lto/addAsmGlobalSymbols: fail fracefully when the target does not define AsmParser.

tools/lto/LTOModule.cpp

 //===-- LTOModule.cpp - LLVM Link Time Optimizer --------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file implements the Link Time Optimization library. This library is
@@ skipping 611 matching lines @@
   SrcMgr.AddNewSourceBuffer(Buffer, SMLoc());
   OwningPtr<MCAsmParser> Parser(createMCAsmParser(SrcMgr,
                                                   Context, *Streamer,
                                                   *_target->getMCAsmInfo()));
   OwningPtr<MCSubtargetInfo> STI(_target->getTarget().
                       createMCSubtargetInfo(_target->getTargetTriple(),
                                             _target->getTargetCPU(),
                                             _target->getTargetFeatureString()));
   OwningPtr<MCTargetAsmParser>
     TAP(_target->getTarget().createMCAsmParser(*STI, *Parser.get()));
+  if (!TAP) {

[nlewycky, 2011/09/08 00:34:43]

No braces.

+    return true;
+  }
+
   Parser->setTargetParser(*TAP);
   int Res = Parser->Run(false);
   if (Res)
     return true;
 
   for (RecordStreamer::const_iterator i = Streamer->begin(),
          e = Streamer->end(); i != e; ++i) {
     StringRef Key = i->first();
     RecordStreamer::State Value = i->second;
     if (Value == RecordStreamer::DefinedGlobal)
@@ skipping 79 matching lines @@
   else
     return lto_symbol_attributes(0);
 }
 
 const char *LTOModule::getSymbolName(uint32_t index) {
   if (index < _symbols.size())
     return _symbols[index].name;
   else
     return NULL;
 }