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diff --git a/lib/Target/PIC16/AsmPrinter/PIC16AsmPrinter.cpp b/lib/Target/PIC16/AsmPrinter/PIC16AsmPrinter.cpp
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+++ b/lib/Target/PIC16/AsmPrinter/PIC16AsmPrinter.cpp
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+//===-- PIC16AsmPrinter.cpp - PIC16 LLVM assembly writer ------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains a printer that converts from our internal representation
+// of machine-dependent LLVM code to PIC16 assembly language.
+//
+//===----------------------------------------------------------------------===//
+
+#include "PIC16AsmPrinter.h"
+#include "MCSectionPIC16.h"
+#include "PIC16MCAsmInfo.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Function.h"
+#include "llvm/Module.h"
+#include "llvm/CodeGen/DwarfWriter.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/DwarfWriter.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/Target/TargetRegistry.h"
+#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/FormattedStream.h"
+#include "llvm/Support/Mangler.h"
+#include <cstring>
+using namespace llvm;
+
+#include "PIC16GenAsmWriter.inc"
+
+PIC16AsmPrinter::PIC16AsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
+ const MCAsmInfo *T, bool V)
+: AsmPrinter(O, TM, T, V), DbgInfo(O, T) {
+ PTLI = static_cast<PIC16TargetLowering*>(TM.getTargetLowering());
+ PMAI = static_cast<const PIC16MCAsmInfo*>(T);
+ PTOF = (PIC16TargetObjectFile*)&PTLI->getObjFileLowering();
+}
+
+bool PIC16AsmPrinter::printMachineInstruction(const MachineInstr *MI) {
+ processDebugLoc(MI, true);
+ printInstruction(MI);
+ if (VerboseAsm && !MI->getDebugLoc().isUnknown())
+ EmitComments(*MI);
+ O << '\n';
+ processDebugLoc(MI, false);
+ return true;
+}
+
+/// runOnMachineFunction - This emits the frame section, autos section and
+/// assembly for each instruction. Also takes care of function begin debug
+/// directive and file begin debug directive (if required) for the function.
+///
+bool PIC16AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
+ this->MF = &MF;
+
+ // This calls the base class function required to be called at beginning
+ // of runOnMachineFunction.
+ SetupMachineFunction(MF);
+
+ // Get the mangled name.
+ const Function *F = MF.getFunction();
+ CurrentFnName = Mang->getMangledName(F);
+
+ // Emit the function frame (args and temps).
+ EmitFunctionFrame(MF);
+
+ DbgInfo.BeginFunction(MF);
+
+ // Emit the autos section of function.
+ EmitAutos(CurrentFnName);
+
+ // Now emit the instructions of function in its code section.
+ const MCSection *fCodeSection =
+ getObjFileLowering().getSectionForFunction(CurrentFnName);
+ // Start the Code Section.
+ O << "\n";
+ OutStreamer.SwitchSection(fCodeSection);
+
+ // Emit the frame address of the function at the beginning of code.
+ O << "\tretlw low(" << PAN::getFrameLabel(CurrentFnName) << ")\n";
+ O << "\tretlw high(" << PAN::getFrameLabel(CurrentFnName) << ")\n";
+
+ // Emit function start label.
+ O << CurrentFnName << ":\n";
+
+ DebugLoc CurDL;
+ O << "\n";
+ // Print out code for the function.
+ for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
+ I != E; ++I) {
+
+ // Print a label for the basic block.
+ if (I != MF.begin()) {
+ EmitBasicBlockStart(I);
+ }
+
+ // Print a basic block.
+ for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
+ II != E; ++II) {
+
+ // Emit the line directive if source line changed.
+ const DebugLoc DL = II->getDebugLoc();
+ if (!DL.isUnknown() && DL != CurDL) {
+ DbgInfo.ChangeDebugLoc(MF, DL);
+ CurDL = DL;
+ }
+
+ // Print the assembly for the instruction.
+ printMachineInstruction(II);
+ }
+ }
+
+ // Emit function end debug directives.
+ DbgInfo.EndFunction(MF);
+
+ return false; // we didn't modify anything.
+}
+
+
+// printOperand - print operand of insn.
