X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FTargetAsmInfo.cpp;h=6fa5420120f517ef042d85b63792079a7548b4f7;hb=fe167c5a145d00a35b980993a514f9056eeefed8;hp=5b7ddbfa4a7eaac929b0f80833f53e44d0bb4d67;hpb=e2cf37b88c089a71727b3ecd466856f0cd638813;p=oota-llvm.git

diff --git a/lib/Target/TargetAsmInfo.cpp b/lib/Target/TargetAsmInfo.cpp
index 5b7ddbfa4a7..6fa5420120f 100644
--- a/lib/Target/TargetAsmInfo.cpp
+++ b/lib/Target/TargetAsmInfo.cpp
@@ -1,4 +1,4 @@
-//===-- TargetAsmInfo.cpp - Asm Info ---------------------------------------==//
+//===-- llvm/Target/TargetAsmInfo.cpp - Target Assembly Info --------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -6,454 +6,22 @@
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
-//
-// This file defines target asm properties related what form asm statements
-// should take.
-//
-//===----------------------------------------------------------------------===//
 
-#include "llvm/Constants.h"
-#include "llvm/DerivedTypes.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/TargetData.h"
+#include "llvm/Target/TargetLowering.h"
+#include "llvm/Target/TargetLoweringObjectFile.h"
 #include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetOptions.h"
-#include "llvm/Support/Dwarf.h"
-#include "llvm/Support/ErrorHandling.h"
-#include <cctype>
-#include <cstring>
+#include "llvm/Target/TargetRegisterInfo.h"
 using namespace llvm;
 
-TargetAsmInfo::TargetAsmInfo(const TargetMachine &tm)
-: TM(tm) {
-  BSSSection = "\t.bss";
-  BSSSection_ = 0;
-  ReadOnlySection = 0;
-  SmallDataSection = 0;
-  SmallBSSSection = 0;
-  SmallRODataSection = 0;
-  TLSDataSection = 0;
-  TLSBSSSection = 0;
-  ZeroFillDirective = 0;
-  NonexecutableStackDirective = 0;
-  NeedsSet = false;
-  MaxInstLength = 4;
-  PCSymbol = "$";
-  SeparatorChar = ';';
-  CommentColumn = 60;
-  CommentString = "#";
-  FirstOperandColumn = 0;
-  MaxOperandLength = 0;
-  GlobalPrefix = "";
-  PrivateGlobalPrefix = ".";
-  LessPrivateGlobalPrefix = "";
-  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;
-  ConstantPoolSection = "\t.section .rodata";
-  JumpTableDataSection = "\t.section .rodata";
-  JumpTableDirective = 0;
-  CStringSection = 0;
-  CStringSection_ = 0;
-  // FIXME: Flags are ELFish - replace with normal section stuff.
-  StaticCtorsSection = "\t.section .ctors,\"aw\",@progbits";
-  StaticDtorsSection = "\t.section .dtors,\"aw\",@progbits";
-  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";
-  DwarfExceptionSection = ".gcc_except_table";
-  AsmTransCBE = 0;
-  TextSection = getUnnamedSection("\t.text", SectionFlags::Code);
-  DataSection = getUnnamedSection("\t.data", SectionFlags::Writeable);
-}
-
-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);
-}
-
-static bool isConstantString(const Constant *C) {
-  // First check: is we have constant array of i8 terminated with zero
-  const ConstantArray *CVA = dyn_cast<ConstantArray>(C);
-  // Check, if initializer is a null-terminated string
-  if (CVA && CVA->isCString())
-    return true;
-
-  // Another possibility: [1 x i8] zeroinitializer
-  if (isa<ConstantAggregateZero>(C)) {
-    if (const ArrayType *Ty = dyn_cast<ArrayType>(C->getType())) {
-      return (Ty->getElementType() == Type::Int8Ty &&
-              Ty->getNumElements() == 1);
-    }
-  }
-
-  return false;
-}
-
-unsigned TargetAsmInfo::RelocBehaviour() const {
-  // By default - all relocations in PIC mode would force symbol to be
-  // placed in r/w section.
-  return (TM.getRelocationModel() != Reloc::Static ?
-          Reloc::LocalOrGlobal : Reloc::None);
-}
-
-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(Reloc::LocalOrGlobal)) {
-      // Decide, whether it is still possible to put symbol into r/o section.
-      unsigned Reloc = RelocBehaviour();
-
-      // We already did a query for 'all' relocs, thus - early exits.
-      if (Reloc == Reloc::LocalOrGlobal)
-        return SectionKind::Data;
-      else if (Reloc == Reloc::None)
-        return SectionKind::ROData;
-      else {
-        // Ok, target wants something funny. Honour it.
-        return (C->ContainsRelocations(Reloc) ?
-                SectionKind::Data : SectionKind::ROData);
-      }
-    } else {
-      // Check, if initializer is a null-terminated string
-      if (isConstantString(C))
-        return SectionKind::RODataMergeStr;
-      else
-        return SectionKind::RODataMergeConst;
-    }
-  }
-
-  // Variable either is not constant or thread-local - output to 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::DataRel:
-     case SectionKind::DataRelLocal:
-     case SectionKind::DataRelRO:
-     case SectionKind::DataRelROLocal:
-     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:
-      llvm_unreachable("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;
-}
-
-const Section*
-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);
-  }
-
-  return S;
-}
-
-// 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::DataRel:
-    return ".gnu.linkonce.d.rel" + GV->getName();
-   case SectionKind::DataRelLocal:
-    return ".gnu.linkonce.d.rel.local" + GV->getName();
-   case SectionKind::DataRelRO:
-    return ".gnu.linkonce.d.rel.ro" + GV->getName();
-   case SectionKind::DataRelROLocal:
-    return ".gnu.linkonce.d.rel.ro.local" + 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:
-    llvm_unreachable("Unknown section kind");
-  }
-  return NULL;
-}
-
-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;
-  do {
-    Value >>= 7;
-    Size += sizeof(int8_t);
-  } while (Value);
-  return Size;
-}
-
-unsigned TargetAsmInfo::getSLEB128Size(int Value) {
-  unsigned Size = 0;
-  int Sign = Value >> (8 * sizeof(Value) - 1);
-  bool IsMore;
-
-  do {
-    unsigned Byte = Value & 0x7f;
-    Value >>= 7;
-    IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
-    Size += sizeof(int8_t);
-  } while (IsMore);
-  return Size;
+TargetAsmInfo::TargetAsmInfo(const TargetMachine &TM) {
+  TLOF = &TM.getTargetLowering()->getObjFileLowering();
+  const TargetData &TD = *TM.getTargetData();
+  IsLittleEndian = TD.isLittleEndian();
+  PointerSize = TD.getPointerSize();
+  const TargetFrameLowering &TFI = *TM.getFrameLowering();
+  StackDir = TFI.getStackGrowthDirection();
+  TRI = TM.getRegisterInfo();
+  TFI.getInitialFrameState(InitialFrameState);
 }