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https://github.com/c64scene-ar/llvm-6502.git
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58838 91177308-0d34-0410-b5e6-96231b3b80d8
202 lines
6.4 KiB
C++
202 lines
6.4 KiB
C++
//===-- XCoreTargetAsmInfo.cpp - XCore asm properties -----------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains the declarations of the XCoreTargetAsmInfo properties.
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// We use the small section flag for the CP relative and DP relative
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// flags. If a section is small and writable then it is DP relative. If a
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// section is small and not writable then it is CP relative.
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//
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//===----------------------------------------------------------------------===//
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#include "XCoreTargetAsmInfo.h"
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#include "XCoreTargetMachine.h"
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#include "llvm/GlobalVariable.h"
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#include "llvm/ADT/StringExtras.h"
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using namespace llvm;
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XCoreTargetAsmInfo::XCoreTargetAsmInfo(const XCoreTargetMachine &TM)
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: ELFTargetAsmInfo(TM),
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Subtarget(TM.getSubtargetImpl()) {
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TextSection = getUnnamedSection("\t.text", SectionFlags::Code);
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DataSection = getNamedSection("\t.dp.data", SectionFlags::Writeable |
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SectionFlags::Small);
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BSSSection_ = getNamedSection("\t.dp.bss", SectionFlags::Writeable |
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SectionFlags::BSS | SectionFlags::Small);
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if (Subtarget->isXS1A()) {
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ReadOnlySection = getNamedSection("\t.dp.rodata", SectionFlags::None |
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SectionFlags::Writeable |
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SectionFlags::Small);
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} else {
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ReadOnlySection = getNamedSection("\t.cp.rodata", SectionFlags::None |
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SectionFlags::Small);
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}
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Data16bitsDirective = "\t.short\t";
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Data32bitsDirective = "\t.long\t";
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Data64bitsDirective = 0;
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ZeroDirective = "\t.space\t";
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CommentString = "#";
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ConstantPoolSection = "\t.section\t.cp.rodata,\"ac\",@progbits";
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JumpTableDataSection = "\t.section\t.dp.data,\"awd\",@progbits";
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PrivateGlobalPrefix = ".L";
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AscizDirective = ".asciiz";
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WeakDefDirective = "\t.weak\t";
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WeakRefDirective = "\t.weak\t";
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SetDirective = "\t.set\t";
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// Debug
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HasLEB128 = true;
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AbsoluteDebugSectionOffsets = true;
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DwarfAbbrevSection = "\t.section\t.debug_abbrev,\"\",@progbits";
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DwarfInfoSection = "\t.section\t.debug_info,\"\",@progbits";
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DwarfLineSection = "\t.section\t.debug_line,\"\",@progbits";
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DwarfFrameSection = "\t.section\t.debug_frame,\"\",@progbits";
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DwarfPubNamesSection = "\t.section\t.debug_pubnames,\"\",@progbits";
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DwarfPubTypesSection = "\t.section\t.debug_pubtypes,\"\",@progbits";
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DwarfStrSection = "\t.section\t.debug_str,\"\",@progbits";
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DwarfLocSection = "\t.section\t.debug_loc,\"\",@progbits";
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DwarfARangesSection = "\t.section\t.debug_aranges,\"\",@progbits";
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DwarfRangesSection = "\t.section\t.debug_ranges,\"\",@progbits";
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DwarfMacInfoSection = "\t.section\t.debug_macinfo,\"\",@progbits";
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}
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const Section*
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XCoreTargetAsmInfo::SelectSectionForGlobal(const GlobalValue *GV) const {
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SectionKind::Kind Kind = SectionKindForGlobal(GV);
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if (const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV))
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{
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if (!GVar->mayBeOverridden()) {
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switch (Kind) {
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case SectionKind::RODataMergeStr:
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return MergeableStringSection(GVar);
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case SectionKind::RODataMergeConst:
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return getReadOnlySection();
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case SectionKind::ThreadData:
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return DataSection;
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case SectionKind::ThreadBSS:
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return getBSSSection_();
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default:
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break;
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}
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}
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}
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return ELFTargetAsmInfo::SelectSectionForGlobal(GV);
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}
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const Section*
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XCoreTargetAsmInfo::SelectSectionForMachineConst(const Type *Ty) const {
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return MergeableConstSection(Ty);
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}
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const Section*
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XCoreTargetAsmInfo::MergeableConstSection(const GlobalVariable *GV) const {
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Constant *C = GV->getInitializer();
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return MergeableConstSection(C->getType());
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}
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inline const Section*
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XCoreTargetAsmInfo::MergeableConstSection(const Type *Ty) const {
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const TargetData *TD = TM.getTargetData();
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unsigned Size = TD->getABITypeSize(Ty);
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if (Size == 4 || Size == 8 || Size == 16) {
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std::string Name = ".cp.const" + utostr(Size);
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return getNamedSection(Name.c_str(),
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SectionFlags::setEntitySize(SectionFlags::Mergeable |
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SectionFlags::Small,
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Size));
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}
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return getReadOnlySection();
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}
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const Section* XCoreTargetAsmInfo::
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MergeableStringSection(const GlobalVariable *GV) const {
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// FIXME insert in correct mergable section
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return getReadOnlySection();
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}
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unsigned XCoreTargetAsmInfo::
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SectionFlagsForGlobal(const GlobalValue *GV,
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const char* Name) const {
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unsigned Flags = ELFTargetAsmInfo::SectionFlagsForGlobal(GV, Name);
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// Mask out unsupported flags
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Flags &= ~(SectionFlags::Small | SectionFlags::TLS);
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// Set CP / DP relative flags
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if (GV) {
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SectionKind::Kind Kind = SectionKindForGlobal(GV);
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switch (Kind) {
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case SectionKind::ThreadData:
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case SectionKind::ThreadBSS:
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case SectionKind::Data:
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case SectionKind::BSS:
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case SectionKind::SmallData:
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case SectionKind::SmallBSS:
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Flags |= SectionFlags::Small;
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break;
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case SectionKind::ROData:
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case SectionKind::RODataMergeStr:
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case SectionKind::SmallROData:
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if (Subtarget->isXS1A()) {
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Flags |= SectionFlags::Writeable;
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}
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Flags |=SectionFlags::Small;
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break;
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case SectionKind::RODataMergeConst:
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Flags |=SectionFlags::Small;
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default:
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break;
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}
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}
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return Flags;
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}
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std::string XCoreTargetAsmInfo::
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printSectionFlags(unsigned flags) const {
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std::string Flags = ",\"";
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if (!(flags & SectionFlags::Debug))
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Flags += 'a';
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if (flags & SectionFlags::Code)
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Flags += 'x';
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if (flags & SectionFlags::Writeable)
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Flags += 'w';
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if (flags & SectionFlags::Mergeable)
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Flags += 'M';
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if (flags & SectionFlags::Strings)
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Flags += 'S';
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if (flags & SectionFlags::TLS)
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Flags += 'T';
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if (flags & SectionFlags::Small) {
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if (flags & SectionFlags::Writeable)
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Flags += 'd'; // DP relative
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else
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Flags += 'c'; // CP relative
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}
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Flags += "\",";
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Flags += '@';
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if (flags & SectionFlags::BSS)
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Flags += "nobits";
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else
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Flags += "progbits";
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if (unsigned entitySize = SectionFlags::getEntitySize(flags))
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Flags += "," + utostr(entitySize);
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return Flags;
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}
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