#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/Constants.h"
-#include "llvm/Argument.h"
-#include <iostream>
-using std::cerr;
-using std::string;
-using std::map;
// Error - Simple wrapper function to conditionally assign to E and return true.
// This just makes error return conditions a little bit simpler...
//
-static inline bool Error(string *E, string Message) {
+static inline bool Error(std::string *E, std::string Message) {
if (E) *E = Message;
return true;
}
// types are named in the src module that are not named in the Dst module.
// Make sure there are no type name conflicts.
//
-static bool LinkTypes(Module *Dest, const Module *Src, string *Err = 0) {
- // No symbol table? Can't have named types.
- if (!Src->hasSymbolTable()) return false;
-
- SymbolTable *DestST = Dest->getSymbolTableSure();
- const SymbolTable *SrcST = Src->getSymbolTable();
+static bool LinkTypes(Module *Dest, const Module *Src, std::string *Err) {
+ SymbolTable *DestST = &Dest->getSymbolTable();
+ const SymbolTable *SrcST = &Src->getSymbolTable();
// Look for a type plane for Type's...
SymbolTable::const_iterator PI = SrcST->find(Type::TypeTy);
const SymbolTable::VarMap &VM = PI->second;
for (SymbolTable::type_const_iterator I = VM.begin(), E = VM.end();
I != E; ++I) {
- const string &Name = I->first;
+ const std::string &Name = I->first;
const Type *RHS = cast<Type>(I->second);
// Check to see if this type name is already in the dest module...
const Type *Entry = cast_or_null<Type>(DestST->lookup(Type::TypeTy, Name));
- if (Entry) { // Yup, the value already exists...
- if (Entry != RHS) // If it's the same, noop. Otherwise, error.
- return Error(Err, "Type named '" + Name +
- "' of different shape in modules.\n Src='" +
- Entry->getDescription() + "'.\n Dst='" +
- RHS->getDescription() + "'");
+ if (Entry && !isa<OpaqueType>(Entry)) { // Yup, the value already exists...
+ if (Entry != RHS) {
+ if (OpaqueType *OT = dyn_cast<OpaqueType>(const_cast<Type*>(RHS))) {
+ OT->refineAbstractTypeTo(Entry);
+ } else {
+ // If it's the same, noop. Otherwise, error.
+ return Error(Err, "Type named '" + Name +
+ "' of different shape in modules.\n Src='" +
+ Entry->getDescription() + "'.\n Dst='" +
+ RHS->getDescription() + "'");
+ }
+ }
} else { // Type not in dest module. Add it now.
+ if (Entry) {
+ OpaqueType *OT = cast<OpaqueType>(const_cast<Type*>(Entry));
+ OT->refineAbstractTypeTo(RHS);
+ }
+
// TODO: FIXME WHEN TYPES AREN'T CONST
DestST->insert(Name, const_cast<Type*>(RHS));
}
return false;
}
-static void PrintMap(const map<const Value*, Value*> &M) {
- for (map<const Value*, Value*>::const_iterator I = M.begin(), E = M.end();
+static void PrintMap(const std::map<const Value*, Value*> &M) {
+ for (std::map<const Value*, Value*>::const_iterator I = M.begin(), E =M.end();
I != E; ++I) {
- cerr << " Fr: " << (void*)I->first << " ";
+ std::cerr << " Fr: " << (void*)I->first << " ";
I->first->dump();
- cerr << " To: " << (void*)I->second << " ";
+ std::cerr << " To: " << (void*)I->second << " ";
I->second->dump();
- cerr << "\n";
+ std::cerr << "\n";
}
}
// module to another. This is somewhat sophisticated in that it can
// automatically handle constant references correctly as well...
