// This file implements the LLVM module linker.
//
// Specifically, this:
-// - Merges global variables between the two modules
-// - Uninit + Uninit = Init, Init + Uninit = Init, Init + Init = Error if !=
+// * Merges global variables between the two modules
+// * Uninit + Uninit = Init, Init + Uninit = Init, Init + Init = Error if !=
+// * Merges methods between two modules
//
//===----------------------------------------------------------------------===//
// module to another. This is somewhat sophisticated in that it can
// automatically handle constant references correctly as well...
//
-static Value *RemapOperand(Value *In, map<const Value*, Value*> &LocalMap,
+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);
if (I != LocalMap.end()) return I->second;
if (I != GlobalMap->end()) return I->second;
}
- if (!isa<ConstPoolVal>(In))
- cerr << "Couldn't remap value: " << In << endl;
- return In;
+ // Check to see if it's a constant that we are interesting in transforming...
+ if (ConstPoolVal *CPV = dyn_cast<ConstPoolVal>(In)) {
+ if (!isa<DerivedType>(CPV->getType()))
+ return CPV; // Simple constants stay identical...
+
+ ConstPoolVal *Result = 0;
+
+ if (ConstPoolArray *CPA = dyn_cast<ConstPoolArray>(CPV)) {
+ const vector<Use> &Ops = CPA->getValues();
+ vector<ConstPoolVal*> Operands(Ops.size());
+ for (unsigned i = 0; i < Ops.size(); ++i)
+ Operands[i] =
+ cast<ConstPoolVal>(RemapOperand(Ops[i], LocalMap, GlobalMap));
+ Result = ConstPoolArray::get(cast<ArrayType>(CPA->getType()), Operands);
+ } else if (ConstPoolStruct *CPS = dyn_cast<ConstPoolStruct>(CPV)) {
+ const vector<Use> &Ops = CPS->getValues();
+ vector<ConstPoolVal*> Operands(Ops.size());
+ for (unsigned i = 0; i < Ops.size(); ++i)
+ Operands[i] =
+ cast<ConstPoolVal>(RemapOperand(Ops[i], LocalMap, GlobalMap));
+ Result = ConstPoolStruct::get(cast<StructType>(CPS->getType()), Operands);
+ } else if (isa<ConstPoolPointerNull>(CPV)) {
+ Result = CPV;
+ } else if (ConstPoolPointerReference *CPR =
+ dyn_cast<ConstPoolPointerReference>(CPV)) {
+ Value *V = RemapOperand(CPR->getValue(), LocalMap, GlobalMap);
+ Result = ConstPoolPointerReference::get(cast<GlobalValue>(V));
+ } else {
+ assert(0 && "Unknown type of derived type constant value!");
+ }
+
+ // Cache the mapping in our local map structure...
+ LocalMap.insert(make_pair(In, CPV));
+ return Result;
+ }
+
+ cerr << "Couldn't remap value: " << In << endl;
+ assert(0 && "Couldn't remap value!");
+ return 0;
}
// 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 *GV = *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 (GV->hasName() && (V = ST->lookup(GV->getType(), GV->getName()))) {
+ if (SGV->hasName() && (V = ST->lookup(SGV->getType(), SGV->getName()))) {
// The 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 Methods,
// and they both have distinct, nonoverlapping, possible types.
GlobalVariable *DGV = cast<GlobalVariable>(V);
// Check to see if the two GV's have the same Const'ness...
- if (GV->isConstant() != DGV->isConstant())
+ if (SGV->isConstant() != DGV->isConstant())
return Error(Err, "Global Variable Collision on '" +
- GV->getType()->getDescription() + "':%" + GV->getName() +
+ SGV->getType()->getDescription() + "':%" + SGV->getName() +
" - Global variables differ in const'ness");
- // Check to make sure that they both have the same initializer if they are
- // both initialized...
- //
- // TODO: Check to see if they have DEEP equality. For Module level constants
- if (GV->hasInitializer() && DGV->hasInitializer() &&
- GV->getInitializer() != DGV->getInitializer())
- return Error(Err, "Global Variable Collision on '" +
- GV->getType()->getDescription() + "':%" + GV->getName() +
- " - Global variables have different initializers");
-
- // Okay, everything is cool, remember the mapping and update the
- // initializer if neccesary...
