Drop prelink support.

The way prelink used to work was

* The compiler decides if a given section only has relocations that
are know to point to the same DSO. If so, it names it
.data.rel.ro.local<something>.
* The static linker puts all of these together.
* The prelinker program assigns addresses to each library and resolves
the local relocations.

There are many problems with this:
* It is incompatible with address space randomization.
* The information passed by the compiler is redundant. The linker
knows if a given relocation is in the same DSO or not. If could sort
by that if so desired.
* There are newer ways of speeding up DSO (gnu hash for example).
* Even if we want to implement this again in the compiler, the previous
  implementation is pretty broken. It talks about relocations that are
  "resolved by the static linker". If they are resolved, there are none
  left for the prelinker. What one needs to track is if an expression
  will require only dynamic relocations that point to the same DSO.

At this point it looks like the prelinker is an historical curiosity.
For example, fedora has retired it because it failed to build for two
releases
(http://pkgs.fedoraproject.org/cgit/prelink.git/commit/?id=eb43100a8331d91c801ee3dcdb0a0bb9babfdc1f)

This patch removes support for it. That is, it stops printing the
".local" sections.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@253280 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/CodeGen/MachineConstantPool.h b/include/llvm/CodeGen/MachineConstantPool.h
index c82935a251b77ef8a978bb3fe1a6bfa04013e8e3..d2036c4a29a554e38b96087be22612b84d5cdaa3 100644 (file)
--- a/include/llvm/CodeGen/MachineConstantPool.h
+++ b/include/llvm/CodeGen/MachineConstantPool.h
@@ -46,12 +46,6 @@ public:
   ///
   Type *getType() const { return Ty; }
 
   ///
   Type *getType() const { return Ty; }
 

-  /// getRelocationInfo - This method classifies the entry according to
-  /// whether or not it may generate a relocation entry.  This must be
-  /// conservative, so if it might codegen to a relocatable entry, it should say
-  /// so.  The return values are the same as Constant::getRelocationInfo().
-  virtual unsigned getRelocationInfo() const = 0;
-

   virtual int getExistingMachineCPValue(MachineConstantPool *CP,
                                         unsigned Alignment) = 0;
 
   virtual int getExistingMachineCPValue(MachineConstantPool *CP,
                                         unsigned Alignment) = 0;
 


@@ -106,18 +100,10 @@ public:
 
   Type *getType() const;
 
 
   Type *getType() const;
 

-  /// getRelocationInfo - This method classifies the entry according to
-  /// whether or not it may generate a relocation entry.  This must be
-  /// conservative, so if it might codegen to a relocatable entry, it should say
-  /// so.  The return values are:
-  ///
-  ///  0: This constant pool entry is guaranteed to never have a relocation
-  ///     applied to it (because it holds a simple constant like '4').
-  ///  1: This entry has relocations, but the entries are guaranteed to be
-  ///     resolvable by the static linker, so the dynamic linker will never see
-  ///     them.
-  ///  2: This entry may have arbitrary relocations.
-  unsigned getRelocationInfo() const;
+  /// This method classifies the entry according to whether or not it may
+  /// generate a relocation entry.  This must be conservative, so if it might
+  /// codegen to a relocatable entry, it should say so.
+  bool needsRelocation() const;

 
   SectionKind getSectionKind(const DataLayout *DL) const;
 };
 
   SectionKind getSectionKind(const DataLayout *DL) const;
 };

diff --git a/include/llvm/IR/Constant.h b/include/llvm/IR/Constant.h
index 555efc41c06c9fd3015c0a1219c53a7801cff6f7..bb88905aa57a0490bbf4189d2d37b5acacf26b1b 100644 (file)
--- a/include/llvm/IR/Constant.h
+++ b/include/llvm/IR/Constant.h
@@ -86,26 +86,12 @@ public:
   /// exprs and other dangling things.
   bool isConstantUsed() const;
 
   /// exprs and other dangling things.
   bool isConstantUsed() const;
 

-  enum PossibleRelocationsTy {
-    NoRelocation = 0,
-    LocalRelocation = 1,
-    GlobalRelocations = 2
-  };
-

   /// This method classifies the entry according to whether or not it may
   /// generate a relocation entry.  This must be conservative, so if it might
   /// This method classifies the entry according to whether or not it may
   /// generate a relocation entry.  This must be conservative, so if it might

-  /// codegen to a relocatable entry, it should say so.  The return values are:
-  ///
-  ///  NoRelocation: This constant pool entry is guaranteed to never have a
-  ///     relocation applied to it (because it holds a simple constant like
-  ///     '4').
-  ///  LocalRelocation: This entry has relocations, but the entries are
-  ///     guaranteed to be resolvable by the static linker, so the dynamic
-  ///     linker will never see them.
-  ///  GlobalRelocations: This entry may have arbitrary relocations.
+  /// codegen to a relocatable entry, it should say so.

   ///
   /// FIXME: This really should not be in IR.
   ///
   /// FIXME: This really should not be in IR.

-  PossibleRelocationsTy getRelocationInfo() const;
+  bool needsRelocation() const;

 
   /// getAggregateElement - For aggregates (struct/array/vector) return the
   /// constant that corresponds to the specified element if possible, or null if
 
   /// getAggregateElement - For aggregates (struct/array/vector) return the
   /// constant that corresponds to the specified element if possible, or null if

diff --git a/include/llvm/MC/MCObjectFileInfo.h b/include/llvm/MC/MCObjectFileInfo.h
index 6e325cc21f23d2c739725c215d1860dabc169287..2ba945f9d35bfda35ace2c84ea44e62fa8124db1 100644 (file)
--- a/include/llvm/MC/MCObjectFileInfo.h
+++ b/include/llvm/MC/MCObjectFileInfo.h
@@ -150,9 +150,7 @@ protected:
 
   // ELF specific sections.
   MCSection *DataRelSection;
 
   // ELF specific sections.
   MCSection *DataRelSection;

-  const MCSection *DataRelLocalSection;

   MCSection *DataRelROSection;
   MCSection *DataRelROSection;

-  MCSection *DataRelROLocalSection;

