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Run through the list of globals once and sectionize all types of globlas includeing declarations. Later emit them from their section lists.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71661 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Sanjiv Gupta 2009-05-13 15:13:17 +00:00
parent e4eb2d2b57
commit ad6585b021
4 changed files with 76 additions and 42 deletions
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83
lib/Target/PIC16/PIC16AsmPrinter.cpp
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@ -133,7 +133,7 @@ void PIC16AsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
// If its a libcall name, record it to decls section.
if (PAN::getSymbolTag(Sname) == PAN::LIBCALL) {
Decls.push_back(Sname);
LibcallDecls.push_back(Sname);
}
O << Sname;
@ -153,16 +153,16 @@ void PIC16AsmPrinter::printCCOperand(const MachineInstr *MI, int opNum) {
O << PIC16CondCodeToString((PIC16CC::CondCodes)CC);
}
void PIC16AsmPrinter::printDecls(void) {
void PIC16AsmPrinter::printLibcallDecls(void) {
// If no libcalls used, return.
if (Decls.empty()) return;
if (LibcallDecls.empty()) return;
O << TAI->getCommentString() << "External decls for libcalls - BEGIN." <<"\n";
// Remove duplicate entries.
Decls.sort();
Decls.unique();
for (std::list<const char*>::const_iterator I = Decls.begin();
I != Decls.end(); I++) {
LibcallDecls.sort();
LibcallDecls.unique();
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";
@ -188,17 +188,22 @@ bool PIC16AsmPrinter::doInitialization (Module &M) {
I->setSection(TAI->SectionForGlobal(I)->getName());
}
EmitExternsAndGlobals (M);
EmitFunctionDecls(M);
EmitUndefinedVars(M);
EmitDefinedVars(M);
EmitIData(M);
EmitUData(M);
EmitAutos(M);
EmitRomData(M);
EmitAutos(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 << TAI->getCommentString() << "External defs and decls - BEGIN." <<"\n";
O << 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 (Name.compare("@abort") == 0)
@ -219,33 +224,38 @@ void PIC16AsmPrinter::EmitExternsAndGlobals (Module &M) {
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;
if (!(I->isDeclaration() || I->hasExternalLinkage() ||
I->hasCommonLinkage()))
continue;
const char *directive = I->isDeclaration() ? TAI->getExternDirective() :
TAI->getGlobalDirective();
O << directive << Name << "\n";
}
O << TAI->getCommentString() << "External defs and decls - END." <<"\n";
O << TAI->getCommentString() << "Function Declarations - END." <<"\n";
}
// Emit variables imported from other Modules.
void PIC16AsmPrinter::EmitUndefinedVars (Module &M)
{
std::vector<const GlobalVariable*> Items = PTAI->ExternalVarDecls->Items;
if (! Items.size()) return;
O << "\n" << TAI->getCommentString() << "Imported Variables - BEGIN" << "\n";
for (unsigned j = 0; j < Items.size(); j++) {
O << TAI->getExternDirective() << Mang->getValueName(Items[j]) << "\n";
}
O << TAI->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 = PTAI->ExternalVarDefs->Items;
if (! Items.size()) return;
O << "\n" << TAI->getCommentString() << "Exported Variables - BEGIN" << "\n";
for (unsigned j = 0; j < Items.size(); j++) {
O << TAI->getGlobalDirective() << Mang->getValueName(Items[j]) << "\n";
}
O << TAI->getCommentString() << "Exported Variables - END" << "\n";
}
// Emit initialized data placed in ROM.
void PIC16AsmPrinter::EmitRomData (Module &M)
{
const PIC16TargetAsmInfo *PTAI = static_cast<const PIC16TargetAsmInfo *>(TAI);
std::vector<const GlobalVariable*> Items = PTAI->ROSection->Items;
if (! Items.size()) return;
@ -262,7 +272,7 @@ void PIC16AsmPrinter::EmitRomData (Module &M)
}
bool PIC16AsmPrinter::doFinalization(Module &M) {
printDecls();
printLibcallDecls();
O << "\t" << "END\n";
bool Result = AsmPrinter::doFinalization(M);
return Result;
@ -314,7 +324,6 @@ void PIC16AsmPrinter::emitFunctionData(MachineFunction &MF) {
}
void PIC16AsmPrinter::EmitIData (Module &M) {
const PIC16TargetAsmInfo *PTAI = static_cast<const PIC16TargetAsmInfo *>(TAI);
// Print all IDATA sections.
std::vector <PIC16Section *>IDATASections = PTAI->IDATASections;
@ -333,7 +342,6 @@ void PIC16AsmPrinter::EmitIData (Module &M) {
}
void PIC16AsmPrinter::EmitUData (Module &M) {
const PIC16TargetAsmInfo *PTAI = static_cast<const PIC16TargetAsmInfo *>(TAI);
const TargetData *TD = TM.getTargetData();
// Print all BSS sections.
@ -358,7 +366,6 @@ void PIC16AsmPrinter::EmitAutos (Module &M)
{
// Section names for all globals are already set.
const PIC16TargetAsmInfo *PTAI = static_cast<const PIC16TargetAsmInfo *>(TAI);
const TargetData *TD = TM.getTargetData();
// Now print all Autos sections.

