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Re-apply 84180 with the fixed test case.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84195 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Sanjiv Gupta
2009-10-15 19:26:25 +00:00
parent 6ad8c84d70
commit 753ec15d5f
11 changed files with 398 additions and 696 deletions
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481
lib/Target/PIC16/PIC16TargetObjectFile.cpp
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@ -8,9 +8,9 @@
//===----------------------------------------------------------------------===//
#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"
@ -19,75 +19,111 @@
using namespace llvm;
MCSectionPIC16 *MCSectionPIC16::Create(const StringRef &Name, SectionKind K,
int Address, int Color, MCContext &Ctx) {
return new (Ctx) MCSectionPIC16(Name, K, Address, Color);
PIC16TargetObjectFile::PIC16TargetObjectFile() {
}
/// 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 {
void MCSectionPIC16::PrintSwitchToSection(const MCAsmInfo &MAI,
raw_ostream &OS) const {
OS << getName() << '\n';
}
PIC16TargetObjectFile::PIC16TargetObjectFile()
: ExternalVarDecls(0), ExternalVarDefs(0) {
}
const MCSectionPIC16 *PIC16TargetObjectFile::
getPIC16Section(const char *Name, SectionKind Kind,
int Address, int Color) const {
MCSectionPIC16 *&Entry = SectionsByName[Name];
/// Return if we have an already existing one.
PIC16Section *&Entry = SectionsByName[Name];
if (Entry)
return Entry;
return Entry = MCSectionPIC16::Create(Name, Kind, Address, Color,
getContext());
Entry = PIC16Section::Create(Name, Ty, Address, Color, getContext());
return Entry;
}
/// 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;
}
/// 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];
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;
}
/// 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 = getPIC16Section("udata.# UDATA", MCSectionPIC16::UDATA_Kind());
ReadOnlySection = getPIC16Section("romdata.# ROMDATA",
MCSectionPIC16::ROMDATA_Kind());
DataSection = getPIC16Section("idata.# IDATA", MCSectionPIC16::IDATA_Kind());
// BSSSection = getPIC16DataSection("udata.#", UDATA);
// ReadOnlySection = getPIC16DataSection("romdata.#", ROMDATA);
// DataSection = getPIC16DataSection("idata.#", IDATA);
// Need because otherwise a .text symbol is emitted by DwarfWriter
// in BeginModule, and gpasm cribbs for that .text symbol.
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());
// FIXME: below
// TextSection = getPIC16DataSection("", UDATA);
ROMDATASection_ = NULL;
}
/// allocateUDATA - Allocate a un-initialized global to an existing or new UDATA
/// section and return that section.
const MCSection *
PIC16TargetObjectFile::getBSSSectionForGlobal(const GlobalVariable *GV) const {
PIC16TargetObjectFile::allocateUDATA(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");
@ -97,41 +133,37 @@ PIC16TargetObjectFile::getBSSSectionForGlobal(const GlobalVariable *GV) const {
const Type *Ty = C->getType();
unsigned ValSize = TD->getTypeAllocSize(Ty);
// Go through all BSS Sections and assign this variable
// Go through all UDATA Sections and assign this variable
// to the first available section having enough space.
PIC16Section *FoundBSS = NULL;
for (unsigned i = 0; i < BSSSections.size(); i++) {
if (DataBankSize - BSSSections[i]->Size >= ValSize) {
FoundBSS = BSSSections[i];
PIC16Section *Found = NULL;
for (unsigned i = 0; i < UDATASections_.size(); i++) {
if (DataBankSize - UDATASections_[i]->getSize() >= ValSize) {
Found = UDATASections_[i];
break;
}
}
// 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);
// 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);
}
// Insert the GV into this BSS.
FoundBSS->Items.push_back(GV);
FoundBSS->Size += ValSize;
return FoundBSS->S_;
// Insert the GV into this UDATA section.
Found->Items.push_back(GV);
Found->setSize(Found->getSize() + ValSize);
return Found;
}
/// allocateIDATA - allocate an initialized global into an existing
/// or new section and return that section.
const MCSection *
PIC16TargetObjectFile::getIDATASectionForGlobal(const GlobalVariable *GV) const{
PIC16TargetObjectFile::allocateIDATA(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 split initialized RAM data only");
"can allocate initialized RAM data only");
// Find how much space this global needs.
const TargetData *TD = TM->getTargetData();
@ -140,64 +172,47 @@ PIC16TargetObjectFile::getIDATASectionForGlobal(const GlobalVariable *GV) const{
// Go through all IDATA Sections and assign this variable
// to the first available section having enough space.
PIC16Section *FoundIDATA = NULL;
for (unsigned i = 0; i < IDATASections.size(); i++) {
if (DataBankSize - IDATASections[i]->Size >= ValSize) {
FoundIDATA = IDATASections[i];
PIC16Section *Found = NULL;
for (unsigned i = 0; i < IDATASections_.size(); i++) {
if (DataBankSize - IDATASections_[i]->getSize() >= ValSize) {
Found = IDATASections_[i];
break;
}
}
// No IDATA section spacious enough was found. Crate a new one.
