//===----------------------------------------------------------------------===//
#include "PIC16TargetObjectFile.h"
+#include "MCSectionPIC16.h"
#include "PIC16ISelLowering.h"
#include "PIC16TargetMachine.h"
-#include "PIC16Section.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
#include "llvm/MC/MCSection.h"
using namespace llvm;
-PIC16TargetObjectFile::PIC16TargetObjectFile() {
+MCSectionPIC16 *MCSectionPIC16::Create(const StringRef &Name, SectionKind K,
+ int Address, int Color, MCContext &Ctx) {
+ return new (Ctx) MCSectionPIC16(Name, K, Address, Color);
}
-/// Find a pic16 section. If not found, create one.
-PIC16Section *PIC16TargetObjectFile::
-getPIC16Section(const std::string &Name, PIC16SectionType Ty,
- const std::string &Address, int Color) const {
- /// Return if we have an already existing one.
- PIC16Section *&Entry = SectionsByName[Name];
- if (Entry)
- return Entry;
-
-
- Entry = PIC16Section::Create(Name, Ty, Address, Color, getContext());
- return Entry;
+void MCSectionPIC16::PrintSwitchToSection(const MCAsmInfo &MAI,
+ raw_ostream &OS) const {
+ OS << getName() << '\n';
}
-/// Find a standard pic16 data section. If not found, create one and keep
-/// track of it by adding it to appropriate std section list.
-PIC16Section *PIC16TargetObjectFile::
-getPIC16DataSection(const std::string &Name, PIC16SectionType Ty,
- const std::string &Address, int Color) const {
-
- /// Return if we have an already existing one.
- PIC16Section *&Entry = SectionsByName[Name];
- if (Entry)
- return Entry;
-
- /// Else create a new one and add it to appropriate section list.
- Entry = PIC16Section::Create(Name, Ty, Address, Color, getContext());
- switch (Ty) {
- default: llvm_unreachable ("unknow standard section type.");
- case UDATA: UDATASections_.push_back(Entry); break;
- case IDATA: IDATASections_.push_back(Entry); break;
- case ROMDATA: ROMDATASection_ = Entry; break;
- }
- return Entry;
+PIC16TargetObjectFile::PIC16TargetObjectFile()
+ : ExternalVarDecls(0), ExternalVarDefs(0) {
}
-
-
-/// Find a standard pic16 autos section. If not found, create one and keep
-/// track of it by adding it to appropriate std section list.
-PIC16Section *PIC16TargetObjectFile::
-getPIC16AutoSection(const std::string &Name, PIC16SectionType Ty,
- const std::string &Address, int Color) const {
- /// Return if we have an already existing one.
- PIC16Section *&Entry = SectionsByName[Name];
+const MCSectionPIC16 *PIC16TargetObjectFile::
+getPIC16Section(const char *Name, SectionKind Kind,
+ int Address, int Color) const {
+ MCSectionPIC16 *&Entry = SectionsByName[Name];
if (Entry)
return Entry;
-
- /// Else create a new one and add it to appropriate section list.
- Entry = PIC16Section::Create(Name, Ty, Address, Color, getContext());
-
- assert (Ty == UDATA_OVR && "incorrect section type for autos");
- AUTOSections_.push_back(Entry);
-
- return Entry;
+ return Entry = MCSectionPIC16::Create(Name, Kind, Address, Color,
+ getContext());
}
-
-/// Find a pic16 user section. If not found, create one and keep
-/// track of it by adding it to appropriate std section list.
-PIC16Section *PIC16TargetObjectFile::
-getPIC16UserSection(const std::string &Name, PIC16SectionType Ty,
- const std::string &Address, int Color) const {
-
- /// Return if we have an already existing one.
- PIC16Section *&Entry = SectionsByName[Name];
- if (Entry)
- return Entry;
-
- /// Else create a new one and add it to appropriate section list.
