//
//===----------------------------------------------------------------------===//
-#include "llvm/Constants.h"
-#include "llvm/GlobalVariable.h"
-#include "llvm/Function.h"
-#include "llvm/Module.h"
-#include "llvm/Type.h"
#include "llvm/Target/TargetAsmInfo.h"
-#include "llvm/Target/TargetOptions.h"
-#include "llvm/Support/Dwarf.h"
#include <cctype>
#include <cstring>
-
using namespace llvm;
-TargetAsmInfo::TargetAsmInfo() :
- TextSection("\t.text"),
- TextSection_(0),
- DataSection("\t.data"),
- DataSection_(0),
- BSSSection("\t.bss"),
- BSSSection_(0),
- ReadOnlySection(0),
- ReadOnlySection_(0),
- SmallDataSection(0),
- SmallBSSSection(0),
- SmallRODataSection(0),
- TLSDataSection("\t.section .tdata,\"awT\",@progbits"),
- TLSDataSection_(0),
- TLSBSSSection("\t.section .tbss,\"awT\",@nobits"),
- TLSBSSSection_(0),
- ZeroFillDirective(0),
- NonexecutableStackDirective(0),
- NeedsSet(false),
- MaxInstLength(4),
- PCSymbol("$"),
- SeparatorChar(';'),
- CommentString("#"),
- GlobalPrefix(""),
- PrivateGlobalPrefix("."),
- LessPrivateGlobalPrefix(""),
- JumpTableSpecialLabelPrefix(0),
- GlobalVarAddrPrefix(""),
- GlobalVarAddrSuffix(""),
- FunctionAddrPrefix(""),
- FunctionAddrSuffix(""),
- PersonalityPrefix(""),
- PersonalitySuffix(""),
- NeedsIndirectEncoding(false),
- InlineAsmStart("#APP"),
- InlineAsmEnd("#NO_APP"),
- AssemblerDialect(0),
- StringConstantPrefix(".str"),
- ZeroDirective("\t.zero\t"),
- ZeroDirectiveSuffix(0),
- AsciiDirective("\t.ascii\t"),
- AscizDirective("\t.asciz\t"),
- Data8bitsDirective("\t.byte\t"),
- Data16bitsDirective("\t.short\t"),
- Data32bitsDirective("\t.long\t"),
- Data64bitsDirective("\t.quad\t"),
- AlignDirective("\t.align\t"),
- AlignmentIsInBytes(true),
- TextAlignFillValue(0),
- SwitchToSectionDirective("\t.section\t"),
- TextSectionStartSuffix(""),
- DataSectionStartSuffix(""),
- SectionEndDirectiveSuffix(0),
- ConstantPoolSection("\t.section .rodata"),
- JumpTableDataSection("\t.section .rodata"),
- JumpTableDirective(0),
- CStringSection(0),
- CStringSection_(0),
- StaticCtorsSection("\t.section .ctors,\"aw\",@progbits"),
- StaticDtorsSection("\t.section .dtors,\"aw\",@progbits"),
- FourByteConstantSection(0),
- FourByteConstantSection_(0),
- EightByteConstantSection(0),
- EightByteConstantSection_(0),
- SixteenByteConstantSection(0),
- SixteenByteConstantSection_(0),
- GlobalDirective("\t.globl\t"),
- SetDirective(0),
- LCOMMDirective(0),
- COMMDirective("\t.comm\t"),
- COMMDirectiveTakesAlignment(true),
- HasDotTypeDotSizeDirective(true),
- UsedDirective(0),
- WeakRefDirective(0),
- WeakDefDirective(0),
- HiddenDirective("\t.hidden\t"),
- ProtectedDirective("\t.protected\t"),
- AbsoluteDebugSectionOffsets(false),
- AbsoluteEHSectionOffsets(false),
- HasLEB128(false),
- HasDotLocAndDotFile(false),
- SupportsDebugInformation(false),
- SupportsExceptionHandling(false),
- DwarfRequiresFrameSection(true),
- GlobalEHDirective(0),
- SupportsWeakOmittedEHFrame(true),
- DwarfSectionOffsetDirective(0),
- DwarfAbbrevSection(".debug_abbrev"),
- DwarfInfoSection(".debug_info"),
- DwarfLineSection(".debug_line"),
- DwarfFrameSection(".debug_frame"),
- DwarfPubNamesSection(".debug_pubnames"),
- DwarfPubTypesSection(".debug_pubtypes"),
- DwarfStrSection(".debug_str"),
- DwarfLocSection(".debug_loc"),
- DwarfARangesSection(".debug_aranges"),
- DwarfRangesSection(".debug_ranges"),
