//===-- 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
#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/ParameterAttributes.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/Support/Streams.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/STLExtras.h"
+#include "llvm/Support/Compiler.h"
#include <algorithm>
-#include <iostream>
#include <sstream>
+#include <cstdarg>
using namespace llvm;
namespace { // Anonymous namespace for class
- struct Verifier : public FunctionPass, InstVisitor<Verifier> {
+ struct VISIBILITY_HIDDEN
+ Verifier : public FunctionPass, InstVisitor<Verifier> {
+ static char ID; // Pass ID, replacement for typeid
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
- DominatorSet *DS; // Dominator set, caution can be null!
+ DominatorTree *DT; // Dominator Tree, 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<Instruction*> InstsInThisBlock;
+ SmallPtrSet<Instruction*, 16> InstsInThisBlock;
- Verifier()
- : Broken(false), RealPass(true), action(AbortProcessAction),
- DS(0), msgs( std::ios_base::app | std::ios_base::out ) {}
+ Verifier()
+ : FunctionPass((intptr_t)&ID),
+ Broken(false), RealPass(true), action(AbortProcessAction),
+ DT(0), msgs( std::ios::app | std::ios::out ) {}
Verifier( VerifierFailureAction ctn )
- : Broken(false), RealPass(true), action(ctn), DS(0),
- msgs( std::ios_base::app | std::ios_base::out ) {}
- Verifier(bool AB )
- : Broken(false), RealPass(true),
- action( AB ? AbortProcessAction : PrintMessageAction), DS(0),
- msgs( std::ios_base::app | std::ios_base::out ) {}
- Verifier(DominatorSet &ds)
- : Broken(false), RealPass(false), action(PrintMessageAction),
- DS(&ds), msgs( std::ios_base::app | std::ios_base::out ) {}
+ : FunctionPass((intptr_t)&ID),
+ Broken(false), RealPass(true), action(ctn), DT(0),
+ msgs( std::ios::app | std::ios::out ) {}
+ Verifier(bool AB )
+ : FunctionPass((intptr_t)&ID),
+ Broken(false), RealPass(true),
+ action( AB ? AbortProcessAction : PrintMessageAction), DT(0),
+ msgs( std::ios::app | std::ios::out ) {}
+ Verifier(DominatorTree &dt)
+ : FunctionPass((intptr_t)&ID),
+ Broken(false), RealPass(false), action(PrintMessageAction),
+ DT(&dt), msgs( std::ios::app | std::ios::out ) {}
bool doInitialization(Module &M) {
Mod = &M;
- verifySymbolTable(M.getSymbolTable());
+ verifyTypeSymbolTable(M.getTypeSymbolTable());
// 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 abortIfBroken();
return false;
}
bool runOnFunction(Function &F) {
// Get dominator information if we are being run by PassManager
- if (RealPass) DS = &getAnalysis<DominatorSet>();
+ if (RealPass) DT = &getAnalysis<DominatorTree>();
+
+ Mod = F.getParent();
+
visit(F);
InstsInThisBlock.clear();
// 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 abortIfBroken();
return false;
}
visitGlobalValue(*I);
// Check to make sure function prototypes are okay.
- if (I->isExternal()) visitFunction(*I);
+ if (I->isDeclaration()) visitFunction(*I);
}
- for (Module::giterator I = M.gbegin(), E = M.gend(); I != E; ++I)
+ for (Module::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)
+ visitGlobalAlias(*I);
+
// If the module is broken, abort at this time.
- abortIfBroken();
- return false;
+ return abortIfBroken();
}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
if (RealPass)
- AU.addRequired<DominatorSet>();
+ AU.addRequired<DominatorTree>();
}
/// abortIfBroken - If the module is broken and we are supposed to abort on
/// this condition, do so.
///
- void abortIfBroken() {
- if (Broken)
- {
+ bool abortIfBroken() {
+ if (Broken) {
msgs << "Broken module found, ";
- switch (action)
- {
+ switch (action) {
case AbortProcessAction:
msgs << "compilation aborted!\n";
- std::cerr << msgs.str();
+ cerr << msgs.str();
abort();
- case ThrowExceptionAction:
- msgs << "verification terminated.\n";
- throw msgs.str();
case PrintMessageAction:
msgs << "verification continues.\n";
- std::cerr << msgs.str();
- break;
+ cerr << msgs.str();
+ return false;
case ReturnStatusAction:
- break;
+ msgs << "compilation terminated.\n";
+ return Broken;
}
}
+ return false;
}
// Verification methods...