- Entry = PIC16Section::Create(Name, Ty, Address, Color, getContext());
- USERSections_.push_back(Entry);
-
- return Entry;
-}
-
-/// Do some standard llvm stuff. PIC16 really does not need any of this.
void PIC16TargetObjectFile::Initialize(MCContext &Ctx, const TargetMachine &tm){
TargetLoweringObjectFile::Initialize(Ctx, tm);
TM = &tm;
- // BSSSection = getPIC16DataSection("udata.#", UDATA);
- // ReadOnlySection = getPIC16DataSection("romdata.#", ROMDATA);
- // DataSection = getPIC16DataSection("idata.#", IDATA);
+ BSSSection = getPIC16Section("udata.# UDATA", MCSectionPIC16::UDATA_Kind());
+ ReadOnlySection = getPIC16Section("romdata.# ROMDATA",
+ MCSectionPIC16::ROMDATA_Kind());
+ DataSection = getPIC16Section("idata.# IDATA", MCSectionPIC16::IDATA_Kind());
// Need because otherwise a .text symbol is emitted by DwarfWriter
// in BeginModule, and gpasm cribbs for that .text symbol.
- // FIXME: below
- // TextSection = getPIC16DataSection("", UDATA);
- ROMDATASection_ = NULL;
+ TextSection = getPIC16Section("", SectionKind::getText());
+
+ ROSections.push_back(new PIC16Section((MCSectionPIC16*)ReadOnlySection));
+
+ // FIXME: I don't know what the classification of these sections really is.
+ // These aren't really objects belonging to any section. Just emit them
+ // in AsmPrinter and remove this code from here.
+ ExternalVarDecls = new PIC16Section(getPIC16Section("ExternalVarDecls",
+ SectionKind::getMetadata()));
+ ExternalVarDefs = new PIC16Section(getPIC16Section("ExternalVarDefs",
+ SectionKind::getMetadata()));
+}
+
+const MCSection *PIC16TargetObjectFile::
+getSectionForFunction(const std::string &FnName) const {
+ std::string T = PAN::getCodeSectionName(FnName);
+ return getPIC16Section(T.c_str(), SectionKind::getText());
+}
+
+
+const MCSection *PIC16TargetObjectFile::
+getSectionForFunctionFrame(const std::string &FnName) const {
+ std::string T = PAN::getFrameSectionName(FnName);
+ return getPIC16Section(T.c_str(), SectionKind::getDataRel());
}
-/// allocateUDATA - Allocate a un-initialized global to an existing or new UDATA
-/// section and return that section.
const MCSection *
-PIC16TargetObjectFile::allocateUDATA(const GlobalVariable *GV) const {
+PIC16TargetObjectFile::getBSSSectionForGlobal(const GlobalVariable *GV) const {
assert(GV->hasInitializer() && "This global doesn't need space");
Constant *C = GV->getInitializer();
assert(C->isNullValue() && "Unitialized globals has non-zero initializer");
const Type *Ty = C->getType();
unsigned ValSize = TD->getTypeAllocSize(Ty);
- // Go through all UDATA Sections and assign this variable
+ // Go through all BSS Sections and assign this variable
// to the first available section having enough space.
- PIC16Section *Found = NULL;
- for (unsigned i = 0; i < UDATASections_.size(); i++) {
- if (DataBankSize - UDATASections_[i]->getSize() >= ValSize) {
- Found = UDATASections_[i];
+ PIC16Section *FoundBSS = NULL;
+ for (unsigned i = 0; i < BSSSections.size(); i++) {
+ if (DataBankSize - BSSSections[i]->Size >= ValSize) {
+ FoundBSS = BSSSections[i];
break;
}
}
- // No UDATA section spacious enough was found. Crate a new one.
- if (!Found) {
- std::string name = PAN::getUdataSectionName(UDATASections_.size());
- Found = getPIC16DataSection(name.c_str(), UDATA);
+ // No BSS section spacious enough was found. Crate a new one.
+ if (!FoundBSS) {
+ std::string name = PAN::getUdataSectionName(BSSSections.size());
+ const MCSectionPIC16 *NewSection
+ = getPIC16Section(name.c_str(), MCSectionPIC16::UDATA_Kind());
+
+ FoundBSS = new PIC16Section(NewSection);
+
+ // Add this newly created BSS section to the list of BSSSections.
+ BSSSections.push_back(FoundBSS);
}
- // Insert the GV into this UDATA section.
- Found->Items.push_back(GV);
- Found->setSize(Found->getSize() + ValSize);
- return Found;
+ // Insert the GV into this BSS.