- DwarfMacInfoSection(".debug_macinfo"),
- DwarfEHFrameSection(".eh_frame"),
- DwarfExceptionSection(".gcc_except_table"),
- AsmTransCBE(0) {
- TextSection_ = getUnnamedSection(TextSection);
- DataSection_ = getUnnamedSection(DataSection);
+TargetAsmInfo::TargetAsmInfo() {
+ ZeroFillDirective = 0;
+ NonexecutableStackDirective = 0;
+ NeedsSet = false;
+ MaxInstLength = 4;
+ PCSymbol = "$";
+ SeparatorChar = ';';
+ CommentColumn = 60;
+ CommentString = "#";
+ FirstOperandColumn = 0;
+ MaxOperandLength = 0;
+ GlobalPrefix = "";
+ PrivateGlobalPrefix = ".";
+ LinkerPrivateGlobalPrefix = "";
+ JumpTableSpecialLabelPrefix = 0;
+ GlobalVarAddrPrefix = "";
+ GlobalVarAddrSuffix = "";
+ FunctionAddrPrefix = "";
+ FunctionAddrSuffix = "";
+ PersonalityPrefix = "";
+ PersonalitySuffix = "";
+ NeedsIndirectEncoding = false;
+ InlineAsmStart = "#APP";
+ InlineAsmEnd = "#NO_APP";
+ AssemblerDialect = 0;
+ AllowQuotesInName = false;
+ ZeroDirective = "\t.zero\t";
+ ZeroDirectiveSuffix = 0;
+ AsciiDirective = "\t.ascii\t";
+ AscizDirective = "\t.asciz\t";
+ Data8bitsDirective = "\t.byte\t";
+ Data16bitsDirective = "\t.short\t";
+ Data32bitsDirective = "\t.long\t";
+ Data64bitsDirective = "\t.quad\t";
+ AlignDirective = "\t.align\t";
+ AlignmentIsInBytes = true;
+ TextAlignFillValue = 0;
+ SwitchToSectionDirective = "\t.section\t";
+ TextSectionStartSuffix = "";
+ DataSectionStartSuffix = "";
+ SectionEndDirectiveSuffix = 0;
+ JumpTableDirective = 0;
+ GlobalDirective = "\t.globl\t";
+ SetDirective = 0;
+ LCOMMDirective = 0;
+ COMMDirective = "\t.comm\t";
+ COMMDirectiveTakesAlignment = true;
+ HasDotTypeDotSizeDirective = true;
+ HasSingleParameterDotFile = true;
+ UsedDirective = 0;
+ WeakRefDirective = 0;
+ WeakDefDirective = 0;
+ // FIXME: These are ELFish - move to ELFTAI.
+ HiddenDirective = "\t.hidden\t";
+ ProtectedDirective = "\t.protected\t";
+ AbsoluteDebugSectionOffsets = false;
+ AbsoluteEHSectionOffsets = false;
+ HasLEB128 = false;
+ HasDotLocAndDotFile = false;
+ SupportsDebugInformation = false;
+ SupportsExceptionHandling = false;
+ DwarfRequiresFrameSection = true;
+ DwarfUsesInlineInfoSection = false;
+ Is_EHSymbolPrivate = true;
+ GlobalEHDirective = 0;
+ SupportsWeakOmittedEHFrame = true;
+ DwarfSectionOffsetDirective = 0;
+ DwarfAbbrevSection = ".debug_abbrev";
+ DwarfInfoSection = ".debug_info";
+ DwarfLineSection = ".debug_line";
+ DwarfFrameSection = ".debug_frame";
+ DwarfPubNamesSection = ".debug_pubnames";
+ DwarfPubTypesSection = ".debug_pubtypes";
+ DwarfDebugInlineSection = ".debug_inlined";
+ DwarfStrSection = ".debug_str";
+ DwarfLocSection = ".debug_loc";
+ DwarfARangesSection = ".debug_aranges";
+ DwarfRangesSection = ".debug_ranges";
+ DwarfMacroInfoSection = ".debug_macinfo";
+ DwarfEHFrameSection = ".eh_frame";
+ AsmTransCBE = 0;
}
TargetAsmInfo::~TargetAsmInfo() {
}
-/// Measure the specified inline asm to determine an approximation of its
-/// length.
-/// Comments (which run till the next SeparatorChar or newline) do not
-/// count as an instruction.
-/// Any other non-whitespace text is considered an instruction, with
-/// multiple instructions separated by SeparatorChar or newlines.
-/// Variable-length instructions are not handled here; this function
-/// may be overloaded in the target code to do that.
-unsigned TargetAsmInfo::getInlineAsmLength(const char *Str) const {
- // Count the number of instructions in the asm.