   MCSection *MergeableConst4Section;
   MCSection *MergeableConst8Section;
   MCSection *MergeableConst16Section;
   MCSection *MergeableConst4Section;
   MCSection *MergeableConst8Section;
   MCSection *MergeableConst16Section;


@@ -279,11 +277,7 @@ public:
 
   // ELF specific sections.
   MCSection *getDataRelSection() const { return DataRelSection; }
 
   // ELF specific sections.
   MCSection *getDataRelSection() const { return DataRelSection; }

-  const MCSection *getDataRelLocalSection() const {
-    return DataRelLocalSection;
-  }

   MCSection *getDataRelROSection() const { return DataRelROSection; }
   MCSection *getDataRelROSection() const { return DataRelROSection; }

-  MCSection *getDataRelROLocalSection() const { return DataRelROLocalSection; }

   const MCSection *getMergeableConst4Section() const {
     return MergeableConst4Section;
   }
   const MCSection *getMergeableConst4Section() const {
     return MergeableConst4Section;
   }

diff --git a/include/llvm/MC/SectionKind.h b/include/llvm/MC/SectionKind.h
index 9e8b68f4340c95d8e63a4dda13a4537121b1513f..7a5e7d99e26a2bd30b11862108f081f4514d0e67 100644 (file)
--- a/include/llvm/MC/SectionKind.h
+++ b/include/llvm/MC/SectionKind.h
@@ -104,12 +104,6 @@ class SectionKind {
            /// globals.
            DataRel,
 
            /// globals.
            DataRel,
 

-               /// DataRelLocal - This is writeable data that has a non-zero
-               /// initializer and has relocations in it, but all of the
-               /// relocations are known to be within the final linked image
-               /// the global is linked into.
-               DataRelLocal,
-

                    /// DataNoRel - This is writeable data that has a non-zero
                    /// initializer, but whose initializer is known to have no
                    /// relocations.
                    /// DataNoRel - This is writeable data that has a non-zero
                    /// initializer, but whose initializer is known to have no
                    /// relocations.


@@ -121,15 +115,7 @@ class SectionKind {
            /// can write to them.  If it chooses to, the dynamic linker can
            /// mark the pages these globals end up on as read-only after it is
            /// done with its relocation phase.
            /// can write to them.  If it chooses to, the dynamic linker can
            /// mark the pages these globals end up on as read-only after it is
            /// done with its relocation phase.

-           ReadOnlyWithRel,
-
-               /// ReadOnlyWithRelLocal - This is data that is readonly by the
-               /// program, but must be writeable so that the dynamic linker
-               /// can perform relocations in it.  This is used when we know
-               /// that all the relocations are to globals in this final
-               /// linked image.
-               ReadOnlyWithRelLocal
-
+           ReadOnlyWithRel

   } K : 8;
 public:
 
   } K : 8;
 public:
 


@@ -179,21 +165,13 @@ public:
   bool isCommon() const { return K == Common; }
 
   bool isDataRel() const {
   bool isCommon() const { return K == Common; }
 
   bool isDataRel() const {

-    return K == DataRel || K == DataRelLocal || K == DataNoRel;
-  }
-
-  bool isDataRelLocal() const {
-    return K == DataRelLocal || K == DataNoRel;
+    return K == DataRel || K == DataNoRel;

   }
 
   bool isDataNoRel() const { return K == DataNoRel; }
 
   bool isReadOnlyWithRel() const {
   }
 
   bool isDataNoRel() const { return K == DataNoRel; }
 
   bool isReadOnlyWithRel() const {

-    return K == ReadOnlyWithRel || K == ReadOnlyWithRelLocal;
-  }
-
-  bool isReadOnlyWithRelLocal() const {
-    return K == ReadOnlyWithRelLocal;
+    return K == ReadOnlyWithRel;

   }
 private:
   static SectionKind get(Kind K) {
   }
 private:
   static SectionKind get(Kind K) {


@@ -225,12 +203,8 @@ public:
   static SectionKind getBSSExtern() { return get(BSSExtern); }
   static SectionKind getCommon() { return get(Common); }
   static SectionKind getDataRel() { return get(DataRel); }
   static SectionKind getBSSExtern() { return get(BSSExtern); }
   static SectionKind getCommon() { return get(Common); }
   static SectionKind getDataRel() { return get(DataRel); }

-  static SectionKind getDataRelLocal() { return get(DataRelLocal); }

   static SectionKind getDataNoRel() { return get(DataNoRel); }
   static SectionKind getReadOnlyWithRel() { return get(ReadOnlyWithRel); }
   static SectionKind getDataNoRel() { return get(DataNoRel); }
   static SectionKind getReadOnlyWithRel() { return get(ReadOnlyWithRel); }

-  static SectionKind getReadOnlyWithRelLocal(){
-    return get(ReadOnlyWithRelLocal);
-  }

 };
 
 } // end namespace llvm
 };
 
 } // end namespace llvm

diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index 5ec451e512b18fedf1282a3fe7caf7336cdeae13..f1e4cb813df2201f94b55430bc36d5d9a72be5f5 100644 (file)
--- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -357,10 +357,10 @@ void AsmPrinter::EmitEmulatedTLSControlVariable(const GlobalVariable *GV,
                                                 bool AllZeroInitValue) {
   // If there is init value, use .data.rel.local section;
   // otherwise use the .data section.
                                                 bool AllZeroInitValue) {
   // If there is init value, use .data.rel.local section;
   // otherwise use the .data section.