+ FoundBSS->Items.push_back(GV);
+ FoundBSS->Size += ValSize;
+ return FoundBSS->S_;
}
-/// allocateIDATA - allocate an initialized global into an existing
-/// or new section and return that section.
const MCSection *
-PIC16TargetObjectFile::allocateIDATA(const GlobalVariable *GV) const{
+PIC16TargetObjectFile::getIDATASectionForGlobal(const GlobalVariable *GV) const{
assert(GV->hasInitializer() && "This global doesn't need space");
Constant *C = GV->getInitializer();
assert(!C->isNullValue() && "initialized globals has zero initializer");
assert(GV->getType()->getAddressSpace() == PIC16ISD::RAM_SPACE &&
- "can allocate initialized RAM data only");
+ "can split initialized RAM data only");
// Find how much space this global needs.
const TargetData *TD = TM->getTargetData();
// Go through all IDATA Sections and assign this variable
// to the first available section having enough space.
- PIC16Section *Found = NULL;
- for (unsigned i = 0; i < IDATASections_.size(); i++) {
- if (DataBankSize - IDATASections_[i]->getSize() >= ValSize) {
- Found = IDATASections_[i];
+ PIC16Section *FoundIDATA = NULL;
+ for (unsigned i = 0; i < IDATASections.size(); i++) {
+ if (DataBankSize - IDATASections[i]->Size >= ValSize) {
+ FoundIDATA = IDATASections[i];
break;
}
}
// No IDATA section spacious enough was found. Crate a new one.
- if (!Found) {
- std::string name = PAN::getIdataSectionName(IDATASections_.size());
- Found = getPIC16DataSection(name.c_str(), IDATA);
+ if (!FoundIDATA) {
+ std::string name = PAN::getIdataSectionName(IDATASections.size());
+ const MCSectionPIC16 *NewSection =
+ getPIC16Section(name.c_str(), MCSectionPIC16::IDATA_Kind());
+
+ FoundIDATA = new PIC16Section(NewSection);
+
+ // Add this newly created IDATA section to the list of IDATASections.
+ IDATASections.push_back(FoundIDATA);
}
// Insert the GV into this IDATA.
- Found->Items.push_back(GV);
- Found->setSize(Found->getSize() + ValSize);
- return Found;
+ FoundIDATA->Items.push_back(GV);
+ FoundIDATA->Size += ValSize;
+ return FoundIDATA->S_;
}
-// Allocate a program memory variable into ROMDATA section.
-const MCSection *
-PIC16TargetObjectFile::allocateROMDATA(const GlobalVariable *GV) const {
-
- std::string name = PAN::getRomdataSectionName();
- PIC16Section *S = getPIC16DataSection(name.c_str(), ROMDATA);
-
- S->Items.push_back(GV);
- return S;
-}
-
// Get the section for an automatic variable of a function.
// For PIC16 they are globals only with mangled names.
const MCSection *
-PIC16TargetObjectFile::allocateAUTO(const GlobalVariable *GV) const {
+PIC16TargetObjectFile::getSectionForAuto(const GlobalVariable *GV) const {
const std::string name = PAN::getSectionNameForSym(GV->getName());
- PIC16Section *S = getPIC16AutoSection(name.c_str());
- S->Items.push_back(GV);
- return S;
+ // Go through all Auto Sections and assign this variable
+ // to the appropriate section.
+ PIC16Section *FoundAutoSec = NULL;
+ for (unsigned i = 0; i < AutosSections.size(); i++) {
+ if (AutosSections[i]->S_->getName() == name) {
+ FoundAutoSec = AutosSections[i];
+ break;
+ }
+ }
+
+ // No Auto section was found. Crate a new one.
+ if (!FoundAutoSec) {
+ const MCSectionPIC16 *NewSection =
+ getPIC16Section(name.c_str(), MCSectionPIC16::UDATA_OVR_Kind());
+
+ FoundAutoSec = new PIC16Section(NewSection);
+
+ // Add this newly created autos section to the list of AutosSections.
+ AutosSections.push_back(FoundAutoSec);
+ }
+
+ // Insert the auto into this section.
