getNumOperands(); I != E; ++I) {
visitModuleFlag(Flags->getOperand(I), SeenIDs, Requirements);
}
// Validate that the requirements in the module are valid.
for (unsigned I = 0, E = Requirements.size(); I != E; ++I) {
- MDNode *Requirement = Requirements[I];
- MDString *Flag = cast<MDString>(Requirement->getOperand(0));
- Value *ReqValue = Requirement->getOperand(1);
+ const MDNode *Requirement = Requirements[I];
+ const MDString *Flag = cast<MDString>(Requirement->getOperand(0));
+ const Value *ReqValue = Requirement->getOperand(1);
- MDNode *Op = SeenIDs.lookup(Flag);
+ const MDNode *Op = SeenIDs.lookup(Flag);
if (!Op) {
CheckFailed("invalid requirement on flag, flag is not present in module",
Flag);
}
}
-void Verifier::visitModuleFlag(MDNode *Op, DenseMap<MDString*, MDNode*>&SeenIDs,
- SmallVectorImpl<MDNode*> &Requirements) {
+void
+Verifier::visitModuleFlag(const MDNode *Op,
+ DenseMap<const MDString *, const MDNode *> &SeenIDs,
+ SmallVectorImpl<const MDNode *> &Requirements) {
// Each module flag should have three arguments, the merge behavior (a
// constant int), the flag ID (an MDString), and the value.
Assert1(Op->getNumOperands() == 3,
bool SawNest = false;
bool SawReturned = false;
+ bool SawSRet = false;
for (unsigned i = 0, e = Attrs.getNumSlots(); i != e; ++i) {
unsigned Idx = Attrs.getSlotIndex(i);
SawReturned = true;
}
- if (Attrs.hasAttribute(Idx, Attribute::StructRet))
- Assert1(Idx == 1, "Attribute sret is not on first parameter!", V);
+ if (Attrs.hasAttribute(Idx, Attribute::StructRet)) {
+ Assert1(!SawSRet, "Cannot have multiple 'sret' parameters!", V);
+ Assert1(Idx == 1 || Idx == 2,
+ "Attribute 'sret' is not on first or second parameter!", V);
+ SawSRet = true;
+ }
if (Attrs.hasAttribute(Idx, Attribute::InAlloca)) {
Assert1(Idx == FT->getNumParams(),
// visitFunction - Verify that a function is ok.
//
-void Verifier::visitFunction(Function &F) {
+void Verifier::visitFunction(const Function &F) {
// Check function arguments.
FunctionType *FT = F.getFunctionType();
unsigned NumArgs = F.arg_size();
// 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) {
+ for (Function::const_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));
Assert1(!isLLVMdotName, "llvm intrinsics cannot be defined!", &F);
// Check the entry node
- BasicBlock *Entry = &F.getEntryBlock();
+ const BasicBlock *Entry = &F.getEntryBlock();
Assert1(pred_begin(Entry) == pred_end(Entry),
"Entry block to function must not have predecessors!", Entry);
// The address of the entry block cannot be taken, unless it is dead.
if (Entry->hasAddressTaken()) {
- Assert1(!BlockAddress::get(Entry)->isConstantUsed(),
+ Assert1(!BlockAddress::lookup(Entry)->isConstantUsed(),
"blockaddress may not be used with the entry block!", Entry);
}
}
// Verify call attributes.
VerifyFunctionAttrs(FTy, Attrs, I);
+ // Conservatively check the inalloca argument.
+ // We have a bug if we can find that there is an underlying alloca without
+ // inalloca.
+ if (CS.hasInAllocaArgument()) {
+ Value *InAllocaArg = CS.getArgument(FTy->getNumParams() - 1);
+ if (auto AI = dyn_cast<AllocaInst>(InAllocaArg->stripInBoundsOffsets()))
+ Assert2(AI->isUsedWithInAlloca(),
+ "inalloca argument for call has mismatched alloca", AI, I);
+ }
+
if (FTy->isVarArg()) {
// FIXME? is 'nest' even legal here?
bool SawNest = false;
}
// Verify that there's no metadata unless it's a direct call to an intrinsic.
- if (CS.getCalledFunction() == 0 ||
+ if (CS.getCalledFunction() == nullptr ||
!CS.getCalledFunction()->getName().startswith("llvm.")) {
for (FunctionType::param_iterator PI = FTy->param_begin(),
PE = FTy->param_end(); PI != PE; ++PI)
visitInstruction(*I);
}
+/// Two types are "congruent" if they are identical, or if they are both pointer
+/// types with different pointee types and the same address space.
