[mips][ias] Support .dtprel[d]word and .tprel[d]word directives

[atanasyan]

Summary

Assembler directives .dtprelword, .dtpreldword, .tprelword, and .tpreldword generates relocations R_MIPS_TLS_DTPREL32, R_MIPS_TLS_DTPREL64, R_MIPS_TLS_TPREL32, and R_MIPS_TLS_TPREL64 respectively.

The main motivation for this patch is to be able to write test cases for checking correctness of the LLD linker's behaviour.

[sdardis]

LGTM with obvious comment fix.

lib/MC/MCObjectStreamer.cpp

498

While you're here can you correct this comment? It should be:

Associate GPRel64 fixup with data and resize data area

include/llvm/MC/MCAsmInfo.h

protected:
   /// to NULL.
   const char *GPRel64Directive;
 
   /// If non-null, a directive that is used to emit a word which should be
   /// relocated as a 32-bit GP-relative offset, e.g. .gpword on Mips or .gprel32
   /// on Alpha.  Defaults to NULL.
   const char *GPRel32Directive;
 
+  /// If non-null, directives that are used to emit a word/dword which should
+  /// be relocated as a 32/64-bit DTP/TP-relative offset, e.g. .dtprelword/
+  /// .dtpreldword/.tprelword/.tpreldword on Mips.
+  const char *DTPRel32Directive = nullptr;
+  const char *DTPRel64Directive = nullptr;
+  const char *TPRel32Directive = nullptr;
+  const char *TPRel64Directive = nullptr;
+
   /// This is true if this target uses "Sun Style" syntax for section switching
   /// ("#alloc,#write" etc) instead of the normal ELF syntax (,"a,w") in
   /// .section directives.  Defaults to false.
   bool SunStyleELFSectionSwitchSyntax;
 
   /// This is true if this target uses ELF '.section' directive before the
   /// '.bss' one. It's used for PPC/Linux which doesn't support the '.bss'
   /// directive only.  Defaults to false.
public:
   // Data directive accessors.
 
   const char *getData8bitsDirective() const { return Data8bitsDirective; }
   const char *getData16bitsDirective() const { return Data16bitsDirective; }
   const char *getData32bitsDirective() const { return Data32bitsDirective; }
   const char *getData64bitsDirective() const { return Data64bitsDirective; }
   const char *getGPRel64Directive() const { return GPRel64Directive; }
   const char *getGPRel32Directive() const { return GPRel32Directive; }
+  const char *getDTPRel64Directive() const { return DTPRel64Directive; }
+  const char *getDTPRel32Directive() const { return DTPRel32Directive; }
+  const char *getTPRel64Directive() const { return TPRel64Directive; }
+  const char *getTPRel32Directive() const { return TPRel32Directive; }
 
   /// Targets can implement this method to specify a section to switch to if the
   /// translation unit doesn't have any trampolines that require an executable
   /// stack.
   virtual MCSection *getNonexecutableStackSection(MCContext &Ctx) const {
     return nullptr;
   }
 

include/llvm/MC/MCFixup.h

enum MCFixupKind {
   FK_PCRel_1,    ///< A one-byte pc relative fixup.
   FK_PCRel_2,    ///< A two-byte pc relative fixup.
   FK_PCRel_4,    ///< A four-byte pc relative fixup.
   FK_PCRel_8,    ///< A eight-byte pc relative fixup.
   FK_GPRel_1,    ///< A one-byte gp relative fixup.
   FK_GPRel_2,    ///< A two-byte gp relative fixup.
   FK_GPRel_4,    ///< A four-byte gp relative fixup.
   FK_GPRel_8,    ///< A eight-byte gp relative fixup.
+  FK_DTPRel_4,   ///< A four-byte dtp relative fixup.
+  FK_DTPRel_8,   ///< A eight-byte dtp relative fixup.
+  FK_TPRel_4,    ///< A four-byte tp relative fixup.
+  FK_TPRel_8,    ///< A eight-byte tp relative fixup.
   FK_SecRel_1,   ///< A one-byte section relative fixup.
   FK_SecRel_2,   ///< A two-byte section relative fixup.
   FK_SecRel_4,   ///< A four-byte section relative fixup.
   FK_SecRel_8,   ///< A eight-byte section relative fixup.
 
