Revert previous patch while I debug the darwin bootstrap failure.

llvm-svn: 120246

1 files changed, 23 insertions, 0 deletions

diff --git a/llvm/lib/MC/WinCOFFStreamer.cpp b/llvm/lib/MC/WinCOFFStreamer.cpp
index 1754ed30957..cba71882676 100644
--- a/llvm/lib/MC/WinCOFFStreamer.cpp
+++ b/llvm/lib/MC/WinCOFFStreamer.cpp
@@ -49,6 +49,7 @@ public:
   // MCStreamer interface
 
   virtual void InitSections();
+  virtual void EmitLabel(MCSymbol *Symbol);
   virtual void EmitAssemblerFlag(MCAssemblerFlag Flag);
   virtual void EmitThumbFunc(MCSymbol *Func);
   virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value);
@@ -174,6 +175,28 @@ void WinCOFFStreamer::InitSections() {
   SetSectionText();
 }
 
+void WinCOFFStreamer::EmitLabel(MCSymbol *Symbol) {
+  // TODO: This is copied almost exactly from the MachOStreamer. Consider
+  // merging into MCObjectStreamer?
+  assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
+  assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
+  assert(CurSection && "Cannot emit before setting section!");
+
+  Symbol->setSection(*CurSection);
+
+  MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
+
+  // FIXME: This is wasteful, we don't necessarily need to create a data
+  // fragment. Instead, we should mark the symbol as pointing into the data
+  // fragment if it exists, otherwise we should just queue the label and set its
+  // fragment pointer when we emit the next fragment.
+  MCDataFragment *DF = getOrCreateDataFragment();
+
+  assert(!SD.getFragment() && "Unexpected fragment on symbol data!");
+  SD.setFragment(DF);
+  SD.setOffset(DF->getContents().size());
+}
+
 void WinCOFFStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
   llvm_unreachable("not implemented");
 }