#include "llvm/Module.h"
#include "llvm/CodeGen/DwarfWriter.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
-#include "llvm/Support/raw_ostream.h"
-#include "llvm/Support/Mangler.h"
#include "llvm/CodeGen/DwarfWriter.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
-
+#include "llvm/MC/MCSection.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"
using namespace llvm;
#include "PIC16GenAsmWriter.inc"
+PIC16AsmPrinter::PIC16AsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
+ const TargetAsmInfo *T, bool V)
+: AsmPrinter(O, TM, T, V), DbgInfo(O, T) {
+ PTLI = static_cast<const PIC16TargetLowering*>(TM.getTargetLowering());
+ PTAI = static_cast<const PIC16TargetAsmInfo*>(T);
+ PTOF = (PIC16TargetObjectFile*)&PTLI->getObjFileLowering();
+}
+
bool PIC16AsmPrinter::printMachineInstruction(const MachineInstr *MI) {
printInstruction(MI);
return true;
}
-/// runOnMachineFunction - This uses the printInstruction()
-/// method to print assembly for each instruction.
+/// 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;
// Get the mangled name.
const Function *F = MF.getFunction();
- CurrentFnName = Mang->getValueName(F);
+ CurrentFnName = Mang->getMangledName(F);
+
+ // Emit the function frame (args and temps).
+ EmitFunctionFrame(MF);
+
+ DbgInfo.BeginFunction(MF);
- // Emit the function variables.
- emitFunctionData(MF);
- const char *codeSection = PAN::getCodeSectionName(CurrentFnName).c_str();
+ // Emit the autos section of function.
+ EmitAutos(CurrentFnName);
+
+ // Now emit the instructions of function in its code section.
+ std::string T = PAN::getCodeSectionName(CurrentFnName);
+ const char *codeSection = T.c_str();
- const Section *fCodeSection = TAI->getNamedSection(codeSection,
- SectionFlags::Code);
- O << "\n";
+ const MCSection *fCodeSection =
+ getObjFileLowering().getOrCreateSection(codeSection, false,
+ SectionKind::getText());
// Start the Code Section.
- SwitchToSection (fCodeSection);
+ O << "\n";
+ SwitchToSection(fCodeSection);
// Emit the frame address of the function at the beginning of code.
O << "\tretlw low(" << 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()) {
printBasicBlockLabel(I, true);
O << '\n';
}
- // For emitting line directives, we need to keep track of the current
- // source line. When it changes then only emit the line directive.
- unsigned CurLine = 0;
+ // 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()) {
- unsigned line = MF.getDebugLocTuple(DL).Line;
- if (line != CurLine) {
- O << "\t.line " << line << "\n";
- CurLine = line;
- }
+ 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.
}
-/// createPIC16CodePrinterPass - Returns a pass that prints the PIC16
-/// assembly code for a MachineFunction to the given output stream,
-/// using the given target machine description. This should work
-/// regardless of whether the function is in SSA form.
-///
-FunctionPass *llvm::createPIC16CodePrinterPass(raw_ostream &o,
- PIC16TargetMachine &tm,
- CodeGenOpt::Level OptLevel,
- bool verbose) {
- return new PIC16AsmPrinter(o, tm, tm.getTargetAsmInfo(), OptLevel, verbose);
-}
+// printOperand - print operand of insn.
void PIC16AsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
const MachineOperand &MO = MI->getOperand(opNum);
if (TargetRegisterInfo::isPhysicalRegister(MO.getReg()))
O << TM.getRegisterInfo()->get(MO.getReg()).AsmName;
else
- assert(0 && "not implemented");
- return;
+ llvm_unreachable("not implemented");
+ return;
case MachineOperand::MO_Immediate:
O << (int)MO.getImm();
return;
case MachineOperand::MO_GlobalAddress: {
- O << Mang->getValueName(MO.getGlobal());
+ 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: {
- std::string Name = MO.getSymbolName();
- O << MO.getSymbolName();
+ 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:
return;
default:
- assert(0 && " Operand type not supported.");
+ 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) {
+ std::string str1 = s1;
+ std::string str2 = s2;
+ int i = str1.compare(str2);
+ // Return true if s1 is smaller or equal.
