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//===-- XCoreTargetAsmInfo.cpp - XCore asm properties -----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the declarations of the XCoreTargetAsmInfo properties.
// We use the small section flag for the CP relative and DP relative
// flags. If a section is small and writable then it is DP relative. If a
// section is small and not writable then it is CP relative.
//
//===----------------------------------------------------------------------===//
#include "XCoreTargetAsmInfo.h"
#include "XCoreTargetMachine.h"
#include "llvm/GlobalVariable.h"
#include "llvm/ADT/StringExtras.h"
using namespace llvm;
XCoreTargetAsmInfo::XCoreTargetAsmInfo(const XCoreTargetMachine &TM)
: ELFTargetAsmInfo(TM),
Subtarget(TM.getSubtargetImpl()) {
TextSection = getUnnamedSection("\t.text", SectionFlags::Code);
DataSection = getNamedSection("\t.dp.data", SectionFlags::Writeable |
SectionFlags::Small);
BSSSection_ = getNamedSection("\t.dp.bss", SectionFlags::Writeable |
SectionFlags::BSS | SectionFlags::Small);
if (Subtarget->isXS1A()) {
ReadOnlySection = getNamedSection("\t.dp.rodata", SectionFlags::None |
SectionFlags::Writeable |
SectionFlags::Small);
} else {
ReadOnlySection = getNamedSection("\t.cp.rodata", SectionFlags::None |
SectionFlags::Small);
}
Data16bitsDirective = "\t.short\t";
Data32bitsDirective = "\t.long\t";
Data64bitsDirective = 0;
ZeroDirective = "\t.space\t";
CommentString = "#";
ConstantPoolSection = "\t.section\t.cp.rodata,\"ac\",@progbits";
JumpTableDataSection = "\t.section\t.dp.data,\"awd\",@progbits";
PrivateGlobalPrefix = ".L";
AscizDirective = ".asciiz";
WeakDefDirective = "\t.weak\t";
WeakRefDirective = "\t.weak\t";
SetDirective = "\t.set\t";
// Debug
HasLEB128 = true;
AbsoluteDebugSectionOffsets = true;
DwarfAbbrevSection = "\t.section\t.debug_abbrev,\"\",@progbits";
DwarfInfoSection = "\t.section\t.debug_info,\"\",@progbits";
DwarfLineSection = "\t.section\t.debug_line,\"\",@progbits";
DwarfFrameSection = "\t.section\t.debug_frame,\"\",@progbits";
DwarfPubNamesSection = "\t.section\t.debug_pubnames,\"\",@progbits";
DwarfPubTypesSection = "\t.section\t.debug_pubtypes,\"\",@progbits";
DwarfStrSection = "\t.section\t.debug_str,\"\",@progbits";
DwarfLocSection = "\t.section\t.debug_loc,\"\",@progbits";
DwarfARangesSection = "\t.section\t.debug_aranges,\"\",@progbits";
DwarfRangesSection = "\t.section\t.debug_ranges,\"\",@progbits";
DwarfMacInfoSection = "\t.section\t.debug_macinfo,\"\",@progbits";
}
const Section*
XCoreTargetAsmInfo::SelectSectionForGlobal(const GlobalValue *GV) const {
SectionKind::Kind Kind = SectionKindForGlobal(GV);
if (const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV))
{
if (!GVar->isWeakForLinker()) {
switch (Kind) {
case SectionKind::RODataMergeStr:
return MergeableStringSection(GVar);
case SectionKind::RODataMergeConst:
return getReadOnlySection();
case SectionKind::ThreadData:
return DataSection;
case SectionKind::ThreadBSS:
return getBSSSection_();
default:
break;
}
}
}
return ELFTargetAsmInfo::SelectSectionForGlobal(GV);
}
const Section*
XCoreTargetAsmInfo::SelectSectionForMachineConst(const Type *Ty) const {
return MergeableConstSection(Ty);
}
const Section*
XCoreTargetAsmInfo::MergeableConstSection(const GlobalVariable *GV) const {
Constant *C = GV->getInitializer();
return MergeableConstSection(C->getType());
}
inline const Section*
XCoreTargetAsmInfo::MergeableConstSection(const Type *Ty) const {
const TargetData *TD = TM.getTargetData();
unsigned Size = TD->getTypeAllocSize(Ty);
if (Size == 4 || Size == 8 || Size == 16) {
std::string Name = ".cp.const" + utostr(Size);
return getNamedSection(Name.c_str(),
SectionFlags::setEntitySize(SectionFlags::Mergeable |
SectionFlags::Small,
Size));
}
return getReadOnlySection();
}
const Section* XCoreTargetAsmInfo::
MergeableStringSection(const GlobalVariable *GV) const {
// FIXME insert in correct mergable section
return getReadOnlySection();
}
unsigned XCoreTargetAsmInfo::
SectionFlagsForGlobal(const GlobalValue *GV,
const char* Name) const {
unsigned Flags = ELFTargetAsmInfo::SectionFlagsForGlobal(GV, Name);
// Mask out unsupported flags
Flags &= ~(SectionFlags::Small | SectionFlags::TLS);
// Set CP / DP relative flags
if (GV) {
SectionKind::Kind Kind = SectionKindForGlobal(GV);
switch (Kind) {
case SectionKind::ThreadData:
case SectionKind::ThreadBSS:
case SectionKind::Data:
case SectionKind::BSS:
case SectionKind::SmallData:
case SectionKind::SmallBSS:
Flags |= SectionFlags::Small;
break;
case SectionKind::ROData:
case SectionKind::RODataMergeStr:
case SectionKind::SmallROData:
if (Subtarget->isXS1A()) {
Flags |= SectionFlags::Writeable;
}
Flags |=SectionFlags::Small;
break;
case SectionKind::RODataMergeConst:
Flags |=SectionFlags::Small;
default:
break;
}
}
return Flags;
}
std::string XCoreTargetAsmInfo::
printSectionFlags(unsigned flags) const {
std::string Flags = ",\"";
if (!(flags & SectionFlags::Debug))
Flags += 'a';
if (flags & SectionFlags::Code)
Flags += 'x';
if (flags & SectionFlags::Writeable)
Flags += 'w';
if (flags & SectionFlags::Mergeable)
Flags += 'M';
if (flags & SectionFlags::Strings)
Flags += 'S';
if (flags & SectionFlags::TLS)
Flags += 'T';
if (flags & SectionFlags::Small) {
if (flags & SectionFlags::Writeable)
Flags += 'd'; // DP relative
else
Flags += 'c'; // CP relative
}
Flags += "\",";
Flags += '@';
if (flags & SectionFlags::BSS)
Flags += "nobits";
else
Flags += "progbits";
if (unsigned entitySize = SectionFlags::getEntitySize(flags))
Flags += "," + utostr(entitySize);
return Flags;
}
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