/// Emit extern decls for functions imported from other modules, and emit
/// global declarations for function defined in this module and which are
/// available to other modules.
///
void PIC16AsmPrinter::EmitFunctionDecls(Module &M) {
// Emit declarations for external functions.
O <<"\n"<<TAI->getCommentString() << "Function Declarations - BEGIN." <<"\n";
for (Module::iterator I = M.begin(), E = M.end(); I != E; I++) {
if (I->isIntrinsic())
continue;
std::string Name = Mang->getMangledName(I);
if (Name.compare("@abort") == 0)
continue;
if (!I->isDeclaration() && !I->hasExternalLinkage())
continue;
// Do not emit memcpy, memset, and memmove here.
// Calls to these routines can be generated in two ways,
// 1. User calling the standard lib function
// 2. Codegen generating these calls for llvm intrinsics.
// In the first case a prototype is alread availale, while in
// second case the call is via and externalsym and the prototype is missing.
// So declarations for these are currently always getting printing by
// tracking both kind of references in printInstrunction.
if (I->isDeclaration() && PAN::isMemIntrinsic(Name)) continue;
const char *directive = I->isDeclaration() ? TAI->getExternDirective() :
TAI->getGlobalDirective();
O << directive << Name << "\n";
O << directive << PAN::getRetvalLabel(Name) << "\n";
O << directive << PAN::getArgsLabel(Name) << "\n";
}
O << TAI->getCommentString() << "Function Declarations - END." <<"\n";
}
// Emit extern decls for functions imported from other modules, and emit
// global declarations for function defined in this module and which are
// available to other modules.
void PIC16AsmPrinter::EmitFunctionDecls (Module &M) {
// Emit declarations for external functions.
O << TAI->getCommentString() << "Function Declarations - BEGIN." <<"\n";
for (Module::iterator I = M.begin(), E = M.end(); I != E; I++) {
std::string Name = Mang->getValueName(I);
if (Name.compare("@abort") == 0)
continue;
// If it is llvm intrinsic call then don't emit
if (Name.find("llvm.") != std::string::npos)
continue;
if (! (I->isDeclaration() || I->hasExternalLinkage()))
continue;
const char *directive = I->isDeclaration() ? TAI->getExternDirective() :
TAI->getGlobalDirective();
O << directive << Name << "\n";
O << directive << PAN::getRetvalLabel(Name) << "\n";
O << directive << PAN::getArgsLabel(Name) << "\n";
}
O << TAI->getCommentString() << "Function Declarations - END." <<"\n";
}
bool MergeFunctions::runOnModule(Module &M) {
bool Changed = false;
std::map<unsigned long, std::vector<Function *> > FnMap;
for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) {
if (F->isDeclaration() || F->isIntrinsic())
continue;
if (!F->hasLocalLinkage() && !F->hasExternalLinkage() &&
!F->hasWeakLinkage())
continue;
if (hasAddressTaken(F))
continue;
FnMap[hash(F)].push_back(F);
}
// TODO: instead of running in a loop, we could also fold functions in callgraph
// order. Constructing the CFG probably isn't cheaper than just running in a loop.
bool LocalChanged;
do {
LocalChanged = false;
for (std::map<unsigned long, std::vector<Function *> >::iterator
I = FnMap.begin(), E = FnMap.end(); I != E; ++I) {
DOUT << "size: " << FnMap.size() << "\n";
std::vector<Function *> &FnVec = I->second;
DOUT << "hash (" << I->first << "): " << FnVec.size() << "\n";
for (int i = 0, e = FnVec.size(); i != e; ++i) {
for (int j = i + 1; j != e; ++j) {
bool isEqual = equals(FnVec[i], FnVec[j]);
DOUT << " " << FnVec[i]->getName()
<< (isEqual ? " == " : " != ")
<< FnVec[j]->getName() << "\n";
if (isEqual) {
if (fold(FnVec, i, j)) {
LocalChanged = true;
FnVec.erase(FnVec.begin() + j);
--j, --e;
}
}
}
}
}
Changed |= LocalChanged;
} while (LocalChanged);
return Changed;
}
/* Change linkages of global values, in order to
* improve alias analysis.
*/
bool DeadStoreEliminationPass::changeLinkageTypes(Module &M) {
DEBUG(errs() << "Changing linkages to private...\n");
for (Module::global_iterator git = M.global_begin(), gitE = M.global_end();
git != gitE; ++git) {
DEBUG(errs() << " " << *git << "\n");
if (!git->hasExternalLinkage() && !git->hasAppendingLinkage()) git->setLinkage(GlobalValue::PrivateLinkage);
}
for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) {
if (!F->isDeclaration()) {
if (!F->hasExternalLinkage() && !F->hasAppendingLinkage()) F->setLinkage(GlobalValue::PrivateLinkage);
DEBUG(errs() << " " << F->getName() << "\n");
}
}
DEBUG(errs() << "\n");
return true;
}
void PIC16AsmPrinter::EmitExternsAndGlobals (Module &M) {
// Emit declarations for external functions.
O << "section.0" <<"\n";
for (Module::iterator I = M.begin(), E = M.end(); I != E; I++) {
std::string Name = Mang->getValueName(I);
if (Name.compare("abort") == 0)
continue;
if (I->isDeclaration()) {
O << "\textern " <<Name << "\n";
O << "\textern " << Name << ".retval\n";
O << "\textern " << Name << ".args\n";
}
else if (I->hasExternalLinkage()) {
O << "\tglobal " << Name << "\n";
O << "\tglobal " << Name << ".retval\n";
O << "\tglobal " << Name << ".args\n";
}
}
// Emit header file to include declaration of library functions
O << "\t#include C16IntrinsicCalls.INC\n";
// Emit declarations for external globals.
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
I != E; I++) {
// Any variables reaching here with ".auto." in its name is a local scope
// variable and should not be printed in global data section.
std::string Name = Mang->getValueName(I);
if (isLocalName (Name))
continue;
if (I->isDeclaration())
O << "\textern "<< Name << "\n";
else if (I->hasCommonLinkage() || I->hasExternalLinkage())
O << "\tglobal "<< Name << "\n";
}
}