- void verifySymbolTable(SymbolTable &ST);
+ void verifyTypeSymbolTable(TypeSymbolTable &ST);
void visitGlobalValue(GlobalValue &GV);
void visitGlobalVariable(GlobalVariable &GV);
+ void visitGlobalAlias(GlobalAlias &GA);
void visitFunction(Function &F);
void visitBasicBlock(BasicBlock &BB);
+ void visitTruncInst(TruncInst &I);
+ void visitZExtInst(ZExtInst &I);
+ void visitSExtInst(SExtInst &I);
+ void visitFPTruncInst(FPTruncInst &I);
+ void visitFPExtInst(FPExtInst &I);
+ void visitFPToUIInst(FPToUIInst &I);
+ void visitFPToSIInst(FPToSIInst &I);
+ void visitUIToFPInst(UIToFPInst &I);
+ void visitSIToFPInst(SIToFPInst &I);
+ void visitIntToPtrInst(IntToPtrInst &I);
+ void visitPtrToIntInst(PtrToIntInst &I);
+ void visitBitCastInst(BitCastInst &I);
void visitPHINode(PHINode &PN);
void visitBinaryOperator(BinaryOperator &B);
- void visitShiftInst(ShiftInst &SI);
- void visitVANextInst(VANextInst &VAN) { visitInstruction(VAN); }
+ void visitICmpInst(ICmpInst &IC);
+ void visitFCmpInst(FCmpInst &FC);
+ void visitExtractElementInst(ExtractElementInst &EI);
+ void visitInsertElementInst(InsertElementInst &EI);
+ void visitShuffleVectorInst(ShuffleVectorInst &EI);
void visitVAArgInst(VAArgInst &VAA) { visitInstruction(VAA); }
void visitCallInst(CallInst &CI);
void visitGetElementPtrInst(GetElementPtrInst &GEP);
void visitUserOp2(Instruction &I) { visitUserOp1(I); }
void visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI);
+ void VerifyIntrinsicPrototype(Intrinsic::ID ID, Function *F, ...);
void WriteValue(const Value *V) {
if (!V) return;
if (isa<Instruction>(V)) {
msgs << *V;
} else {
- WriteAsOperand (msgs, V, true, true, Mod);
+ WriteAsOperand(msgs, V, true, Mod);
msgs << "\n";
}
}
Broken = true;
}
- void CheckFailed( const std::string& Message, const Value* V1,
+ void CheckFailed( const std::string& Message, const Value* V1,
const Type* T2, const Value* V3 = 0 ) {
msgs << Message << "\n";
WriteValue(V1);
}
};
- RegisterOpt<Verifier> X("verify", "Module Verifier");
+ char Verifier::ID = 0;
+ RegisterPass<Verifier> X("verify", "Module Verifier");
} // End anonymous namespace
void Verifier::visitGlobalValue(GlobalValue &GV) {
- Assert1(!GV.isExternal() || GV.hasExternalLinkage(),
- "Global is external, but doesn't have external linkage!", &GV);
+ Assert1(!GV.isDeclaration() ||
+ GV.hasExternalLinkage() ||
+ GV.hasDLLImportLinkage() ||
+ GV.hasExternalWeakLinkage() ||
+ (isa<GlobalAlias>(GV) &&
+ (GV.hasInternalLinkage() || GV.hasWeakLinkage())),
+ "Global is external, but doesn't have external or dllimport or weak linkage!",
+ &GV);
+
+ Assert1(!GV.hasDLLImportLinkage() || GV.isDeclaration(),
+ "Global is marked as dllimport, but not external", &GV);
+
Assert1(!GV.hasAppendingLinkage() || isa<GlobalVariable>(GV),
"Only global variables can have appending linkage!", &GV);
}
void Verifier::visitGlobalVariable(GlobalVariable &GV) {
- if (GV.hasInitializer())
+ if (GV.hasInitializer())
Assert1(GV.getInitializer()->getType() == GV.getType()->getElementType(),
"Global variable initializer type does not match global "
"variable type!", &GV);
-
+
visitGlobalValue(GV);
}
+void Verifier::visitGlobalAlias(GlobalAlias &GA) {
+ Assert1(!GA.getName().empty(),
+ "Alias name cannot be empty!", &GA);
+ Assert1(GA.hasExternalLinkage() || GA.hasInternalLinkage() ||
+ GA.hasWeakLinkage(),
+ "Alias should have external or external weak linkage!", &GA);
+ Assert1(GA.getType() == GA.getAliasee()->getType(),
+ "Alias and aliasee types should match!", &GA);
+
+ if (!isa<GlobalValue>(GA.getAliasee())) {
+ const ConstantExpr *CE = dyn_cast<ConstantExpr>(GA.getAliasee());
+ Assert1(CE && CE->getOpcode() == Instruction::BitCast &&
+ isa<GlobalValue>(CE->getOperand(0)),
+ "Aliasee should be either GlobalValue or bitcast of GlobalValue",
+ &GA);
+ }
+
+ visitGlobalValue(GA);
+}
-// 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);
- }
+void Verifier::verifyTypeSymbolTable(TypeSymbolTable &ST) {
}
// visitFunction - Verify that a function is ok.
//
void Verifier::visitFunction(Function &F) {
- // Check function arguments...