-  MCSection *TLSVarSection = const_cast<MCSection*>(
-      (GV->hasInitializer() && !AllZeroInitValue)
-      ? getObjFileLowering().getDataRelLocalSection()
-      : getObjFileLowering().getDataSection());
+  MCSection *TLSVarSection =
+      const_cast<MCSection *>((GV->hasInitializer() && !AllZeroInitValue)
+                                  ? getObjFileLowering().getDataRelSection()
+                                  : getObjFileLowering().getDataSection());

   OutStreamer->SwitchSection(TLSVarSection);
   MCSymbol *GVSym = getSymbol(GV);
   EmitLinkage(GV, EmittedSym);  // same linkage as GV
   OutStreamer->SwitchSection(TLSVarSection);
   MCSymbol *GVSym = getSymbol(GV);
   EmitLinkage(GV, EmittedSym);  // same linkage as GV


@@ -390,8 +390,6 @@ void AsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) {
   bool IsEmuTLSVar =
       GV->getThreadLocalMode() != llvm::GlobalVariable::NotThreadLocal &&
       TM.Options.EmulatedTLS;
   bool IsEmuTLSVar =
       GV->getThreadLocalMode() != llvm::GlobalVariable::NotThreadLocal &&
       TM.Options.EmulatedTLS;

-  assert((!IsEmuTLSVar || getObjFileLowering().getDataRelLocalSection()) &&
-         "Need relocatable local section for emulated TLS variables");

   assert(!(IsEmuTLSVar && GV->hasCommonLinkage()) &&
          "No emulated TLS variables in the common section");
 
   assert(!(IsEmuTLSVar && GV->hasCommonLinkage()) &&
          "No emulated TLS variables in the common section");
 

diff --git a/lib/CodeGen/MachineFunction.cpp b/lib/CodeGen/MachineFunction.cpp
index 5e614c6cb2e5f665a2f543135fa668abb1989d98..fa6849fcfdc6d236b3bb18225674de00fde166d7 100644 (file)
--- a/lib/CodeGen/MachineFunction.cpp
+++ b/lib/CodeGen/MachineFunction.cpp
@@ -816,42 +816,26 @@ Type *MachineConstantPoolEntry::getType() const {
   return Val.ConstVal->getType();
 }
 
   return Val.ConstVal->getType();
 }
 

-
-unsigned MachineConstantPoolEntry::getRelocationInfo() const {
+bool MachineConstantPoolEntry::needsRelocation() const {

   if (isMachineConstantPoolEntry())
   if (isMachineConstantPoolEntry())

-    return Val.MachineCPVal->getRelocationInfo();
-  return Val.ConstVal->getRelocationInfo();
+    return true;
+  return Val.ConstVal->needsRelocation();

 }
 
 SectionKind
 MachineConstantPoolEntry::getSectionKind(const DataLayout *DL) const {
 }
 
 SectionKind
 MachineConstantPoolEntry::getSectionKind(const DataLayout *DL) const {

-  SectionKind Kind;
-  switch (getRelocationInfo()) {
+  if (needsRelocation())
+    return SectionKind::getReadOnlyWithRel();
+  switch (DL->getTypeAllocSize(getType())) {
+  case 4:
+    return SectionKind::getMergeableConst4();
+  case 8:
+    return SectionKind::getMergeableConst8();
+  case 16:
+    return SectionKind::getMergeableConst16();

   default:
   default:

-    llvm_unreachable("Unknown section kind");
-  case Constant::GlobalRelocations:
-    Kind = SectionKind::getReadOnlyWithRel();
-    break;
-  case Constant::LocalRelocation:
-    Kind = SectionKind::getReadOnlyWithRelLocal();
-    break;
-  case Constant::NoRelocation:
-    switch (DL->getTypeAllocSize(getType())) {
-    case 4:
-      Kind = SectionKind::getMergeableConst4();
-      break;
-    case 8:
-      Kind = SectionKind::getMergeableConst8();
-      break;
-    case 16:
-      Kind = SectionKind::getMergeableConst16();
-      break;
-    default:
-      Kind = SectionKind::getReadOnly();
-      break;
-    }
+    return SectionKind::getReadOnly();

   }
   }

-  return Kind;

 }
 
 MachineConstantPool::~MachineConstantPool() {
 }
 
 MachineConstantPool::~MachineConstantPool() {

diff --git a/lib/CodeGen/TargetLoweringObjectFileImpl.cpp b/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
index 372ac403769dbd0409720df41edee9cfc438dd2c..7043f7911a39d43bf7f062db93ff01577f004bc5 100644 (file)
--- a/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
+++ b/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
@@ -235,12 +235,8 @@ static StringRef getSectionPrefixForGlobal(SectionKind Kind) {
     return ".tbss";
   if (Kind.isDataNoRel())
     return ".data";
     return ".tbss";
   if (Kind.isDataNoRel())
     return ".data";

-  if (Kind.isDataRelLocal())
-    return ".data.rel.local";

   if (Kind.isDataRel())
     return ".data.rel";
   if (Kind.isDataRel())
     return ".data.rel";

-  if (Kind.isReadOnlyWithRelLocal())
-    return ".data.rel.ro.local";

   assert(Kind.isReadOnlyWithRel() && "Unknown section kind");
   return ".data.rel.ro";
 }
   assert(Kind.isReadOnlyWithRel() && "Unknown section kind");
   return ".data.rel.ro";
 }


@@ -362,7 +358,6 @@ MCSection *TargetLoweringObjectFileELF::getSectionForConstant(
   if (Kind.isReadOnly())
     return ReadOnlySection;
 
   if (Kind.isReadOnly())
     return ReadOnlySection;
 

-  if (Kind.isReadOnlyWithRelLocal()) return DataRelROLocalSection;

   assert(Kind.isReadOnlyWithRel() && "Unknown section kind");
   return DataRelROSection;
 }
   assert(Kind.isReadOnlyWithRel() && "Unknown section kind");
   return DataRelROSection;
 }

diff --git a/lib/IR/Constants.cpp b/lib/IR/Constants.cpp
index 457b69d2f396f227ff8f185eb5e650c3feb0a7b0..550d9a89a65efbcfff3bc3133a52b56a29f24b11 100644 (file)
--- a/lib/IR/Constants.cpp
+++ b/lib/IR/Constants.cpp
@@ -414,16 +414,13 @@ bool Constant::isConstantUsed() const {
   return false;
 }
 
   return false;
 }
 

-Constant::PossibleRelocationsTy Constant::getRelocationInfo() const {
-  if (const GlobalValue *GV = dyn_cast<GlobalValue>(this)) {
-    if (GV->hasLocalLinkage() || GV->hasHiddenVisibility())
-      return LocalRelocation;  // Local to this file/library.
-    return GlobalRelocations;    // Global reference.
-  }
-  
+bool Constant::needsRelocation() const {
+  if (isa<GlobalValue>(this))
+    return true; // Global reference.
+

   if (const BlockAddress *BA = dyn_cast<BlockAddress>(this))
   if (const BlockAddress *BA = dyn_cast<BlockAddress>(this))