//
-static Value *RemapOperand(const Value *In, map<const Value*, Value*> &LocalMap,
- const map<const Value*, Value*> *GlobalMap = 0) {
- map<const Value*,Value*>::const_iterator I = LocalMap.find(In);
+static Value *RemapOperand(const Value *In,
+ std::map<const Value*, Value*> &LocalMap,
+ std::map<const Value*, Value*> *GlobalMap) {
+ std::map<const Value*,Value*>::const_iterator I = LocalMap.find(In);
if (I != LocalMap.end()) return I->second;
if (GlobalMap) {
Value *V = RemapOperand(CPR->getValue(), LocalMap, GlobalMap);
Result = ConstantPointerRef::get(cast<GlobalValue>(V));
} else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CPV)) {
- if (CE->getNumOperands() == 1) {
- // Cast instruction, unary operator
+ if (CE->getOpcode() == Instruction::GetElementPtr) {
+ Value *Ptr = RemapOperand(CE->getOperand(0), LocalMap, GlobalMap);
+ std::vector<Constant*> Indices;
+ Indices.reserve(CE->getNumOperands()-1);
+ for (unsigned i = 1, e = CE->getNumOperands(); i != e; ++i)
+ Indices.push_back(cast<Constant>(RemapOperand(CE->getOperand(i),
+ LocalMap, GlobalMap)));
+
+ Result = ConstantExpr::getGetElementPtr(cast<Constant>(Ptr), Indices);
+ } else if (CE->getNumOperands() == 1) {
+ // Cast instruction
+ assert(CE->getOpcode() == Instruction::Cast);
Value *V = RemapOperand(CE->getOperand(0), LocalMap, GlobalMap);
- Result = ConstantExpr::get(CE->getOpcode(), cast<Constant>(V),
- CE->getType());
+ Result = ConstantExpr::getCast(cast<Constant>(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<Constant>(V1),
- cast<Constant>(V2), CE->getType());
+ cast<Constant>(V2));
} else {
- // GetElementPtr Expression
- assert(CE->getOpcode() == Instruction::GetElementPtr);
- Value *Ptr = RemapOperand(CE->getOperand(0), LocalMap, GlobalMap);
- std::vector<Constant*> Indices;
- Indices.reserve(CE->getNumOperands()-1);
- for (unsigned i = 1, e = CE->getNumOperands(); i != e; ++i)
- Indices.push_back(cast<Constant>(RemapOperand(CE->getOperand(i),
- LocalMap, GlobalMap)));
-
- Result = ConstantExpr::get(CE->getOpcode(), cast<Constant>(Ptr),
- Indices, CE->getType());
+ assert(0 && "Unknown constant expr type!");
}
} else {
}
// Cache the mapping in our local map structure...
- LocalMap.insert(std::make_pair(In, Result));
+ if (GlobalMap)
+ GlobalMap->insert(std::make_pair(In, Result));
+ else
+ LocalMap.insert(std::make_pair(In, Result));
return Result;
}
- cerr << "XXX LocalMap: \n";
+ std::cerr << "XXX LocalMap: \n";
PrintMap(LocalMap);
if (GlobalMap) {
- cerr << "XXX GlobalMap: \n";
+ std::cerr << "XXX GlobalMap: \n";
PrintMap(*GlobalMap);
}
- cerr << "Couldn't remap value: " << (void*)In << " " << *In << "\n";
+ std::cerr << "Couldn't remap value: " << (void*)In << " " << *In << "\n";
assert(0 && "Couldn't remap value!");
return 0;
}
// them into the dest module...
//
static bool LinkGlobals(Module *Dest, const Module *Src,
- map<const Value*, Value*> &ValueMap, string *Err = 0) {
+ std::map<const Value*, Value*> &ValueMap,
+ std::string *Err) {
// We will need a module level symbol table if the src module has a module
// level symbol table...
- SymbolTable *ST = Src->getSymbolTable() ? Dest->getSymbolTableSure() : 0;
+ SymbolTable *ST = (SymbolTable*)&Dest->getSymbolTable();
// 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;
- Value *V;
-
- // If the global variable has a name, and that name is already in use in the
- // Dest module, make sure that the name is a compatible global variable...
- //
- if (SGV->hasExternalLinkage() && SGV->hasName() &&
- (V = ST->lookup(SGV->getType(), SGV->getName())) &&
- cast<GlobalVariable>(V)->hasExternalLinkage()) {
- // The same named thing is a global variable, because the only two things
+ GlobalVariable *DGV = 0;
+ if (SGV->hasName()) {
+ // A same named thing is a global variable, 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.