+ // Check function arguments.
const FunctionType *FT = F.getFunctionType();
unsigned NumArgs = F.getArgumentList().size();
F.getReturnType() == Type::VoidTy,
"Functions cannot return aggregate values!", &F);
+ Assert1(!FT->isStructReturn() ||
+ (FT->getReturnType() == Type::VoidTy &&
+ FT->getNumParams() > 0 && isa<PointerType>(FT->getParamType(0))),
+ "Invalid struct-return function!", &F);
+
+ if (const ParamAttrsList *Attrs = FT->getParamAttrs()) {
+ unsigned Idx = 1;
+
+ Assert1(!Attrs->paramHasAttr(0, ParamAttr::ByVal),
+ "Attribute ByVal should not apply to functions!", &F);
+ Assert1(!Attrs->paramHasAttr(0, ParamAttr::StructRet),
+ "Attribute SRet should not apply to functions!", &F);
+ Assert1(!Attrs->paramHasAttr(0, ParamAttr::InReg),
+ "Attribute InReg should not apply to functions!", &F);
+
+ for (FunctionType::param_iterator I = FT->param_begin(),
+ E = FT->param_end(); I != E; ++I, ++Idx) {
+ if (Attrs->paramHasAttr(Idx, ParamAttr::ZExt) ||
+ Attrs->paramHasAttr(Idx, ParamAttr::SExt))
+ Assert1(FT->getParamType(Idx-1)->isInteger(),
+ "Attribute ZExt should only apply to Integer type!", &F);
+ if (Attrs->paramHasAttr(Idx, ParamAttr::NoAlias))
+ Assert1(isa<PointerType>(FT->getParamType(Idx-1)),
+ "Attribute NoAlias should only apply to Pointer type!", &F);
+ if (Attrs->paramHasAttr(Idx, ParamAttr::ByVal)) {
+ Assert1(isa<PointerType>(FT->getParamType(Idx-1)),
+ "Attribute ByVal should only apply to pointer to structs!", &F);
+
+ Assert1(!Attrs->paramHasAttr(Idx, ParamAttr::StructRet),
+ "Attributes ByVal and StructRet are incompatible!", &F);
+
+ const PointerType *Ty =
+ cast<PointerType>(FT->getParamType(Idx-1));
+ Assert1(isa<StructType>(Ty->getElementType()),
+ "Attribute ByVal should only apply to pointer to structs!", &F);
+ }
+
+ Assert1(!Attrs->paramHasAttr(Idx, ParamAttr::NoReturn),
+ "Attribute NoReturn should only be applied to function", &F);
+ Assert1(!Attrs->paramHasAttr(Idx, ParamAttr::NoUnwind),
+ "Attribute NoUnwind should only be applied to function", &F);
+ }
+ }
+
+ // Check that this function meets the restrictions on this calling convention.
+ switch (F.getCallingConv()) {
+ default:
+ break;
+ case CallingConv::C:
+ break;
+ case CallingConv::Fast:
+ case CallingConv::Cold:
+ case CallingConv::X86_FastCall:
+ Assert1(!F.isVarArg(),
+ "Varargs functions must have C calling conventions!", &F);
+ break;
+ }
+
// Check that the argument values match the function type for this function...
unsigned i = 0;
- for (Function::aiterator I = F.abegin(), E = F.aend(); I != E; ++I, ++i) {
+ 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(),
+ Assert1(I->getType()->isFirstClassType(),
"Functions cannot take aggregates as arguments by value!", I);
}
- if (!F.isExternal()) {
- verifySymbolTable(F.getSymbolTable());
-
+ if (!F.isDeclaration()) {
+ // Verify that this function (which has a body) is not named "llvm.*". It
+ // is not legal to define intrinsics.
+ if (F.getName().size() >= 5)
+ Assert1(F.getName().substr(0, 5) != "llvm.",
+ "llvm intrinsics cannot be defined!", &F);
+
// Check the entry node
BasicBlock *Entry = &F.getEntryBlock();
Assert1(pred_begin(Entry) == pred_end(Entry),
// Check constraints that this basic block imposes on all of the PHI nodes in
// it.
if (isa<PHINode>(BB.front())) {
- std::vector<BasicBlock*> Preds(pred_begin(&BB), pred_end(&BB));
+ SmallVector<BasicBlock*, 8> Preds(pred_begin(&BB), pred_end(&BB));
+ SmallVector<std::pair<BasicBlock*, Value*>, 8> Values;
std::sort(Preds.begin(), Preds.end());
- PHINode *PN;
+ PHINode *PN;
for (BasicBlock::iterator I = BB.begin(); (PN = dyn_cast<PHINode>(I));++I) {
// Ensure that PHI nodes have at least one entry!