-    return BA->getFunction()->getRelocationInfo();
-  
+    return BA->getFunction()->needsRelocation();
+

   // While raw uses of blockaddress need to be relocated, differences between
   // two of them don't when they are for labels in the same function.  This is a
   // common idiom when creating a table for the indirect goto extension, so we
   // While raw uses of blockaddress need to be relocated, differences between
   // two of them don't when they are for labels in the same function.  This is a
   // common idiom when creating a table for the indirect goto extension, so we


@@ -432,20 +429,18 @@ Constant::PossibleRelocationsTy Constant::getRelocationInfo() const {
     if (CE->getOpcode() == Instruction::Sub) {
       ConstantExpr *LHS = dyn_cast<ConstantExpr>(CE->getOperand(0));
       ConstantExpr *RHS = dyn_cast<ConstantExpr>(CE->getOperand(1));
     if (CE->getOpcode() == Instruction::Sub) {
       ConstantExpr *LHS = dyn_cast<ConstantExpr>(CE->getOperand(0));
       ConstantExpr *RHS = dyn_cast<ConstantExpr>(CE->getOperand(1));

-      if (LHS && RHS &&
-          LHS->getOpcode() == Instruction::PtrToInt &&
+      if (LHS && RHS && LHS->getOpcode() == Instruction::PtrToInt &&

           RHS->getOpcode() == Instruction::PtrToInt &&
           isa<BlockAddress>(LHS->getOperand(0)) &&
           isa<BlockAddress>(RHS->getOperand(0)) &&
           cast<BlockAddress>(LHS->getOperand(0))->getFunction() ==
           RHS->getOpcode() == Instruction::PtrToInt &&
           isa<BlockAddress>(LHS->getOperand(0)) &&
           isa<BlockAddress>(RHS->getOperand(0)) &&
           cast<BlockAddress>(LHS->getOperand(0))->getFunction() ==

-            cast<BlockAddress>(RHS->getOperand(0))->getFunction())
-        return NoRelocation;
+              cast<BlockAddress>(RHS->getOperand(0))->getFunction())
+        return false;

     }
 
     }
 

-  PossibleRelocationsTy Result = NoRelocation;
+  bool Result = false;

   for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
   for (unsigned i = 0, e = getNumOperands(); i != e; ++i)

-    Result = std::max(Result,
-                      cast<Constant>(getOperand(i))->getRelocationInfo());
+    Result |= cast<Constant>(getOperand(i))->needsRelocation();

 
   return Result;
 }
 
   return Result;
 }

diff --git a/lib/MC/MCObjectFileInfo.cpp b/lib/MC/MCObjectFileInfo.cpp
index 253564e6d4979391813bc850ee7356912367cbab..943eaef0386a6b5ef29c2ba1d2dfb1da54f88b87 100644 (file)
--- a/lib/MC/MCObjectFileInfo.cpp
+++ b/lib/MC/MCObjectFileInfo.cpp
@@ -455,15 +455,9 @@ void MCObjectFileInfo::initELFMCObjectFileInfo(Triple T) {
   DataRelSection = Ctx->getELFSection(".data.rel", ELF::SHT_PROGBITS,
                                       ELF::SHF_ALLOC | ELF::SHF_WRITE);
 
   DataRelSection = Ctx->getELFSection(".data.rel", ELF::SHT_PROGBITS,
                                       ELF::SHF_ALLOC | ELF::SHF_WRITE);
 

-  DataRelLocalSection = Ctx->getELFSection(".data.rel.local", ELF::SHT_PROGBITS,
-                                           ELF::SHF_ALLOC | ELF::SHF_WRITE);
-

   DataRelROSection = Ctx->getELFSection(".data.rel.ro", ELF::SHT_PROGBITS,
                                         ELF::SHF_ALLOC | ELF::SHF_WRITE);
 
   DataRelROSection = Ctx->getELFSection(".data.rel.ro", ELF::SHT_PROGBITS,
                                         ELF::SHF_ALLOC | ELF::SHF_WRITE);
 

-  DataRelROLocalSection = Ctx->getELFSection(
-      ".data.rel.ro.local", ELF::SHT_PROGBITS, ELF::SHF_ALLOC | ELF::SHF_WRITE);
-

   MergeableConst4Section =
       Ctx->getELFSection(".rodata.cst4", ELF::SHT_PROGBITS,
                          ELF::SHF_ALLOC | ELF::SHF_MERGE, 4, "");
   MergeableConst4Section =
       Ctx->getELFSection(".rodata.cst4", ELF::SHT_PROGBITS,
                          ELF::SHF_ALLOC | ELF::SHF_MERGE, 4, "");

diff --git a/lib/MC/MCParser/ELFAsmParser.cpp b/lib/MC/MCParser/ELFAsmParser.cpp
index 5f8a6039afd0f7aec4c5be6c410b32d74fc054cc..e00a1afc0e465ccc391ce9f1add1e117e0731102 100644 (file)
--- a/lib/MC/MCParser/ELFAsmParser.cpp
+++ b/lib/MC/MCParser/ELFAsmParser.cpp
@@ -51,8 +51,6 @@ public:
       &ELFAsmParser::ParseSectionDirectiveDataRel>(".data.rel");
     addDirectiveHandler<
       &ELFAsmParser::ParseSectionDirectiveDataRelRo>(".data.rel.ro");
       &ELFAsmParser::ParseSectionDirectiveDataRel>(".data.rel");
     addDirectiveHandler<
       &ELFAsmParser::ParseSectionDirectiveDataRelRo>(".data.rel.ro");

-    addDirectiveHandler<
-      &ELFAsmParser::ParseSectionDirectiveDataRelRoLocal>(".data.rel.ro.local");

     addDirectiveHandler<
       &ELFAsmParser::ParseSectionDirectiveEhFrame>(".eh_frame");
     addDirectiveHandler<&ELFAsmParser::ParseDirectiveSection>(".section");
     addDirectiveHandler<
       &ELFAsmParser::ParseSectionDirectiveEhFrame>(".eh_frame");
     addDirectiveHandler<&ELFAsmParser::ParseDirectiveSection>(".section");