+static bool isTypeCongruent(Type *L, Type *R) {
+ if (L == R)
+ return true;
+ PointerType *PL = dyn_cast<PointerType>(L);
+ PointerType *PR = dyn_cast<PointerType>(R);
+ if (!PL || !PR)
+ return false;
+ return PL->getAddressSpace() == PR->getAddressSpace();
+}
+
+void Verifier::verifyMustTailCall(CallInst &CI) {
+ Assert1(!CI.isInlineAsm(), "cannot use musttail call with inline asm", &CI);
+
+ // - The caller and callee prototypes must match. Pointer types of
+ // parameters or return types may differ in pointee type, but not
+ // address space.
+ Function *F = CI.getParent()->getParent();
+ auto GetFnTy = [](Value *V) {
+ return cast<FunctionType>(
+ cast<PointerType>(V->getType())->getElementType());
+ };
+ FunctionType *CallerTy = GetFnTy(F);
+ FunctionType *CalleeTy = GetFnTy(CI.getCalledValue());
+ Assert1(CallerTy->getNumParams() == CalleeTy->getNumParams(),
+ "cannot guarantee tail call due to mismatched parameter counts", &CI);
+ Assert1(CallerTy->isVarArg() == CalleeTy->isVarArg(),
+ "cannot guarantee tail call due to mismatched varargs", &CI);
+ Assert1(isTypeCongruent(CallerTy->getReturnType(), CalleeTy->getReturnType()),
+ "cannot guarantee tail call due to mismatched return types", &CI);
+ for (int I = 0, E = CallerTy->getNumParams(); I != E; ++I) {
+ Assert1(
+ isTypeCongruent(CallerTy->getParamType(I), CalleeTy->getParamType(I)),
+ "cannot guarantee tail call due to mismatched parameter types", &CI);
+ }
+
+ // - The calling conventions of the caller and callee must match.
+ Assert1(F->getCallingConv() == CI.getCallingConv(),
+ "cannot guarantee tail call due to mismatched calling conv", &CI);
+
+ // - All ABI-impacting function attributes, such as sret, byval, inreg,
+ // returned, and inalloca, must match.
+ static const Attribute::AttrKind ABIAttrs[] = {
+ Attribute::Alignment, Attribute::StructRet, Attribute::ByVal,
+ Attribute::InAlloca, Attribute::InReg, Attribute::Returned};
+ AttributeSet CallerAttrs = F->getAttributes();
+ AttributeSet CalleeAttrs = CI.getAttributes();
+ for (int I = 0, E = CallerTy->getNumParams(); I != E; ++I) {
+ AttrBuilder CallerABIAttrs;
+ AttrBuilder CalleeABIAttrs;
+ for (auto AK : ABIAttrs) {
+ if (CallerAttrs.hasAttribute(I + 1, AK))
+ CallerABIAttrs.addAttribute(AK);
+ if (CalleeAttrs.hasAttribute(I + 1, AK))
+ CalleeABIAttrs.addAttribute(AK);
+ }
+ Assert2(CallerABIAttrs == CalleeABIAttrs,
+ "cannot guarantee tail call due to mismatched ABI impacting "
+ "function attributes", &CI, CI.getOperand(I));
+ }
+
+ // - The call must immediately precede a :ref:`ret <i_ret>` instruction,
+ // or a pointer bitcast followed by a ret instruction.
+ // - The ret instruction must return the (possibly bitcasted) value
+ // produced by the call or void.
+ Value *RetVal = &CI;
+ Instruction *Next = CI.getNextNode();
+
+ // Handle the optional bitcast.
+ if (BitCastInst *BI = dyn_cast_or_null<BitCastInst>(Next)) {
+ Assert1(BI->getOperand(0) == RetVal,
+ "bitcast following musttail call must use the call", BI);
+ RetVal = BI;
+ Next = BI->getNextNode();
+ }
+
+ // Check the return.