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<std::pair<BasicBlock*, Value*> > Values;
+ Values.clear();
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
"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]);
+ Values[i].first, Preds[i]);
}
}
}
}
void Verifier::visitSelectInst(SelectInst &SI) {
- Assert1(SI.getCondition()->getType() == Type::BoolTy,
+ Assert1(SI.getCondition()->getType() == Type::Int1Ty,
"Select condition type must be bool!", &SI);
Assert1(SI.getTrueValue()->getType() == SI.getFalseValue()->getType(),
"Select values must have identical types!", &SI);
/// 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);
+ Assert1(0, "User-defined operators should not live outside of a pass!", &I);
+}
+
+void Verifier::visitTruncInst(TruncInst &I) {
+ // Get the source and destination types
+ const Type *SrcTy = I.getOperand(0)->getType();
+ const Type *DestTy = I.getType();
+
+ // Get the size of the types in bits, we'll need this later
+ unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
+ unsigned DestBitSize = DestTy->getPrimitiveSizeInBits();
+
+ Assert1(SrcTy->isInteger(), "Trunc only operates on integer", &I);
+ Assert1(DestTy->isInteger(), "Trunc only produces integer", &I);
+ Assert1(SrcBitSize > DestBitSize,"DestTy too big for Trunc", &I);
+
+ visitInstruction(I);
+}
+
+void Verifier::visitZExtInst(ZExtInst &I) {
+ // Get the source and destination types
+ const Type *SrcTy = I.getOperand(0)->getType();
+ const Type *DestTy = I.getType();
+
+ // Get the size of the types in bits, we'll need this later
+ Assert1(SrcTy->isInteger(), "ZExt only operates on integer", &I);
+ Assert1(DestTy->isInteger(), "ZExt only produces an integer", &I);
+ unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
+ unsigned DestBitSize = DestTy->getPrimitiveSizeInBits();
+
+ Assert1(SrcBitSize < DestBitSize,"Type too small for ZExt", &I);
+
+ visitInstruction(I);
+}
+
+void Verifier::visitSExtInst(SExtInst &I) {
+ // Get the source and destination types
+ const Type *SrcTy = I.getOperand(0)->getType();
+ const Type *DestTy = I.getType();
+
+ // Get the size of the types in bits, we'll need this later
+ unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
+ unsigned DestBitSize = DestTy->getPrimitiveSizeInBits();
+
+ Assert1(SrcTy->isInteger(), "SExt only operates on integer", &I);
+ Assert1(DestTy->isInteger(), "SExt only produces an integer", &I);
+ Assert1(SrcBitSize < DestBitSize,"Type too small for SExt", &I);
+
+ visitInstruction(I);
+}
+
+void Verifier::visitFPTruncInst(FPTruncInst &I) {
+ // Get the source and destination types
+ const Type *SrcTy = I.getOperand(0)->getType();
+ const Type *DestTy = I.getType();
+ // Get the size of the types in bits, we'll need this later
+ unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
+ unsigned DestBitSize = DestTy->getPrimitiveSizeInBits();
+
+ Assert1(SrcTy->isFloatingPoint(),"FPTrunc only operates on FP", &I);
+ Assert1(DestTy->isFloatingPoint(),"FPTrunc only produces an FP", &I);
+ Assert1(SrcBitSize > DestBitSize,"DestTy too big for FPTrunc", &I);
+
+ visitInstruction(I);
+}
+
+void Verifier::visitFPExtInst(FPExtInst &I) {
+ // Get the source and destination types
+ const Type *SrcTy = I.getOperand(0)->getType();
+ const Type *DestTy = I.getType();
+
+ // Get the size of the types in bits, we'll need this later
+ unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
+ unsigned DestBitSize = DestTy->getPrimitiveSizeInBits();
+
+ Assert1(SrcTy->isFloatingPoint(),"FPExt only operates on FP", &I);
+ Assert1(DestTy->isFloatingPoint(),"FPExt only produces an FP", &I);
+ Assert1(SrcBitSize < DestBitSize,"DestTy too small for FPExt", &I);
+
+ visitInstruction(I);
+}
+
+void Verifier::visitUIToFPInst(UIToFPInst &I) {
+ // Get the source and destination types
+ const Type *SrcTy = I.getOperand(0)->getType();
+ const Type *DestTy = I.getType();
+
+ Assert1(SrcTy->isInteger(),"UInt2FP source must be integral", &I);
+ Assert1(DestTy->isFloatingPoint(),"UInt2FP result must be FP", &I);
+
+ visitInstruction(I);
+}
+
+void Verifier::visitSIToFPInst(SIToFPInst &I) {
+ // Get the source and destination types
+ const Type *SrcTy = I.getOperand(0)->getType();
+ const Type *DestTy = I.getType();
+
+ Assert1(SrcTy->isInteger(),"SInt2FP source must be integral", &I);
+ Assert1(DestTy->isFloatingPoint(),"SInt2FP result must be FP", &I);
+
+ visitInstruction(I);
+}
+
+void Verifier::visitFPToUIInst(FPToUIInst &I) {
+ // Get the source and destination types
+ const Type *SrcTy = I.getOperand(0)->getType();
+ const Type *DestTy = I.getType();
+
+ Assert1(SrcTy->isFloatingPoint(),"FP2UInt source must be FP", &I);
+ Assert1(DestTy->isInteger(),"FP2UInt result must be integral", &I);
+
+ visitInstruction(I);
+}
+
+void Verifier::visitFPToSIInst(FPToSIInst &I) {
+ // Get the source and destination types
+ const Type *SrcTy = I.getOperand(0)->getType();
+ const Type *DestTy = I.getType();
+
+ Assert1(SrcTy->isFloatingPoint(),"FPToSI source must be FP", &I);