- bool atInsnStart = true;
- unsigned Length = 0;
- for (; *Str; ++Str) {
- if (*Str == '\n' || *Str == SeparatorChar)
- atInsnStart = true;
- if (atInsnStart && !isspace(*Str)) {
- Length += MaxInstLength;
- atInsnStart = false;
- }
- if (atInsnStart && strncmp(Str, CommentString, strlen(CommentString))==0)
- atInsnStart = false;
- }
-
- return Length;
-}
-
-unsigned TargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
- bool Global) const {
- return dwarf::DW_EH_PE_absptr;
-}
-
-static bool isSuitableForBSS(const GlobalVariable *GV) {
- if (!GV->hasInitializer())
- return true;
-
- // Leave constant zeros in readonly constant sections, so they can be shared
- Constant *C = GV->getInitializer();
- return (C->isNullValue() && !GV->isConstant() && !NoZerosInBSS);
-}
-
-SectionKind::Kind
-TargetAsmInfo::SectionKindForGlobal(const GlobalValue *GV) const {
- // Early exit - functions should be always in text sections.
- if (isa<Function>(GV))
- return SectionKind::Text;
-
- const GlobalVariable* GVar = dyn_cast<GlobalVariable>(GV);
- bool isThreadLocal = GVar->isThreadLocal();
- assert(GVar && "Invalid global value for section selection");
-
- if (isSuitableForBSS(GVar)) {
- // Variable can be easily put to BSS section.
- return (isThreadLocal ? SectionKind::ThreadBSS : SectionKind::BSS);
- } else if (GVar->isConstant() && !isThreadLocal) {
- // Now we know, that varible has initializer and it is constant. We need to
- // check its initializer to decide, which section to output it into. Also
- // note, there is no thread-local r/o section.
- Constant *C = GVar->getInitializer();
- if (C->ContainsRelocations())
- return SectionKind::ROData;
- else {
- const ConstantArray *CVA = dyn_cast<ConstantArray>(C);
- // Check, if initializer is a null-terminated string
- if (CVA && CVA->isCString())
- return SectionKind::RODataMergeStr;
- else
- return SectionKind::RODataMergeConst;
- }
- }
-
- // Variable is not constant or thread-local - emit to generic data section.
- return (isThreadLocal ? SectionKind::ThreadData : SectionKind::Data);
-}
-
-unsigned
-TargetAsmInfo::SectionFlagsForGlobal(const GlobalValue *GV,
- const char* Name) const {
- unsigned Flags = SectionFlags::None;
-
- // Decode flags from global itself.
- if (GV) {
- SectionKind::Kind Kind = SectionKindForGlobal(GV);
- switch (Kind) {
- case SectionKind::Text:
- Flags |= SectionFlags::Code;
- break;
- case SectionKind::ThreadData:
- case SectionKind::ThreadBSS:
- Flags |= SectionFlags::TLS;
- // FALLS THROUGH
- case SectionKind::Data:
- case SectionKind::BSS:
- Flags |= SectionFlags::Writeable;
- break;
- case SectionKind::ROData:
- case SectionKind::RODataMergeStr:
- case SectionKind::RODataMergeConst:
- // No additional flags here
- break;
- case SectionKind::SmallData:
- case SectionKind::SmallBSS:
- Flags |= SectionFlags::Writeable;
- // FALLS THROUGH
- case SectionKind::SmallROData:
- Flags |= SectionFlags::Small;
- break;
- default:
- assert(0 && "Unexpected section kind!");
- }
-
- if (GV->isWeakForLinker())
- Flags |= SectionFlags::Linkonce;
- }
-
- // Add flags from sections, if any.
- if (Name && *Name) {
- Flags |= SectionFlags::Named;
-
- // Some lame default implementation based on some magic section names.
- if (strncmp(Name, ".gnu.linkonce.b.", 16) == 0 ||
- strncmp(Name, ".llvm.linkonce.b.", 17) == 0 ||
- strncmp(Name, ".gnu.linkonce.sb.", 17) == 0 ||
- strncmp(Name, ".llvm.linkonce.sb.", 18) == 0)
- Flags |= SectionFlags::BSS;
- else if (strcmp(Name, ".tdata") == 0 ||
- strncmp(Name, ".tdata.", 7) == 0 ||
- strncmp(Name, ".gnu.linkonce.td.", 17) == 0 ||
- strncmp(Name, ".llvm.linkonce.td.", 18) == 0)
- Flags |= SectionFlags::TLS;
- else if (strcmp(Name, ".tbss") == 0 ||
- strncmp(Name, ".tbss.", 6) == 0 ||
- strncmp(Name, ".gnu.linkonce.tb.", 17) == 0 ||
- strncmp(Name, ".llvm.linkonce.tb.", 18) == 0)
- Flags |= SectionFlags::BSS | SectionFlags::TLS;
- }
-
- return Flags;
-}
-
-std::string
-TargetAsmInfo::SectionForGlobal(const GlobalValue *GV) const {
- const Section* S;
- // Select section name
- if (GV->hasSection()) {
- // Honour section already set, if any
- unsigned Flags = SectionFlagsForGlobal(GV,
- GV->getSection().c_str());
- S = getNamedSection(GV->getSection().c_str(), Flags);
- } else {
- // Use default section depending on the 'type' of global
- S = SelectSectionForGlobal(GV);
- }
-
- if (!S->isNamed())
- return S->Name;
-
- // If section is named we need to switch into it via special '.section'
- // directive and also append funky flags. Otherwise - section name is just
- // some magic assembler directive.
