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Switch MIPS to new ELFTargetAsmInfo. Add few FIXMEs.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53790 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Anton Korobeynikov 2008-07-19 13:16:11 +00:00
parent cff2ea06af
commit ae408e6f1e
4 changed files with 116 additions and 140 deletions
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1
lib/Target/DarwinTargetAsmInfo.cpp
View File

@ -32,6 +32,7 @@ DarwinTargetAsmInfo::DarwinTargetAsmInfo(const TargetMachine &TM) {
SectionFlags::Mergeable);
EightByteConstantSection_ = getUnnamedSection("\t.literal8\n",
SectionFlags::Mergeable);
// Note: 16-byte constant section is subtarget specific and should be provided
// there.

247
lib/Target/Mips/MipsAsmPrinter.cpp
View File

@ -58,12 +58,13 @@ namespace {
return "Mips Assembly Printer";
}
virtual std::string getSectionForFunction(const Function &F) const;
void printOperand(const MachineInstr *MI, int opNum);
void printMemOperand(const MachineInstr *MI, int opNum,
const char *Modifier = 0);
void printFCCOperand(const MachineInstr *MI, int opNum,
const char *Modifier = 0);
void printModuleLevelGV(const GlobalVariable* GVar);
unsigned int getSavedRegsBitmask(bool isFloat, MachineFunction &MF);
void printHex32(unsigned int Value);
@ -73,7 +74,7 @@ namespace {
void emitFrameDirective(MachineFunction &MF);
void emitMaskDirective(MachineFunction &MF);
void emitFMaskDirective(MachineFunction &MF);
bool printInstruction(const MachineInstr *MI); // autogenerated.
bool runOnMachineFunction(MachineFunction &F);
bool doInitialization(Module &M);
@ -241,13 +242,18 @@ emitCurrentABIString(void)
return NULL;
}
// Substitute old hook with new one temporary
std::string MipsAsmPrinter::getSectionForFunction(const Function &F) const {
return TAI->SectionForGlobal(&F);
}
/// Emit the directives used by GAS on the start of functions
void MipsAsmPrinter::
emitFunctionStart(MachineFunction &MF)
{
// Print out the label for the function.
const Function *F = MF.getFunction();
SwitchToTextSection(getSectionForFunction(*F).c_str(), F);
SwitchToTextSection(TAI->SectionForGlobal(F).c_str());
// 2 bits aligned
EmitAlignment(2, F);
@ -467,145 +473,112 @@ doInitialization(Module &M)
return false; // success
}
bool MipsAsmPrinter::
doFinalization(Module &M)
{
void MipsAsmPrinter::
printModuleLevelGV(const GlobalVariable* GVar) {
const TargetData *TD = TM.getTargetData();
if (!GVar->hasInitializer())
return; // External global require no code
// Check to see if this is a special global used by LLVM, if so, emit it.
if (EmitSpecialLLVMGlobal(GVar))
return;
O << "\n\n";
std::string SectionName = TAI->SectionForGlobal(GVar);
std::string name = Mang->getValueName(GVar);
Constant *C = GVar->getInitializer();
const Type *CTy = C->getType();
unsigned Size = TD->getABITypeSize(CTy);
bool printSizeAndType = true;
// A data structure or array is aligned in memory to the largest
// alignment boundary required by any data type inside it (this matches
// the Preferred Type Alignment). For integral types, the alignment is
// the type size.
//unsigned Align = TD->getPreferredAlignmentLog(I);
//unsigned Align = TD->getPrefTypeAlignment(C->getType());
unsigned Align;
if (CTy->getTypeID() == Type::IntegerTyID ||
CTy->getTypeID() == Type::VoidTyID) {
assert(!(Size & (Size-1)) && "Alignment is not a power of two!");
Align = Log2_32(Size);
} else
Align = TD->getPreferredTypeAlignmentShift(CTy);
// FIXME: ELF supports visibility
SwitchToDataSection(SectionName.c_str());
if (C->isNullValue() && !GVar->hasSection()) {
if (!GVar->isThreadLocal() &&
(GVar->hasInternalLinkage() || GVar->isWeakForLinker())) {
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
if (GVar->hasInternalLinkage()) {
if (TAI->getLCOMMDirective())
O << TAI->getLCOMMDirective() << name << ',' << Size;
else
O << "\t.local\t" << name << '\n';
} else {
O << TAI->getCOMMDirective() << name << ',' << Size;
// The .comm alignment in bytes.
if (TAI->getCOMMDirectiveTakesAlignment())
O << ',' << (TAI->getAlignmentIsInBytes() ? (1 << Align) : Align);
}
O << '\n';
return;
}
}
switch (GVar->getLinkage()) {
case GlobalValue::LinkOnceLinkage:
case GlobalValue::CommonLinkage:
case GlobalValue::WeakLinkage:
// FIXME: Verify correct for weak.
// Nonnull linkonce -> weak
O << "\t.weak " << name << "\n";
break;
case GlobalValue::AppendingLinkage:
// FIXME: appending linkage variables should go into a section of their name
// or something. For now, just emit them as external.
case GlobalValue::ExternalLinkage:
// If external or appending, declare as a global symbol
O << TAI->getGlobalDirective() << name << "\n";
// Fall Through
case GlobalValue::InternalLinkage:
break;
case GlobalValue::GhostLinkage:
