using namespace llvm;
using namespace llvm::dwarf;
-static const char *const x86_asm_table[] = {
- "{si}", "S",
- "{di}", "D",
- "{ax}", "a",
- "{cx}", "c",
- "{memory}", "memory",
- "{flags}", "",
- "{dirflag}", "",
- "{fpsr}", "",
- "{cc}", "cc",
- 0,0};
-
-X86TargetAsmInfo::X86TargetAsmInfo(const X86TargetMachine &TM) {
- const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
- X86TM = &TM;
-
- AsmTransCBE = x86_asm_table;
-
- AssemblerDialect = Subtarget->getAsmFlavor();
-}
-
-bool X86TargetAsmInfo::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;
-}
-
-
-bool X86TargetAsmInfo::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[1] == "$0") {
- // No need to check constraints, nothing other than the equivalent of
- // "=r,0" would be valid here.
- 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;
-}
+const char *const llvm::x86_asm_table[] = {
+ "{si}", "S",
+ "{di}", "D",
+ "{ax}", "a",
+ "{cx}", "c",
+ "{memory}", "memory",
+ "{flags}", "",
+ "{dirflag}", "",
+ "{fpsr}", "",
+ "{cc}", "cc",
+ 0,0};
X86DarwinTargetAsmInfo::X86DarwinTargetAsmInfo(const X86TargetMachine &TM):
- X86TargetAsmInfo(TM) {
- bool is64Bit = X86TM->getSubtarget<X86Subtarget>().is64Bit();
+ X86TargetAsmInfo<DarwinTargetAsmInfo>(TM) {
+ const X86Subtarget* Subtarget = &DTM->getSubtarget<X86Subtarget>();
+ bool is64Bit = Subtarget->is64Bit();
AlignmentIsInBytes = false;
TextAlignFillValue = 0x90;
Data64bitsDirective = 0; // we can't emit a 64-bit unit
ZeroDirective = "\t.space\t"; // ".space N" emits N zeros.
PrivateGlobalPrefix = "L"; // Marker for constant pool idxs
+ LessPrivateGlobalPrefix = "l"; // Marker for some ObjC metadata
BSSSection = 0; // no BSS section.
ZeroFillDirective = "\t.zerofill\t"; // Uses .zerofill
- ConstantPoolSection = "\t.const\n";
+ if (DTM->getRelocationModel() != Reloc::Static)
+ ConstantPoolSection = "\t.const_data";
+ else
+ ConstantPoolSection = "\t.const\n";
JumpTableDataSection = "\t.const\n";
CStringSection = "\t.cstring";
- FourByteConstantSection = "\t.literal4\n";
- EightByteConstantSection = "\t.literal8\n";
// FIXME: Why don't always use this section?
- if (is64Bit)
- SixteenByteConstantSection = "\t.literal16\n";
- ReadOnlySection = "\t.const\n";
+ if (is64Bit) {
+ SixteenByteConstantSection = getUnnamedSection("\t.literal16\n",
+ SectionFlags::Mergeable);
+ }
LCOMMDirective = "\t.lcomm\t";
SwitchToSectionDirective = "\t.section ";
StringConstantPrefix = "\1LC";
- COMMDirectiveTakesAlignment = false;
+ // Leopard and above support aligned common symbols.
