Enable loop splitting in RegAllocGreedy.

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

diff --git a/lib/CodeGen/TargetLoweringObjectFileImpl.cpp b/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
index f1e10eec724c66e1a28a068c951aadb6ae3e2970..abc01a28776f26124458dc0544b3f3ea9dd33b62 100644 (file)
--- a/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
+++ b/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
@@ -33,6 +33,7 @@
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/Triple.h"
 using namespace llvm;
 using namespace dwarf;
 
@@ -134,7 +135,7 @@ void TargetLoweringObjectFileELF::Initialize(MCContext &Ctx,
                                SectionKind::getReadOnly());
   EHFrameSection =
     getContext().getELFSection(".eh_frame", MCSectionELF::SHT_PROGBITS,
-                               MCSectionELF::SHF_ALLOC |MCSectionELF::SHF_WRITE,
+                               MCSectionELF::SHF_ALLOC,
                                SectionKind::getDataRel());
 
   // Debug Info Sections.
@@ -261,7 +262,7 @@ getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
 
   return getContext().getELFSection(SectionName,
                                     getELFSectionType(SectionName, Kind),
-                                    getELFSectionFlags(Kind), Kind, true);
+                                    getELFSectionFlags(Kind), Kind);
 }
 
 static const char *getSectionPrefixForUniqueGlobal(SectionKind Kind) {
@@ -307,7 +308,7 @@ SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
   bool EmitUniquedSection;
   if (Kind.isText())
     EmitUniquedSection = TM.getFunctionSections();
-  else 
+  else
     EmitUniquedSection = TM.getDataSections();
 
   // If this global is linkonce/weak and the target handles this by emitting it
@@ -450,7 +451,20 @@ void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
   IsFunctionEHSymbolGlobal = true;
   IsFunctionEHFrameSymbolPrivate = false;
   SupportsWeakOmittedEHFrame = false;
-  
+
+  Triple T(((LLVMTargetMachine&)TM).getTargetTriple());
+  if (T.getOS() == Triple::Darwin) {
+    switch (T.getDarwinMajorNumber()) {
+    case 7:  // 10.3 Panther.
+    case 8:  // 10.4 Tiger.
+      CommDirectiveSupportsAlignment = false;
+      break;
+    case 9:   // 10.5 Leopard.
+    case 10:  // 10.6 SnowLeopard.
+      break;
+    }
+  }
+
   TargetLoweringObjectFile::Initialize(Ctx, TM);
 
   TextSection // .text
@@ -469,20 +483,20 @@ void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
     = getContext().getMachOSection("__DATA", "__thread_bss",
                                    MCSectionMachO::S_THREAD_LOCAL_ZEROFILL,
                                    SectionKind::getThreadBSS());
-                                   
+
   // TODO: Verify datarel below.
   TLSTLVSection // .tlv
     = getContext().getMachOSection("__DATA", "__thread_vars",
                                    MCSectionMachO::S_THREAD_LOCAL_VARIABLES,
                                    SectionKind::getDataRel());
-                                   
+
   TLSThreadInitSection
     = getContext().getMachOSection("__DATA", "__thread_init",
                           MCSectionMachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS,
                           SectionKind::getDataRel());
-                                   
+
   CStringSection // .cstring
-    = getContext().getMachOSection("__TEXT", "__cstring", 
+    = getContext().getMachOSection("__TEXT", "__cstring",
                                    MCSectionMachO::S_CSTRING_LITERALS,
                                    SectionKind::getMergeable1ByteCString());
   UStringSection
@@ -493,7 +507,7 @@ void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
                                    MCSectionMachO::S_4BYTE_LITERALS,
                                    SectionKind::getMergeableConst4());
   EightByteConstantSection // .literal8
-    = getContext().getMachOSection("__TEXT", "__literal8", 
+    = getContext().getMachOSection("__TEXT", "__literal8",
                                    MCSectionMachO::S_8BYTE_LITERALS,
                                    SectionKind::getMergeableConst8());
 
