two changes:

1) nuke ConstDataCoalSection, which is dead.
2) revise my previous patch for rdar://8018335,
  which was completely wrong.  Specifically, it doesn't 
  make sense to mark __TEXT,__const_coal as PURE_INSTRUCTIONS,
  because it is for readonly data.  templates (it turns out)
  go to const_coal_nt.  The real fix for rdar://8018335 was
  to give ConstTextCoalSection a section kind of ReadOnly 
  instead of Text.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112496 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/TargetLoweringObjectFileImpl.cpp

@@ -518,11 +518,6 @@ void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
                                    SectionKind::getText());
   ConstTextCoalSection
     = getContext().getMachOSection("__TEXT", "__const_coal", 
-                                   MCSectionMachO::S_COALESCED |
-                                   MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
-                                   SectionKind::getText());
-  ConstDataCoalSection
-    = getContext().getMachOSection("__DATA","__const_coal",
                                    MCSectionMachO::S_COALESCED,
                                    SectionKind::getReadOnly());
   ConstDataSection  // .const_data