X86DarwinTargetAsmInfo::X86DarwinTargetAsmInfo(const X86TargetMachine &TM):
X86TargetAsmInfo<DarwinTargetAsmInfo>(TM) {
- const X86Subtarget* Subtarget = &TM.getSubtarget<X86Subtarget>();
+ const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
bool is64Bit = Subtarget->is64Bit();
AlignmentIsInBytes = false;
TextAlignFillValue = 0x90;
-
-
+
+
if (!is64Bit)
Data64bitsDirective = 0; // we can't emit a 64-bit unit
ZeroDirective = "\t.space\t"; // ".space N" emits N zeros.
ZeroFillDirective = "\t.zerofill\t"; // Uses .zerofill
- if (TM.getRelocationModel() != Reloc::Static)
- ConstantPoolSection = "\t.const_data";
- else
- ConstantPoolSection = "\t.const\n";
- // FIXME: Why don't we always use this section?
- if (is64Bit)
- SixteenByteConstantSection = getUnnamedSection("\t.literal16\n",
- SectionFlags::Mergeable);
LCOMMDirective = "\t.lcomm\t";
+
// Leopard and above support aligned common symbols.
COMMDirectiveTakesAlignment = (Subtarget->getDarwinVers() >= 9);
HasDotTypeDotSizeDirective = false;
- NonLocalEHFrameLabel = true;
+
if (is64Bit) {
PersonalityPrefix = "";
PersonalitySuffix = "+4@GOTPCREL";
PersonalityPrefix = "L";
PersonalitySuffix = "$non_lazy_ptr";
}
+
InlineAsmStart = "## InlineAsm Start";
InlineAsmEnd = "## InlineAsm End";
CommentString = "##";
ProtectedDirective = "\t.globl\t";
SupportsDebugInformation = true;
-
- DwarfDebugInlineSection = ".section __DWARF,__debug_inlined,regular,debug";
DwarfUsesInlineInfoSection = true;
// Exceptions handling
GlobalEHDirective = "\t.globl\t";
SupportsWeakOmittedEHFrame = false;
AbsoluteEHSectionOffsets = false;
- DwarfEHFrameSection =
- ".section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support";
- DwarfExceptionSection = ".section __DATA,__gcc_except_tab";
-}
-
-unsigned
-X86DarwinTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
- bool Global) const {
- if (Reason == DwarfEncoding::Functions && Global)
- return (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4);
- else if (Reason == DwarfEncoding::CodeLabels || !Global)
- return DW_EH_PE_pcrel;
- else
- return DW_EH_PE_absptr;
}
-const char *
-X86DarwinTargetAsmInfo::getEHGlobalPrefix() const
-{
- const X86Subtarget* Subtarget = &TM.getSubtarget<X86Subtarget>();
- if (Subtarget->getDarwinVers() > 9)
- return PrivateGlobalPrefix;
- else
- return "";
-}
-
-X86ELFTargetAsmInfo::X86ELFTargetAsmInfo(const X86TargetMachine &TM):
- X86TargetAsmInfo<ELFTargetAsmInfo>(TM) {
+X86ELFTargetAsmInfo::X86ELFTargetAsmInfo(const X86TargetMachine &TM) :
+ X86TargetAsmInfo<TargetAsmInfo>(TM) {
- CStringSection = ".rodata.str";
PrivateGlobalPrefix = ".L";
WeakRefDirective = "\t.weak\t";
SetDirective = "\t.set\t";
// Debug Information
AbsoluteDebugSectionOffsets = true;
SupportsDebugInformation = 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";
- DwarfMacroInfoSection = "\t.section\t.debug_macinfo,\"\",@progbits";
// Exceptions handling
SupportsExceptionHandling = true;
AbsoluteEHSectionOffsets = false;
- DwarfEHFrameSection = "\t.section\t.eh_frame,\"aw\",@progbits";
- DwarfExceptionSection = "\t.section\t.gcc_except_table,\"a\",@progbits";
// On Linux we must declare when we can use a non-executable stack.
