1 files changed, 176 insertions, 0 deletions
diff --git a/contrib/llvm/lib/MC/MCContext.cpp b/contrib/llvm/lib/MC/MCContext.cpp
new file mode 100644
index 0000000..53ffc94
--- /dev/null
+++ b/contrib/llvm/lib/MC/MCContext.cpp
@@ -0,0 +1,176 @@
+//===- lib/MC/MCContext.cpp - Machine Code Context ------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCSectionMachO.h"
+#include "llvm/MC/MCSectionELF.h"
+#include "llvm/MC/MCSectionCOFF.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MCLabel.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/Twine.h"
+using namespace llvm;
+
+typedef StringMap<const MCSectionMachO*> MachOUniqueMapTy;
+typedef StringMap<const MCSectionELF*> ELFUniqueMapTy;
+typedef StringMap<const MCSectionCOFF*> COFFUniqueMapTy;
+
+
+MCContext::MCContext(const MCAsmInfo &mai) : MAI(mai), NextUniqueID(0) {
+  MachOUniquingMap = 0;
+  ELFUniquingMap = 0;
+  COFFUniquingMap = 0;
+}
+
+MCContext::~MCContext() {
+  // NOTE: The symbols are all allocated out of a bump pointer allocator,
+  // we don't need to free them here.
+  
+  // If we have the MachO uniquing map, free it.
+  delete (MachOUniqueMapTy*)MachOUniquingMap;
+  delete (ELFUniqueMapTy*)ELFUniquingMap;
+  delete (COFFUniqueMapTy*)COFFUniquingMap;
+}
+
+//===----------------------------------------------------------------------===//
+// Symbol Manipulation
+//===----------------------------------------------------------------------===//
+
+MCSymbol *MCContext::GetOrCreateSymbol(StringRef Name) {
+  assert(!Name.empty() && "Normal symbols cannot be unnamed!");
+  
+  // Determine whether this is an assembler temporary or normal label.
+  bool isTemporary = Name.startswith(MAI.getPrivateGlobalPrefix());
+  
+  // Do the lookup and get the entire StringMapEntry.  We want access to the
+  // key if we are creating the entry.
+  StringMapEntry<MCSymbol*> &Entry = Symbols.GetOrCreateValue(Name);
+  if (Entry.getValue()) return Entry.getValue();
+
+  // Ok, the entry doesn't already exist.  Have the MCSymbol object itself refer
+  // to the copy of the string that is embedded in the StringMapEntry.
+  MCSymbol *Result = new (*this) MCSymbol(Entry.getKey(), isTemporary);
+  Entry.setValue(Result);
+  return Result; 
+}
+
+MCSymbol *MCContext::GetOrCreateSymbol(const Twine &Name) {
+  SmallString<128> NameSV;
+  Name.toVector(NameSV);
+  return GetOrCreateSymbol(NameSV.str());
+}
+
+MCSymbol *MCContext::CreateTempSymbol() {
+  return GetOrCreateSymbol(Twine(MAI.getPrivateGlobalPrefix()) +
+                           "tmp" + Twine(NextUniqueID++));
+}
+
+unsigned MCContext::NextInstance(int64_t LocalLabelVal) {
+  MCLabel *&Label = Instances[LocalLabelVal];
+  if (!Label)
+    Label = new (*this) MCLabel(0);
+  return Label->incInstance();
+}
+
+unsigned MCContext::GetInstance(int64_t LocalLabelVal) {
+  MCLabel *&Label = Instances[LocalLabelVal];
+  if (!Label)
+    Label = new (*this) MCLabel(0);
+  return Label->getInstance();
+}
+
+MCSymbol *MCContext::CreateDirectionalLocalSymbol(int64_t LocalLabelVal) {
+  return GetOrCreateSymbol(Twine(MAI.getPrivateGlobalPrefix()) +
+                           Twine(LocalLabelVal) +
+                           "\2" +
+			   Twine(NextInstance(LocalLabelVal)));
+}
+MCSymbol *MCContext::GetDirectionalLocalSymbol(int64_t LocalLabelVal,
+                                               int bORf) {
+  return GetOrCreateSymbol(Twine(MAI.getPrivateGlobalPrefix()) +
+                           Twine(LocalLabelVal) +
+                           "\2" +
+			   Twine(GetInstance(LocalLabelVal) + bORf));
+}
+
+MCSymbol *MCContext::LookupSymbol(StringRef Name) const {
+  return Symbols.lookup(Name);
+}
+
+//===----------------------------------------------------------------------===//
+// Section Management
+//===----------------------------------------------------------------------===//
+
+const MCSectionMachO *MCContext::
+getMachOSection(StringRef Segment, StringRef Section,
+                unsigned TypeAndAttributes,
+                unsigned Reserved2, SectionKind Kind) {
+  
+  // We unique sections by their segment/section pair.  The returned section
+  // may not have the same flags as the requested section, if so this should be
+  // diagnosed by the client as an error.
+  
+  // Create the map if it doesn't already exist.
+  if (MachOUniquingMap == 0)
+    MachOUniquingMap = new MachOUniqueMapTy();
+  MachOUniqueMapTy &Map = *(MachOUniqueMapTy*)MachOUniquingMap;
+  
+  // Form the name to look up.
+  SmallString<64> Name;
+  Name += Segment;
+  Name.push_back(',');
+  Name += Section;
+  
+  // Do the lookup, if we have a hit, return it.
+  const MCSectionMachO *&Entry = Map[Name.str()];
+  if (Entry) return Entry;
+  
+  // Otherwise, return a new section.
+  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;
+}
+
+const MCSection *MCContext::getCOFFSection(StringRef Section,
+                                           unsigned Characteristics,
+                                           int Selection,
+                                           SectionKind Kind) {
+  if (COFFUniquingMap == 0)
+    COFFUniquingMap = new COFFUniqueMapTy();
+  COFFUniqueMapTy &Map = *(COFFUniqueMapTy*)COFFUniquingMap;
+  
+  // Do the lookup, if we have a hit, return it.
+  StringMapEntry<const MCSectionCOFF*> &Entry = Map.GetOrCreateValue(Section);
+  if (Entry.getValue()) return Entry.getValue();
+  
+  MCSectionCOFF *Result = new (*this) MCSectionCOFF(Entry.getKey(),
+                                                    Characteristics,
+                                                    Selection, Kind);
+  
+  Entry.setValue(Result);
+  return Result;
+}