cerr << "Should not have any unmaterialized functions!\n";
abort();
case GlobalValue::DLLImportLinkage:
cerr << "DLLImport linkage is not supported by this target!\n";
abort();
case GlobalValue::DLLExportLinkage:
cerr << "DLLExport linkage is not supported by this target!\n";
abort();
default:
assert(0 && "Unknown linkage type!");
}
if (Align)
O << "\t.align " << Align << "\n";
if (TAI->hasDotTypeDotSizeDirective() && printSizeAndType) {
O << "\t.type " << name << ",@object\n";
O << "\t.size " << name << "," << Size << "\n";
}
O << name << ":\n";
EmitGlobalConstant(C);
}
bool MipsAsmPrinter::
doFinalization(Module &M)
{
// Print out module-level global variables here.
for (Module::const_global_iterator I = M.global_begin(),
E = M.global_end(); I != E; ++I)
// External global require no code
if (I->hasInitializer()) {
// Check to see if this is a special global
// used by LLVM, if so, emit it.
if (EmitSpecialLLVMGlobal(I))
continue;
O << "\n\n";
std::string name = Mang->getValueName(I);
Constant *C = I->getInitializer();
const Type *CTy = C->getType();
unsigned Size = TD->getABITypeSize(CTy);
bool printSizeAndType = true;
// A data structure or array is aligned in memory to the largest
// alignment boundary required by any data type inside it (this matches
// the Preferred Type Alignment). For integral types, the alignment is
// the type size.
//unsigned Align = TD->getPreferredAlignmentLog(I);
//unsigned Align = TD->getPrefTypeAlignment(C->getType());
unsigned Align;
if (CTy->getTypeID() == Type::IntegerTyID ||
CTy->getTypeID() == Type::VoidTyID) {
assert(!(Size & (Size-1)) && "Alignment is not a power of two!");
Align = Log2_32(Size);
} else
Align = TD->getPreferredTypeAlignmentShift(CTy);
// Is this correct ?
if (C->isNullValue() && (I->hasLinkOnceLinkage() ||
I->hasInternalLinkage() || I->hasWeakLinkage() ||
I->hasCommonLinkage()))
{
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
if (!NoZerosInBSS && TAI->getBSSSection())
SwitchToDataSection(TAI->getBSSSection(), I);
else
SwitchToDataSection(TAI->getDataSection(), I);
if (I->hasInternalLinkage()) {
if (TAI->getLCOMMDirective())
O << TAI->getLCOMMDirective() << name << "," << Size;
else
O << "\t.local\t" << name << "\n";
} else {
O << TAI->getCOMMDirective() << name << "," << Size;
// The .comm alignment in bytes.
if (TAI->getCOMMDirectiveTakesAlignment())
O << "," << (1 << Align);
}
} else {
switch (I->getLinkage())
{
case GlobalValue::LinkOnceLinkage:
case GlobalValue::CommonLinkage:
case GlobalValue::WeakLinkage:
// FIXME: Verify correct for weak.
// Nonnull linkonce -> weak
O << "\t.weak " << name << "\n";
SwitchToDataSection("", I);
O << "\t.section\t\".llvm.linkonce.d." << name
<< "\",\"aw\",@progbits\n";
break;
case GlobalValue::AppendingLinkage:
// FIXME: appending linkage variables
// should go into a section of their name or
// something. For now, just emit them as external.
case GlobalValue::ExternalLinkage:
// If external or appending, declare as a global symbol
O << TAI->getGlobalDirective() << name << "\n";
// Fall Through
case GlobalValue::InternalLinkage:
// FIXME: special handling for ".ctors" & ".dtors" sections
if (I->hasSection() && (I->getSection() == ".ctors" ||
I->getSection() == ".dtors")) {
std::string SectionName = ".section " + I->getSection();
SectionName += ",\"aw\",%progbits";
SwitchToDataSection(SectionName.c_str());
} else {
if (C->isNullValue() && !NoZerosInBSS && TAI->getBSSSection())
SwitchToDataSection(TAI->getBSSSection(), I);
else if (!I->isConstant())
SwitchToDataSection(TAI->getDataSection(), I);
else {
// Read-only data. We have two possible scenary here
// 1) Readonly section for strings (char arrays).
// 2) for other types.
if (TAI->getReadOnlySection()) {
const ConstantArray *CVA = dyn_cast<ConstantArray>(C);
if (CVA && CVA->isString()) {
std::string SectionName = "\t.section\t.rodata.str1.4,"
"\"aMS\",@progbits,1";
SwitchToDataSection(SectionName.c_str());
printSizeAndType = false;
break;
}
SwitchToDataSection(TAI->getReadOnlySection(), I);
} else
SwitchToDataSection(TAI->getDataSection(), I);
}
}
break;
case GlobalValue::GhostLinkage:
cerr << "Should not have any unmaterialized functions!\n";
abort();
case GlobalValue::DLLImportLinkage:
cerr << "DLLImport linkage is not supported by this target!\n";
abort();
case GlobalValue::DLLExportLinkage:
cerr << "DLLExport linkage is not supported by this target!\n";
abort();
default:
assert(0 && "Unknown linkage type!");
}
if (Align)
O << "\t.align " << Align << "\n";
if (TAI->hasDotTypeDotSizeDirective() && printSizeAndType) {
O << "\t.type " << name << ",@object\n";
O << "\t.size " << name << "," << Size << "\n";
}
O << name << ":\n";
EmitGlobalConstant(C);
}
}
printModuleLevelGV(I);
O << "\n";