if (TM.getSubtarget<X86Subtarget>().isLinux())
NonexecutableStackDirective = "\t.section\t.note.GNU-stack,\"\",@progbits";
}
-unsigned
-X86ELFTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
- bool Global) const {
- CodeModel::Model CM = TM.getCodeModel();
- bool is64Bit = TM.getSubtarget<X86Subtarget>().is64Bit();
-
- if (TM.getRelocationModel() == Reloc::PIC_) {
- unsigned Format = 0;
-
- if (!is64Bit)
- // 32 bit targets always encode pointers as 4 bytes
- Format = DW_EH_PE_sdata4;
- else {
- // 64 bit targets encode pointers in 4 bytes iff:
- // - code model is small OR
- // - code model is medium and we're emitting externally visible symbols
- // or any code symbols
- if (CM == CodeModel::Small ||
- (CM == CodeModel::Medium && (Global ||
- Reason != DwarfEncoding::Data)))
- Format = DW_EH_PE_sdata4;
- else
- Format = DW_EH_PE_sdata8;
- }
-
- if (Global)
- Format |= DW_EH_PE_indirect;
-
- return (Format | DW_EH_PE_pcrel);
- } else {
- if (is64Bit &&
- (CM == CodeModel::Small ||
- (CM == CodeModel::Medium && Reason != DwarfEncoding::Data)))
- return DW_EH_PE_udata4;
- else
- return DW_EH_PE_absptr;
- }
-}
-
-X86COFFTargetAsmInfo::X86COFFTargetAsmInfo(const X86TargetMachine &TM):
- X86GenericTargetAsmInfo(TM) {
-
- GlobalPrefix = "_";
- LCOMMDirective = "\t.lcomm\t";
- COMMDirectiveTakesAlignment = false;
- HasDotTypeDotSizeDirective = false;
- HasSingleParameterDotFile = false;
- StaticCtorsSection = "\t.section .ctors,\"aw\"";
- StaticDtorsSection = "\t.section .dtors,\"aw\"";
- HiddenDirective = NULL;
- PrivateGlobalPrefix = "L"; // Prefix for private global symbols
- WeakRefDirective = "\t.weak\t";
- SetDirective = "\t.set\t";
-
- // Set up DWARF directives
- HasLEB128 = true; // Target asm supports leb128 directives (little-endian)
- AbsoluteDebugSectionOffsets = true;
- AbsoluteEHSectionOffsets = false;
- SupportsDebugInformation = true;
- DwarfSectionOffsetDirective = "\t.secrel32\t";
- DwarfAbbrevSection = "\t.section\t.debug_abbrev,\"dr\"";
- DwarfInfoSection = "\t.section\t.debug_info,\"dr\"";
- DwarfLineSection = "\t.section\t.debug_line,\"dr\"";
- DwarfFrameSection = "\t.section\t.debug_frame,\"dr\"";
- DwarfPubNamesSection ="\t.section\t.debug_pubnames,\"dr\"";
- DwarfPubTypesSection ="\t.section\t.debug_pubtypes,\"dr\"";
- DwarfStrSection = "\t.section\t.debug_str,\"dr\"";
- DwarfLocSection = "\t.section\t.debug_loc,\"dr\"";
- DwarfARangesSection = "\t.section\t.debug_aranges,\"dr\"";
- DwarfRangesSection = "\t.section\t.debug_ranges,\"dr\"";
- DwarfMacroInfoSection = "\t.section\t.debug_macinfo,\"dr\"";
-}
-
-unsigned
-X86COFFTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
- bool Global) const {
- CodeModel::Model CM = TM.getCodeModel();
- bool is64Bit = TM.getSubtarget<X86Subtarget>().is64Bit();
-
- if (TM.getRelocationModel() == Reloc::PIC_) {
- unsigned Format = 0;
-
- if (!is64Bit)
- // 32 bit targets always encode pointers as 4 bytes
- Format = DW_EH_PE_sdata4;
- else {
- // 64 bit targets encode pointers in 4 bytes iff:
- // - code model is small OR
- // - code model is medium and we're emitting externally visible symbols
- // or any code symbols
- if (CM == CodeModel::Small ||
- (CM == CodeModel::Medium && (Global ||
- Reason != DwarfEncoding::Data)))
- Format = DW_EH_PE_sdata4;
- else
- Format = DW_EH_PE_sdata8;
- }
-
- if (Global)
- Format |= DW_EH_PE_indirect;
-
- return (Format | DW_EH_PE_pcrel);
- } else {
- if (is64Bit &&
- (CM == CodeModel::Small ||
- (CM == CodeModel::Medium && Reason != DwarfEncoding::Data)))
- return DW_EH_PE_udata4;
- else
- return DW_EH_PE_absptr;
- }
-}
-
-std::string
-X86COFFTargetAsmInfo::UniqueSectionForGlobal(const GlobalValue* GV,
- SectionKind::Kind kind) const {
- switch (kind) {
- case SectionKind::Text:
- return ".text$linkonce" + GV->getName();
- case SectionKind::Data:
- case SectionKind::BSS:
- case SectionKind::ThreadData:
- case SectionKind::ThreadBSS:
- return ".data$linkonce" + GV->getName();
- case SectionKind::ROData:
- case SectionKind::RODataMergeConst:
- case SectionKind::RODataMergeStr:
- return ".rdata$linkonce" + GV->getName();
- default:
- LLVM_UNREACHABLE("Unknown section kind");
- }
- return NULL;
-}
-
-std::string X86COFFTargetAsmInfo::printSectionFlags(unsigned flags) const {
- std::string Flags = ",\"";
-
- if (flags & SectionFlags::Code)
- Flags += 'x';
- if (flags & SectionFlags::Writeable)
- Flags += 'w';
-
- Flags += "\"";
-
- return Flags;
-}
X86WinTargetAsmInfo::X86WinTargetAsmInfo(const X86TargetMachine &TM):
- X86GenericTargetAsmInfo(TM) {
+ X86TargetAsmInfo<TargetAsmInfo>(TM) {
GlobalPrefix = "_";
CommentString = ";";
AlignmentIsInBytes = true;
- TextSection = getUnnamedSection("_text", SectionFlags::Code);
- DataSection = getUnnamedSection("_data", SectionFlags::Writeable);
-
- JumpTableDataSection = NULL;
SwitchToSectionDirective = "";
TextSectionStartSuffix = "\tSEGMENT PARA 'CODE'";
DataSectionStartSuffix = "\tSEGMENT PARA 'DATA'";
- SectionEndDirectiveSuffix = "\tends\n";
-}
-
-template <class BaseTAI>
-bool X86TargetAsmInfo<BaseTAI>::LowerToBSwap(CallInst *CI) const {
- // FIXME: this should verify that we are targetting a 486 or better. If not,
- // we will turn this bswap into something that will be lowered to logical ops
- // instead of emitting the bswap asm. For now, we don't support 486 or lower
- // so don't worry about this.