+ ReturnInst *Ret = dyn_cast_or_null<ReturnInst>(Next);
+ Assert1(Ret, "musttail call must be precede a ret with an optional bitcast",
+ &CI);
+ Assert1(!Ret->getReturnValue() || Ret->getReturnValue() == RetVal,
+ "musttail call result must be returned", Ret);
+}
+
void Verifier::visitCallInst(CallInst &CI) {
VerifyCallSite(&CI);
+ if (CI.isMustTailCall())
+ verifyMustTailCall(CI);
+
if (Function *F = CI.getCalledFunction())
if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
visitIntrinsicFunctionCall(ID, CI);
"Atomic load must specify explicit alignment", &LI);
if (!ElTy->isPointerTy()) {
Assert2(ElTy->isIntegerTy(),
- "atomic store operand must have integer type!",
+ "atomic load operand must have integer type!",
&LI, ElTy);
unsigned Size = ElTy->getPrimitiveSizeInBits();
Assert2(Size >= 8 && !(Size & (Size - 1)),
- "atomic store operand must be power-of-two byte-sized integer",
+ "atomic load operand must be power-of-two byte-sized integer",
&LI, ElTy);
}
} else {
}
void Verifier::visitAtomicCmpXchgInst(AtomicCmpXchgInst &CXI) {
- Assert1(CXI.getOrdering() != NotAtomic,
+
+ // FIXME: more conditions???
+ Assert1(CXI.getSuccessOrdering() != NotAtomic,
+ "cmpxchg instructions must be atomic.", &CXI);
+ Assert1(CXI.getFailureOrdering() != NotAtomic,
"cmpxchg instructions must be atomic.", &CXI);
- Assert1(CXI.getOrdering() != Unordered,
+ Assert1(CXI.getSuccessOrdering() != Unordered,
"cmpxchg instructions cannot be unordered.", &CXI);
+ Assert1(CXI.getFailureOrdering() != Unordered,
+ "cmpxchg instructions cannot be unordered.", &CXI);
+ Assert1(CXI.getSuccessOrdering() >= CXI.getFailureOrdering(),
+ "cmpxchg instructions be at least as constrained on success as fail",
+ &CXI);
+ Assert1(CXI.getFailureOrdering() != Release &&
+ CXI.getFailureOrdering() != AcquireRelease,
+ "cmpxchg failure ordering cannot include release semantics", &CXI);
+
PointerType *PTy = dyn_cast<PointerType>(CXI.getOperand(0)->getType());
Assert1(PTy, "First cmpxchg operand must be a pointer.", &CXI);
Type *ElTy = PTy->getElementType();
Assert1(BB, "Instruction not embedded in basic block!", &I);
if (!isa<PHINode>(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 || !DT.isReachableFromEntry(BB),
+ for (User *U : I.users()) {
+ Assert1(U != (User*)&I || !DT.isReachableFromEntry(BB),
"Only PHI nodes may reference their own value!", &I);
+ }
}
// Check that void typed values don't have names
// 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) {
- if (Instruction *Used = dyn_cast<Instruction>(*UI))
- Assert2(Used->getParent() != 0, "Instruction referencing instruction not"
- " embedded in a basic block!", &I, Used);
+ for (Use &U : I.uses()) {
+ if (Instruction *Used = dyn_cast<Instruction>(U.getUser()))
+ Assert2(Used->getParent() != nullptr, "Instruction referencing"
+ " instruction not embedded in a basic block!", &I, Used);
else {
- CheckFailed("Use of instruction is not an instruction!", *UI);
+ CheckFailed("Use of instruction is not an instruction!", U);
return;
}
}
for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
- Assert1(I.getOperand(i) != 0, "Instruction has null operand!", &I);
+ Assert1(I.getOperand(i) != nullptr, "Instruction has null operand!", &I);
// Check to make sure that only first-class-values are operands to
// instructions.
