move elf section uniquing to MCContext. Along the way

merge XCore's section into MCSectionELF


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100812 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 26 insertions, 2 deletions

diff --git a/lib/MC/MCContext.cpp b/lib/MC/MCContext.cpp
index 6a6841a48d..dc757bb0bf 100644
--- a/lib/MC/MCContext.cpp
+++ b/lib/MC/MCContext.cpp
@@ -10,16 +10,19 @@
 #include "llvm/MC/MCContext.h"
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCSectionMachO.h"
+#include "llvm/MC/MCSectionELF.h"
 #include "llvm/MC/MCSymbol.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/Twine.h"
 using namespace llvm;
 
 typedef StringMap<const MCSectionMachO*> MachOUniqueMapTy;
+typedef StringMap<const MCSectionELF*> ELFUniqueMapTy;
 
 
 MCContext::MCContext(const MCAsmInfo &mai) : MAI(mai), NextUniqueID(0) {
   MachOUniquingMap = 0;
+  ELFUniquingMap = 0;
 }
 
 MCContext::~MCContext() {
@@ -28,6 +31,7 @@ MCContext::~MCContext() {
   
   // If we have the MachO uniquing map, free it.
   delete (MachOUniqueMapTy*)MachOUniquingMap;
+  delete (ELFUniqueMapTy*)ELFUniquingMap;
 }
 
 //===----------------------------------------------------------------------===//
@@ -96,6 +100,26 @@ getMachOSection(StringRef Segment, StringRef Section,
   if (Entry) return Entry;
   
   // Otherwise, return a new section.
-  return Entry = MCSectionMachO::Create(Segment, Section, TypeAndAttributes,
-                                        Reserved2, Kind, *this);
+  return Entry = new (*this) MCSectionMachO(Segment, Section, TypeAndAttributes,
+                                            Reserved2, Kind);
 }
+
+
+const MCSection *MCContext::
+getELFSection(StringRef Section, unsigned Type, unsigned Flags,
+              SectionKind Kind, bool IsExplicit) {
+  if (ELFUniquingMap == 0)
+    ELFUniquingMap = new ELFUniqueMapTy();
+  ELFUniqueMapTy &Map = *(ELFUniqueMapTy*)ELFUniquingMap;
+  
+  // Do the lookup, if we have a hit, return it.
+  StringMapEntry<const MCSectionELF*> &Entry = Map.GetOrCreateValue(Section);
+  if (Entry.getValue()) return Entry.getValue();
+  
+  MCSectionELF *Result = new (*this) MCSectionELF(Entry.getKey(), Type, Flags,
+                                                  Kind, IsExplicit);
+  Entry.setValue(Result);
+  return Result;
+}
+
+