+ Assert1(DestTy->isInteger(),"FP2ToI result must be integral", &I);
+
+ visitInstruction(I);
+}
+
+void Verifier::visitPtrToIntInst(PtrToIntInst &I) {
+ // Get the source and destination types
+ const Type *SrcTy = I.getOperand(0)->getType();
+ const Type *DestTy = I.getType();
+
+ Assert1(isa<PointerType>(SrcTy), "PtrToInt source must be pointer", &I);
+ Assert1(DestTy->isInteger(), "PtrToInt result must be integral", &I);
+
+ visitInstruction(I);
+}
+
+void Verifier::visitIntToPtrInst(IntToPtrInst &I) {
+ // Get the source and destination types
+ const Type *SrcTy = I.getOperand(0)->getType();
+ const Type *DestTy = I.getType();
+
+ Assert1(SrcTy->isInteger(), "IntToPtr source must be an integral", &I);
+ Assert1(isa<PointerType>(DestTy), "IntToPtr result must be a pointer",&I);
+
+ visitInstruction(I);
+}
+
+void Verifier::visitBitCastInst(BitCastInst &I) {
+ // Get the source and destination types
+ const Type *SrcTy = I.getOperand(0)->getType();
+ const Type *DestTy = I.getType();
+
+ // Get the size of the types in bits, we'll need this later
+ unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
+ unsigned DestBitSize = DestTy->getPrimitiveSizeInBits();
+
+ // BitCast implies a no-op cast of type only. No bits change.
+ // However, you can't cast pointers to anything but pointers.
+ Assert1(isa<PointerType>(DestTy) == isa<PointerType>(DestTy),
+ "Bitcast requires both operands to be pointer or neither", &I);
+ Assert1(SrcBitSize == DestBitSize, "Bitcast requies types of same width", &I);
+
+ visitInstruction(I);
}
/// visitPHINode - Ensure that a PHI node is well formed.
// 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<PHINode>(PN.getPrev()),
+ Assert2(&PN == &PN.getParent()->front() ||
+ isa<PHINode>(--BasicBlock::iterator(&PN)),
"PHI nodes not grouped at top of basic block!",
&PN, PN.getParent());
Assert1(B.getOperand(0)->getType() == B.getOperand(1)->getType(),
"Both operands to a binary operator are not of the same type!", &B);
+ switch (B.getOpcode()) {
// 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(),
+ case Instruction::And:
+ case Instruction::Or:
+ case Instruction::Xor:
+ Assert1(B.getType()->isInteger() ||
+ (isa<VectorType>(B.getType()) &&
+ cast<VectorType>(B.getType())->getElementType()->isInteger()),
"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<SetCondInst>(B)) {
- // Check that setcc instructions return bool
- Assert1(B.getType() == Type::BoolTy,
- "setcc instructions must return boolean values!", &B);
- } else {
+ break;
+ case Instruction::Shl:
+ case Instruction::LShr:
+ case Instruction::AShr:
+ Assert1(B.getType()->isInteger(),
+ "Shift must return an integer result!", &B);
+ Assert1(B.getType() == B.getOperand(0)->getType(),
+ "Shift return type must be same as operands!", &B);
+ /* FALL THROUGH */
+ default:
// 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<PackedType>(B.getType()),
- "Arithmetic operators must have integer, fp, or packed type!", &B);
+ Assert1(B.getType()->isInteger() || B.getType()->isFloatingPoint() ||
+ isa<VectorType>(B.getType()),
+ "Arithmetic operators must have integer, fp, or vector type!", &B);
+ break;
}
-
+
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::visitICmpInst(ICmpInst& IC) {
+ // Check that the operands are the same type
+ const Type* Op0Ty = IC.getOperand(0)->getType();
+ const Type* Op1Ty = IC.getOperand(1)->getType();
+ Assert1(Op0Ty == Op1Ty,
+ "Both operands to ICmp instruction are not of the same type!", &IC);
+ // Check that the operands are the right type
+ Assert1(Op0Ty->isInteger() || isa<PointerType>(Op0Ty),
+ "Invalid operand types for ICmp instruction", &IC);
+ visitInstruction(IC);
+}
+
+void Verifier::visitFCmpInst(FCmpInst& FC) {
+ // Check that the operands are the same type
+ const Type* Op0Ty = FC.getOperand(0)->getType();
+ const Type* Op1Ty = FC.getOperand(1)->getType();
+ Assert1(Op0Ty == Op1Ty,
+ "Both operands to FCmp instruction are not of the same type!", &FC);
+ // Check that the operands are the right type
+ Assert1(Op0Ty->isFloatingPoint(),
+ "Invalid operand types for FCmp instruction", &FC);
+ visitInstruction(FC);
+}
+
+void Verifier::visitExtractElementInst(ExtractElementInst &EI) {
+ Assert1(ExtractElementInst::isValidOperands(EI.getOperand(0),
+ EI.getOperand(1)),
+ "Invalid extractelement operands!", &EI);
+ visitInstruction(EI);
+}
+
+void Verifier::visitInsertElementInst(InsertElementInst &IE) {
+ Assert1(InsertElementInst::isValidOperands(IE.getOperand(0),
+ IE.getOperand(1),
+ IE.getOperand(2)),
+ "Invalid insertelement operands!", &IE);
+ visitInstruction(IE);
+}
+
+void Verifier::visitShuffleVectorInst(ShuffleVectorInst &SV) {
+ Assert1(ShuffleVectorInst::isValidOperands(SV.getOperand(0), SV.getOperand(1),
+ SV.getOperand(2)),
+ "Invalid shufflevector operands!", &SV);
+ Assert1(SV.getType() == SV.getOperand(0)->getType(),
+ "Result of shufflevector must match first operand type!", &SV);
+
+ // Check to see if Mask is valid.