@@ -123,12 +121,6 @@ public:
                               ELF::SHF_WRITE,
                               SectionKind::getReadOnlyWithRel());
   }
                               ELF::SHF_WRITE,
                               SectionKind::getReadOnlyWithRel());
   }

-  bool ParseSectionDirectiveDataRelRoLocal(StringRef, SMLoc) {
-    return ParseSectionSwitch(".data.rel.ro.local", ELF::SHT_PROGBITS,
-                              ELF::SHF_ALLOC |
-                              ELF::SHF_WRITE,
-                              SectionKind::getReadOnlyWithRelLocal());
-  }

   bool ParseSectionDirectiveEhFrame(StringRef, SMLoc) {
     return ParseSectionSwitch(".eh_frame", ELF::SHT_PROGBITS,
                               ELF::SHF_ALLOC |
   bool ParseSectionDirectiveEhFrame(StringRef, SMLoc) {
     return ParseSectionSwitch(".eh_frame", ELF::SHT_PROGBITS,
                               ELF::SHF_ALLOC |

diff --git a/lib/Target/ARM/ARMConstantPoolValue.h b/lib/Target/ARM/ARMConstantPoolValue.h
index 21ad07d394c96c9eb4c6f69ff94036af03e0ddbb..6b18a4e528786b5ef97b88d075d868392f09f476 100644 (file)
--- a/lib/Target/ARM/ARMConstantPoolValue.h
+++ b/lib/Target/ARM/ARMConstantPoolValue.h
@@ -102,8 +102,6 @@ public:
   bool isLSDA() const { return Kind == ARMCP::CPLSDA; }
   bool isMachineBasicBlock() const{ return Kind == ARMCP::CPMachineBasicBlock; }
 
   bool isLSDA() const { return Kind == ARMCP::CPLSDA; }
   bool isMachineBasicBlock() const{ return Kind == ARMCP::CPMachineBasicBlock; }
 

-  unsigned getRelocationInfo() const override { return 2; }
-

   int getExistingMachineCPValue(MachineConstantPool *CP,
                                 unsigned Alignment) override;
 
   int getExistingMachineCPValue(MachineConstantPool *CP,
                                 unsigned Alignment) override;
 

diff --git a/lib/Target/PowerPC/PPCTargetObjectFile.cpp b/lib/Target/PowerPC/PPCTargetObjectFile.cpp
index 9ee5db938b67b5658a3c63a0c7ae8a71dc892395..798bb9d6b89207b5e38fdfd98584f7ec5f7e2609 100644 (file)
--- a/lib/Target/PowerPC/PPCTargetObjectFile.cpp
+++ b/lib/Target/PowerPC/PPCTargetObjectFile.cpp
@@ -42,9 +42,7 @@ MCSection *PPC64LinuxTargetObjectFile::SelectSectionForGlobal(
   if (Kind.isReadOnly()) {
     const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV);
 
   if (Kind.isReadOnly()) {
     const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV);
 

-    if (GVar && GVar->isConstant() &&
-        (GVar->getInitializer()->getRelocationInfo() ==
-         Constant::GlobalRelocations))
+    if (GVar && GVar->isConstant() && GVar->getInitializer()->needsRelocation())

       Kind = SectionKind::getReadOnlyWithRel();
   }
 
       Kind = SectionKind::getReadOnlyWithRel();
   }
 

diff --git a/lib/Target/SystemZ/SystemZConstantPoolValue.cpp b/lib/Target/SystemZ/SystemZConstantPoolValue.cpp
index 44ea1d25f08e3933bc002b9c050ccc0bec2c52bb..4a6beb67f1820f561fca14b11b1ca8251993b5f9 100644 (file)
--- a/lib/Target/SystemZ/SystemZConstantPoolValue.cpp
+++ b/lib/Target/SystemZ/SystemZConstantPoolValue.cpp
@@ -26,21 +26,6 @@ SystemZConstantPoolValue::Create(const GlobalValue *GV,
   return new SystemZConstantPoolValue(GV, Modifier);
 }
 
   return new SystemZConstantPoolValue(GV, Modifier);
 }
 

-unsigned SystemZConstantPoolValue::getRelocationInfo() const {
-  switch (Modifier) {
-  case SystemZCP::TLSGD:
-  case SystemZCP::TLSLDM:
-  case SystemZCP::DTPOFF:
-    // May require a dynamic relocation.
-    return 2;
-  case SystemZCP::NTPOFF:
-    // May require a relocation, but the relocations are always resolved
-    // by the static linker.
-    return 1;
-  }
-  llvm_unreachable("Unknown modifier");
-}
-

 int SystemZConstantPoolValue::
 getExistingMachineCPValue(MachineConstantPool *CP, unsigned Alignment) {
   unsigned AlignMask = Alignment - 1;
 int SystemZConstantPoolValue::
 getExistingMachineCPValue(MachineConstantPool *CP, unsigned Alignment) {
   unsigned AlignMask = Alignment - 1;

diff --git a/lib/Target/SystemZ/SystemZConstantPoolValue.h b/lib/Target/SystemZ/SystemZConstantPoolValue.h
index e5f1bb18581ba61e5bd12fd7113b43f9f00bee04..a71b595560d2f168d0cbffc651048dbe4ec04d85 100644 (file)
--- a/lib/Target/SystemZ/SystemZConstantPoolValue.h
+++ b/lib/Target/SystemZ/SystemZConstantPoolValue.h
@@ -43,7 +43,6 @@ public:
     Create(const GlobalValue *GV, SystemZCP::SystemZCPModifier Modifier);
 
   // Override MachineConstantPoolValue.
     Create(const GlobalValue *GV, SystemZCP::SystemZCPModifier Modifier);
 
   // Override MachineConstantPoolValue.