MDNode *MD = I.getMetadata(LLVMContext::MD_range);
Assert1(!MD || isa<LoadInst>(I), "Ranges are only for loads!", &I);
- if (!DisableDebugInfoVerifier) {
- MD = I.getMetadata(LLVMContext::MD_dbg);
- Finder.processLocation(*M, DILocation(MD));
- }
-
InstsInThisBlock.insert(&I);
}
case IITDescriptor::Integer: return !Ty->isIntegerTy(D.Integer_Width);
case IITDescriptor::Vector: {
VectorType *VT = dyn_cast<VectorType>(Ty);
- return VT == 0 || VT->getNumElements() != D.Vector_Width ||
+ return !VT || VT->getNumElements() != D.Vector_Width ||
VerifyIntrinsicType(VT->getElementType(), Infos, ArgTys);
}
case IITDescriptor::Pointer: {
PointerType *PT = dyn_cast<PointerType>(Ty);
- return PT == 0 || PT->getAddressSpace() != D.Pointer_AddressSpace ||
+ return !PT || PT->getAddressSpace() != D.Pointer_AddressSpace ||
VerifyIntrinsicType(PT->getElementType(), Infos, ArgTys);
}
case IITDescriptor::Struct: {
StructType *ST = dyn_cast<StructType>(Ty);
- if (ST == 0 || ST->getNumElements() != D.Struct_NumElements)
+ if (!ST || ST->getNumElements() != D.Struct_NumElements)
return true;
for (unsigned i = 0, e = D.Struct_NumElements; i != e; ++i)
}
llvm_unreachable("all argument kinds not covered");
- case IITDescriptor::ExtendVecArgument:
+ case IITDescriptor::ExtendArgument: {
// This may only be used when referring to a previous vector argument.
- return D.getArgumentNumber() >= ArgTys.size() ||
- !isa<VectorType>(ArgTys[D.getArgumentNumber()]) ||
- VectorType::getExtendedElementVectorType(
- cast<VectorType>(ArgTys[D.getArgumentNumber()])) != Ty;
+ if (D.getArgumentNumber() >= ArgTys.size())
+ return true;
+
+ Type *NewTy = ArgTys[D.getArgumentNumber()];
+ if (VectorType *VTy = dyn_cast<VectorType>(NewTy))
+ NewTy = VectorType::getExtendedElementVectorType(VTy);
+ else if (IntegerType *ITy = dyn_cast<IntegerType>(NewTy))
+ NewTy = IntegerType::get(ITy->getContext(), 2 * ITy->getBitWidth());
+ else
+ return true;
+
+ return Ty != NewTy;
+ }
+ case IITDescriptor::TruncArgument: {
+ // This may only be used when referring to a previous vector argument.
+ if (D.getArgumentNumber() >= ArgTys.size())
+ return true;
+
+ Type *NewTy = ArgTys[D.getArgumentNumber()];
+ if (VectorType *VTy = dyn_cast<VectorType>(NewTy))
+ NewTy = VectorType::getTruncatedElementVectorType(VTy);
+ else if (IntegerType *ITy = dyn_cast<IntegerType>(NewTy))
+ NewTy = IntegerType::get(ITy->getContext(), ITy->getBitWidth() / 2);
+ else
+ return true;
- case IITDescriptor::TruncVecArgument:
+ return Ty != NewTy;
+ }
+ case IITDescriptor::HalfVecArgument:
// This may only be used when referring to a previous vector argument.
return D.getArgumentNumber() >= ArgTys.size() ||
!isa<VectorType>(ArgTys[D.getArgumentNumber()]) ||
- VectorType::getTruncatedElementVectorType(
+ VectorType::getHalfElementsVectorType(
cast<VectorType>(ArgTys[D.getArgumentNumber()])) != Ty;
}
llvm_unreachable("unhandled");
// know they are legal for the intrinsic!) get the intrinsic name through the
// usual means. This allows us to verify the mangling of argument types into
// the name.
- Assert1(Intrinsic::getName(ID, ArgTys) == IF->getName(),
- "Intrinsic name not mangled correctly for type arguments!", IF);
+ const std::string ExpectedName = Intrinsic::getName(ID, ArgTys);
+ Assert1(ExpectedName == IF->getName(),
+ "Intrinsic name not mangled correctly for type arguments! "
+ "Should be: " + ExpectedName, IF);
// If the intrinsic takes MDNode arguments, verify that they are either global
// or are local to *this* function.
MDNode *MD = cast<MDNode>(CI.getArgOperand(0));
Assert1(MD->getNumOperands() == 1,
"invalid llvm.dbg.declare intrinsic call 2", &CI);
- if (!DisableDebugInfoVerifier)
- Finder.processDeclare(*M, cast<DbgDeclareInst>(&CI));
} break;
- case Intrinsic::dbg_value: { //llvm.dbg.value
- if (!DisableDebugInfoVerifier) {
- Assert1(CI.getArgOperand(0) && isa<MDNode>(CI.getArgOperand(0)),
- "invalid llvm.dbg.value intrinsic call 1", &CI);
- Finder.processValue(*M, cast<DbgValueInst>(&CI));
- }
- break;
- }
case Intrinsic::memcpy:
case Intrinsic::memmove:
case Intrinsic::memset:
}
}
-void Verifier::verifyDebugInfo() {
+void DebugInfoVerifier::verifyDebugInfo() {
+ if (!VerifyDebugInfo)
+ return;
+
+ DebugInfoFinder Finder;
+ Finder.processModule(*M);
+ processInstructions(Finder);
+
// Verify Debug Info.