   FirstTargetFixupKind = 128,
 
   // Limit range of target fixups, in case we want to pack more efficiently

include/llvm/MC/MCObjectStreamer.h

void EmitCVInlineLinetableDirective(
       unsigned PrimaryFunctionId, unsigned SourceFileId, unsigned SourceLineNum,
       const MCSymbol *FnStartSym, const MCSymbol *FnEndSym,
       ArrayRef<unsigned> SecondaryFunctionIds) override;
   void EmitCVDefRangeDirective(
       ArrayRef<std::pair<const MCSymbol *, const MCSymbol *>> Ranges,
       StringRef FixedSizePortion) override;
   void EmitCVStringTableDirective() override;
   void EmitCVFileChecksumsDirective() override;
+  void EmitDTPRel32Value(const MCExpr *Value) override;
+  void EmitDTPRel64Value(const MCExpr *Value) override;
+  void EmitTPRel32Value(const MCExpr *Value) override;
+  void EmitTPRel64Value(const MCExpr *Value) override;
   void EmitGPRel32Value(const MCExpr *Value) override;
   void EmitGPRel64Value(const MCExpr *Value) override;
   bool EmitRelocDirective(const MCExpr &Offset, StringRef Name,
                           const MCExpr *Expr, SMLoc Loc) override;
   using MCStreamer::emitFill;
   void emitFill(uint64_t NumBytes, uint8_t FillValue) override;
   void emitFill(const MCExpr &NumBytes, uint64_t FillValue,
                 SMLoc Loc = SMLoc()) override;

include/llvm/MC/MCStreamer.h

public:
   /// pass in a MCExpr for constant integers.
   void EmitSLEB128IntValue(int64_t Value);
 
   /// \brief Special case of EmitValue that avoids the client having to pass in
   /// a MCExpr for MCSymbols.
   void EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
                        bool IsSectionRelative = false);
 
+  /// \brief Emit the expression \p Value into the output as a dtprel
+  /// (64-bit DTP relative) value.
+  ///
+  /// This is used to implement assembler directives such as .dtpreldword on
+  /// targets that support them.
+  virtual void EmitDTPRel64Value(const MCExpr *Value);
+
+  /// \brief Emit the expression \p Value into the output as a dtprel
+  /// (32-bit DTP relative) value.
+  ///
+  /// This is used to implement assembler directives such as .dtprelword on
+  /// targets that support them.
+  virtual void EmitDTPRel32Value(const MCExpr *Value);
+
+  /// \brief Emit the expression \p Value into the output as a tprel
+  /// (64-bit TP relative) value.
+  ///
+  /// This is used to implement assembler directives such as .tpreldword on
+  /// targets that support them.
+  virtual void EmitTPRel64Value(const MCExpr *Value);
+
+  /// \brief Emit the expression \p Value into the output as a tprel
+  /// (32-bit TP relative) value.
+  ///
+  /// This is used to implement assembler directives such as .tprelword on
+  /// targets that support them.
+  virtual void EmitTPRel32Value(const MCExpr *Value);
+
   /// \brief Emit the expression \p Value into the output as a gprel64 (64-bit
   /// GP relative) value.
   ///
   /// This is used to implement assembler directives such as .gpdword on
   /// targets that support them.
   virtual void EmitGPRel64Value(const MCExpr *Value);
 
   /// \brief Emit the expression \p Value into the output as a gprel32 (32-bit

lib/MC/MCAsmBackend.cpp

static const MCFixupKindInfo Builtins[] = {
       {"FK_PCRel_1", 0, 8, MCFixupKindInfo::FKF_IsPCRel},
       {"FK_PCRel_2", 0, 16, MCFixupKindInfo::FKF_IsPCRel},
       {"FK_PCRel_4", 0, 32, MCFixupKindInfo::FKF_IsPCRel},
       {"FK_PCRel_8", 0, 64, MCFixupKindInfo::FKF_IsPCRel},
       {"FK_GPRel_1", 0, 8, 0},
       {"FK_GPRel_2", 0, 16, 0},
       {"FK_GPRel_4", 0, 32, 0},
       {"FK_GPRel_8", 0, 64, 0},
+      {"FK_DTPRel_4", 0, 32, 0},
+      {"FK_DTPRel_8", 0, 64, 0},
+      {"FK_TPRel_4", 0, 32, 0},
+      {"FK_TPRel_8", 0, 64, 0},
       {"FK_SecRel_1", 0, 8, 0},
       {"FK_SecRel_2", 0, 16, 0},
       {"FK_SecRel_4", 0, 32, 0},
       {"FK_SecRel_8", 0, 64, 0}};
 
   assert((size_t)Kind <= array_lengthof(Builtins) && "Unknown fixup kind");
   return Builtins[Kind];
 }
 