@@ -517,14 +531,14 @@ void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
                                    MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
                                    SectionKind::getText());
   ConstTextCoalSection
-    = getContext().getMachOSection("__TEXT", "__const_coal", 
+    = getContext().getMachOSection("__TEXT", "__const_coal",
                                    MCSectionMachO::S_COALESCED,
                                    SectionKind::getReadOnly());
   ConstDataSection  // .const_data
     = getContext().getMachOSection("__DATA", "__const", 0,
                                    SectionKind::getReadOnlyWithRel());
   DataCoalSection
-    = getContext().getMachOSection("__DATA","__datacoal_nt", 
+    = getContext().getMachOSection("__DATA","__datacoal_nt",
                                    MCSectionMachO::S_COALESCED,
                                    SectionKind::getDataRel());
   DataCommonSection
@@ -534,7 +548,7 @@ void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
   DataBSSSection
     = getContext().getMachOSection("__DATA","__bss", MCSectionMachO::S_ZEROFILL,
                                    SectionKind::getBSS());
-  
+
 
   LazySymbolPointerSection
     = getContext().getMachOSection("__DATA", "__la_symbol_ptr",
@@ -576,7 +590,7 @@ void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
 
   // Debug Information.
   DwarfAbbrevSection =
-    getContext().getMachOSection("__DWARF", "__debug_abbrev", 
+    getContext().getMachOSection("__DWARF", "__debug_abbrev",
                                  MCSectionMachO::S_ATTR_DEBUG,
                                  SectionKind::getMetadata());
   DwarfInfoSection =
@@ -623,7 +637,7 @@ void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
     getContext().getMachOSection("__DWARF", "__debug_inlined",
                                  MCSectionMachO::S_ATTR_DEBUG,
                                  SectionKind::getMetadata());
-                                 
+
   TLSExtraDataSection = TLSTLVSection;
 }
 
@@ -665,7 +679,7 @@ getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
 const MCSection *TargetLoweringObjectFileMachO::
 SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
                        Mangler *Mang, const TargetMachine &TM) const {
-  
+
   // Handle thread local data.
   if (Kind.isThreadBSS()) return TLSBSSSection;
   if (Kind.isThreadData()) return TLSDataSection;
@@ -685,7 +699,7 @@ SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
   if (Kind.isMergeable1ByteCString() &&
       TM.getTargetData()->getPreferredAlignment(cast<GlobalVariable>(GV)) < 32)
     return CStringSection;
-      
+
   // Do not put 16-bit arrays in the UString section if they have an
   // externally visible label, this runs into issues with certain linker
   // versions.
@@ -721,7 +735,7 @@ SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
   // with the .zerofill directive (aka .lcomm).
   if (Kind.isBSSLocal())
     return DataBSSSection;
-  
+
   // Otherwise, just drop the variable in the normal data section.
   return DataSection;
 }
@@ -938,6 +952,7 @@ getCOFFSectionFlags(SectionKind K) {
   else if (K.isText())
     Flags |=
       COFF::IMAGE_SCN_MEM_EXECUTE |
+      COFF::IMAGE_SCN_MEM_READ |
       COFF::IMAGE_SCN_CNT_CODE;
   else if (K.isBSS ())
     Flags |=
@@ -967,12 +982,12 @@ getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
 
 static const char *getCOFFSectionPrefixForUniqueGlobal(SectionKind Kind) {
   if (Kind.isText())
-    return ".text$linkonce";
+    return ".text$";
   if (Kind.isBSS ())
-    return ".bss$linkonce";
+    return ".bss$";
   if (Kind.isWriteable())
-    return ".data$linkonce";
-  return ".rdata$linkonce";
+    return ".data$";
+  return ".rdata$";
 }
 
 
@@ -987,14 +1002,14 @@ SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
     const char *Prefix = getCOFFSectionPrefixForUniqueGlobal(Kind);
     SmallString<128> Name(Prefix, Prefix+strlen(Prefix));
     MCSymbol *Sym = Mang->getSymbol(GV);
-    Name.append(Sym->getName().begin(), Sym->getName().end());
+    Name.append(Sym->getName().begin() + 1, Sym->getName().end());
 
     unsigned Characteristics = getCOFFSectionFlags(Kind);
 
     Characteristics |= COFF::IMAGE_SCN_LNK_COMDAT;
 
     return getContext().getCOFFSection(Name.str(), Characteristics,
-                          COFF::IMAGE_COMDAT_SELECT_EXACT_MATCH, Kind);
+                          COFF::IMAGE_COMDAT_SELECT_ANY, Kind);
   }
 
   if (Kind.isText())