X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FTargetLoweringObjectFile.cpp;h=856d92dcede47dd769fbeb119caeba380b99c59f;hb=a4b41272897aebd7360d431179703403c832c8d3;hp=c098035a5aa4b4edf0eec9f99f0ef1e9779bf650;hpb=8eeedf74d346d6797236544847ebaa45e14d7703;p=oota-llvm.git

diff --git a/lib/Target/TargetLoweringObjectFile.cpp b/lib/Target/TargetLoweringObjectFile.cpp
index c098035a5aa..856d92dcede 100644
--- a/lib/Target/TargetLoweringObjectFile.cpp
+++ b/lib/Target/TargetLoweringObjectFile.cpp
@@ -43,9 +43,8 @@ using namespace llvm;
 void TargetLoweringObjectFile::Initialize(MCContext &ctx,
                                           const TargetMachine &TM) {
   Ctx = &ctx;
-  DL = TM.getDataLayout();
-  InitMCObjectFileInfo(TM.getTargetTriple(),
-                       TM.getRelocationModel(), TM.getCodeModel(), *Ctx);
+  InitMCObjectFileInfo(TM.getTargetTriple(), TM.getRelocationModel(),
+                       TM.getCodeModel(), *Ctx);
 }
 
 TargetLoweringObjectFile::~TargetLoweringObjectFile() {
@@ -107,10 +106,10 @@ MCSymbol *TargetLoweringObjectFile::getSymbolWithGlobalValueBase(
   assert(!Suffix.empty());
 
   SmallString<60> NameStr;
-  NameStr += DL->getPrivateGlobalPrefix();
+  NameStr += GV->getParent()->getDataLayout().getPrivateGlobalPrefix();
   TM.getNameWithPrefix(NameStr, GV, Mang);
   NameStr.append(Suffix.begin(), Suffix.end());
-  return Ctx->GetOrCreateSymbol(NameStr.str());
+  return Ctx->getOrCreateSymbol(NameStr);
 }
 
 MCSymbol *TargetLoweringObjectFile::getCFIPersonalitySymbol(
@@ -120,7 +119,7 @@ MCSymbol *TargetLoweringObjectFile::getCFIPersonalitySymbol(
 }
 
 void TargetLoweringObjectFile::emitPersonalityValue(MCStreamer &Streamer,
-                                                    const TargetMachine &TM,
+                                                    const DataLayout &,
                                                     const MCSymbol *Sym) const {
 }
 
@@ -200,7 +199,7 @@ SectionKind TargetLoweringObjectFile::getKindForGlobal(const GlobalValue *GV,
       // Otherwise, just drop it into a mergable constant section.  If we have
       // a section for this size, use it, otherwise use the arbitrary sized
       // mergable section.
-      switch (TM.getDataLayout()->getTypeAllocSize(C->getType())) {
+      switch (GV->getParent()->getDataLayout().getTypeAllocSize(C->getType())) {
       case 4:  return SectionKind::getMergeableConst4();
       case 8:  return SectionKind::getMergeableConst8();
       case 16: return SectionKind::getMergeableConst16();
@@ -255,12 +254,13 @@ SectionKind TargetLoweringObjectFile::getKindForGlobal(const GlobalValue *GV,
   llvm_unreachable("Invalid relocation");
 }
 
-/// SectionForGlobal - This method computes the appropriate section to emit
-/// the specified global variable or function definition.  This should not
-/// be passed external (or available externally) globals.
-const MCSection *TargetLoweringObjectFile::
-SectionForGlobal(const GlobalValue *GV, SectionKind Kind, Mangler &Mang,
-                 const TargetMachine &TM) const {
+/// This method computes the appropriate section to emit the specified global
+/// variable or function definition.  This should not be passed external (or
+/// available externally) globals.
+MCSection *
+TargetLoweringObjectFile::SectionForGlobal(const GlobalValue *GV,
+                                           SectionKind Kind, Mangler &Mang,
+                                           const TargetMachine &TM) const {
   // Select section name.
   if (GV->hasSection())
     return getExplicitSectionGlobal(GV, Kind, Mang, TM);
@@ -270,17 +270,34 @@ SectionForGlobal(const GlobalValue *GV, SectionKind Kind, Mangler &Mang,
   return SelectSectionForGlobal(GV, Kind, Mang, TM);
 }
 
-const MCSection *TargetLoweringObjectFile::getSectionForJumpTable(
+MCSection *TargetLoweringObjectFile::getSectionForJumpTable(
     const Function &F, Mangler &Mang, const TargetMachine &TM) const {
-  return getSectionForConstant(SectionKind::getReadOnly(), /*C=*/nullptr);
+  return getSectionForConstant(F.getParent()->getDataLayout(),
+                               SectionKind::getReadOnly(), /*C=*/nullptr);
 }
 
-/// getSectionForConstant - Given a mergable constant with the
-/// specified size and relocation information, return a section that it
-/// should be placed in.
-const MCSection *
-TargetLoweringObjectFile::getSectionForConstant(SectionKind Kind,
-                                                const Constant *C) const {
+bool TargetLoweringObjectFile::shouldPutJumpTableInFunctionSection(
+    bool UsesLabelDifference, const Function &F) const {
+  // In PIC mode, we need to emit the jump table to the same section as the
+  // function body itself, otherwise the label differences won't make sense.
+  // FIXME: Need a better predicate for this: what about custom entries?
+  if (UsesLabelDifference)
+    return true;
+
+  // We should also do if the section name is NULL or function is declared
+  // in discardable section
+  // FIXME: this isn't the right predicate, should be based on the MCSection
+  // for the function.
+  if (F.isWeakForLinker())
+    return true;
+
+  return false;
+}
+
+/// Given a mergable constant with the specified size and relocation
+/// information, return a section that it should be placed in.
+MCSection *TargetLoweringObjectFile::getSectionForConstant(
+    const DataLayout &DL, SectionKind Kind, const Constant *C) const {
   if (Kind.isReadOnly() && ReadOnlySection != nullptr)
     return ReadOnlySection;
 
@@ -295,7 +312,7 @@ const MCExpr *TargetLoweringObjectFile::getTTypeGlobalReference(
     const TargetMachine &TM, MachineModuleInfo *MMI,
     MCStreamer &Streamer) const {
   const MCSymbolRefExpr *Ref =
-      MCSymbolRefExpr::Create(TM.getSymbol(GV, Mang), getContext());
+      MCSymbolRefExpr::create(TM.getSymbol(GV, Mang), getContext());
 
   return getTTypeReference(Ref, Encoding, Streamer);
 }
@@ -312,10 +329,10 @@ getTTypeReference(const MCSymbolRefExpr *Sym, unsigned Encoding,
   case dwarf::DW_EH_PE_pcrel: {
     // Emit a label to the streamer for the current position.  This gives us
     // .-foo addressing.
-    MCSymbol *PCSym = getContext().CreateTempSymbol();
+    MCSymbol *PCSym = getContext().createTempSymbol();
     Streamer.EmitLabel(PCSym);
-    const MCExpr *PC = MCSymbolRefExpr::Create(PCSym, getContext());
-    return MCBinaryExpr::CreateSub(Sym, PC, getContext());
+    const MCExpr *PC = MCSymbolRefExpr::create(PCSym, getContext());
+    return MCBinaryExpr::createSub(Sym, PC, getContext());
   }
   }
 }
@@ -323,5 +340,11 @@ getTTypeReference(const MCSymbolRefExpr *Sym, unsigned Encoding,
 const MCExpr *TargetLoweringObjectFile::getDebugThreadLocalSymbol(const MCSymbol *Sym) const {
   // FIXME: It's not clear what, if any, default this should have - perhaps a
   // null return could mean 'no location' & we should just do that here.
-  return MCSymbolRefExpr::Create(Sym, *Ctx);
+  return MCSymbolRefExpr::create(Sym, *Ctx);
+}
+
+void TargetLoweringObjectFile::getNameWithPrefix(
+    SmallVectorImpl<char> &OutName, const GlobalValue *GV,
+    bool CannotUsePrivateLabel, Mangler &Mang, const TargetMachine &TM) const {
+  Mang.getNameWithPrefix(OutName, GV, CannotUsePrivateLabel);
 }