+void PIC16AsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
+ const MachineOperand &MO = MI->getOperand(opNum);
+
+ switch (MO.getType()) {
+ case MachineOperand::MO_Register:
+ O << getRegisterName(MO.getReg());
+ return;
+
+ case MachineOperand::MO_Immediate:
+ O << (int)MO.getImm();
+ return;
+
+ case MachineOperand::MO_GlobalAddress: {
+ std::string Sname = Mang->getMangledName(MO.getGlobal());
+ // FIXME: currently we do not have a memcpy def coming in the module
+ // by any chance, as we do not link in those as .bc lib. So these calls
+ // are always external and it is safe to emit an extern.
+ if (PAN::isMemIntrinsic(Sname)) {
+ LibcallDecls.push_back(createESName(Sname));
+ }
+
+ O << Sname;
+ break;
+ }
+ case MachineOperand::MO_ExternalSymbol: {
+ const char *Sname = MO.getSymbolName();
+
+ // If its a libcall name, record it to decls section.
+ if (PAN::getSymbolTag(Sname) == PAN::LIBCALL) {
+ LibcallDecls.push_back(Sname);
+ }
+
+ // Record a call to intrinsic to print the extern declaration for it.
+ std::string Sym = Sname;
+ if (PAN::isMemIntrinsic(Sym)) {
+ Sym = PAN::addPrefix(Sym);
+ LibcallDecls.push_back(createESName(Sym));
+ }
+
+ O << Sym;
+ break;
+ }
+ case MachineOperand::MO_MachineBasicBlock:
+ GetMBBSymbol(MO.getMBB()->getNumber())->print(O, MAI);
+ return;
+
+ default:
+ llvm_unreachable(" Operand type not supported.");
+ }
+}
+
+/// printCCOperand - Print the cond code operand.
+///
+void PIC16AsmPrinter::printCCOperand(const MachineInstr *MI, int opNum) {
+ int CC = (int)MI->getOperand(opNum).getImm();
+ O << PIC16CondCodeToString((PIC16CC::CondCodes)CC);
+}
+
+// This function is used to sort the decls list.
+// should return true if s1 should come before s2.
+static bool is_before(const char *s1, const char *s2) {
+ return strcmp(s1, s2) <= 0;
+}
+
+// This is used by list::unique below.
+// unique will filter out duplicates if it knows them.
+static bool is_duplicate(const char *s1, const char *s2) {
+ return !strcmp(s1, s2);
+}
+
+/// printLibcallDecls - print the extern declarations for compiler
+/// intrinsics.
+///
+void PIC16AsmPrinter::printLibcallDecls() {
+ // If no libcalls used, return.
+ if (LibcallDecls.empty()) return;
+
+ O << MAI->getCommentString() << "External decls for libcalls - BEGIN." <<"\n";
+ // Remove duplicate entries.
+ LibcallDecls.sort(is_before);
+ LibcallDecls.unique(is_duplicate);
+
+ for (std::list<const char*>::const_iterator I = LibcallDecls.begin();
+ I != LibcallDecls.end(); I++) {
+ O << MAI->getExternDirective() << *I << "\n";
+ O << MAI->getExternDirective() << PAN::getArgsLabel(*I) << "\n";
+ O << MAI->getExternDirective() << PAN::getRetvalLabel(*I) << "\n";
+ }
+ O << MAI->getCommentString() << "External decls for libcalls - END." <<"\n";
+}
+
+/// 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);
+
+ // 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;
+}
+
+/// 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"<<MAI->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() ? MAI->getExternDirective() :
+ MAI->getGlobalDirective();
+
+ O << directive << Name << "\n";
+ O << directive << PAN::getRetvalLabel(Name) << "\n";
+ O << directive << PAN::getArgsLabel(Name) << "\n";
+ }
+
+ O << MAI->getCommentString() << "Function Declarations - END." <<"\n";
+}
+
+// Emit variables imported from other Modules.
+void PIC16AsmPrinter::EmitUndefinedVars(Module &M) {
+ std::vector<const GlobalVariable*> Items = PTOF->ExternalVarDecls->Items;
+ if (!Items.size()) return;
+
+ O << "\n" << MAI->getCommentString() << "Imported Variables - BEGIN" << "\n";
+ for (unsigned j = 0; j < Items.size(); j++) {
+ O << MAI->getExternDirective() << Mang->getMangledName(Items[j]) << "\n";
+ }
+ O << MAI->getCommentString() << "Imported Variables - END" << "\n";
+}
+
+// Emit variables defined in this module and are available to other modules.