+ COMMDirectiveTakesAlignment = (Subtarget->getDarwinVers() >= 9);
HasDotTypeDotSizeDirective = false;
if (TM.getRelocationModel() == Reloc::Static) {
StaticCtorsSection = ".constructor";
}
X86ELFTargetAsmInfo::X86ELFTargetAsmInfo(const X86TargetMachine &TM):
- X86TargetAsmInfo(TM) {
- bool is64Bit = X86TM->getSubtarget<X86Subtarget>().is64Bit();
+ X86TargetAsmInfo<ELFTargetAsmInfo>(TM) {
- ReadOnlySection = "\t.section\t.rodata";
- FourByteConstantSection = "\t.section\t.rodata.cst4,\"aM\",@progbits,4";
- EightByteConstantSection = "\t.section\t.rodata.cst8,\"aM\",@progbits,8";
- SixteenByteConstantSection = "\t.section\t.rodata.cst16,\"aM\",@progbits,16";
- CStringSection = "\t.section\t.rodata.str1.1,\"aMS\",@progbits,1";
+ CStringSection = ".rodata.str";
PrivateGlobalPrefix = ".L";
WeakRefDirective = "\t.weak\t";
SetDirective = "\t.set\t";
DwarfMacInfoSection = "\t.section\t.debug_macinfo,\"\",@progbits";
// Exceptions handling
- if (!is64Bit)
- SupportsExceptionHandling = true;
+ 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 (X86TM->getSubtarget<X86Subtarget>().isLinux())
+ if (ETM->getSubtarget<X86Subtarget>().isLinux())
NonexecutableStackDirective = "\t.section\t.note.GNU-stack,\"\",@progbits";
}
unsigned
X86ELFTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
bool Global) const {
- CodeModel::Model CM = X86TM->getCodeModel();
- bool is64Bit = X86TM->getSubtarget<X86Subtarget>().is64Bit();
+ CodeModel::Model CM = ETM->getCodeModel();
+ bool is64Bit = ETM->getSubtarget<X86Subtarget>().is64Bit();
- if (X86TM->getRelocationModel() == Reloc::PIC_) {
+ if (ETM->getRelocationModel() == Reloc::PIC_) {
unsigned Format = 0;
if (!is64Bit)
}
X86COFFTargetAsmInfo::X86COFFTargetAsmInfo(const X86TargetMachine &TM):
- X86TargetAsmInfo(TM) {
+ X86GenericTargetAsmInfo(TM) {
+ X86TM = &TM;
+
GlobalPrefix = "_";
LCOMMDirective = "\t.lcomm\t";
COMMDirectiveTakesAlignment = false;
DwarfMacInfoSection = "\t.section\t.debug_macinfo,\"dr\"";
}
-X86WinTargetAsmInfo::X86WinTargetAsmInfo(const X86TargetMachine &TM):
- X86TargetAsmInfo(TM) {
- GlobalPrefix = "_";
- CommentString = ";";
-
- PrivateGlobalPrefix = "$";
- AlignDirective = "\talign\t";
- ZeroDirective = "\tdb\t";
- ZeroDirectiveSuffix = " dup(0)";
- AsciiDirective = "\tdb\t";
- AscizDirective = 0;
- Data8bitsDirective = "\tdb\t";
- Data16bitsDirective = "\tdw\t";
- Data32bitsDirective = "\tdd\t";
- Data64bitsDirective = "\tdq\t";
- HasDotTypeDotSizeDirective = false;
-
- TextSection = "_text";
- DataSection = "_data";
- JumpTableDataSection = NULL;
- SwitchToSectionDirective = "";
- TextSectionStartSuffix = "\tsegment 'CODE'";
- DataSectionStartSuffix = "\tsegment 'DATA'";
- SectionEndDirectiveSuffix = "\tends\n";
-}
-
unsigned
X86COFFTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
bool Global) const {
}
}
-std::string X86TargetAsmInfo::UniqueSectionForGlobal(const GlobalValue* GV,
- SectionKind::Kind kind) const {
- const X86Subtarget *Subtarget = &X86TM->getSubtarget<X86Subtarget>();
-
- switch (Subtarget->TargetType) {
- case X86Subtarget::isDarwin:
- if (kind == SectionKind::Text)
- return "__TEXT,__textcoal_nt,coalesced,pure_instructions";
- else
- return "__DATA,__datacoal_nt,coalesced";
- case X86Subtarget::isCygwin:
- case X86Subtarget::isMingw:
- 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$linkonce" + GV->getName();
- default:
- assert(0 && "Unknown section kind");
- }
- case X86Subtarget::isELF:
- return TargetAsmInfo::UniqueSectionForGlobal(GV, kind);
+std::string
+X86COFFTargetAsmInfo::UniqueSectionForGlobal(const GlobalValue* GV,
+ SectionKind::Kind kind) const {
+ switch (kind) {
+ case SectionKind::Text:
+ return ".text$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:
- return "";
+ assert(0 && "Unknown section kind");
}
}
+std::string X86COFFTargetAsmInfo::printSectionFlags(unsigned flags) const {
+ std::string Flags = ",\"";
-std::string X86TargetAsmInfo::SectionForGlobal(const GlobalValue *GV) const {
- SectionKind::Kind kind = SectionKindForGlobal(GV);
- unsigned flags = SectionFlagsForGlobal(GV, GV->getSection().c_str());
- std::string Name;
+ if (flags & SectionFlags::Code)
+ Flags += 'x';
+ if (flags & SectionFlags::Writeable)
+ Flags += 'w';
- // FIXME: Should we use some hashing based on section name and just check
- // flags?
- // FIXME: It seems, that Darwin uses much more sections.
