X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FVMCore%2FLinker.cpp;h=beab3d5a847eab8a0ae010552fc2982fcf1529f7;hb=d122f4b648571867c0f8f72290b6c1a0aac02ebb;hp=f3955c89b44766444999d32502e399d83be981e4;hpb=6bfd6a578a3a4fa95c585c988ee712ba880f9923;p=oota-llvm.git diff --git a/lib/VMCore/Linker.cpp b/lib/VMCore/Linker.cpp index f3955c89b44..beab3d5a847 100644 --- a/lib/VMCore/Linker.cpp +++ b/lib/VMCore/Linker.cpp @@ -5,20 +5,16 @@ // Specifically, this: // * Merges global variables between the two modules // * Uninit + Uninit = Init, Init + Uninit = Init, Init + Init = Error if != -// * Merges methods between two modules +// * Merges functions between two modules // //===----------------------------------------------------------------------===// -#include "llvm/Transforms/Linker.h" +#include "llvm/Transforms/Utils/Linker.h" #include "llvm/Module.h" -#include "llvm/Function.h" -#include "llvm/BasicBlock.h" -#include "llvm/GlobalVariable.h" #include "llvm/SymbolTable.h" #include "llvm/DerivedTypes.h" #include "llvm/iOther.h" -#include "llvm/ConstantVals.h" -#include +#include "llvm/Constants.h" using std::cerr; using std::string; using std::map; @@ -31,9 +27,6 @@ static inline bool Error(string *E, string Message) { return true; } -#include "llvm/Assembly/Writer.h" // TODO: REMOVE - - // LinkTypes - Go through the symbol table of the Src module and see if any // types are named in the src module that are not named in the Dst module. // Make sure there are no type name conflicts. @@ -74,8 +67,11 @@ static bool LinkTypes(Module *Dest, const Module *Src, string *Err = 0) { static void PrintMap(const map &M) { for (map::const_iterator I = M.begin(), E = M.end(); I != E; ++I) { - cerr << " Fr: " << (void*)I->first << " " << I->first - << " To: " << (void*)I->second << " " << I->second << "\n"; + cerr << " Fr: " << (void*)I->first << " "; + I->first->dump(); + cerr << " To: " << (void*)I->second << " "; + I->second->dump(); + cerr << "\n"; } } @@ -95,20 +91,20 @@ static Value *RemapOperand(const Value *In, map &LocalMap, } // Check to see if it's a constant that we are interesting in transforming... - if (Constant *CPV = dyn_cast(In)) { - if (!isa(CPV->getType())) - return CPV; // Simple constants stay identical... + if (const Constant *CPV = dyn_cast(In)) { + if (!isa(CPV->getType()) && !isa(CPV)) + return const_cast(CPV); // Simple constants stay identical... Constant *Result = 0; - if (ConstantArray *CPA = dyn_cast(CPV)) { + if (const ConstantArray *CPA = dyn_cast(CPV)) { const std::vector &Ops = CPA->getValues(); std::vector Operands(Ops.size()); - for (unsigned i = 0; i < Ops.size(); ++i) + for (unsigned i = 0, e = Ops.size(); i != e; ++i) Operands[i] = cast(RemapOperand(Ops[i], LocalMap, GlobalMap)); Result = ConstantArray::get(cast(CPA->getType()), Operands); - } else if (ConstantStruct *CPS = dyn_cast(CPV)) { + } else if (const ConstantStruct *CPS = dyn_cast(CPV)) { const std::vector &Ops = CPS->getValues(); std::vector Operands(Ops.size()); for (unsigned i = 0; i < Ops.size(); ++i) @@ -116,16 +112,43 @@ static Value *RemapOperand(const Value *In, map &LocalMap, cast(RemapOperand(Ops[i], LocalMap, GlobalMap)); Result = ConstantStruct::get(cast(CPS->getType()), Operands); } else if (isa(CPV)) { - Result = CPV; - } else if (ConstantPointerRef *CPR = dyn_cast(CPV)) { + Result = const_cast(CPV); + } else if (const ConstantPointerRef *CPR = + dyn_cast(CPV)) { Value *V = RemapOperand(CPR->getValue(), LocalMap, GlobalMap); Result = ConstantPointerRef::get(cast(V)); + } else if (const ConstantExpr *CE = dyn_cast(CPV)) { + if (CE->getOpcode() == Instruction::GetElementPtr) { + Value *Ptr = RemapOperand(CE->getOperand(0), LocalMap, GlobalMap); + std::vector Indices; + Indices.reserve(CE->getNumOperands()-1); + for (unsigned i = 1, e = CE->getNumOperands(); i != e; ++i) + Indices.push_back(cast(RemapOperand(CE->getOperand(i), + LocalMap, GlobalMap))); + + Result = ConstantExpr::getGetElementPtr(cast(Ptr), Indices); + } else if (CE->getNumOperands() == 1) { + // Cast instruction + assert(CE->getOpcode() == Instruction::Cast); + Value *V = RemapOperand(CE->getOperand(0), LocalMap, GlobalMap); + Result = ConstantExpr::getCast(cast(V), CE->getType()); + } else if (CE->getNumOperands() == 2) { + // Binary operator... + Value *V1 = RemapOperand(CE->getOperand(0), LocalMap, GlobalMap); + Value *V2 = RemapOperand(CE->getOperand(1), LocalMap, GlobalMap); + + Result = ConstantExpr::get(CE->getOpcode(), cast(V1), + cast(V2)); + } else { + assert(0 && "Unknown constant expr type!"); + } + } else { assert(0 && "Unknown type of derived type constant value!"); } // Cache the mapping in our local map structure... - LocalMap.insert(std::make_pair(In, CPV)); + LocalMap.insert(std::make_pair(In, Result)); return Result; } @@ -137,7 +160,7 @@ static Value *RemapOperand(const Value *In, map &LocalMap, PrintMap(*GlobalMap); } - cerr << "Couldn't remap value: " << (void*)In << " " << In << "\n"; + cerr << "Couldn't remap value: " << (void*)In << " " << *In << "\n"; assert(0 && "Couldn't remap value!"); return 0; } @@ -155,7 +178,7 @@ static bool LinkGlobals(Module *Dest, const Module *Src, // Loop over all of the globals in the src module, mapping them over as we go // for (Module::const_giterator I = Src->gbegin(), E = Src->gend(); I != E; ++I){ - const GlobalVariable *SGV = *I; + const GlobalVariable *SGV = I; Value *V; // If the global variable has a name, and that name is already in use in the @@ -208,7 +231,7 @@ static bool LinkGlobalInits(Module *Dest, const Module *Src, // Loop over all of the globals in the src module, mapping them over as we go // for (Module::const_giterator I = Src->gbegin(), E = Src->gend(); I != E; ++I){ - const GlobalVariable *SGV = *I; + const GlobalVariable *SGV = I; if (SGV->hasInitializer()) { // Only process initialized GV's // Figure out what the initializer looks like in the dest module... @@ -232,8 +255,8 @@ static bool LinkGlobalInits(Module *Dest, const Module *Src, } // LinkFunctionProtos - Link the functions together between the two modules, -// without doing method bodies... this just adds external method prototypes to -// the Dest function... +// without doing function bodies... this just adds external function prototypes +// to the Dest function... // static bool LinkFunctionProtos(Module *Dest, const Module *Src, map &ValueMap, @@ -242,81 +265,77 @@ static bool LinkFunctionProtos(Module *Dest, const Module *Src, // level symbol table... SymbolTable *ST = Src->getSymbolTable() ? Dest->getSymbolTableSure() : 0; - // Loop over all of the methods in the src module, mapping them over as we go + // Loop over all of the functions in the src module, mapping them over as we + // go // for (Module::const_iterator I = Src->begin(), E = Src->end(); I != E; ++I) { - const Function *SM = *I; // SrcFunction + const Function *SF = I; // SrcFunction Value *V; - // If the method has a name, and that name is already in use in the - // Dest module, make sure that the name is a compatible method... + // If the function has a name, and that name is already in use in the Dest + // module, make sure that the name is a compatible function... // - if (SM->hasExternalLinkage() && SM->hasName() && - (V = ST->lookup(SM->getType(), SM->getName())) && + if (SF->hasExternalLinkage() && SF->hasName() && + (V = ST->lookup(SF->getType(), SF->getName())) && cast(V)->hasExternalLinkage()) { // The same named thing is a Function, because the only two things // that may be in a module level symbol table are Global Vars and // Functions, and they both have distinct, nonoverlapping, possible types. // - Function *DM = cast(V); // DestFunction + Function *DF = cast(V); // DestFunction - // Check to make sure the method is not defined in both modules... - if (!SM->isExternal() && !DM->isExternal()) + // Check to make sure the function is not defined in both modules... + if (!SF->isExternal() && !DF->isExternal()) return Error(Err, "Function '" + - SM->getFunctionType()->getDescription() + "':\"" + - SM->getName() + "\" - Function is already defined!"); + SF->getFunctionType()->getDescription() + "':\"" + + SF->getName() + "\" - Function is already defined!"); // Otherwise, just remember this mapping... - ValueMap.insert(std::make_pair(SM, DM)); + ValueMap.insert(std::make_pair(SF, DF)); } else { - // Function does not already exist, simply insert an external method - // signature identical to SM into the dest module... - Function *DM = new Function(SM->getFunctionType(), - SM->hasInternalLinkage(), - SM->getName()); + // Function does not already exist, simply insert an external function + // signature identical to SF into the dest module... + Function *DF = new Function(SF->getFunctionType(), + SF->hasInternalLinkage(), + SF->getName()); - // Add the method signature to the dest module... - Dest->getFunctionList().push_back(DM); + // Add the function signature to the dest module... + Dest->getFunctionList().push_back(DF); // ... and remember this mapping... - ValueMap.insert(std::make_pair(SM, DM)); + ValueMap.insert(std::make_pair(SF, DF)); } } return false; } -// LinkFunctionBody - Copy the source method over into the dest method -// and fix up references to values. At this point we know that Dest -// is an external method, and that Src is not. +// LinkFunctionBody - Copy the source function over into the dest function and +// fix up references to values. At this point we know that Dest is an external +// function, and that Src is not. // static bool LinkFunctionBody(Function *Dest, const Function *Src, const map &GlobalMap, string *Err = 0) { assert(Src && Dest && Dest->isExternal() && !Src->isExternal()); - map LocalMap; // Map for method local values - - // Go through and convert method arguments over... - for (Function::ArgumentListType::const_iterator - I = Src->getArgumentList().begin(), - E = Src->getArgumentList().end(); I != E; ++I) { - const FunctionArgument *SMA = *I; + map LocalMap; // Map for function local values - // Create the new method argument and add to the dest method... - FunctionArgument *DMA = new FunctionArgument(SMA->getType(),SMA->getName()); - Dest->getArgumentList().push_back(DMA); + // Go through and convert function arguments over... + for (Function::const_aiterator I = Src->abegin(), E = Src->aend(); + I != E; ++I) { + // Create the new function argument and add to the dest function... + Argument *DFA = new Argument(I->getType(), I->getName()); + Dest->getArgumentList().push_back(DFA); // Add a mapping to our local map - LocalMap.insert(std::make_pair(SMA, DMA)); + LocalMap.insert(std::make_pair(I, DFA)); } // Loop over all of the basic blocks, copying the instructions over... // for (Function::const_iterator I = Src->begin(), E = Src->end(); I != E; ++I) { - const BasicBlock *SBB = *I; - - // Create new basic block and add to mapping and the Dest method... - BasicBlock *DBB = new BasicBlock(SBB->getName(), Dest); - LocalMap.insert(std::make_pair(SBB, DBB)); + // Create new basic block and add to mapping and the Dest function... + BasicBlock *DBB = new BasicBlock(I->getName(), Dest); + LocalMap.insert(std::make_pair(I, DBB)); // Loop over all of the instructions in the src basic block, copying them // over. Note that this is broken in a strict sense because the cloned @@ -324,61 +343,54 @@ static bool LinkFunctionBody(Function *Dest, const Function *Src, // the remapped values. In our case, however, we will not get caught and // so we can delay patching the values up until later... // - for (BasicBlock::const_iterator II = SBB->begin(), IE = SBB->end(); + for (BasicBlock::const_iterator II = I->begin(), IE = I->end(); II != IE; ++II) { - const Instruction *SI = *II; - Instruction *DI = SI->clone(); - DI->setName(SI->getName()); + Instruction *DI = II->clone(); + DI->setName(II->getName()); DBB->getInstList().push_back(DI); - LocalMap.insert(std::make_pair(SI, DI)); + LocalMap.insert(std::make_pair(II, DI)); } } - // At this point, all of the instructions and values of the method are now - // copied over. The only problem is that they are still referencing values - // in the Source method as operands. Loop through all of the operands of the - // methods and patch them up to point to the local versions... + // At this point, all of the instructions and values of the function are now + // copied over. The only problem is that they are still referencing values in + // the Source function as operands. Loop through all of the operands of the + // functions and patch them up to point to the local versions... // - for (Function::iterator BI = Dest->begin(), BE = Dest->end(); - BI != BE; ++BI) { - BasicBlock *BB = *BI; - for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) { - Instruction *Inst = *I; - - for (Instruction::op_iterator OI = Inst->op_begin(), OE = Inst->op_end(); + for (Function::iterator BB = Dest->begin(), BE = Dest->end(); BB != BE; ++BB) + for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) + for (Instruction::op_iterator OI = I->op_begin(), OE = I->op_end(); OI != OE; ++OI) *OI = RemapOperand(*OI, LocalMap, &GlobalMap); - } - } return false; } -// LinkFunctionBodies - Link in the method bodies that are defined in the source -// module into the DestModule. This consists basically of copying the method -// over and fixing up references to values. +// LinkFunctionBodies - Link in the function bodies that are defined in the +// source module into the DestModule. This consists basically of copying the +// function over and fixing up references to values. // static bool LinkFunctionBodies(Module *Dest, const Module *Src, map &ValueMap, string *Err = 0) { - // Loop over all of the methods in the src module, mapping them over as we go + // Loop over all of the functions in the src module, mapping them over as we + // go // - for (Module::const_iterator I = Src->begin(), E = Src->end(); I != E; ++I) { - const Function *SM = *I; // Source Function - if (!SM->isExternal()) { // No body if method is external - Function *DM = cast(ValueMap[SM]); // Destination method + for (Module::const_iterator SF = Src->begin(), E = Src->end(); SF != E; ++SF){ + if (!SF->isExternal()) { // No body if function is external + Function *DF = cast(ValueMap[SF]); // Destination function - // DM not external SM external? - if (!DM->isExternal()) { + // DF not external SF external? + if (!DF->isExternal()) { if (Err) - *Err = "Function '" + (SM->hasName() ? SM->getName() : string("")) + + *Err = "Function '" + (SF->hasName() ? SF->getName() : string("")) + "' body multiply defined!"; return true; } - if (LinkFunctionBody(DM, SM, ValueMap, Err)) return true; + if (LinkFunctionBody(DF, SF, ValueMap, Err)) return true; } } return false; @@ -392,7 +404,7 @@ static bool LinkFunctionBodies(Module *Dest, const Module *Src, // the problem. Upon failure, the Dest module could be in a modified state, and // shouldn't be relied on to be consistent. // -bool LinkModules(Module *Dest, const Module *Src, string *ErrorMsg = 0) { +bool LinkModules(Module *Dest, const Module *Src, string *ErrorMsg) { // LinkTypes - Go through the symbol table of the Src module and see if any // types are named in the src module that are not named in the Dst module. @@ -409,21 +421,22 @@ bool LinkModules(Module *Dest, const Module *Src, string *ErrorMsg = 0) { // initializers if (LinkGlobals(Dest, Src, ValueMap, ErrorMsg)) return true; + // Link the functions together between the two modules, without doing function + // bodies... this just adds external function prototypes to the Dest + // function... We do this so that when we begin processing function bodies, + // all of the global values that may be referenced are available in our + // ValueMap. + // + if (LinkFunctionProtos(Dest, Src, ValueMap, ErrorMsg)) return true; + // Update the initializers in the Dest module now that all globals that may // be referenced are in Dest. // if (LinkGlobalInits(Dest, Src, ValueMap, ErrorMsg)) return true; - // Link the methods together between the two modules, without doing method - // bodies... this just adds external method prototypes to the Dest method... - // We do this so that when we begin processing method bodies, all of the - // global values that may be referenced are available in our ValueMap. - // - if (LinkFunctionProtos(Dest, Src, ValueMap, ErrorMsg)) return true; - - // Link in the method bodies that are defined in the source module into the - // DestModule. This consists basically of copying the method over and fixing - // up references to values. + // Link in the function bodies that are defined in the source module into the + // DestModule. This consists basically of copying the function over and + // fixing up references to values. // if (LinkFunctionBodies(Dest, Src, ValueMap, ErrorMsg)) return true;