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);
if (!Found) {
std::string name = PAN::getIdataSectionName(IDATASections_.size());
Found = getPIC16DataSection(name.c_str(), IDATA);
}
// Insert the GV into this IDATA.
FoundIDATA->Items.push_back(GV);
FoundIDATA->Size += ValSize;
return FoundIDATA->S_;
Found->Items.push_back(GV);
Found->setSize(Found->getSize() + ValSize);
return Found;
}
// 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::getSectionForAuto(const GlobalVariable *GV) const {
PIC16TargetObjectFile::allocateAUTO(const GlobalVariable *GV) const {
const std::string name = PAN::getSectionNameForSym(GV->getName());
PIC16Section *S = getPIC16AutoSection(name.c_str());
// 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_;
S->Items.push_back(GV);
return S;
}
@ -214,56 +229,50 @@ PIC16TargetObjectFile::SelectSectionForGlobal(const GlobalValue *GV1,
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 getSectionForAuto(GV);
// Record Exteranl Var Defs.
if (GV->hasExternalLinkage() || GV->hasCommonLinkage())
ExternalVarDefs->Items.push_back(GV);
return allocateAUTO(GV);
// See if this is an uninitialized global.
const Constant *C = GV->getInitializer();
if (C->isNullValue())
return getBSSSectionForGlobal(GV);
return allocateUDATA(GV);
// If this is initialized data in RAM. Put it in the correct IDATA section.
if (GV->getType()->getAddressSpace() == PIC16ISD::RAM_SPACE)
return getIDATASectionForGlobal(GV);
return allocateIDATA(GV);
// This is initialized data in rom, put it in the readonly section.
if (GV->getType()->getAddressSpace() == PIC16ISD::ROM_SPACE)
return getROSectionForGlobal(GV);
return allocateROMDATA(GV);
// Else let the default implementation take care of it.
return TargetLoweringObjectFile::SelectSectionForGlobal(GV, Kind, Mang,TM);
}
PIC16TargetObjectFile::~PIC16TargetObjectFile() {
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;
#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
}
/// getSpecialCasedSectionGlobals - Allow the target to completely override
/// getExplicitSectionGlobal - Allow the target to completely override
/// section assignment of a global.
const MCSection *PIC16TargetObjectFile::
getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
@ -274,167 +283,83 @@ 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 CreateSectionForGlobal(GVar, Mang, SectAddr);
return allocateAtGivenAddress(GVar, SectAddr);
}
// Create the section specified with section attribute.
return CreateSectionForGlobal(GVar, Mang);
return allocateInGivenSection(GVar);
}
return getPIC16Section(GV->getSection().c_str(), Kind);
return getPIC16DataSection(GV->getSection().c_str(), UDATA);
}
// Create a new section for global variable. If Addr is given then create
// section at that address else create by name.
// 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.
const MCSection *
PIC16TargetObjectFile::CreateSectionForGlobal(const GlobalVariable *GV,
Mangler *Mang,
const std::string &Addr) const {
PIC16TargetObjectFile::allocateInGivenSection(const GlobalVariable *GV) const {
// Determine the type of section that we need to create.
PIC16SectionType SecTy;
// See if this is an uninitialized global.
const Constant *C = GV->getInitializer();
if (C->isNullValue())
return CreateBSSSectionForGlobal(GV, Addr);
SecTy = UDATA;
// If this is initialized data in RAM. Put it in the correct IDATA section.
if (GV->getType()->getAddressSpace() == PIC16ISD::RAM_SPACE)
return CreateIDATASectionForGlobal(GV, Addr);
else if (GV->getType()->getAddressSpace() == PIC16ISD::RAM_SPACE)
SecTy = IDATA;
// This is initialized data in rom, put it in the readonly section.
if (GV->getType()->getAddressSpace() == PIC16ISD::ROM_SPACE)
return CreateROSectionForGlobal(GV, Addr);
else if (GV->getType()->getAddressSpace() == PIC16ISD::ROM_SPACE)
SecTy = ROMDATA;
else
llvm_unreachable ("Could not determine section type for global");
// Else let the default implementation take care of it.
return TargetLoweringObjectFile::SectionForGlobal(GV, Mang, *TM);
PIC16Section *S = getPIC16UserSection(GV->getSection().c_str(), SecTy);
S->Items.push_back(GV);
return S;
}
// Create uninitialized section for a variable.
// Allocate a global var in a new absolute sections at given address.
const MCSection *
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);
}
PIC16TargetObjectFile::allocateAtGivenAddress(const GlobalVariable *GV,
const std::string &Addr) const {
// Determine the type of section that we need to create.
PIC16SectionType SecTy;
// Insert the GV into this BSS.
NewBSS->Items.push_back(GV);
// 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");
// 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_;
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;
}
// 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_;
}