- if (!DisableDebugInfoVerifier) {
- for (DebugInfoFinder::iterator I = Finder.compile_unit_begin(),
- E = Finder.compile_unit_end(); I != E; ++I)
- Assert1(DICompileUnit(*I).Verify(), "DICompileUnit does not Verify!", *I);
- for (DebugInfoFinder::iterator I = Finder.subprogram_begin(),
- E = Finder.subprogram_end(); I != E; ++I)
- Assert1(DISubprogram(*I).Verify(), "DISubprogram does not Verify!", *I);
- for (DebugInfoFinder::iterator I = Finder.global_variable_begin(),
- E = Finder.global_variable_end(); I != E; ++I)
- Assert1(DIGlobalVariable(*I).Verify(),
- "DIGlobalVariable does not Verify!", *I);
- for (DebugInfoFinder::iterator I = Finder.type_begin(),
- E = Finder.type_end(); I != E; ++I)
- Assert1(DIType(*I).Verify(), "DIType does not Verify!", *I);
- for (DebugInfoFinder::iterator I = Finder.scope_begin(),
- E = Finder.scope_end(); I != E; ++I)
- Assert1(DIScope(*I).Verify(), "DIScope does not Verify!", *I);
+ //
+ // NOTE: The loud braces are necessary for MSVC compatibility.
+ for (DICompileUnit CU : Finder.compile_units()) {
+ Assert1(CU.Verify(), "DICompileUnit does not Verify!", CU);
+ }
+ for (DISubprogram S : Finder.subprograms()) {
+ Assert1(S.Verify(), "DISubprogram does not Verify!", S);
+ }
+ for (DIGlobalVariable GV : Finder.global_variables()) {
+ Assert1(GV.Verify(), "DIGlobalVariable does not Verify!", GV);
+ }
+ for (DIType T : Finder.types()) {
+ Assert1(T.Verify(), "DIType does not Verify!", T);
+ }
+ for (DIScope S : Finder.scopes()) {
+ Assert1(S.Verify(), "DIScope does not Verify!", S);
}
}
+void DebugInfoVerifier::processInstructions(DebugInfoFinder &Finder) {
+ for (const Function &F : *M)
+ for (auto I = inst_begin(&F), E = inst_end(&F); I != E; ++I) {
+ if (MDNode *MD = I->getMetadata(LLVMContext::MD_dbg))
+ Finder.processLocation(*M, DILocation(MD));
+ if (const CallInst *CI = dyn_cast<CallInst>(&*I))
+ processCallInst(Finder, *CI);
+ }
+}
+
+void DebugInfoVerifier::processCallInst(DebugInfoFinder &Finder,
+ const CallInst &CI) {
+ if (Function *F = CI.getCalledFunction())
+ if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
+ switch (ID) {
+ case Intrinsic::dbg_declare:
+ Finder.processDeclare(*M, cast<DbgDeclareInst>(&CI));
+ break;
+ case Intrinsic::dbg_value:
+ Finder.processValue(*M, cast<DbgValueInst>(&CI));
+ break;
+ default:
+ break;
+ }
+}
+
//===----------------------------------------------------------------------===//
// Implement the public interfaces to this file...
//===----------------------------------------------------------------------===//
-FunctionPass *llvm::createVerifierPass(VerifierFailureAction action) {
- return new Verifier(action);
-}
-
-bool llvm::verifyFunction(const Function &f, VerifierFailureAction action) {
+bool llvm::verifyFunction(const Function &f, raw_ostream *OS) {
Function &F = const_cast<Function &>(f);
assert(!F.isDeclaration() && "Cannot verify external functions");
- FunctionPassManager FPM(F.getParent());
- Verifier *V = new Verifier(action);
- FPM.add(V);
- FPM.doInitialization();
- FPM.run(F);
- return V->Broken;
+ raw_null_ostream NullStr;
+ Verifier V(OS ? *OS : NullStr);
+
+ // Note that this function's return value is inverted from what you would
+ // expect of a function called "verify".