- //
-// TODO: We might have to map module level constants here!
- if (GV->hasInitializer() && !DGV->hasInitializer())
- DGV->setInitializer(GV->getInitializer());
-
- ValueMap.insert(make_pair(GV, DGV));
+ // Okay, everything is cool, remember the mapping...
+ ValueMap.insert(make_pair(SGV, DGV));
} else {
// No linking to be performed, simply create an identical version of the
- // symbol over in the dest module...
-// TODO: Provide constpoolval mapping for initializer if using module local
-// initializers!
- GlobalVariable *NGV =
- new GlobalVariable(GV->getType()->getValueType(), GV->isConstant(),
- GV->hasInitializer() ? GV->getInitializer() : 0,
- GV->getName());
+ // symbol over in the dest module... the initializer will be filled in
+ // later by LinkGlobalInits...
+ //
+ GlobalVariable *DGV =
+ new GlobalVariable(SGV->getType()->getValueType(), SGV->isConstant(),
+ 0, SGV->getName());
// Add the new global to the dest module
- Dest->getGlobalList().push_back(NGV);
+ Dest->getGlobalList().push_back(DGV);
// Make sure to remember this mapping...
- ValueMap.insert(make_pair(GV, NGV));
+ ValueMap.insert(make_pair(SGV, DGV));
}
}
return false;
}
+// LinkGlobalInits - Update the initializers in the Dest module now that all
+// globals that may be referenced are in Dest.
+//
+static bool LinkGlobalInits(Module *Dest, const Module *Src,
+ map<const Value*, Value*> &ValueMap,
+ string *Err = 0) {
+
+ // 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;
+
+ if (SGV->hasInitializer()) { // Only process initialized GV's
+ // Figure out what the initializer looks like in the dest module...
+ ConstPoolVal *DInit =
+ cast<ConstPoolVal>(RemapOperand(SGV->getInitializer(), ValueMap));
+
+ GlobalVariable *DGV = cast<GlobalVariable>(ValueMap[SGV]);
+ if (DGV->hasInitializer()) {
+ if (DGV->getInitializer() != DInit)
+ return Error(Err, "Global Variable Collision on '" +
+ SGV->getType()->getDescription() + "':%" +SGV->getName()+
+ " - Global variables have different initializers");
+ } else {
+ // Copy the initializer over now...
+ DGV->setInitializer(DInit);
+ }
+ }
+ }
+ return false;
+}
// LinkMethodProtos - Link the methods together between the two modules, without
// doing method bodies... this just adds external method prototypes to the Dest
//
map<const Value*, Value*> ValueMap;
- // Link the globals variables together between the two modules...
+ // Insert all of the globals in src into the Dest module... without
+ // initializers
if (LinkGlobals(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
// This file implements the LLVM module linker.
//
// Specifically, this:
-// - Merges global variables between the two modules
-// - Uninit + Uninit = Init, Init + Uninit = Init, Init + Init = Error if !=
+// * Merges global variables between the two modules
+// * Uninit + Uninit = Init, Init + Uninit = Init, Init + Init = Error if !=
+// * Merges methods between two modules
//
//===----------------------------------------------------------------------===//
// module to another. This is somewhat sophisticated in that it can
// automatically handle constant references correctly as well...
//
-static Value *RemapOperand(Value *In, map<const Value*, Value*> &LocalMap,
+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);
if (I != LocalMap.end()) return I->second;
if (I != GlobalMap->end()) return I->second;
}
- if (!isa<ConstPoolVal>(In))
- cerr << "Couldn't remap value: " << In << endl;
- return In;
+ // Check to see if it's a constant that we are interesting in transforming...
+ if (ConstPoolVal *CPV = dyn_cast<ConstPoolVal>(In)) {
+ if (!isa<DerivedType>(CPV->getType()))
+ return CPV; // Simple constants stay identical...