 bool MCAsmBackend::fixupNeedsRelaxationAdvanced(
     const MCFixup &Fixup, bool Resolved, uint64_t Value,
     const MCRelaxableFragment *DF, const MCAsmLayout &Layout) const {
   if (!Resolved)
     return true;
   return fixupNeedsRelaxation(Fixup, Value, DF, Layout);
 }

lib/MC/MCAsmStreamer.cpp

public:
   void EmitValueImpl(const MCExpr *Value, unsigned Size,
                      SMLoc Loc = SMLoc()) override;
   void EmitIntValue(uint64_t Value, unsigned Size) override;
 
   void EmitULEB128Value(const MCExpr *Value) override;
 
   void EmitSLEB128Value(const MCExpr *Value) override;
 
+  void EmitDTPRel32Value(const MCExpr *Value) override;
+  void EmitDTPRel64Value(const MCExpr *Value) override;
+  void EmitTPRel32Value(const MCExpr *Value) override;
+  void EmitTPRel64Value(const MCExpr *Value) override;
+
   void EmitGPRel64Value(const MCExpr *Value) override;
 
   void EmitGPRel32Value(const MCExpr *Value) override;
 
 
   void emitFill(uint64_t NumBytes, uint8_t FillValue) override;
 
   void emitFill(const MCExpr &NumBytes, uint64_t FillValue,
if (Value->evaluateAsAbsolute(IntValue)) {
     EmitSLEB128IntValue(IntValue);
     return;
   }
   OS << ".sleb128 ";
   Value->print(OS, MAI);
   EmitEOL();
 }
 
+void MCAsmStreamer::EmitDTPRel64Value(const MCExpr *Value) {
+  assert(MAI->getDTPRel64Directive() != nullptr);
+  OS << MAI->getDTPRel64Directive();
+  Value->print(OS, MAI);
+  EmitEOL();
+}
+
+void MCAsmStreamer::EmitDTPRel32Value(const MCExpr *Value) {
+  assert(MAI->getDTPRel32Directive() != nullptr);
+  OS << MAI->getDTPRel32Directive();
+  Value->print(OS, MAI);
+  EmitEOL();
+}
+
+void MCAsmStreamer::EmitTPRel64Value(const MCExpr *Value) {
+  assert(MAI->getTPRel64Directive() != nullptr);
+  OS << MAI->getTPRel64Directive();
+  Value->print(OS, MAI);
+  EmitEOL();
+}
+
+void MCAsmStreamer::EmitTPRel32Value(const MCExpr *Value) {
+  assert(MAI->getTPRel32Directive() != nullptr);
+  OS << MAI->getTPRel32Directive();
+  Value->print(OS, MAI);
+  EmitEOL();
+}
+
 void MCAsmStreamer::EmitGPRel64Value(const MCExpr *Value) {
   assert(MAI->getGPRel64Directive() != nullptr);
   OS << MAI->getGPRel64Directive();
   Value->print(OS, MAI);
   EmitEOL();
 }
 
 void MCAsmStreamer::EmitGPRel32Value(const MCExpr *Value) {

lib/MC/MCObjectStreamer.cpp

void MCObjectStreamer::EmitCodeAlignment(unsigned ByteAlignment,
   cast<MCAlignFragment>(getCurrentFragment())->setEmitNops(true);
 }
 
 void MCObjectStreamer::emitValueToOffset(const MCExpr *Offset,
                                          unsigned char Value) {
   insert(new MCOrgFragment(*Offset, Value));
 }
 