- return getSwitchToSectionDirective() + S->Name + getSectionFlags(S->Flags);
-}
-
-// Lame default implementation. Calculate the section name for global.
-const Section*
-TargetAsmInfo::SelectSectionForGlobal(const GlobalValue *GV) const {
- SectionKind::Kind Kind = SectionKindForGlobal(GV);
-
- if (GV->isWeakForLinker()) {
- std::string Name = UniqueSectionForGlobal(GV, Kind);
- unsigned Flags = SectionFlagsForGlobal(GV, Name.c_str());
- return getNamedSection(Name.c_str(), Flags);
- } else {
- if (Kind == SectionKind::Text)
- return getTextSection_();
- else if (isBSS(Kind) && getBSSSection_())
- return getBSSSection_();
- else if (getReadOnlySection_() && SectionKind::isReadOnly(Kind))
- return getReadOnlySection_();
- }
-
- return getDataSection_();
-}
-
-// Lame default implementation. Calculate the section name for machine const.
-const Section*
-TargetAsmInfo::SelectSectionForMachineConst(const Type *Ty) const {
- // FIXME: Support data.rel stuff someday
- return getDataSection_();
-}
-
-std::string
-TargetAsmInfo::UniqueSectionForGlobal(const GlobalValue* GV,
- SectionKind::Kind Kind) const {
- switch (Kind) {
- case SectionKind::Text:
- return ".gnu.linkonce.t." + GV->getName();
- case SectionKind::Data:
- return ".gnu.linkonce.d." + GV->getName();
- case SectionKind::SmallData:
- return ".gnu.linkonce.s." + GV->getName();
- case SectionKind::BSS:
- return ".gnu.linkonce.b." + GV->getName();
- case SectionKind::SmallBSS:
- return ".gnu.linkonce.sb." + GV->getName();
- case SectionKind::ROData:
- case SectionKind::RODataMergeConst:
- case SectionKind::RODataMergeStr:
- return ".gnu.linkonce.r." + GV->getName();
- case SectionKind::SmallROData:
- return ".gnu.linkonce.s2." + GV->getName();
- case SectionKind::ThreadData:
- return ".gnu.linkonce.td." + GV->getName();
- case SectionKind::ThreadBSS:
- return ".gnu.linkonce.tb." + GV->getName();
- default:
- assert(0 && "Unknown section kind");
- }
-}
-
-const Section*
-TargetAsmInfo::getNamedSection(const char *Name, unsigned Flags,
- bool Override) const {
- Section& S = Sections[Name];
-
- // This is newly-created section, set it up properly.
- if (S.Flags == SectionFlags::Invalid || Override) {
- S.Flags = Flags | SectionFlags::Named;
- S.Name = Name;
- }
-
- return &S;
-}
-
-const Section*
-TargetAsmInfo::getUnnamedSection(const char *Directive, unsigned Flags,
- bool Override) const {
- Section& S = Sections[Directive];
-
- // This is newly-created section, set it up properly.
- if (S.Flags == SectionFlags::Invalid || Override) {
- S.Flags = Flags & ~SectionFlags::Named;
- S.Name = Directive;
- }
-
- return &S;
-}
-
-const std::string&
-TargetAsmInfo::getSectionFlags(unsigned Flags) const {
- SectionFlags::FlagsStringsMapType::iterator I = FlagsStrings.find(Flags);
-
- // We didn't print these flags yet, print and save them to map. This reduces
- // amount of heap trashing due to std::string construction / concatenation.
- if (I == FlagsStrings.end())
- I = FlagsStrings.insert(std::make_pair(Flags,
- printSectionFlags(Flags))).first;
-
- return I->second;
-}
unsigned TargetAsmInfo::getULEB128Size(unsigned Value) {
unsigned Size = 0;
projects / oota-llvm.git / blobdiff