11
lib/Target/PIC16/PIC16AsmPrinter.h
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@ -17,6 +17,7 @@
#include "PIC16.h"
#include "PIC16TargetMachine.h"
#include "PIC16TargetAsmInfo.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Target/TargetAsmInfo.h"
@ -31,6 +32,7 @@ namespace llvm {
bool V)
: AsmPrinter(O, TM, T, OL, V) {
PTLI = TM.getTargetLowering();
PTAI = static_cast<const PIC16TargetAsmInfo *> (T);
}
private :
virtual const char *getPassName() const {
@ -42,13 +44,15 @@ namespace llvm {
void printCCOperand(const MachineInstr *MI, int opNum);
bool printInstruction(const MachineInstr *MI); // definition autogenerated.
bool printMachineInstruction(const MachineInstr *MI);
void EmitExternsAndGlobals (Module &M);
void EmitFunctionDecls (Module &M);
void EmitUndefinedVars (Module &M);
void EmitDefinedVars (Module &M);
void EmitIData (Module &M);
void EmitUData (Module &M);
void EmitAutos (Module &M);
void EmitRomData (Module &M);
void emitFunctionData(MachineFunction &MF);
void printDecls(void);
void printLibcallDecls(void);
protected:
bool doInitialization(Module &M);
@ -56,7 +60,8 @@ namespace llvm {
private:
PIC16TargetLowering *PTLI;
std::list<const char *> Decls; // List of extern decls.
const PIC16TargetAsmInfo *PTAI;
std::list<const char *> LibcallDecls; // List of extern decls.
};
} // end of namespace

20
lib/Target/PIC16/PIC16TargetAsmInfo.cpp
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@ -45,6 +45,8 @@ PIC16TargetAsmInfo(const PIC16TargetMachine &TM)
// in BeginModule, and gpasm cribbs for that .text symbol.
TextSection = getUnnamedSection("", SectionFlags::Code);
ROSection = new PIC16Section(getReadOnlySection());
ExternalVarDecls = new PIC16Section(getNamedSection("ExternalVarDecls"));
ExternalVarDefs = new PIC16Section(getNamedSection("ExternalVarDefs"));
}
const char *PIC16TargetAsmInfo::getRomDirective(unsigned size) const
@ -196,9 +198,18 @@ PIC16TargetAsmInfo::SelectSectionForGlobal(const GlobalValue *GV1) const {
// We select the section based on the initializer here, so it really
// has to be a GlobalVariable.
const GlobalVariable *GV = dyn_cast<GlobalVariable>(GV1);
if (!GV1 || ! GV->hasInitializer())
if (!GV)
return TargetAsmInfo::SelectSectionForGlobal(GV1);
// Record Exteranl 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.
const std::string name = GV->getName();
@ -206,6 +217,11 @@ PIC16TargetAsmInfo::SelectSectionForGlobal(const GlobalValue *GV1) const {
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())
@ -240,4 +256,6 @@ PIC16TargetAsmInfo::~PIC16TargetAsmInfo() {
}
delete ROSection;
delete ExternalVarDecls;
delete ExternalVarDefs;
}

4
lib/Target/PIC16/PIC16TargetAsmInfo.h
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@ -45,6 +45,8 @@ namespace llvm {
mutable std::vector<PIC16Section *> IDATASections;
mutable std::vector<PIC16Section *> AutosSections;
mutable PIC16Section *ROSection;
mutable PIC16Section *ExternalVarDecls;
mutable PIC16Section *ExternalVarDefs;
virtual ~PIC16TargetAsmInfo();
private:
@ -57,6 +59,8 @@ namespace llvm {
const Section *getIDATASectionForGlobal(const GlobalVariable *GV) const;
const Section *getSectionForAuto(const GlobalVariable *GV) const;
virtual const Section *SelectSectionForGlobal(const GlobalValue *GV) const;
public:
void SetSectionForGVs(Module &M);
std::vector<PIC16Section *> getBSSSections() const {