+void PIC16AsmPrinter::EmitDefinedVars(Module &M) {
+ std::vector<const GlobalVariable*> Items = PTOF->ExternalVarDefs->Items;
+ if (!Items.size()) return;
+
+ O << "\n" << MAI->getCommentString() << "Exported Variables - BEGIN" << "\n";
+ for (unsigned j = 0; j < Items.size(); j++) {
+ O << MAI->getGlobalDirective() << Mang->getMangledName(Items[j]) << "\n";
+ }
+ O << MAI->getCommentString() << "Exported Variables - END" << "\n";
+}
+
+// Emit initialized data placed in ROM.
+void PIC16AsmPrinter::EmitRomData(Module &M) {
+ // Print ROM Data section.
+ const std::vector<PIC16Section*> &ROSections = PTOF->ROSections;
+ for (unsigned i = 0; i < ROSections.size(); i++) {
+ const std::vector<const GlobalVariable*> &Items = ROSections[i]->Items;
+ if (!Items.size()) continue;
+ O << "\n";
+ OutStreamer.SwitchSection(PTOF->ROSections[i]->S_);
+ for (unsigned j = 0; j < Items.size(); j++) {
+ O << Mang->getMangledName(Items[j]);
+ Constant *C = Items[j]->getInitializer();
+ int AddrSpace = Items[j]->getType()->getAddressSpace();
+ EmitGlobalConstant(C, AddrSpace);
+ }
+ }
+}
+
+bool PIC16AsmPrinter::doFinalization(Module &M) {
+ printLibcallDecls();
+ EmitRemainingAutos();
+ DbgInfo.EndModule(M);
+ O << "\n\t" << "END\n";
+ return AsmPrinter::doFinalization(M);
+}
+
+void PIC16AsmPrinter::EmitFunctionFrame(MachineFunction &MF) {
+ const Function *F = MF.getFunction();
+ std::string FuncName = Mang->getMangledName(F);
+ const TargetData *TD = TM.getTargetData();
+ // Emit the data section name.
+ O << "\n";
+
+ const MCSection *fPDataSection =
+ getObjFileLowering().getSectionForFunctionFrame(CurrentFnName);
+ OutStreamer.SwitchSection(fPDataSection);
+
+ // Emit function frame label
+ O << PAN::getFrameLabel(CurrentFnName) << ":\n";
+
+ const Type *RetType = F->getReturnType();
+ unsigned RetSize = 0;
+ if (RetType->getTypeID() != Type::VoidTyID)
+ RetSize = TD->getTypeAllocSize(RetType);
+
+ //Emit function return value space
+ // FIXME: Do not emit RetvalLable when retsize is zero. To do this
+ // we will need to avoid printing a global directive for Retval label
+ // in emitExternandGloblas.
+ if(RetSize > 0)
+ O << PAN::getRetvalLabel(CurrentFnName) << " RES " << RetSize << "\n";
+ else
+ O << PAN::getRetvalLabel(CurrentFnName) << ": \n";
+
+ // Emit variable to hold the space for function arguments
+ unsigned ArgSize = 0;
+ for (Function::const_arg_iterator argi = F->arg_begin(),
+ arge = F->arg_end(); argi != arge ; ++argi) {
+ const Type *Ty = argi->getType();
+ ArgSize += TD->getTypeAllocSize(Ty);
+ }
+
+ O << PAN::getArgsLabel(CurrentFnName) << " RES " << ArgSize << "\n";
+
+ // Emit temporary space
+ int TempSize = PTLI->GetTmpSize();
+ if (TempSize > 0)
+ O << PAN::getTempdataLabel(CurrentFnName) << " RES " << TempSize << '\n';
+}
+
+void PIC16AsmPrinter::EmitIData(Module &M) {
+
+ // Print all IDATA sections.