//
- GlobalVariable *DGV = cast<GlobalVariable>(V);
+ DGV = cast_or_null<GlobalVariable>(ST->lookup(SGV->getType(),
+ SGV->getName()));
+ }
- // Check to see if the two GV's have the same Const'ness...
- if (SGV->isConstant() != DGV->isConstant())
- return Error(Err, "Global Variable Collision on '" +
- SGV->getType()->getDescription() + "':%" + SGV->getName() +
- " - Global variables differ in const'ness");
+ assert(SGV->hasInitializer() || SGV->hasExternalLinkage() &&
+ "Global must either be external or have an initializer!");
- // Okay, everything is cool, remember the mapping...
- ValueMap.insert(std::make_pair(SGV, DGV));
- } else {
+ bool SGExtern = SGV->isExternal();
+ bool DGExtern = DGV ? DGV->isExternal() : false;
+
+ if (!DGV || DGV->hasInternalLinkage() || SGV->hasInternalLinkage()) {
// No linking to be performed, simply create an identical version of the
// symbol over in the dest module... the initializer will be filled in
// later by LinkGlobalInits...
//
- GlobalVariable *DGV =
- new GlobalVariable(SGV->getType()->getElementType(), SGV->isConstant(),
- SGV->hasInternalLinkage(), 0, SGV->getName());
-
- // Add the new global to the dest module
- Dest->getGlobalList().push_back(DGV);
+ GlobalVariable *NewDGV =
+ new GlobalVariable(SGV->getType()->getElementType(),
+ SGV->isConstant(), SGV->getLinkage(), /*init*/0,
+ SGV->getName(), Dest);
+
+ // If the LLVM runtime renamed the global, but it is an externally visible
+ // symbol, DGV must be an existing global with internal linkage. Rename
+ // it.
+ if (NewDGV->getName() != SGV->getName() && !NewDGV->hasInternalLinkage()){
+ assert(DGV && DGV->getName() == SGV->getName() &&
+ DGV->hasInternalLinkage());
+ DGV->setName("");
+ NewDGV->setName(SGV->getName()); // Force the name back
+ DGV->setName(SGV->getName()); // This will cause a renaming
+ assert(NewDGV->getName() == SGV->getName() &&
+ DGV->getName() != SGV->getName());
+ }
// Make sure to remember this mapping...
+ ValueMap.insert(std::make_pair(SGV, NewDGV));
+ } else if (SGV->isExternal()) {
+ // If SGV is external or if both SGV & DGV are external.. Just link the
+ // external globals, we aren't adding anything.
+ ValueMap.insert(std::make_pair(SGV, DGV));
+
+ } else if (DGV->isExternal()) { // If DGV is external but SGV is not...
+ ValueMap.insert(std::make_pair(SGV, DGV));
+ DGV->setLinkage(SGV->getLinkage()); // Inherit linkage!
+ } else if (SGV->getLinkage() != DGV->getLinkage()) {
+ return Error(Err, "Global variables named '" + SGV->getName() +
+ "' have different linkage specifiers!");
+ } else if (SGV->hasExternalLinkage()) {
+ // Allow linking two exactly identical external global variables...
+ if (SGV->isConstant() != DGV->isConstant() ||
+ SGV->getInitializer() != DGV->getInitializer())
+ return Error(Err, "Global Variable Collision on '" +
+ SGV->getType()->getDescription() + " %" + SGV->getName() +
+ "' - Global variables differ in const'ness");
ValueMap.insert(std::make_pair(SGV, DGV));
+ } else if (SGV->hasLinkOnceLinkage()) {
+ // If the global variable has a name, and that name is already in use in
+ // the Dest module, make sure that the name is a compatible global
+ // variable...
+ //
+ // Check to see if the two GV's have the same Const'ness...
+ if (SGV->isConstant() != DGV->isConstant())
+ return Error(Err, "Global Variable Collision on '" +
+ SGV->getType()->getDescription() + " %" + SGV->getName() +
+ "' - Global variables differ in const'ness");
+
+ // Okay, everything is cool, remember the mapping...
+ ValueMap.insert(std::make_pair(SGV, DGV));
+ } else if (SGV->hasAppendingLinkage()) {
+ assert(0 && "FIXME: Appending linkage unimplemented!");
+ } else {
+ assert(0 && "Unknown linkage!");
}
}
return false;
// globals that may be referenced are in Dest.
