void PIC16AsmPrinter::EmitUnInitData (Module &M)
{
SwitchToSection(TAI->getBSSSection_());
const TargetData *TD = TM.getTargetData();
for (Module::global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I) {
if (!I->hasInitializer()) // External global require no code.
continue;
Constant *C = I->getInitializer();
if (C->isNullValue()) {
if (EmitSpecialLLVMGlobal(I))
continue;
// Any variables reaching here with "." in its name is a local scope
// variable and should not be printed in global data section.
std::string name = Mang->getValueName(I);
if (name.find(".") != std::string::npos)
continue;
I->setSection(TAI->getBSSSection_()->getName());
const Type *Ty = C->getType();
unsigned Size = TD->getTypePaddedSize(Ty);
O << name << " " <<"RES"<< " " << Size ;
O << "\n";
}
}
}
void PIC16AsmPrinter::EmitRomData (Module &M)
{
SwitchToSection(TAI->getReadOnlySection());
IsRomData = true;
for (Module::global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I) {
if (!I->hasInitializer()) // External global require no code.
continue;
Constant *C = I->getInitializer();
const PointerType *PtrTy = I->getType();
int AddrSpace = PtrTy->getAddressSpace();
if ((!C->isNullValue()) && (AddrSpace == PIC16ISD::ROM_SPACE)) {
if (EmitSpecialLLVMGlobal(I))
continue;
// Any variables reaching here with "." in its name is a local scope
// variable and should not be printed in global data section.
std::string name = Mang->getValueName(I);
if (name.find(".") != std::string::npos)
continue;
I->setSection(TAI->getReadOnlySection()->getName());
O << name;
EmitGlobalConstant(C, AddrSpace);
O << "\n";
}
}
IsRomData = false;
}
/// doInitialization - Perfrom Module level initializations here.
/// One task that we do here is to sectionize all global variables.
/// The MemSelOptimizer pass depends on the sectionizing.
///
bool PIC16AsmPrinter::doInitialization(Module &M) {
bool Result = AsmPrinter::doInitialization(M);
// FIXME:: This is temporary solution to generate the include file.
// The processor should be passed to llc as in input and the header file
// should be generated accordingly.
O << "\n\t#include P16F1937.INC\n";
// Set the section names for all globals.
for (Module::global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I)
if (!I->isDeclaration() && !I->hasAvailableExternallyLinkage()) {
const MCSection *S = getObjFileLowering().SectionForGlobal(I, Mang, TM);
I->setSection(((const MCSectionPIC16*)S)->getName());
}
DbgInfo.BeginModule(M);
EmitFunctionDecls(M);
EmitUndefinedVars(M);
EmitDefinedVars(M);
EmitIData(M);
EmitUData(M);
EmitRomData(M);
return Result;
}
bool PIC16AsmPrinter::doInitialization (Module &M) {
bool Result = AsmPrinter::doInitialization(M);
DbgInfo.EmitFileDirective(M);
// FIXME:: This is temporary solution to generate the include file.
// The processor should be passed to llc as in input and the header file
// should be generated accordingly.
O << "\n\t#include P16F1937.INC\n";
MachineModuleInfo *MMI = getAnalysisIfAvailable<MachineModuleInfo>();
assert(MMI);
DwarfWriter *DW = getAnalysisIfAvailable<DwarfWriter>();
assert(DW && "Dwarf Writer is not available");
DW->BeginModule(&M, MMI, O, this, TAI);
// Set the section names for all globals.
for (Module::global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I) {
I->setSection(TAI->SectionForGlobal(I)->getName());
}
EmitFunctionDecls(M);
EmitUndefinedVars(M);
EmitDefinedVars(M);
EmitIData(M);
EmitUData(M);
EmitRomData(M);
DbgInfo.PopulateFunctsDI(M);
return Result;
}
void PIC16AsmPrinter::emitFunctionData(MachineFunction &MF) {
const Function *F = MF.getFunction();
std::string FuncName = Mang->getValueName(F);
Module *M = const_cast<Module *>(F->getParent());
const TargetData *TD = TM.getTargetData();
unsigned FrameSize = 0;
// Emit the data section name.
O << "\n";
std::string SectionName = "fdata." + CurrentFnName + ".# " + "UDATA";
const Section *fDataSection = TAI->getNamedSection(SectionName.c_str(),
SectionFlags::Writeable);
SwitchToSection(fDataSection);
//Emit function return value.
O << CurrentFnName << ".retval:\n";
const Type *RetType = F->getReturnType();
unsigned RetSize = 0;
if (RetType->getTypeID() != Type::VoidTyID)
RetSize = TD->getTypePaddedSize(RetType);
// Emit function arguments.
O << CurrentFnName << ".args:\n";
// Emit the function variables.
// In PIC16 all the function arguments and local variables are global.
// Therefore to get the variable belonging to this function entire
// global list will be traversed and variables belonging to this function
// will be emitted in the current data section.
for (Module::global_iterator I = M->global_begin(), E = M->global_end();
I != E; ++I) {
std::string VarName = Mang->getValueName(I);
// The variables of a function are of form FuncName.* . If this variable
// does not belong to this function then continue.
// Static local varilabes of a function does not have .auto. in their
// name. They are not printed as part of function data but module
// level global data.
if (! isLocalToFunc(FuncName, VarName))
continue;
I->setSection("fdata." + CurrentFnName + ".#");
Constant *C = I->getInitializer();
const Type *Ty = C->getType();
unsigned Size = TD->getTypePaddedSize(Ty);
FrameSize += Size;
// Emit memory reserve directive.
O << VarName << " RES " << Size << "\n";
}
// Return value can not overlap with temp data, becasue a temp slot
// may be read/written after a return value is calculated and saved
// within the function.
if (RetSize > FrameSize)
O << CurrentFnName << ".dummy" << " RES " << (RetSize - FrameSize) << "\n";
emitFunctionTempData(MF, FrameSize);
}
/// doInitialization - Perform Module level initializations here.
/// One task that we do here is to sectionize all global variables.
/// The MemSelOptimizer pass depends on the sectionizing.
///
bool PIC16AsmPrinter::doInitialization(Module &M) {
bool Result = AsmPrinter::doInitialization(M);
// Every asmbly contains these std headers.
O << "\n#include p16f1xxx.inc";
O << "\n#include stdmacros.inc";
// Set the section names for all globals.
for (Module::global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I) {
// Record External Var Decls.
if (I->isDeclaration()) {
ExternalVarDecls.push_back(I);
continue;
}
// Record Exteranl Var Defs.
if (I->hasExternalLinkage() || I->hasCommonLinkage()) {
ExternalVarDefs.push_back(I);
}
// Sectionify actual data.
if (!I->hasAvailableExternallyLinkage()) {
const MCSection *S = getObjFileLowering().SectionForGlobal(I, Mang, TM);
I->setSection(((const PIC16Section *)S)->getName());
}
}
DbgInfo.BeginModule(M);
EmitFunctionDecls(M);
EmitUndefinedVars(M);
EmitDefinedVars(M);
EmitIData(M);
EmitUData(M);
EmitRomData(M);
EmitSharedUdata(M);
EmitUserSections(M);
return Result;
}