+// Associate DTPRel32 fixup with data and resize data area
+void MCObjectStreamer::EmitDTPRel32Value(const MCExpr *Value) {
+  MCDataFragment *DF = getOrCreateDataFragment();
+  flushPendingLabels(DF, DF->getContents().size());
+
+  DF->getFixups().push_back(MCFixup::create(DF->getContents().size(),
+                                            Value, FK_DTPRel_4));
+  DF->getContents().resize(DF->getContents().size() + 4, 0);
+}
+
+// Associate DTPRel64 fixup with data and resize data area
+void MCObjectStreamer::EmitDTPRel64Value(const MCExpr *Value) {
+  MCDataFragment *DF = getOrCreateDataFragment();
+  flushPendingLabels(DF, DF->getContents().size());
+
+  DF->getFixups().push_back(MCFixup::create(DF->getContents().size(),
+                                            Value, FK_DTPRel_8));
+  DF->getContents().resize(DF->getContents().size() + 8, 0);
+}
+
+// Associate TPRel32 fixup with data and resize data area
+void MCObjectStreamer::EmitTPRel32Value(const MCExpr *Value) {
+  MCDataFragment *DF = getOrCreateDataFragment();
+  flushPendingLabels(DF, DF->getContents().size());
+
+  DF->getFixups().push_back(MCFixup::create(DF->getContents().size(),
+                                            Value, FK_TPRel_4));
+  DF->getContents().resize(DF->getContents().size() + 4, 0);
+}
+
+// Associate TPRel64 fixup with data and resize data area
+void MCObjectStreamer::EmitTPRel64Value(const MCExpr *Value) {
+  MCDataFragment *DF = getOrCreateDataFragment();
+  flushPendingLabels(DF, DF->getContents().size());
+
+  DF->getFixups().push_back(MCFixup::create(DF->getContents().size(),
+                                            Value, FK_TPRel_8));
+  DF->getContents().resize(DF->getContents().size() + 8, 0);
+}
+
 // Associate GPRel32 fixup with data and resize data area
 void MCObjectStreamer::EmitGPRel32Value(const MCExpr *Value) {
   MCDataFragment *DF = getOrCreateDataFragment();
   flushPendingLabels(DF, DF->getContents().size());
 
   DF->getFixups().push_back(MCFixup::create(DF->getContents().size(), 
                                             Value, FK_GPRel_4));
   DF->getContents().resize(DF->getContents().size() + 4, 0);
 }
 
 // Associate GPRel32 fixup with data and resize data area
 void MCObjectStreamer::EmitGPRel64Value(const MCExpr *Value) {
   MCDataFragment *DF = getOrCreateDataFragment();
   flushPendingLabels(DF, DF->getContents().size());
 
   DF->getFixups().push_back(MCFixup::create(DF->getContents().size(), 
                                             Value, FK_GPRel_4));
   DF->getContents().resize(DF->getContents().size() + 8, 0);
 }

lib/MC/MCStreamer.cpp

assert((!IsSectionRelative || Size == 4) &&
          "SectionRelative value requires 4-bytes");
 
   if (!IsSectionRelative)
     EmitValueImpl(MCSymbolRefExpr::create(Sym, getContext()), Size);
   else
     EmitCOFFSecRel32(Sym);
 }
 
+void MCStreamer::EmitDTPRel64Value(const MCExpr *Value) {
+  report_fatal_error("unsupported directive in streamer");
+}
+
+void MCStreamer::EmitDTPRel32Value(const MCExpr *Value) {
+  report_fatal_error("unsupported directive in streamer");
+}
+
+void MCStreamer::EmitTPRel64Value(const MCExpr *Value) {
+  report_fatal_error("unsupported directive in streamer");
+}
+
+void MCStreamer::EmitTPRel32Value(const MCExpr *Value) {
+  report_fatal_error("unsupported directive in streamer");
+}
+
 void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
   report_fatal_error("unsupported directive in streamer");
 }
 
 void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
   report_fatal_error("unsupported directive in streamer");
 }
 

lib/Target/Mips/AsmParser/MipsAsmParser.cpp

#include "MipsGenAsmMatcher.inc"
   bool parseSetSoftFloatDirective();
   bool parseSetHardFloatDirective();
 
   bool parseSetAssignment();
 
   bool parseDataDirective(unsigned Size, SMLoc L);
   bool parseDirectiveGpWord();
   bool parseDirectiveGpDWord();
+  bool parseDirectiveDtpRelWord();
+  bool parseDirectiveDtpRelDWord();
+  bool parseDirectiveTpRelWord();
+  bool parseDirectiveTpRelDWord();
   bool parseDirectiveModule();
   bool parseDirectiveModuleFP();
   bool parseFpABIValue(MipsABIFlagsSection::FpABIKind &FpABI,
                        StringRef Directive);
 
   bool parseInternalDirectiveReallowModule();
 
   bool eatComma(StringRef ErrorStr);
bool MipsAsmParser::parseDirectiveGpDWord() {
   const MCExpr *Value;
   // EmitGPRel64Value requires an expression, so we are using base class
   // method to evaluate the expression.
   if (getParser().parseExpression(Value))
     return true;
   getParser().getStreamer().EmitGPRel64Value(Value);
 
   if (getLexer().isNot(AsmToken::EndOfStatement))
-    return Error(getLexer().getLoc(), 
+    return Error(getLexer().getLoc(),
                 "unexpected token, expected end of statement");
   Parser.Lex(); // Eat EndOfStatement token.
   return false;
 }
 