+ FoundAutoSec->Items.push_back(GV);
+
+ return FoundAutoSec->S_;
}
if (!GV)
return TargetLoweringObjectFile::SelectSectionForGlobal(GV1, Kind, Mang,TM);
+ // Record External Var Decls.
+ if (GV->isDeclaration()) {
+ ExternalVarDecls->Items.push_back(GV);
+ return ExternalVarDecls->S_;
+ }
+
assert(GV->hasInitializer() && "A def without initializer?");
// First, if this is an automatic variable for a function, get the section
// name for it and return.
std::string name = GV->getName();
if (PAN::isLocalName(name))
- return allocateAUTO(GV);
+ return getSectionForAuto(GV);
+
+ // Record Exteranl Var Defs.
+ if (GV->hasExternalLinkage() || GV->hasCommonLinkage())
+ ExternalVarDefs->Items.push_back(GV);
// See if this is an uninitialized global.
const Constant *C = GV->getInitializer();
if (C->isNullValue())
- return allocateUDATA(GV);
+ return getBSSSectionForGlobal(GV);
// If this is initialized data in RAM. Put it in the correct IDATA section.
if (GV->getType()->getAddressSpace() == PIC16ISD::RAM_SPACE)
- return allocateIDATA(GV);
+ return getIDATASectionForGlobal(GV);
// This is initialized data in rom, put it in the readonly section.
if (GV->getType()->getAddressSpace() == PIC16ISD::ROM_SPACE)
- return allocateROMDATA(GV);
+ return getROSectionForGlobal(GV);
// Else let the default implementation take care of it.
return TargetLoweringObjectFile::SelectSectionForGlobal(GV, Kind, Mang,TM);
}
PIC16TargetObjectFile::~PIC16TargetObjectFile() {
-#if 0
- for (unsigned i = 0; i < UDATASections_.size(); i++)
- delete UDATASections_[i];
- for (unsigned i = 0; i < IDATASections_.size(); i++)
- delete IDATASections_[i];
-
- delete ROMDATASection_;
-
- for (unsigned i = 0; i < AUTOSections_.size(); i++)
- delete AUTOSections_[i];
-
- for (unsigned i = 0; i < USERSections_.size(); i++)
- delete USERSections_[i];
-#endif
+ for (unsigned i = 0; i < BSSSections.size(); i++)
+ delete BSSSections[i];
+ for (unsigned i = 0; i < IDATASections.size(); i++)
+ delete IDATASections[i];
+ for (unsigned i = 0; i < AutosSections.size(); i++)
+ delete AutosSections[i];
+ for (unsigned i = 0; i < ROSections.size(); i++)
+ delete ROSections[i];
+ delete ExternalVarDecls;
+ delete ExternalVarDefs;
}
-/// getExplicitSectionGlobal - Allow the target to completely override
+/// getSpecialCasedSectionGlobals - Allow the target to completely override
/// section assignment of a global.
const MCSection *PIC16TargetObjectFile::
getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
std::string SectName = GVar->getSection();
// If address for a variable is specified, get the address and create
// section.
- // FIXME: move this attribute checking in PAN.
std::string AddrStr = "Address=";
if (SectName.compare(0, AddrStr.length(), AddrStr) == 0) {
std::string SectAddr = SectName.substr(AddrStr.length());
- return allocateAtGivenAddress(GVar, SectAddr);
+ return CreateSectionForGlobal(GVar, Mang, SectAddr);
}
// Create the section specified with section attribute.
- return allocateInGivenSection(GVar);
+ return CreateSectionForGlobal(GVar, Mang);
}
- return getPIC16DataSection(GV->getSection().c_str(), UDATA);
+ return getPIC16Section(GV->getSection().c_str(), Kind);
}
-// Interface used by AsmPrinter to get a code section for a function.
-const PIC16Section *
-PIC16TargetObjectFile::SectionForCode(const std::string &FnName) const {
- const std::string &sec_name = PAN::getCodeSectionName(FnName);
- return getPIC16Section(sec_name, CODE);
-}
-
-// Interface used by AsmPrinter to get a frame section for a function.
