move three lowering hooks from MAI to TLOF and make one of them

semantic instead of syntactic.  This completes MCization of
darwin/x86[-64]!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98145 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/TargetLoweringObjectFileImpl.cpp

@@ -466,6 +466,14 @@ getMachOSection(StringRef Segment, StringRef Section,
 
 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;
+  
   if (UniquingMap != 0)
     ((MachOUniqueMapTy*)UniquingMap)->clear();
   TargetLoweringObjectFile::Initialize(Ctx, TM);