+/// parseDirectiveDtpRelWord
+///  ::= .dtprelword tls_sym
+bool MipsAsmParser::parseDirectiveDtpRelWord() {
+  MCAsmParser &Parser = getParser();
+  const MCExpr *Value;
+  // EmitDTPRel32Value requires an expression, so we are using base class
+  // method to evaluate the expression.
+  if (getParser().parseExpression(Value))
+    return true;
+  getParser().getStreamer().EmitDTPRel32Value(Value);
+
+  if (getLexer().isNot(AsmToken::EndOfStatement))
+    return Error(getLexer().getLoc(),
+                "unexpected token, expected end of statement");
+  Parser.Lex(); // Eat EndOfStatement token.
+  return false;
+}
+
+/// parseDirectiveDtpRelDWord
+///  ::= .dtpreldword tls_sym
+bool MipsAsmParser::parseDirectiveDtpRelDWord() {
+  MCAsmParser &Parser = getParser();
+  const MCExpr *Value;
+  // EmitDTPRel64Value requires an expression, so we are using base class
+  // method to evaluate the expression.
+  if (getParser().parseExpression(Value))
+    return true;
+  getParser().getStreamer().EmitDTPRel64Value(Value);
+
+  if (getLexer().isNot(AsmToken::EndOfStatement))
+    return Error(getLexer().getLoc(),
+                "unexpected token, expected end of statement");
+  Parser.Lex(); // Eat EndOfStatement token.
+  return false;
+}
+
+/// parseDirectiveTpRelWord
+///  ::= .tprelword tls_sym
+bool MipsAsmParser::parseDirectiveTpRelWord() {
+  MCAsmParser &Parser = getParser();
+  const MCExpr *Value;
+  // EmitTPRel32Value requires an expression, so we are using base class
+  // method to evaluate the expression.
+  if (getParser().parseExpression(Value))
+    return true;
+  getParser().getStreamer().EmitTPRel32Value(Value);
+
+  if (getLexer().isNot(AsmToken::EndOfStatement))
+    return Error(getLexer().getLoc(),
+                "unexpected token, expected end of statement");
+  Parser.Lex(); // Eat EndOfStatement token.
+  return false;
+}
+
+/// parseDirectiveTpRelDWord
+///  ::= .tpreldword tls_sym
+bool MipsAsmParser::parseDirectiveTpRelDWord() {
+  MCAsmParser &Parser = getParser();
+  const MCExpr *Value;
+  // EmitTPRel64Value requires an expression, so we are using base class
+  // method to evaluate the expression.
+  if (getParser().parseExpression(Value))
+    return true;
+  getParser().getStreamer().EmitTPRel64Value(Value);
+
+  if (getLexer().isNot(AsmToken::EndOfStatement))
+    return Error(getLexer().getLoc(),
+                "unexpected token, expected end of statement");
+  Parser.Lex(); // Eat EndOfStatement token.
+  return false;
+}
+
 bool MipsAsmParser::parseDirectiveOption() {
   MCAsmParser &Parser = getParser();
   // Get the option token.
   AsmToken Tok = Parser.getTok();
   // At the moment only identifiers are supported.
   if (Tok.isNot(AsmToken::Identifier)) {
     Error(Parser.getTok().getLoc(), "unexpected token, expected identifier");
     Parser.eatToEndOfStatement();
if (IDVal == ".gpword") {
     return false;
   }
 
   if (IDVal == ".gpdword") {
     parseDirectiveGpDWord();
     return false;
   }
 
+  if (IDVal == ".dtprelword") {
+    parseDirectiveDtpRelWord();
+    return false;
+  }
+
+  if (IDVal == ".dtpreldword") {
+    parseDirectiveDtpRelDWord();
+    return false;
+  }
+
+  if (IDVal == ".tprelword") {
+    parseDirectiveTpRelWord();
+    return false;
+  }
+
+  if (IDVal == ".tpreldword") {
+    parseDirectiveTpRelDWord();
+    return false;
+  }
+
   if (IDVal == ".word") {
     parseDataDirective(4, DirectiveID.getLoc());
     return false;
   }
 
   if (IDVal == ".hword") {
     parseDataDirective(2, DirectiveID.getLoc());
     return false;

lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp

static unsigned adjustFixupValue(const MCFixup &Fixup, uint64_t Value,
   case Mips::fixup_Mips_CALL_LO16:
   case Mips::fixup_MICROMIPS_LO16:
   case Mips::fixup_MICROMIPS_GOT_PAGE:
   case Mips::fixup_MICROMIPS_GOT_OFST:
   case Mips::fixup_MICROMIPS_GOT_DISP:
   case Mips::fixup_MIPS_PCLO16:
     Value &= 0xffff;
     break;
+  case FK_DTPRel_4:
+  case FK_DTPRel_8:
+  case FK_TPRel_4:
+  case FK_TPRel_8:
   case FK_GPRel_4:
   case FK_Data_4:
   case FK_Data_8:
   case Mips::fixup_Mips_SUB:
   case Mips::fixup_MICROMIPS_SUB:
     break;
   case Mips::fixup_Mips_PC16:
     // The displacement is then divided by 4 to give us an 18 bit

lib/Target/Mips/MCTargetDesc/MipsELFObjectWriter.cpp

if (IsPCRel) {
 
     llvm_unreachable("invalid PC-relative fixup kind!");
   }
 
   switch (Kind) {
   case Mips::fixup_Mips_64:
   case FK_Data_8:
     return ELF::R_MIPS_64;
+  case FK_DTPRel_4:
+    return ELF::R_MIPS_TLS_DTPREL32;
+  case FK_DTPRel_8:
+    return ELF::R_MIPS_TLS_DTPREL64;
+  case FK_TPRel_4:
+    return ELF::R_MIPS_TLS_TPREL32;
+  case FK_TPRel_8:
+    return ELF::R_MIPS_TLS_TPREL64;
   case FK_GPRel_4:
     if (isN64()) {
       unsigned Type = (unsigned)ELF::R_MIPS_NONE;
       Type = setRType((unsigned)ELF::R_MIPS_GPREL32, Type);
       Type = setRType2((unsigned)ELF::R_MIPS_64, Type);
       Type = setRType3((unsigned)ELF::R_MIPS_NONE, Type);
       return Type;
     }

lib/Target/Mips/MCTargetDesc/MipsMCAsmInfo.cpp

MipsMCAsmInfo::MipsMCAsmInfo(const Triple &TheTriple) {
   AlignmentIsInBytes          = false;
   Data16bitsDirective         = "\t.2byte\t";
   Data32bitsDirective         = "\t.4byte\t";
   Data64bitsDirective         = "\t.8byte\t";
   CommentString               = "#";
   ZeroDirective               = "\t.space\t";
   GPRel32Directive            = "\t.gpword\t";
   GPRel64Directive            = "\t.gpdword\t";
+  DTPRel32Directive           = "\t.dtprelword\t";
+  DTPRel64Directive           = "\t.dtpreldword\t";
+  TPRel32Directive            = "\t.tprelword\t";
+  TPRel64Directive            = "\t.tpreldword\t";
   UseAssignmentForEHBegin = true;
   SupportsDebugInformation = true;
   ExceptionsType = ExceptionHandling::DwarfCFI;
   DwarfRegNumForCFI = true;
   HasMipsExpressions = true;
 
   // Enable IAS by default for O32.
   if (TheTriple.getArch() == Triple::mips ||
       TheTriple.getArch() == Triple::mipsel)
     UseIntegratedAssembler = true;
 }

test/MC/Mips/relocation.s

// DATA-NEXT:  0070: 24620004 24620000 24620000 64620000
                                            // ?????: R_MIPS_DELETE
 
         .set mips64
         daddiu $2, $3, %higher(foo)        // RELOC: R_MIPS_HIGHER foo
                                            // ENCBE: daddiu $2, $3, %higher(foo) # encoding: [0x64,0x62,A,A]
                                            // ENCLE: daddiu $2, $3, %higher(foo) # encoding: [A,A,0x62,0x64]
                                            // FIXUP: # fixup A - offset: 0, value: %higher(foo), kind: fixup_Mips_HIGHER
 
-// DATA-NEXT:  0080: 64620000 24620000 24620000 24620000
+// DATA-NEXT:  0080: 64620000 24620000 24620000 00000000
         daddiu $2, $3, %highest(foo)       // RELOC: R_MIPS_HIGHEST foo
                                            // ENCBE: daddiu $2, $3, %highest(foo) # encoding: [0x64,0x62,A,A]
                                            // ENCLE: daddiu $2, $3, %highest(foo) # encoding: [A,A,0x62,0x64]
                                            // FIXUP: # fixup A - offset: 0, value: %highest(foo), kind: fixup_Mips_HIGHEST
 
