Prep for merging 3.4: Undo changes from 3.3 branch

lib/MC/MCStreamer.cpp

 //===- lib/MC/MCStreamer.cpp - Streaming Machine Code Output --------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #include "llvm/MC/MCStreamer.h"
@@ skipping 17 matching lines @@
 }
 
 MCStreamer::~MCStreamer() {
   for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
     delete W64UnwindInfos[i];
 }
 
 void MCStreamer::reset() {
   for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
     delete W64UnwindInfos[i];
-  W64UnwindInfos.clear();
   EmitEHFrame = true;
   EmitDebugFrame = false;
   CurrentW64UnwindInfo = 0;
   LastSymbol = 0;
   SectionStack.clear();
   SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
 }
 
 const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context,
                                           const MCSymbol *A,
@@ skipping 568 matching lines @@
   if (!FrameInfos.empty() && !FrameInfos.back().End)
     report_fatal_error("Unfinished frame!");
 
   FinishImpl();
 }
 
 MCSymbolData &MCStreamer::getOrCreateSymbolData(MCSymbol *Symbol) {
   report_fatal_error("Not supported!");
   return *(static_cast<MCSymbolData*>(0));
 }