//
static bool LinkGlobalInits(Module *Dest, const Module *Src,
- map<const Value*, Value*> &ValueMap,
- string *Err = 0) {
+ std::map<const Value*, Value*> &ValueMap,
+ std::string *Err) {
// Loop over all of the globals in the src module, mapping them over as we go
//
if (SGV->hasInitializer()) { // Only process initialized GV's
// Figure out what the initializer looks like in the dest module...
- Constant *DInit =
- cast<Constant>(RemapOperand(SGV->getInitializer(), ValueMap));
+ Constant *SInit =
+ cast<Constant>(RemapOperand(SGV->getInitializer(), ValueMap, 0));
GlobalVariable *DGV = cast<GlobalVariable>(ValueMap[SGV]);
- if (DGV->hasInitializer() && SGV->hasExternalLinkage() &&
- DGV->hasExternalLinkage()) {
- if (DGV->getInitializer() != DInit)
- return Error(Err, "Global Variable Collision on '" +
- SGV->getType()->getDescription() + "':%" +SGV->getName()+
- " - Global variables have different initializers");
+ if (DGV->hasInitializer()) {
+ assert(SGV->getLinkage() == DGV->getLinkage());
+ if (SGV->hasExternalLinkage()) {
+ if (DGV->getInitializer() != SInit)
+ return Error(Err, "Global Variable Collision on '" +
+ SGV->getType()->getDescription() +"':%"+SGV->getName()+
+ " - Global variables have different initializers");
+ } else if (DGV->hasLinkOnceLinkage()) {
+ // Nothing is required, mapped values will take the new global
+ // automatically.
+ } else if (DGV->hasAppendingLinkage()) {
+ assert(0 && "Appending linkage unimplemented!");
+ } else {
+ assert(0 && "Unknown linkage!");
+ }
} else {
// Copy the initializer over now...
- DGV->setInitializer(DInit);
+ DGV->setInitializer(SInit);
}
}
}
// to the Dest function...
//
static bool LinkFunctionProtos(Module *Dest, const Module *Src,
- map<const Value*, Value*> &ValueMap,
- string *Err = 0) {
- // We will need a module level symbol table if the src module has a module
- // level symbol table...
- SymbolTable *ST = Src->getSymbolTable() ? Dest->getSymbolTableSure() : 0;
+ std::map<const Value*, Value*> &ValueMap,
+ std::string *Err) {
+ SymbolTable *ST = (SymbolTable*)&Dest->getSymbolTable();
// 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 *SF = I; // SrcFunction
- Value *V;
-
- // 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 (SF->hasExternalLinkage() && SF->hasName() &&
- (V = ST->lookup(SF->getType(), SF->getName())) &&
- cast<Function>(V)->hasExternalLinkage()) {
+ Function *DF = 0;
+ if (SF->hasName())
// 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 *DF = cast<Function>(V); // DestFunction
-
- // Check to make sure the function is not defined in both modules...
- if (!SF->isExternal() && !DF->isExternal())
- return Error(Err, "Function '" +
- SF->getFunctionType()->getDescription() + "':\"" +
- SF->getName() + "\" - Function is already defined!");
-
- // Otherwise, just remember this mapping...
- ValueMap.insert(std::make_pair(SF, DF));
- } else {
- // 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 function signature to the dest module...
- Dest->getFunctionList().push_back(DF);
+ DF = cast_or_null<Function>(ST->lookup(SF->getType(), SF->getName()));
+
+ if (!DF || SF->hasInternalLinkage() || DF->hasInternalLinkage()) {
+ // Function does not already exist, simply insert an function signature
+ // identical to SF into the dest module...
+ Function *NewDF = new Function(SF->getFunctionType(), SF->getLinkage(),
+ SF->getName(), Dest);
+
+ // If the LLVM runtime renamed the function, but it is an externally
+ // visible symbol, DF must be an existing function with internal linkage.
+ // Rename it.