         .set mips0
         addiu $2, $3, %call_hi(foo)        // RELOC: R_MIPS_CALL_HI16 foo
                                            // ENCBE: addiu $2, $3, %call_hi(foo) # encoding: [0x24,0x62,A,A]
                                            // ENCLE: addiu $2, $3, %call_hi(foo) # encoding: [A,A,0x62,0x24]
                                            // FIXUP: # fixup A - offset: 0, value: %call_hi(foo), kind: fixup_Mips_CALL_HI16
 
-// DATA-NEXT:  0090: 24620000 24620000 24620000 24620000
         addiu $2, $3, %call_lo(foo)        // RELOC: R_MIPS_CALL_LO16 foo
                                            // ENCBE: addiu $2, $3, %call_lo(foo) # encoding: [0x24,0x62,A,A]
                                            // ENCLE: addiu $2, $3, %call_lo(foo) # encoding: [A,A,0x62,0x24]
                                            // FIXUP: # fixup A - offset: 0, value: %call_lo(foo), kind: fixup_Mips_CALL_LO16
 
                                            // ?????: R_MIPS_SCN_DISP foo
                                            // ?????: R_MIPS_REL16 foo
                                            // ?????: R_MIPS_ADD_IMMEDIATE foo
                                            // ?????: R_MIPS_PJUMP foo
                                            // ?????: R_MIPS_RELGOT foo
 //      jalr $25                           // ?????: R_MIPS_JALR foo
 
                                            // ?????: R_MIPS_TLS_DTPMOD32 foo
-//      .dtprelword foo                    // FIXME: R_MIPS_TLS_DTPREL32 foo
+        .dtprelword foo                    // RELOC: R_MIPS_TLS_DTPREL32 foo
+
+// DATA-NEXT:  0090: 00000000 00000000 24620000 24620000
                                            // ?????: R_MIPS_TLS_DTPMOD64 foo
-//      .dtpreldword foo                   // FIXME: R_MIPS_TLS_DTPREL64 foo
+        .dtpreldword foo                   // RELOC: R_MIPS_TLS_DTPREL64 foo
         addiu $2, $3, %tlsgd(foo)          // RELOC: R_MIPS_TLS_GD foo
                                            // ENCBE: addiu $2, $3, %tlsgd(foo) # encoding: [0x24,0x62,A,A]
                                            // ENCLE: addiu $2, $3, %tlsgd(foo) # encoding: [A,A,0x62,0x24]
                                            // FIXUP: # fixup A - offset: 0, value: %tlsgd(foo), kind: fixup_Mips_TLSGD
 
         addiu $2, $3, %tlsldm(foo)         // RELOC: R_MIPS_TLS_LDM foo
                                            // ENCBE: addiu $2, $3, %tlsldm(foo) # encoding: [0x24,0x62,A,A]
                                            // ENCLE: addiu $2, $3, %tlsldm(foo) # encoding: [A,A,0x62,0x24]
                                            // FIXUP: # fixup A - offset: 0, value: %tlsldm(foo), kind: fixup_Mips_TLSLDM
 
+// DATA-NEXT:  00A0: 24620000 24620000 24620000 00000000
         addiu $2, $3, %dtprel_hi(foo)      // RELOC: R_MIPS_TLS_DTPREL_HI16 foo
                                            // ENCBE: addiu $2, $3, %dtprel_hi(foo) # encoding: [0x24,0x62,A,A]
                                            // ENCLE: addiu $2, $3, %dtprel_hi(foo) # encoding: [A,A,0x62,0x24]
                                            // FIXUP: # fixup A - offset: 0, value: %dtprel_hi(foo), kind: fixup_Mips_DTPREL_HI
 
         addiu $2, $3, %dtprel_lo(foo)      // RELOC: R_MIPS_TLS_DTPREL_LO16 foo
                                            // ENCBE: addiu $2, $3, %dtprel_lo(foo) # encoding: [0x24,0x62,A,A]
                                            // ENCLE: addiu $2, $3, %dtprel_lo(foo) # encoding: [A,A,0x62,0x24]
                                            // FIXUP: # fixup A - offset: 0, value: %dtprel_lo(foo), kind: fixup_Mips_DTPREL_LO
 
         addiu $2, $3, %gottprel(foo)       // RELOC: R_MIPS_TLS_GOTTPREL foo
                                            // ENCBE: addiu $2, $3, %gottprel(foo) # encoding: [0x24,0x62,A,A]
                                            // ENCLE: addiu $2, $3, %gottprel(foo) # encoding: [A,A,0x62,0x24]
                                            // FIXUP: # fixup A - offset: 0, value: %gottprel(foo), kind: fixup_Mips_GOTTPREL
 