+ if (const ConstantVector *MV = dyn_cast<ConstantVector>(SV.getOperand(2))) {
+ for (unsigned i = 0, e = MV->getNumOperands(); i != e; ++i) {
+ Assert1(isa<ConstantInt>(MV->getOperand(i)) ||
+ isa<UndefValue>(MV->getOperand(i)),
+ "Invalid shufflevector shuffle mask!", &SV);
+ }
+ } else {
+ Assert1(isa<UndefValue>(SV.getOperand(2)) ||
+ isa<ConstantAggregateZero>(SV.getOperand(2)),
+ "Invalid shufflevector shuffle mask!", &SV);
+ }
+
+ visitInstruction(SV);
}
void Verifier::visitGetElementPtrInst(GetElementPtrInst &GEP) {
+ SmallVector<Value*, 16> Idxs(GEP.idx_begin(), GEP.idx_end());
const Type *ElTy =
GetElementPtrInst::getIndexedType(GEP.getOperand(0)->getType(),
- std::vector<Value*>(GEP.idx_begin(), GEP.idx_end()), true);
+ &Idxs[0], Idxs.size(), true);
Assert1(ElTy, "Invalid indices for GEP pointer type!", &GEP);
- Assert2(PointerType::get(ElTy) == GEP.getType(),
+ Assert2(isa<PointerType>(GEP.getType()) &&
+ cast<PointerType>(GEP.getType())->getElementType() == ElTy,
"GEP is not of right type for indices!", &GEP, ElTy);
visitInstruction(GEP);
}
/// verifyInstruction - Verify that an instruction is well formed.
///
void Verifier::visitInstruction(Instruction &I) {
- BasicBlock *BB = I.getParent();
+ BasicBlock *BB = I.getParent();
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 ||
- !DS->dominates(&BB->getParent()->getEntryBlock(), BB),
+ !DT->dominates(&BB->getParent()->getEntryBlock(), BB),
"Only PHI nodes may reference their own value!", &I);
}
}
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);
+
+ // Check to make sure that only first-class-values are operands to
+ // instructions.
+ Assert1(I.getOperand(i)->getType()->isFirstClassType(),
+ "Instruction operands must be first-class values!", &I);
+
if (Function *F = dyn_cast<Function>(I.getOperand(i))) {
+ // Check to make sure that the "address of" an intrinsic function is never
+ // taken.
Assert1(!F->isIntrinsic() || (i == 0 && isa<CallInst>(I)),
"Cannot take the address of an intrinsic!", &I);
+ Assert1(F->getParent() == Mod, "Referencing function in another module!",
+ &I);
} else if (BasicBlock *OpBB = dyn_cast<BasicBlock>(I.getOperand(i))) {
Assert1(OpBB->getParent() == BB->getParent(),
"Referring to a basic block in another function!", &I);
} else if (Argument *OpArg = dyn_cast<Argument>(I.getOperand(i))) {
Assert1(OpArg->getParent() == BB->getParent(),
"Referring to an argument in another function!", &I);
+ } else if (GlobalValue *GV = dyn_cast<GlobalValue>(I.getOperand(i))) {
+ Assert1(GV->getParent() == Mod, "Referencing global in another module!",
+ &I);
} else if (Instruction *Op = dyn_cast<Instruction>(I.getOperand(i))) {
BasicBlock *OpBlock = Op->getParent();
if (!isa<PHINode>(I)) {
// Invoke results are only usable in the normal destination, not in the
// exceptional destination.
- if (InvokeInst *II = dyn_cast<InvokeInst>(Op))
+ if (InvokeInst *II = dyn_cast<InvokeInst>(Op)) {
OpBlock = II->getNormalDest();
- else if (OpBlock == BB) {
+
+ Assert2(OpBlock != II->getUnwindDest(),
+ "No uses of invoke possible due to dominance structure!",
+ Op, II);
+
+ // If the normal successor of an invoke instruction has multiple
+ // predecessors, then the normal edge from the invoke is critical, so
+ // the invoke value can only be live if the destination block
+ // dominates all of it's predecessors (other than the invoke) or if
+ // the invoke value is only used by a phi in the successor.