-  unsigned getRelocationInfo() const override;

   int getExistingMachineCPValue(MachineConstantPool *CP,
                                 unsigned Alignment) override;
   void addSelectionDAGCSEId(FoldingSetNodeID &ID) override;
   int getExistingMachineCPValue(MachineConstantPool *CP,
                                 unsigned Alignment) override;
   void addSelectionDAGCSEId(FoldingSetNodeID &ID) override;

diff --git a/lib/Target/TargetLoweringObjectFile.cpp b/lib/Target/TargetLoweringObjectFile.cpp
index dd65b881f4d42e4609ffce273c2457fa9c138412..5ccdae420245affa4114ff5a8aa995c992370af3 100644 (file)
--- a/lib/Target/TargetLoweringObjectFile.cpp
+++ b/lib/Target/TargetLoweringObjectFile.cpp
@@ -169,14 +169,13 @@ SectionKind TargetLoweringObjectFile::getKindForGlobal(const GlobalValue *GV,
     // If the initializer for the global contains something that requires a
     // relocation, then we may have to drop this into a writable data section
     // even though it is marked const.
     // If the initializer for the global contains something that requires a
     // relocation, then we may have to drop this into a writable data section
     // even though it is marked const.

-    switch (C->getRelocationInfo()) {
-    case Constant::NoRelocation:
+    if (!C->needsRelocation()) {

       // If the global is required to have a unique address, it can't be put
       // into a mergable section: just drop it into the general read-only
       // section instead.
       if (!GVar->hasUnnamedAddr())
         return SectionKind::getReadOnly();
       // If the global is required to have a unique address, it can't be put
       // into a mergable section: just drop it into the general read-only
       // section instead.
       if (!GVar->hasUnnamedAddr())
         return SectionKind::getReadOnly();

-        
+

       // If initializer is a null-terminated string, put it in a "cstring"
       // section of the right width.
       if (ArrayType *ATy = dyn_cast<ArrayType>(C->getType())) {
       // If initializer is a null-terminated string, put it in a "cstring"
       // section of the right width.
       if (ArrayType *ATy = dyn_cast<ArrayType>(C->getType())) {


@@ -207,20 +206,7 @@ SectionKind TargetLoweringObjectFile::getKindForGlobal(const GlobalValue *GV,
         return SectionKind::getReadOnly();
       }
 
         return SectionKind::getReadOnly();
       }
 

-    case Constant::LocalRelocation:
-      // In static relocation model, the linker will resolve all addresses, so
-      // the relocation entries will actually be constants by the time the app
-      // starts up.  However, we can't put this into a mergable section, because
-      // the linker doesn't take relocations into consideration when it tries to
-      // merge entries in the section.
-      if (ReloModel == Reloc::Static)
-        return SectionKind::getReadOnly();
-
-      // Otherwise, the dynamic linker needs to fix it up, put it in the
-      // writable data.rel.local section.
-      return SectionKind::getReadOnlyWithRelLocal();
-
-    case Constant::GlobalRelocations:
+    } else {

       // In static relocation model, the linker will resolve all addresses, so
       // the relocation entries will actually be constants by the time the app
       // starts up.  However, we can't put this into a mergable section, because
       // In static relocation model, the linker will resolve all addresses, so
       // the relocation entries will actually be constants by the time the app
       // starts up.  However, we can't put this into a mergable section, because


@@ -243,15 +229,9 @@ SectionKind TargetLoweringObjectFile::getKindForGlobal(const GlobalValue *GV,
   if (ReloModel == Reloc::Static)
     return SectionKind::getDataNoRel();
 
   if (ReloModel == Reloc::Static)
     return SectionKind::getDataNoRel();
 

-  switch (C->getRelocationInfo()) {
-  case Constant::NoRelocation:
-    return SectionKind::getDataNoRel();
-  case Constant::LocalRelocation:
-    return SectionKind::getDataRelLocal();
-  case Constant::GlobalRelocations:
+  if (C->needsRelocation())

     return SectionKind::getDataRel();
     return SectionKind::getDataRel();

-  }
-  llvm_unreachable("Invalid relocation");
+  return SectionKind::getDataNoRel();

 }
 
 /// This method computes the appropriate section to emit the specified global
 }
 
 /// This method computes the appropriate section to emit the specified global

diff --git a/test/CodeGen/AArch64/emutls_generic.ll b/test/CodeGen/AArch64/emutls_generic.ll
index d02bf72d80e4c115447db6e55924de16d6ddf313..b06c647d3415c8d92c74cd479137f458c8046e1c 100644 (file)
--- a/test/CodeGen/AArch64/emutls_generic.ll
+++ b/test/CodeGen/AArch64/emutls_generic.ll
@@ -47,7 +47,7 @@ entry:
 ; ARM_64:        .section .rodata,
 ; ARM_64-LABEL:  __emutls_t.external_y:
 ; ARM_64-NEXT:   .byte 7
 ; ARM_64:        .section .rodata,
 ; ARM_64-LABEL:  __emutls_t.external_y:
 ; ARM_64-NEXT:   .byte 7

-; ARM_64:        .section .data.rel.local
+; ARM_64:        .section .data.rel

 ; ARM_64:        .align 3
 ; ARM_64-LABEL:  __emutls_v.internal_y:
 ; ARM_64-NEXT:   .xword 8
 ; ARM_64:        .align 3
 ; ARM_64-LABEL:  __emutls_v.internal_y:
 ; ARM_64-NEXT:   .xword 8

diff --git a/test/CodeGen/ARM/emutls_generic.ll b/test/CodeGen/ARM/emutls_generic.ll
index 864daae568ff755e66e7bdc5e0b325d4407ccd6b..b6f745d8cb8091bcb1b357bf1792a8dedff01237 100644 (file)
--- a/test/CodeGen/ARM/emutls_generic.ll
+++ b/test/CodeGen/ARM/emutls_generic.ll
@@ -39,7 +39,7 @@ entry:
 ; ARM_32:      .long __emutls_v.internal_y
 ; ARM_32-NOT:   __emutls_t.external_x
 ; ARM_32-NOT:   __emutls_v.external_x:
 ; ARM_32:      .long __emutls_v.internal_y
 ; ARM_32-NOT:   __emutls_t.external_x
 ; ARM_32-NOT:   __emutls_v.external_x:

-; ARM_32:        .section .data.rel.local
+; ARM_32:        .section .data.rel

 ; ARM_32:        .align 2
 ; ARM_32-LABEL:  __emutls_v.external_y:
 ; ARM_32-NEXT:   .long 1
 ; ARM_32:        .align 2
 ; ARM_32-LABEL:  __emutls_v.external_y:
 ; ARM_32-NEXT:   .long 1


@@ -49,7 +49,7 @@ entry:
 ; ARM_32:        .section .rodata,
 ; ARM_32-LABEL:  __emutls_t.external_y:
 ; ARM_32-NEXT:   .byte 7
 ; ARM_32:        .section .rodata,
 ; ARM_32-LABEL:  __emutls_t.external_y:
 ; ARM_32-NEXT:   .byte 7

-; ARM_32:        .section .data.rel.local
+; ARM_32:        .section .data.rel

 ; ARM_32:        .align 2
 ; ARM_32-LABEL:  __emutls_v.internal_y:
 ; ARM_32-NEXT:   .long 8
 ; ARM_32:        .align 2
 ; ARM_32-LABEL:  __emutls_v.internal_y:
 ; ARM_32-NEXT:   .long 8

diff --git a/test/CodeGen/Mips/emutls_generic.ll b/test/CodeGen/Mips/emutls_generic.ll
index 84a84f3fd747fde3f97c6b06b5b1f1e67ebb0cec..6d0bb33b06b593ee34b73d7b909323a2855a200d 100644 (file)
--- a/test/CodeGen/Mips/emutls_generic.ll
+++ b/test/CodeGen/Mips/emutls_generic.ll
@@ -30,13 +30,13 @@ entry:
 ; MIPS_32:     lw {{.+}}call16(__emutls_get_address
 ; MIPS_32-NOT:  __emutls_t.external_x
 ; MIPS_32-NOT:  __emutls_v.external_x:
 ; MIPS_32:     lw {{.+}}call16(__emutls_get_address
 ; MIPS_32-NOT:  __emutls_t.external_x
 ; MIPS_32-NOT:  __emutls_v.external_x:

-; MIPS_32:       .section .data.rel.local
+; MIPS_32:       .section .data.rel

 ; MIPS_32:       .align 2
 ; MIPS_32-LABEL: __emutls_v.external_y:
 ; MIPS_32:       .section .rodata,
 ; MIPS_32-LABEL: __emutls_t.external_y:
 ; MIPS_32-NEXT:  .byte 7
 ; MIPS_32:       .align 2
 ; MIPS_32-LABEL: __emutls_v.external_y:
 ; MIPS_32:       .section .rodata,
 ; MIPS_32-LABEL: __emutls_t.external_y:
 ; MIPS_32-NEXT:  .byte 7

-; MIPS_32:       .section .data.rel.local
+; MIPS_32:       .section .data.rel

 ; MIPS_32:       .align 2
 ; MIPS_32-LABEL: __emutls_v.internal_y:
 ; MIPS_32-NEXT:  .4byte 8
 ; MIPS_32:       .align 2
 ; MIPS_32-LABEL: __emutls_v.internal_y:
 ; MIPS_32-NEXT:  .4byte 8


@@ -58,7 +58,7 @@ entry:
 ; MIPS_64:       .section .rodata,
 ; MIPS_64-LABEL: __emutls_t.external_y:
 ; MIPS_64-NEXT:  .byte 7
 ; MIPS_64:       .section .rodata,
 ; MIPS_64-LABEL: __emutls_t.external_y:
 ; MIPS_64-NEXT:  .byte 7

-; MIPS_64:       .section .data.rel.local
+; MIPS_64:       .section .data.rel

 ; MIPS_64:       .align 3
 ; MIPS_64-LABEL: __emutls_v.internal_y:
 ; MIPS_64-NEXT:  .8byte 8
 ; MIPS_64:       .align 3
 ; MIPS_64-LABEL: __emutls_v.internal_y:
 ; MIPS_64-NEXT:  .8byte 8

diff --git a/test/CodeGen/X86/emutls-pic.ll b/test/CodeGen/X86/emutls-pic.ll
index 7204c10f9b34b172e16d65cf50114ea9c46cb057..1c4d83728e692bcd69ca425bc52c7c57881b09be 100644 (file)
--- a/test/CodeGen/X86/emutls-pic.ll
+++ b/test/CodeGen/X86/emutls-pic.ll
@@ -103,7 +103,7 @@ entry:
 
 ;;;;; 32-bit targets
 
 
 ;;;;; 32-bit targets
 

-; X32:      .section .data.rel.local,
+; X32:      .section .data.rel,

 ; X32-LABEL: __emutls_v.i:
 ; X32-NEXT: .long 4
 ; X32-NEXT: .long 4
 ; X32-LABEL: __emutls_v.i:
 ; X32-NEXT: .long 4
 ; X32-NEXT: .long 4


@@ -114,7 +114,7 @@ entry:
 ; X32-LABEL: __emutls_t.i:
 ; X32-NEXT: .long 15
 
 ; X32-LABEL: __emutls_t.i:
 ; X32-NEXT: .long 15
 

-; X32:      .section .data.rel.local,
+; X32:      .section .data.rel,

 ; X32-LABEL: __emutls_v.j:
 ; X32-NEXT: .long 4
 ; X32-NEXT: .long 4
 ; X32-LABEL: __emutls_v.j:
 ; X32-NEXT: .long 4
 ; X32-NEXT: .long 4


@@ -136,7 +136,7 @@ entry:
 
 ;;;;; 64-bit targets
 
 
 ;;;;; 64-bit targets
 

-; X64:      .section .data.rel.local,
+; X64:      .section .data.rel,

 ; X64-LABEL: __emutls_v.i:
 ; X64-NEXT: .quad 4
 ; X64-NEXT: .quad 4
 ; X64-LABEL: __emutls_v.i:
 ; X64-NEXT: .quad 4
 ; X64-NEXT: .quad 4


