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Iterate over globals once and sectionize them into appropriate sections.
Later in asmprinter, go over thsese sections and print them. Do not print empty sections. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71560 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -164,7 +164,6 @@ void PIC16AsmPrinter::printDecls(void) {
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for (std::list<const char*>::const_iterator I = Decls.begin();
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I != Decls.end(); I++) {
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O << TAI->getExternDirective() << *I << "\n";
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// FIXME: Use PAN::getXXXLabel() funtions hrer.
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O << TAI->getExternDirective() << PAN::getArgsLabel(*I) << "\n";
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O << TAI->getExternDirective() << PAN::getRetvalLabel(*I) << "\n";
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}
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@ -183,8 +182,16 @@ bool PIC16AsmPrinter::doInitialization (Module &M) {
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assert(DW && "Dwarf Writer is not available");
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DW->BeginModule(&M, MMI, O, this, TAI);
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// Set the section names for all globals.
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for (Module::global_iterator I = M.global_begin(), E = M.global_end();
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I != E; ++I) {
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I->setSection(TAI->SectionForGlobal(I)->getName());
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}
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EmitExternsAndGlobals (M);
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EmitGlobalData(M);
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EmitIData(M);
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EmitUData(M);
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EmitAutos(M);
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EmitRomData(M);
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return Result;
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}
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@ -238,31 +245,19 @@ void PIC16AsmPrinter::EmitExternsAndGlobals (Module &M) {
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void PIC16AsmPrinter::EmitRomData (Module &M)
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{
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SwitchToSection(TAI->getReadOnlySection());
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for (Module::global_iterator I = M.global_begin(), E = M.global_end();
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I != E; ++I) {
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if (!I->hasInitializer()) // External global require no code.
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continue;
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const PIC16TargetAsmInfo *PTAI = static_cast<const PIC16TargetAsmInfo *>(TAI);
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Constant *C = I->getInitializer();
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const PointerType *PtrTy = I->getType();
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int AddrSpace = PtrTy->getAddressSpace();
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if ((!C->isNullValue()) && (AddrSpace == PIC16ISD::ROM_SPACE)) {
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std::vector<const GlobalVariable*> Items = PTAI->ROSection->Items;
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if (! Items.size()) return;
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if (EmitSpecialLLVMGlobal(I))
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continue;
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// Any variables reaching here with "." in its name is a local scope
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// variable and should not be printed in global data section.
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std::string name = Mang->getValueName(I);
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if (PAN::isLocalName(name))
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continue;
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I->setSection(TAI->getReadOnlySection()->getName());
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O << name;
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EmitGlobalConstant(C, AddrSpace);
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O << "\n";
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}
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// Print ROData ection.
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O << "\n";
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SwitchToSection(PTAI->ROSection->S_);
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for (unsigned j = 0; j < Items.size(); j++) {
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O << Mang->getValueName(Items[j]);
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Constant *C = Items[j]->getInitializer();
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int AddrSpace = Items[j]->getType()->getAddressSpace();
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EmitGlobalConstant(C, AddrSpace);
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}
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}
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@ -276,9 +271,7 @@ bool PIC16AsmPrinter::doFinalization(Module &M) {
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void PIC16AsmPrinter::emitFunctionData(MachineFunction &MF) {
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const Function *F = MF.getFunction();
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std::string FuncName = Mang->getValueName(F);
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Module *M = const_cast<Module *>(F->getParent());
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const TargetData *TD = TM.getTargetData();
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unsigned FrameSize = 0;
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// Emit the data section name.
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O << "\n";
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const char *SectionName = PAN::getFrameSectionName(CurrentFnName).c_str();
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@ -318,57 +311,15 @@ void PIC16AsmPrinter::emitFunctionData(MachineFunction &MF) {
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int TempSize = PTLI->GetTmpSize();
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if (TempSize > 0 )
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O << PAN::getTempdataLabel(CurrentFnName) << " RES " << TempSize <<"\n";
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// Emit the section name for local variables.
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O << "\n";
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const char* SecNameLocals = PAN::getAutosSectionName(CurrentFnName).c_str() ;
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const Section *fADataSection = TAI->getNamedSection(SecNameLocals,
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SectionFlags::Writeable);
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SwitchToSection(fADataSection);
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// Emit the function variables.
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// In PIC16 all the function arguments and local variables are global.
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// Therefore to get the variable belonging to this function entire
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// global list will be traversed and variables belonging to this function
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// will be emitted in the current data section.