+ Flags += "\"";
- // Select section name
- if (GV->hasSection()) {
- // Honour section already set, if any
- Name = GV->getSection();
- } else {
- // Use default section depending on the 'type' of global
- if (const Function *F = dyn_cast<Function>(GV)) {
- switch (F->getLinkage()) {
- default: assert(0 && "Unknown linkage type!");
- case Function::InternalLinkage:
- case Function::DLLExportLinkage:
- case Function::ExternalLinkage:
- Name = TextSection;
- break;
- case Function::WeakLinkage:
- case Function::LinkOnceLinkage:
- Name = UniqueSectionForGlobal(F, kind);
- break;
- }
- } else if (const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV)) {
- if (GVar->hasCommonLinkage() ||
- GVar->hasLinkOnceLinkage() ||
- GVar->hasWeakLinkage())
- Name = UniqueSectionForGlobal(GVar, kind);
- else {
- switch (kind) {
- case SectionKind::Data:
- Name = DataSection;
- break;
- case SectionKind::BSS:
- Name = (BSSSection ? BSSSection : DataSection);
- break;
- case SectionKind::ROData:
- case SectionKind::RODataMergeStr:
- case SectionKind::RODataMergeConst:
- // FIXME: Temporary
- Name = DataSection;
- break;
- case SectionKind::ThreadData:
- Name = (TLSDataSection ? TLSDataSection : DataSection);
- break;
- case SectionKind::ThreadBSS:
- Name = (TLSBSSSection ? TLSBSSSection : DataSection);
- default:
- assert(0 && "Unsuported section kind for global");
- }
- }
- } else
- assert(0 && "Unsupported global");
- }
+ return Flags;
+}
+
+X86WinTargetAsmInfo::X86WinTargetAsmInfo(const X86TargetMachine &TM):
+ X86GenericTargetAsmInfo(TM) {
+ GlobalPrefix = "_";
+ CommentString = ";";
+
+ PrivateGlobalPrefix = "$";
+ AlignDirective = "\talign\t";
+ ZeroDirective = "\tdb\t";
+ ZeroDirectiveSuffix = " dup(0)";
+ AsciiDirective = "\tdb\t";
+ AscizDirective = 0;
+ Data8bitsDirective = "\tdb\t";
+ Data16bitsDirective = "\tdw\t";
+ Data32bitsDirective = "\tdd\t";
+ Data64bitsDirective = "\tdq\t";
+ HasDotTypeDotSizeDirective = false;
- Name += PrintSectionFlags(flags);
- return Name;
+ TextSection = getUnnamedSection("_text", SectionFlags::Code);
+ DataSection = getUnnamedSection("_data", SectionFlags::Writeable);
+
+ JumpTableDataSection = NULL;
+ SwitchToSectionDirective = "";
+ TextSectionStartSuffix = "\tsegment 'CODE'";
+ DataSectionStartSuffix = "\tsegment 'DATA'";
+ SectionEndDirectiveSuffix = "\tends\n";
}
-std::string X86TargetAsmInfo::PrintSectionFlags(unsigned flags) const {
- const X86Subtarget *Subtarget = &X86TM->getSubtarget<X86Subtarget>();
-
- std::string Flags = "";
-
- // Add all special flags, etc
- switch (Subtarget->TargetType) {
- case X86Subtarget::isELF:
- 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';
-
- Flags += "\"";
-
- // FIXME: There can be exceptions here
- if (flags & SectionFlags::BSS)
- Flags += ",@nobits";
- else
- Flags += ",@progbits";
+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.
- // FIXME: entity size for mergeable sections
- break;
- case X86Subtarget::isCygwin:
- case X86Subtarget::isMingw:
- Flags += ",\"";
+ // 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();
- if (flags & SectionFlags::Code)
- Flags += 'x';
- if (flags & SectionFlags::Writeable)
- Flags += 'w';
+ // TODO: should remove alternatives from the asmstring: "foo {a|b}" -> "foo a"
+ std::vector<std::string> AsmPieces;
+ SplitString(AsmStr, AsmPieces, "\n"); // ; as separator?
- Flags += "\"";
+ 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[1] == "$0") {
+ // No need to check constraints, nothing other than the equivalent of
+ // "=r,0" would be valid here.
+ return LowerToBSwap(CI);
+ }
break;
- case X86Subtarget::isDarwin:
- // Darwin does not use any special flags
- default:
+ 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 Flags;
+ return false;
}
+
+// Instantiate default implementation.
+TEMPLATE_INSTANTIATION(class X86TargetAsmInfo<TargetAsmInfo>);
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