+ if (i <= 0) return true;
+ // false if s1 should come after s2.
+ return false;
+}
+
+// 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) {
+ std::string str1 = s1;
+ std::string str2 = s2;
+ return str1 == str2;
+}
-bool PIC16AsmPrinter::doInitialization (Module &M) {
+/// printLibcallDecls - print the extern declarations for compiler
+/// intrinsics.
+///
+void PIC16AsmPrinter::printLibcallDecls(void) {
+ // If no libcalls used, return.
+ if (LibcallDecls.empty()) return;
+
+ O << TAI->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 << TAI->getExternDirective() << *I << "\n";
+ O << TAI->getExternDirective() << PAN::getArgsLabel(*I) << "\n";
+ O << TAI->getExternDirective() << PAN::getRetvalLabel(*I) << "\n";
+ }
+ O << TAI->getCommentString() << "External decls for libcalls - END." <<"\n";
+}
+
+/// 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 << "\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);
-
- EmitExternsAndGlobals (M);
- EmitGlobalData(M);
+ 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())
+ I->setSection(getObjFileLowering().
+ SectionForGlobal(I, Mang,TM)->getName());
+
+ DbgInfo.BeginModule(M);
+ EmitFunctionDecls(M);
+ EmitUndefinedVars(M);
+ EmitDefinedVars(M);
+ EmitIData(M);
+ EmitUData(M);
EmitRomData(M);
return Result;
}
-void PIC16AsmPrinter::EmitExternsAndGlobals (Module &M) {
+/// 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 << "section.0" <<"\n";
+ O <<"\n"<<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 (I->isIntrinsic())
+ continue;
+
+ std::string Name = Mang->getMangledName(I);
if (Name.compare("@abort") == 0)
continue;
- // If it is llvm intrinsic call then don't emit
- if (Name.find("llvm.") != std::string::npos)
+ if (!I->isDeclaration() && !I->hasExternalLinkage())
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 << PAN::getArgsLabel(Name) << "\n";
}
- // Emit header file to include declaration of library functions
- // FIXME: find out libcall names.
- O << "\t#include C16IntrinsicCalls.INC\n";
-
- // Emit declarations for external variable declarations and definitions.
- 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 (PAN::isLocalName(Name))
- continue;
+ O << TAI->getCommentString() << "Function Declarations - END." <<"\n";
+}
- if (!(I->isDeclaration() || I->hasExternalLinkage() ||
- I->hasCommonLinkage()))
- continue;
+// Emit variables imported from other Modules.
+void PIC16AsmPrinter::EmitUndefinedVars(Module &M) {
+ std::vector<const GlobalVariable*> Items = PTOF->ExternalVarDecls->Items;
+ if (!Items.size()) return;
- const char *directive = I->isDeclaration() ? TAI->getExternDirective() :
- TAI->getGlobalDirective();
- O << directive << Name << "\n";
+ O << "\n" << TAI->getCommentString() << "Imported Variables - BEGIN" << "\n";
+ for (unsigned j = 0; j < Items.size(); j++) {
+ O << TAI->getExternDirective() << Mang->getMangledName(Items[j]) << "\n";
}
+ O << TAI->getCommentString() << "Imported Variables - END" << "\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)) {
+// 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;
- 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 (PAN::isLocalName(name))
- continue;
+ O << "\n" << TAI->getCommentString() << "Exported Variables - BEGIN" << "\n";
+ for (unsigned j = 0; j < Items.size(); j++) {
+ O << TAI->getGlobalDirective() << Mang->getMangledName(Items[j]) << "\n";
+ }
+ O << TAI->getCommentString() << "Exported Variables - END" << "\n";
+}
- I->setSection(TAI->getReadOnlySection()->getName());
- O << name;
+// 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";
+ SwitchToSection(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);
- O << "\n";
}
}
- IsRomData = false;
}
bool PIC16AsmPrinter::doFinalization(Module &M) {
- O << "\t" << "END\n";
- bool Result = AsmPrinter::doFinalization(M);
- return Result;
+ printLibcallDecls();
+ EmitRemainingAutos();
+ DbgInfo.EndModule(M);
+ O << "\n\t" << "END\n";
+ return AsmPrinter::doFinalization(M);
}
-void PIC16AsmPrinter::emitFunctionData(MachineFunction &MF) {
+void PIC16AsmPrinter::EmitFunctionFrame(MachineFunction &MF) {
const Function *F = MF.getFunction();
- std::string FuncName = Mang->getValueName(F);
- Module *M = const_cast<Module *>(F->getParent());
+ std::string FuncName = Mang->getMangledName(F);
const TargetData *TD = TM.getTargetData();
- unsigned FrameSize = 0;
// Emit the data section name.