+ if (!OpBlock->getSinglePredecessor() &&
+ DT->dominates(&BB->getParent()->getEntryBlock(), BB)) {
+ // The first case we allow is if the use is a PHI operand in the
+ // normal block, and if that PHI operand corresponds to the invoke's
+ // block.
+ bool Bad = true;
+ if (PHINode *PN = dyn_cast<PHINode>(&I))
+ if (PN->getParent() == OpBlock &&
+ PN->getIncomingBlock(i/2) == Op->getParent())
+ Bad = false;
+
+ // If it is used by something non-phi, then the other case is that
+ // 'OpBlock' dominates all of its predecessors other than the
+ // invoke. In this case, the invoke value can still be used.
+ if (Bad) {
+ Bad = false;
+ for (pred_iterator PI = pred_begin(OpBlock),
+ E = pred_end(OpBlock); PI != E; ++PI) {
+ if (*PI != II->getParent() && !DT->dominates(OpBlock, *PI)) {
+ Bad = true;
+ break;
+ }
+ }
+ }
+ Assert2(!Bad,
+ "Invoke value defined on critical edge but not dead!", &I,
+ Op);
+ }
+ } 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) ||
- !DS->dominates(&BB->getParent()->getEntryBlock(), BB),
+ !DT->dominates(&BB->getParent()->getEntryBlock(), BB),
"Instruction does not dominate all uses!", Op, &I);
}
// Definition must dominate use unless use is unreachable!
- Assert2(DS->dominates(OpBlock, BB) ||
- !DS->dominates(&BB->getParent()->getEntryBlock(), BB),
+ Assert2(DT->dominates(OpBlock, BB) ||
+ !DT->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<BasicBlock>(I.getOperand(i+1));
- Assert2(DS->dominates(OpBlock, PredBB) ||
- !DS->dominates(&BB->getParent()->getEntryBlock(), PredBB),
+ Assert2(DT->dominates(OpBlock, PredBB) ||
+ !DT->dominates(&BB->getParent()->getEntryBlock(), PredBB),
"Instruction does not dominate all uses!", Op, &I);
}
+ } else if (isa<InlineAsm>(I.getOperand(i))) {
+ Assert1(i == 0 && isa<CallInst>(I),
+ "Cannot take the address of an inline asm!", &I);
}
}
InstsInThisBlock.insert(&I);
///
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 = 0;
- break;
- case Intrinsic::vaend: NumArgs = 1; break;
- case Intrinsic::vacopy: NumArgs = 1; break;
-
- case Intrinsic::returnaddress:
- case Intrinsic::frameaddress:
- Assert1(isa<PointerType>(FT->getReturnType()),
- "llvm.(frame|return)address must return pointers", IF);
- Assert1(FT->getNumParams() == 1 && isa<ConstantInt>(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;
+ Assert1(IF->isDeclaration(), "Intrinsic functions should never be defined!",
+ IF);
+
+#define GET_INTRINSIC_VERIFIER
+#include "llvm/Intrinsics.gen"
+#undef GET_INTRINSIC_VERIFIER
+}
- 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<PointerType>(FT->getParamType(1)),
- "Second argument not a pointer!", IF);
- NumArgs = 2;
- break;
+/// VerifyIntrinsicPrototype - TableGen emits calls to this function into
+/// Intrinsics.gen. This implements a little state machine that verifies the
+/// prototype of intrinsics.
+void Verifier::VerifyIntrinsicPrototype(Intrinsic::ID ID, Function *F, ...) {
+ va_list VA;
+ va_start(VA, F);
+
+ const FunctionType *FTy = F->getFunctionType();
+
+ // For overloaded intrinsics, the Suffix of the function name must match the
+ // types of the arguments. This variable keeps track of the expected
+ // suffix, to be checked at the end.
+ std::string Suffix;
- 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;
+ // Note that "arg#0" is the return type.