@@ -147,7 +147,7 @@ entry:
 ; X64-LABEL: __emutls_t.i:
 ; X64-NEXT: .long 15
 
 ; X64-LABEL: __emutls_t.i:
 ; X64-NEXT: .long 15
 

-; X64:      .section .data.rel.local,
+; X64:      .section .data.rel,

 ; X64-LABEL: __emutls_v.j:
 ; X64-NEXT: .quad 4
 ; X64-NEXT: .quad 4
 ; X64-LABEL: __emutls_v.j:
 ; X64-NEXT: .quad 4
 ; X64-NEXT: .quad 4

diff --git a/test/CodeGen/X86/emutls-pie.ll b/test/CodeGen/X86/emutls-pie.ll
index 4cd3d22bce036e59cde9e699af26bf50d84b2bda..92a7b16887e77309c7f6cb3bc343bb4745bc32e7 100644 (file)
--- a/test/CodeGen/X86/emutls-pie.ll
+++ b/test/CodeGen/X86/emutls-pie.ll
@@ -100,7 +100,7 @@ entry:
 
 ;;;;; 32-bit targets
 
 
 ;;;;; 32-bit targets
 

-; X32:      .section .data.rel.local,
+; X32:      .section .data.rel,

 ; X32-LABEL: __emutls_v.i:
 ; X32-NEXT: .long 4
 ; X32-NEXT: .long 4
 ; X32-LABEL: __emutls_v.i:
 ; X32-NEXT: .long 4
 ; X32-NEXT: .long 4


@@ -116,7 +116,7 @@ entry:
 
 ;;;;; 64-bit targets
 
 
 ;;;;; 64-bit targets
 

-; X64:      .section .data.rel.local,
+; X64:      .section .data.rel,

 ; X64-LABEL: __emutls_v.i:
 ; X64-NEXT: .quad 4
 ; X64-NEXT: .quad 4
 ; X64-LABEL: __emutls_v.i:
 ; X64-NEXT: .quad 4
 ; X64-NEXT: .quad 4

diff --git a/test/CodeGen/X86/emutls_generic.ll b/test/CodeGen/X86/emutls_generic.ll
index c80c897744761beb1216a7c8b2c62acdd32561ac..480543dd43fbbe5fb2a8b31e9aaf10a8553a1534 100644 (file)
--- a/test/CodeGen/X86/emutls_generic.ll
+++ b/test/CodeGen/X86/emutls_generic.ll
@@ -55,7 +55,7 @@ entry:
 ; X86_32:      calll __emutls_get_address
 ; X86_32-NOT:   __emutls_t.external_x
 ; X86_32-NOT:   __emutls_v.external_x:
 ; X86_32:      calll __emutls_get_address
 ; X86_32-NOT:   __emutls_t.external_x
 ; X86_32-NOT:   __emutls_v.external_x:

-; X86_32:        .section .data.rel.local
+; X86_32:        .section .data.rel

 ; X86_32:        .align 4
 ; X86_32-LABEL:  __emutls_v.external_y:
 ; X86_32-NEXT:   .long 1
 ; X86_32:        .align 4
 ; X86_32-LABEL:  __emutls_v.external_y:
 ; X86_32-NEXT:   .long 1


@@ -65,7 +65,7 @@ entry:
 ; X86_32:        .section .rodata,
 ; X86_32-LABEL:  __emutls_t.external_y:
 ; X86_32-NEXT:   .byte 7
 ; X86_32:        .section .rodata,
 ; X86_32-LABEL:  __emutls_t.external_y:
 ; X86_32-NEXT:   .byte 7

-; X86_32:        .section .data.rel.local
+; X86_32:        .section .data.rel

 ; X86_32:        .align 4
 ; X86_32-LABEL:  __emutls_v.internal_y:
 ; X86_32-NEXT:   .long 8
 ; X86_32:        .align 4
 ; X86_32-LABEL:  __emutls_v.internal_y:
 ; X86_32-NEXT:   .long 8


@@ -95,7 +95,7 @@ entry:
 ; X86_64:        .section .rodata,
 ; X86_64-LABEL:  __emutls_t.external_y:
 ; X86_64-NEXT:   .byte 7
 ; X86_64:        .section .rodata,
 ; X86_64-LABEL:  __emutls_t.external_y:
 ; X86_64-NEXT:   .byte 7

-; X86_64:        .section .data.rel.local
+; X86_64:        .section .data.rel

 ; X86_64:        .align 8
 ; X86_64-LABEL:  __emutls_v.internal_y:
 ; X86_64-NEXT:   .quad 8
 ; X86_64:        .align 8
 ; X86_64-LABEL:  __emutls_v.internal_y:
 ; X86_64-NEXT:   .quad 8

diff --git a/test/CodeGen/X86/rodata-relocs.ll b/test/CodeGen/X86/rodata-relocs.ll
index 9228ea1f621f154baeacc17ddea35b6aac90c79f..7bd129b7fe953ca3ca38ef716b69a433ae52c3f0 100644 (file)
--- a/test/CodeGen/X86/rodata-relocs.ll
+++ b/test/CodeGen/X86/rodata-relocs.ll
@@ -32,15 +32,15 @@ target triple = "x86_64-unknown-linux-gnu"
 ; PIC: .section .rodata.cst16,"aM",@progbits,16
 ; PIC: e:
 ; PIC: e1:
 ; PIC: .section .rodata.cst16,"aM",@progbits,16
 ; PIC: e:
 ; PIC: e1:

-; PIC: .section .data.rel.ro.local,"aw",@progbits
+; PIC: .section .data.rel.ro,"aw",@progbits

 ; PIC: p:
 ; PIC: t:
 ; PIC: p:
 ; PIC: t:

-; PIC: .section .data.rel.ro,"aw",@progbits
+; PIC-NOT: .section

 ; PIC: p1:
 ; PIC: t1:
 ; PIC: .section .data.rel,"aw",@progbits
 ; PIC: p2:
 ; PIC: t2:
 ; PIC: p1:
 ; PIC: t1:
 ; PIC: .section .data.rel,"aw",@progbits
 ; PIC: p2:
 ; PIC: t2:

-; PIC: .section .data.rel.local,"aw",@progbits
+; PIC-NOT: .section

 ; PIC: p3:
 ; PIC: t3:
 ; PIC: p3:
 ; PIC: t3: