Move most of the pre BB code to TailDuplicateAndUpdate. Change the

[oota-llvm.git] / lib / CodeGen / TargetLoweringObjectFileImpl.cpp

diff --git a/lib/CodeGen/TargetLoweringObjectFileImpl.cpp b/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
index aff33aa9d5107418024b3672b0853b5fbe635e52..f2eb5cf0f57feb210c239926eb9619a609f30dac 100644 (file)
--- a/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
+++ b/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
@@ -189,8 +189,8 @@ TargetLoweringObjectFileELF::getCFIPersonalitySymbol(const GlobalValue *GV,
     return  Mang->getSymbol(GV);
     break;
   case dwarf::DW_EH_PE_pcrel: {
-    Twine FullName = StringRef("DW.ref.") + Mang->getSymbol(GV)->getName();
-    return getContext().GetOrCreateSymbol(FullName);
+    return getContext().GetOrCreateSymbol(StringRef("DW.ref.") +
+                                          Mang->getSymbol(GV)->getName());
     break;
   }
   }
@@ -199,13 +199,13 @@ TargetLoweringObjectFileELF::getCFIPersonalitySymbol(const GlobalValue *GV,
 void TargetLoweringObjectFileELF::emitPersonalityValue(MCStreamer &Streamer,
                                                        const TargetMachine &TM,
                                                        const MCSymbol *Sym) const {
-  Twine FullName = StringRef("DW.ref.") + Sym->getName();
-  MCSymbol *Label = getContext().GetOrCreateSymbol(FullName);
+  SmallString<64> NameData("DW.ref.");
+  NameData += Sym->getName();
+  MCSymbol *Label = getContext().GetOrCreateSymbol(NameData);
   Streamer.EmitSymbolAttribute(Label, MCSA_Hidden);
   Streamer.EmitSymbolAttribute(Label, MCSA_Weak);
-  Twine SectionName = StringRef(".data.") + Label->getName();
-  SmallString<64> NameData;
-  SectionName.toVector(NameData);
+  StringRef Prefix = ".data.";
+  NameData.insert(NameData.begin(), Prefix.begin(), Prefix.end());
   unsigned Flags = ELF::SHF_ALLOC | ELF::SHF_WRITE | ELF::SHF_GROUP;
   const MCSection *Sec = getContext().getELFSection(NameData,
                                                     ELF::SHT_PROGBITS,
@@ -225,10 +225,11 @@ void TargetLoweringObjectFileELF::emitPersonalityValue(MCStreamer &Streamer,
 
 static SectionKind
 getELFKindForNamedSection(StringRef Name, SectionKind K) {
-  // FIXME: Why is this here? Codegen is should not be in the business
-  // of figuring section flags. If the user wrote section(".eh_frame"),
-  // we should just pass that to MC which will defer to the assembly
-  // or use its default if producing an object file.
+  // N.B.: The defaults used in here are no the same ones used in MC.
+  // We follow gcc, MC follows gas. For example, given ".section .eh_frame",
+  // both gas and MC will produce a section with no flags. Given
+  // section(".eh_frame") gcc will produce
+  // .section  .eh_frame,"a",@progbits
   if (Name.empty() || Name[0] != '.') return K;
 
   // Some lame default implementation based on some magic section names.
@@ -254,9 +255,6 @@ getELFKindForNamedSection(StringRef Name, SectionKind K) {
       Name.startswith(".llvm.linkonce.tb."))
     return SectionKind::getThreadBSS();
 
-  if (Name == ".eh_frame")
-    return SectionKind::getDataRel();
-
   return K;
 }
 
@@ -484,11 +482,6 @@ getExprForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
 
 void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
                                                const TargetMachine &TM) {
-  // _foo.eh symbols are currently always exported so that the linker knows
-  // about them.  This is not necessary on 10.6 and later, but it
-  // doesn't hurt anything.
-  // FIXME: I need to get this from Triple.
-  IsFunctionEHSymbolGlobal = true;
   IsFunctionEHFrameSymbolPrivate = false;
   SupportsWeakOmittedEHFrame = false;
 
@@ -612,6 +605,13 @@ void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
   // Exception Handling.
   LSDASection = getContext().getMachOSection("__TEXT", "__gcc_except_tab", 0,
                                              SectionKind::getReadOnlyWithRel());
+
+  if (T.isMacOSX() && !T.isMacOSXVersionLT(10, 6))
+    CompactUnwindSection =
+      getContext().getMachOSection("__LD", "__compact_unwind",
+                                   MCSectionMachO::S_ATTR_DEBUG,
+                                   SectionKind::getReadOnly());
+
   // Debug Information.
   DwarfAbbrevSection =
     getContext().getMachOSection("__DWARF", "__debug_abbrev",
@@ -879,7 +879,7 @@ unsigned TargetLoweringObjectFileMachO::getLSDAEncoding() const {
   return DW_EH_PE_pcrel;
 }
 
-unsigned TargetLoweringObjectFileMachO::getFDEEncoding() const {
+unsigned TargetLoweringObjectFileMachO::getFDEEncoding(bool CFI) const {
   return DW_EH_PE_pcrel;
 }
 
@@ -994,6 +994,20 @@ void TargetLoweringObjectFileCOFF::Initialize(MCContext &Ctx,
     getContext().getCOFFSection(".drectve",
                                 COFF::IMAGE_SCN_LNK_INFO,
                                 SectionKind::getMetadata());
+
+  PDataSection =
+    getContext().getCOFFSection(".pdata",
+                                COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+                                COFF::IMAGE_SCN_MEM_READ |
+                                COFF::IMAGE_SCN_MEM_WRITE,
+                                SectionKind::getDataRel());
+
+  XDataSection =
+    getContext().getCOFFSection(".xdata",
+                                COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+                                COFF::IMAGE_SCN_MEM_READ |
+                                COFF::IMAGE_SCN_MEM_WRITE,
+                                SectionKind::getDataRel());
 }
 
 const MCSection *TargetLoweringObjectFileCOFF::getEHFrameSection() const {
@@ -1004,6 +1018,28 @@ const MCSection *TargetLoweringObjectFileCOFF::getEHFrameSection() const {
                                      SectionKind::getDataRel());
 }
 
+const MCSection *TargetLoweringObjectFileCOFF::getWin64EHFuncTableSection(
+                                                       StringRef suffix) const {
+  if (suffix == "")
+    return PDataSection;
+  return getContext().getCOFFSection((".pdata"+suffix).str(),
+                                     COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+                                     COFF::IMAGE_SCN_MEM_READ |
+                                     COFF::IMAGE_SCN_MEM_WRITE,
+                                     SectionKind::getDataRel());
+}
+
+const MCSection *TargetLoweringObjectFileCOFF::getWin64EHTableSection(
+                                                       StringRef suffix) const {
+  if (suffix == "")
+    return XDataSection;
+  return getContext().getCOFFSection((".xdata"+suffix).str(),
+                                     COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+                                     COFF::IMAGE_SCN_MEM_READ |
+                                     COFF::IMAGE_SCN_MEM_WRITE,
+                                     SectionKind::getDataRel());
+}
+
 
 static unsigned
 getCOFFSectionFlags(SectionKind K) {