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for (Module::global_iterator I = M->global_begin(), E = M->global_end();
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I != E; ++I) {
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std::string VarName = Mang->getValueName(I);
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// The variables of a function are of form FuncName.* . If this variable
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// does not belong to this function then continue.
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// Static local varilabes of a function does not have .auto. in their
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// name. They are not printed as part of function data but module
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// level global data.
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if (! PAN::isLocalToFunc(FuncName, VarName))
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continue;
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I->setSection(TAI->SectionForGlobal(I)->getName());
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Constant *C = I->getInitializer();
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const Type *Ty = C->getType();
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unsigned Size = TD->getTypeAllocSize(Ty);
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FrameSize += Size;
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// Emit memory reserve directive.
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O << VarName << " RES " << Size << "\n";
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}
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}
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void PIC16AsmPrinter::EmitGlobalData (Module &M)
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{
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// Set the section names for all globals.
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for (Module::global_iterator I = M.global_begin(), E = M.global_end();
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I != E; ++I) {
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I->setSection(TAI->SectionForGlobal(I)->getName());
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}
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void PIC16AsmPrinter::EmitIData (Module &M) {
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const PIC16TargetAsmInfo *PTAI = static_cast<const PIC16TargetAsmInfo *>(TAI);
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const TargetData *TD = TM.getTargetData();
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// Now print all IDATA sections.
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// Print all IDATA sections.
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std::vector <PIC16Section *>IDATASections = PTAI->IDATASections;
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for (unsigned i = 0; i < IDATASections.size(); i++) {
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O << "\n";
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SwitchToSection(IDATASections[i]->S_);
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std::vector<const GlobalVariable*> Items = IDATASections[i]->Items;
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for (unsigned j = 0; j < Items.size(); j++) {
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@ -379,10 +330,16 @@ void PIC16AsmPrinter::EmitGlobalData (Module &M)
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EmitGlobalConstant(C, AddrSpace);
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}
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}
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}
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// Now print all BSS sections.
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void PIC16AsmPrinter::EmitUData (Module &M) {
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const PIC16TargetAsmInfo *PTAI = static_cast<const PIC16TargetAsmInfo *>(TAI);
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const TargetData *TD = TM.getTargetData();
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// Print all BSS sections.
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std::vector <PIC16Section *>BSSSections = PTAI->BSSSections;
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for (unsigned i = 0; i < BSSSections.size(); i++) {
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O << "\n";
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SwitchToSection(BSSSections[i]->S_);
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std::vector<const GlobalVariable*> Items = BSSSections[i]->Items;
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for (unsigned j = 0; j < Items.size(); j++) {
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@ -397,3 +354,26 @@ void PIC16AsmPrinter::EmitGlobalData (Module &M)
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}
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}
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void PIC16AsmPrinter::EmitAutos (Module &M)
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{
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// Section names for all globals are already set.
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const PIC16TargetAsmInfo *PTAI = static_cast<const PIC16TargetAsmInfo *>(TAI);
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const TargetData *TD = TM.getTargetData();
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// Now print all Autos sections.
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std::vector <PIC16Section *>AutosSections = PTAI->AutosSections;
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for (unsigned i = 0; i < AutosSections.size(); i++) {
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O << "\n";
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SwitchToSection(AutosSections[i]->S_);
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std::vector<const GlobalVariable*> Items = AutosSections[i]->Items;
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for (unsigned j = 0; j < Items.size(); j++) {
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std::string VarName = Mang->getValueName(Items[j]);
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Constant *C = Items[j]->getInitializer();
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const Type *Ty = C->getType();
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unsigned Size = TD->getTypeAllocSize(Ty);
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// Emit memory reserve directive.
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O << VarName << " RES " << Size << "\n";
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}
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}
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}
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@ -43,7 +43,9 @@ namespace llvm {
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bool printInstruction(const MachineInstr *MI); // definition autogenerated.
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bool printMachineInstruction(const MachineInstr *MI);
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void EmitExternsAndGlobals (Module &M);
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void EmitGlobalData (Module &M);
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void EmitIData (Module &M);
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void EmitUData (Module &M);
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void EmitAutos (Module &M);
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void EmitRomData (Module &M);
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void emitFunctionData(MachineFunction &MF);
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void printDecls(void);
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@ -44,6 +44,7 @@ PIC16TargetAsmInfo(const PIC16TargetMachine &TM)
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// Need because otherwise a .text symbol is emitted by DwarfWriter
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// in BeginModule, and gpasm cribbs for that .text symbol.