+
+ ConstPoolVal *Result = 0;
+
+ if (ConstPoolArray *CPA = dyn_cast<ConstPoolArray>(CPV)) {
+ const vector<Use> &Ops = CPA->getValues();
+ vector<ConstPoolVal*> Operands(Ops.size());
+ for (unsigned i = 0; i < Ops.size(); ++i)
+ Operands[i] =
+ cast<ConstPoolVal>(RemapOperand(Ops[i], LocalMap, GlobalMap));
+ Result = ConstPoolArray::get(cast<ArrayType>(CPA->getType()), Operands);
+ } else if (ConstPoolStruct *CPS = dyn_cast<ConstPoolStruct>(CPV)) {
+ const vector<Use> &Ops = CPS->getValues();
+ vector<ConstPoolVal*> Operands(Ops.size());
+ for (unsigned i = 0; i < Ops.size(); ++i)
+ Operands[i] =
+ cast<ConstPoolVal>(RemapOperand(Ops[i], LocalMap, GlobalMap));
+ Result = ConstPoolStruct::get(cast<StructType>(CPS->getType()), Operands);
+ } else if (isa<ConstPoolPointerNull>(CPV)) {
+ Result = CPV;
+ } else if (ConstPoolPointerReference *CPR =
+ dyn_cast<ConstPoolPointerReference>(CPV)) {
+ Value *V = RemapOperand(CPR->getValue(), LocalMap, GlobalMap);
+ Result = ConstPoolPointerReference::get(cast<GlobalValue>(V));
+ } else {
+ assert(0 && "Unknown type of derived type constant value!");
+ }
+
+ // Cache the mapping in our local map structure...
+ LocalMap.insert(make_pair(In, CPV));
+ return Result;
+ }
+
+ cerr << "Couldn't remap value: " << In << endl;
+ assert(0 && "Couldn't remap value!");
+ return 0;
}
// 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 *GV = *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 (GV->hasName() && (V = ST->lookup(GV->getType(), GV->getName()))) {
+ if (SGV->hasName() && (V = ST->lookup(SGV->getType(), SGV->getName()))) {
// The 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 Methods,
// and they both have distinct, nonoverlapping, possible types.
GlobalVariable *DGV = cast<GlobalVariable>(V);
// Check to see if the two GV's have the same Const'ness...
- if (GV->isConstant() != DGV->isConstant())
+ if (SGV->isConstant() != DGV->isConstant())
return Error(Err, "Global Variable Collision on '" +
- GV->getType()->getDescription() + "':%" + GV->getName() +
+ SGV->getType()->getDescription() + "':%" + SGV->getName() +
" - Global variables differ in const'ness");
- // Check to make sure that they both have the same initializer if they are
- // both initialized...
- //
- // TODO: Check to see if they have DEEP equality. For Module level constants
- if (GV->hasInitializer() && DGV->hasInitializer() &&
- GV->getInitializer() != DGV->getInitializer())
- return Error(Err, "Global Variable Collision on '" +
- GV->getType()->getDescription() + "':%" + GV->getName() +
- " - Global variables have different initializers");
-
- // Okay, everything is cool, remember the mapping and update the
- // initializer if neccesary...
- //
-// TODO: We might have to map module level constants here!
- if (GV->hasInitializer() && !DGV->hasInitializer())
- DGV->setInitializer(GV->getInitializer());
-
- ValueMap.insert(make_pair(GV, DGV));
+ // Okay, everything is cool, remember the mapping...
+ ValueMap.insert(make_pair(SGV, DGV));
} else {
// No linking to be performed, simply create an identical version of the
- // symbol over in the dest module...
-// TODO: Provide constpoolval mapping for initializer if using module local
-// initializers!
- GlobalVariable *NGV =
- new GlobalVariable(GV->getType()->getValueType(), GV->isConstant(),
- GV->hasInitializer() ? GV->getInitializer() : 0,
- GV->getName());
+ // symbol over in the dest module... the initializer will be filled in
+ // later by LinkGlobalInits...
+ //
+ GlobalVariable *DGV =
+ new GlobalVariable(SGV->getType()->getValueType(), SGV->isConstant(),
+ 0, SGV->getName());
// Add the new global to the dest module
- Dest->getGlobalList().push_back(NGV);
+ Dest->getGlobalList().push_back(DGV);
// Make sure to remember this mapping...
- ValueMap.insert(make_pair(GV, NGV));
+ ValueMap.insert(make_pair(SGV, DGV));
}
}
return false;
}
+// LinkGlobalInits - Update the initializers in the Dest module now that all
+// globals that may be referenced are in Dest.
+//
+static bool LinkGlobalInits(Module *Dest, const Module *Src,
+ map<const Value*, Value*> &ValueMap,
+ string *Err = 0) {
+
+ // 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;
+
+ if (SGV->hasInitializer()) { // Only process initialized GV's
+ // Figure out what the initializer looks like in the dest module...
+ ConstPoolVal *DInit =
+ cast<ConstPoolVal>(RemapOperand(SGV->getInitializer(), ValueMap));
+
+ GlobalVariable *DGV = cast<GlobalVariable>(ValueMap[SGV]);
+ if (DGV->hasInitializer()) {
+ if (DGV->getInitializer() != DInit)
+ return Error(Err, "Global Variable Collision on '" +
+ SGV->getType()->getDescription() + "':%" +SGV->getName()+
+ " - Global variables have different initializers");
+ } else {
+ // Copy the initializer over now...
+ DGV->setInitializer(DInit);
+ }
+ }
+ }
+ return false;
+}
// LinkMethodProtos - Link the methods together between the two modules, without
// doing method bodies... this just adds external method prototypes to the Dest
//
map<const Value*, Value*> ValueMap;
- // Link the globals variables together between the two modules...
+ // Insert all of the globals in src into the Dest module... without
+ // initializers
if (LinkGlobals(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
// This file implements the LLVM module linker.
//
// Specifically, this:
-// - Merges global variables between the two modules
-// - Uninit + Uninit = Init, Init + Uninit = Init, Init + Init = Error if !=
+// * Merges global variables between the two modules
+// * Uninit + Uninit = Init, Init + Uninit = Init, Init + Init = Error if !=
+// * Merges methods between two modules
//
//===----------------------------------------------------------------------===//
// module to another. This is somewhat sophisticated in that it can
// automatically handle constant references correctly as well...
//
-static Value *RemapOperand(Value *In, map<const Value*, Value*> &LocalMap,
+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);
if (I != LocalMap.end()) return I->second;
if (I != GlobalMap->end()) return I->second;
}
- if (!isa<ConstPoolVal>(In))
- cerr << "Couldn't remap value: " << In << endl;
- return In;
+ // Check to see if it's a constant that we are interesting in transforming...
+ if (ConstPoolVal *CPV = dyn_cast<ConstPoolVal>(In)) {
+ if (!isa<DerivedType>(CPV->getType()))
+ return CPV; // Simple constants stay identical...
+
+ ConstPoolVal *Result = 0;
+
+ if (ConstPoolArray *CPA = dyn_cast<ConstPoolArray>(CPV)) {
+ const vector<Use> &Ops = CPA->getValues();
+ vector<ConstPoolVal*> Operands(Ops.size());
+ for (unsigned i = 0; i < Ops.size(); ++i)
+ Operands[i] =
+ cast<ConstPoolVal>(RemapOperand(Ops[i], LocalMap, GlobalMap));
+ Result = ConstPoolArray::get(cast<ArrayType>(CPA->getType()), Operands);
+ } else if (ConstPoolStruct *CPS = dyn_cast<ConstPoolStruct>(CPV)) {
+ const vector<Use> &Ops = CPS->getValues();
+ vector<ConstPoolVal*> Operands(Ops.size());
+ for (unsigned i = 0; i < Ops.size(); ++i)
+ Operands[i] =
+ cast<ConstPoolVal>(RemapOperand(Ops[i], LocalMap, GlobalMap));
+ Result = ConstPoolStruct::get(cast<StructType>(CPS->getType()), Operands);
+ } else if (isa<ConstPoolPointerNull>(CPV)) {
+ Result = CPV;
+ } else if (ConstPoolPointerReference *CPR =
+ dyn_cast<ConstPoolPointerReference>(CPV)) {
+ Value *V = RemapOperand(CPR->getValue(), LocalMap, GlobalMap);
+ Result = ConstPoolPointerReference::get(cast<GlobalValue>(V));
+ } else {
+ assert(0 && "Unknown type of derived type constant value!");
+ }
+
+ // Cache the mapping in our local map structure...