+ return !V.verify(F);
+}
+
+bool llvm::verifyModule(const Module &M, raw_ostream *OS) {
+ raw_null_ostream NullStr;
+ Verifier V(OS ? *OS : NullStr);
+
+ bool Broken = false;
+ for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I)
+ if (!I->isDeclaration())
+ Broken |= !V.verify(*I);
+
+ // Note that this function's return value is inverted from what you would
+ // expect of a function called "verify".
+ DebugInfoVerifier DIV(OS ? *OS : NullStr);
+ return !V.verify(M) || !DIV.verify(M) || Broken;
+}
+
+namespace {
+struct VerifierLegacyPass : public FunctionPass {
+ static char ID;
+
+ Verifier V;
+ bool FatalErrors;
+
+ VerifierLegacyPass() : FunctionPass(ID), FatalErrors(true) {
+ initializeVerifierLegacyPassPass(*PassRegistry::getPassRegistry());
+ }
+ explicit VerifierLegacyPass(bool FatalErrors)
+ : FunctionPass(ID), V(dbgs()), FatalErrors(FatalErrors) {
+ initializeVerifierLegacyPassPass(*PassRegistry::getPassRegistry());
+ }
+
+ bool runOnFunction(Function &F) override {
+ if (!V.verify(F) && FatalErrors)
+ report_fatal_error("Broken function found, compilation aborted!");
+
+ return false;
+ }
+
+ bool doFinalization(Module &M) override {
+ if (!V.verify(M) && FatalErrors)
+ report_fatal_error("Broken module found, compilation aborted!");
+
+ return false;
+ }
+
+ void getAnalysisUsage(AnalysisUsage &AU) const override {
+ AU.setPreservesAll();
+ }
+};
+struct DebugInfoVerifierLegacyPass : public ModulePass {
+ static char ID;
+
+ DebugInfoVerifier V;
+ bool FatalErrors;
+
+ DebugInfoVerifierLegacyPass() : ModulePass(ID), FatalErrors(true) {
+ initializeDebugInfoVerifierLegacyPassPass(*PassRegistry::getPassRegistry());
+ }
+ explicit DebugInfoVerifierLegacyPass(bool FatalErrors)
+ : ModulePass(ID), V(dbgs()), FatalErrors(FatalErrors) {
+ initializeDebugInfoVerifierLegacyPassPass(*PassRegistry::getPassRegistry());
+ }
+
+ bool runOnModule(Module &M) override {
+ if (!V.verify(M) && FatalErrors)
+ report_fatal_error("Broken debug info found, compilation aborted!");
+
+ return false;
+ }
+
+ void getAnalysisUsage(AnalysisUsage &AU) const override {
+ AU.setPreservesAll();
+ }
+};
+}
+
+char VerifierLegacyPass::ID = 0;
+INITIALIZE_PASS(VerifierLegacyPass, "verify", "Module Verifier", false, false)
+
+char DebugInfoVerifierLegacyPass::ID = 0;
+INITIALIZE_PASS(DebugInfoVerifierLegacyPass, "verify-di", "Debug Info Verifier",
+ false, false)
+
+FunctionPass *llvm::createVerifierPass(bool FatalErrors) {
+ return new VerifierLegacyPass(FatalErrors);
+}
+
+ModulePass *llvm::createDebugInfoVerifierPass(bool FatalErrors) {
+ return new DebugInfoVerifierLegacyPass(FatalErrors);
+}
+
+PreservedAnalyses VerifierPass::run(Module *M) {
+ if (verifyModule(*M, &dbgs()) && FatalErrors)
+ report_fatal_error("Broken module found, compilation aborted!");
+
+ return PreservedAnalyses::all();
}
-bool llvm::verifyModule(const Module &M, VerifierFailureAction action,
- std::string *ErrorInfo) {
- PassManager PM;
- Verifier *V = new Verifier(action);
- PM.add(V);
- PM.run(const_cast<Module &>(M));
+PreservedAnalyses VerifierPass::run(Function *F) {
+ if (verifyFunction(*F, &dbgs()) && FatalErrors)
+ report_fatal_error("Broken function found, compilation aborted!");
- if (ErrorInfo && V->Broken)
- *ErrorInfo = V->MessagesStr.str();
- return V->Broken;
+ return PreservedAnalyses::all();
}
projects / oota-llvm.git / blobdiff