-
- // Verify this is a simple bswap.
- if (CI->getNumOperands() != 2 ||
- CI->getType() != CI->getOperand(1)->getType() ||
- !CI->getType()->isInteger())
- return false;
-
- const IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
- if (!Ty || Ty->getBitWidth() % 16 != 0)
- return false;
-
- // Okay, we can do this xform, do so now.
- const Type *Tys[] = { Ty };
- Module *M = CI->getParent()->getParent()->getParent();
- Constant *Int = Intrinsic::getDeclaration(M, Intrinsic::bswap, Tys, 1);
-
- Value *Op = CI->getOperand(1);
- Op = CallInst::Create(Int, Op, CI->getName(), CI);
-
- CI->replaceAllUsesWith(Op);
- CI->eraseFromParent();
- return true;
-}
-
-template <class BaseTAI>
-bool X86TargetAsmInfo<BaseTAI>::ExpandInlineAsm(CallInst *CI) const {
- InlineAsm *IA = cast<InlineAsm>(CI->getCalledValue());
- std::vector<InlineAsm::ConstraintInfo> Constraints = IA->ParseConstraints();
-
- std::string AsmStr = IA->getAsmString();
-
- // TODO: should remove alternatives from the asmstring: "foo {a|b}" -> "foo a"
- std::vector<std::string> AsmPieces;
- SplitString(AsmStr, AsmPieces, "\n"); // ; as separator?
-
- switch (AsmPieces.size()) {
- default: return false;
- case 1:
- AsmStr = AsmPieces[0];
- AsmPieces.clear();
- SplitString(AsmStr, AsmPieces, " \t"); // Split with whitespace.
-
- // bswap $0
- if (AsmPieces.size() == 2 &&
- (AsmPieces[0] == "bswap" ||
- AsmPieces[0] == "bswapq" ||
- AsmPieces[0] == "bswapl") &&
- (AsmPieces[1] == "$0" ||
- AsmPieces[1] == "${0:q}")) {
- // No need to check constraints, nothing other than the equivalent of
- // "=r,0" would be valid here.
- return LowerToBSwap(CI);
- }
- // rorw $$8, ${0:w} --> llvm.bswap.i16
- if (CI->getType() == Type::Int16Ty &&
- AsmPieces.size() == 3 &&
- AsmPieces[0] == "rorw" &&
- AsmPieces[1] == "$$8," &&
- AsmPieces[2] == "${0:w}" &&
- IA->getConstraintString() == "=r,0,~{dirflag},~{fpsr},~{flags},~{cc}") {
- return LowerToBSwap(CI);
- }
- break;
- case 3:
- if (CI->getType() == Type::Int64Ty && Constraints.size() >= 2 &&
- Constraints[0].Codes.size() == 1 && Constraints[0].Codes[0] == "A" &&
- Constraints[1].Codes.size() == 1 && Constraints[1].Codes[0] == "0") {
- // bswap %eax / bswap %edx / xchgl %eax, %edx -> llvm.bswap.i64
- std::vector<std::string> Words;
- SplitString(AsmPieces[0], Words, " \t");
- if (Words.size() == 2 && Words[0] == "bswap" && Words[1] == "%eax") {
- Words.clear();
- SplitString(AsmPieces[1], Words, " \t");
- if (Words.size() == 2 && Words[0] == "bswap" && Words[1] == "%edx") {
- Words.clear();
- SplitString(AsmPieces[2], Words, " \t,");
- if (Words.size() == 3 && Words[0] == "xchgl" && Words[1] == "%eax" &&
- Words[2] == "%edx") {
- return LowerToBSwap(CI);
- }
- }
- }
- }
- break;
- }
- return false;
}
// Instantiate default implementation.
projects / oota-llvm.git / blobdiff