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TextSection = getUnnamedSection("", SectionFlags::Code);
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ROSection = new PIC16Section(getReadOnlySection());
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}
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const char *PIC16TargetAsmInfo::getRomDirective(unsigned size) const
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@ -154,6 +155,40 @@ PIC16TargetAsmInfo::getIDATASectionForGlobal(const GlobalVariable *GV) const {
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return FoundIDATA->S_;
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}
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// Get the section for an automatic variable of a function.
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// For PIC16 they are globals only with mangled names.
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const Section *
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PIC16TargetAsmInfo::getSectionForAuto(const GlobalVariable *GV) const {
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const std::string name = PAN::getSectionNameForSym(GV->getName());
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// Go through all Auto Sections and assign this variable
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// to the appropriate section.
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PIC16Section *FoundAutoSec = NULL;
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for (unsigned i = 0; i < AutosSections.size(); i++) {
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if ( AutosSections[i]->S_->getName() == name) {
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FoundAutoSec = AutosSections[i];
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break;
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}
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}
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// No Auto section was found. Crate a new one.
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if (! FoundAutoSec) {
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const Section *NewSection = getNamedSection (name.c_str());
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FoundAutoSec = new PIC16Section(NewSection);
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// Add this newly created autos section to the list of AutosSections.
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AutosSections.push_back(FoundAutoSec);
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}
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// Insert the auto into this section.
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FoundAutoSec->Items.push_back(GV);
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return FoundAutoSec->S_;
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}
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// Override default implementation to put the true globals into
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// multiple data sections if required.
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const Section*
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@ -168,8 +203,7 @@ PIC16TargetAsmInfo::SelectSectionForGlobal(const GlobalValue *GV1) const {
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// name for it and return.
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const std::string name = GV->getName();
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if (PAN::isLocalName(name)) {
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const std::string Sec_Name = PAN::getSectionNameForSym(name);
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return getNamedSection(Sec_Name.c_str());
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return getSectionForAuto(GV);
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}
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// See if this is an uninitialized global.
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@ -177,11 +211,16 @@ PIC16TargetAsmInfo::SelectSectionForGlobal(const GlobalValue *GV1) const {
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if (C->isNullValue())
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return getBSSSectionForGlobal(GV);
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// This is initialized data. We only deal with initialized data in RAM.
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// If this is initialized data in RAM. Put it in the correct IDATA section.
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if (GV->getType()->getAddressSpace() == PIC16ISD::RAM_SPACE)
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return getIDATASectionForGlobal(GV);
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// This is initialized data in rom, put it in the readonly section.
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if (GV->getType()->getAddressSpace() == PIC16ISD::ROM_SPACE) {
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ROSection->Items.push_back(GV);
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return ROSection->S_;
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}
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// Else let the default implementation take care of it.
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return TargetAsmInfo::SelectSectionForGlobal(GV);
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}
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@ -195,4 +234,10 @@ PIC16TargetAsmInfo::~PIC16TargetAsmInfo() {
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for (unsigned i = 0; i < IDATASections.size(); i++) {
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delete IDATASections[i];
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}
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for (unsigned i = 0; i < AutosSections.size(); i++) {
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delete AutosSections[i];
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}
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delete ROSection;
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}
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@ -43,6 +43,8 @@ namespace llvm {
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PIC16TargetAsmInfo(const PIC16TargetMachine &TM);
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mutable std::vector<PIC16Section *> BSSSections;
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mutable std::vector<PIC16Section *> IDATASections;
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mutable std::vector<PIC16Section *> AutosSections;
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mutable PIC16Section *ROSection;
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virtual ~PIC16TargetAsmInfo();
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private:
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@ -53,6 +55,7 @@ namespace llvm {
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virtual const char *getASDirective(unsigned size, unsigned AS) const;
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const Section *getBSSSectionForGlobal(const GlobalVariable *GV) const;
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const Section *getIDATASectionForGlobal(const GlobalVariable *GV) const;
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const Section *getSectionForAuto(const GlobalVariable *GV) const;
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virtual const Section *SelectSectionForGlobal(const GlobalValue *GV) const;
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public:
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void SetSectionForGVs(Module &M);
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@ -62,6 +65,9 @@ namespace llvm {
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std::vector<PIC16Section *> getIDATASections() const {
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return IDATASections;
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}
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std::vector<PIC16Section *> getAutosSections() const {
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return AutosSections;
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}
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};
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} // namespace llvm
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