-const PIC16Section *
-PIC16TargetObjectFile::SectionForFrame(const std::string &FnName) const {
- const std::string &sec_name = PAN::getFrameSectionName(FnName);
- return getPIC16Section(sec_name, UDATA_OVR);
-}
-
-// Allocate a global var in existing or new section of given name.
+// Create a new section for global variable. If Addr is given then create
+// section at that address else create by name.
const MCSection *
-PIC16TargetObjectFile::allocateInGivenSection(const GlobalVariable *GV) const {
- // Determine the type of section that we need to create.
- PIC16SectionType SecTy;
-
+PIC16TargetObjectFile::CreateSectionForGlobal(const GlobalVariable *GV,
+ Mangler *Mang,
+ const std::string &Addr) const {
// See if this is an uninitialized global.
const Constant *C = GV->getInitializer();
if (C->isNullValue())
- SecTy = UDATA;
+ return CreateBSSSectionForGlobal(GV, Addr);
+
// If this is initialized data in RAM. Put it in the correct IDATA section.
- else if (GV->getType()->getAddressSpace() == PIC16ISD::RAM_SPACE)
- SecTy = IDATA;
+ if (GV->getType()->getAddressSpace() == PIC16ISD::RAM_SPACE)
+ return CreateIDATASectionForGlobal(GV, Addr);
+
// This is initialized data in rom, put it in the readonly section.
- else if (GV->getType()->getAddressSpace() == PIC16ISD::ROM_SPACE)
- SecTy = ROMDATA;
- else
- llvm_unreachable ("Could not determine section type for global");
-
- PIC16Section *S = getPIC16UserSection(GV->getSection().c_str(), SecTy);
- S->Items.push_back(GV);
- return S;
+ if (GV->getType()->getAddressSpace() == PIC16ISD::ROM_SPACE)
+ return CreateROSectionForGlobal(GV, Addr);
+
+ // Else let the default implementation take care of it.
+ return TargetLoweringObjectFile::SectionForGlobal(GV, Mang, *TM);
}
-// Allocate a global var in a new absolute sections at given address.
+// Create uninitialized section for a variable.
const MCSection *
-PIC16TargetObjectFile::allocateAtGivenAddress(const GlobalVariable *GV,
- const std::string &Addr) const {
- // Determine the type of section that we need to create.
- PIC16SectionType SecTy;
+PIC16TargetObjectFile::CreateBSSSectionForGlobal(const GlobalVariable *GV,
+ std::string Addr) const {
+ assert(GV->hasInitializer() && "This global doesn't need space");
+ assert(GV->getInitializer()->isNullValue() &&
+ "Unitialized global has non-zero initializer");
+ std::string Name;
+ // If address is given then create a section at that address else create a
+ // section by section name specified in GV.
+ PIC16Section *FoundBSS = NULL;
+ if (Addr.empty()) {
+ Name = GV->getSection() + " UDATA";
+ for (unsigned i = 0; i < BSSSections.size(); i++) {
+ if (BSSSections[i]->S_->getName() == Name) {
+ FoundBSS = BSSSections[i];
+ break;
+ }
+ }
+ } else {
+ std::string Prefix = GV->getNameStr() + "." + Addr + ".";
+ Name = PAN::getUdataSectionName(BSSSections.size(), Prefix) + " " + Addr;
+ }
+
+ PIC16Section *NewBSS = FoundBSS;
+ if (NewBSS == NULL) {
+ const MCSectionPIC16 *NewSection =
+ getPIC16Section(Name.c_str(), MCSectionPIC16::UDATA_Kind());
+ NewBSS = new PIC16Section(NewSection);
+ BSSSections.push_back(NewBSS);
+ }
- // See if this is an uninitialized global.
- const Constant *C = GV->getInitializer();
- if (C->isNullValue())
- SecTy = UDATA;
- // If this is initialized data in RAM. Put it in the correct IDATA section.
- else if (GV->getType()->getAddressSpace() == PIC16ISD::RAM_SPACE)
- SecTy = IDATA;
- // This is initialized data in rom, put it in the readonly section.
- else if (GV->getType()->getAddressSpace() == PIC16ISD::ROM_SPACE)
- SecTy = ROMDATA;
- else
- llvm_unreachable ("Could not determine section type for global");
-
- std::string Prefix = GV->getNameStr() + "." + Addr + ".";
- std::string SName = PAN::getUserSectionName(Prefix);
- PIC16Section *S = getPIC16UserSection(SName.c_str(), SecTy, Addr.c_str());
- S->Items.push_back(GV);
- return S;
+ // Insert the GV into this BSS.