5
lib/Target/Mips/MipsTargetAsmInfo.cpp
View File

@ -16,7 +16,8 @@
using namespace llvm;
MipsTargetAsmInfo::MipsTargetAsmInfo(const MipsTargetMachine &TM) {
MipsTargetAsmInfo::MipsTargetAsmInfo(const MipsTargetMachine &TM):
ELFTargetAsmInfo(TM) {
AlignmentIsInBytes = false;
COMMDirectiveTakesAlignment = true;
@ -33,7 +34,7 @@ MipsTargetAsmInfo::MipsTargetAsmInfo(const MipsTargetMachine &TM) {
if (!TM.getSubtarget<MipsSubtarget>().hasABICall())
JumpTableDirective = "\t.word\t";
else
else
JumpTableDirective = "\t.gpword\t";
}

3
lib/Target/Mips/MipsTargetAsmInfo.h
View File

@ -15,13 +15,14 @@
#define MIPSTARGETASMINFO_H
#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Target/ELFTargetAsmInfo.h"
namespace llvm {
// Forward declaration.
class MipsTargetMachine;
struct MipsTargetAsmInfo : public TargetAsmInfo {
struct MipsTargetAsmInfo : public ELFTargetAsmInfo {
explicit MipsTargetAsmInfo(const MipsTargetMachine &TM);
};