O << "\n";
- const char *SectionName = PAN::getFrameSectionName(CurrentFnName).c_str();
+ std::string T = PAN::getFrameSectionName(CurrentFnName);
+ const char *SectionName = T.c_str();
- const Section *fPDataSection = TAI->getNamedSection(SectionName,
- SectionFlags::Writeable);
+ const MCSection *fPDataSection =
+ getObjFileLowering().getOrCreateSection(SectionName, false,
+ SectionKind::getDataRel());
SwitchToSection(fPDataSection);
// Emit function frame label
// Emit temporary space
int TempSize = PTLI->GetTmpSize();
- if (TempSize > 0 )
- O << PAN::getTempdataLabel(CurrentFnName) << " RES " << TempSize <<"\n";
-
- // Emit the section name for local variables.
- O << "\n";
- const char* SecNameLocals = PAN::getAutosSectionName(CurrentFnName).c_str() ;
-
- const Section *fADataSection = TAI->getNamedSection(SecNameLocals,
- SectionFlags::Writeable);
- SwitchToSection(fADataSection);
-
- // 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 (! PAN::isLocalToFunc(FuncName, VarName))
- continue;
-
- I->setSection(TAI->SectionForGlobal(I)->getName());
- Constant *C = I->getInitializer();
- const Type *Ty = C->getType();
- unsigned Size = TD->getTypeAllocSize(Ty);
- FrameSize += Size;
- // Emit memory reserve directive.
- O << VarName << " RES " << Size << "\n";
- }
+ if (TempSize > 0)
+ O << PAN::getTempdataLabel(CurrentFnName) << " RES " << TempSize << '\n';
}
-void PIC16AsmPrinter::EmitGlobalData (Module &M)
-{
- // 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());
- }
-
- const PIC16TargetAsmInfo *PTAI = static_cast<const PIC16TargetAsmInfo *>(TAI);
- const TargetData *TD = TM.getTargetData();
+void PIC16AsmPrinter::EmitIData(Module &M) {
- // Now print all IDATA sections.
- std::vector <PIC16Section *>IDATASections = PTAI->IDATASections;
+ // 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;
SwitchToSection(IDATASections[i]->S_);
std::vector<const GlobalVariable*> Items = IDATASections[i]->Items;
for (unsigned j = 0; j < Items.size(); j++) {
- std::string Name = Mang->getValueName(Items[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();
- // Now print all BSS sections.
- std::vector <PIC16Section *>BSSSections = PTAI->BSSSections;
+ // Print all BSS sections.
+ const std::vector<PIC16Section*> &BSSSections = PTOF->BSSSections;
for (unsigned i = 0; i < BSSSections.size(); i++) {
+ O << "\n";
SwitchToSection(BSSSections[i]->S_);
std::vector<const GlobalVariable*> Items = BSSSections[i]->Items;
for (unsigned j = 0; j < Items.size(); j++) {
- std::string Name = Mang->getValueName(Items[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 ;
- O << "\n";
+ 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);
+ SwitchToSection(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";
+ SwitchToSection(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 LLVMInitializePIC16Target() {
+ // Register the targets
+ RegisterTargetMachine<PIC16TargetMachine> A(ThePIC16Target);
+ RegisterTargetMachine<CooperTargetMachine> B(TheCooperTarget);
+ RegisterAsmPrinter<PIC16AsmPrinter> C(ThePIC16Target);
+ RegisterAsmPrinter<PIC16AsmPrinter> D(TheCooperTarget);
+}
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