+ NewBSS->Items.push_back(GV);
+
+ // We do not want to put any GV without explicit section into this section
+ // so set its size to DatabankSize.
+ NewBSS->Size = DataBankSize;
+ return NewBSS->S_;
+}
+
+// Get rom section for a variable. Currently there can be only one rom section
+// unless a variable explicitly requests a section.
+const MCSection *
+PIC16TargetObjectFile::getROSectionForGlobal(const GlobalVariable *GV) const {
+ ROSections[0]->Items.push_back(GV);
+ return ROSections[0]->S_;
}
+// Create initialized data section for a variable.
+const MCSection *
+PIC16TargetObjectFile::CreateIDATASectionForGlobal(const GlobalVariable *GV,
+ std::string Addr) const {
+ assert(GV->hasInitializer() && "This global doesn't need space");
+ assert(!GV->getInitializer()->isNullValue() &&
+ "initialized global has zero initializer");
+ assert(GV->getType()->getAddressSpace() == PIC16ISD::RAM_SPACE &&
+ "can be used for initialized RAM data only");
+
+ std::string Name;
+ // If address is given then create a section at that address else create a
+ // section by section name specified in GV.
+ PIC16Section *FoundIDATASec = NULL;
+ if (Addr.empty()) {
+ Name = GV->getSection() + " IDATA";
+ for (unsigned i = 0; i < IDATASections.size(); i++) {
+ if (IDATASections[i]->S_->getName() == Name) {
+ FoundIDATASec = IDATASections[i];
+ break;
+ }
+ }
+ } else {
+ std::string Prefix = GV->getNameStr() + "." + Addr + ".";
+ Name = PAN::getIdataSectionName(IDATASections.size(), Prefix) + " " + Addr;
+ }
+
+ PIC16Section *NewIDATASec = FoundIDATASec;
+ if (NewIDATASec == NULL) {
+ const MCSectionPIC16 *NewSection =
+ getPIC16Section(Name.c_str(), MCSectionPIC16::IDATA_Kind());
+ NewIDATASec = new PIC16Section(NewSection);
+ IDATASections.push_back(NewIDATASec);
+ }
+ // Insert the GV into this IDATA Section.
+ NewIDATASec->Items.push_back(GV);
+ // We do not want to put any GV without explicit section into this section
+ // so set its size to DatabankSize.
+ NewIDATASec->Size = DataBankSize;
+ return NewIDATASec->S_;
+}
+
+// Create a section in rom for a variable.
+const MCSection *
+PIC16TargetObjectFile::CreateROSectionForGlobal(const GlobalVariable *GV,
+ std::string Addr) const {
+ assert(GV->getType()->getAddressSpace() == PIC16ISD::ROM_SPACE &&
+ "can be used for ROM data only");
+
+ std::string Name;
+ // If address is given then create a section at that address else create a
+ // section by section name specified in GV.
+ PIC16Section *FoundROSec = NULL;
+ if (Addr.empty()) {
+ Name = GV->getSection() + " ROMDATA";
+ for (unsigned i = 1; i < ROSections.size(); i++) {
+ if (ROSections[i]->S_->getName() == Name) {
+ FoundROSec = ROSections[i];
+ break;
+ }
+ }
+ } else {
+ std::string Prefix = GV->getNameStr() + "." + Addr + ".";
+ Name = PAN::getRomdataSectionName(ROSections.size(), Prefix) + " " + Addr;
+ }
+
+ PIC16Section *NewRomSec = FoundROSec;
+ if (NewRomSec == NULL) {
+ const MCSectionPIC16 *NewSection =
+ getPIC16Section(Name.c_str(), MCSectionPIC16::ROMDATA_Kind());
+ NewRomSec = new PIC16Section(NewSection);
+ ROSections.push_back(NewRomSec);
+ }
+
+ // Insert the GV into this ROM Section.
+ NewRomSec->Items.push_back(GV);
+ return NewRomSec->S_;
+}
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