+ if (NewDF->getName() != SF->getName() && !NewDF->hasInternalLinkage()) {
+ assert(DF && DF->getName() == SF->getName() &&DF->hasInternalLinkage());
+ DF->setName("");
+ NewDF->setName(SF->getName()); // Force the name back
+ DF->setName(SF->getName()); // This will cause a renaming
+ assert(NewDF->getName() == SF->getName() &&
+ DF->getName() != SF->getName());
+ }
// ... and remember this mapping...
+ ValueMap.insert(std::make_pair(SF, NewDF));
+ } else if (SF->isExternal()) {
+ // If SF is external or if both SF & DF are external.. Just link the
+ // external functions, we aren't adding anything.
+ ValueMap.insert(std::make_pair(SF, DF));
+ } else if (DF->isExternal()) { // If DF is external but SF is not...
+ // Link the external functions, update linkage qualifiers
ValueMap.insert(std::make_pair(SF, DF));
+ DF->setLinkage(SF->getLinkage());
+
+ } else if (SF->getLinkage() != DF->getLinkage()) {
+ return Error(Err, "Functions named '" + SF->getName() +
+ "' have different linkage specifiers!");
+ } else if (SF->hasExternalLinkage()) {
+ // The function is defined in both modules!!
+ return Error(Err, "Function '" +
+ SF->getFunctionType()->getDescription() + "':\"" +
+ SF->getName() + "\" - Function is already defined!");
+ } else if (SF->hasLinkOnceLinkage()) {
+ // Completely ignore the source function.
+ ValueMap.insert(std::make_pair(SF, DF));
+ } else {
+ assert(0 && "Unknown linkage configuration found!");
}
}
return false;
// function, and that Src is not.
//
static bool LinkFunctionBody(Function *Dest, const Function *Src,
- const map<const Value*, Value*> &GlobalMap,
- string *Err = 0) {
+ std::map<const Value*, Value*> &GlobalMap,
+ std::string *Err) {
assert(Src && Dest && Dest->isExternal() && !Src->isExternal());
- map<const Value*, Value*> LocalMap; // Map for function local values
+ std::map<const Value*, Value*> LocalMap; // Map for function local values
// Go through and convert function arguments over...
+ Function::aiterator DI = Dest->abegin();
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);
+ I != E; ++I, ++DI) {
+ DI->setName(I->getName()); // Copy the name information over...
// Add a mapping to our local map
- LocalMap.insert(std::make_pair(I, DFA));
+ LocalMap.insert(std::make_pair(I, DI));
}
// Loop over all of the basic blocks, copying the instructions over...
// function over and fixing up references to values.
//
static bool LinkFunctionBodies(Module *Dest, const Module *Src,
- map<const Value*, Value*> &ValueMap,
- string *Err = 0) {
+ std::map<const Value*, Value*> &ValueMap,
+ std::string *Err) {
// Loop over all of the functions in the src module, mapping them over as we
// go
// DF not external SF external?
if (!DF->isExternal()) {
+ if (DF->hasLinkOnceLinkage()) continue; // No relinkage for link-once!
if (Err)
- *Err = "Function '" + (SF->hasName() ? SF->getName() : string("")) +
- "' body multiply defined!";
+ *Err = "Function '" + (SF->hasName() ? SF->getName() :std::string(""))
+ + "' body multiply defined!";
return true;
}
// 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) {
+bool LinkModules(Module *Dest, const Module *Src, std::string *ErrorMsg) {
+ if (Dest->getEndianness() != Src->getEndianness())
+ std::cerr << "WARNING: Linking two modules of different endianness!\n";
+ if (Dest->getPointerSize() != Src->getPointerSize())
+ std::cerr << "WARNING: Linking two modules of different pointer size!\n";
// 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.
// ValueMap - Mapping of values from what they used to be in Src, to what they
// are now in Dest.
//
- map<const Value*, Value*> ValueMap;
-
- // FIXME:
- // FIXME: This should be a two step process:
- // FIXME: 1. LinkGlobals & LinkFunctionProtos
- // FIXME: 2. LinkGlobalContents
- // FIXME:
- // FIXME: Global variables and functions are the same!
- // FIXME:
-
+ std::map<const Value*, Value*> ValueMap;
// Insert all of the globals in src into the Dest module... without
// initializers
projects / oota-llvm.git / blobdiff