-//      .tprelword foo                     // FIXME: R_MIPS_TLS_TPREL32 foo
-//      .tpreldword foo                    // FIXME: R_MIPS_TLS_TPREL64 foo
+        .tprelword foo                     // RELOC: R_MIPS_TLS_TPREL32 foo
+
+// DATA-NEXT:  00B0: 00000000 00000000 24620000 24620000
+        .tpreldword foo                    // RELOC: R_MIPS_TLS_TPREL64 foo
         addiu $2, $3, %tprel_hi(foo)       // RELOC: R_MIPS_TLS_TPREL_HI16 foo
                                            // ENCBE: addiu $2, $3, %tprel_hi(foo) # encoding: [0x24,0x62,A,A]
                                            // ENCLE: addiu $2, $3, %tprel_hi(foo) # encoding: [A,A,0x62,0x24]
                                            // FIXUP: # fixup A - offset: 0, value: %tprel_hi(foo), kind: fixup_Mips_TPREL_HI
 
         addiu $2, $3, %tprel_lo(foo)       // RELOC: R_MIPS_TLS_TPREL_LO16 foo
                                            // ENCBE: addiu $2, $3, %tprel_lo(foo) # encoding: [0x24,0x62,A,A]
                                            // ENCLE: addiu $2, $3, %tprel_lo(foo) # encoding: [A,A,0x62,0x24]
                                            // FIXUP: # fixup A - offset: 0, value: %tprel_lo(foo), kind: fixup_Mips_TPREL_LO
 
+// DATA-NEXT:  00C0: D85FFFFF CBFFFFFF EC580000 EC480000
                                            // ?????: R_MIPS_GLOB_DAT foo
         .set mips32r6
         beqzc $2, foo                      // RELOC: R_MIPS_PC21_S2 foo
                                            // ENCBE: beqzc $2, foo # encoding: [0xd8,0b010AAAAA,A,A]
                                            // ENCLE: beqzc $2, foo # encoding: [A,A,0b010AAAAA,0xd8]
                                            // FIXUP: # fixup A - offset: 0, value: foo-4, kind: fixup_MIPS_PC21_S2
 
         bc foo                             // RELOC: R_MIPS_PC26_S2 foo
                                            // ENCBE: bc foo # encoding: [0b110010AA,A,A,A]
                                            // ENCLE: bc foo # encoding: [A,A,A,0b110010AA]
                                            // FIXUP: # fixup A - offset: 0, value: foo-4, kind: fixup_MIPS_PC26_S2
 
         .set mips64r6
         ldpc $2, foo                       // RELOC: R_MIPS_PC18_S3 foo
                                            // ENCBE: ldpc $2, foo # encoding: [0xec,0b010110AA,A,A]
                                            // ENCLE: ldpc $2, foo # encoding: [A,A,0b010110AA,0xec]
                                            // FIXUP: # fixup A - offset: 0, value: foo, kind: fixup_Mips_PC18_S3
 
         .set mips32r6
         lwpc $2, foo                       // RELOC: R_MIPS_PC19_S2 foo
                                            // ENCBE: lwpc $2, foo # encoding: [0xec,0b01001AAA,A,A]
                                            // ENCLE: lwpc $2, foo # encoding: [A,A,0b01001AAA,0xec]
                                            // FIXUP: # fixup A - offset: 0, value: foo, kind: fixup_MIPS_PC19_S2
 
+// DATA-NEXT:  00D0: 24620000 24620000 00000000
         addiu $2, $3, %pcrel_hi(foo)       // RELOC: R_MIPS_PCHI16 foo
                                            // ENCBE: addiu $2, $3, %pcrel_hi(foo) # encoding: [0x24,0x62,A,A]
                                            // ENCLE: addiu $2, $3, %pcrel_hi(foo) # encoding: [A,A,0x62,0x24]
                                            // FIXUP: # fixup A - offset: 0, value: %pcrel_hi(foo), kind: fixup_MIPS_PCHI16
 
         addiu $2, $3, %pcrel_lo(foo)       // RELOC: R_MIPS_PCLO16 foo
                                            // ENCBE: addiu $2, $3, %pcrel_lo(foo) # encoding: [0x24,0x62,A,A]
                                            // ENCLE: addiu $2, $3, %pcrel_lo(foo) # encoding: [A,A,0x62,0x24]