+ for (unsigned ArgNo = 0; 1; ++ArgNo) {
+ int TypeID = va_arg(VA, int);
- case Intrinsic::readio: {
- const PointerType *ParamType = dyn_cast<PointerType>(FT->getParamType(0));
- const Type *ReturnType = FT->getReturnType();
+ if (TypeID == -2) {
+ break;
+ }
- 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;
- }
+ if (TypeID == -1) {
+ if (ArgNo != FTy->getNumParams()+1)
+ CheckFailed("Intrinsic prototype has too many arguments!", F);
+ break;
+ }
- case Intrinsic::isunordered:
- 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)->isFloatingPoint(),
- "Argument is not a floating point type!", IF);
- NumArgs = 2;
- break;
+ if (ArgNo == FTy->getNumParams()+1) {
+ CheckFailed("Intrinsic prototype has too few arguments!", F);
+ break;
+ }
+
+ const Type *Ty;
+ if (ArgNo == 0)
+ Ty = FTy->getReturnType();
+ else
+ Ty = FTy->getParamType(ArgNo-1);
+
+ if (TypeID != Ty->getTypeID()) {
+ if (ArgNo == 0)
+ CheckFailed("Intrinsic prototype has incorrect result type!", F);
+ else
+ CheckFailed("Intrinsic parameter #" + utostr(ArgNo-1) + " is wrong!",F);
+ 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<Constant>(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: NumArgs = 4; break;
- case Intrinsic::memmove: NumArgs = 4; break;
- case Intrinsic::memset: NumArgs = 4; break;
-
- case Intrinsic::not_intrinsic:
- assert(0 && "Invalid intrinsic!"); NumArgs = 0; break;
+ if (TypeID == Type::IntegerTyID) {
+ unsigned ExpectedBits = (unsigned) va_arg(VA, int);
+ unsigned GotBits = cast<IntegerType>(Ty)->getBitWidth();
+ if (ExpectedBits == 0) {
+ Suffix += ".i" + utostr(GotBits);
+ } else if (GotBits != ExpectedBits) {
+ std::string bitmsg = " Expected " + utostr(ExpectedBits) + " but got "+
+ utostr(GotBits) + " bits.";
+ if (ArgNo == 0)
+ CheckFailed("Intrinsic prototype has incorrect integer result width!"
+ + bitmsg, F);
+ else
+ CheckFailed("Intrinsic parameter #" + utostr(ArgNo-1) + " has "
+ "incorrect integer width!" + bitmsg, F);
+ break;
+ }
+ // Check some constraints on various intrinsics.
+ switch (ID) {
+ default: break; // Not everything needs to be checked.
+ case Intrinsic::bswap:
+ if (GotBits < 16 || GotBits % 16 != 0)
+ CheckFailed("Intrinsic requires even byte width argument", F);
+ /* FALL THROUGH */
+ case Intrinsic::part_set:
+ case Intrinsic::part_select:
+ if (ArgNo == 1) {
+ unsigned ResultBits =
+ cast<IntegerType>(FTy->getReturnType())->getBitWidth();
+ if (GotBits != ResultBits)
+ CheckFailed("Intrinsic requires the bit widths of the first "
+ "parameter and the result to match", F);
+ }
+ break;
+ }
+ } else if (TypeID == Type::VectorTyID) {
+ // If this is a vector argument, verify the number and type of elements.
+ const VectorType *PTy = cast<VectorType>(Ty);
+ int ElemTy = va_arg(VA, int);
+ if (ElemTy != PTy->getElementType()->getTypeID()) {
+ CheckFailed("Intrinsic prototype has incorrect vector element type!",
+ F);
+ break;
+ }
+ if (ElemTy == Type::IntegerTyID) {
+ unsigned NumBits = (unsigned)va_arg(VA, int);
+ unsigned ExpectedBits =
+ cast<IntegerType>(PTy->getElementType())->getBitWidth();
+ if (NumBits != ExpectedBits) {
+ CheckFailed("Intrinsic prototype has incorrect vector element type!",
+ F);
+ break;
+ }
+ }
+ if ((unsigned)va_arg(VA, int) != PTy->getNumElements()) {
+ CheckFailed("Intrinsic prototype has incorrect number of "
+ "vector elements!",F);
+ break;
+ }
+ }
}
- Assert1(FT->getNumParams() == NumArgs || (FT->getNumParams() < NumArgs &&
- FT->isVarArg()),
- "Illegal # arguments for intrinsic function!", IF);
+ va_end(VA);
+
+ // If we computed a Suffix then the intrinsic is overloaded and we need to
+ // make sure that the name of the function is correct. We add the suffix to
+ // the name of the intrinsic and compare against the given function name. If
+ // they are not the same, the function name is invalid. This ensures that
+ // overloading of intrinsics uses a sane and consistent naming convention.
+ if (!Suffix.empty()) {
+ std::string Name(Intrinsic::getName(ID));
+ if (Name + Suffix != F->getName())
+ CheckFailed("Overloaded intrinsic has incorrect suffix: '" +
+ F->getName().substr(Name.length()) + "'. It should be '" +
+ Suffix + "'", F);
+ }
}
}
-// verifyFunction - Create
+// verifyFunction - Create
bool llvm::verifyFunction(const Function &f, VerifierFailureAction action) {
Function &F = const_cast<Function&>(f);
- assert(!F.isExternal() && "Cannot verify external functions");
-
+ assert(!F.isDeclaration() && "Cannot verify external functions");
+
FunctionPassManager FPM(new ExistingModuleProvider(F.getParent()));
Verifier *V = new Verifier(action);
FPM.add(V);
/// 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) {
+bool llvm::verifyModule(const Module &M, VerifierFailureAction action,
+ std::string *ErrorInfo) {
PassManager PM;
Verifier *V = new Verifier(action);
PM.add(V);
PM.run((Module&)M);
+
+ if (ErrorInfo && V->Broken)
+ *ErrorInfo = V->msgs.str();
return V->Broken;
}
projects / oota-llvm.git / blobdiff