+ LocalMap.insert(make_pair(In, CPV));
+ return Result;
+ }
+
+ cerr << "Couldn't remap value: " << In << endl;
+ assert(0 && "Couldn't remap value!");
+ return 0;
}
// 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 *GV = *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 (GV->hasName() && (V = ST->lookup(GV->getType(), GV->getName()))) {
+ if (SGV->hasName() && (V = ST->lookup(SGV->getType(), SGV->getName()))) {
// The 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 Methods,
// and they both have distinct, nonoverlapping, possible types.
GlobalVariable *DGV = cast<GlobalVariable>(V);
// Check to see if the two GV's have the same Const'ness...
- if (GV->isConstant() != DGV->isConstant())
+ if (SGV->isConstant() != DGV->isConstant())
return Error(Err, "Global Variable Collision on '" +
- GV->getType()->getDescription() + "':%" + GV->getName() +
+ SGV->getType()->getDescription() + "':%" + SGV->getName() +
" - Global variables differ in const'ness");
- // Check to make sure that they both have the same initializer if they are
- // both initialized...
- //
- // TODO: Check to see if they have DEEP equality. For Module level constants
- if (GV->hasInitializer() && DGV->hasInitializer() &&
- GV->getInitializer() != DGV->getInitializer())
- return Error(Err, "Global Variable Collision on '" +
- GV->getType()->getDescription() + "':%" + GV->getName() +
- " - Global variables have different initializers");
-
- // Okay, everything is cool, remember the mapping and update the
- // initializer if neccesary...
- //
-// TODO: We might have to map module level constants here!
- if (GV->hasInitializer() && !DGV->hasInitializer())
- DGV->setInitializer(GV->getInitializer());
-
- ValueMap.insert(make_pair(GV, DGV));
+ // Okay, everything is cool, remember the mapping...
+ ValueMap.insert(make_pair(SGV, DGV));
} else {
// No linking to be performed, simply create an identical version of the
- // symbol over in the dest module...
-// TODO: Provide constpoolval mapping for initializer if using module local
-// initializers!
- GlobalVariable *NGV =
- new GlobalVariable(GV->getType()->getValueType(), GV->isConstant(),
- GV->hasInitializer() ? GV->getInitializer() : 0,
- GV->getName());
+ // symbol over in the dest module... the initializer will be filled in
+ // later by LinkGlobalInits...
+ //
+ GlobalVariable *DGV =
+ new GlobalVariable(SGV->getType()->getValueType(), SGV->isConstant(),
+ 0, SGV->getName());
// Add the new global to the dest module
- Dest->getGlobalList().push_back(NGV);
+ Dest->getGlobalList().push_back(DGV);
// Make sure to remember this mapping...
- ValueMap.insert(make_pair(GV, NGV));
+ ValueMap.insert(make_pair(SGV, DGV));
}
}
return false;
}
+// LinkGlobalInits - Update the initializers in the Dest module now that all
+// globals that may be referenced are in Dest.
+//
+static bool LinkGlobalInits(Module *Dest, const Module *Src,
+ map<const Value*, Value*> &ValueMap,
+ string *Err = 0) {
+
+ // 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;
+
+ if (SGV->hasInitializer()) { // Only process initialized GV's
+ // Figure out what the initializer looks like in the dest module...
+ ConstPoolVal *DInit =
+ cast<ConstPoolVal>(RemapOperand(SGV->getInitializer(), ValueMap));
+
+ GlobalVariable *DGV = cast<GlobalVariable>(ValueMap[SGV]);
+ if (DGV->hasInitializer()) {
+ if (DGV->getInitializer() != DInit)
+ return Error(Err, "Global Variable Collision on '" +
+ SGV->getType()->getDescription() + "':%" +SGV->getName()+
+ " - Global variables have different initializers");
+ } else {
+ // Copy the initializer over now...
+ DGV->setInitializer(DInit);
+ }
+ }
+ }
+ return false;
+}
// LinkMethodProtos - Link the methods together between the two modules, without
// doing method bodies... this just adds external method prototypes to the Dest
//
map<const Value*, Value*> ValueMap;
- // Link the globals variables together between the two modules...
+ // Insert all of the globals in src into the Dest module... without
+ // initializers
if (LinkGlobals(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
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