+ const std::vector<PIC16Section*> &IDATASections = PTOF->IDATASections;
+ for (unsigned i = 0; i < IDATASections.size(); i++) {
+ O << "\n";
+ if (IDATASections[i]->S_->getName().find("llvm.") != std::string::npos)
+ continue;
+ OutStreamer.SwitchSection(IDATASections[i]->S_);
+ std::vector<const GlobalVariable*> Items = IDATASections[i]->Items;
+ for (unsigned j = 0; j < Items.size(); j++) {
+ std::string Name = Mang->getMangledName(Items[j]);
+ Constant *C = Items[j]->getInitializer();
+ int AddrSpace = Items[j]->getType()->getAddressSpace();
+ O << Name;
+ EmitGlobalConstant(C, AddrSpace);
+ }
+ }
+}
+
+void PIC16AsmPrinter::EmitUData(Module &M) {
+ const TargetData *TD = TM.getTargetData();
+
+ // Print all BSS sections.
+ const std::vector<PIC16Section*> &BSSSections = PTOF->BSSSections;
+ for (unsigned i = 0; i < BSSSections.size(); i++) {
+ O << "\n";
+ OutStreamer.SwitchSection(BSSSections[i]->S_);
+ std::vector<const GlobalVariable*> Items = BSSSections[i]->Items;
+ for (unsigned j = 0; j < Items.size(); j++) {
+ std::string Name = Mang->getMangledName(Items[j]);
+ Constant *C = Items[j]->getInitializer();
+ const Type *Ty = C->getType();
+ unsigned Size = TD->getTypeAllocSize(Ty);
+
+ O << Name << " RES " << Size << "\n";
+ }
+ }
+}
+
+void PIC16AsmPrinter::EmitAutos(std::string FunctName) {
+ // Section names for all globals are already set.
+ const TargetData *TD = TM.getTargetData();
+
+ // Now print Autos section for this function.
+ std::string SectionName = PAN::getAutosSectionName(FunctName);
+ const std::vector<PIC16Section*> &AutosSections = PTOF->AutosSections;
+ for (unsigned i = 0; i < AutosSections.size(); i++) {
+ O << "\n";
+ if (AutosSections[i]->S_->getName() == SectionName) {
+ // Set the printing status to true
+ AutosSections[i]->setPrintedStatus(true);
+ OutStreamer.SwitchSection(AutosSections[i]->S_);
+ const std::vector<const GlobalVariable*> &Items = AutosSections[i]->Items;
+ for (unsigned j = 0; j < Items.size(); j++) {
+ std::string VarName = Mang->getMangledName(Items[j]);
+ Constant *C = Items[j]->getInitializer();
+ const Type *Ty = C->getType();
+ unsigned Size = TD->getTypeAllocSize(Ty);
+ // Emit memory reserve directive.
+ O << VarName << " RES " << Size << "\n";
+ }
+ break;
+ }
+ }
+}
+
+// Print autos that were not printed during the code printing of functions.
+// As the functions might themselves would have got deleted by the optimizer.
+void PIC16AsmPrinter::EmitRemainingAutos() {
+ const TargetData *TD = TM.getTargetData();
+
+ // Now print Autos section for this function.
+ std::vector <PIC16Section *>AutosSections = PTOF->AutosSections;
+ for (unsigned i = 0; i < AutosSections.size(); i++) {
+
+ // if the section is already printed then don't print again
+ if (AutosSections[i]->isPrinted())
+ continue;
+
+ // Set status as printed
+ AutosSections[i]->setPrintedStatus(true);
+
+ O << "\n";
+ OutStreamer.SwitchSection(AutosSections[i]->S_);
+ const std::vector<const GlobalVariable*> &Items = AutosSections[i]->Items;
+ for (unsigned j = 0; j < Items.size(); j++) {
+ std::string VarName = Mang->getMangledName(Items[j]);
+ Constant *C = Items[j]->getInitializer();
+ const Type *Ty = C->getType();
+ unsigned Size = TD->getTypeAllocSize(Ty);
+ // Emit memory reserve directive.
+ O << VarName << " RES " << Size << "\n";
+ }
+ }
+}
+
+
+extern "C" void LLVMInitializePIC16AsmPrinter() {
+ RegisterAsmPrinter<PIC16AsmPrinter> X(ThePIC16Target);
+}
+
+
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